WO2019196913A1 - Procédé et appareil de transmission de données modulées selon une loi de probabilité non uniforme - Google Patents

Procédé et appareil de transmission de données modulées selon une loi de probabilité non uniforme Download PDF

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Publication number
WO2019196913A1
WO2019196913A1 PCT/CN2019/082343 CN2019082343W WO2019196913A1 WO 2019196913 A1 WO2019196913 A1 WO 2019196913A1 CN 2019082343 W CN2019082343 W CN 2019082343W WO 2019196913 A1 WO2019196913 A1 WO 2019196913A1
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Prior art keywords
uniform
demodulation
probability
information
physical layer
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PCT/CN2019/082343
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English (en)
Chinese (zh)
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黄伟
方平
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华为技术有限公司
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Priority claimed from CN201810847877.2A external-priority patent/CN110380999B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to US17/046,500 priority Critical patent/US11303498B2/en
Priority to JP2020555494A priority patent/JP7118168B2/ja
Priority to KR1020207028300A priority patent/KR102430191B1/ko
Priority to EP19785349.2A priority patent/EP3754923A4/fr
Publication of WO2019196913A1 publication Critical patent/WO2019196913A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus for probabilistic non-uniform modulation.
  • modulation techniques for example, conventional Quadrature Amplitude Modulation (QAM)
  • QAM Quadrature Amplitude Modulation
  • This type of modulation technique is not good enough in terms of channel capacity or bit error rate in the presence of input amplitude constraints or in the presence of different noise distributions.
  • the embodiment of the present application provides a data transmission method and apparatus for probabilistic non-uniform modulation to improve transmission efficiency of data using probability non-uniform modulation.
  • embodiments provided by the present application include:
  • a data transmission method for probabilistic non-uniform modulation comprising: generating, by a transmitting end, a physical layer data frame, wherein the physical layer data frame includes data and indication information that are non-uniformly modulated by probability, and the indication information is used to indicate that the data is probabilistic Demodulation parameters for uniform demodulation; demodulation parameters include modulation mode of probability non-uniform modulation, modulation order of probability non-uniform modulation, and demodulation parameters further include at least one of the following: each constellation symbol of probability non-uniform modulation The probability of sum, and the mapping relationship between each constellation symbol and the bit stream of the probability non-uniform modulation; the transmitting end sends the physical layer data frame to the receiving end.
  • the transmitting end sends the non-uniformly modulated data to the receiving end, and the receiving end performs the probability non-uniform demodulation on the data
  • the communication system can obtain a better forming gain, and there is an input amplitude constraint or The shot noise channel is closer to the channel capacity or better bit error rate performance, and the transmission efficiency of the data using the probability non-uniform modulation is improved.
  • the demodulation parameter further includes: the number of bits corresponding to each constellation symbol of the probability non-uniform modulation.
  • the transmitting end may send multiple demodulation parameters of the probability non-uniform modulation to the receiving end, thereby improving the correctness of the demodulation of the probability non-uniform constellation symbols by the receiving end.
  • the indication information is a demodulation parameter.
  • the transmitting end can display the indication demodulation parameter, thereby reducing the demodulation complexity of the receiving end.
  • the indication information is a first identifier, and the first identifier is used to indicate a demodulation parameter.
  • the transmitting end only needs to carry the first identifier in the physical layer data frame, so that the receiving end obtains the demodulation parameter, and does not need to carry all the demodulation parameters in the physical layer data frame.
  • Smaller information redundancy carries demodulation parameters with non-uniform demodulation probability, which can improve transmission efficiency and save transmission resources.
  • the indication information includes: a second identifier and a first part information of the demodulation parameter
  • the second identifier is used to indicate the second part information of the demodulation parameter
  • the demodulation parameter includes the first part information and The second part of the information.
  • the transmitting end carries the second identifier in the physical layer data frame, and carries the partial demodulation parameter (that is, the first part information), so that the receiving end directly obtains part of the demodulation parameter, while ensuring the transmission efficiency, Reduce the demodulation delay and demodulation complexity of the demodulator.
  • the first part of the information includes information A and information B
  • the information A is the probability of each constellation symbol of probability non-uniform modulation
  • the information B is the mapping relationship of each constellation symbol and the bit stream of the probability non-uniform modulation.
  • information A and information B are located in different domains in the physical layer header of the physical layer data frame.
  • the transmitting end carries a partial demodulation parameter (ie, the first part of information) in the physical layer data frame, so that the receiving end directly obtains part of the demodulation parameter, and reduces the demodulation of the demodulator while ensuring the transmission efficiency. Delay and demodulation complexity.
  • the data transmission method of the probabilistic non-uniform modulation further comprises: before the transmitting end generates the physical layer data frame, the transmitting end generates the data by using the multi-layer encoder and the deterministic isometric mapper. Or, before the sender generates the physical layer data frame, the sender uses a single layer encoder and a deterministic isometric mapper to generate data. In this embodiment, the transmitting end can generate data in the physical layer data frame in multiple manners.
  • the indication information is located in a physical layer header of the physical layer data frame.
  • the physical layer data frame is for wireless optical communication.
  • a data transmission method for probabilistic non-uniform modulation comprising: receiving, by a receiving end, a physical layer data frame, wherein the physical layer data frame includes data and indication information that are non-uniformly modulated by probability, and the indication information is used to indicate that the data is probabilistic Demodulation parameters for uniform demodulation; demodulation parameters include modulation mode of probability non-uniform modulation, modulation order of probability non-uniform modulation, and demodulation parameters further include at least one of the following: each constellation symbol of probability non-uniform modulation The probability of the sum, and the mapping relationship between each constellation symbol and the bit stream of the probability non-uniform modulation; the receiving end determines the demodulation parameter according to the indication information; and the receiving end performs the probability non-uniform demodulation on the data according to the demodulation parameter.
  • the transmitting end sends the non-uniformly modulated data to the receiving end, and the receiving end performs probabilistic non-uniform demodulation on the data
  • the communication system can obtain a better forming gain, and there is input amplitude constraint or shot.
  • the noise channel is closer to the channel capacity or better bit error rate performance, and the transmission efficiency of the data using the probability non-uniform modulation is improved.
  • the demodulation parameter further comprises: a number of bits corresponding to each constellation symbol of the probability non-uniform modulation.
  • the transmitting end may send multiple demodulation parameters of the probability non-uniform modulation to the receiving end, thereby improving the correctness of the demodulation of the probability non-uniform constellation symbols by the receiving end.
  • the indication information is a demodulation parameter.
  • the transmitting end can display the indication demodulation parameter, thereby reducing the demodulation complexity of the receiving end.
  • the indication information is a first identifier
  • the first identifier is used to indicate a demodulation parameter
  • the receiving end determines the demodulation parameter according to the indication information, including: the receiving end according to the identifier and the demodulation parameter
  • the correspondence and the first identifier determine a demodulation parameter that performs probabilistic non-uniform demodulation on the data, the identifier including the first identifier.
  • the transmitting end only needs to carry the first identifier in the physical layer data frame, so that the receiving end obtains the demodulation parameter, and does not need to carry all the demodulation parameters in the physical layer data frame. Smaller information redundancy carries demodulation parameters with non-uniform demodulation probability, which can improve transmission efficiency and save transmission resources.
  • the receiving end determines the demodulation parameter according to the indication information, comprising: the receiving end acquires the first part of the demodulation parameter according to the physical layer data frame; the receiving end according to the correspondence between the identifier and the demodulation parameter and the second identifier Determining a second portion of the demodulation parameters of the probability non-uniform demodulation of the data, the identifier comprising the second identifier.
  • the transmitting end carries the second identifier in the physical layer data frame, and carries the partial demodulation parameter (that is, the first part information), so that the receiving end directly obtains part of the demodulation parameter, while ensuring the transmission efficiency, Reduce the demodulation delay and demodulation complexity of the demodulator.
  • the first partial information includes information A and information B
  • the information A is the probability of each constellation symbol of probability non-uniform modulation
  • the information B is the mapping relationship between each constellation symbol and the bit stream of the probability non-uniform modulation.
  • information A and information B are located in different domains in the physical layer header of the physical layer data frame.
  • the transmitting end carries some parameters (ie, the first part information) in the demodulation parameter in the physical layer data frame, so that the receiving end directly acquires some parameters in the demodulation parameter, and reduces the transmission efficiency while reducing the transmission efficiency. Demodulation delay and demodulation complexity of the demodulator.
  • the receiving end performs probabilistic non-uniform demodulation on the data according to the demodulation parameter, including: when the transmitting end generates the data by using the multi-layer encoder and the deterministic isometric mapper, receiving The end uses a step-by-step decoder and demodulation parameters to perform probabilistic non-uniform demodulation of the data, or when the transmitting end uses a single-layer encoder and a deterministic isometric mapper to generate data, the receiving end uses a joint de-mapping decoder and solution.
  • the tuning parameter performs probabilistic non-uniform demodulation on the data.
  • the receiving end may perform demodulation by using a corresponding demodulation mode.
  • the indication information is located in a physical layer header of the physical layer data frame.
  • the physical layer data frame is for wireless optical communication.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: a processing unit and a communication unit; the processing unit, configured to generate a physical layer data frame, wherein the physical layer data frame includes data that is non-uniformly modulated by probability Instructing information, the indication information is used to indicate a demodulation parameter for probabilistic non-uniform demodulation of the data; the demodulation parameter includes a modulation mode of the probability non-uniform modulation, and a modulation order of the probabilistic non-uniform modulation And the demodulation parameter further includes at least one of: a probability of each of the constellation symbols whose probability is non-uniformly modulated, and a mapping relationship between each constellation symbol and the bit stream of the probability non-uniformly modulated;
  • the communication unit is configured to send the physical layer data frame to a receiving end.
  • the demodulating parameter further comprising: a number of bits corresponding to each constellation symbol of the probability non-uniform modulation.
  • the indication information is the demodulation parameter.
  • the indication information is a first identifier, the first identifier being used to indicate the demodulation parameter.
  • the indication information includes: a second identifier and first part information of the demodulation parameter, the second identifier is used to indicate second part information of the demodulation parameter,
  • the demodulation parameter includes the first partial information and the second partial information.
  • the first partial information comprises information A and information B, the information A being a probability of each of the constellation symbols of the probability non-uniformly modulated, the information B being non-uniformly modulated by the probability A mapping relationship between each constellation symbol and a bit stream, wherein the information A and the information B are located in different domains in a physical layer header of the physical layer data frame.
  • the processing unit is further configured to: generate the data by using a multi-layer encoder and a deterministic isometric mapper, or adopt a single-layer encoder and certainty, etc., as in any one of embodiments 19-24.
  • the long mapper generates the data.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: a processing unit and a communication unit; the communication unit configured to receive a physical layer data frame, wherein the physical layer data frame includes data that is non-uniformly modulated by probability Instructing information, the indication information is used to indicate a demodulation parameter for probabilistic non-uniform demodulation of the data; the demodulation parameter includes a modulation mode of the probability non-uniform modulation, and a modulation order of the probabilistic non-uniform modulation And the demodulation parameter further includes at least one of: a probability of each of the constellation symbols whose probability is non-uniformly modulated, and a mapping relationship between each constellation symbol and the bit stream of the probability non-uniformly modulated; The processing unit is configured to determine the demodulation parameter according to the indication information, and the processing unit is configured to perform probability non-uniform demodulation on the data according to the demodulation parameter.
  • the demodulating parameter further comprises: a number of bits corresponding to each constellation symbol of the probability non-uniformly modulated.
  • the indication information is the demodulation parameter.
  • the indication information is a first identifier
  • the first identifier is used to indicate the demodulation parameter
  • the processing unit is configured to: according to the identifier and the demodulation parameter Corresponding relationship and the first identifier determine a demodulation parameter for probabilistic non-uniform demodulation of the data, the identifier including the first identifier.
  • the indication information comprises: a second identifier and first part information of the demodulation parameter, the second identifier being used to indicate second part information of the demodulation parameter,
  • the demodulation parameter includes the first part information and the second part information;
  • the processing unit is specifically configured to: acquire the first part information of the demodulation parameter according to the physical layer data frame; A correspondence of demodulation parameters and the second identifier determine second portion of information of a demodulation parameter that performs probabilistic non-uniform demodulation of the data, the identifier including the second identifier.
  • the first part information includes information A and information B
  • the information A is a probability of each of the constellation symbols of the probability non-uniformly modulated
  • the information B is non-uniformly modulated by the probability.
  • processing unit is further configured to: when the data is generated by using a multi-layer encoder and a deterministic isometric mapper, using a step-by-step decoder and the The demodulation parameter performs probabilistic non-uniform demodulation on the data, or, when the data is generated by using a single layer encoder and a deterministic isometric mapper, using a joint demap decoder and the demodulation parameter pair The data is subjected to probabilistic non-uniform demodulation.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: a memory and a processor; the memory for storing computer execution instructions, the processor executing the memory storage The computer executes instructions to cause the probability non-uniformly modulated data transmission device to implement the probability non-uniformly modulated data transmission method as described in any of embodiments 1-9.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: a memory and a processor; the memory for storing computer execution instructions, the processor executing the memory storage The computer executes instructions to cause the probability non-uniformly modulated data transmission device to implement the probability non-uniformly modulated data transmission method as described in any of embodiments 10-18.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: one or more processors, one or more memories, one or more baseband processing modules, one or more light source drivers, one or more light sources;
  • the memory is configured to store program instructions, and the processor is configured to control the baseband processing module, the light source driver, and the light source according to the program instructions stored in the memory to execute the method as described in any one of Embodiments 1-9;
  • the baseband processing module is configured to generate a physical layer data frame, and send the physical layer data frame to the light source driver;
  • the light source driver is configured to generate a direct current or a direct current voltage, and receive the received
  • the physical layer data frame is superimposed with a direct current or a direct current voltage to generate an electrical signal with a bias, and the biased electrical signal is sent to the light source;
  • the light source is used to bias according to the band
  • the electrical signal produces an optical signal.
  • a data transmission apparatus for probabilistic non-uniform modulation comprising: one or more processors, one or more memories, one or more baseband processing modules, one or more photodetectors, one or more optical antennas
  • the memory is configured to store program instructions
  • the processor is configured to control the baseband processing module, the photodetector, and the optical antenna to perform according to an embodiment according to program instructions stored in the memory.
  • the optical antenna is configured to receive an optical signal, and send the optical signal to the photodetector;
  • the photodetector is configured to receive the optical signal Converting the optical signal into a biased electrical signal and transmitting the biased electrical signal to the baseband processing module, the biased electrical signal being a biased current signal or band a biased voltage signal;
  • the baseband processing module configured to receive the biased electrical signal, perform signal processing on the biased electrical signal to obtain a physical layer data frame, and are non-uniform according to probability
  • the demodulation parameter performs probabilistic non-uniform demodulation processing and decoding processing on the data, where the probabilistic non-uniform demodulation parameter is a demodulation parameter indicated by the indication information in the physical layer data frame, and the data is the physical layer data.
  • the data carried in the frame that is non-uniformly modulated by probability.
  • a computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform any of the methods provided in any one of embodiments 1 through 18.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform any of the methods provided in any one of embodiments 1 through 18.
  • the embodiments provided by the present application also include (the numbers of the embodiments provided in this section have no clear correspondence with the numbers of the embodiments provided in other parts of the present text, and only the convenience of the description in this part) :
  • a data transmission method for probabilistic non-uniform modulation which is applied to a transmitting end, comprising: a transmitting end generates a physical layer data frame and performs probability non-uniform modulation; and the physical layer data frame carries a complete probability non-uniform signal demodulation
  • the method further comprising: the physical layer data frame being capable of carrying various parameter information required to support the frame data completion probability non-uniform modulation and demodulation in a direct manner or by carrying in an indirect manner Identifier information capable of characterizing/mapping these parameter information.
  • the physical layer data frame can be indirectly transmitted by carrying a probability coding strategy PMCS-ID capable of supporting the frame data to complete probabilistic non-uniform modulation and demodulation required parameter information.
  • Identifier information wherein the PMCS-ID identifier is placed in the physical layer header, and each segment identifier in the PMCS-ID identifier respectively identifies a modulation type of probability non-uniform modulation, a number of bits carried by each coded symbol, and a modulation order a parameter of a constellation symbol probability, a constellation symbol, and a bit stream;
  • the parameter information mapped by the PMCS-ID identifier may be preset in a manner such as a probability modulation coding table capable of mapping an identifier to each parameter information relationship. In the sender and receiver.
  • the method further includes: the physical layer data frame can be carried in a direct manner by carrying parameter information required to support the frame data to complete probability non-uniform modulation and demodulation and in an indirect manner. Demodulating the identifier information of the required parameter information; wherein the modulation type and the bit number parameter information carried by each coding symbol are characterized by the identifier; and the MOP module and the BSM module directly carry the probability non-added by adding the load in the physical layer The modulation order of the uniform modulation, the constellation symbol probability, and the mapping relationship information between the constellation symbol and the bit stream.
  • a data transmission method for probabilistic non-uniform modulation, applied to a receiving end comprising: receiving, by the receiving end, the physical layer data frame, and obtaining various parameter information required for demodulating a non-uniform signal for completion probability in a certain manner, After the verification is correct, the demodulator will use the parameter information to complete the probabilistic non-uniform signal demodulation; the various parameter information required for the completion probability non-uniform signal demodulation includes the modulation type of the probability non-uniform modulation, each coding The number of bits carried by the symbol, the modulation order, the constellation symbol probability, and the parameter of the mapping relationship between the constellation symbol and the bit stream.
  • the method further comprises: the receiving end being capable of obtaining various parameter information required to perform probabilistic non-uniform signal demodulation in a direct or indirect manner.
  • the device can know the modulation type of the frame data, the number of bits carried by each coded symbol, the modulation order, and the constellation by obtaining a mapping relationship between the PMCS-ID identifier and various types of parameters required for demodulation, such as a query probability modulation coding table. Parameter information of symbol probability, constellation symbol and bit stream mapping, and used for decoding.
  • the method further comprising: said PMCS-ID identifier in the physical layer header of the received data frame is only used to identify a modulation type of probability non-uniform modulation and carried by each coded symbol
  • the receiving end needs to directly extract the modulation order of the probability non-uniform modulation, the constellation symbol probability, and the mapping relationship parameter information of the constellation symbol and the bit stream through the MOP module and the BSM module placed in the physical layer header load; Demodulation is performed after obtaining various parameter information required for probability non-uniform demodulation.
  • the method further comprises: after receiving various parameter information required for probabilistic non-uniform demodulation, and adopting a message transmission/propagation algorithm capable of utilizing soft information, such as a sum product algorithm (MP algorithm) Perform joint demodulation and decoding of probabilistic non-uniformly modulated signals.
  • a message transmission/propagation algorithm capable of utilizing soft information, such as a sum product algorithm (MP algorithm) Perform joint demodulation and decoding of probabilistic non-uniformly modulated signals.
  • MP algorithm sum product algorithm
  • a data transmission method for probabilistic non-uniform modulation comprising: for a communication system suitable for probabilistic non-uniform modulation, a transmitting end generates a physical layer data frame, and performs probabilistic non-uniform modulation on the generated data frame, and the receiving end receives Probabilistic non-uniform signal demodulation is performed after the data frame.
  • the method further comprises: said probabilistic non-uniform constellation symbol can be extended to an N-dimensional signal space (N > 1 and N is a positive integer).
  • the method further comprises: after receiving the physical layer data frame, the receiving end first needs to perform frame synchronization, and after completing the frame synchronization, complete channel estimation, channel equalization, and related parameter verification, and solution
  • the modulator starts demodulating.
  • FIG. 1 is a schematic diagram of mapping between a bitstream group and a constellation symbol according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a bitstream group and constellation symbol mapping and a position of a constellation symbol in a constellation diagram according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of still another bitstream group and constellation symbol mapping and a constellation symbol in a constellation diagram according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a processing procedure of data at a transmitting end and a receiving end according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of another processing procedure of data at a transmitting end and a receiving end according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of another processing procedure of data at a transmitting end and a receiving end according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of another processing procedure of data at a transmitting end and a receiving end according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of hardware of a data transmission apparatus for probabilistic non-uniform modulation according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of hardware of a data transmission apparatus for probabilistic non-uniform modulation according to an embodiment of the present disclosure.
  • FIG. 10 is a flowchart of a data transmission method for probabilistic non-uniform modulation according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a physical layer data frame according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another physical layer data frame according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a device according to an embodiment of the present application.
  • Modulation method It can also be called a modulation type, and refers to a modulation method used when modulating a coded bit (or an encoded bit stream).
  • the modulation method may be QAM, Quadrature Phase Shift Keyin (QPSK) modulation, Pulse Amplitude Modulation (PAM), or the like.
  • Constellation symbol refers to a modulation symbol obtained by modulating a coded bit (or an encoded bit stream).
  • the number of bits corresponding to the constellation symbol it can also be described as the number of bits carried or contained by the constellation symbol, and refers to the number of bits of the coded bit (or coded bit stream) corresponding to the constellation symbol.
  • a coded bit (or coded bit stream) corresponding to a constellation symbol is modulated or mapped to obtain the constellation symbol.
  • Modulation order The number of types of constellation symbols.
  • Probability of constellation symbols The theoretical proportion of constellation symbols in the constellation symbol set. Exemplarily, if the theoretical proportion of a constellation symbol S 2 in the constellation symbol set is 3/8, the probability of the constellation symbol is 3/8.
  • the constellation symbols may be referred to as probability uniform constellation symbols.
  • the constellation symbols may be referred to as probabilistic non-uniform constellation symbols.
  • the probabilistic non-uniform constellation symbol can be obtained by modulating or mapping the coded bits (or the encoded bit stream) by the non-equal length mapper or the probability non-uniform mapper.
  • Probability of coded bits The theoretical proportion of coded bits of a value in the coded bitstream. Illustratively, if the coded bit with a coded bit value of 1 has a theoretical ratio of 1/2 in the coded bitstream, the probability of the coded bit is 1/2. When the probabilities of coded bits of different values are the same, the coded bits may be referred to as equal probability coded bits, otherwise the coded bits may be referred to as non-equal probability coded bits.
  • the encoded bit stream obtained by channel coding of the equal probability original bit stream is also equally probable.
  • the original bit stream can be a bit stream obtained by encoding the source.
  • the modulation technique of the non-uniform constellation is a modulation method in which the probability of the constellation symbols is the same, and the spacing of the constellation symbols (ie, the Euclidean Distance) is different.
  • the modulation mode with the same probabilities of the traditional constellation symbols multiple equal probability coding bits can be mapped into one constellation symbol, and there can be multiple constellation symbols, and the probability of multiple constellation symbols is the same.
  • the optimal signal capable of achieving the channel capacity is a discrete, non-uniform constellation symbol, and then combined with the maximum a posteriori (Maximum).
  • a Posterior (referred to as MAP) estimation algorithm demodulates constellation symbols to obtain ideal shaping gain and bit error rate performance. Therefore, probabilistic non-uniform modulation is proposed.
  • Probabilistic non-uniform modulation is a modulation method in which the probability of a constellation symbol is not the same, and the spacing between constellation symbols may be the same or different.
  • multiple equal probability coded bits may be mapped into one constellation symbol, and there may be multiple constellation symbols, and the probability of at least two of the plurality of constellation symbols is different.
  • probabilistic non-uniform modulation techniques can achieve better shaping gain (Shaping Gain) and have non-ideal interference such as phase noise and quantization noise. Better robustness.
  • probabilistic non-uniform modulation due to the different probabilities of constellation symbols, the traditional maximum likelihood estimation algorithm based on the same hypothesis of constellation symbol prior probability is demodulated. The algorithm is no longer applicable.
  • the demodulator in the receiving end must know the probability of each constellation symbol, the modulation order of the probability non-uniform modulation, etc., in order to complete the demodulation of the constellation symbol based on the MAP estimation algorithm.
  • a plurality of bit stream groups may be set, one bit stream group includes one or more bit streams, and one bit stream includes one or more bits.
  • the bit stream in each bitstream group can be mapped to 1 constellation symbol.
  • the probability of the constellation symbols of the bitstream mapping in at least two bitstream groups is not the same.
  • the bit stream in a plurality of bitstream groups contains the same number of bits.
  • the bit stream in the plurality of bitstream groups contains different numbers of bits.
  • the position of the constellation symbol in the constellation diagram can also be seen in FIG. 2.
  • the first bit 0 can be mapped to S 1
  • the second and third bits 11 can be mapped to S 3
  • the fourth bit 0 can be mapped to S. 1
  • the 5th and 6th bits 10 can be mapped to S 2
  • the constellation symbol in the constellation symbol set obtained according to the 011010 mapping is S 1 S 3 S 1 S 2 .
  • the bits in the bitstream may be channel-encoded equal probability coded bits.
  • the constellation symbol can be a constellation symbol in the PAM constellation symbol set.
  • the original bit stream is channel-encoded by the channel encoder to obtain an encoded bit stream, and the encoded bit stream is mapped by the mapper to obtain a constellation symbol.
  • the constellation symbol is demodulated by a demodulator to obtain an encoded bit stream, and the encoded bit stream is decoded by a decoder to obtain an original bit stream.
  • the probability non-uniform constellation symbol in the embodiment of the present application may be generated by any one of the first mode to the third mode.
  • the original bit stream is channel-encoded by an equal probability channel coder to obtain an equal probability coded bit stream, and the equal probability coded bit stream is mapped by a non-equal length Huffman mapper to generate a probability.
  • Non-uniform constellation symbol The demodulator in the receiving end demodulates the probability non-uniform constellation symbol according to the complete structure of the learned non-equal length Huffman mapper to obtain an equal probability encoded bit stream, and the equal probability encoded bit stream is decoded by the channel decoder.
  • Original bit stream is mapped to obtain a probability coded bit stream.
  • This method can generate constellation symbols with different modulation orders and band efficiency more flexibly and can obtain larger forming gains compared to the conventional probability uniform modulation method.
  • the Joint Source-Channel Decoding (JSCD) algorithm may be used to decode the equal probability encoded bit stream.
  • Method 2 Referring to FIG. 6, at the transmitting end, the original bit stream is subjected to channel coding by a multi-level coding (MLC) device to obtain an equal probability coded bit stream, and the equal probability coded bit stream is deterministic.
  • the isometric mapper maps to generate a probability non-uniform constellation symbol.
  • the probabilistic non-uniform constellation symbol is stepwise decoded by a Multi-stage Decoding (MSD) to obtain a raw bit stream.
  • MSD Multi-stage Decoding
  • Mode 3 Referring to FIG. 7, at the transmitting end, the original bit stream is subjected to channel coding by a single layer coding (SLC) to obtain an equal probability coded bit stream, and the equal probability coded bit stream is subjected to a deterministic isometric mapping.
  • the device maps to generate a probability non-uniform constellation symbol.
  • the joint non-uniform constellation symbol is demodulated and decoded by a Joint Demapping-Decoding (JDD) device to obtain an original bit stream.
  • JDD Joint Demapping-Decoding
  • IM-DD input intensity limited Intensity Modulation-Direct Detection
  • RF with limited input signal amplitude or input signal amplitude and noise power (Radio Frequency, RF for short) )Communication Systems.
  • IM-DD communication system includes Visible Light Communication (VLC), Free Space Optics (FSO), Optical Camera Communication (OCC), and Wireless Light Scattering Communication ( Typical Wireless Optical Communication (OWC) system such as Optical Wireless Scattering Communication (OWSC).
  • VLC Visible Light Communication
  • FSO Free Space Optics
  • OOCC Optical Camera Communication
  • WSC Wireless Light Scattering Communication
  • OWSC Optical Wireless Scattering Communication
  • the embodiment of the present application provides a hardware structure diagram of a data transmission apparatus with probability non-uniform modulation.
  • the data transmission apparatus 80 of the probability non-uniform modulation may be a transmitting end or a receiving end, specifically
  • the probability non-uniformly modulated data transmission device 80 can be a transmitting end or a receiving end in a radio frequency communication scenario.
  • the probability non-uniformly modulated data transmission device 80 includes at least one processor (e.g., processor 801, processor 808), communication bus 802, memory 803, and at least one communication interface 804.
  • the processor 801 may be one or more general-purpose central processing units (CPUs), microprocessors, application-specific integrated circuits (ASICs), or one or more for controlling the present An integrated circuit for the execution of a program program.
  • CPUs general-purpose central processing units
  • ASICs application-specific integrated circuits
  • a communication bus 802 is configured to communicate between the above components to transfer information.
  • the communication interface 804 is configured to communicate with other devices or communication networks, and may use any device such as an Ethernet device, such as an Ethernet, a Radio Access Network (RAN) node, or a wireless local area network (Wireless Local Area Networks, Referred to as WLAN).
  • an Ethernet device such as an Ethernet, a Radio Access Network (RAN) node, or a wireless local area network (Wireless Local Area Networks, Referred to as WLAN).
  • RAN Radio Access Network
  • WLAN wireless Local Area Networks
  • the memory 803 is configured to store computer execution instructions for executing the solution of the present application, and is controlled by the processor 801 for execution.
  • the processor 801 is configured to execute computer-executed instructions stored in the memory 803, thereby implementing the methods provided by the following embodiments of the present application, for example, performing the actions of the transmitting end or the receiving end hereinafter.
  • the memory 803 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or a device that can store information and instructions.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • Other types of dynamic storage devices may also be Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical disks.
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • the memory 803 can exist independently and is coupled to the processor 801 via a communication bus 802.
  • the memory 803 can also be integrated with the processor 801.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as an application code, which is not specifically limited in this embodiment of the present application.
  • the processor 801 may include one or more CPUs, such as CPU0 and CPU1 in FIG.
  • the probability non-uniformly modulated data transmission device 80 may include multiple processors, such as the processor 801 and the processor 808 in FIG. Each of these processors can be a single-CPU processor or a multi-core processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.
  • the probability non-uniformly modulated data transmission device 80 may also include an output device 805 and an input device 806.
  • Output device 805 is in communication with processor 801 and can display information in a variety of ways.
  • Input device 806 is in communication with processor 801 and can receive user input in a variety of ways.
  • the embodiment of the present application further provides a data transmission device 90 with probability non-uniform modulation.
  • the data transmission device 90 with non-uniform modulation may be the transmitting end in the embodiment of the present application.
  • the probability non-uniformly modulated data transmission device 90 may be a transmitting end in a radio frequency communication scenario or a transmitting end in a wireless optical communication scenario.
  • Embodiment 1 related to the transmitting end
  • the probability non-uniformly modulated data transmission device 90 may include: one or more processors 901, one Or a plurality of memories 902, one or more baseband processing modules 903, and one or more radio frequency transceivers 909; the radio frequency transceiver 909 is configured to receive or transmit radio frequency signals; and the processor 901 is configured to store according to the memory 902
  • the program instructions control the baseband processing module 903 and the radio frequency transceiver 909 to perform the actions performed by the transmitting end described in any of the method embodiments below.
  • the probability non-uniformly modulated data transmission device 90 may include: one or more processors 901, one Or a plurality of memories 902, one or more baseband processing modules 903, one or more light source drivers 904, one or more light sources 905.
  • the memory 902 is configured to store program instructions.
  • the processor 901 is configured to control, according to program instructions stored in the memory 902, the baseband processing module 903, the light source driver 904, and the light source 905 to perform an action performed by the transmitting end described in any one of the following method embodiments.
  • the baseband processing module 903 is configured to generate a physical layer data frame, and send the physical layer data frame to the light source driver 904.
  • the physical layer data frame may be the physical layer data frame mentioned in the following application.
  • the light source driver 904 is configured to generate a direct current or a direct current voltage, and superimpose the received physical layer data frame with the direct current or the direct current voltage to generate an offset electrical signal, and send the biased electrical signal to the Light source 905.
  • the light source 905 is configured to generate an optical signal according to the electrical signal with a bias.
  • the non-uniformly modulated data transmission device 90 may also include one or more radio frequency transceivers 909 for receiving or transmitting radio frequency signals.
  • the processor 901, the memory 902, the baseband processing module 903, the light source driver 904, and the radio frequency transceiver 909 can be connected by a bus.
  • the baseband processing module 903 can perform channel estimation, add a channel estimation sequence to the physical layer data frame, add a synchronization preamble to the physical layer data frame, and add a dimming mode or the like to the physical layer data frame.
  • the probability non-uniformly modulated data transmission device 90 may also include one or more photodetectors 906, and one or more optical antennas 907.
  • the role of photodetector 906 and optical antenna 907 can be referred to the related description in the embodiments related to the receiving end below.
  • the layer encoder and the deterministic isometric mapper, or the single layer encoder and deterministic isometric mapper shown in FIG. 7 may be located in the baseband processing module 903 in the transmitting end.
  • the embodiment of the present application further provides a data transmission apparatus for probabilistic non-uniform modulation, and the data transmission apparatus 90 of the probability non-uniform modulation may be the receiving end in the embodiment of the present application.
  • the probability non-uniformly modulated data transmission device 90 may be a receiving end in a wireless radio communication scenario or a receiving end in a wireless optical communication scenario.
  • Embodiment 1 related to the receiving end
  • the probability non-uniformly modulated data transmission device 90 When the probability non-uniformly modulated data transmission device 90 is a receiving end in a radio frequency communication scenario, as shown in FIG. 9, the probability non-uniformly modulated data transmission device 90 includes: one or more processors 901, one or a plurality of memories 902, one or more baseband processing modules 903, and one or more radio frequency transceivers 909; the radio frequency transceiver 909 is configured to receive or transmit radio frequency signals; and the processor 901 is configured to: according to the program stored in the memory 902
  • the instruction control baseband processing module 903 and the radio frequency transceiver 909 perform the actions performed by the receiving end described in any of the method embodiments below.
  • the probability non-uniformly modulated data transmission device 90 When the probability non-uniformly modulated data transmission device 90 is a receiving end in a wireless optical communication scenario, as shown in FIG. 9, the probability non-uniformly modulated data transmission device 90 includes: one or more processors 901, one or A plurality of memories 902, one or more baseband processing modules 903, one or more photodetectors 906, one or more optical antennas 907.
  • the memory 902 is configured to store program instructions.
  • the processor 901 is configured to control, according to program instructions stored in the memory 902, the baseband processing module 903, the photodetector 906, and the optical antenna 907 to perform an action performed by the receiving end described in any one of the following method embodiments.
  • the optical antenna 907 is configured to receive an optical signal and transmit the optical signal to the photodetector 906.
  • the photodetector 906 is configured to receive an optical signal, convert the optical signal into a biased electrical signal, and send the biased electrical signal to the baseband processing module 903, wherein the biased electrical signal may be biased Set the current signal or a biased voltage signal.
  • the baseband processing module 903 is configured to receive an offset electrical signal, perform signal processing on the biased electrical signal to obtain a physical layer data frame, and perform probabilistic non-uniform demodulation processing and decoding on the data according to the probability non-uniform demodulation parameter.
  • the processing, the probability non-uniform demodulation parameter is a demodulation parameter indicated by the indication information in the physical layer data frame
  • the data is data that is non-uniformly modulated by the probabilities carried in the physical layer data frame.
  • the physical layer data frame may be the physical layer data frame mentioned in the following application.
  • the probability non-uniformly modulated data transmission device 90 may also include one or more radio frequency transceivers 909 for receiving or transmitting radio frequency signals.
  • the processor 901, the memory 902, the baseband processing module 903, the photodetector 906, and the radio frequency transceiver 909 can be connected by a bus.
  • the baseband processing module 903 can perform channel estimation, add a channel estimation sequence to the physical layer data frame, add a synchronization preamble to the physical layer data frame, and add a dimming mode or the like to the physical layer data frame.
  • the probability non-uniformly modulated data transmission device 90 may also include one or more light source drivers 904, and one or more light sources 905.
  • the role of the light source driver 904 and the light source 905 can be referred to the related description in the embodiment related to the above-mentioned transmitting end.
  • the demodulator and decoder shown in FIG. 4, or the demodulator and channel decoder shown in FIG. 5, or the step-by-step decoder shown in FIG. 6, or The joint de-mapping decoder shown in 7 may be located in the baseband processing module 903 in the receiving end.
  • the embodiment of the present application provides a data transmission method for probabilistic non-uniform modulation. As shown in FIG. 10, the method includes:
  • the sending end generates a physical layer data frame, where the physical layer data frame includes data and indication information that are subjected to probabilistic non-uniform modulation, and the indication information is used to indicate a demodulation parameter that performs probabilistic non-uniform demodulation on the data.
  • the physical layer data frame can be used for wireless optical communication.
  • the demodulation parameter includes a modulation mode of probabilistic non-uniform modulation, a modulation order of probability non-uniform modulation, and the demodulation parameter further includes at least one of the following: probability of each constellation symbol of probability non-uniform modulation, and probability The mapping relationship between each constellation symbol and the bit stream of non-uniform modulation. It should be noted that the constellation symbols in the embodiment shown in FIG. 10 are all probabilistic non-uniform constellation symbols.
  • the indication information is located in a physical layer header of the physical layer data frame. In some embodiments, the indication information is checked for protection by a Header Check Sequence (HCS).
  • HCS Header Check Sequence
  • the mapping relationship between the constellation symbol and the bit stream includes information of a bit stream corresponding to the constellation symbol, and a constellation symbol may be modulated by the corresponding bit stream.
  • a constellation symbol may have one or more bit streams.
  • FIG. 1 shows a mapping relationship between four constellation symbols and a bit stream.
  • the demodulation parameter further comprises: a number of bits corresponding to each constellation symbol of the probability non-uniform modulation.
  • a channel coding scheme may also be included.
  • the channel coding method may be multi-layer coding, single layer coding, or the like.
  • the sending end sends a physical layer data frame to the receiving end.
  • the receiving end receives the physical layer data frame, and determines a demodulation parameter according to the indication information.
  • the receiving end performs probability non-uniform demodulation on the data according to the demodulation parameter.
  • the transmitting end sends the non-uniformly modulated data to the receiving end, and the receiving end performs probabilistic non-uniform demodulation on the data
  • the communication system can obtain a better forming gain, and there is an input amplitude constraint. Or approach the channel capacity or achieve better bit error rate performance under the shot noise channel.
  • the constellation symbol generated by the probability non-uniform modulation is non-equal probability compared with the probability uniform modulation, so that the mutual information of the source information entropy and the input and output is larger, thereby making the probability non-uniform constellation symbol
  • the channel capacity is larger, so that higher band utilization can be obtained under the same input amplitude constraint, same signal power, same signal-to-noise ratio, and bit error rate performance, thereby improving data with non-uniform modulation of probability. Transmission efficiency.
  • the probability of non-uniform modulation can be more flexible, not necessarily 2 n (n ⁇ 1 and n is an integer), that is, the modulation order of probability non-uniform modulation can be odd number. Even in the same modulation mode, the number of bits corresponding to each constellation symbol, the probability of each constellation symbol, and the mapping relationship between constellation symbols and bit streams may be quite different. Taking FIG. 1 as an example, when the modulation order is 3, the number of bits corresponding to the constellation symbols in Case 1 and Case 2 is 2, and the number of bits corresponding to the constellation symbols in Case 3 and Case 4 is 3.
  • the mapping relationship between the constellation symbol and the bit stream may be different, and the difference in the mapping relationship may cause the probability of each constellation symbol to be different.
  • the demodulator in the receiving end must know the modulation order of the probability non-uniform modulation, the number of bits corresponding to each constellation symbol, the probability of the constellation symbol, and the mapping relationship between the constellation symbol and the bit stream to successfully complete the constellation symbol. The probability of non-uniform demodulation.
  • the transmitting end generates a physical layer data frame according to the demodulation parameter required by the receiving end, and sends the physical layer data frame to the receiving end.
  • the receiving end can extract the demodulation parameters directly or indirectly from the received physical layer data frame, and complete the probability non-uniform demodulation of the constellation symbols based on the demodulation parameters.
  • the transmitting end before the step 1001, the transmitting end generates data by using a multi-layer encoder and a deterministic isometric mapper.
  • the step 1004 may include: adopting a step-by-step decoder and solution at the receiving end.
  • the tuning parameter performs probabilistic non-uniform demodulation on the data. For details, see the second method above.
  • the transmitting end before the step 1001, the transmitting end generates data by using a single-layer encoder and a deterministic isometric mapper.
  • the step 1004 may include: the receiving end adopts a joint demapping decoder and The demodulation parameters perform probability non-uniform demodulation on the data. For details, see the third method above.
  • the data carried in the data layer of the physical layer in the embodiment of the present application is transmitted by using a single carrier
  • the data of the non-uniform constellation symbol may be subjected to single carrier modulation, and when multi-carrier transmission is used, It may be data that is multi-carrier modulated on the probability non-uniform constellation symbol.
  • the indication information may indicate the demodulation parameter explicitly or implicitly.
  • the indication information may be a demodulation parameter.
  • the receiving end can directly obtain the demodulation parameter according to the physical layer data frame.
  • the indication information may be any one of the following two types of information:
  • the indication information is a first identifier, and the first identifier is used to indicate a demodulation parameter.
  • the step 1003 may include: the receiving end determines, according to the correspondence between the identifier and the demodulation parameter, and the first identifier, a demodulation parameter that performs probabilistic non-uniform demodulation on the data, where the identifier includes the first identifier. symbol.
  • the physical layer data frame generated by the transmitting end includes a physical layer preamble, a PHY header, and a physical layer PHY payload.
  • the physical layer preamble can be used for frame synchronization with the receiving end, and the preamble is a time domain sequence and does not require any channel coding and signal modulation.
  • the physical layer header includes: a first identifier (which may be called a Probability Modulation and Coding Scheme Index (PMCS-ID)), and a PHY service data unit (PSDU) length ( Length), reserved fields (Reserved Fields) and physical layer HCS.
  • PMCS-ID Probability Modulation and Coding Scheme Index
  • PSDU PHY service data unit
  • the PMCS-ID is used to indicate the demodulation parameter.
  • MCS-ID Modulation and Coding Scheme Index
  • the PMCS-ID in the example can not only indicate the modulation mode, but also indicate the modulation order in the same modulation mode, the probability of each constellation symbol, the mapping relationship between each constellation symbol and the bit stream, the channel coding mode, and the like.
  • the PSDU length is used to identify the length of the PSDU in the physical layer data frame.
  • the reserved area is used to support subsequent function expansion.
  • HCS is used for verification of the physical layer header.
  • the data load includes: Optional Fields, Channel Estimation Sequence (CES), and PSDU.
  • CES Channel Estimation Sequence
  • PSDU PSDU
  • the optional area is used for subsequent function expansion.
  • CES is used for channel estimation and channel equalization.
  • the PSDU is valid data, and may be data that is non-uniformly modulated by probability in the embodiment of the present application.
  • the PMCS-ID may include multiple bits for indicating each information in the demodulation parameter, and the receiving end may be configured according to the value of the bit in the PMCS-ID and the preset different bit value and each of the demodulation parameters.
  • the correspondence table of the information determines the demodulation parameters indicated by the PMCS-ID.
  • m6 bits may be included in the above PMCS-ID.
  • a 1 to a m1 bits are used to indicate a modulation mode of probabilistic non-uniform modulation, and the correspondence between the values of a 1 to a m1 bits and the modulation mode of probability non-uniform modulation can be seen in Table 1; a m1 to a m2 The bits are used to indicate the modulation order of the probability non-uniform modulation.
  • B 1 , B 2 , ..., B 2m1 represent a modulation method, respectively.
  • C 1 , C 2 , ..., C 2m2-m1 represent a modulation order, respectively.
  • D 1 , D 2 , ..., D 2m3-m2 represent a single bit number, respectively.
  • u is the modulation order
  • p 1 , p 2 , ..., p u represent the probability of a constellation symbol, respectively.
  • E 1 , E 2 , ..., E 2m5-m4 represent a mapping relationship, respectively.
  • F 1 , F 2 , ..., F 2m6-m5 represent a channel coding mode, respectively.
  • the receiving end after receiving the physical layer data frame, the receiving end first performs data frame synchronization, and after completing the data frame synchronization, starts channel estimation and channel equalization.
  • the demodulator performs probabilistic non-uniform demodulation on the data.
  • the method includes: acquiring a PMCS-ID in a physical layer header, and acquiring a PMCS according to a correspondence relationship between the PMCS-ID and a preset different bit value and each information in the demodulation parameter (for example, the foregoing Table 1 - Table 6)
  • the demodulation parameter indicated by the ID is subjected to probability non-uniform demodulation of the data according to the demodulation parameter.
  • the decoder can perform data decoding through a Message Passing (MP) algorithm capable of utilizing soft information.
  • the MP algorithm can be a sum product algorithm.
  • the demodulator in the receiving end may obtain the demodulation parameter indicated by the PMCS-ID after the check sequence is verified that the PMCS-ID is correct.
  • the transceiver can adopt a processing method such as data retransmission. For details, refer to the prior art.
  • the transmitting end only needs to carry the PMCS-ID in the physical layer data frame, so that the receiving end obtains the demodulation parameter, and does not need to carry all the demodulation parameters in the physical layer data frame, so as to compare Small information redundancy carries demodulation parameters with non-uniform demodulation probability, which can improve transmission efficiency and save transmission resources.
  • the indication information includes: a second identifier and a first part information of the demodulation parameter, the second identifier is used to indicate second part information of the demodulation parameter, and the demodulation parameter comprises the first part information and the second part information.
  • the step 503 may include: the receiving end acquires the first part information of the demodulation parameter according to the physical layer data frame; and the receiving end determines, according to the correspondence between the identifier and the demodulation parameter, and the second identifier, determining the data.
  • the first partial information includes information A and information B
  • the information A is a probability of each constellation symbol of probability non-uniform modulation
  • the information B is a mapping relationship between each constellation symbol of the probability non-uniform modulation and the bit stream
  • the information A and the information B are located in different domains in the physical layer header of the physical layer data frame.
  • the probability and probability of each constellation symbol of the non-uniformly modulated non-uniform modulation may have a variety of mapping relationships between each constellation symbol and the bit stream, if the receiving end searches through the above The manner of the table is determined, and the receiving end needs to spend a lot of time. Therefore, the two pieces of information can be directly carried in the physical layer data frame, thereby reducing the demodulation complexity of the receiving end.
  • the physical layer data frame generated by the transmitting end can be seen in FIG. Compared with FIG. 11, in FIG. 12, a Modulation Order and Probability (MOP) module and a Bit-stream and Symbol Mapping (BSM) module are added to the physical layer header.
  • MOP Modulation Order and Probability
  • BSM Bit-stream and Symbol Mapping
  • the module can also be understood as a domain.
  • the second identifier may also be referred to as a PMCS-ID.
  • the PMCS-ID only needs to indicate part of the information in the demodulation parameters.
  • the PMCS-ID may indicate a modulation mode of probabilistic non-uniform modulation in the demodulation parameter, a bit number information corresponding to each constellation symbol of the probabilistic non-uniform modulation, and a modulation order of the probability non-uniform modulation.
  • the probability of each constellation symbol of probabilistic non-uniform modulation may be included in the MOP module (or referred to as the MOP domain, which may also be used in other names), and the mapping relationship between each constellation symbol and the bit stream of the probabilistic non-uniform modulation may be included in The BSM module (or BSM domain, which is also available in other names).
  • the receiving end after receiving the physical layer data frame, the receiving end first performs data frame synchronization, and after completing the data frame synchronization, starts channel estimation and channel equalization. After channel estimation and channel equalization are completed, the demodulator performs probabilistic non-uniform demodulation on the data.
  • the method includes: acquiring a PMCS-ID in the physical layer header; and mapping a correspondence between the PMCS-ID and the preset different bit values and each information in the demodulation parameter (for example, the foregoing Table 1, Table 2, and Table 3) Obtaining a modulation mode of probabilistic non-uniform modulation in the demodulation parameters indicated by the PMCS-ID, a bit number information corresponding to each constellation symbol of the probabilistic non-uniform modulation, and a modulation order of the probability non-uniform modulation, and in the MOP module and the BSM
  • the module obtains the probability of each constellation symbol of the probabilistic non-uniform modulation in the demodulation parameter and the mapping relationship between each constellation symbol and the bit stream of the probability non-uniform modulation; performing probabilistic non-uniform demodulation on the data according to the obtained demodulation parameters .
  • the decoder can perform data decoding by an MP algorithm (eg, a sum
  • the PMCS-ID may indicate a modulation mode of the probabilistic non-uniform modulation in the demodulation parameter, and a bit number information corresponding to each constellation symbol of the probabilistic non-uniform modulation.
  • the probability of non-uniform modulation in the demodulation parameters and the probability of each constellation of the probability non-uniformly modulated may be included in the MOP module (or called the MOP domain, which may also be used in other names), probabilistic non-uniform modulation
  • the mapping relationship between each constellation symbol and the bit stream can be included in the BSM module (or BSM domain, which can also be used in other names).
  • the receiving end after receiving the physical layer data frame, the receiving end first performs data frame synchronization, and after completing the data frame synchronization, starts channel estimation and channel equalization. After channel estimation and channel equalization are completed, the demodulator performs probabilistic non-uniform demodulation on the data.
  • the method includes: acquiring a PMCS-ID in a physical layer header; acquiring a PMCS according to a PMCS-ID and a preset correspondence table between different bit values and respective information in the demodulation parameter (for example, the foregoing Table 1 and Table 3) - the modulation mode of the probability non-uniform modulation in the demodulation parameter indicated by the ID and the bit number information corresponding to each constellation symbol, and acquire the modulation order of the probability non-uniform modulation in the demodulation parameter in the MOP module and the BSM module, The probability and probability of each constellation symbol of the non-uniformly modulated non-uniformly modulated non-uniformly modulated mapping relationship between each constellation symbol and the bit stream; the data is subjected to probabilistic non-uniform demodulation according to the acquired demodulation parameters.
  • the decoder can perform data decoding by an MP algorithm (eg, a sum product algorithm) capable of utilizing soft
  • the demodulator in the receiving end may obtain the demodulation parameter indicated by the PMCS-ID and the demodulation included in the MOP module and the BSM module after the check sequence is verified that the PMCS-ID, the MOP module, and the BSM module are correct. parameter.
  • the transceiver may adopt a processing method such as data retransmission. For details, refer to the prior art.
  • the transmitting end carries the PMCS-ID in the physical layer data frame, and carries the partial demodulation parameter, so that the receiving end directly obtains partial demodulation parameters, and reduces the demodulation delay and demodulation complexity of the demodulator.
  • the constellation symbol generated by the probabilistic non-uniform modulation is non-equal probability compared with the probabilistic uniform modulation, so that the mutual information of the source information entropy and the input and output is larger.
  • the channel capacity of the probability non-uniform constellation symbol is larger, so that higher band utilization can be obtained under the same input amplitude constraint, the same signal power, the same signal-to-noise ratio, and the same bit error rate performance.
  • the MOP and BSM modules added in some embodiments of the present application can directly carry information in the demodulation parameters, thereby supporting more flexible and more accurate quantization constellation symbol probabilities.
  • the probabilistic non-uniform constellation symbols in some embodiments of the present application may be extended to an N-dimensional signal space (N ⁇ 1 and N is a positive integer).
  • the data transmission device with probability non-uniform modulation includes hardware structures and/or software modules corresponding to the execution of the respective functions in order to implement the above functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the embodiment of the present application may perform functional unit division on a probability non-uniformly modulated data transmission device according to the foregoing method.
  • each functional unit may be divided according to each function, or two or more functions may be integrated into one processing.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 13 shows a possible structural diagram of the device involved in the above embodiment, and the device 130 may be the above-mentioned transmitting end or receiving end, see FIG.
  • the 130 may include a processing unit 1301 and a communication unit 1302, and may further include a storage unit 1303.
  • the processing unit 1301 is configured to perform control management on the action of the sending end.
  • the processing unit 1301 is configured to support the transmitting end to perform steps 1001-1002 in FIG. 10, and/or in the embodiment of the present application. The actions performed by the sender in other processes described.
  • the communication unit 1302 is configured to support the transmitting end to communicate with other network devices, for example, the receiving end in FIG.
  • the storage unit 1303 is configured to store program code and data of the transmitting end.
  • the processing unit 1301 is configured to perform control management on the action of the receiving end.
  • the processing unit 1301 is configured to support the receiving end to perform steps 1003-1004 in FIG. 10, and/or in the embodiment of the present application. The actions performed by the receiving end in other processes described.
  • the communication unit 1302 is configured to support the receiving end to communicate with other network devices, for example, the transmitting end in FIG.
  • the storage unit 1303 is configured to store program codes and data of the receiving end.
  • the processing unit 1301 can be a processor or controller
  • the communication unit 1302 can be a communication interface
  • the storage unit 1303 can be a memory.
  • the processing unit 1301 is a processor
  • the communication unit 1302 is a communication interface
  • the storage unit 1303 is a memory
  • the device involved in the embodiment of the present application may be the device shown in FIG.
  • the processor 801 is configured to perform control management on the action of the sending end.
  • the processor 801 is configured to support the transmitting end to perform steps 1001-1002 in FIG. 10, and/or the present application. The actions performed by the sender in other processes described in the embodiments.
  • the communication interface 804 is used to support the transmitting end to communicate with other network devices, for example, with the receiving end in FIG.
  • the memory 803 is used to store program code and data of the transmitting end.
  • the processor 801 is configured to perform control management on the action of the receiving end.
  • the processor 801 is configured to support the receiving end to perform steps 1003-1004 in FIG. 10, and/or the present application. The actions performed by the receiving end in other processes described in the embodiments.
  • the communication interface 804 is used to support the receiving end to communicate with other network devices, for example, with the transmitting end in FIG.
  • the memory 803 is used to store program codes and data at the receiving end.
  • the device involved in the embodiment of the present application may be the device shown in FIG.
  • the processing unit 1301 may be a baseband processing module 903, the communication unit 1302 may include a light source driver 904 and a light source 905, and the storage unit 1303 may be a memory 902.
  • the baseband processing module 903, the light source driver 904, and the light source 905 perform the actions of the transmitting end in the above method under the control of the processor 901 in accordance with the program instructions stored in the memory 902.
  • the functions of the baseband processing module 903, the light source driver 904, and the light source 905 can be referred to above, and are not described herein again.
  • the processing unit 1301 may be a baseband processing module 903, the communication unit 1302 may include a photodetector 906 and an optical antenna 907, and the storage unit 1303 may be a memory 902.
  • the baseband processing module 903, the photodetector 906, and the optical antenna 907 perform the actions of the receiving end in the above method under the control of the processor 901 in accordance with program instructions stored in the memory 902.
  • the functions of the baseband processing module 903, the photodetector 906, and the optical antenna 907 can be referred to above, and are not described herein again.
  • the embodiment of the present application also provides a computer readable storage medium, including instructions, when executed on a computer, causing a computer to execute the above method.
  • the embodiment of the present application also provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform the above method.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be wired from a website site, computer, server or data center (eg Coax, fiber, Digital Subscriber Line (DSL) or wireless (eg infrared, wireless, microwave, etc.) to another website, computer, server or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

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

Abstract

L'invention concerne un procédé et un appareil de transmission de données modulées selon une loi de probabilité non uniforme, aptes à améliorer l'efficacité de transmission de données modulées selon une loi de probabilité non uniforme. Selon le procédé de l'invention, une extrémité d'envoi génère une trame de données de couche physique contenant des données modulées selon une loi de probabilité non uniforme et des informations d'indication. Les informations d'indication sont utilisées pour indiquer un paramètre de démodulation devant être utilisé pour exécuter une démodulation des données selon une loi de probabilité non uniforme. Le paramètre de démodulation comprend un mode de modulation et un ordre de modulation pour la modulation selon une loi de probabilité non uniforme, et comprend en outre au moins l'un de : la probabilité de chaque symbole de constellation de la modulation selon une loi de probabilité non uniforme, et une relation de mappage entre chaque symbole de constellation de la modulation selon une loi de probabilité non uniforme et un flux binaire. Selon le procédé de l'invention également, l'extrémité d'envoi envoie la trame de données de couche physique à une extrémité de réception, et l'extrémité de réception : reçoit la trame de données de couche physique, détermine le paramètre de démodulation d'après les informations d'indication, et exécute une démodulation des données selon une loi de probabilité non uniforme d'après le paramètre de démodulation. La présente invention se rapporte au domaine technique des communications.
PCT/CN2019/082343 2018-04-12 2019-04-12 Procédé et appareil de transmission de données modulées selon une loi de probabilité non uniforme WO2019196913A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US17/046,500 US11303498B2 (en) 2018-04-12 2019-04-12 Data transmission method and apparatus based on probability non-uniform modulation
JP2020555494A JP7118168B2 (ja) 2018-04-12 2019-04-12 確率不均一変調に基づくデータ送信方法及び装置
KR1020207028300A KR102430191B1 (ko) 2018-04-12 2019-04-12 확률 불균일 변조에 기초한 데이터 전송 방법 및 장치
EP19785349.2A EP3754923A4 (fr) 2018-04-12 2019-04-12 Procédé et appareil de transmission de données modulées selon une loi de probabilité non uniforme

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CN201810327455 2018-04-12
CN201810327455.2 2018-04-12
CN201810847877.2A CN110380999B (zh) 2018-04-12 2018-07-27 概率非均匀调制的数据传输方法及装置
CN201810847877.2 2018-07-27

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