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WO2003043235A1 - Codulation de polarisation d'antenne - Google Patents

Codulation de polarisation d'antenne Download PDF

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Publication number
WO2003043235A1
WO2003043235A1 PCT/DK2001/000755 DK0100755W WO03043235A1 WO 2003043235 A1 WO2003043235 A1 WO 2003043235A1 DK 0100755 W DK0100755 W DK 0100755W WO 03043235 A1 WO03043235 A1 WO 03043235A1
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WO
WIPO (PCT)
Prior art keywords
modulation
signals
mpsk
polarizations
antenna polarization
Prior art date
Application number
PCT/DK2001/000755
Other languages
English (en)
Inventor
Jyoti Prasad
Dikshitulu Kalluri
Veronique Farserotu
Nunta Vanichsetakul
Original Assignee
Jyoti Prasad
Dikshitulu Kalluri
Veronique Farserotu
Nunta Vanichsetakul
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jyoti Prasad, Dikshitulu Kalluri, Veronique Farserotu, Nunta Vanichsetakul filed Critical Jyoti Prasad
Priority to PCT/DK2001/000755 priority Critical patent/WO2003043235A1/fr
Priority to EP01274689A priority patent/EP1444797A1/fr
Publication of WO2003043235A1 publication Critical patent/WO2003043235A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes
    • H04L1/006—Trellis-coded modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying

Definitions

  • the invention relates to a method for transmission of digital data signals according to the preamble of claim 1, a method for receiving digital data signals according to the preamble of claim 8, a system for transmission of digital data signals according to the preamble of claim 9, a transmitter for transmission of digital data signals according to the preamble of claim 14, a receiver for receiving transmitted signals according to the preamble of claim 21, a transceiver for transmitting and receiving digital data signals according to the preamble of claim 25 and uses according to claim 29 and 30.
  • MPSK modulation is employed in many wireless and mobile systems. Under ideal conditions, coherent MPSK is more power efficient than non-coherent, or differentially coherent modulation techniques. However, the wireless and mobile communication channels are not ideal. Fading is common and delay and delay variation may be significant. The overall performance benefit is a function of the improved bandwidth and power efficiency, as well as, the channel-error rate and delay and their influence on higher- level protocols, such as TCP/IP.
  • MPSK TCM offers bandwidth and power advantages over ordinary MPSK. It is especially interesting to users with small terminals, where bandwidth and power efficiency are at a premium. In addition to increasing the capacity in terms of the number of users that can be supported, the bandwidth efficiency of TCM may also facilitate the use of newer more bandwidth intensive multimedia applications. For example, over mobile satellite and wireless radio links, where the available bandwidth and power are limited. Indeed, it is currently employed in commercial satellite modems, such as INTELSAT.
  • One of the objectives of the present invention is to provide an improved method of and a system for performing communication, especially wireless and mobile communication. It is a further objective to provide such a method and a system with improved bandwidth and with a power efficient modulation.
  • the invention relates to a method of transmitting digital data signals whereby a modulation of the digital data signals is performed and whereby a coding by means of antenna polarization of the digital data signals is involved.
  • Antenna Polarization Codulation APC is a new technique that integrates antenna polarization and modulation into a new and inventive form of codulation.
  • said coding may involve a switching of antenna polarization between two different polarization values, whereby a polarization coding may be facilitated in an advantageous and relatively uncomplicated manner.
  • a switching of antenna polarization between at least three different polarization values may be performed.
  • said modulation may be of the M-nary Phase Shift Keying (MPSK)-type, in particular of the M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM)-type, whereby a modulation type generally available may be used.
  • MPSK TCM and in particular the "Pragmatic"- type is advantageous since it is relatively simple to implement and can be implemented using commercially readily available equipment.
  • the method according to the invention as specified in claim 1 may utilize a wide range of modulations and is not limited to MPSK, MPSK TCM or Pragmatic MPSK TCM.
  • said switching of antenna polarization may be determined by means of at least one bit of a digital package, e.g. a byte or a symbol, which bit may be coded or left unencoded by the modulation performed, whereby an advantageous embodiment is achieved.
  • said switching of antenna polarization may be determined by means of a most significant bit MSB, which may be coded or left unencoded by the modulation performed, whereby an advantageous embodiment is achieved.
  • said switching may be performed on the basis of a most significant bit MSB, which is left unencoded by the modulation performed, whereby a preferred simple embodiment is achieved.
  • MSB most significant bit
  • Other forms may be preferred dependent on whether the emphasis is on ease of implementation or performance.
  • a simple implementation will be described in the detailed description below. However, more sophisticated implementations are possible and may be advantageous where efficiency is at a premium.
  • said switching of antenna polarization may be determined by means of a least significant bit LSB, which may be coded or left unencoded by the modulation performed, whereby another advantageous embodiment is achieved.
  • the switching may be performed on the basis of MSB, LSB or any other bit(s), e.g. also on the basis of combinations of bits.
  • the choice will depend on ease of implementation vs. performance.
  • the selection of polarization need not be based on the unencoded bit.
  • Coded bit or bits may also be employed to select the polarization in a comprehensive implementation of antenna polarization codulation (e.g. multidimensional space-time-polarization coding scheme for use with MIMO (multiple input multiple output) antennas), but this may require special equipment, e.g. special codecs.
  • the invention also relates to a method of receiving digital data signals transmitted according to a method according to one or more of claims 1 - 7 whereby a decodulation of the received digital data is performed involving a decoding of the antenna polarization coding and a demodulation in accordance with the modulation involved.
  • the invention also relates to a system as specified in claim 9 for transmission of digital data signals comprising means for facilitating a modulation of the digital data signals to be transmitted and means for facilitating a switching of antenna polarization between at least two different polarizations.
  • Antenna Polarization Codulation APC is a new technique that integrates antenna polarization and modulation into a new and inventive form of codulation.
  • said system may comprise means for receiving transmitted signals, said means for receiving transmitted signals comprising means for performing a decodulation of said signals involving means for performing a decoding in dependence on antenna polarization of the received digital data and means for performing a demodulation in accordance with the modulation involved.
  • said means for performing a modulation and/or said means for performing a demodulation may operate according to a M-nary Phase Shift Keying (MPSK)-modulation type, in particular to a M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM)-type.
  • MPSK M-nary Phase Shift Keying
  • TCM Trellis Code Modulation
  • the system according to the invention may be constructed using a modulation type generally available.
  • the MPSK TCM, and in particular the "Pragmatic"- type is advantageous since it is relatively simple to implement and can be implemented using commercially readily available equipment.
  • system according to the invention as specified in claim 9 may utilize a wide range of modulations and is not limited to MPSK, MPSK TCM or Pragmatic MPSK TCM.
  • said means for transmitting signals and/or said means for receiving transmitted signals may comprise a number of antennas preferably corresponding to the number of polarizations utilized, whereby the system may be designed and constructed in an cost-effective and relatively uncomplicated manner.
  • said means for transmitting signals and/or said means for receiving transmitted signals may comprise an antenna facilitating transmission and/or reception of signals involving multiple polarizations, preferably corresponding to the number of polarizations utilized.
  • the invention further relates to a transmitter as specified in claim 14 for transmission of digital data signals comprising means for facilitating a modulation of the digital data signals to be transmitted and means for facilitating a switching of antenna polarization between at least two different polarizations.
  • said means for performing a modulation may be operating according to a M-nary Phase Shift Keying (MPSK)- modulation type, in particular to a M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM)-type.
  • MPSK M-nary Phase Shift Keying
  • TCM Trellis Code Modulation
  • the transmitter according to the invention may be constructed using a modulation type generally available.
  • the MPSK TCM, and in particular the "Pragmatic"-type is advantageous since it is relatively simple to implement and can be implemented using commercially readily available equipment.
  • the transmitter according to the invention as specified in claim 14 may utilize a wide range of modulations and is not limited to MPSK, MPSK TCM or Pragmatic MPSK TCM.
  • said switching of antenna polarization may be determined by means of at least one bit of a digital package, e.g. a byte or symbol, which bit may be coded or left unencoded by the modulation performed, whereby an advantageous embodiment is achieved.
  • said switching of antenna polarization may be determined by means of a most significant bit MSB, which may be coded or may be left unencoded by the modulation performed and which serves as or establishes a control input for a switching device, whereby an advantageous embodiment is achieved.
  • MSB most significant bit
  • said switching of antenna polarization may be determined by means of a least significant bit LSB, which may be coded or left unencoded by the modulation performed and which serves as or establishes a control input for a switching device, whereby another advantageous embodiment is achieved.
  • LSB least significant bit
  • the switching may be performed on the basis of MSB, LSB or any other bit(s), e.g. also on the basis of combinations of bits.
  • the choice will depend on ease of implementation vs. performance.
  • the selection of polarization need not be based on the unencoded bit.
  • Coded bit or bits may also be employed to select the polarization in a comprehensive implementation of antenna polarization codulation (e.g. multidimensional space-time-polarization coding scheme for use with MIMO (multiple input multiple output) antennas), but this may require special equipment, e.g. special codecs.
  • the transmitter may comprise a number of antennas preferably corresponding to the number of polarizations utilized, whereby the transmitter may be designed and constructed in an cost-effective and relatively uncomplicated manner.
  • the transmitter may comprise an antenna facilitating transmission of signals involving multiple polarizations, preferably corresponding to the number of polarizations utilized, whereby a further advantageous embodiment is achieved.
  • the invention also relates to a receiver for receiving transmitted signals, said receiver comprising means for performing a decodulation of said signals involving means for performing a decoding in dependence on antenna polarization of the received digital data and means for performing a demodulation in accordance with the modulation involved.
  • means for performing a demodulation may be operating according to a M-nary Phase Shift Keying (MPSK)-modulation type, in particular a M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM)- type.
  • MPSK M-nary Phase Shift Keying
  • TCM Trellis Code Modulation
  • the receiver according to the invention may be constructed using a modulation type generally available.
  • the MPSK TCM, and in particular the "Pragmatic"-type is advantageous since it is relatively simple to implement and can be implemented using commercially readily available equipment.
  • the receiver according to the invention as specified in claim 21 may utilize a wide range of demodulations and is not limited to MPSK, MPSK TCM or Pragmatic MPSK TCM.
  • said means for receiving transmitted signals may comprise a number of antennas corresponding to the number of polarizations utilized, whereby the receiver may be designed and constructed in an cost-effective and relatively uncomplicated manner.
  • said means for receiving transmitted signals may comprise an antenna facilitating reception of signals involving multiple polarizations, preferably corresponding to the number of polarizations utilized, whereby a further advantageous embodiment is achieved.
  • the invention also relates to a transceiver for transmitting and receiving digital data signals said transceiver comprising means for facilitating a modulation of the digital data signals to be transmitted, means for facilitating a switching of antenna polarization between at least two different polarizations and means for receiving transmitted signals, wherein said means for receiving transmitted signals comprises means for performing a decodulation of said signals involving means for performing a decoding in dependence on antenna polarization of the received digital data and means for performing a demodulation in accordance with the modulation involved.
  • said means for performing a modulation and/or said means for performing a demodulation may be operating according to a M-nary Phase Shift Keying (MPSK)-modulation type, in particular a M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM)-type.
  • MPSK M-nary Phase Shift Keying
  • TCM Trellis Code Modulation
  • the transceiver according to the invention may be constructed using a modulation type generally available.
  • the MPSK TCM, and in particular the "Pragmatic"-type is advantageous since it is relatively simple to implement and can be implemented using commercially readily available equipment.
  • the transceiver according to the invention as specified in claim 25 may utilize a wide range of modulations and is not limited to MPSK, MPSK TCM or Pragmatic MPSK TCM.
  • said means for transmitting signals and/or said means for receiving transmitted signals may comprise a number of antennas corresponding to the number of polarizations utilized, whereby the transceiver may be designed and constructed in an cost- effective and relatively uncomplicated manner.
  • said means for transmitting signals and/or said means for receiving transmitted signals may comprise an antenna facilitating transmission and/or reception of signals involving multiple polarizations, preferably corresponding to the number of polarizations utilized, whereby a further advantageous embodiment is achieved.
  • the invention relates to a use as specified in claim 29 of a method according to one or more of claims 1 - 8, a system according to one or more of claims 9 - 13, a transmitter according to one or more of claims 14 - 20, a receiver according to one or more of claims 21 - 24 and/or a transceiver according to one or more of claims 25 - 28 for wireless communication.
  • the invention relates to a use as specified in claim 30 of a method according to one or more of claims 1 - 8, a system according to one or more of claims 9 - 13, a transmitter according to one or more of claims 14 - 20, a receiver according to one or more of claims 21 - 24 and/or a transceiver according to one or more of claims 25 - 28 for wireless and mobile communication.
  • Antenna Polarization Codulation may be applied to a wide range of modulation schemes employed in wireless and mobile communication systems, such as, multiple phase shift keying (MPSK).
  • MPSK multiple phase shift keying
  • An example of the application of APC to MPSK Trellis Coded Modulation (TCM) is presented below along with an analysis of the potential performance improvement.
  • fig. 1 shows a schematic illustration of a system according to an embodiment of the invention
  • fig. 2 shows an embodiment of a transmitter for operating according to the
  • Antenna Polarization Codulation technique according to the invention and utilizing M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM), e.g. 8-PSK example as illustrated, fig. 3 illustrates an Antenna Polarization Codulation (APC) M-nary Phase
  • MPSK Shift Keying
  • TCM Trellis Code Modulation
  • APC Antenna Polarization Codulation technique
  • the method and the system according to the invention will initially be described in general terms with reference to figure 1 which generally shows a schematic illustration of a system according to an embodiment of the invention.
  • the system comprises a transmitter arrangement 1 and a receiver arrangement 2 for transmitting a signal 3.
  • the transmitter arrangement 1 comprises a modulation arrangement 4, which may utilize any suitable type of modulation, e.g. M-nary Phase Shift Keying (MPSK) Trellis Code Modulation (TCM).
  • MPSK Phase Shift Keying
  • TCM Trellis Code Modulation
  • the transmitter arrangement 1 comprises an antenna polarization device 5.
  • the receiver arrangement 2 comprises an antenna depolarization device 7 corresponding to the antenna polarization device 5 and a demodulator arrangement 8 corresponding to the modulation arrangement 4.
  • a signal 3 e.g. a digital data signal
  • a signal processing involving a modulation and an antenna polarization i.e. a codulation (coded modulation) is performed before the codulated signal 6 is transmitted to the receiver arrangement 2.
  • a decodulation is performed involving a depolarization and a demodulation leading to an output signal 9.
  • the transmitter arrangement 1 and the receiver arrangement 2 may both be designed as transceiver arrangements, whereby two-way communication may readily be established.
  • MPSK TCM M-nary Phase Shift Keying
  • TCM Trellis Code Modulation
  • Pragmatic MPSK TCM a form of MPSK TCM known as "Pragmatic" MPSK TCM is considered.
  • the "Pragmatic" MPSK TCM technique is generally available and is described for example in
  • the "Pragmatic" MPSK TCM is considered because it is relatively simple to implement and can be constructed using a commercial-off-the-shelf codec (coder- decoder).
  • coder- decoder coder- decoder
  • the application of APC to Pragmatic MPSK TCM is correspondingly simple.
  • the transmitter arrangement 10 comprises a TCM encoder 11 and an antenna polarization arrangement 12.
  • the TCM encoder 11 comprises as illustrated a demultiplexer 14, an encoder 15 and a MPSK mapping device 16.
  • the antenna polarization arrangement 12 comprises a switching device 18 and two antenna devices 19 and 20, each being designed for a specific polarization of the received signal, e.g. a right hand polarization and a left hand polarization.
  • a separate polarization per antenna has been employed.
  • multiple polarizations per antenna may be utilized as well, for example in certain advanced implementations.
  • multiple feeds per antenna capable of supporting more than one polarization per antenna are possible and embodiments comprising such arrangements are comprised within the scope of the application.
  • An input signal 21 in the form of an input bit stream is split into k-l separate parallel streams by the demultiplexer 14.
  • One bit stream is passed through the encoder 15, e.g. a standard convolutional encoder, while the remaining streams are passed unencoded through the TCM encoder 11.
  • the encoder e.g. a standard convolutional encoder
  • APC according to the invention increases the effective distance in signal space between channel symbols through the use of different antenna polarizations.
  • multiple polarizations e.g. involving 2, 3 4 or more different polarizations may be employed to further enhance performance (e.g., in the case of higher order MPSK TCM).
  • APC with polarization switching based on other than the MSB may be advantageous from a performance perspective.
  • multiple polarizations per antenna e.g. involving 2, 3 4 or more different polarizations pr. antenna may be utilized as well, for example in certain advanced implementations.
  • multiple feeds per antenna capable of supporting more than one polarization per antenna are possible and embodiments comprising such arrangements are comprised within the scope of the invention.
  • Figure 3 depicts the APC constellation with two polarization zones for the case of 8PSK TCM. From this figure, it can be seen that if the separation between polarizations is large enough, half the potential symbol transitions are eliminated. The actual performance benefit depends on the symbol error rate, the number of bits in error per symbol and, ultimately, on the distance in signal space between channel symbols.
  • a hard decision is effectively made on the MSB based on the detected phase change relative to the carrier phase reference.
  • this becomes one out of two information bits output from the MPSK TCM decoder.
  • Soft decision decoding of the relative phase change is considered to proceed without knowledge of the MSB.
  • the second information bit is the output of an Viterbi decoder (i.e., for decoding the underlying convolutional code).
  • Viterbi decoder i.e., for decoding the underlying convolutional code.
  • pairwise error bound per channel use for 8- PSK may be viewed as having two components, D n o( himself ) and Similarly, 16- PSK TCM would have 4 components and 32-PSK TCM would have 8 components.
  • the Viterbi decoder is not considered to have knowledge of the MSB. Consequently, a relative phase change of the same magnitude and sign results in the same output from the Viterbi decoder, regardless of the MSB.
  • An error leads to a 180 degree phase error. Normally, the probability that a 180 degree phase (i.e., between antipodal signal pairs) is assumed to be very small, relative to transitions between neighboring signals in the constellation, but this is not always true (e.g., at low values of E b /N 0 ).
  • the baseline performance of MPSK TCM must first be evaluated. This requires computation of the average pairwise error bound.
  • the average error weight profile In the case of the Pragmatic MPSK TCM example, we begin by evaluating the average error weight profile
  • E Manufacturing is the error frame at time n
  • a a is the number of channel signals in the set that have a squared Euclidean error weight ⁇ .
  • the probability of bit error may now be evaluated by combining equation (1), with the weight profiles in Table 1, based on the modified generating function approach (cf. H. Dehesh, R. Kerr and A. Viterbi, "Practical Applications of TCM”, QUALCOMM Inc., IEEE MILCOM, August 1990. H. Dehesh, R. Kerr and A. Viterbi, "Practical Applications of TCM”, QUALCOMM Inc., IEEE MILCOM, August 1990.) F(B,E n ,D ⁇ a n ))L.
  • FIG. 4 illustrates the performance improvements in AWG ⁇ (Additive White Gaussian Noise) and Rayleigh Fading achieved by Antenna Polarization Codulation technique (APC) according to a simple embodiment of the invention as described above.
  • B ⁇ R bit error rate
  • FIG. 4 the bit error rate (B ⁇ R) is depicted as a function of E ⁇ /No, with comparative plots showing the AWG ⁇ for a prior art system (old aw gn) and the AWG ⁇ for a system according to a simple embodiment of the invention (new aw gn) and comparative plots showing the Rayleigh Fading for a prior art system (old rayleigh) and the Rayleigh Fading for a system according to a simple embodiment of the invention (new rayleigh).
  • APC is a new technique that integrates antenna polarization and modulation into a new form of codulation. It has potential application to a wide range of modulation techniques employed in wireless and mobile communication systems.
  • the performance benefit is the result of increasing the effective distance between symbols in signal space (i.e., coded or otherwise).
  • APC can be implemented using existing technology, as well as, integrated into new designs.
  • the example presented above is focused on the application of APC to systems where minimal changes are required in order to integrate antenna polarization with the basedband subsystem (i.e., modulation and coding).
  • the MSB determines the antenna/polarization
  • other implementations of APC are possible and may be advantageous dependent on the system design constraints and complexity.
  • the achievable performance gain is increased further given polarization switching based on other than the MSB, for example, the least significant bit (LSB). This is because the error performance is dominated by the contribution of the nearest neighbors in signal space (least distant). As can be seen from figure 3, the nearest neighbors are separated by the LSB. As such, the potential benefits of APC are more pronounced, i.e. than depicted in fig. 4. The tradeoff is dependent on implementation complexity and polarization switching speed.
  • LSB least significant bit
  • APC may be combined with multiple input multiple output antennas (MIMO) into space-time codulation technique integrating modulation, coding, antennas and polarization.
  • MIMO multiple input multiple output antennas
  • 1 channel bit would be transmitted from each of 3 transmit antennas, each employing a different polarization.
  • polarization reuse may be possible and advantageous in some cases e.g. when combined in the context of a MIMO system operating in a multipath fading channel, where spatial separation of signals is possible.
  • APC is complimentary to polarization division multiple access (PDMA), i.e. a multiplexing technique using wave polarization (as described in international patent application No. PCT/DK01/00050 ("System for communication" by Prasad, Jyoti et al)) and may be employed together with PDMA.
  • PDMA polarization division multiple access
  • polarizations than right hand and left hand polarization may be employed in connection with the invention, e.g. left and right slant polarization, left and right circular polarization, vertical and horizontal polarization etc.
  • more than two different polarizations may be utilized as already explained, e.g. three, four etc.
  • the antenna polarization may be provided using two or more antennas with different polarizations pr unit, one antenna facilitating multiple polarizations may be provided pr. unit and of course a combination of these two solutions may be provided as well.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé et un système d'émission de signaux de données numériques dans lesquels sont réalisés une modulation des signaux numériques et un codage de ces signaux au moyen d'une polarisation d'antenne. Il en résulte la réalisation d'une intégration de polarisation d'antenne d'émission avec modulation, apportant une meilleure performance et une plus grande robustesse.
PCT/DK2001/000755 2001-11-15 2001-11-15 Codulation de polarisation d'antenne WO2003043235A1 (fr)

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PCT/DK2001/000755 WO2003043235A1 (fr) 2001-11-15 2001-11-15 Codulation de polarisation d'antenne
EP01274689A EP1444797A1 (fr) 2001-11-15 2001-11-15 Codulation de polarisation d'antenne

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004070971A1 (fr) * 2003-02-04 2004-08-19 Jyoti Prasad Codage de polarisation
WO2005057817A1 (fr) * 2003-12-03 2005-06-23 Ut-Battelle, Llc Modulation et/ou demodulation pluridimensionnelle de signal pour communication de donnees
US7092440B1 (en) 2000-09-27 2006-08-15 Ut-Battelle Llc Hybrid spread-spectrum technique for expanding channel capacity
US7315563B2 (en) 2003-12-03 2008-01-01 Ut-Battelle Llc Multicarrier orthogonal spread-spectrum (MOSS) data communications
US7656931B2 (en) 2003-12-31 2010-02-02 Ut-Battelle, Llc Hybrid spread spectrum radio system
US8199851B1 (en) 2011-07-14 2012-06-12 The Aerospace Corporation Systems and methods for increasing communications bandwidth using non-orthogonal polarizations
CN115276906A (zh) * 2022-07-25 2022-11-01 哲库科技(上海)有限公司 数据帧传输方法、装置、芯片、存储介质和蓝牙设备
WO2024145378A1 (fr) * 2022-12-30 2024-07-04 Hughes Network Systems, Llc Modulation de communication sans fil à l'aide d'une polarisation électromagnétique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521878A (en) * 1982-01-28 1985-06-04 Fujitsu Limited Data transmitting-receiving system
US5898362A (en) * 1997-06-02 1999-04-27 Motorola, Inc. System for transmitting and receiving polarized CDMA signals and method of operation thereof
US6094428A (en) * 1997-04-30 2000-07-25 Motorola, Inc. Method and apparatus for transmission and reception of a transmission rate in a CDMA communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521878A (en) * 1982-01-28 1985-06-04 Fujitsu Limited Data transmitting-receiving system
US6094428A (en) * 1997-04-30 2000-07-25 Motorola, Inc. Method and apparatus for transmission and reception of a transmission rate in a CDMA communication system
US5898362A (en) * 1997-06-02 1999-04-27 Motorola, Inc. System for transmitting and receiving polarized CDMA signals and method of operation thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7092440B1 (en) 2000-09-27 2006-08-15 Ut-Battelle Llc Hybrid spread-spectrum technique for expanding channel capacity
WO2004070971A1 (fr) * 2003-02-04 2004-08-19 Jyoti Prasad Codage de polarisation
WO2005057817A1 (fr) * 2003-12-03 2005-06-23 Ut-Battelle, Llc Modulation et/ou demodulation pluridimensionnelle de signal pour communication de donnees
US7315563B2 (en) 2003-12-03 2008-01-01 Ut-Battelle Llc Multicarrier orthogonal spread-spectrum (MOSS) data communications
US7340001B2 (en) 2003-12-03 2008-03-04 Ut-Battelle Llc Multidimensional signal modulation and/or demodulation for data communications
US7656931B2 (en) 2003-12-31 2010-02-02 Ut-Battelle, Llc Hybrid spread spectrum radio system
US7660338B2 (en) 2003-12-31 2010-02-09 Ut-Battelle, Llc Hybrid spread spectrum radio system
US8199851B1 (en) 2011-07-14 2012-06-12 The Aerospace Corporation Systems and methods for increasing communications bandwidth using non-orthogonal polarizations
CN115276906A (zh) * 2022-07-25 2022-11-01 哲库科技(上海)有限公司 数据帧传输方法、装置、芯片、存储介质和蓝牙设备
CN115276906B (zh) * 2022-07-25 2024-04-05 哲库科技(上海)有限公司 数据帧传输方法、装置、芯片、存储介质和蓝牙设备
WO2024145378A1 (fr) * 2022-12-30 2024-07-04 Hughes Network Systems, Llc Modulation de communication sans fil à l'aide d'une polarisation électromagnétique
US12199733B2 (en) 2022-12-30 2025-01-14 Hughes Network Systems, Llc Wireless communication modulation using electromagnetic polarization

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