WO2018018578A1

WO2018018578A1 - Vector-based modulation apparatus and modulation method

Info

Publication number: WO2018018578A1
Application number: PCT/CN2016/092220
Authority: WO
Inventors: 张科峰
Original assignee: 武汉芯泰科技有限公司
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2018-02-01

Abstract

Disclosed are a vector-based modulation apparatus and modulation method. The vector-based modulation apparatus comprises a configuration unit for receiving user configuration information, so as to map a digital signal into a corresponding vector signal; and a table lookup unit for storing the digital signal, the corresponding vector signal and the mapping relationship therebetween in the form of a lookup table, and further for searching for the lookup table according to the input digital signal and outputting the corresponding vector signal. In the present application, a signal modulation method is made configurable by means of a configuration unit and a table lookup unit; in addition, a digital signal is mapped into a vector signal, so that phase modulation and amplitude modulation can be implemented at the same time. Therefore, the modulation method of the present application is compatible with any existing modulation method, comprising rectangular QAM, heart-shaped QAM, PSK, ASK, etc.

Description

Description: A vector-based modulation device and modulation method

[0001] The present invention relates to the field of modulation technologies, and in particular, to a vector-based modulation apparatus and a modulation method.

Background technique

[0002] The so-called digital modulation is a process of controlling a carrier's parameters with a digital baseband signal to be transmitted to vary with the digital baseband signal. Digital modulation is to adapt the baseband signal to be transmitted for channel transmission. There are many types of digital modulation, mainly digital amplitude modulation (digital amplitude modulation), digital frequency modulation (digital frequency modulation), and digital phase modulation (digital phase modulation). Since the digital baseband signal can only take discrete finite values, the corresponding carrier parameters can only take discrete finite values. The modulated signal can be regarded as the result of switching the carrier of different parameters by the digital baseband signal. This implementation method is called keying method. Therefore, the above three basic digital modulation methods are generally referred to as ASK (Amplitude Shift Keying), FSK (Frequency Shift Keying), and PSK (Phase Shift Keying). Based on the basic digital modulation method, QAM (Quadrature Amplitude Modulation) is derived, which is essentially a hybrid modulation of ASK and PSK.

[0003] In the prior art, regardless of the modulation method, the method of mapping from digital signals to modulation symbols is fixed, unprogrammable, and incompatible with each other. In the existing modulation technology, the relative positions between the constellation points in the constellation diagram are fixed, not programmable, and the constellation points cannot be randomly selected according to actual needs.

technical problem

[0004] In the prior art, regardless of the modulation method, the method of mapping from digital signals to modulation symbols is fixed, cannot be programmed, and is not compatible with each other. In the existing modulation technology, the relative positions between the constellation points in the constellation diagram are fixed, not programmable, and the constellation points cannot be randomly selected according to actual needs.

Problem solution

Technical solution

[0005] In view of the defects in the prior art that various modulation methods are not compatible with each other and are not programmable, the present invention provides a vector-based modulation apparatus and a modulation method. [0006] The technical solution proposed by the present invention with respect to the above technical problems is as follows:

In one aspect, a vector-based modulation apparatus is provided, including:

[0008] a configuration unit, configured to receive user configuration information to map the digital signal to a corresponding vector signal; and

And a lookup table unit, configured to store the digital signal, the corresponding vector signal and a mapping relationship thereof in the form of a lookup table, and to search the lookup table according to the input digital signal and output a corresponding vector signal.

[0010] Preferably, the vector signal is any vector signal in any quadrant of the constellation diagram, and is different in the constellation diagram.

[0011] Preferably, in the constellation diagram, the vector signals are independent of each other.

[0012] Preferably, the lookup table unit is a register.

[0013] In another aspect, a vector-based modulation method is further provided, including the following steps:

[0014] Sl, receiving user configuration information to map the digital signal to the corresponding vector signal;

[0015] S2: storing the digital signal, the corresponding vector signal, and a mapping relationship thereof in the form of a lookup table, and searching the lookup table according to the input digital signal and outputting a corresponding vector signal.

[0016] Preferably, the vector signal is any vector signal in any quadrant of the constellation diagram, and is different in the constellation diagram.

[0017] Preferably, in the constellation diagram, the vector signals are independent of each other.

[0018] Preferably, the lookup table is stored in a register.

Advantageous effects of the invention

Beneficial effect

The implementation of the embodiments of the present invention has the following beneficial effects: The present application makes the signal modulation mode configurable and programmable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that phase and amplitude can be simultaneously achieved. Modulation, so the modulation scheme of the present application is compatible with any existing modulation scheme, including rectangular QAM, cardioid QAM, PSK, and ASK.

Brief description of the drawing

DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a block diagram of a typical communication system according to an embodiment of the present invention;

2 is a schematic structural view of the modulation apparatus shown in FIG. 1;

3 is a flow chart of a modulation method provided by the present invention;

4a and 4b are schematic diagrams showing the structure of a constellation diagram provided by an embodiment of the present invention.

Embodiments of the invention

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

[0026] 诵信系统

1 is a typical block diagram of a communication system according to an embodiment of the present invention. The communication system 100 includes: a source encoding device 102, a channel encoding device 104, a modulating device 106, a channel 108, a demodulating device 110, a channel decrypting device 112, and a source encoding device 114. The source encoder 102 is configured to receive the source 151 to be transmitted. The source coding apparatus 102 is for encoding the source 151 and generating a source coded signal 152. Channel coding means 104 is operative to channel encode source coded signal 152 and to generate channel coded signal 153. Modulation means 106 is operative to modulate encoded signal 153 into signal 154 to be transmitted.

[0028] The to-be-transmitted signal 154 provides a receive signal 155 to the receiving end via channel 108. The channel 108 includes, but is not limited to, a microwave radio frequency link, a satellite channel, a fiber optic cable, a composite fiber optic cable system, or a copper cable. The channel 108 includes a propagation medium that introduces interference and distortion into the signal to be transmitted 154 such that the received signal 1 55 is different from the signal 154 to be transmitted. Interference and distortion include, but are not limited to, noise, attenuation, phase shift changes, etc.

[0029] The demodulation device 110 is configured to demodulate the received signal 155 into a demodulated signal 156. Channel decoding device 112 is operative to decode demodulated signal 156 into channel decoded signal 157. Source decoding device 114 is operative to further decode channel decode signal 157 into target signal 158. The target signal 158 is provided to one or more receiver user devices. The one or more receiver user devices include, but are not limited to, a personal computer, a digital terminal device, A telephone device, personal digital assistant, software application, or any other device that can send or receive data.

[0030] Modulation

2 is a schematic structural diagram of a modulation apparatus according to an embodiment of the present invention. The modulation device 106 includes a configuration unit 202 and a lookup table unit 204. The configuration unit 202 is configured to receive user configuration information 251 to map the digital signals to corresponding vector signals. The use of configuration unit 202 makes the mapping relationship of the present application programmable. Therefore, the user can select an appropriate vector signal according to actual needs and define an appropriate mapping relationship. In this way, the modulation apparatus provided by the present application can match all existing modulation modes, and can also perform modulation according to actual communication requirements by selecting the most suitable vector signal and mapping relationship. The lookup table unit 204 is configured to store the digital signal, the corresponding vector signal and its mapping relationship in the form of a lookup table, and is further configured to search the lookup table according to the input digital signal 153 and output a corresponding vector signal 154 (ie, a signal to be transmitted) ). It is selected to store the vector signal selected by the user and the defined mapping relationship in the form of a lookup table, so that the mapping relationship and the vector signal can be freely changed. In one embodiment of the invention, the mapping between the digital signal and the vector signal is a one-to-one mapping.

In one embodiment of the invention, as shown in Figures 4a and 4b, the vector signals A1~A8 may be any vector signals in any quadrant of the constellation diagram and are different in the constellation. As shown in Figure 4a, the vector signals Al~A8 can be selected from the same quadrant of the constellation. As shown in Figure 4b, the vector signals A1~A8 can also be selected from different quadrants of the constellation. However, whether it is from the same quadrant or from different quadrants, the vector signals A1~A8 are different in the constellation, so that the mapping between the digital signal and the vector signal is guaranteed to be one-to-one mapping.

[0033] In another embodiment provided by the present invention, as shown in Figures 4a and 4b, the vector signals A1~A8 are independent of each other, and there is no dependency between the vector signals. The user can select each vector signal in a targeted manner. It should be understood that the user can individually configure each vector signal according to actual needs so that there is a certain relationship between them. Thus, when it is necessary to be compatible with existing modulation schemes, vector signals can be configured to meet existing modulation schemes.

[0034] In one embodiment provided by the present invention, lookup table unit 204 is a register. The input digital signal 153 can be an address signal of the register, and the vector signal 154 corresponding to the digital signal 154 can be stored in a register. When a particular address signal 153 is input, the register 204 automatically outputs the vector signal 154 stored in the address. The correspondence between the address signal and the vector signal can be obtained by the configuration unit 202. Configuration.

[0035] The present application makes the signal modulation mode configurable and programmable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that the phase and amplitude modulation can be implemented simultaneously, so the modulation method of the present application can be compatible with any Existing modulation methods include rectangular QAM, heart-shaped QAM, PSK, and ASK.

[0036]

[0037] This embodiment provides a vector-based modulation method. As shown in FIG. 3, the vector-based modulation method can be applied to a modulation apparatus as described above, and the method can include the following steps:

[0038] Sl, receiving user configuration information to map the digital signal to a corresponding vector signal;

[0039] S2: storing the digital signal, the corresponding vector signal, and a mapping relationship thereof in the form of a lookup table, and searching the lookup table according to the input digital signal and outputting a corresponding vector signal.

[0041] In another embodiment provided by the present invention, as shown in Figures 4a and 4b, the vector signals A1~A8 are independent of each other, and there is no dependency between the vector signals. The user can select each vector signal in a targeted manner. It should be understood that the user can individually configure each vector signal according to actual needs so that there is a certain relationship between them. Thus, when it is necessary to be compatible with existing modulation schemes, vector signals can be configured to meet existing modulation schemes.

[0042] In one embodiment provided by the present invention, the lookup table is stored in a register. As shown in Table 1 below, the lookup table 1 contains the input digital signals, that is, the address signals 000 to 111 of the registers (assuming the address signals are 3 bits), and the vector signals A1 to A8 corresponding to the digital signals one by one. It should be understood that the number of bits of the address signal is only an example in this embodiment, and is not intended to limit the number of bits of the address signal. The number of bits of the address signal can be designed to satisfy any modulation method as needed. As shown in FIG. 2, when a specific address signal 153 is input, the register 204 automatically outputs the vector stored in the address according to the lookup table. Signal 154. The correspondence between the address signal and the vector signal can be configured by the configuration unit 202.

[] [Table 1]

[0043] The present application makes the signal modulation mode configurable and programmable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that the phase and amplitude modulation can be implemented simultaneously, so the modulation method of the present application can be compatible with any Existing modulation methods include rectangular QAM, heart-shaped QAM, PSK, and ASK.

The above disclosure is only a preferred embodiment of the present invention, and of course, the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and Equivalent variations of the claims of the invention are still within the scope of the invention.

Claims

Claim

[Claim 1] A vector-based modulation apparatus, comprising:

a configuration unit, configured to receive user configuration information to map the digital signal to a corresponding vector signal;

The lookup table unit is configured to store the digital signal, the corresponding vector signal and its mapping relationship in the form of a lookup table, and to search the lookup table according to the input digital signal and output a corresponding vector signal.

[Claim 2] The vector-based modulating apparatus according to claim 1, wherein the vector signal is an arbitrary vector signal in any quadrant of the constellation diagram, and is different in the constellation diagram.

[Claim 3] The vector-based modulating apparatus according to claim 2, wherein, in the constellation diagram, the vector signals are independent of each other.

[Claim 4] The modulating device according to claim 1, wherein the lookup table unit is

[Claim 5] A vector-based modulation method, comprising the steps of:

51. Receive user configuration information to map the digital signal to a corresponding vector signal;

52. Store the digital signal, the corresponding vector signal and its mapping relationship in the form of a lookup table, and search the lookup table according to the input digital signal and output a corresponding vector signal.

[Claim 6] The vector-based modulation method according to claim 5, wherein the vector signal is any vector signal in any quadrant of the constellation diagram, and is different in the constellation diagram.

[Claim 7] The vector-based modulation method according to claim 6, wherein in the constellation diagram, the vector signals are independent of each other.

[Claim 8] The vector-based modulation method according to claim 5, wherein the lookup table is stored in a register.