CN114448460B - Radio frequency system, equipment and control method - Google Patents

Abstract

The application provides a radio frequency system, a device and a control method, which are used for realizing the transmission of signals of different frequency bands. The radio frequency system includes: a first transmission circuit, a second transmission circuit and a control circuit; the first transmission circuit comprises a first frequency mixer, a first power amplification unit and a first transceiving circuit which are sequentially connected, and a second input end of the first frequency mixer is connected with the first phase-locked loop; the second transmission circuit comprises a second frequency mixer, a second power amplification unit and a second transceiving circuit which are sequentially connected, and a second input end of the second frequency mixer is connected with a second phase-locked loop; and the control circuit is used for controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal and supplying the first analog signal to the first mixer and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal and supplying the second analog signal to the second mixer when the first signal input by the input end of the first transmission circuit and the second signal input by the input end of the second transmission circuit are signals with different frequency bands.

Description

A radio frequency system, device and control method

technical field

The present application relates to the technical field of wireless communication, and in particular to a radio frequency system, equipment and control method.

Background technique

At present, a radio frequency system usually includes two transmission circuits and a phase-locked loop, and both transmission circuits are connected to the phase-locked loop, as shown in Figure 1, the phase-locked loop is respectively connected to the frequency mixing circuit in the first transmission circuit Mixer 1 and mixer 2 in the second transmission circuit. The phase-locked loop can provide analog signals to mixer 1 and mixer 2 at the same time.

If the first signal input to the first transmission circuit in the radio frequency system and the second signal input to the second transmission circuit are both signals of the same frequency band (such as the first frequency band), the phase-locked loop will correspond to the signal of the first frequency band The analog signal 1 is provided to the mixer 1 and the mixer 2 respectively, the mixer 1 mixes the first signal based on the analog signal 1, and the mixer 2 can also perform the mixing process on the second signal based on the analog signal 1 at the same time Mixing processing, the radio frequency system can transmit two signals of the same frequency band at the same time.

If the first signal input to the first transmission circuit in the radio frequency system and the second signal input to the second transmission circuit are signals of different frequency bands, it is assumed that the first signal input to the first transmission circuit in the radio frequency system is the first The signal of the frequency band, the second signal input to the second transmission circuit is the signal of the second frequency band. Since the phase-locked loop can only provide one kind of analog signal (analog signal 1 corresponding to the first frequency band signal or analog signal 2 corresponding to the second frequency band signal), if the phase-locked loop is both mixer 1 and mixer 2 The analog signal 1 is provided, and the mixer 1 in the first transmission circuit can perform frequency mixing processing on the first signal based on the analog signal 1, so that the radio frequency system can transmit a signal in the first frequency band. However, the mixer 2 in the second transmission circuit needs to perform frequency mixing processing on the second signal based on the analog signal 2 in order to transmit the second frequency band signal. Because the analog signal received by mixer 2 is analog signal 1 instead of analog signal 2, the second signal cannot be mixed, and the radio frequency system cannot send the second frequency band signal, so the radio frequency system cannot send different frequency bands at the same time signal of.

Contents of the invention

The present application provides a radio frequency system, equipment and control method, which are used to realize the transmission of signals in different frequency bands.

In a first aspect, an embodiment of the present application provides a radio frequency system, including a first transmission circuit, a second transmission circuit, and a control circuit. Wherein, the first transmission circuit includes a first mixer, a first power amplifying unit, and a first transceiver circuit connected in sequence, and the first input terminal of the first mixer is connected to the input of the first transmission circuit terminal, and the second input terminal of the first mixer is connected to the first phase-locked loop. The second transmission circuit includes a second mixer, a second power amplifying unit, and a second transceiver circuit connected in sequence, the first input end of the second mixer is connected to the input end of the second transmission circuit, The second input terminal of the second mixer is connected to the second phase-locked loop. The control circuit is configured to, when the first signal input to the input end of the first transmission circuit and the second signal input to the input end of the second transmission circuit are signals of different frequency bands, according to the controlling the frequency band of the first phase-locked loop to generate a first analog signal to the first mixer, and controlling the second phase-locked loop to generate a second analog signal to the second mixer.

With the above system structure, when the first signal and the second signal input to the radio frequency system are signals of different frequency bands, the control circuit generates the first analog signal by controlling the first phase-locked loop, and controls the second phase-locked loop to generate the second analog signal , so that the second mixer can mix the second signal based on the second analog signal provided by the second phase-locked loop, and the first mixer can also perform mixing processing based on the first analog signal provided by the first phase-locked loop, Perform frequency mixing processing on the first signal, and the radio frequency system realizes corresponding mixing processing on signals in different frequency bands at the same time, and the signals mixed by each mixer are respectively processed by the power amplification unit and the transceiver circuit in each transmission circuit. send.

In a possible design, the control circuit is further configured to: when the first signal and the second signal are signals in the same frequency band, control the first phase-locked loop and the second phase-locked loop One phase-locked loop is in working state, and the other phase-locked loop is in non-working state. The phase-locked loop in the working state is controlled according to the same frequency band to generate third analog signals and provide them to the first mixer and the second mixer respectively.

With the above system structure, when the first signal and the second signal input to the radio frequency system are signals of the same frequency band, the control circuit can control one of the two phase-locked loops to be the first mixer and the second mixer. The frequency converter provides a third analog signal. Both the first mixer and the second mixer can mix the first signal and the second signal based on the third analog signal provided by the first phase-locked loop, and the radio frequency system can simultaneously perform corresponding processing on the same frequency band signal The frequency mixing process of each mixer sends the signals mixed by each mixer through the power amplifying unit and the transceiver circuit in each transmission circuit respectively. RF circuits can serve multiple-input multiple-output scenarios. The control circuit can also control a phase-locked loop to be in a non-working state, so as to reduce power consumption when the radio frequency system sends signals of the same frequency band.

In a possible design, the control circuit includes a controller and a first switch. The first end of the first switch is respectively connected to the second input end of the first mixer and the first phase-locked loop, and the second end of the first switch is respectively connected to the second mixer The second input terminal of the device is connected to the second phase-locked loop. The controller is configured to control the first switch to be in an off state when the first signal and the second signal are signals of different frequency bands, and control the first switch according to the frequency band of the first signal. a phase-locked loop generates a first analog signal, and inputs the first analog signal into the first mixer; and controls the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, and inputting the second analog signal into the second mixer; when the first signal and the second signal are signals of the same frequency band, controlling the first switch to be in a conducting state, according to the same The phase-locked loop in the working state of frequency band control generates a third analog signal, and the third analog signal is respectively provided to the mixers connected to the phase-locked loop in the non-working state through the first switch.

With the above system structure, the controller in the control circuit switches the analog signal input to the second mixer by adjusting the on-off state of the first switch. If the first signal and the second signal input to the radio frequency system are signals of different frequency bands, the first switch is controlled to be turned off, so that the first analog signal generated by the first phase-locked loop is input into the first mixer and the second The second analog signal generated by the second phase-locked loop is input to the second mixer to ensure that the radio frequency system performs corresponding mixing processing on signals of different frequency bands. If the first signal and the second signal input to the radio frequency system are signals of the same frequency band, the first switch is controlled to be closed, so that the third analog signal generated by the phase-locked loop in the working state is respectively input to the first mixer and the second signal. In the second mixer, when the radio frequency system sends the same frequency band signal, one of the two phase-locked loops is in the working state to provide analog signals for the first mixer and the second mixer, while the other phase-locked loop It can be in a non-working state, such as a stop working state, to reduce the power consumption of the radio frequency system.

In a possible design, the phase-locked loop in the working state is the first phase-locked loop, and the control circuit further includes a second switch. Wherein, the first end of the second switch is connected to the second phase-locked loop, and the second end of the second switch is respectively connected to the second input end of the second mixer and the second input end of the first switch. second end. The controller is specifically configured to control the second switch to be in an on state when the first signal and the second signal are signals of different frequency bands; when the first signal and the second signal When it is a signal of the same frequency band, the second switch is controlled to be in an off state.

With the above system structure, the controller in the control circuit adjusts the analog signal input to the second mixer by switching the on-off state of the first switch and the second switch. When the second switch is in a conducting state, the second analog signal generated by the second phase-locked loop can be input to the second mixer through the second switch. When the second switch is in the off state, the second analog signal generated by the second phase-locked loop cannot be provided to the first mixer or the second mixer, and there is no need to close the second phase-locked loop to make the second phase-locked loop in Non-working state, thereby avoiding the stabilization time required for the second phase-locked loop to switch between the non-working state and the working state, and also reducing the waiting time when switching the radio frequency system from sending signals of different frequency bands to sending signals of the same frequency band duration.

In a possible design, the second transmission circuit further includes a third switch, a third power amplification unit, and a third transceiver circuit, and the third power amplification unit is connected to the third transceiver circuit. The third switch is a single-pole double-throw switch, the fixed end of the third switch is connected to the output end of the second mixer, and the first contact end of the third switch is connected to the second power amplifier unit, and the second contact terminal of the third switch is connected to the third power amplifying unit. The control circuit is further configured to control the fixed end of the third switch and the first contact end to be in a conduction state when the first signal and the second signal are signals of different frequency bands, so that The signal output by the second mixer is provided to the second power amplifying unit; when the first signal and the second signal are signals in the same frequency band, control the fixed terminal of the third switch and the The second contact terminal is in a conduction state, so that the signal output by the second mixer is provided to the third power amplifying unit.

With the above system structure, the control circuit can adjust the on-off state of the third switch fixed terminal and each contact terminal, when the second signal and the first signal are in the same frequency band. The signal output by the second mixer can be sent through the second power amplifying unit and the second transceiver circuit, and when the second signal and the first signal are in different frequency bands, the signal output by the second mixer can be sent through the third power amplifying unit and The third transceiver circuit transmits, realizes keeping the working state of the second power amplifying unit and the second transceiver circuit as the working state corresponding to the same frequency band, without switching the working state of the second transceiver circuit of the second power amplifying unit, avoiding waiting due to switching The stabilization time generated by the working state of the power amplification unit shortens the processing time for the radio frequency system to send signals in different frequency bands, and also shortens the processing time for the radio frequency system to switch from sending signals in different frequency bands to sending signals in the same frequency band.

In a possible design, the control circuit includes a fourth switch, a fifth switch, a sixth switch, a third mixer, and a controller. The first end of the fourth switch is respectively connected to the input end of the second transmission circuit and the first end of the fifth switch, and the second end of the fourth switch is connected to the first input of the third mixer terminal, the second terminal of the fifth switch is connected to the first input terminal of the second mixer, and the second input terminal of the third mixer is respectively connected to the first phase-locked loop and the first mixer frequency converter. The sixth switch is a single-pole double-throw switch, the fixed end of the sixth switch is connected to the second power amplifying unit, and the first contact end of the sixth switch is connected to the output of the third mixer terminal, and the second contact terminal of the sixth switch is connected to the output terminal of the second mixer. The controller is specifically configured to, when the first signal and the second signal are signals of different frequency bands, control the fourth switch to be in the off state, control the fifth switch to be in the on state, and control The fixed end of the sixth switch is in a conduction state with the second contact end of the sixth switch, so that the signal output by the second mixer is provided to the second power amplifying unit. When the first signal and the second signal are signals of the same frequency band, control the fourth switch to be in the on state, control the fifth switch to be in the off state, and control the fixed terminal of the sixth switch The first contact end of the sixth switch is in a conduction state, so that the signal output by the third mixer is provided to the second power amplifying unit.

With the above system structure, the control circuit can adjust the on-off state of the fourth switch and the fifth switch, and switch the mixer into which the second signal input to the second transmission circuit flows. If the second signal is in the same frequency band as the first signal, the first analog signal generated by the first phase-locked loop is compared to the first signal by the first mixer and the third mixer connected to the first phase-locked loop respectively. , performing frequency mixing processing on the second signal. The control circuit can adjust the on-off state of the sixth switch, so that the mixed signal of the second signal flows into the second power amplifying unit for amplifying processing, and is sent through the second transceiver circuit. If the second signal and the first signal are in different frequency bands, the second mixer performs frequency mixing processing on the second signal based on the second analog signal generated by the second phase-locked loop. To keep the second phase-locked loop in the working state of generating the second analog signal, it is not necessary to switch the working state of the second phase-locked loop, avoid waiting for the stabilization time of the second phase-locked loop due to the switching of the working state, and shorten the transmission of the radio frequency system The processing time of signals in different frequency bands.

In a possible design, the second transmission circuit further includes a seventh switch, an eighth switch, a fourth mixer, a fourth power amplifying unit, and a fourth transceiver circuit, and the fourth power amplifying unit is connected to the The fourth transceiver circuit. Wherein, the first end of the seventh switch is respectively connected to the input end of the second transmission circuit and the first end of the eighth switch, and the second end of the seventh switch is connected to the fourth mixer The first input terminal, the second terminal of the eighth switch is connected to the first input terminal of the second mixer, and the second input terminal of the fourth mixer is respectively connected to the first phase-locked loop and the first mixer, and the output end of the fourth mixer is connected to the fourth power amplifying unit. The control circuit is further configured to control the seventh switch to be in the off state and the eighth switch to be in the on state when the first signal and the second signal are signals of different frequency bands, so that The second signal is input to the second mixer through the eighth switch; when the first signal and the second signal are signals in the same frequency band, controlling the seventh switch to be in a conducting state, and controlling the eighth switch to be in an off state, so that the second signal is input to the fourth mixer through the seventh switch.

With the above system structure, the control circuit can adjust the on-off state of the seventh switch and the eighth switch, and switch the mixer into which the second signal input to the second transmission circuit flows. If the second signal is in the same frequency band as the first signal, the third mixer performs frequency mixing processing on the second signal based on the first analog signal generated by the first phase-locked loop, and inputs the second signal to the fourth power amplifying unit, and the second signal is input to the fourth power amplifying unit. After the four amplification units amplify and process the signal, the signal is sent through the fourth transceiver circuit. If the second signal and the first signal are in different frequency bands, the second signal is mixed by the second mixer based on the second analog signal generated by the second phase-locked loop, and input to the second power amplifying unit. After the second power amplifying unit amplifies the signal, the signal is sent via the second transceiver circuit. Realize that when the radio frequency system sends signals of different frequency bands and the same frequency band, the working state of the second power amplifier unit is not changed, avoiding waiting for the stabilization time caused by the working state of the power amplifier unit, and shortening the processing time for the radio frequency system to send signals of different frequency bands .

In a possible design, the control circuit is further configured to control the second power amplifying unit to operate on the same frequency band when the first signal and the second signal are signals of different frequency bands. A working state in which signals of the same frequency band are amplified; when the first signal and the second signal are signals of different frequency bands, the second power amplifying unit is controlled according to the frequency band of the second signal to operate on the A working state in which the second signal is amplified.

With the above system structure, the control circuit controls the working state of the second power amplifying unit according to the frequency band of the second signal, realizes multiplexing the second power amplifying unit by changing the working state of the second power amplifying unit, and simplifies the structure of the radio frequency system.

In a possible design, the control circuit is specifically configured to: when the first signal and the second signal are signals of different frequency bands, the first signal before the second signal is input at the input end of the second transmission circuit time, controlling the second phase-locked loop to generate the second analog signal according to the frequency band of the second signal, wherein the first time is the same as the time when the second signal is input to the input terminal of the second transmission circuit The second duration between is not less than the stabilization time of the second phase-locked loop.

With the above system structure, in order to shorten the time for the radio frequency system to switch from the state of sending signals in different frequency bands to the state of sending signals in the same frequency band, the control circuit can switch the second power amplifying unit to the second signal before the second signal is input at the input end of the second transmission circuit The corresponding working status of the frequency band. For example, the second phase-locked loop generates the second analog signal at the first moment, and the second duration between the first moment and the moment when the second signal is input to the input terminal of the second transmission circuit is not less than the stabilization time of the second phase-locked loop . The control circuit can also control the second phase-locked loop to generate the second analog signal at the first moment before the input terminal of the second transmission circuit inputs the second signal when the first signal and the second signal are signals of different frequency bands, shortening the waiting time. The stabilization time of the second phase-locked loop realizes reducing the processing time when the radio frequency system sends signals of different frequency bands.

In a possible design, the control circuit is further configured to, when the first signal and the second signal are signals of different frequency bands, input the second signal at the input end of the second transmission circuit At the second moment, the second power amplifying unit is controlled to be in the working state of amplifying the second signal, wherein the second moment is the same as the moment when the second signal is input to the input terminal of the second transmission circuit The first duration between them is not less than the stabilization time of the second power amplifying unit.

With the above system structure, if the working state of the second power amplifying unit is changed, the second power amplifying unit needs a certain period of time to stabilize in the changed working state. In order to shorten the time for the radio frequency system to switch from the state of sending signals in different frequency bands to the state of sending signals in the same frequency band, the control circuit can switch the second power amplifying unit to work corresponding to the frequency band of the second signal before the second signal is input at the input end of the second transmission circuit state. For example, switching is performed at the second moment, and the first duration between the second moment and the moment when the second signal is input to the input terminal of the second transmission circuit is not less than the stabilization time of the second power amplifying unit.

In a possible design, the control circuit is further configured to control the second power amplifying unit to operate on the same frequency band when the first signal and the second signal are signals of different frequency bands. A working state in which signals of the same frequency band are amplified; when the first signal and the second signal are signals of different frequency bands, the second power amplifying unit is controlled according to the frequency band of the second signal to operate on the A working state in which the second signal is amplified.

With the above system structure, the control circuit controls the working state of the second power amplifying unit according to the frequency band of the second signal, realizes multiplexing the second power amplifying unit by changing the working state of the second power amplifying unit, and simplifies the structure of the radio frequency system.

In a possible design, the second transceiver circuit further includes a single-pole multi-throw switch and multiple antennas. The control circuit is also used to control the single-pole multi-throw switch to make the connection between the second power amplifying unit and the first antenna be in a conduction state, and the first antenna is any one of the plurality of antennas.

With the above system structure, the control circuit controls the second signal to be sent by one of the multiple antennas through the on-off state of the SPMT switch in the second transceiver circuit.

In a possible design, the radio frequency system also includes a modulation and demodulation circuit. The modulation and demodulation circuits are respectively connected to the first transmission circuit and the second transmission circuit, and are used to provide the first signal to the first transmission circuit and the second signal to the second transmission circuit.

In the second aspect, the embodiment of the present application also provides a radio frequency system control method, which is applied to a radio frequency system, and the radio frequency system includes a first transmission circuit and a second transmission circuit, and the first transmission circuit includes a first phase-locked loop , the second transmission circuit includes a second phase-locked loop, and the method includes: if it is determined that the first signal input to the first transmission circuit and the second signal input to the second transmission circuit are signals of different frequency bands; controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit uses the first analog signal to perform frequency mixing processing on the first signal; according to the The frequency band of the second signal controls the second phase-locked loop to generate a second analog signal, so that the second transmission circuit uses the second analog signal to perform frequency mixing processing on the second signal.

In a possible design, the method further includes: if it is determined that the first signal and the second signal are signals in the same frequency band, controlling the first phase-locked loop and the second phase-locked loop according to the same frequency band Any phase-locked loop in the phase-locked loop generates a third analog signal; the third analog signal is provided to the first transmission circuit and the second transmission circuit, so that the first transmission circuit uses the first transmission circuit performing frequency mixing processing on the first signal with three analog signals, and causing the second transmission circuit to perform frequency mixing processing on the second signal using the third analog signal.

In a possible design, the second transmission circuit further includes a second power amplifying unit, and the method further includes: if it is determined that the first signal and the second signal are signals in the same frequency band, according to the same Frequency band control The second power amplifying unit is in the working state of amplifying signals of the same frequency band; if it is determined that the first signal and the second signal are signals of different frequency bands, the second transmission circuit At the first moment before the input of the second signal is input, the second power amplifying unit is controlled according to the frequency band of the second signal to be in the working state of amplifying the second signal, wherein the first The first duration between a moment and the moment when the second signal is input is not less than the stabilization time of the second power amplifying unit.

In a possible design, the controlling the second phase-locked loop to generate the second analog signal according to the frequency band of the second signal includes: inputting the second signal at the input terminal of the second transmission circuit At the second previous moment, the second phase-locked loop is controlled to generate a second analog signal according to the frequency band of the second signal, wherein the second duration between the second moment and the moment when the second signal is input is not less than The second PLL stabilization time.

In a third aspect, the embodiment of the present application further provides a communication device, including the radio frequency system as provided in the first aspect and any possible design thereof.

For the technical effects that can be achieved in the above second and third aspects, please refer to the description of the technical effects that can be achieved by the corresponding designs in the above first aspect, and will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a radio frequency system in the prior art;

FIG. 2 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a transceiver circuit provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is a schematic flowchart of a method for controlling a radio frequency system provided by an embodiment of the present application.

Detailed ways

New radio (new radio, NR) technology, also known as 5G technology, is a communication technology that can transmit data through millimeter waves. The 5G network can send data to the terminal in a targeted manner. Before sending data to the terminal, the base station needs to detect the channel quality of the terminal. Generally, sending a sounding reference signal (sounding reference signal, SRS) by the terminal to the base station can assist the base station in determining the downlink channel quality of the terminal.

With the increasing demand for data transmission from terminals to base stations, such as live data transmission, high-definition video transmission, etc., 5G networks are faced with the challenge of ensuring the same downlink performance, improving uplink performance and shortening delay. NR supplementary uplink (supplementary uplink, SUL ) technology and NR carrier aggregation (carrier aggregation, CA) technology are proposed.

NR SUL is a technology that improves the uplink coverage of terminals through a supplementary low-band uplink. Usually, the supplementary uplink frequency band in the NR SUL technology may be a Long Term Evolution (Long Term Evolution, LTE) frequency band, and the supplementary frequency band is usually a frequency band with a lower frequency. Since the frequency band for data transmission in 5G technology is relatively high, the signal loss during transmission is relatively large, and the transmit power of the terminal is limited, resulting in limited coverage of the uplink for the terminal to send signals to the base station. The terminal uses the supplementary uplink frequency band to transmit signals. Due to the low loss in the transmission process, the coverage of the terminal sending signals to the base station is expanded, and the uplink performance is improved.

It is assumed that the base station and the terminal use the n41 frequency band in 5G NR to transmit data, and the supplementary frequency band in the NR SUL scenario is the n80 frequency band. When the demand for data transmission from the terminal to the base station increases, in order to improve the service quality of uplink communication, the terminal can send two channels of n80 frequency band signals to the base station through the two transmission circuits of the existing radio frequency system (as shown in Figure 1). However, in order to ensure that the base station can determine the channel quality of the n41 frequency band of the terminal, the terminal also needs to send the SRS of the n41 frequency band to the base station.

When the existing RF system transmits SRS in the n41 frequency band, the phase-locked loop provides the second mixer with an analog signal corresponding to the n41 frequency band, and the first mixer does not provide an analog signal corresponding to the n80 frequency band due to the phase-locked loop The analog signal makes it impossible to perform corresponding mixing processing on the n80 frequency band signal, resulting in the inability to send the n80 frequency band signal. It can be seen that the existing radio frequency system cannot transmit the signal of the n80 frequency band while transmitting the signal of the n41 frequency band, and the transmission of the signal of the n80 frequency band by the radio frequency system will be interrupted, causing the terminal to delay sending the signal of the n80 frequency band to the base station.

NR CA is a technology that increases transmission bandwidth through carrier combination. The same terminal is served by a primary carrier (primary component carrier, PCC) and a secondary carrier (secondary component carrier, SCC). The cell corresponding to the PCC is the primary cell, the cell corresponding to the SCC is the secondary cell, and signals of different frequency bands used by different cells transmit data. The secondary cell can provide additional resources for the terminal, such as undertaking data transmission and so on. Before the secondary cell provides resources for the terminal, it is also necessary to determine the channel quality between the secondary cell and the terminal. The terminal may send an SRS to the secondary cell to assist the secondary cell in determining channel quality.

Assume that the primary cell and the terminal use the n1 frequency band in 5G NR to transmit data, and the secondary cell and the terminal use the n78 frequency band to transmit data. When the terminal needs to transmit data to the main cell, in order to improve the quality of uplink communication service, the terminal can send two channels of n1 frequency band signals to the main cell through the two transmission circuits of the existing radio frequency system (as shown in Figure 1). If the secondary cell provides additional resources for the terminal, the secondary cell needs to determine the channel quality of the n78 frequency band of the terminal before providing the additional resources for the terminal. The secondary cell may determine the channel quality of the n78 frequency band by sending the SRS of the n78 frequency band from the receiving terminal to the secondary cell.

When the terminal uses the existing radio frequency system to send SRS in the n78 frequency band, the phase-locked loop provides the second mixer with an analog signal corresponding to the n78 frequency band, and the first mixer does not provide an analog signal corresponding to the n1 frequency band because of the phase-locked loop The analog signal of the n1 frequency band cannot be mixed accordingly, resulting in the inability to send the signal of the n1 frequency band. It can be seen that the existing radio frequency system cannot transmit the signal of the n1 frequency band while transmitting the signal of the n78 frequency band, and the transmission of the n1 signal of the radio frequency system will be interrupted, causing the terminal to delay sending the signal of the n1 frequency band to the main cell.

In view of this, an embodiment of the present application provides a radio frequency system, which is used to realize that a signal transceiving device can simultaneously transmit signals of different frequency bands. The radio frequency system, equipment, and control method provided by the embodiments of the present application can also be applied in NRSUL scenarios and NR CA scenarios. When the radio frequency system can send SRS to the base station or secondary cell, it can also send uplink signals to the base station or primary cell.

"Or" in the embodiment of this application describes the association relationship of associated objects, indicating that there may be two kinds of relationships, for example, A or B, which may indicate: A exists alone, and B exists alone, where A and B can be singular or plural.

The term "connection" involved in this application describes the connection relationship between two objects, and can represent two connection relationships. Condition.

In the embodiments of the present application, "exemplary", "in some embodiments", "in another embodiment" and the like are used as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" is intended to present concepts in a concrete manner.

The "antenna" in the embodiments of the present application may include any suitable configuration, structure and/or arrangement of one or more antenna elements, components, units, assemblies and/or arrays. In some examples, the antenna may use separate transmit and receive antenna elements for transmit and receive functions.

The "power amplifying unit" in the embodiment of the present application may include any suitable configuration, structure and/or arrangement of one or more power amplifiers, components, units, assemblies.

The "transceiving circuit" in this embodiment of the present application may include one or more antennas. In some examples, the transceiver circuit can implement the sending and receiving functions separately. The transceiver circuit may include digital signal processing, a digital-to-analog converter, a baseband filter, a radio frequency (radio frequency, RF) modulator, a filter, an RF splitter, a switch, and other suitable configurations to implement the sending function. The transceiver circuit may also include a combiner, a demodulator, a baseband filter, an analog-to-digital converter, and other suitable configurations to realize the receiving function.

The "frequency band" in this embodiment of the present application may be a frequency band allocated in the existing IEEE802.11 standard, and/or a frequency band allocated in a future version thereof. For example, the "frequency band" may be a frequency band allocated by an existing cellular specification and/or protocol (such as a 3rd generation partnership project (3rd generation partnership project, 3GPP) protocol, LTE protocol), or may be a future version of a cellular specification and The/or the frequency band divided by the protocol may also be the frequency band divided by the wireless fidelity (wireless fidelity, WiFi) protocol in the wireless local area network, and may also be the frequency band divided by the bluetooth protocol.

It should be pointed out that words such as "first" and "second" involved in the embodiments of the present application are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order. The equals mentioned in the embodiment of the present application can be used in conjunction with greater than, applicable to the technical solution adopted when greater than, and can also be used in conjunction with less than, applicable to the technical solution adopted when less than, it should be noted that when equal to and greater than When used, do not use it together with less than; when equal to and less than use it together, do not use it together with greater than.

The radio frequency system provided in the embodiment of the present application may be integrated in a communication device, such as a signal transceiving device, and may also be integrated in a processor or a chip of the signal transceiving device. The signal transceiving device may be a terminal or a base station. In an example, when the signal transceiving device is a base station, the base station may synchronously transmit signals of different frequency bands, for example, signals of different frequency bands to multiple terminals with different frequency bands for downlinking to the terminal.

In another example, when the signal transceiving device is a terminal, the terminal can communicate with the base station, and the terminal can synchronously send signals of different frequency bands to the base station, such as synchronously sending signals of uplink frequency bands and SRS. When the signal transceiver device is a terminal, the terminal can also be used as a relay device to communicate with other terminals. The signals of different frequency bands synchronously sent by the terminal are signals of the uplink frequency band to the base station, or they can be used to send the downlink signal of the terminal to other terminals. The signal of the frequency band of the link.

First, the radio frequency system provided by the embodiment of the present application is introduced. As shown in FIG. 2 , the radio frequency system may include a first transmission circuit 20 , a second transmission circuit 21 and a control circuit. The first transmission circuit 20 includes a first mixer 201, a first power amplifying unit 202 and a first transceiver circuit 203 connected in sequence, and the first input terminal 201a of the first mixer 201 is connected to the input terminal of the first transmission circuit 20 20A, the second input terminal 201b of the first mixer 201 is connected to the first phase-locked loop 204 .

The second transmission circuit 21 includes a second mixer 205, a second power amplifying unit 206, and a second transceiver circuit 207 connected in sequence, and the first input terminal 205a of the second mixer 205 is connected to the input terminal of the second transmission circuit 21 21A, the second input terminal 205b of the second mixer 205 is connected to the second phase-locked loop 208 .

The control circuit is used to control the first signal according to the frequency band of the first signal when the first signal input by the input terminal 20A of the first transmission circuit 20 and the second signal input by the input terminal 21A of the second transmission circuit 21 are signals of different frequency bands. The PLL 204 generates a first analog signal and supplies it to the first mixer 201 , and controls the second PLL 208 according to the frequency band of the second signal to generate a second analog signal and supplies it to the second mixer 205 .

In a possible implementation manner, the control circuit in the radio frequency system may communicate with the first phase-locked loop 204, the second phase-locked loop 208, the first power amplifying unit 202, the second power amplifying unit 206, the first transceiver circuit 203, The second transceiver circuit 207 and the like are connected. The control circuit can control the working states of the first phase-locked loop 204 , the second phase-locked loop 208 , the first power amplifying unit 202 , the second power amplifying unit 206 , the first transceiver circuit 203 , and the second transceiver circuit 207 . Wherein, the control circuit may include components such as a controller, a switch, and a mixer. In one example, a controller may be implemented as one or more processors. The processor may be a baseband processor.

In yet another possible implementation manner, the radio frequency system may further include a modulation and demodulation circuit, and the modulation and demodulation circuit is connected to the first transmission circuit 20 and the second transmission circuit 21 for inputting The first signal, and the second signal is input to the input terminal 21A of the second transmission circuit 21 .

The modulation and demodulation circuit in the radio frequency system can be connected with the control circuit. In an example, the control circuit may learn that the first signal and the second signal are signals of different frequency bands or signals of the same frequency band through a feedback signal sent to it by the modulation and demodulation circuit. In yet another example, the control circuit may control the modulation and demodulation circuit to generate the first signal and the second signal, and input the first signal to the first transmission circuit 20 , and input the second signal to the second transmission circuit 21 .

The input terminal of the first power amplifying unit 202 in the first transmission circuit 20 is connected to the input terminal 201c of the first mixer 201 for receiving the signal output by the first mixer 201 . The first power amplifying unit 202 can amplify the signal output by the first mixer 201 , and input the amplified signal to the first transceiver circuit 203 connected to the output end of the first power amplifying unit 202 . The first transceiver circuit 203 may directly transmit the signal provided by the first power amplifying unit 202, or may process the signal provided by the first power amplifying unit 202 according to a preset signal processing process before transmitting. Exemplarily, the first power amplifying unit 202 may include a register, a front-end switch, at least one power amplifier, and at least one filter. The first transceiving circuit 203 may include at least one antenna.

The input terminal of the second power amplifying unit 206 in the second transmission circuit 21 is connected to the input terminal 201c of the second mixer 205 for receiving the signal output by the second mixer 205 . The second power amplifying unit 206 can amplify the signal output by the second mixer 205 , and input the amplified signal to the second transceiver circuit 207 connected to the output terminal of the second power amplifying unit 206 . The second transceiver circuit 207 can directly send the signal provided by the second power amplifying unit 206, or can process the signal provided by the second power amplifying unit 206 according to a preset signal processing process before sending it. Exemplarily, the second power amplifying unit 206 may include a register, a front-end switch, multiple power amplifiers, and at least one filter. The second transceiving circuit 207 may include at least one antenna.

The input terminal and the output terminal of the first mixer 201 are denoted as the first input terminal 201a, the second input terminal 201b and the output terminal 201c of the first mixer 201, respectively. The output terminal 201c of the first mixer 201 is connected to the input terminal of the first power amplifying unit 202 . The first mixer 201 is used for mixing the input signal received by the first input terminal 201a and the analog signal received by the second input terminal 201b (for example, addition processing or difference processing, etc.), and the processed The signal is input to the first power amplifying unit 202 through the output terminal 201c.

The input and output of the second mixer 205 are denoted as the first input 205a, the second input 205b and the output 205c of the second mixer 205, respectively. The output terminal 205c of the second mixer 205 is connected to the input terminal of the second power amplifying unit 206 . The second input terminal 205 b of the second mixer 205 is connected to the output terminal of the second phase-locked loop 208 . The second mixer 205 is used for mixing the input signal received by the first input terminal 205a of the second mixer 205 and the analog signal received by the second input terminal 205b of the second mixer 205 (for example, Add processing or difference processing, etc.), and input the processed signal to the second power amplifying unit 206 through the output terminal 205c.

In a practical application scenario, the first input terminal 201a of the first mixer 201 may be the input terminal 20A of the first transmission circuit 20, and the third input terminal 205a of the second mixer 205 may be the input terminal 20A of the second transmission circuit 21. Input 21A.

In an example, in the scenario of sending 5G signals, since the more antennas the terminal can participate in sending SRS signals, the channel quality estimation will be more accurate and the downlink data transmission rate will be higher. The first transceiving circuit 203 or the second transceiving circuit 207 may also include multiple antennas. Exemplarily, taking the second transceiver circuit 207 including a plurality of antennas as an example, the second transceiver circuit 207 may also include a switch, such as a single-pole multi-throw switch, and the fixed contact of the single-pole multi-throw switch may be connected to the second power amplifying unit The output end of 206 is connected, and the contact ends of the single-pole multi-throw switch are respectively connected with multiple antennas. The control circuit can realize the transmission of the control signal from one antenna among the multiple antennas by controlling the on-off state of the fixed terminal and the multiple contact terminals of the single-pole multiple-throw switch. In an actual application scenario, the control circuit may control the second transceiver circuit 207 to send the SRS from different antennas in turn. The switching method or control method involved in controlling the switching switch by the control circuit so that the SRS is transmitted from different antennas in turn is not specifically limited in this application. Exemplarily, an existing polling SRS control method or an antenna switching method may be used.

FIG. 3 only exemplarily shows a connection mode between the switch and multiple antennas in the second transceiver circuit 207 . In an actual application scenario, multiple antennas and switches may also be connected in other connection ways to implement SRS transmission, which will not be listed here. The second transceiving circuit 207 may also include any suitable configuration, structure and/or arrangement capable of enabling the radio frequency circuit to have SRS transmission capability or signal reception capability. Exemplarily, the second transceiver circuit 207 further includes elements such as a demodulator, a baseband filter, and an analog-to-digital converter. The second transceiver circuit 207 can also be used for receiving signals.

In an example, the antenna in the first transceiver circuit 203 may be used to receive signals, and the first transceiver circuit 203 may also include components such as a demodulator, a baseband filter, and an analog-to-digital converter.

In a possible implementation manner, the frequency band of the first signal input by the modulation and demodulation circuit to the input terminal 20A of the first transmission circuit 20 is the first frequency band, and the frequency band of the second signal input to the input terminal 21A of the second transmission circuit 21 is The frequency band is also the first frequency band, and the first signal and the second signal are signals of the same frequency band.

In yet another possible implementation manner, the frequency band of the first signal input by the modulation and demodulation circuit to the input terminal 20A of the first transmission circuit 20 is the first frequency band, and the second signal input to the input terminal 21A of the second transmission circuit 21 The frequency band is the second frequency band, and the first signal and the second signal are signals of different frequency bands. Exemplarily, both the first frequency band and the second frequency band may be 5G NR frequency bands. The first frequency band and the second frequency band may also be a frequency band of 5G NR and a frequency band of LTE respectively.

The control circuit can control the first phase-locked loop 204 to generate an analog signal. For example, the control circuit controls the first phase-locked loop 204 to generate analog signals corresponding to signals of different frequency bands by adjusting the power supply device that provides voltage to the input terminal of the first phase-locked loop 204 to change the voltage. The control circuit can also control the power supply device to stop supplying power to the first phase-locked loop 204, so as to control the first phase-locked loop 204 to stop generating analog signals. Similarly, the control circuit can also control the second phase-locked loop 205 to generate an analog signal.

In an example, the control circuit may control the first phase-locked loop 204 to generate the first analog signal according to the frequency band of the first signal input to the first transmission circuit 20 . For example, if the first signal is in the first frequency band, the control circuit controls the analog signal generated by the first phase-locked loop to have a corresponding relationship with the first frequency band. If the first signal is in the second frequency band, the control circuit controls the analog signal generated by the first phase-locked loop 204 to have a corresponding relationship with the second frequency band. The control circuit may control the first phase-locked loop 204 to generate an analog signal corresponding to the frequency band of the first signal according to the frequency band of the first signal. Similarly, the control circuit can control the analog signal corresponding to the frequency band of the second signal in the second phase-locked loop according to the frequency band of the second signal input to the second transmission circuit 21 .

In an example, the second power amplifying unit 206 may be a power amplifier module, including multiple power amplifiers and switching switches. The control circuit can switch the second power amplifying unit 206 to work states corresponding to different frequency bands by switching the switch in the second power amplifying unit 206 .

If the first signal input by the modulation and demodulation circuit to the input terminal 20A of the first transmission circuit 20 is in the same frequency band as the second signal input to the input terminal 21A of the second transmission circuit 21, the radio frequency system can send two channels of the same frequency band Signal. For ease of description, when the radio frequency system sends two signals of the same frequency band, it is called that the radio frequency system is in the dual transmission state of the same frequency band. The radio frequency system may be applied in a multiple input multiple output (multi input multi output, MIMO) scenario.

If the first signal input by the modulation and demodulation circuit to the input terminal 20A of the first transmission circuit 20 and the second signal input to the input terminal 21A of the second transmission circuit 21 are of different frequency bands, the radio frequency system can send two channels of signals of different frequency bands. Signal. For ease of description, when the radio frequency system sends two signals of different frequency bands, it is called that the radio frequency system is in the dual transmission state of different frequency bands.

The control circuit in the radio frequency system provided by the embodiment of the present application can switch the radio frequency system to be in the same frequency band dual transmission state or different frequency band dual transmission state according to whether the frequency band of the first signal and the frequency band of the second signal provided by the modulation and demodulation circuit are the same frequency band. hair status. If the frequency band of the first signal and the frequency band of the second signal are the same frequency band, the control circuit switches the radio frequency system to the dual transmission state of the same frequency band, so that the radio frequency system can send two signals of the same frequency band. If the frequency bands of the first signal and the frequency band of the second signal are in different frequency bands, the control circuit switches the radio frequency system to a dual transmission state of different frequency bands, so that the radio frequency system sends two signals of different frequency bands.

When the radio frequency system provided by the embodiment of the present application is in the dual transmission state of different frequency bands, the control circuit controls the first phase-locked loop 204 to generate the first analog signal, and the first analog signal corresponds to the frequency band of the first signal, so that the first mixer 201 may perform correct frequency mixing processing on the first signal. The first power amplification unit 202 amplifies the signal output by the first mixer 201 , and then the first transceiver circuit 203 transmits the amplified signal, so that the first transmission circuit 20 transmits the first signal.

The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the frequency band of the first signal, so that the second mixer 205 can correctly mix the second signal. The second power amplifying unit 206 amplifies the signal output by the second mixer 205 , and then the second transceiver circuit 207 transmits the amplified signal, so that the second transmission circuit 21 transmits the second signal.

When the radio frequency system provided by the embodiment of the present application is in the state of dual transmission in the same frequency band, the control circuit can control one of the two phase-locked loops to be in the working state and generate an analog signal. The control circuit can also control another phase-locked loop to be in a non-working state. For example, the phase-locked loop is controlled to stop generating analog signals, or the analog signal generated by the phase-locked loop is controlled not to be input to any mixer.

Exemplarily, the control circuit can control the first phase-locked loop 204 to be in the working state, and control the second phase-locked loop 208 to be in the non-working state. The control circuit controls the first phase-locked loop 204 to generate an analog signal corresponding to the frequency band of the first signal, such as a third analog signal.

In an example, when the radio frequency system is in a state of dual transmission in the same frequency band, the frequency band of the first signal and the frequency band of the second signal are both the first frequency band. When the radio frequency system is in the dual transmission state of different frequency bands, the frequency band of the first signal is the first frequency band, and the frequency band of the second signal is the second frequency band.

In an example, the radio frequency system in Fig. 2 can be applied to the NR SUL scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n80 frequency band. Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the control circuit controls the first phase-locked loop 204 to be in the working state, and makes the first phase-locked loop 204 generate a first analog signal corresponding to the n80 frequency band. The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The control circuit can also control the second phase-locked loop 208 to be in the working state, and make the second phase-locked loop 208 generate the first analog signal corresponding to the n80 frequency band. The second mixer 205 can mix the second signal based on the first analog signal provided by the second phase-locked loop 208, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207 , so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with the same frequency band.

When the radio frequency system is switched from the dual transmission state of the same frequency band to the dual transmission state of different frequency bands, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band . The control circuit controls the working state of the second phase-locked loop 208 to generate a second analog signal corresponding to the n41 frequency band.

When the radio frequency system is in the state of dual transmission in different frequency bands, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the n41 frequency band. The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 finishes sending the first signal. The second mixer 205 performs mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, The second transmission circuit 21 completes sending the second signal, and the radio frequency system realizes sending two channels of signals with different frequency bands.

When the radio frequency system is switched from the dual-transmission state of different frequency bands to the dual-transmission state of the same frequency band, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band . The control circuit can control the working state of the second phase-locked loop 208 to generate the first analog signal corresponding to the n80 frequency band.

In yet another possible implementation, when the radio frequency system is in the state of dual transmission in the same frequency band or dual transmission in different frequency bands, the control circuit can control the first phase-locked loop 204 to keep outputting the first analog signal corresponding to the n80 frequency band, or not change the first analog signal corresponding to the frequency band n80. A phase-locked loop 204 generates the working state of the first analog signal corresponding to the n80 frequency band. When the radio frequency system is in the state of dual transmission in different frequency bands, the control circuit controls the second phase-locked loop 208 to be in the working state to generate a second analog signal corresponding to the n41 frequency band. When the radio frequency system is in the state of dual transmission in the same frequency band, the control circuit controls the second phase-locked loop 208 to be in a non-working state, such as controlling the second phase-locked loop 208 to stop generating the second analog signal. Specifically, the control circuit can control the power supply device that provides the driving voltage for the second phase-locked loop 208 to stop supplying power to the second phase-locked loop 208, so that the second phase-locked loop 208 stops generating the second analog signal due to no driving voltage. .

Exemplarily, when the radio frequency system is in the state of dual transmission in the same frequency band, the control circuit can control the first phase-locked loop 204 to generate a first analog signal corresponding to the n80 frequency band, and provide it to the first mixer 201 and the second mixer 205 . The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 sends the first signal. The second mixer 205 can mix the second signal based on the first analog signal provided by the first phase-locked loop 201, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207 , realizing that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with the same frequency band.

When the radio frequency system is switched from the same frequency band dual transmission state to the different frequency band dual transmission state, the control circuit may not change the working state of the first phase locked loop 204, so that the first phase locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band . The control circuit controls the second phase-locked loop 208 to be in the working state and generate a second analog signal corresponding to the n41 frequency band. The control circuit may also control the first analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205 .

When the radio frequency system is in the dual transmission state of different frequency bands, the control circuit can control the first phase-locked loop 204 to generate a first analog signal corresponding to the n80 frequency band. The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the n41 frequency band. The control circuit can also control the analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205, and the second mixer 205 can process the second signal based on the second analog signal provided by the second phase-locked loop 208. Mixing processing, the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with different frequency bands.

When the radio frequency system is switched from the dual-transmission state of different frequency bands to the dual-transmission state of the same frequency band, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band . The control circuit controls the second phase-locked loop 208 to be in a non-working state. The control circuit can also control the first analog signal generated by the first phase-locked loop 204 to provide to the second mixer 205 . The control circuit controls the second phase-locked loop 208 to be in a non-working state, such as controlling the second phase-locked loop 208 to stop generating the second analog signal. Specifically, the control circuit can control the power supply device that provides the driving voltage for the second phase-locked loop 208 The power supply to the second phase-locked loop 208 is stopped, and the second phase-locked loop 208 stops generating the second analog signal because there is no driving voltage.

In yet another example, when the radio frequency system is in a state of dual transmission in the same frequency band, the frequency band of the first signal and the frequency band of the second signal are both the first frequency band. When the radio frequency system is in the dual transmission state of different frequency bands, the frequency band of the first signal is the third frequency band, and the frequency band of the second signal is the second frequency band.

When the radio frequency system is in the state of dual transmission in the same frequency band, the control circuit controls the first phase-locked loop 204 to be in the working state, and makes the first phase-locked loop 204 generate a first analog signal corresponding to the first frequency band. The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The control circuit can also control the second phase-locked loop 208 to be in the working state, and make the second phase-locked loop 208 generate a first analog signal corresponding to the first frequency band. The second mixer 205 can mix the second signal based on the first analog signal provided by the second phase-locked loop 208, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207 , so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two channels of signals in the first frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the control circuit controls the working state of the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band. The control circuit controls the working state of the second phase-locked loop 208 to generate a second analog signal corresponding to the second frequency band.

When the radio frequency system is in the state of dual transmission in different frequency bands, the control circuit can control the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band, and control the second phase-locked loop 208 to generate a second analog signal corresponding to the second frequency band. The first mixer 201 can mix the first signal based on the third analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The second mixer 205 performs mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, By making the second transmission circuit 21 transmit the second signal, the radio frequency system realizes synchronously transmitting signals of the second frequency band and the third frequency band.

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the control circuit controls the working state of the first phase-locked loop 204 to generate a first analog signal corresponding to the first frequency band. The control circuit can control the working state of the second phase-locked loop 208 to generate the first analog signal corresponding to the first frequency band.

In yet another possible implementation manner, when the radio frequency system is in the state of dual transmission in the same frequency band, the control circuit controls the second phase-locked loop 208 to be in a non-working state, such as controlling the second phase-locked loop 208 to stop generating the second analog signal. The control circuit can also control the first phase-locked loop 204 to provide the first analog signal to the second mixer 205 . The control circuit can control the first phase-locked loop 204 to generate a first analog signal corresponding to the first frequency band, and provide it to the first mixer 201 and the second mixer 205 . The first mixer 201 can mix the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The second mixer 205 can mix the second signal based on the first analog signal provided by the first phase-locked loop 201, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207 , so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with the same frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the control circuit controls the working state of the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band. The control circuit controls the second phase-locked loop 208 to be in an operating state and generate a second analog signal corresponding to the second frequency band. The control circuit may also control the third analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205 .

When the radio frequency system is in the state of dual transmission in different frequency bands, the control circuit can control the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band. The first mixer 201 can mix the first signal based on the third analog signal provided by the first phase-locked loop 204, and the mixed signal is sent through the first power amplifying unit 202 and the first transceiver circuit 203 , so that the first transmission circuit 20 transmits the first signal. The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the second frequency band. The control circuit can also control the analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205, so that the second mixer 205 can compare the second signal to the second signal based on the second analog signal provided by the second phase-locked loop 208. Perform frequency mixing, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with different frequency bands.

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the control circuit controls the working state of the first phase-locked loop 204 to generate a first analog signal corresponding to the first frequency band. The control circuit controls the second phase-locked loop 208 to be in a non-working state. The control circuit can also control the first analog signal generated by the first phase-locked loop 204 to provide to the second mixer 205 . The control circuit controls the second phase-locked loop 208 to be in a non-working state, such as controlling the second phase-locked loop 208 to stop generating the second analog signal. Specifically, the control circuit can control the power supply device that provides the driving voltage for the second phase-locked loop 208 The power supply to the second phase-locked loop 208 is stopped, so that the second phase-locked loop 208 stops generating the second analog signal because there is no driving voltage.

Because the phase-locked loop cannot generate analog signals immediately after power-on. The PLL needs to be stable in order to continue to generate an analog signal. Therefore, when the control circuit controls the second phase-locked loop 208 to switch from the state of stopping generating analog signals to the state in which the second phase-locked loop 208 generates analog signals, the second transmission circuit 21 needs to wait for the second phase-locked loop 208 to stabilize, and then the second The second mixer 205 performs frequency mixing processing on the second signal according to the analog signal generated by the second phase-locked loop. Because the second phase-locked loop needs to be stable, the radio frequency system delays sending the second signal, and also increases the time for the radio frequency system to be in the state of dual transmission in different frequency bands.

In order to shorten the duration of the radio frequency system being in the state of dual transmission in different frequency bands, the control circuit may, when the first signal and the second signal are signals in different frequency bands, at the first moment before the input of the second signal at the input terminal 21A of the second transmission circuit 21, According to the frequency band of the second signal, the second phase-locked loop 208 is controlled to generate the second analog signal, wherein the second duration between the first moment and the moment when the second signal is input to the input terminal 21A of the second transmission circuit 21 is not less than the second lock Stabilization time of phase loop 208 .

Similarly, the working states of the power amplifying unit for amplifying and processing signals of different frequency bands are different. After switching the working state of the power amplifier unit, the signal cannot be amplified immediately. The power amplifying unit also needs to amplify the signal after stabilization. If the radio frequency system changes from the dual-transmitting state of the same frequency band to the dual-transmitting state of different frequency bands, the control circuit also needs to switch the working state of the second power amplifying unit 206 according to the frequency band of the second signal, and wait for the second power amplifying unit 206 to stabilize. The signal output by the second mixer 205 is amplified. The delay in sending the second signal by the radio frequency system also increases the time period for the radio frequency system to be in the state of dual transmission in different frequency bands. Since the second power amplifying unit 206 needs to be stable, the radio frequency system will also delay sending the second signal, which also increases the time for the radio frequency system to be in the state of dual transmission in different frequency bands.

The control circuit can also control the first signal at the second moment before the input terminal 21A of the second transmission circuit 21 inputs the second signal when the first signal and the second signal are signals of different frequency bands (the radio frequency system is in the state of dual transmission in different frequency bands). The second power amplifying unit 206 is in the working state of amplifying the second signal, wherein the first duration between the second moment and the moment when the second signal is input to the input terminal 21A of the second transmission circuit 21 is not less than the second power amplifying unit 206 for stabilization time.

For ease of expression, the second PLL 208 is denoted as TW1 (usually greater than 100 microseconds) by the second phase-locked loop 208 from the working state of stopping the output analog signal to the required stabilization time of switching to the working state of outputting the analog signal, and the second power amplification The stabilization time required for the unit 206 to switch from the working state corresponding to the first frequency band to the working state corresponding to the second frequency band is recorded as TW2 (usually greater than 200 microseconds).

The control circuit can switch the working state of the second phase-locked loop 208 and/or the second power amplifying unit 206 according to the preset switching mode, so as to shorten the time that the radio frequency system is in the dual transmission state of different frequency bands, and can also shorten the time when the radio frequency system is in the dual transmission state of different frequency bands. The switching time from the dual-transmitting state of the frequency band to the dual-transmitting state of the same frequency band.

In an example, the radio frequency system is applied to the NR SUL scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n80 frequency band. Take the signal as an example to illustrate the control or switching process of the control circuit.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the control circuit may control the second phase-locked loop 208 to generate the second analog signal at the first moment T1. The control circuit can also control the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band at the second time T2. The modulation and demodulation circuit provides the second signal of frequency band n41 to the input terminal 21A of the second transmission circuit 21 at the third time T3.

Wherein, both the first moment T1 and the second moment T2 are before the third moment T3, and the first duration Δt1 between the first moment T1 and the third moment T3 is not less than the stabilization time TW1 of the second PLL 208, The second duration Δt2 between the second moment T2 and the third moment T3 is not less than the stabilization time TW2 required for the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band. The control circuit controls the first switch 209 to be in the off state before the third time T3.

In an actual application scenario, the stabilization time for the second transceiver circuit 207 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band is relatively short, and usually the stabilization time required by the second transceiver circuit 207 after switching the working state is shorter than the second The stabilization time TW1 of the PLL 208 and the stabilization time TW2 of the second power amplifying unit 206 . The control circuit can control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band before the third time T3.

When the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the control circuit can control the second power amplifying unit 206 to switch from the working state corresponding to the n41 frequency band to the corresponding working state of the n80 frequency band at the fourth moment T4. The modulation and demodulation circuit provides the second signal of the frequency band n80 at the input terminal 21A of the second transmission circuit 21 at the fifth time T5. Wherein, the fourth moment T4 is before the fifth moment T5, and the third duration Δt3 between the fourth moment T4 and the fifth moment T5 is not less than the second power amplifying unit 206 switching from the working state corresponding to the n80 frequency band to the n41 frequency band The corresponding working state requires a stabilization time TW2. The control circuit may control the first analog signal generated by the first phase-locked loop 204 to provide to the second mixer 205 at the fifth time T5.

Usually, the stabilization time of the second transceiver circuit 207 from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band is relatively short, and is shorter than the stabilization time TW1 of the second phase-locked loop 208 and the stabilization time TW2 of the second power amplifying unit 206 . The control circuit can control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band at the fifth time T5.

It should be understood that, according to the settling time of the second phase-locked loop 208 and the stabilization time of the second power amplifying unit 206, the switching sequence of the working states of the second phase-locked loop 208 and the second power amplifying unit 206 can be controlled, so that the radio frequency can be shortened. The length of time that the system is in the dual transmission state of different frequency bands shortens the switching time of the radio frequency system from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band. During implementation, the control circuit can further set the switching timing of the working states of other components according to the performance or stabilization time of other components in the radio frequency system.

In a possible implementation manner, the control circuit in the radio frequency system provided by the embodiment of the present application may include a controller and a first switch 209, as shown in FIG. A schematic diagram of the connection relationship of the circuit 21. The first end of the first switch 209 is respectively connected with the second input end 201b of the first mixer 201 and the first phase-locked loop 204, and the second end of the first switch 209 is connected with the second input end of the second mixer 205 respectively. The input terminal 205b is connected to the second phase-locked loop 208 . When the control circuit controls the analog signal generated by the first phase-locked loop 204 to provide to the first mixer 201 and the second mixer 205 , it may be realized by controlling the first switch 209 to be in a conducting state by the controller. The controller controls the first switch 209 to be in an off state, which may mean that the analog signal generated by the first phase-locked loop 204 stops being provided to the second mixer 205 .

The modulation and demodulation circuit in the radio frequency system can be connected with the controller in the control circuit. In an example, the controller may learn that the first signal and the second signal are signals of different frequency bands or signals of the same frequency band through a feedback signal sent to it by the modulation and demodulation circuit. In yet another example, the controller may control the modulation and demodulation circuit to generate the first signal and the second signal, and input the first signal to the first transmission circuit 20 , and input the second signal to the second transmission circuit 21 .

The controller can control the first switch 209 to be in the off state when the first signal and the second signal are signals of different frequency bands (that is, the radio frequency system is in the state of dual transmission in different frequency bands), and control the first lock according to the frequency band of the first signal. The phase loop 204 generates a first analog signal, and the first analog signal generated by the first phase-locked loop 204 can be input to the first mixer 201 through a wire or a transmission line connected to the second input end 201b of the first mixer 201, the second A mixer 201 may perform frequency mixing processing on the first signal based on the first analog signal. Since the first switch 209 is in an open state, the circuit between the first phase-locked loop 204 and the second mixer 205 is disconnected, so the first analog signal generated by the first phase-locked loop 204 cannot be input into the second mixer 205. The second input terminal 205b.

The controller also controls the second phase-locked loop 208 to generate a second analog signal according to the frequency band of the second signal, and the second analog signal generated by the second phase-locked loop 208 can be connected to the second input terminal 205b of the second mixer 205 The wire or the transmission line is input to the second mixer 205, and the second mixer 205 can perform frequency mixing processing on the second signal based on the second analog signal. Since the first switch 209 is in an open state, the circuit between the second phase-locked loop 208 and the first mixer 201 is disconnected, so the second analog signal generated by the second phase-locked loop 208 cannot be input into the first mixer 201. The second input terminal 201b.

The controller controls the first switch 209 to be in an off state, so that the first mixer 201 can independently perform frequency mixing processing on the first signal according to the first analog signal generated by the first phase-locked loop 204, and also make the second mixer The processor 205 can independently perform frequency mixing processing on the second signal according to the second analog signal generated by the second phase-locked loop 208 . The signal mixed by the first mixer 201 is sent through the first power amplifying unit 202 and the first transceiver circuit 203 . The signal mixed by the second mixer 205 is sent through the second power amplifying unit 206 and the second transceiver circuit 207 . Realize that the radio frequency system sends signals in different frequency bands synchronously.

The controller can also control the first switch 209 to be in the conduction state (or closed state) when the first signal and the second signal are signals of the same frequency band (that is, the radio frequency system is in the dual transmission state of the same frequency band), then the first The phase-locked loop 204 is connected to the second input terminal 205 b of the second mixer 205 , and the second phase-locked loop 208 is connected to the second input terminal 201 b of the first mixer 201 . The controller may select a phase-locked loop from the two phase-locked loops to provide the first mixer 201 and the second mixer 205 with an analog third analog signal, wherein the third analog signal is the same as the first signal and the second signal The frequency bands have a corresponding relationship.

For example, the controller selects the first phase-locked loop 204 from the two phase-locked loops and makes it in the working state, controls the first phase-locked loop 204 to generate a third analog signal according to the frequency bands of the first signal and the second signal and provides it to the second A mixer 201 and a second mixer 205 . The controller controls the second phase-locked loop 205 to be in a non-working state, so that the second phase-locked loop 205 cannot provide analog signals for the first mixer 201 and the second mixer 205 .

The first mixer 201 can mix the first signal according to the third analog signal generated by the first phase-locked loop 204, and the second mixer 205 can mix the first signal according to the third analog signal generated by the first phase-locked loop 204. The second signal is subjected to frequency mixing processing. The signal mixed by the first mixer 201 is sent through the first power amplifying unit 202 and the first transceiver circuit 203 . The signal mixed by the second mixer 205 is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the radio frequency system can synchronously send signals of the same frequency band.

For another example, the controller selects the second phase-locked loop 208 from the two phase-locked loops and makes it in the working state, and controls the second phase-locked loop 208 to generate a third analog signal according to the frequency bands of the first signal and the second signal to provide The first mixer 201 and the second mixer 205 . The controller controls the first phase-locked loop 204 to be in a non-working state, so that the first phase-locked loop 204 cannot provide analog signals for the first mixer 201 and the second mixer 205 .

The first mixer 201 can mix the first signal according to the third analog signal generated by the second phase-locked loop 208, and the second mixer 205 can mix the first signal according to the third analog signal generated by the second phase-locked loop 208. The second signal is subjected to frequency mixing processing. The signal mixed by the first mixer 201 is sent through the first power amplifying unit 202 and the first transceiver circuit 203 . The signal mixed by the second mixer 205 is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the radio frequency system can synchronously send signals of the same frequency band.

If the radio frequency system is in the dual transmission state of the same frequency band, the controller controls one of the first phase-locked loop 204 and the second phase-locked loop 208 to be in the working state, and the other phase-locked loop is in the non-working state. Controlling the first phase-locked loop 204 to be in the working state and controlling the second phase-locked loop 208 to be in the non-working state is an example. When the controller controls the second phase-locked loop 208 to be in a non-working state, the power supply device that provides the drive voltage for the second phase-locked loop 208 can be controlled to stop supplying power to the second phase-locked loop 208, so that the second phase-locked loop 208 stops generating The second analog signal can also be understood as turning off the second phase-locked loop 208, which can reduce the power consumption of the radio frequency system.

In an example, the radio frequency system in Fig. 3 can be applied to the NR SUL scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n80 frequency band. Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the controller controls the first switch 209 to be in the conduction state, so that the conduction between the first phase-locked loop 204 and the second input terminal 205b of the second mixer 205 is conducted. The controller controls the first phase-locked loop 204 to output the first analog signal, controls the second phase-locked loop 208 to stop generating the second analog signal, or controls the second analog signal generated by the second phase-locked loop 208 not to be provided to the second mixer 205. The controller controls the working state of the first power amplifying unit 202 to be the working state corresponding to the n80 frequency band, and controls the working state of the first transceiver circuit 203 to be the working state corresponding to the n80 frequency band. The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n80 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

When the radio frequency system is switched from the dual-transmission state of the same frequency band to the dual-transmission state of different frequency bands, the controller controls the first switch 209 to be in the off state, controls the second phase-locked loop 208 to output the second analog signal or controls the second phase-locked loop 208 to be in the Working state, controlling the working state of the second power amplifying unit 206 to be the working state corresponding to the n41 frequency band, and controlling the working state of the second transceiver circuit 207 to be the working state corresponding to the n41 frequency band.

In one example, when the radio frequency system is in the dual transmission state of different frequency bands, the second analog signal output by the second phase-locked loop 208 is used as the signal formed by the second mixer 205, the second power amplifying unit 206, and the second transceiver circuit 207 The local oscillator source of the transmit path. The first analog signal output by the first phase-locked loop 204 serves as the local oscillator source of the signal transmission path formed by the first mixer 201 , the first power amplifying unit 202 , and the first transceiver circuit 203 .

It should be noted that the controller may not switch the working states of the first phase-locked loop 204 , the first power amplifying unit 202 and the first transceiver circuit 203 . The first phase-locked loop 204 can keep outputting the first analog signal, the working state of the first power amplifying unit 202 keeps the working state corresponding to the n80 frequency band, and the working state of the first transceiver circuit 203 keeps the working state corresponding to the n80 frequency band. In the process of switching the radio frequency system from the same-frequency band dual transmission state to the different frequency band dual transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, Avoid the situation that the first signal is interrupted due to switching to the dual-transmitting state of different frequency bands in the existing radio frequency system.

When the radio frequency system is switched from the dual-transmission state of different frequency bands to the dual-transmission state of the same frequency band, the controller controls the second phase-locked loop 208 to stop generating the second analog signal or controls the second phase-locked loop 208 to be in a non-working state, and controls the first switch 209 In the closed state, control the working state of the second power amplifying unit 206 to be the working state corresponding to the n80 frequency band, and control the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

In one example, when the radio frequency system is in the state of dual transmission in the same frequency band, the first analog signal output by the first phase-locked loop 204 is used as the signal formed by the first mixer 201, the first power amplifying unit 202, and the first transceiver circuit 203 The local oscillator source of the transmit path. The first analog signal output by the first phase-locked loop 204 also serves as the local oscillator source of the signal transmission path formed by the second mixer 205 , the second power amplifying unit 206 and the second transceiver circuit 207 .

In a possible implementation manner, the second phase-locked loop 208 needs some stabilization time TW1 (usually greater than 100 microseconds) from the working state of stopping outputting the second analog signal to the working state of outputting the second analog signal, and the second It takes a stabilization time TW2 (usually greater than 200 microseconds) for the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band.

The controller can switch the working state of the second phase-locked loop 208 and/or the second power amplifying unit 206 according to the preset switching mode, so as to shorten the time that the radio frequency system is in the dual transmission state of different frequency bands, and can also shorten the time when the radio frequency system is in the state of different frequency bands. The switching time from the dual-transmitting state of the frequency band to the dual-transmitting state of the same frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller may control the second phase-locked loop 208 to generate the second analog signal at the sixth time T6. The controller may also control the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band at the seventh time T7. The modulation and demodulation circuit provides the second signal of frequency band n41 to the input terminal 21A of the second transmission circuit 21 at the eighth time T8.

Wherein, both the sixth moment T6 and the seventh moment T7 are before the eighth moment T8, and the fourth duration Δt4 between the sixth moment T6 and the eighth moment T8 is not less than the stabilization time TW1 of the second phase-locked loop 208, The fifth duration Δt5 between the seventh time T7 and the eighth time T8 is not less than the stabilization time TW2 required for the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band. The controller controls the first switch 209 to be in the off state before the eighth time T8.

In an actual application scenario, the stabilization time for the second transceiver circuit 207 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band is relatively short, and usually the stabilization time required by the second transceiver circuit 207 after switching the working state is shorter than the second The stabilization time TW1 of the PLL 208 and the stabilization time TW2 of the second power amplifying unit 206 . The controller may control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band before the eighth time T8.

When the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the controller can control the second power amplifying unit 206 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band at the ninth moment T9. The modulation and demodulation circuit provides the second signal of the frequency band n80 at the input terminal 21A of the second transmission circuit 21 at the tenth time T10. Wherein, the ninth moment T9 is before the tenth moment T10, and the sixth time length Δt6 between the ninth moment T9 and the tenth moment T10 is not less than the second power amplifying unit 206 switching from the working state corresponding to the n80 frequency band to the n41 frequency band The corresponding working state requires a stabilization time TW2. The controller may control the first switch 209 to be in the on state before the fifth moment.

Usually, the stabilization time of the second transceiver circuit 207 from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band is relatively short, and is shorter than the stabilization time TW1 of the second phase-locked loop 208 and the stabilization time TW2 of the second power amplifying unit 206 . The controller may control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band before the tenth time T10.

It should be understood that, according to the settling time of the second phase-locked loop 208 and the stabilization time of the second power amplifying unit 206, the switching sequence of the working states of the second phase-locked loop 208 and the second power amplifying unit 206 can be controlled, so that the radio frequency can be shortened. The length of time that the system is in the dual transmission state of different frequency bands shortens the switching time of the radio frequency system from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band. During the implementation process, the controller can further set the switching timing of the working states of other components according to the performance or stabilization time of other components in the radio frequency system.

The control circuit in the radio frequency system provided by the embodiment of the present application may further include a second switch 501 , and FIG. 5 shows a schematic diagram of the connection relationship between the second switch 501 and the first transmission circuit 20 and the second transmission circuit 21 . Wherein, the first end of the second switch 501 is connected to the second PLL 208 , and the second end of the second switch 501 is respectively connected to the second input end 205 b of the second mixer 205 and the second end of the first switch 209 .

The controller may control the second switch 501 to be in an off state, so that the analog signal generated by the second phase-locked loop 208 cannot be provided to any mixer, so as to control the second phase-locked loop 208 to be in a non-working state. If the radio frequency system is in the state of dual transmission in different frequency bands, the controller can control the second switch 501 to be in a conducting state, so that the second phase-locked loop 208 forms a path with the second input terminal 205b of the second mixer 205, and the second lock The analog signal generated by the phase loop 208 may be provided to the second mixer 205 . The controller may not control the second phase-locked loop 208 to stop the second analog signal, or close the second phase-locked loop 208, and the second phase-locked loop 208 may maintain the working state of generating the second analog signal without switching the second phase-locked loop In the working state of 208, there is no need to wait for the second phase-locked loop 208 to be stable, so as to prevent the radio frequency system from delaying the transmission of the second signal, and shorten the time when the radio frequency system is in the dual transmission state of different frequency bands.

In an example, the radio frequency system in Fig. 5 can be applied to the NR SUL scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n80 frequency band. Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the same-frequency dual transmission state, the controller controls the first switch 209 to be in the on state, and the second switch 501 to be in the off state, so that the second input of the first phase-locked loop 204 and the second mixer 205 conduction between terminals 205b. The controller controls the first phase-locked loop 204 to output the first analog signal, and controls the second phase-locked loop 208 to output the second analog signal. The controller controls the working state of the first power amplifying unit 202 to be the working state corresponding to the n80 frequency band and controls the working state of the first transceiver circuit 203 to be the working state corresponding to the n80 frequency band. The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n80 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

In a possible implementation manner, when the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller controls the first switch 209 to be in the off state, and controls the second switch 501 to be in the on state, so that the first The second PLL 208 is connected to the second input terminal 205 b of the second mixer 205 . The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n41 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n41 frequency band.

It should be understood that the controller may not switch the working states or working states of the first phase-locked loop 204 , the first power amplifying unit 202 and the first transceiver circuit 203 . So that the first phase-locked loop 204 can keep the working state of generating the first analog signal, the working state of the first power amplifying unit 202 keeps the working state corresponding to the n80 frequency band, and the working state of the first transceiver circuit 203 keeps the working state corresponding to the n80 frequency band . In the process of switching the radio frequency system from the same-frequency band dual transmission state to the different frequency band dual transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, This prevents the interruption of sending the first signal due to switching to the dual-transmission state of different frequency bands in the existing radio frequency system.

In yet another possible implementation, when the radio frequency system is switched from the same-frequency dual transmission state to the different-frequency dual transmission state, the controller controls the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band at the eleventh time T11 It is the working state corresponding to the n41 frequency band. The modulation and demodulation circuit provides the second signal of frequency band n41 to the input terminal 21A of the second transmission circuit 21 at the twelfth time T12. Wherein, the eleventh moment T11 is before the twelfth moment T12, and the seventh duration Δt7 between the eleventh moment T11 and the twelfth moment T12 is not less than the working state of the second power amplifying unit 206 corresponding to the n80 frequency band Switching to the working state corresponding to the n41 frequency band requires a stabilization time TW2. The controller controls the first switch 209 to be in the OFF state before the twelfth time T12, and controls the second switch 501 to be in the ON state before the twelfth time T12.

Since the second transceiver circuit 207 switches from the working state corresponding to the n80 frequency band to the corresponding working state of the n41 frequency band, the stabilization time is relatively short, usually the stabilization time is less than the stabilization time TW2 of the second power amplifying unit 206, the controller can be at the twelfth moment Before T12, the working state of the second transceiver circuit 207 is controlled to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band.

When the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the controller controls the second power amplifying unit 206 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band at the thirteenth time T13. The modulation and demodulation circuit provides the second signal of frequency band n80 to the input terminal 21A of the second transmission circuit 21 at the fourteenth time T14. Wherein, the thirteenth moment T13 is before the fourteenth moment T14, and the eighth duration Δt8 between the thirteenth moment T13 and the fourteenth moment T14 is not less than the working state corresponding to the n80 frequency band of the second power amplifying unit 206 Switching to the working state corresponding to the n41 frequency band requires a stabilization time of TW3. The controller controls the first switch 209 to be in the on state before the fourteenth time T14, and controls the second switch 501 to be in the off state before the fourteenth time T14.

The stabilization time for the second transceiver circuit 207 to switch from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band is relatively short, usually shorter than the stabilization time TW2 of the second power amplifying unit 206 . The controller may control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band before the fourteenth time T14.

In an actual application scenario, the function of the second switch 501 may also be implemented by a switch circuit. A switch circuit is shown in FIG. 6 , including a SPDT switch 502 and a ground terminal. Wherein, the fixed terminal 502c of the SPDT switch 502 is connected with the second phase-locked loop 208, the first contact terminal 502a is connected with the ground terminal, and the second contact terminal 502b is connected between the first switch 209 and the second mixer 205 any node of . Wherein, a load, such as a resistor and other components, may also be connected between the first contact end 502a and the ground end.

When the controller controls the switch circuit, the controller controls the fixed end 502c of the SPDT switch and the second contact end 502b to be in a conduction state, which is the same as that of the above-mentioned embodiment where the controller controls the second switch 501 to be in a conduction state. The effect or contribution of the system is the same. The controller controls the connection between the fixed end 502c of the SPDT switch and the first contact end 502a, and the effect or contribution to the radio frequency system by controlling the second switch 501 to be in the off state by the controller in the above embodiment is same. The controller controls the fixed end 502c of the SPDT switch and the first contact end 502a to be in a conduction state. If the second phase-locked loop 208 is in the working state of generating an analog signal, the analog signal generated by the second phase-locked loop 208 It can flow to the ground terminal through the path formed by the fixed terminal 502c of the SPDT switch and the first contact terminal 502a.

In yet another possible implementation manner, the second signal may be sent through different power amplification units and transceiver circuits. As shown in FIG. 7, the second transmission circuit 20 in the radio frequency system provided by the embodiment of the present application may also include a third switch 601, a third power amplifying unit 602, and a third transceiver circuit 603. The third power amplifying unit 602 is connected to the Three transceiver circuits 603 .

The third switch 601 is a SPDT switch, the fixed end 601c of the third switch 601 is connected to the output end 205c of the second mixer 205, the first contact end 601a of the third switch 601 is connected to the second power amplifying unit 206, The second contact terminal 601b of the third switch 601 is connected to the third power amplifying unit 602 .

The control circuit can control the fixed terminal 601c of the third switch 601 and the first contact terminal 601a to be in a conduction state when the first signal and the second signal are signals of different frequency bands, so that the signal output by the second mixer 205 provides to the second power amplifying unit 206. The control circuit can also control the fixed terminal 601c of the third switch 601 and the second contact terminal 601b to be in a conduction state when the first signal and the second signal are signals of the same frequency band, so that the signal output by the second mixer 205 Provided to the third power amplifying unit 602.

Exemplarily, the third power amplifying unit 602 may include a register, a front-end switch, at least one power amplifier, and at least one filter. The third power amplification unit 602 is connected to a third transceiver circuit 603 including at least one antenna.

In an example, the radio frequency system in Fig. 7 can be applied to the NR CA scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n1 frequency band; when the radio frequency system is in the state of dual transmission in different frequency bands, the first signal is the signal in the n1 frequency band, and the second signal is in the n78 frequency band Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the controller controls the first switch 209 to be in a closed state, so that the first phase-locked loop 204 and the second input terminal 205 b of the second mixer 205 are conducted. The controller controls the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b, so that the circuit between the output terminal 205c of the second mixer 205 and the third power amplifying unit 602 is conducted. The controller controls the first phase-locked loop 204 to generate the fourth analog signal corresponding to the n1 frequency band, and controls the second phase-locked loop 208 to stop generating the fifth analog signal corresponding to the n78 frequency band. The controller controls the working state of the first power amplifying unit 202 to be the working state corresponding to the n1 frequency band, and controls the working state of the first transceiver circuit 203 to be the working state corresponding to the n1 frequency band. The controller controls the working state of the third power amplifying unit 602 to be the working state corresponding to the n1 frequency band, and controls the working state of the third transceiver circuit 603 to be the working state corresponding to the n1 frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller controls the first switch 209 to be in the off state. The controller controls the conduction between the fixed terminal 601c of the third switch 601 and the first contact terminal 601a, so as to conduct the circuit between the output terminal 205c of the second mixer 205 and the second power amplifying unit 206 . The controller controls the second phase-locked loop 208 to output the fifth analog signal, controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n78 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n78 frequency band .

It should be understood that the controller may not switch the working states or working states of the first phase-locked loop 204 , the first power amplifying unit 202 and the first transceiver circuit 203 . The first phase-locked loop 204 can maintain the working state of outputting the fourth analog signal, the first power amplifying unit 202 can maintain the working state corresponding to the n1 frequency band, and the first transceiver circuit 203 can maintain the working state corresponding to the n1 frequency band. In the process of switching the radio frequency system from the same-frequency band dual transmission state to the different frequency band dual transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, This prevents the interruption of sending the first signal due to switching to the dual-transmission state of different frequency bands in the existing radio frequency system.

When the radio frequency system is switched from the dual-transmission state of different frequency bands to the dual-transmission state of the same frequency band, the controller controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 not to work, and controls the first switch 209 is in a closed state. The controller controls the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b, so that the circuit between the output terminal 205c of the second mixer 205 and the third power amplifying unit 602 is conducted. The control circuit switches the on-off state of the fixed end 601c of the third switch 601 in the second transmission circuit 21 and each contact end, and switches the signal input after the mixing process of the second mixer 205 to correspond to the frequency band of the second signal The power amplifier unit and the transceiver circuit. Moreover, because the control circuit does not need to switch the working state of the second power amplifying unit 206, and does not need to wait for the stabilization time after the working state of the power amplifying unit changes, the time length for the radio frequency system to be in the state of dual transmission in different frequency bands is shortened, and the radio frequency system is shortened by The switching time for switching from the dual-transmission state on different frequency bands to the dual-transmission state on the same frequency band.

In a possible implementation manner, it takes a stabilization time TW1 for the second phase-locked loop 208 to switch from the working state of stopping outputting the fifth analog signal to the working state of generating the fifth analog signal. The controller switches the state of the second phase-locked loop 208 according to the preset switching mode, shortens the time for waiting for the second phase-locked loop 208 to be stable, shortens the time for the radio frequency system to be in the state of dual transmission in different frequency bands, and shortens the time for the radio frequency system to switch from different frequency bands. The duration for switching from dual transmission status in the same frequency band to dual transmission status in the same frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller may control the second phase-locked loop 208 to generate the fifth analog signal at the fifteenth time T15. The modulation and demodulation circuit provides the second signal of frequency band n78 to the input terminal 21A of the second transmission circuit 21 at the sixteenth time T16. Wherein, the fifteenth time T15 is before the sixteenth time T16 , and the ninth duration Δt9 between the fifteenth time T15 and the sixteenth time T16 is not less than the stabilization time TW1 of the second PLL 208 . The controller controls the first switch 209 to be in the off state before the sixteenth time T16. Before the sixteenth time T16, the controller controls the fixed terminal 601c of the third switch 601 to conduct with the first contact terminal 601a, so that the output terminal 205c of the second mixer 205 is conducted with the second power amplifying unit 206 .

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of frequency band n1 to the input terminal 21A of the second transmission circuit 21 at the seventeenth time T17. The controller may control the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b before the seventeenth time T17, so that the output terminal 205c of the second mixer 205 is conducted with the third power amplifying unit 602. Before the seventeenth time T17, the controller controls the first switch 209 to be in a conducting state, controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 to not work.

In one example, when the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the controller can control the second power amplifying unit 206 to be in a non-working state, or close the second power amplifying unit 206 to reduce the radio frequency power consumption of the circuit.

Exemplarily, when the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller may control the second phase-locked loop 208 to generate the fifth analog signal at the eighteenth moment T18, and at the nineteenth At time T19, the second power amplifying unit 206 is controlled to be in the working state corresponding to the n78 frequency band. The modulation and demodulation circuit provides the second signal of frequency band n78 to the input terminal 21A of the second transmission circuit 21 at the twentieth time T20. Wherein, both the eighteenth moment T18 and the nineteenth moment T19 are before the twentieth moment T20, and the tenth time period Δt10 between the eighteenth moment T18 and the twentieth moment T20 is not less than the second phase-locked loop 208 The stabilization time TW1 of the 19th time T19 and the twentieth time T20 between the eleventh time period Δt11 is not less than the stabilization time TW2 of the second power amplifying unit 206 . The controller controls the first switch 209 to be in the off state before the twentieth time T20. The controller controls the fixed terminal 601c of the third switch 601 to conduct with the first contact terminal 601a before the twentieth time T20, so that the output terminal 205c of the second mixer 205 is conducted with the second power amplifying unit 206.

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of frequency band n1 to the input terminal 21A of the second transmission circuit 21 at the twenty-first time T21. The controller controls the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b before the twenty-first time T21, so that the output terminal 205c of the second mixer 205 and the third power amplifying unit 602 Form a pathway. Before the twenty-first time T21, the controller controls the first switch 209 to be in a conducting state, controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 to not work. The controller may not turn off the second power amplifying unit 206 to avoid waiting for the time required for the second power amplifying unit 206 to stabilize.

The controller can also turn off the second power amplifying unit 206, so that the second power amplifying unit 206 does not work, and reduces the power consumption of the radio frequency system. Exemplarily, the controller controls the second power amplifying unit 206 not to work, which may be implemented as controlling the components that supply power to the second power amplifying unit 206 to stop supplying power to the second power amplifying unit 206 .

In an example, the control circuit in the radio frequency system may further include a second switch 501, as shown in FIG. 8, the second input terminal 201b of the second mixer 205 in the second transmission circuit A second switch 501 is arranged between them.

In an example, the radio frequency system in Fig. 8 can be applied to the NR CA scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n1 frequency band; when the radio frequency system is in the state of dual transmission in different frequency bands, the first signal is the signal in the n1 frequency band, and the second signal is in the n78 frequency band Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the controller controls the first switch 209 to be in the closed state, and the first phase-locked loop 204 and the second input terminal 205 b of the second mixer 205 are conducted. The controller controls the second switch 501 to be in the off state, and the circuit between the second phase-locked loop 208 and the second input terminal 205b of the second mixer 205 is disconnected. The controller controls the conduction between the fixed end 601c of the third switch 601 and the second contact end 601b, and a path is formed between the output end 205c of the second mixer 205 and the third power amplifying unit 602 . The controller controls the first phase-locked loop 204 to generate a fourth analog signal. The controller controls the working state of the first power amplifying unit 202 to be the working state corresponding to the n1 frequency band, and controls the working state of the first transceiver circuit 203 to be the working state corresponding to the n1 frequency band. The controller controls the working state of the third power amplifying unit 602 to be the working state corresponding to the n1 frequency band, and controls the working state of the third transceiver circuit 603 to be the working state corresponding to the n1 frequency band. After controlling the second phase-locked loop 208 to generate the fifth analog signal, the controller does not change the working state of the second phase-locked loop 208, and adjusts the second The analog signal received by the second input terminal 205b of the mixer 205 .

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the modulation and demodulation circuit provides the second signal of the n78 frequency band to the input terminal 21A of the second transmission circuit 21 . The controller controls the first switch 209 to be in an off state. The controller controls the second switch 501 to be in a conducting state, and the fifth analog signal generated by the second phase-locked loop 208 is input to the second input terminal 205 b of the second mixer 205 . The controller controls the fixed terminal 601c of the third switch 601 to conduct with the first contact terminal 601a, so that the output terminal 205c of the second mixer 205 is conducted with the second power amplifying unit 206 . The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n78 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n78 frequency band.

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of frequency band n1 to the input terminal 21A of the second transmission circuit 21 . The controller controls the second switch 501 to be in the off state, controls the first switch 209 to be in the on state, and the fourth analog signal generated by the first phase-locked loop 204 is input to the second input terminal 205 b of the second mixer 205 . The controller controls the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b, so that the circuit between the output terminal 205c of the second mixer 205 and the third power amplifying unit 602 is conducted.

In a possible implementation manner, the controller may control the working state of the first power amplifying unit 202 to be the working state corresponding to the n1 frequency band, and control the working state of the first transceiver circuit 203 to be the working state corresponding to the n1 frequency band. The controller can control the working state of the third power amplifying unit 602 to be the working state corresponding to the n1 frequency band, and control the working state of the third transceiver circuit 603 to be the working state corresponding to the n1 frequency band. The controller can control the working state of the second power amplifying unit 206 to be the working state corresponding to the frequency band n78, and control the working state of the third transceiver circuit 603 to be the working state corresponding to the n78 frequency band. After the controller controls the working states of each power amplifying unit and the transceiver circuit, by controlling the first switch 209, the second switch 501, and the third switch 601, it realizes controlling the radio frequency system between the dual-transmission state of different frequency bands and the dual-transmission state of the same frequency band. switch between.

Exemplarily, when the radio frequency system is switched from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the modulation and demodulation circuit provides the second signal of the n78 frequency band to the input terminal 21A of the second transmission circuit 21 at the twenty-second time T22. Signal. Before the twenty-second time T22, the controller controls the first switch 209 to be in the off state, controls the second switch 501 to be in the on state, and controls the fixed end 601c of the third switch 601 to be in conduction with the first contact end 601a , make the output terminal 205c of the second mixer 205 conduct with the second power amplifying unit 206 .

When the radio frequency system is switched from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of frequency band n1 to the input terminal 21A of the second transmission circuit 21 at the twenty-third time T23. Before the twenty-third time T23, the controller controls the first switch 209 to be in the on state, controls the second switch 501 to be in the off state, and controls the fixed terminal 601c of the third switch 601 to conduct with the second contact terminal 601b , make the output end 205c of the second mixer 205 conduct with the third power amplifying unit 602 .

As shown in FIG. 9 , the control circuit in the radio frequency system provided by the embodiment of the present application may include a fourth switch 801 , a fifth switch 802 , a sixth switch 803 , a third mixer 804 , and a controller. The radio frequency system provided in the embodiment of the present application may also be applied to a radio frequency system in a 3Tx transmission scenario.

The first terminal of the fourth switch 801 is respectively connected to the input terminal 21A of the second transmission circuit 21 and the first terminal of the fifth switch 802, and the second terminal of the fourth switch 801 is connected to the first input terminal 804a of the third mixer 804 , the second end of the fifth switch 802 is connected to the first input end 804a of the second mixer 205, and the second input end 804b of the third mixer 804 is respectively connected to the first phase-locked loop 204 and the first mixer 201 The second input terminal 201b.

The sixth switch 803 is a single-pole double-throw switch, the fixed end 803c of the sixth switch 803 is connected to the second power amplifying unit 206, the first contact end 803a of the sixth switch 803 is connected to the output end of the third mixer 804, The second contact terminal 803b of the sixth switch 803 is connected to the output terminal 205c of the second mixer 205 .

The controller can also control the fourth switch 801 to be in the off state, control the fifth switch 802 to be in the on state, and control the connection between the fixed terminal 803c of the sixth switch 803 and the first signal when the first signal and the second signal are signals of different frequency bands. The second contact terminal 803b of the six-switch 803 is in a conducting state, so that the signal output by the second mixer 205 is provided to the second power amplifying unit 206 .

The controller can also control the fourth switch 801 to be in the on state, control the fifth switch 802 to be in the off state, and control the connection between the fixed end 803c of the sixth switch 803 and the first signal when the first signal and the second signal are signals of the same frequency band. The first contact terminal 803 a of the six-switch 803 is in a conducting state, so that the signal output by the third mixer 804 is provided to the second power amplifying unit 206 .

The input terminal and output terminal of the third mixer 804 are denoted as the first input terminal 804a, the second input terminal 804b, and the output terminal 804c of the third mixer 804, respectively. The first input terminal 804 a of the third mixer 804 is connected to the fourth switch 801 . The second input terminal 804b of the third mixer 804 is connected to the output terminal of the first phase-locked loop 204 . The output terminal 804c of the third mixer 804 is connected to the first contact terminal 803a of the sixth switch 803 . The third mixer 804 is used to mix the second signal received by the first input terminal 804a and the analog signal output by the first phase-locked loop 204 received by the second input terminal 804b, and pass the processed signal through the output The terminal 804c is input to the second power amplifying unit 206 through the sixth switch 803 .

The second input 205 b of the second mixer 205 is connected to the fifth switch 802 . The fifth output terminal 205c of the second mixer 205 is connected to the second contact terminal 803b of the sixth switch 803 . The second mixer 205 is used to mix the analog signal output by the second phase-locked loop 208 received by the first input terminal 205a and the input signal received by the second input terminal 205b, and pass the processed signal through the second mixer. The output terminal 205c of the inverter 205 is input to the second power amplifying unit 206 through the sixth switch 803 .

In an example, the radio frequency system in Fig. 9 can be applied to the NR SUL scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n80 frequency band. Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the controller controls the first switch 209 to be in the conduction state, so that the conduction between the first phase-locked loop 204 and the second input terminal 205b of the second mixer 205 is conducted. The controller controls the first phase-locked loop 204 to output the first analog signal, controls the second phase-locked loop 208 to stop generating the second analog signal, or controls the second phase-locked loop 208 to not work. The controller controls the working state of the first power amplifying unit 202 to be the working state corresponding to the n80 frequency band, and controls the working state of the first transceiver circuit 203 to be the working state corresponding to the n80 frequency band. The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n80 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

The first analog signal generated by the first phase-locked loop 204 is used as the local oscillator source of the signal transmission path formed by the third mixer 804, the second power amplifying unit 206 and the second transceiver circuit 207, and the 201. A local oscillator source of a signal transmission path formed by the first power amplifying unit 202 and the first transceiver circuit 203.

When the radio frequency system is switched from the same frequency band dual transmission state to the different frequency band dual transmission state, the controller controls the fixed end of the sixth switch 803 to conduct with the second contact end 803b, and the fifth output end 205c of the second mixer 205 is connected to the second contact end 803b. A path is formed between the second power amplifying units 206 . The controller controls the fourth switch 801 to be in the off state, and controls the fifth switch 802 to be in the on state, so that the second signal provided by the modulation and demodulation circuit to the input terminal 21A of the second transmission circuit 21 is input to the second mixer 205, and the third mixer 804 has no signal input. The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n41 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n41 frequency band.

In one example, when the radio frequency system is in the dual transmission state of different frequency bands, the second analog signal generated by the second phase-locked loop 208 is used as the signal formed by the second mixer 205, the second power amplifying unit 206, and the second transceiver circuit 207 The local oscillator source of the transmit path. The first analog signal output by the first phase-locked loop 204 serves as the local oscillator source of the signal transmission path formed by the first mixer 201 , the first power amplifying unit 202 , and the first transceiver circuit 203 .

When the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the controller controls the connection between the fixed terminal 803c of the sixth switch 803 and the first contact terminal 803a to be in a conduction state, and the output of the third mixer 804 A path is formed between the end 804c and the second power amplifying unit 206 . The controller controls the fourth switch 801 to be in the on state, and controls the fifth switch 802 to be in the off state, so that the second signal provided by the modulation and demodulation circuit to the input terminal 21A of the second transmission circuit 21 is input to the third mixer 804, and the second mixer 205 has no signal input. The controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n80 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

It should be understood that the controller may not switch the working state or the working state of the first phase-locked loop 204 , the first power amplifying unit 202 and the first transceiver circuit 203 . The first phase-locked loop 204 can maintain the working state of generating the first analog signal, the first power amplifying unit 202 can maintain the working state corresponding to the n80 frequency band, and the first transceiver circuit 203 can maintain the working state corresponding to the n80 frequency band. The modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously send the first signal, so as to avoid the interruption of the transmission of the first signal due to switching to the dual transmission state of different frequency bands in the existing radio frequency system.

In another possible implementation manner, when the radio frequency system switches from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller controls the second phase-locked loop 208 to generate the second analog signal at the twenty-fourth time T24. At the twenty-fifth time T25, the controller controls the second power amplifying unit 206 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band. The modulation and demodulation circuit provides the second signal of the n41 frequency band to the input terminal 21A of the second transmission circuit 21 at the twenty-sixth time T26.

Wherein, both the twenty-fourth moment T24 and the twenty-fifth moment T25 are before the twenty-sixth moment T26, and the twelfth time length Δt12 between the twenty-fourth moment T24 and the twenty-sixth moment T26 is not less than The stabilization time TW1 of the second phase-locked loop 208, the thirteenth duration Δt13 between the twenty-fifth moment T25 and the twenty-sixth moment T26 is not less than the second power amplifying unit 206 is switched from the working state corresponding to the n80 frequency band to The working state corresponding to the n41 frequency band requires a stabilization time TW2.

Before the twenty-sixth time T26, the controller controls the fourth switch 801 to be in the off state, controls the fifth switch 802 to be in the on state, and controls the second contact between the fixed terminal 803c of the sixth switch 803 and the sixth switch 803. The dot terminal 803c is turned on.

The second transceiver circuit 207 is switched from the working state corresponding to the n80 frequency band to the corresponding working state of the n41 frequency band, and the stabilization time is shorter, and the stabilization time is usually shorter than the stabilization time TW1 of the second phase-locked loop 208 and the stabilization time of the second power amplifying unit 206 TW2. The controller may control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n80 frequency band to the working state corresponding to the n41 frequency band before the twenty-sixth time T26.

In an example, the on-off state of the sixth switch 803 also needs a certain stabilization time, assuming that the stabilization time of the sixth switch 803 is TW3. The controller may control the fixed terminal of the sixth switch 803 to conduct with the second contact terminal 803c of the sixth switch 803 at the twenty-seventh time T27. The twenty-seventh time T27 is before the twenty-sixth time T26 , and the fourteenth time period Δt14 between the twenty-seventh time T27 and the nineteenth time is not less than the stabilization time TW3 of the sixth switch 803 .

When the radio frequency system is switched from the dual transmission state of different frequency bands to the dual transmission state of the same frequency band, the controller controls the second power amplifying unit 206 to switch from the working state corresponding to the n41 frequency band to the corresponding working state of the n80 frequency band at the twenty-eighth moment T28 . The modulation and demodulation circuit provides the second signal of frequency band n80 to the input terminal 21A of the second transmission circuit 21 at the twenty-ninth time T29. Wherein, the twenty-eighth moment T28 is before the twenty-ninth moment T29, and the fifteenth duration Δt15 between the twenty-eighth moment T28 and the twenty-ninth moment T29 is not less than the second power amplifying unit 206 by n80 The working state corresponding to the frequency band is switched to the stabilization time TW2 of the working state corresponding to the n41 frequency band. Before the twenty-ninth time T29, the controller controls the fourth switch 801 to be in the closed state, the fifth switch 802 to be in the open state, and controls the fixed end 803c of the sixth switch 803 and the first contact end 803a of the sixth switch 803 between them is in conduction state.

The second transceiver circuit 207 is switched from the working state corresponding to the n41 frequency band to the corresponding working state of the n80 frequency band, and the stabilization time is relatively short, usually the stabilization time is less than the stabilization time TW1 of the second phase-locked loop 208 and the stabilization time of the second power amplifying unit 206 TW2. The controller may control the working state of the second transceiver circuit 207 to switch from the working state corresponding to the n41 frequency band to the working state corresponding to the n80 frequency band before the twenty-ninth time T29.

As shown in Figure 10, the second transmission circuit in the radio frequency system provided by the embodiment of the present application may further include a seventh switch 901, an eighth switch 902, a fourth mixer 903, a fourth power amplifying unit 904, and a fourth transceiver The circuit 905 and the fourth power amplifying unit 904 are connected to the fourth transceiver circuit 905 . The radio frequency system provided in the embodiment of the present application may also be applied to a radio frequency system in a 3Tx transmission scenario.

The first end of the seventh switch 901 is respectively connected to the input end 21A of the second transmission circuit 21 and the first end of the eighth switch 902, and the second end of the seventh switch 901 is connected to the first input end of the fourth mixer 903 903a, the second end of the eighth switch 902 is connected to the first input end 205a of the second mixer 205, and the second input end 903b of the fourth mixer 903 is respectively connected to the first phase-locked loop 204 and the first mixer The second input terminal 201b of 201 and the output terminal of the fourth mixer 903 are connected to the fourth power amplifying unit 904 .

The control circuit can also control the seventh switch 901 to be in the off state and the eighth switch 902 to be in the on state when the first signal and the second signal are signals of different frequency bands, so that the second signal is input into the second signal via the eighth switch 902. Two mixers 205 . The control circuit can also control the seventh switch 901 to be in the on state and the eighth switch 902 to be in the off state when the first signal and the second signal are signals of the same frequency band, so that the second signal is input into the second signal through the seventh switch 901. Quad mixer 903 . In practical application scenarios, the control circuit can be implemented as a controller.

In an example, the radio frequency system in Fig. 10 can be applied to the NR CA scenario. When the radio frequency system is in the state of dual transmission in the same frequency band, the first signal and the second signal are both signals in the n1 frequency band; when the radio frequency system is in the state of dual transmission in different frequency bands, the first signal is the signal in the n1 frequency band, and the second signal is in the n78 frequency band Taking the signal as an example, the workflow of the RF system is introduced.

When the radio frequency system is in the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of the n1 frequency band to the input terminal 21A of the second transmission circuit 21 . The controller controls the seventh switch 901 to be in the on state, the eighth switch 902 to be in the off state, and the modulation and demodulation circuit inputs the second signal of the n1 frequency band to the input terminal 21A of the second transmission circuit 21, which can be input to the The fourth mixer 903 and the eighth switch 902 are in the off state, so that the second mixer 205 cannot receive the second signal of the n1 frequency band.

The control circuit controls the first phase-locked loop 204 to generate the third analog signal, and the first phase-locked loop 204 can provide the third analog signal for the first mixer 201 and the fourth mixer 903 . The control circuit controls the working state of the fourth power amplifying unit 904 to be the working state corresponding to the frequency band n1, and controls the working state of the fourth transceiver circuit 905 to be the working state corresponding to n1. The fourth power amplifying unit 904 amplifies the signal output from the fourth mixer 903, and then the fourth transceiver circuit 905 transmits the amplified signal to complete the transmission of the second signal in the n1 frequency band.

When the radio frequency system is switched from the state of dual transmission in the same frequency band to the dual transmission state of different frequency bands, the controller controls the seventh switch 901 to be in the off state, and the input terminal 21A of the second transmission circuit 21 and the first input of the fourth mixer 903 The circuit between terminals 903a is disconnected, so that the fourth mixer 903 receives the second signal. The controller controls the eighth switch 902 to be in a conducting state, and the connection between the input terminal 21A of the second transmission circuit 21 and the first input terminal 205a of the second mixer 205 is conducted, so that the second mixer 205 receives the second signal .

It should be understood that the controller may not switch the working states of the first phase-locked loop 204 , the first power amplifying unit 202 and the first transceiver circuit 203 . The first phase-locked loop 204 can keep outputting the third analog signal, the working state of the first power amplifying unit 202 is kept corresponding to the n1 frequency band, and the working state of the first transceiver circuit 203 is kept corresponding to the n1 frequency band. In the process of switching the radio frequency system from the same-frequency band dual transmission state to the different frequency band dual transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, This prevents the interruption of sending the first signal due to switching to the dual-transmission state of different frequency bands in the existing radio frequency system.

When the radio frequency system is in the state of dual transmission in different frequency bands, the controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n78 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n78 frequency band. In order to reduce the power consumption of the radio frequency system, the controller may control to turn off the fourth power amplifying unit 904 , and may also control to turn off the fourth transceiver circuit 905 .

When the radio frequency system is switched from the dual-transmission state of different frequency bands to the dual-transmission state of the same frequency band, the controller controls the seventh switch 901 to be in the on state, and the input terminal 21A of the second transmission circuit 21 and the first A path is formed between the input terminals 903a, so that the fourth mixer 903 receives the second signal. The controller controls the eighth switch 902 to be in the off state, and the circuit between the input terminal 21A of the second transmission circuit 21 and the first input terminal 205a of the second mixer 205 is disconnected, so that the second mixer 205 cannot receive the second signal . The controller can also control the working state of the fourth power amplifying unit 904 to be the working state corresponding to the n1 frequency band, and control the working state of the fourth transceiver circuit 905 to be the working state corresponding to the n1 frequency band.

In yet another possible implementation manner, when the radio frequency system switches from the state of dual transmission in the same frequency band to the state of dual transmission in different frequency bands, the controller controls the second phase-locked loop 208 to generate a fourth analog signal at the thirtieth time T30. The modulation and demodulation circuit provides the second signal of frequency band n78 to the input terminal 21A of the second transmission circuit 21 at the thirty-first time T31. Wherein, the thirtieth moment T30 is before the thirtieth moment T30, and the sixteenth duration Δt16 between the thirtieth moment T30 and the thirty-first moment T31 is not less than the stabilization time TW1 of the second PLL 208 . Before the thirty-first time T31, the controller controls the seventh switch 901 to be in an open state, and controls the eighth switch 902 to be in a closed state.

When the radio frequency system switches from the state of dual transmission in different frequency bands to the state of dual transmission in the same frequency band, the modulation and demodulation circuit provides the second signal of frequency band n1 to the input terminal 21A of the second transmission circuit 21 at the thirty-second time T32. The controller may control the eighth switch 902 to be in an open state and control the seventh switch 901 to be in a closed state before the thirty-second time T32. The controller can also control the working state of the fourth power amplifying unit 904 to be the working state corresponding to the n1 frequency band at the thirty-third time T33, wherein the thirty-third time T33 is before the thirty-second time T32, and the thirty-third time T33 The seventeenth time period Δt17 between the time T33 and the thirty-second time T32 is not less than the stabilization time of the fourth power amplifying unit 904 .

The embodiment of the present application also provides a communication device 1000. Referring to FIG. 11, the communication device 1000 may include the aforementioned radio frequency system. The communication apparatus 1000 may be implemented as a terminal, such as a smart phone, a tablet computer, a notebook computer, etc., and of course may also be a network device, such as a base station, an access point (Access Point, AP) and the like.

In one example, FIG. 12 shows a terminal 1100, including a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, and a power management module 141, battery 142, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, A display screen 194, a subscriber identification module (subscriber identification module, SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, bone conduction sensor 180M, etc.

The first transmission circuit 20 and the second transmission circuit 21 in the radio frequency system provided in the embodiment of the present application may be integrated into the mobile communication module 150 . The mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied on the terminal 1100 . The first transmission circuit 20 and the second transmission circuit 21 in the radio frequency system provided by the embodiment of the present application may also be integrated in the wireless communication module 160 . The wireless communication module 160 can provide wireless local area network (wireless local area networks, WLAN) (such as Wi-Fi network), Bluetooth (bluetooth, BT), global navigation satellite system (global navigation satellite system, GNSS) applied on the electronic device 100. ), frequency modulation (frequency modulation, FM), near field communication (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The control circuit in the radio frequency system provided in the embodiment of the present application may be set in the processor 110 .

In another example, FIG. 13 shows a schematic structural diagram of a communication device 1300 . The communication apparatus 1300 may be a chip, a network device (such as a base station), or other network devices.

The communication device 1300 includes one or more processors 1301 , a transceiver unit 1302 and an antenna 1303 . The processor 1301 may be a general-purpose processor or a special-purpose processor. For example, it may be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process data of software programs.

The transceiving unit 1302 may include all or part of the circuit structure of any radio frequency system mentioned above, and is used to implement signal transceiving functions through the antenna 1303, such as the function of transmitting signals in different frequency bands. The radio frequency system provided in the embodiment of the present application may also be called a transceiver or a transceiver.

In a possible design, the communications device 1300 may include one or more memories 1304 . Optionally, data may also be stored in the memory. Optionally, instructions and/or data may also be stored in the processor. For example, instructions to control radio frequency systems. The processor and memory can be set separately or integrated together.

Based on the same technical idea, this application also provides a radio frequency system control method, which is applied to a radio frequency system. The radio frequency system includes a first transmission circuit 20 and a second transmission circuit 21. The first transmission circuit includes a first phase-locked loop 204, and the second The transmission circuit 20 includes a second phase locked loop 208 . In an example, the controller can execute the control method to control the radio frequency system. As shown in Figure 14, the control method may include the following steps:

Step S1401, if it is determined that the first signal input to the first transmission circuit and the second signal input to the second transmission circuit are signals of different frequency bands.

Step S1402, controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit uses the first analog signal to perform frequency mixing processing on the first signal.

Step S1403, controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, so that the second transmission circuit uses the second analog signal to perform frequency mixing processing on the second signal.

In a possible implementation, if the controller determines that the first signal and the second signal are signals of the same frequency band, control any one of the first phase-locked loop 204 and the second phase-locked loop 208 to generate A third analog signal. The controller provides the third analog signal to the first transmission circuit 20 and the second transmission circuit 21, so that the first transmission circuit 20 uses the third analog signal to perform frequency mixing processing on the first signal, and makes the second transmission circuit 21 use the first The three analog signals perform frequency mixing processing on the second signal.

In a possible implementation manner, the second transmission circuit 21 in the radio frequency system may further include a second power amplifying unit 206 . If the controller determines that the first signal and the second signal are signals of the same frequency band, the second power amplifying unit 206 is controlled to be in a working state of amplifying signals of the same frequency band according to the same frequency band.

If the controller determines that the first signal and the second signal are signals of different frequency bands, at the first moment before the second signal is input to the input terminal 21A of the second transmission circuit 21, the second power amplifying unit 206 is controlled according to the frequency band of the second signal In the working state of amplifying the second signal, the first duration between the first moment and the moment when the second signal is input is not less than the stabilization time of the second power amplifying unit 206 .

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-mentioned controller can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here.

Based on the above embodiments, the present application further provides a computer storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer executes the radio frequency system control method provided in the above embodiments.

An embodiment of the present application further provides a computer program product, including instructions, which, when run on a computer, cause the computer to execute the radio frequency control method provided in the above embodiments.

This application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if the modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application also intends to include these modifications and variations.

Claims (14)

1. A radio frequency system, comprising a first transmission circuit, a second transmission circuit and a control circuit; The first transmission circuit includes a first mixer, a first power amplifying unit, and a first transceiver circuit connected in sequence, the first input end of the first mixer is connected to the input end of the first transmission circuit, The second input terminal of the first mixer is connected to the first phase-locked loop; The second transmission circuit includes a second mixer, a second power amplifying unit, and a second transceiver circuit connected in sequence, the first input end of the second mixer is connected to the input end of the second transmission circuit, The second input end of the second mixer is connected to a second phase-locked loop; The control circuit is configured to, when the first signal input to the input terminal of the first transmission circuit and the second signal input to the input terminal of the second transmission circuit are signals of different frequency bands, according to the first signal The frequency band of the first phase-locked loop is controlled to generate a first analog signal to be provided to the first mixer, and the second phase-locked loop is controlled to generate a second analog signal to be supplied to the frequency band of the second signal Describe the second mixer. 2. The radio frequency system according to claim 1, wherein the control circuit is also used for: When the first signal and the second signal are signals of the same frequency band, control one of the first phase-locked loop and the second phase-locked loop to be in the working state, and the other phase-locked loop to be in the non-working state. working status; The phase-locked loop in the working state is controlled according to the same frequency band to generate third analog signals and provide them to the first mixer and the second mixer respectively. 3. The radio frequency system according to claim 2, wherein the control circuit comprises a controller and a first switch; The first end of the first switch is respectively connected to the second input end of the first mixer and the first phase-locked loop, and the second end of the first switch is respectively connected to the second mixer The second input terminal of the device is connected to the second phase-locked loop; The controller is configured to control the first switch to be in an off state when the first signal and the second signal are signals of different frequency bands, and control the first switch according to the frequency band of the first signal. a phase-locked loop generates a first analog signal, and inputs the first analog signal into the first mixer; and controls the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, and inputting the second analog signal into the second mixer; when the first signal and the second signal are signals of the same frequency band, controlling the first switch to be in a conduction state, according to the same The phase-locked loop in the working state of frequency band control generates a third analog signal, and the third analog signal is respectively provided to the mixers connected to the phase-locked loop in the non-working state through the first switch. 4. The radio frequency system according to claim 3, wherein the phase-locked loop in the working state is the first phase-locked loop, and the control circuit also includes a second switch; The first terminal of the second switch is connected to the second phase-locked loop, and the second terminal of the second switch is respectively connected to the second input terminal of the second mixer and the second input terminal of the first switch. end; The controller is specifically configured to control the second switch to be in an on state when the first signal and the second signal are signals of different frequency bands; when the first signal and the second signal When it is a signal of the same frequency band, the second switch is controlled to be in an off state. 5. The radio frequency system according to any one of claims 1-4, wherein the second transmission circuit further comprises a third switch, a third power amplifying unit and a third transceiver circuit, and the third power amplifying The unit is connected to the third transceiver circuit; The third switch is a single-pole double-throw switch, the fixed end of the third switch is connected to the output end of the second mixer, and the first contact end of the third switch is connected to the second power amplifier unit, the second contact end of the third switch is connected to the third power amplifying unit; The control circuit is further configured to control the fixed end of the third switch and the first contact end to be in a conduction state when the first signal and the second signal are signals of different frequency bands, so that The signal output by the second mixer is provided to the second power amplifying unit; when the first signal and the second signal are signals in the same frequency band, control the fixed terminal of the third switch and the The second contact terminal is in a conduction state, so that the signal output by the second mixer is provided to the third power amplifying unit. 6. The radio frequency system according to claim 1, wherein the control circuit comprises a fourth switch, a fifth switch, a sixth switch, a third mixer, and a controller; The first end of the fourth switch is respectively connected to the input end of the second transmission circuit and the first end of the fifth switch, and the second end of the fourth switch is connected to the first input of the third mixer terminal, the second terminal of the fifth switch is connected to the first input terminal of the second mixer, and the second input terminal of the third mixer is respectively connected to the first phase-locked loop and the first mixer frequency converter; The sixth switch is a single-pole double-throw switch, the fixed end of the sixth switch is connected to the second power amplifying unit, and the first contact end of the sixth switch is connected to the output of the third mixer terminal connection, the second contact terminal of the sixth switch is connected to the output terminal of the second mixer; The controller is specifically configured to, when the first signal and the second signal are signals of different frequency bands, control the fourth switch to be in the off state, control the fifth switch to be in the on state, and control The fixed end of the sixth switch is in a conduction state with the second contact end of the sixth switch, so that the signal output by the second mixer is provided to the second power amplifying unit; When the first signal and the second signal are signals in the same frequency band, control the fourth switch to be in the on state, control the fifth switch to be in the off state, and control the fixed terminal of the sixth switch to be connected to the first The first contact end of the six switches is in a conduction state, so that the signal output by the third mixer is provided to the second power amplifying unit. 7. The radio frequency system according to claim 1, wherein the second transmission circuit further comprises a seventh switch, an eighth switch, a fourth mixer, a fourth power amplifying unit and a fourth transceiver circuit, the The fourth power amplifying unit is connected to the fourth transceiver circuit; The first end of the seventh switch is respectively connected to the input end of the second transmission circuit and the first end of the eighth switch, and the second end of the seventh switch is connected to the first end of the fourth mixer. input terminal, the second terminal of the eighth switch is connected to the first input terminal of the second mixer, and the second input terminal of the fourth mixer is respectively connected to the first phase-locked loop and the first a mixer, the output end of the fourth mixer is connected to the fourth power amplifying unit; The control circuit is further configured to control the seventh switch to be in the off state and the eighth switch to be in the on state when the first signal and the second signal are signals of different frequency bands, so that The second signal is input to the second mixer through the eighth switch; when the first signal and the second signal are signals in the same frequency band, controlling the seventh switch to be in a conducting state, and controlling the eighth switch to be in an off state, so that the second signal is input to the fourth mixer through the seventh switch. 8. The radio frequency system according to any one of claims 1 to 4, 6, and 7, wherein the control circuit is specifically used for: When the first signal and the second signal are signals of different frequency bands, at the first moment before the second signal is input to the input terminal of the second transmission circuit, the frequency band of the second signal is used to control the The second phase-locked loop generates the second analog signal, wherein the second duration between the first moment and the moment when the second signal is input to the input terminal of the second transmission circuit is not less than the second The stabilization time of the phase-locked loop. 9. The radio frequency system according to any one of claims 1 to 4, 6, and 7, wherein the control circuit is also used for: When the first signal and the second signal are signals of different frequency bands, at a second moment before the second signal is input to the input terminal of the second transmission circuit, the second power amplifying unit is controlled to be in a pair The working state where the second signal is amplified, wherein the first duration between the second moment and the moment when the second signal is input to the input terminal of the second transmission circuit is not less than the second power amplification The stabilization time of the unit. 10. A radio frequency system control method, characterized in that it is applied to a radio frequency system, the radio frequency system includes a first transmission circuit and a second transmission circuit, the first transmission circuit includes a first phase-locked loop, and the second transmission circuit The transmission circuit includes a second phase-locked loop, and the method includes: If it is determined that the first signal input to the first transmission circuit and the second signal input to the second transmission circuit are signals of different frequency bands; controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit uses the first analog signal to perform frequency mixing processing on the first signal; The second phase-locked loop is controlled according to the frequency band of the second signal to generate a second analog signal, so that the second transmission circuit uses the second analog signal to perform frequency mixing processing on the second signal. 11. The method of claim 10, further comprising: If it is determined that the first signal and the second signal are signals in the same frequency band, control any one of the first phase-locked loop and the second phase-locked loop to generate a third phase-locked loop according to the same frequency band. analog signal; providing the third analog signal to the first transmission circuit and the second transmission circuit, causing the first transmission circuit to perform frequency mixing processing on the first signal using the third analog signal, and causing the The second transmission circuit uses the third analog signal to perform frequency mixing processing on the second signal. 12. The method according to claim 10 or 11, wherein the second transmission circuit further comprises a second power amplifying unit, and the method further comprises: If it is determined that the first signal and the second signal are signals of the same frequency band, controlling the second power amplifying unit to be in a working state of amplifying signals of the same frequency band according to the same frequency band; If it is determined that the first signal and the second signal are signals of different frequency bands, at the first moment before the second signal is input to the input terminal of the second transmission circuit, according to the frequency band control of the second signal The second power amplifying unit is in the working state of amplifying the second signal, wherein the first duration between the first moment and the moment when the second signal is input is not less than the second power Settling time of the amplification unit. 13. The method according to claim 10 or 11, wherein the controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal comprises: At a second moment before the input terminal of the second transmission circuit inputs the second signal, the second phase-locked loop is controlled according to the frequency band of the second signal to generate a second analog signal, wherein the second The second duration between the moment and the moment when the second signal is input is not less than the second phase-locked loop stabilization time. 14. A communication device, comprising the radio frequency system according to any one of claims 1-9.

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