WO2022089137A1 - Procédé de codage, procédé de décodage, dispositif associé, et support de stockage - Google Patents

Procédé de codage, procédé de décodage, dispositif associé, et support de stockage Download PDF

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Publication number
WO2022089137A1
WO2022089137A1 PCT/CN2021/121565 CN2021121565W WO2022089137A1 WO 2022089137 A1 WO2022089137 A1 WO 2022089137A1 CN 2021121565 W CN2021121565 W CN 2021121565W WO 2022089137 A1 WO2022089137 A1 WO 2022089137A1
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msb
lsb
payload
overhead
demodulated
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PCT/CN2021/121565
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English (en)
Chinese (zh)
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肖世尧
于鸿晨
张力
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华为技术有限公司
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Publication of WO2022089137A1 publication Critical patent/WO2022089137A1/fr

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    • 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
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • 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

Definitions

  • the present application relates to the field of communications, and in particular, to an encoding method, a decoding method, a related device, and a storage medium.
  • MCM Multilevel coded modulation
  • the transmitting device encodes the input payload to obtain the most significant bit (most significant bit, MSB) payload and MSB overhead, and the least significant bit (least significant bit, LSB) payload and LSB overhead.
  • MSB payload, MSB overhead, LSB payload and LSB overhead are mapped onto a constellation map for sending to the receiving device.
  • the MSB payload has undergone constellation shaping, so that bits 0 and 1 included in the MSB payload are distributed with unequal probability.
  • bits 0 and 1 included in the MSB overhead are roughly distributed with equal probability.
  • the constellation mapping of the MSB payload and the MSB overhead will cause the constellation points mapped by the MSB payload and the MSB overhead to deviate from the central area of the constellation diagram. , so that the purpose of reducing the transmit power of the signal cannot be achieved, and the constellation shaping performance is degraded.
  • the present application provides an encoding method, a decoding method, a related device, and a storage medium, which are used for reducing the transmission power of a signal.
  • an embodiment of the present invention provides an encoding method, the method includes: a sending device determines a most significant MSB according to transmission data, where the MSB includes at least part of the payload of the transmission data; the sending device encodes the MSB to obtain the MSB overhead; the sending device obtains the least significant bit LSB based on the MSB overhead, the LSB includes at least the MSB overhead; the sending device sends a transmission frame to the receiving device, and the MSB and the LSB are respectively located in different lines of the transmission frame.
  • the MSB payload and the MSB overhead are located in different lines of the transmission frame, that is, the MSB overhead is merged into the LSB of the transmission frame. It can be seen that when the MSB payload has an unequal probability distribution of bits 0 and 1, and the MSB overhead has an equal probability distribution of bits 0 and 1, since the MSB payload and MSB overhead are located in different lines of the transmission frame, the When the MSB of the transmission frame is mapped to the constellation point, the constellation-shaped MSB payload can be successfully mapped to the central area of the constellation, effectively reducing the probability that the constellation point mapped by the MSB payload deviates from the central area of the constellation. The amplitude of transmitting the MSB is effectively reduced, the transmission power is reduced, and the deterioration of the constellation shaping performance is effectively avoided.
  • the sending device determining the MSB according to the transmission data includes: the sending device divides the transmission data into MSB payload and LSB payload, wherein the MSB payload is the constellation-shaped payload; the sending device determines that at least part of the payload of the transmission data is the MSB payload.
  • the MSB of the transmission frame only includes the MSB payload, and the MSB has lower overhead and bit error rate before correction, which can effectively improve the efficiency and accuracy of decoding the MSB by the receiving device.
  • the sending device obtaining the least significant bit LSB based on the MSB overhead includes: the sending device encodes the MSB overhead and the LSB payload to obtain the LSB overhead; the sending device It is determined that the LSB includes the LSB payload, the MSB overhead, and the LSB overhead.
  • At least part of the payload of the transmission data is the entire payload of the transmission data, and the entire payload of the transmission data is the constellation-shaped payload.
  • the LSB of the transmission frame does not need to include the payload of the transmitted data, the LSB only includes the overhead. It can be seen that the LSB shown in this implementation can carry a larger overhead (ie MSB overhead and LSB overhead) compared to the existing LSB. . By carrying the LSB with greater overhead, the transmission frame has a greater error correction capability, which can effectively improve the accuracy and efficiency of decoding the transmission data, and reduce the bit error rate of decoding the transmission frame.
  • the sending device obtaining the least significant bit LSB based on the MSB overhead includes: the sending device encodes the entire payload of the transmission data to obtain the MSB overhead; the sending device obtains the MSB overhead; The MSB overhead is encoded to obtain the LSB overhead; the transmitting device determines that the LSB includes the MSB overhead and the LSB overhead.
  • an embodiment of the present invention provides a decoding method, the method includes: a receiving device receives a transmission frame from a sending device, where the transmission frame includes a least significant bit LSB and a most significant bit MSB, the MSB and the LSB are respectively located in In different lines of the transmission frame, the MSB includes at least part of the payload of the transmission data; the receiving device demodulates the LSB to obtain the demodulated LSB, and the demodulated LSB at least includes the demodulated MSB overhead; the receiving device The demodulated LSB is decoded to obtain the decoded LSB, and the decoded LSB at least includes the decoded MSB overhead; the receiving device demodulates the MSB through the decoded LSB to obtain the demodulated MSB; the receiving device The decoded MSB overhead and the demodulated MSB are decoded to obtain the transmission data.
  • At least part of the payload of the transmission data is the MSB payload of the transmission data
  • the demodulated LSB includes the demodulated LSB payload, the demodulated LSB overhead and the
  • the receiving device decoding the demodulated LSB to obtain the decoded LSB includes: the receiving device decoding the demodulated LSB to obtain the decoded LSB payload, the decoded LSB overhead and the decoded LSB.
  • Decoded MSB overhead; the receiving device decoding the decoded MSB overhead and the demodulated MSB to obtain transmission data includes: the receiving device decodes the decoded MSB overhead and the demodulated MSB to obtain the decoded MSB payload, wherein the decoded MSB payload is a constellation-shaped payload; the receiving device combines the decoded LSB payload and the decoded MSB payload to obtain the entire payload of the transmission data.
  • At least part of the payload of the transmission data is the entire payload of the transmission data
  • the demodulated LSB includes the demodulated LSB overhead and the demodulated MSB overhead
  • an embodiment of the present invention provides a sending device, the sending device includes: a first determination module, configured to determine the most significant bit MSB according to transmission data, where the MSB includes at least part of the payload of the transmission data; an encoding module , used to encode the MSB to obtain the MSB overhead; the second determination module is used to obtain the least significant bit LSB based on the MSB overhead, where the LSB at least includes the MSB overhead; the sending module is used to send to the receiving device A transmission frame, the MSB and the LSB are located in different lines of the transmission frame, respectively.
  • the first determining module is specifically configured to: divide the transmission data into an MSB payload and an LSB payload, where the MSB payload is a constellation-shaped payload ; determine that at least part of the payload of the transmission data is the MSB payload.
  • the second determining module is specifically configured to: encode the MSB overhead and the LSB payload to obtain the LSB overhead; determine that the LSB includes the LSB payload, the MSB overhead and this LSB overhead.
  • At least part of the payload of the transmission data is the entire payload of the transmission data, and the entire payload of the transmission data is the constellation-shaped payload.
  • the second determining module is specifically configured to: encode the entire payload of the transmission data to obtain the MSB overhead; encode the MSB overhead to obtain the LSB overhead; determine The LSB includes the MSB overhead and the LSB overhead.
  • an embodiment of the present invention provides a receiving device, the receiving device includes: a receiving module configured to receive a transmission frame from a sending device, the transmission frame including the least significant bit LSB and the most significant bit MSB, the The MSB and the LSB are respectively located in different lines of the transmission frame, and the MSB includes at least part of the payload of the transmission data; the first demodulation module is configured to demodulate the LSB to obtain the demodulated LSB, the demodulation module The post-modulation LSB at least includes the MSB overhead after demodulation; the first decoding module is used for decoding the post-demodulation LSB to obtain the post-decoding LSB, and the decoded LSB at least includes the MSB post-decoding overhead; the second demodulation module, using The MSB is demodulated by the decoded LSB to obtain the demodulated MSB; the second decoding module is used for decoding the decoded MSB overhead and the demodulated MSB to obtain
  • At least part of the payload of the transmission data is the MSB payload of the transmission data
  • the demodulated LSB includes the demodulated LSB payload, the demodulated LSB overhead and The demodulated MSB overhead
  • the first decoding module is specifically used for decoding the demodulated LSB to obtain the decoded LSB payload, the decoded LSB overhead and the decoded MSB overhead
  • the second decoding module is specifically used for In: the decoded MSB overhead and the demodulated MSB are decoded to obtain the decoded MSB payload, wherein the decoded MSB payload is a constellation shaped payload; the decoded LSB payload and the decoded The MSB payloads are combined to obtain the entire payload of the transmitted data.
  • At least part of the payload of the transmission data is the entire payload of the transmission data
  • the demodulated LSB includes the demodulated LSB overhead and the demodulated MSB overhead
  • the first decoding module is specifically used to decode the demodulated LSB to obtain the decoded LSB overhead and the decoded MSB overhead
  • the second decoding module is specifically used to decode the decoded MSB overhead and the demodulated MSB overhead
  • the MSB performs decoding to obtain the entire payload of the transmission data, which is the constellation-shaped payload.
  • an embodiment of the present invention provides a sending device, including a processor, a memory, and a transmitter, where the processor is respectively interconnected with the memory and the transmitter through a line; the transmitter is used to send a transmission frame to a receiving device,
  • the processor is configured to call the program code in the memory to execute the method shown in any one of the above-mentioned first aspect.
  • an embodiment of the present invention provides a receiving device, including a processor, a memory, and a receiver, where the processor is respectively interconnected with the memory and the receiver through a line; the receiver is configured to receive a transmission frame from a sending device , the processor is configured to call the program code in the memory to execute the method shown in any one of the second aspect above.
  • an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by hardware, is used to execute the method shown in any one of the above-mentioned second aspects .
  • an embodiment of the present invention provides a communication system, where the communication system includes a sending device and a receiving device, where the sending device is as shown in any one of the third aspect above, and the receiving device is as shown in any one of the fourth aspect above shown.
  • Fig. 1 is a first example diagram of a constellation diagram provided by this application
  • FIG. 2 is an exemplary structural diagram of an embodiment of a communication system provided by an existing solution
  • Fig. 3 is a kind of frame structure of existing transmission frame
  • Fig. 4 is a flow chart of the steps of the first embodiment of the method provided by the present invention.
  • FIG. 5 is an exemplary diagram of a first embodiment of constellation mapping provided by the present invention.
  • FIG. 6 is an exemplary diagram of a second embodiment of constellation mapping provided by the present invention.
  • FIG. 7 is a structural example diagram of a first embodiment of a communication system provided by the present invention.
  • FIG. 8 is a flow chart of the steps of the second embodiment of the method provided by the present invention.
  • FIG. 9 is an exemplary diagram of an embodiment of a transmission frame provided by the present invention.
  • FIG. 10 is a structural example diagram of the second embodiment of the communication system provided by the present invention.
  • FIG. 11 is a structural example diagram of the first embodiment of the sending device provided by the present invention.
  • FIG. 12 is a structural example diagram of the first embodiment of the receiving device provided by the present invention.
  • FIG. 13 is a structural example diagram of the second embodiment of the sending device provided by the present invention.
  • FIG. 14 is a structural example diagram of the second embodiment of the receiving device provided by the present invention.
  • High-dimensional modulation refers to a modulation mode with spectral efficiency ⁇ 3 bits, that is, the number of constellation points in the modulation constellation diagram is greater than or equal to 8, that is, at least 3 bits are mapped to one constellation point.
  • the MCM needs to divide the constellation points in the multi-level coding (MLC) constellation diagram layer by layer, and the division method is described below.
  • MLC multi-level coding
  • FIG. 1 A typical MLC constellation diagram of 16 quadrature amplitude modulation (quadrature amplitude modulation, QAM) modulation is shown in FIG. 1 , which is the first example diagram of the constellation diagram provided by this application.
  • QAM quadrature amplitude modulation
  • the constellation diagram shown in FIG. 1 includes 16 constellation points. Specifically, the transmitting device modulates the transmission data to be divided into two paths, one for in-phase (I) and the other for quadrature (Q), both I and Q. The components are orthogonal and independent of each other.
  • each channel gives 2 bits of data at a time, and the 2-bit binary has 4 different states, corresponding to 4 different level amplitudes, so that I has 4 different amplitude levels , Q has 4 levels of different amplitudes, and the I and Q signals are in quadrature.
  • any combination of the amplitude of I and the amplitude of any Q will map a corresponding constellation point, each constellation point represents a mapping composed of 4-bit data, I and Q have a total of 4 ⁇ 4, a total of 16 combination states , various possible data state combinations are mapped onto the constellation diagram including 16 constellation points shown in the constellation diagram shown in FIG. 1 .
  • the coordinate of the constellation point mapped by the bit 0111 is -3+3j
  • the coordinate of the constellation point mapped by the bit 0000 is 1+1j.
  • the sending device divides the 16 constellation points included in the constellation map into 4 groups, such as group 101 including four constellation points whose coordinates are -3+3j, 1+3j, 1-1j and -3-1j respectively.
  • grouping 102 includes four constellation points whose coordinates are -1+3j, 3+3j, -1-1j, and 3-1j, respectively.
  • grouping 103 includes four constellation points whose coordinates are -3+1j, 1+1j, 1-3j and -3-3j respectively.
  • the grouping 104 includes four constellation points whose coordinates are -1+1j, 3+1j, 3-3j, and -1-3j, respectively.
  • Each constellation point in the grouping 101 is used to map a bit group, and in this example, the bit group includes 4 bits of data as an example. It can be seen that the bit data included in the mapped bit groups of the constellation points included in the group 101 are: 0111, 0101, 0100, and 0110, respectively.
  • each bit group mapped to group 102 the first two bits are consistent, both being 11.
  • Mapped to each bit group in group 103 the first two bits are consistent and both are 00.
  • Mapped to each bit group in group 104 the first two bits are consistent, both being 10. However, they are respectively mapped to the bit group 102, the group 103 and the group 104, and the latter two bits are different.
  • bits included in the mapped bit grouping of each constellation point are b0 b1 b2 b3, then the mapped b0 b1 of the constellation points located in the same group are the same, but the b2 b3 are different.
  • b0 b1 are LSB
  • b2 b3 are MSB.
  • the LSB is used to identify the group number of the constellation point in the constellation diagram. For example, if the bit included in the LSB is 01, it means that the constellation point belongs to group 101. For another example, if the bit included in the LSB is 10, then It is stated that the constellation point belongs to group 104 .
  • the MSB is used to identify the intra-group number of the constellation points, so as to distinguish different constellation points in the same group by the MSB.
  • FIG. 2 is an embodiment structure of the communication system provided by the existing solution. sample graph.
  • the transmission device 210 includes a demultiplexer 211 , an MSB encoder 212 , an LSB encoder 213 , a constellation mapper 214 and a modulator 215 .
  • the demultiplexer 211 is respectively connected to the MSB encoder 212 and the LSB encoder 213 , and both the MSB encoder 212 and the LSB encoder 213 are connected to the constellation mapper 214 , and the constellation mapper 214 is connected to the modulator 215 .
  • the demultiplexer 211 is used for dividing the transmission data into MSB payload (Payload) and LSB payload, the demultiplexer 211 is also used for sending the MSB payload to the MSB encoder 212, and the LSB payload Sent to LSB encoder 213.
  • the MSB encoder 212 is used to encode the MSB payload to obtain the MSB overhead (OH), the MSB payload and the MSB overhead as the MSB, and the MSB encoder 212 sends the MSB to the constellation mapper 214 .
  • the LSB encoder 213 is used to encode the LSB payload to obtain the LSB overhead, the LSB payload and the LSB overhead are taken as LSBs, and the LSB encoder 213 sends the LSBs to the constellation mapper 214 .
  • the constellation mapper 214 is used to map the transmission frame onto the constellation diagram shown in FIG. 1 , and the frame structure of the transmission frame is shown in FIG. 3 .
  • the MSB of the transport frame used for mapping to the constellation includes the MSB payload and the MSB overhead
  • the LSB of the transport frame includes the LSB payload and the LSB overhead.
  • the modulator 215 is used for modulating the constellation points to obtain modulation symbols, and the modulator 215 can send the modulation symbols to the receiving device 230, wherein, in the modulation symbols, different constellation points transmit the modulation symbols to the receiving device 230 through different time slots to transmit.
  • the receiving device 230 includes an LSB demodulator 231 , an LSB decoder 232 , an MSB demodulator 233 , an MSB decoder 234 , and a combining unit 235 .
  • the LSB demodulator 231 , the LSB decoder 232 and the merging unit 235 are connected in sequence, the MSB demodulator 233 , the MSB decoder 234 and the merging unit 235 are connected in sequence, and the LSB decoder 232 is connected with the MSB demodulator 233 .
  • the LSB demodulator 231 is used to demodulate the LSB of the modulation symbol to obtain the demodulated LSB.
  • the LSB demodulator 231 is also used to send the demodulated LSB to the LSB decoder 232 .
  • the LSB decoder 232 decodes the demodulated LSB to obtain the decoded LSB payload and the decoded LSB overhead.
  • the LSB decoder 232 is also used to send the decoded LSB payload and the decoded LSB overhead to the MSB demodulator 233 .
  • the MSB demodulator 233 is configured to demodulate the MSB of the modulation symbol based on the decoded LSB payload and the decoded LSB overhead to obtain the demodulated MSB.
  • the MSB demodulator 233 is further configured to send the demodulated MSB to the MSB decoder 234, where the demodulated MSB includes the demodulated MSB payload and the demodulated MSB overhead.
  • the MSB decoder 234 is used to decode the demodulated MSB overhead and the demodulated MSB payload to obtain the decoded MSB payload.
  • the merging unit 235 is used to obtain the decoded LSB payload from the LSB decoder 232 and the decoded MSB payload from the MSB decoder 234, and the merging unit 235 is also used to combine the decoded LSB payload and the decoded MSB payload. to get transfer data.
  • the sending device performs constellation shaping on the MSB payload.
  • constellation shaping in detail:
  • the sending device performs constellation shaping on the MSB payload, so that the number of bits 0 included in the constellation-shaped MSB payload is greater than the number of bits 1 included in the MSB payload.
  • the amplitude used for sending bit 0 is smaller than the amplitude used for sending bit 1, it can be seen that when the number of bits 0 included in the MSB payload after constellation shaping is greater than the number of bits 1 included in the MSB payload, it can be The amplitude of transmitting the MSB is effectively reduced, thereby effectively reducing the transmit power.
  • the MSBs in the bit packets mapped by the four constellation points located in the central area of the constellation are all 00. It can be seen that if the transmission The data is transmitted with high probability through the four constellation points located in the central area of the constellation diagram, which effectively reduces the amplitude of the transmitted data and reduces the transmission power.
  • the MSB payload can be mapped to the four constellation points in the central area of the constellation diagram with a high probability, so that the bits 0 and 1 included in the MSB payload are unequal. Probability distribution (ie guarantees that the number of bits 0 is greater than the number of bits 1). However, bits 0 and 1 included in the MSB overhead are equally distributed.
  • the MSB In the case where the bits 0 and 1 included in the MSB payload are distributed with unequal probability, and the bits 0 and 1 included in the MSB overhead are distributed with equal probability, the MSB cannot be mapped to the central region of the constellation. At the constellation point, the MSB deviates from the optimal distribution of the constellation diagram, and the amplitude of the transmitted MSB cannot be reduced, and thus the transmission power cannot be reduced.
  • the method provided by the present application can effectively reduce the probability that the MSB of the transmission data deviates from the middle area of the constellation diagram, thereby effectively reducing the amplitude and transmission power of the transmission data.
  • FIG. 4 is a flowchart of steps of the first embodiment of the method provided by the present application.
  • Step 401 The sending device divides the transmission data into MSB payload and LSB payload.
  • the sending device shown in this embodiment demultiplexes the transmission data to obtain the MSB payload and the LSB payload.
  • the sending device shown in this embodiment performs constellation shaping on the MSB payload, To ensure that the number of bits 0 included in the MSB is greater than the number of bits 1, so that the bits 0 and 1 included in the MSB payload are distributed with unequal probability.
  • Do repeat please refer to the relevant description shown in Figure 2.
  • the MSB payload is constellation-shaped payload as an example for illustrative description. In other examples, the MSB payload may not be constellation-shaped, which is not specifically limited in this embodiment.
  • Step 402 The sending device determines that the MSB includes the MSB payload.
  • the difference between the MSB shown in this embodiment and the MSB shown in FIG. 3 is that the MSB shown in FIG. 3 includes the MSB payload and the MSB overhead, and this embodiment can determine the MSB payload when the MSB payload is obtained.
  • the MSB of the transmission frame includes only the MSB payload.
  • FIG. 5 Please refer to FIG. 5 for the frame structure of the transmission frame shown in this embodiment. It can be seen that the MSB of the transmission frame 501 only includes the MSB payload.
  • Step 403 The sending device encodes the MSB to obtain the MSB overhead.
  • the sending device encodes the MSB including the MSB payload only to obtain the MSB overhead.
  • the sending device may encode the MSB payload in a forward error correction (forward error correction, FEC) encoding manner to obtain the MSB overhead.
  • FEC forward error correction
  • Step 404 The sending device encodes the MSB overhead and the LSB payload to obtain the LSB overhead.
  • the sending device encodes the acquired LSB payload and MSB overhead to obtain the LSB overhead.
  • the description of encoding the LSB payload and MSB overhead please refer to the process of encoding the MSB for details. Do repeat.
  • Step 405 The sending device determines that the LSB includes the LSB payload, the MSB overhead, and the LSB overhead.
  • the LSB shown in FIG. 3 includes the LSB payload and the LSB overhead, while the LSB of the transmission frame shown in FIG. 5 includes the LSB payload, the MSB overhead, and the LSB overhead.
  • the LSB overhead shown in FIG. 3 is generated by encoding the LSB payload, and the LSB overhead shown in this embodiment is generated by encoding the MSB overhead and the LSB payload.
  • Step 406 The sending device sends a transmission frame to the receiving device.
  • the MSB and LSB shown in this embodiment are located in different rows of the transmission frame.
  • the transmitting device When the transmitting device obtains the transmission frame, the transmitting device can map each bit group of the transmission frame to the constellation point.
  • the sending device determines that each bit group includes 4 bits, and the sending device can map every 4 bits included in the transmission frame to the constellation points included in the constellation.
  • the transmitting device maps the bit group to the constellation point with coordinates -1+1j.
  • the transmitting device modulates the constellation points to generate modulation symbols for transmission to the receiving device.
  • the description of the constellation diagram of the transmitting device in this embodiment is an optional example and is not limited.
  • the constellation diagram of the transmitting device can also be 64QAM, and the constellation diagram of the 64QAM includes 64 constellation points, It is clear that, in this embodiment, the description of the number of bits included in the LSB and the number of bits included in the MSB of the transmission frame is an optional example, which is not specifically limited.
  • the bit grouping mapped by each constellation point includes 6 bits, that is, b0 b1 b2 b3 b4 b5, where b0 b1 is the LSB, and b2 b3 b4 b5 is the MSB.
  • the number of bits included in the LSB may also be greater than 2 bits or less than 2 bits, which is not specifically limited.
  • the constellation diagram of 64QAM can be divided into four groups, and each group includes 16 constellation points.
  • LSB is 01.
  • the structure of the transmission frame used for mapping to the constellation diagram of 64QAM can be seen in Figure 6. It can be seen that the MSB of the transmission frame 601 only includes the MSB payload of the transmission data, and the LSB includes the LSB payload, MSB overhead and LSB overhead.
  • the MSB of the transmission frame 601 only includes the MSB payload of the transmission data
  • the LSB includes the LSB payload, MSB overhead and LSB overhead.
  • the sending device maps the bit group to the constellation point with coordinates 1+3j.
  • the transmitting device modulates the constellation points to generate modulation symbols for transmission to the receiving device.
  • the description of the constellation diagram in this embodiment is an optional example and is not limited, as long as the MSB payload and the MSB overhead are located in different rows of the transmission frame in the transmission frame generated by the encoding process shown in this embodiment. It can be seen that when the MSB payload has an unequal probability distribution of bits 0 and 1, and the MSB overhead has an equal probability distribution of bits 0 and 1, since the MSB payload and MSB overhead are located in different lines of the transmission frame, the When the MSB of the transmission frame is mapped to the constellation point, the constellation-shaped MSB payload can be successfully mapped to the central area of the constellation, effectively reducing the probability that the constellation point mapped by the MSB payload deviates from the central area of the constellation, The amplitude of transmitting the MSB is effectively reduced, the transmission power is reduced, and the deterioration of the constellation shaping performance is effectively avoided.
  • Step 407 The receiving device demodulates the LSB of the transmission frame to obtain the demodulated LSB.
  • the receiving device can obtain the demodulated LSB payload, the demodulated MSB overhead, and the demodulated LSB overhead by demodulating the LSB of the transmission frame.
  • Step 408 The receiving device decodes the demodulated LSB to obtain the decoded LSB.
  • the receiving device decodes the demodulated LSB payload, the demodulated MSB overhead, and the demodulated LSB overhead to obtain the decoded LSB payload, the decoded MSB overhead, and the decoded LSB overhead.
  • Step 409 The receiving device demodulates the MSB through the decoded LSB to obtain the demodulated MSB.
  • the accuracy of demodulating the MSB is effectively improved.
  • the MSB after demodulation includes the payload of the MSB after demodulation.
  • the advantage of demodulating the MSB by using the decoded LSB is that the accuracy of demodulating the MSB can be effectively improved, so that the MSB has a lower transmission bit error rate.
  • Demodulation of MSB by LSB after decoding can significantly reduce the power consumption of MSB demodulation and improve demodulation. accuracy.
  • the decoded bit is 01 for the LSB of a bit group, it means that the four mapped bits of the constellation point are located in group 101, then the possibility of the value included in the MSB is There are four kinds, namely 11, 01, 10 and 00. It can be seen that the receiving device only needs to demodulate the MSB in these four values of the MSB, which effectively improves the accuracy and efficiency of demodulating the MSB.
  • Step 410 The receiving device decodes the demodulated MSB overhead and the demodulated MSB payload to obtain the decoded MSB payload.
  • Step 411 The receiving device acquires the transmission data.
  • the receiving device combines the decoded LSB payload and the decoded MSB payload to obtain the transmission data.
  • the MSB payload and the MSB overhead are located in different lines of the transmission frame, that is, the MSB overhead is merged into the LSB of the transmission frame. It can be seen that when the MSB payload has an unequal probability distribution of bits 0 and 1, and the MSB overhead has an equal probability distribution of bits 0 and 1, since the MSB payload and MSB overhead are located in different lines of the transmission frame, the When the MSB of the transmission frame is mapped to the constellation point, the constellation-shaped MSB payload can be successfully mapped to the central area of the constellation, effectively reducing the probability that the constellation point mapped by the MSB payload deviates from the central area of the constellation. The amplitude of transmitting the MSB is effectively reduced, the transmission power is reduced, and the deterioration of the constellation shaping performance is effectively avoided.
  • the number of LSBs is less than or equal to the number of MSBs.
  • one bit grouping includes two LSBs and two MSBs, while in the 64QAM constellation In the figure, one bit group includes two LSBs and four MSBs. It can be seen that in the entire transmission data, the LSB traffic accounts for a relatively small proportion of the total traffic of the transmitted data, which effectively reduces the bit error rate of decoding the LSB.
  • the receiving device can decode the LSB through a low-complexity decoding algorithm, thereby effectively reducing the power consumption of decoding the LSB and improving the efficiency of decoding the LSB.
  • the MSB of the transmission frame shown in this embodiment only includes the MSB payload. It can be seen that the MSB has lower overhead and pre-correction error rate, and can effectively improve the efficiency and accuracy of decoding the MSB by the receiving device.
  • the sending device 710 shown in this embodiment includes a demultiplexer 711 , an MSB encoder 712 , an LSB encoder 713 , a constellation mapper 714 , and a modulator 715 .
  • the difference between the sending device 710 shown in this embodiment and the sending device 210 shown in FIG. 2 is that the MSB encoder 712 is connected to the LSB encoder 713 .
  • each device included in the communication system shown in this embodiment may be a chip or an integrated circuit.
  • the functions of each device may be partially or completely implemented by software, which is not specifically limited in this embodiment.
  • the functions of each device are partially or completely implemented by software as an example
  • the sending device 710 and the receiving device 730 may include a processor and a memory, wherein the memory is used to store a computer program, and the processor reads and executes the stored in the memory.
  • each component included in the sending device 710 and the receiving device 730 in this embodiment is an optional example, as long as the sending device 710 and the receiving device 730 can implement the method shown in FIG. 4 .
  • the demultiplexer 711 of the sending device 710 is configured to perform step 401 . That is, the demultiplexer 711 is configured to divide the transmission data into the MSB payload and the LSB payload, send the MSB payload to the MSB encoder 712 , and also transmit the LSB payload to the LSB encoder 713 .
  • the MSB encoder 712 is configured to perform steps 402 to 403 , the MSB encoder 712 is connected to the LSB encoder 713 , and the MSB encoder 712 is further configured to send the MSB overhead to the LSB encoder 713 .
  • the LSB encoder 713 is used to perform steps 404 to 405 .
  • the constellation mapper 714 and the modulator 715 are jointly used to perform step 406, specifically, the constellation mapper 714 is used to map the MSBs from the MSB encoder 712 and the LSBs from the LSB encoder 713 to corresponding constellations Point.
  • the modulator 715 is used to modulate the constellation points to generate modulation symbols, which are sent to the receiving device 730 through the channel 720 .
  • the receiving device 730 includes an LSB demodulator 731 , an LSB decoder 732 , an MSB demodulator 733 , an MSB decoder 734 , and a combining unit 735 .
  • the difference between the receiving device 730 shown in this embodiment and the receiving device 230 shown in FIG. 2 is that the LSB decoder 732 is also connected to the MSB decoder 734 .
  • the LSB demodulator 731 of the receiving device 730 is configured to execute step 407 and to send the demodulated LSB to the LSB decoder 732 .
  • the LSB decoder 732 is used for performing step 408 , and the LSB decoder 732 is also used for sending the decoded LSB to the MSB demodulator 733 .
  • the LSB demodulator 731 is further configured to send the MSB to the MSB demodulator 733 , and the MSB demodulator 733 is configured to perform step 409 .
  • the MSB demodulator 733 is used to send the demodulated MSB to the MSB decoder 734 .
  • the LSB decoder 732 is configured to send the decoded MSB overhead to the MSB decoder 734 , and the MSB decoder 734 is configured to perform step 410 .
  • the merging unit 735 is used to execute step 411 .
  • Step 801 The sending device determines that the MSB includes the entire payload of the transmission data.
  • the sending device does not need to divide the transmission data, but determines that the MSB of the transmission frame includes the entire payload of the transmission data.
  • the frame structure of the transmission frame can be referred to as shown in FIG. 9 , and it can be known that the MSB of the transmission frame 901 includes the entire payload of the transmission data.
  • the entire payload of the transmission data shown in this embodiment is the payload that has undergone constellation shaping .
  • the entire payload of the transmission data is the constellation-shaped payload as an example for illustration.
  • the entire payload of the transmission data may also be the payload that is not constellation-shaped.
  • the example is not limited.
  • Step 802 The sending device encodes the MSB to obtain the MSB overhead.
  • step 802 For the specific execution process of step 802 shown in this embodiment, please refer to step 403 shown in FIG. 4 , and the specific execution process will not be repeated in this embodiment.
  • Step 803 The sending device encodes the MSB overhead to obtain the LSB overhead.
  • the MSB overhead when the sending device obtains the MSB overhead, the MSB overhead can be encoded to obtain the LSB overhead.
  • Step 804 The sending device determines that the LSB includes the MSB overhead and the LSB overhead.
  • the LSB of the transmission frame 901 shown in this embodiment includes the MSB overhead and the LSB overhead.
  • the LSB shown in FIG. 3 includes the LSB payload and the LSB overhead, while the LSB of the transmission frame shown in FIG. 9 includes the MSB overhead and the LSB overhead, that is, the LSB shown in this embodiment does not include the payload.
  • the LSB overhead shown in FIG. 3 is generated by encoding the LSB payload, and the LSB overhead shown in this embodiment is generated by encoding the MSB overhead.
  • Step 805 The sending device sends a transmission frame to the receiving device.
  • step 805 For the execution process of step 805 shown in this embodiment, please refer to step 406 shown in FIG. 4 , and details are not repeated in this embodiment.
  • Step 806 The receiving device demodulates the LSB of the transmission frame to obtain the demodulated LSB.
  • the receiving device can obtain the LSB overhead after demodulation and the MSB overhead after demodulation by demodulating the LSB of the transmission frame.
  • step 407 shown in FIG. 4 For the description of the specific process of LSB demodulation performed by the receiving device shown in this embodiment, please refer to step 407 shown in FIG. 4 , and details are not repeated in this embodiment.
  • Step 807 The receiving device decodes the demodulated LSB to obtain the decoded LSB.
  • the receiving device decodes the demodulated MSB overhead and the demodulated LSB overhead to obtain the decoded MSB overhead and the decoded LSB overhead.
  • Step 808 The receiving device demodulates the MSB through the decoded LSB to obtain the demodulated MSB.
  • the demodulated MSB shown in this embodiment includes the entire payload of the demodulated transmission data.
  • the receiving device shown in this embodiment demodulates the modulation symbol for the first time in step 806, and demodulates the modulation symbol for the second time in step 808. By demodulating the modulation symbol twice It can effectively improve the accuracy of demodulation.
  • Step 809 The receiving device decodes the decoded MSB overhead and the demodulated MSB to obtain transmission data.
  • the receiving device can directly obtain the entire payload of the transmission data by decoding the MSB.
  • the LSB of the transmission frame does not need to include the payload of the transmission data, the LSB only includes the overhead. It can be seen that the LSB shown in this embodiment can carry a larger overhead than the existing LSB (i.e. MSB overhead and LSB overhead). By carrying the LSB with greater overhead, the transmission frame has a greater error correction capability, which can effectively improve the accuracy and efficiency of decoding the transmission data, and reduce the bit error rate of decoding the transmission frame.
  • the transmitting device 1010 shown in this embodiment includes an MSB encoder 1011 , an LSB encoder 1012 , a constellation mapper 1013 , and a modulator 1014 .
  • the difference between the sending device 1010 shown in this embodiment and the sending device 710 shown in FIG. 7 is that the sending device 1010 shown in this embodiment does not need to set a demultiplexer.
  • the MSB encoder 1011 shown in this embodiment is configured to perform steps 801 to 802 , and the MSB encoder 1011 is further configured to send the MSB overhead to the LSB encoder 1012 .
  • the LSB encoder 1012 is used to perform steps 803 to 804 .
  • the constellation mapper 1013 and the modulator 1014 are jointly used to perform step 805, specifically, the constellation mapper 1013 is used to map the MSB from the MSB encoder 1011 and the LSB from the LSB encoder 1012 to the corresponding On the constellation point.
  • the modulator 1014 is used to modulate the constellation points to generate modulation symbols, which are sent to the receiving device 1030 through the channel 1020 .
  • the receiving device 1030 includes an LSB demodulator 1031 , an LSB decoder 1032 , an MSB demodulator 1033 , and an MSB decoder 1034 .
  • the difference between the receiving device 1030 shown in this embodiment and the receiving device shown in FIG. 7 is that the receiving device 1030 shown in this embodiment does not need to set a combining unit.
  • the LSB demodulator 1031 of the receiving device 1030 is configured to execute step 806 and to send the demodulated LSB to the LSB decoder 1032 .
  • the LSB decoder 1032 is configured to perform step 807, and the LSB decoder 1032 is further configured to send the decoded LSB to the MSB demodulator 1033.
  • MSB demodulator 1033 is used to perform step 808 .
  • the MSB demodulator 1033 is used to send the demodulated MSB to the MSB decoder 1034 .
  • the LSB decoder 1032 is configured to send the decoded MSB overhead to the MSB decoder 1034 , and the MSB decoder 1034 is configured to perform step 809 .
  • the sending device 1100 includes:
  • a first determining module 1101 configured to determine the most significant bit MSB according to the transmission data, where the MSB includes at least part of the payload of the transmission data;
  • an encoding module 1102 configured to encode the MSB to obtain the MSB overhead
  • a second determining module 1103, configured to obtain the least significant bit LSB based on the MSB overhead, where the LSB at least includes the MSB overhead;
  • the sending module 1104 is configured to send a transmission frame to a receiving device, where the MSB and the LSB are respectively located in different rows of the transmission frame.
  • the receiving device 1200 includes:
  • a receiving module 1201 configured to receive a transmission frame from a sending device, the transmission frame includes the least significant bit LSB and the most significant bit MSB, the MSB and the LSB are respectively located in different rows of the transmission frame, and the MSB includes at least part of the payload of the transmitted data;
  • a first demodulation module 1202 configured to demodulate the LSB to obtain the demodulated LSB, where the demodulated LSB at least includes the demodulated MSB overhead;
  • a first decoding module 1203, configured to decode the demodulated LSB to obtain the decoded LSB, where the decoded LSB at least includes the decoded MSB overhead;
  • a second demodulation module 1204 configured to demodulate the MSB through the decoded LSB to obtain the demodulated MSB;
  • the second decoding module 1205 is configured to decode the decoded MSB overhead and the demodulated MSB to obtain transmission data.
  • the first determining module 1101 included in the sending device 1100 uses In performing steps 401 and 402 , the encoding module 1102 is used for performing step 403 , the second determining module 1103 is used for performing steps 404 and 405 , and the sending module is used for performing step 406 .
  • the first demodulation module 1202 included in the receiving device 1200 is used to perform step 407, the first decoding module 1203 is used to perform step 408, and the second demodulation module 1204 is used to perform step 409, the The second decoding module 1205 is used to execute step 410 and step 411.
  • the first determining module 1101 included in the sending device 1100 uses In executing step 801 , the encoding module is configured to execute step 802 , the second determining module 1103 is configured to execute steps 803 and 804 , and the sending module 1104 is configured to execute step 805 .
  • the first demodulation module 1202 included in the receiving device 1200 is used to perform step 806, the first decoding module 1203 is used to perform step 807, and the second demodulation module 1204 is used to perform step 808, so the The second decoding module 1205 is used to execute step 809 .
  • the sending device includes a processor 1302 , a memory 1303 and a transmitter 1301 .
  • the processor 1302, the memory 1303 and the transmitter 1301 are interconnected by wires.
  • the memory 1303 is used to store program instructions and data.
  • the sending device is used to implement the steps implemented by the sending device in the embodiments shown in the above-mentioned FIG. 4 and FIG. 8 .
  • FIG. 4 and FIG. 8 For the specific execution process, please refer to FIG. 4 and FIG. 8 for details, and details are not repeated.
  • the receiving device includes a processor 1402 , a memory 1403 and a receiver 1401 .
  • the processor 1402, the memory 1403 and the receiver 1401 are interconnected by wires.
  • the memory 1403 is used for storing program instructions and data.
  • the receiving device is used to implement the steps implemented by the receiving device in the embodiments shown in FIG. 4 and FIG. 8 .
  • FIG. 4 and FIG. 8 For the specific execution process, please refer to FIG. 4 and FIG. 8 for details, and details are not repeated.
  • the embodiment of the present application also provides a chip.
  • the chip integrates a circuit and one or more interfaces for realizing the functions of the above-mentioned processor.
  • the chip can perform the method steps of any one or more of the foregoing embodiments.
  • the memory is not integrated in the chip, it can be connected with the external memory through the interface.
  • the chip implements the actions performed by the receiving device in the above embodiment according to the program codes stored in the external memory.
  • the above-mentioned processing unit or processor may be a central processing unit, a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate Array (field programmable gate array, FPGA) or other programmable logic device, transistor logic device, hardware component or any combination thereof.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the computer program product includes one or more computer instructions.
  • the procedures or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored on or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center (eg coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.

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  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé de codage, un procédé de décodage, un dispositif associé et un support de stockage, qui sont utilisés pour réduire la puissance de transmission d'un signal. Le procédé de codage comprend les étapes suivantes : un dispositif d'émission détermine un bit de poids fort (MSB) selon des données de transmission, le MSB comprenant au moins une charge utile partielle des données de transmission ; le dispositif d'émission code le MSB de façon à acquérir un surdébit de MSB ; le dispositif d'émission acquiert un bit de poids faible (LSB) sur la base du surdébit de MSB, le LSB comprenant au moins le surdébit de MSB ; et le dispositif d'émission transmet une trame de transmission à un dispositif de réception, le MSB et le LSB étant respectivement situés à l'intérieur de rangées différentes de la trame de transmission.
PCT/CN2021/121565 2020-10-28 2021-09-29 Procédé de codage, procédé de décodage, dispositif associé, et support de stockage WO2022089137A1 (fr)

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CN202011174250.9A CN114422078A (zh) 2020-10-28 2020-10-28 一种编码方法、解码方法、相关设备以及存储介质
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100223526A1 (en) * 2008-05-06 2010-09-02 Electronics And Telecommunications Research Institute Method and apparatus for channel coding and modulation for unequal error protection in transmitting uncompressed video over wideband high frequency wireless system
CN107040314A (zh) * 2016-02-03 2017-08-11 中兴通讯股份有限公司 一种业务传送的方法及装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100223526A1 (en) * 2008-05-06 2010-09-02 Electronics And Telecommunications Research Institute Method and apparatus for channel coding and modulation for unequal error protection in transmitting uncompressed video over wideband high frequency wireless system
CN107040314A (zh) * 2016-02-03 2017-08-11 中兴通讯股份有限公司 一种业务传送的方法及装置

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