WO2024051653A1 - Procédé et appareil de communication, et dispositif - Google Patents

Procédé et appareil de communication, et dispositif Download PDF

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Publication number
WO2024051653A1
WO2024051653A1 PCT/CN2023/116805 CN2023116805W WO2024051653A1 WO 2024051653 A1 WO2024051653 A1 WO 2024051653A1 CN 2023116805 W CN2023116805 W CN 2023116805W WO 2024051653 A1 WO2024051653 A1 WO 2024051653A1
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Prior art keywords
subcarriers
ratio
frequency domain
coding
subcarrier
Prior art date
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PCT/CN2023/116805
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English (en)
Chinese (zh)
Inventor
邹通
龚名新
张旭
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华为技术有限公司
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Publication of WO2024051653A1 publication Critical patent/WO2024051653A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method, device and equipment.
  • new radio (NR) technology supports orthogonal frequency division multiplexing (discrete Fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM) waveform using discrete Fourier transform spread spectrum.
  • DFT-S-OFDM waveforms can effectively reduce the peak to average power ratio (PAPR) of signals, thereby improving coverage.
  • PAPR peak to average power ratio
  • spectrum extension spectral extension
  • frequency-domain spectrum shaping frequency-domain spectrum shaping, FDSS
  • reserved subcarriers can be used to reduce the PAPR of DFT-S-OFDM.
  • FDSS/frequency domain extension/reserved subcarrier technology can effectively reduce PAPR
  • the DFT-S-OFDM waveform using FDSS/frequency domain extension/reserved subcarrier technology is different from the DFT-S-OFDM waveform that does not use FDSS/frequency domain extension/reserved subcarrier technology.
  • the spectral efficiency needs to be increased after frequency domain expansion (for example, the code rate and/or the modulation order need to be increased after frequency domain expansion ), resulting in the system's block error rate (BLER) performance loss gradually increasing, reducing the throughput during uplink transmission. Therefore, how to ensure the BLER performance of the system while reducing PAPR has become a problem to be solved.
  • BLER block error rate
  • This application provides a communication method, device and equipment, which method can optimize the PAPR performance of the transmitted waveform while ensuring the BLER performance of the system.
  • this application provides a first communication method, which can be executed by a terminal device or a network device. Among them, taking the terminal device as the execution subject and the terminal device as the transmitter of coded modulation data as an example, the terminal device determines the number of first subcarriers according to the first coded modulation parameter, and sends the first signal on the second subcarrier. .
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter; when When the number of first subcarriers is not 0, the second subcarrier includes the frequency domain extension subcarrier and the subcarrier before frequency domain extension, or the second subcarrier includes the reserved subcarrier and the pre-reservation subcarrier. subcarrier.
  • the number of first subcarriers may vary with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining greater PAPR performance gain, that is, Yes, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coding modulation parameter is determined based on downlink control information DCI used to schedule current transmission.
  • the first coding modulation parameter is used to schedule the current
  • the transmitted DCI is determined, making the first coding modulation parameter determined by the terminal device more accurate.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • this method assumes that there are at least two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set. For example, there may be only In two different coding modulation parameters, when ⁇ 1 is greater than ⁇ 2 , the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2 , and the first ratio corresponding to other coding modulation parameters may be a fixed value.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • any two different coding modulation parameters ⁇ 3 and ⁇ 4 in the first coding modulation parameter set are defined to satisfy the requirement that ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is smaller than the first ratio corresponding to ⁇ 4 .
  • the first ratio corresponding to ⁇ 3 is equal to the first ratio corresponding to ⁇ 4 .
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the relationship between the value x of the first coding modulation parameter and the first ratio ⁇ is defined through a functional relationship. For example, there is a decreasing functional relationship between the value x of the first coding modulation parameter and the first ratio ⁇ , and when the value of the first coding modulation parameter is greater than the first threshold, it means that frequency domain extension or subcarrier reservation causes PAPR If the performance loss is large, frequency domain extension or subcarrier reservation technology is no longer used to reduce PAPR (for example, the first ratio is set to 0).
  • the terminal device may also round the number N of the first subcarriers to obtain the rounded number N' of the first subcarriers, where N' is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the number of first subcarriers determined according to the first coding modulation parameter is not an integer
  • the number of first subcarriers can be rounded so that the number of first subcarriers is the number of resource blocks or An integer multiple of the number of subcarriers in a resource block is beneficial to data transmission.
  • the terminal device performs encoding and modulation processing on the data bits. Specifically, it includes the following process: determining the coding rate according to the first ratio corresponding to the first coding modulation parameter or the first ratio after rounding the number of first subcarriers; encoding the data bits according to the coding rate to obtain the coding codeword; modulate the coded codeword according to the modulation order corresponding to the MCS index to obtain modulation symbols; subject the modulation symbols to discrete Fourier transform processing to obtain frequency domain signals; perform cyclic expansion or subcarriers on the frequency domain signals Set aside processing to obtain the first signal.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the coding rate is determined based on the first ratio corresponding to the first coding modulation parameter or the first ratio corresponding to the number of first subcarriers after rounding processing, then the frequency domain extension or reserved subcarrier technology will affect Coding modulation process.
  • the method described in the first aspect above can also be executed by a network device.
  • the network device is the sender of coded and modulated data
  • the terminal device is the receiver.
  • the network device when the network device performs the method described in the first aspect, when determining the first coding modulation parameter, there is no need to determine it based on the downlink control information DCI used to schedule the current transmission.
  • the network device can directly obtain the MCS index, or Coding code rate, or modulation order.
  • this application provides a second communication method, which can be executed by a terminal device or a network device.
  • the network device taking the network device as the execution subject and the network device as the receiving end of the coded modulation data as an example, the network device determines the number of the first subcarrier according to the first coded modulation parameter, and receives the first signal on the second subcarrier. .
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter; when When the number of the first subcarriers is not 0, the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation.
  • the number of first subcarriers may vary with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining better performance. Large PAPR performance gain, that is, optimizing the PAPR performance of the transmitted waveform while ensuring the BLER performance of the system.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • this method assumes that there are at least two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set. For example, there may be only two different coding modulation parameters.
  • ⁇ 1 is greater than ⁇ 2
  • ⁇ The first ratio corresponding to 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio corresponding to other coding modulation parameters may be a fixed value.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • any two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set are defined to satisfy the requirement that ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is smaller than the first ratio corresponding to ⁇ 4 .
  • the first ratio corresponding to ⁇ 3 is equal to the first ratio corresponding to ⁇ 4 .
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the relationship between the value x of the first coding modulation parameter and the first ratio ⁇ is defined through a functional relationship. For example, there is a decreasing functional relationship between the value x of the first coding modulation parameter and the first ratio ⁇ , and when the value of the first coding modulation parameter is greater than the first threshold, it means that frequency domain extension or subcarrier reservation causes PAPR If the performance loss is large, frequency domain extension or subcarrier reservation technology is no longer used to reduce PAPR (for example, the first ratio is set to 0).
  • the network device may also round the number N of the first subcarriers to obtain the rounded number N' of the first subcarriers, where N' is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the number N of the first subcarriers determined according to the first coding modulation parameter is not an integer
  • the number N of the first subcarriers can be rounded so that the number of the first subcarriers is the number of resource blocks.
  • the number or an integer multiple of the number of subcarriers in the resource block is beneficial to data transmission.
  • the network device after receiving the first signal, performs demodulation and decoding processing on the first signal.
  • the process includes the following: performing decyclic expansion or subcarrier reservation processing on the first signal to obtain a frequency domain signal; subjecting the frequency domain signal to inverse discrete Fourier transform processing to obtain a modulation symbol; according to the modulation order corresponding to the MCS index.
  • the code rate decodes the encoded codeword to obtain data bits.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the coding rate is determined based on the first ratio corresponding to the first coding modulation parameter or the first ratio corresponding to the number of first subcarriers after rounding processing, then the frequency domain extension or reserved subcarrier technology will affect Demodulation and decoding process.
  • the method described in the second aspect above can also be executed by a terminal device.
  • the terminal device It is the receiving end of coded and modulated data
  • the network device is the sending end.
  • the terminal device may determine the first coding modulation parameter according to the downlink control information DCI used to schedule current transmission.
  • this application provides a third communication method, which can be executed by a network device.
  • the network device determines the number of first subcarriers according to the first coding modulation parameter, and sends indication information to the terminal device, where the indication information includes the number of first subcarriers or the first ratio.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the coding modulation coefficient
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the network device receives the first signal from the terminal device on the second subcarrier.
  • the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation. carrier.
  • This method can be applied to an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the network device can directly indicate the frequency domain expansion ratio or subcarrier reservation ratio to the terminal device, which facilitates the terminal device to directly encode and modulate the data bits according to the frequency domain expansion ratio or subcarrier reservation ratio to obtain The first signal.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order, or spectral efficiency.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • this method assumes that there are at least two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set. For example, there may be only two different coding modulation parameters.
  • ⁇ 1 is greater than ⁇ 2
  • ⁇ The first ratio corresponding to 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio corresponding to other coding modulation parameters may be a fixed value.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • any two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set are defined to satisfy the requirement that ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is smaller than the first ratio corresponding to ⁇ 4 .
  • the first ratio corresponding to ⁇ 3 is equal to the first ratio corresponding to ⁇ 4 .
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the relationship between the value x of the first coding modulation parameter and the first ratio ⁇ is defined through a functional relationship. For example, there is a decreasing functional relationship between the value x of the first coding modulation parameter and the first ratio ⁇ , and when the value of the first coding modulation parameter is greater than the first threshold, it means that frequency domain extension or subcarrier reservation causes PAPR If the performance loss is large, frequency domain extension or subcarrier reservation technology is no longer used to reduce PAPR (for example, the first ratio is set to 0).
  • the network device may also round the number N of the first subcarriers to obtain the rounded number N' of the first subcarriers, where N' is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the number of first subcarriers determined according to the first coding modulation parameter is not an integer
  • the number of first subcarriers can be rounded so that the number of first subcarriers is the number of resource blocks or An integer multiple of the number of subcarriers in a resource block is beneficial to data transmission.
  • the indication information also includes a first ratio corresponding to the rounded number of the first subcarriers, and the first ratio corresponding to the rounded number of the first subcarriers is the frequency domain after rounding.
  • the ratio of the number of extended subcarriers to the number of subcarriers before frequency domain expansion; or, the first ratio corresponding to the number of first subcarriers after rounding is the number of reserved subcarriers after rounding to the number of subcarriers before reservation Quantity ratio.
  • the network device performs demodulation and decoding processing on the received first signal.
  • the process includes the following: performing decyclic expansion or subcarrier reservation processing on the first signal to obtain a frequency domain signal; subjecting the frequency domain signal to inverse discrete Fourier transform processing to obtain a modulation symbol; according to the modulation order corresponding to the MCS index.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the coding rate is determined based on the first ratio corresponding to the first coding modulation parameter or the first ratio corresponding to the number of first subcarriers after rounding processing, then the frequency domain extension or reserved subcarrier technology will affect Demodulation and decoding process.
  • this application provides a fourth communication method, which can be executed by a terminal device.
  • the terminal device receives indication information from the network device, where the indication information includes the number of first subcarriers or the first ratio.
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier.
  • the number of the first subcarrier is determined based on the first coded modulation coefficient.
  • the value of the number of the first subcarrier is the same as the value of the coded modulation coefficient.
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of subcarriers before reservation.
  • the terminal device sends the first signal to the network device on the second subcarrier, wherein when the number of the first subcarrier is not 0, the second subcarrier includes the frequency domain extended subcarrier and the subcarrier before frequency domain extension. , or the second subcarrier includes the reserved subcarrier and the subcarrier before reservation.
  • This method can be applied in an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the terminal device directly receives the indication information to obtain the indicated frequency domain extension ratio or subcarrier reservation ratio, so that the terminal device directly encodes and modulates the data bits according to the frequency domain extension ratio or subcarrier reservation ratio.
  • the first signal is obtained through processing.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order, or spectrum efficiency.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • this method assumes that there are at least two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set. For example, there may be only two different coding modulation parameters.
  • ⁇ 1 is greater than ⁇ 2
  • ⁇ The first ratio corresponding to 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio corresponding to other coding modulation parameters may be a fixed value.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • any two different coding modulation parameters ⁇ 1 and ⁇ 2 in the first coding modulation parameter set are defined to satisfy the requirement that ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ratio.
  • the first ratio corresponding to ⁇ 3 is smaller than the first ratio corresponding to ⁇ 4 .
  • the first ratio corresponding to ⁇ 3 is equal to the first ratio corresponding to ⁇ 4 .
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the relationship between the value x of the first coding modulation parameter and the first ratio ⁇ is defined through a functional relationship. For example, there is a decreasing functional relationship between the value x of the first coding modulation parameter and the first ratio ⁇ , and when the value of the first coding modulation parameter is greater than the first threshold, it means that frequency domain extension or subcarrier reservation causes PAPR If the performance loss is large, frequency domain extension or subcarrier reservation technology is no longer used to reduce PAPR (for example, the first ratio is set to 0).
  • the network device may also round the number N of the first subcarriers to obtain the rounded number N' of the first subcarriers, where N' is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the number N of first subcarriers determined according to the first coding modulation parameter is not an integer
  • the number N of first subcarriers can be rounded so that the number of first subcarriers is equal to the number of resource blocks.
  • the number or an integer multiple of the number of subcarriers in the resource block is beneficial to data transmission.
  • the indication information also includes a first ratio corresponding to the rounded number of the first subcarriers, and the first ratio corresponding to the rounded number of the first subcarriers is the frequency domain after rounding.
  • the ratio of the number of extended subcarriers to the number of subcarriers before frequency domain expansion; or, the first ratio corresponding to the number of first subcarriers after rounding is the number of reserved subcarriers after rounding to the number of subcarriers before reservation Quantity ratio.
  • the terminal device determines the encoding code rate based on the first ratio or the corresponding first ratio after rounding the number of first subcarriers; encodes the data bits according to the encoding code rate to obtain the encoded codeword ; Modulate the coded codeword according to the modulation order corresponding to the MCS index to obtain the modulation symbol; subject the modulation symbol to discrete Fourier transform processing to obtain the frequency domain signal; perform cyclic expansion or subcarrier reservation on the frequency domain signal Process and obtain the first signal.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the coding rate is determined based on the first ratio or the corresponding first ratio after rounding off the number of first subcarriers. Then frequency domain extension or reserved subcarrier technology will affect the coding modulation process.
  • this application provides a communication device.
  • the communication device may be a network device, a device in a network device, or a device that can be used in conjunction with a network device.
  • the communication device may include performing one-to-one correspondence with the methods/operations/steps/actions described in any one of the first to third aspects, and any possible implementation manner of the first to third aspects.
  • the module can be a hardware circuit, a software, or a hardware circuit combined with software.
  • the communication device may include a processing unit and a communication unit.
  • the communication device can also achieve the effects that can be achieved in the first to third aspects.
  • the present application provides a communication device.
  • the communication device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device.
  • the communication device may include performing the method/operation described in any one of the first aspect, the second aspect, and the fourth aspect, and any possible implementation manner of the first aspect, the second aspect, and the fourth aspect.
  • the module corresponding to the steps/actions one-to-one.
  • the module can be a hardware circuit, a software, or a hardware circuit combined with software.
  • the communication device may include a processing unit and a communication unit.
  • the communication device can also achieve the effects that can be achieved in the first aspect, the second aspect and the fourth aspect.
  • the present application provides a communication device.
  • the communication device is composed of an input-output interface and a logic circuit.
  • the input-output interface is used to input or output data;
  • the logic circuit is as follows from the first aspect to the third aspect, Process the data with the method in any possible implementation of the first aspect to the third aspect, and obtain the processed data.
  • the present application provides a communication device.
  • the communication device is composed of an input-output interface and a logic circuit.
  • the input-output interface is used to input or output data; the logic circuit is as described in the first aspect, the second aspect and
  • the method in any possible implementation of the fourth aspect processes data and obtains processed data.
  • the present application provides a network device, including: a processor, the processor is coupled to a memory, and the memory is used to store instructions.
  • the network device implements the above-mentioned first aspect to the third aspect.
  • the present application provides a terminal device, including: a processor, the processor is coupled to a memory, and the memory is used to store instructions.
  • the terminal device implements the above-mentioned first aspect and the third aspect.
  • the present application provides a communication system, which includes a sending end and a receiving end.
  • the sending end is used to implement the functions of the method in the above-mentioned first aspect and fourth aspect, as well as any possible implementation manner of the first aspect and the fourth aspect.
  • the receiving end is configured to implement the functions of the method in the above second aspect and third aspect, as well as any possible implementation manner of the second aspect and third aspect.
  • the communication system may include the communication device as described in the fifth and sixth aspects, or may include the communication device as described in the seventh and eighth aspects, or may include the communication device as described in the ninth and tenth aspects. The device described in the aspect.
  • this application also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when the instructions are run on a computer, the computer executes the first to fourth aspects, and the method in any possible implementation manner of the first to fourth aspects.
  • the present application provides a chip system.
  • the chip system includes a processor and may also include a memory, for implementing the above first to fourth aspects, and any possibility of the first to fourth aspects. function in the method of the implementation.
  • the chip system can be composed of chips or include chips and other discrete devices.
  • this application also provides a computer program product, including instructions, which when the instructions are run on a computer, cause the computer to execute any one of the first aspect to the fourth aspect, and the first aspect to the fourth aspect. possible implementation methods.
  • FIG. 1 is a schematic diagram of the communication system provided by this application.
  • Figure 2 is a schematic diagram of frequency domain expansion
  • Figure 3 is a schematic diagram of a frequency domain spectrum shaping
  • Figure 4 is a schematic diagram of the impact of frequency domain extension and FDSS on the PAPR performance of the signal
  • Figure 5 is a schematic diagram of the impact of frequency domain extension and FDSS on the BLER performance of the signal under a time domain filter estimation
  • Figure 6 is a schematic flow chart of the first communication method provided by this application.
  • Figure 7 is a schematic flow chart of the second communication method provided by this application.
  • Figure 8 is a schematic flow chart of the third communication method provided by this application.
  • Figure 9 is a schematic flow chart of the fourth communication method provided by this application.
  • Figure 10 is a schematic diagram of a communication device provided by this application.
  • Figure 11 is a schematic diagram of a communication device provided by this application.
  • A/B can mean A or B;
  • and/or can be used to describe the existence of three relationships between related objects.
  • a and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural.
  • words such as “first” and “second” may be used to distinguish technical features with the same or similar functions. The words “first” and “second” are not logarithmic. The quantity and execution order are limited, and the words “first”, “second” and so on are not necessarily different.
  • this application provides a communication method.
  • the number of frequency domain extension subcarriers or the number of reserved subcarriers can be adjusted according to the coding and modulation scheme, making the PAPR performance of the transmitted waveform higher while ensuring the BLER performance of the system.
  • FIG. 1 is a schematic diagram of a communication system provided by this application.
  • the communication system includes a terminal device and a network device.
  • the network device can provide communication services to the terminal device.
  • the communication systems mentioned in this application include but are not limited to: narrowband-Internet of things (NB-IoT), global system for mobile communications (GSM), enhanced data rate GSM evolution system (enhanced data rate for GSM evolution, EDGE), wideband code division multiple access system (wideband code division multiple access, WCDMA), code division multiple access 2000 system (code division multiple access, CDMA2000), time division synchronous code division multiple access system (
  • NB-IoT narrowband-Internet of things
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • GSM global system for mobile communications
  • EDGE enhanced data rate GSM evolution system
  • WCDMA wideband code division multiple access
  • the network device may be a device that can communicate with the terminal device.
  • Network devices can be base stations, relay stations, or access points.
  • the base station can be a base transceiver station (BTS) in the global system for mobile communication (GSM) system or code division multiple access (CDMA) network, or it can be a broadband code
  • the 3G base station NodeB in the wideband code division multiple access (WCDMA) system can also be the evolutionary NodeB (referred to as eNB or eNodeB) in the long term evolution (long term evolution, LTE) system.
  • the network device may also be a satellite in a satellite communications system.
  • the network device can also be a wireless controller in a cloud radio access network (CRAN) scenario.
  • CRAN cloud radio access network
  • the network device may also be a network device in a 5G network or a network device in a future evolved public land mobile network (public land mobile network, PLMN) network (such as gNodeB).
  • Network devices can also be wearable devices, drones, or devices in the Internet of Vehicles (such as vehicle to everything (V2X)), or communication devices in device-to-device (D2D) communication. Or network equipment used in future communication systems.
  • V2X vehicle to everything
  • D2D device-to-device
  • the terminal device can be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a terminal, a wireless communication device, a terminal agent or a terminal.
  • UE user equipment
  • an access terminal a terminal unit
  • a terminal station a mobile station
  • a mobile station a mobile station
  • a remote station a remote terminal
  • a mobile device a terminal
  • a wireless communication device a terminal agent or a terminal.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a device with wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, wearable devices, drones, V2X devices, D2D devices, terminal devices in 5G networks, terminal devices in future evolved PLMN networks or in the future Terminal equipment in communication systems, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PAPR Peak-to-average power ratio
  • PAPR is defined as the ratio of the peak power to the average power of the signal. Since the dynamic range of the power amplifier is limited, too high PAPR will cause the power amplification to enter the nonlinear region, causing nonlinear distortion of the signal, causing spectrum expansion and in-band signal distortion, and reducing system performance. In order to prevent the signal from entering the nonlinear region, power backoff operation needs to be performed. Among them, the higher the PAPR, the higher the power required to be rolled back. However, power rollback will lead to a decrease in coverage performance, so reducing PAPR is conducive to improving coverage performance. Among them, the PAPR of the DFT-S-OFDM signal can be reduced through spectrum extension (spectral extension) and frequency-domain spectrum shaping (FDSS).
  • FDSS frequency-domain spectrum shaping
  • Discrete Fourier transform spread orthogonal frequency division multiplexing (discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM) signal:
  • DFT-S-OFDM waveform In order to improve uplink coverage in new radio (NR) technology, the DFT-S-OFDM waveform is supported. Compared with orthogonal frequency division multiplexing (OFDM) waveforms, DFT-S-OFDM waveforms can effectively reduce signal Peak to average power ratio (PAPR), thereby improving coverage.
  • a process for generating a DFT-S-OFDM signal may include coding, modulation, discrete Fourier transform (DFT), subcarrier mapping, and inverse fast Fourier transformation (IFFT), plus Steps such as cyclic prefix (CP) and digital-to-analog conversion.
  • LDPC low density parity check
  • QPSK quadrature phase shift keying
  • Step 3 Pass M modulation symbols through M-point DFT to obtain the frequency domain signal as ⁇ X(0),X(1),...,X(M-1) ⁇ .
  • Step 4 Map the frequency domain signal to M subcarriers, and perform N-point IFFT to obtain the time domain signal as ⁇ x(0),x(1),...,x(N-1) ⁇ .
  • the value of N is determined by the system bandwidth, and N is greater than M.
  • the frequency domain signal can also be multiplied by the precoding matrix before subcarrier mapping.
  • Step 5 Add a cyclic prefix to the time domain signal and perform digital-to-analog conversion to obtain an analog signal, and send the analog signal through the antenna.
  • Spectrum expansion also known as frequency domain expansion, refers to the cyclic expansion of frequency domain signals.
  • the frequency domain signal occupies M subcarriers, and the frequency domain signal is ⁇ X(0),X(1),...,X(M-1) ⁇ .
  • the frequency domain expanded signal of E elements ⁇ X(M-P),X(M-P+1),...,X(M-1),X(0),X(1),..., X(M-1),X(0),X(1),...,X(E-P-1) ⁇ .
  • the frequency domain extended signal is mapped onto the M+E subcarriers and sent. That is, the signal after frequency domain expansion will occupy more subcarriers.
  • the definition of frequency domain expansion ratio is introduced.
  • ⁇ 1 and ⁇ 2 both represent the frequency domain expansion ratio
  • M represents the number of subcarriers before frequency domain expansion
  • Q represents the number of subcarriers after frequency domain expansion
  • QM represents the number of frequency domain expansion subcarriers.
  • Both formulas (1) and (2) can describe the proportion of the number of frequency domain extended subcarriers, and according to formulas (1) and (2), it can be deduced: the larger ⁇ 1 is, the greater the number of frequency domain extended subcarriers; The larger ⁇ 2 is, the smaller the number of frequency domain extension subcarriers is.
  • the signal before frequency domain expansion is expressed as ⁇ X(0),X(1),X(2),X(3),X(4),X(5),X(6),X(7) ⁇
  • the signal after frequency domain expansion processing is expressed as ⁇ X(6),X(7),X(0),X(1),X(2),X(3),X(4),X( 5),X(6),X(7),X(0),X(1) ⁇ .
  • the frequency domain expanded signal is mapped to 12 subcarriers and transmitted.
  • ⁇ 1 and ⁇ 2 both represent the frequency domain expansion ratio
  • M represents the number of subcarriers before frequency domain expansion
  • Q represents the number of subcarriers after frequency domain expansion
  • QM represents the number of frequency domain expansion subcarriers.
  • Both formulas (3) and (4) can describe the proportion of the number of frequency domain extended subcarriers, and according to formulas (3) and (4), it can be deduced: the larger ⁇ 1 is, the greater the number of frequency domain extended subcarriers; The larger ⁇ 2 is, the smaller the number of frequency domain extension subcarriers is.
  • ⁇ 1 and ⁇ 2 are used as examples for description, but are not limiting.
  • FDSS refers to windowing filtering of frequency domain signals
  • windowing filtering refers to multiplying frequency domain signals and filter coefficients bit by bit.
  • Figure 3 is a schematic diagram of frequency domain spectrum shaping.
  • the frequency domain signal occupies M subcarriers.
  • the frequency domain signal is ⁇ X(0),X(1),...,X(M-1) ⁇
  • the filter coefficient is ⁇ W(0),W(1),...,W(M-1) ⁇
  • the frequency domain signal after window filtering is ⁇ X(0)W(0),X(1)W (1),...,X(M-1)W(M-1) ⁇ .
  • frequency domain extension and FDSS can be used alone or at the same time.
  • the frequency domain signal is usually cyclically expanded first, and then multiplied by the filter coefficient bit by bit. For example, assuming that the frequency domain signal is ⁇ X(0), M-P),X(M-P+1),...,X(M-1),X(0),X(1),...,X(M-1),X(0),X (1),...,X(E-P-1) ⁇ ; then expand the frequency domain signal and filter coefficient ⁇ W(0),W(1),...,W(M+E) ⁇ Multiply bit by bit to obtain the frequency domain signal after frequency domain expansion and windowing filtering, and then map it to the M+E subcarrier and send it.
  • Figure 4 is a schematic diagram of the impact of frequency domain extension and FDSS on the PAPR performance of the signal.
  • Figure 4 shows the PAPR performance comparison of DFT-S-OFDM waveforms using FDSS and/or frequency domain extension and DFT-S-OFDM waveforms without FDSS and frequency domain extension under QPSK modulation.
  • the abscissa is the PAPR performance
  • the ordinate is the complementary cumulative distribution function (CCDF) value. It can be seen from the comparison in Figure 4 that FDSS and frequency domain extension can reduce the PAPR of the signal.
  • CCDF complementary cumulative distribution function
  • FIG. 5 is a schematic diagram of the impact of frequency domain extension and FDSS on the BLER performance of the signal under a time domain filter estimation.
  • Figure 5 shows the BLER performance comparison of the DFT-S-OFDM waveform using FDSS and frequency domain extension under QPSK modulation and the DFT-S-OFDM waveform without using FDSS and frequency domain extension when the channel estimation algorithm is time domain filter estimation. .
  • the spectral efficiency increases, the BLER performance loss of the DFT-S-OFDM waveform using FDSS and frequency domain extension under QPSK modulation is gradually increasing compared with the DFT-S-OFDM waveform without FDSS and frequency domain extension. The loss of BLER performance will reduce the throughput during uplink transmission.
  • Table 1 is a relationship between coding performance loss, code rate, and modulation order, including the code rate before frequency domain expansion, the code rate after frequency domain expansion (for example, the frequency domain expansion ratio is 0.25), and the code rate under QPSK modulation.
  • BLER performance difference BLER performance difference under 16QAM modulation.
  • Table 1 shows that the fixed frequency domain extension ratio is 0.25 (which can also be described as a fixed frequency domain extension ratio of 25%). Under the same total transmit power and the same spectrum efficiency, compare the Gaussian channel after the code rate is increased.
  • the BLER performance difference between the DFT-S-OFDM waveform and the DFT-S-OFDM waveform before the code rate is increased.
  • the initial code rate is R
  • the signal power on each sub-carrier is P
  • the code rate after the code rate is increased is R *(1+ ⁇ 1 )
  • the signal power on each subcarrier is P*(1+ ⁇ 1 ).
  • Table 1 Relationship between coding performance loss, code rate, and modulation order
  • PAPR can also be reduced through reserved subcarrier technology.
  • the reserved subcarrier technology refers to selecting reserved subcarriers (also called peak reduction tones (PRT) subcarriers) in the frequency domain in advance, and placing the frequency domain clipping signal C through the reserved subcarriers.
  • PRT peak reduction tones
  • the frequency domain clipping signal C undergoes inverse discrete Fourier transformation (IDFT) to generate an inverse waveform in the time domain that eliminates the peak value of the original time domain waveform.
  • IDFT inverse discrete Fourier transformation
  • the data signal X and the frequency domain clipping signal C occupy different frequency domain resources, that is, the data signal
  • the value of X is 0 on the reserved subcarrier (that is, The upper value is not 0 (that is, C k ⁇ 0,k ⁇ i 0 ,i 1 ,...,i L-1 ⁇ ).
  • the frequency domain clipping signal generates the time domain clipping signal, Q represents the IDFT matrix.
  • the gradient descent method is used to iteratively generate the time domain clipping signal c.
  • the existing gradient descent method can be used for iteration. The iteration process is not limited in this application.
  • the equipment in this application can be divided into a sending end and a receiving end for encoding and modulating data.
  • the sending end can be a network device or a terminal device
  • the receiving end can be a terminal device or a network device.
  • it can be divided into uplink transmission scenarios (the sender is a terminal device and the receiver is a network device) and downlink transmission scenarios (the sender is a network device and the receiver is a terminal device).
  • uplink transmission scenarios the sender is a terminal device and the receiver is a network device
  • downlink transmission scenarios the sender is a network device and the receiver is a terminal device.
  • Figure 6 is a schematic flow chart of the first communication method provided by this application, including the following steps:
  • the first coding modulation parameter is used for coding modulation processing, and refers to a type of parameters related to coding modulation processing.
  • the first coding modulation parameter may be a modulation and coding scheme (MCS) index, a coding rate, or a modulation order.
  • MCS modulation and coding scheme
  • Table 2 shows a mapping relationship between MCS index and coding rate, modulation order and spectral efficiency.
  • Table 2 Mapping relationship between MCS index and coding rate, modulation order and spectral efficiency
  • the first coding modulation parameter is determined by the network device.
  • the network device may determine the MCS index based on channel quality.
  • the network device determines the MCS index, it can also determine the corresponding coding rate and modulation order.
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier. That is, when the network equipment adopts the frequency domain extension technology, the first subcarrier is the frequency domain extension subcarrier; when the network equipment adopts the reserved subcarrier technology, the first subcarrier is the reserved subcarrier.
  • the value of the number N of the first subcarriers is related to the value of the first coding modulation parameter. For example, as the value of the first coding modulation parameter gradually increases, the number N of first subcarriers gradually decreases.
  • this application introduces a first ratio.
  • the first ratio is the ratio of the number of frequency domain extension subcarriers to the number of subcarriers before frequency domain extension; when the network equipment adopts reserved subcarrier technology, the first ratio is the ratio of the number of reserved subcarriers.
  • ⁇ 1 represents the frequency domain expansion ratio
  • M represents the number of subcarriers before frequency domain expansion
  • Q represents the number of subcarriers after frequency domain expansion.
  • the number of subcarriers, then QM represents the number of frequency domain extension subcarriers;
  • ⁇ 1 represents the subcarrier reservation ratio
  • M represents the number of subcarriers before reservation
  • Q represents the number of subcarriers after reservation.
  • the number of subcarriers, QM represents the number of reserved subcarriers.
  • the value of the first ratio is related to the value of the first coding modulation parameter, including the following situations:
  • Case 1 The first coding modulation parameter belongs to the first coding modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2 .
  • the first ratio ⁇ 1 represents the frequency domain extension ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually increases, so the first ratio needs to be reduced. Then, when there are at least two different coded modulation parameters ⁇ 1 and ⁇ 2 in the first coded modulation parameter set, and ⁇ 1 is greater than ⁇ 2 , the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2 .
  • a ratio can be a fixed value.
  • Case 2 The first coding modulation parameter belongs to the first coding modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio ⁇ 1 represents the frequency domain extension ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually increases, so the first ratio needs to be reduced.
  • case two limits any two different coded modulation parameters ⁇ 1 and ⁇ 2 in the first coded modulation parameter set, It is satisfied that ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 .
  • the first ratio corresponding to ⁇ 3 is smaller than the first ratio corresponding to ⁇ 4 .
  • ⁇ 3 or ⁇ 4 have different values and belong to the same value range, then ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is equal to the first ratio corresponding to ⁇ 4 .
  • the following describes an example of the relationship between the first coding modulation parameter and the first ratio when the first coding modulation parameter is an MCS index, a coding rate, or a modulation order in cases one and two.
  • the first ratio ⁇ 1 represents the frequency domain expansion ratio or the subcarrier reservation ratio, and is defined as
  • the first ratio ⁇ 1 represents the frequency domain expansion ratio or the subcarrier reservation ratio, and is defined as
  • Table 4 Mapping relationship between the first ratio and coding rate
  • the examples in 1) to 3) above are only examples, and this application is not limiting.
  • the definition of the first ratio can also be expressed as That is to say, the value of the first ratio can also be in the form of a percentage, which is not limited by this application.
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ 1 corresponding to the value x of the first coded modulation parameter is the first value.
  • the first value is 0 or a value close to 0.
  • the first ratio ⁇ 1 represents the frequency domain extension ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually increases, so the first ratio needs to be reduced. What is different from case one or case two is that although the function mapping relationship is used in case three to describe the relationship between the first coded modulation parameter and the first ratio, the described changing trend of the relationship between the first coded modulation parameter and the first ratio is similar.
  • the following describes an example of the relationship between the first coding modulation parameter and the first ratio when the first coding modulation parameter is an MCS index or a coding rate in case three.
  • the mapping function between the MCS index I MCS and the first ratio ⁇ 1 can be derived as shown in formula (6):
  • the mapping function between the coding rate R and the first ratio ⁇ 1 can be derived as shown in formula (7):
  • this application also provides another relationship between the first encoding modulation parameter and the second ratio ⁇ 2
  • the second ratio is as shown in formula (2), and the second ratio ⁇ 2 can also represent the frequency domain extension ratio or the subcarrier reservation ratio, and is defined as
  • ⁇ 2 represents the frequency domain expansion ratio
  • M represents the number of subcarriers before frequency domain expansion
  • Q represents the number of subcarriers after frequency domain expansion
  • QM represents the number of frequency domain expansion subcarriers
  • ⁇ 2 represents the subcarrier reservation ratio
  • M represents the number of subcarriers before reservation
  • Q represents the number of subcarriers after reservation
  • QM represents the number of reserved subcarriers.
  • the value of the second ratio is related to the value of the first coding modulation parameter, including the following situations:
  • Case 4 The first coding modulation parameter belongs to the first coding modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the second ratio corresponding to ⁇ 1 is greater than the second ratio corresponding to ⁇ 2 .
  • the second ratio ⁇ 2 represents the frequency domain expansion ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually decreases, so the second ratio can be increased. Then, when there are at least two different coded modulation parameters ⁇ 1 and ⁇ 2 in the first coded modulation parameter set, and ⁇ 1 is greater than ⁇ 2 , the second ratio corresponding to ⁇ 1 is greater than the second ratio corresponding to ⁇ 2 .
  • the second ratio corresponding to ⁇ 1 is greater than the second ratio corresponding to ⁇ 2
  • the other coding modulation parameters correspond to the second ratio.
  • the second ratio can be a fixed value.
  • Case 5 The first coding modulation parameter belongs to the first coding modulation parameter set
  • ⁇ 3 is greater than ⁇ 4
  • the second ratio corresponding to ⁇ 3 is less than or equal to the second ratio corresponding to ⁇ 4
  • the second ratio ⁇ 2 represents the frequency domain expansion ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually decreases, so the second ratio can be increased.
  • case two limits any two different coded modulation parameters ⁇ 1 and ⁇ 2 in the first coded modulation parameter set to satisfy that ⁇ 3 is greater than ⁇ 4 , and the second ratio corresponding to ⁇ 3 is greater than or equal to ⁇ 4 corresponds to the second ratio.
  • the second ratio corresponding to ⁇ 3 is greater than the second ratio corresponding to ⁇ 4 .
  • ⁇ 3 or ⁇ 4 have different values and belong to the same value range, then ⁇ 3 is greater than ⁇ 4 , and the second ratio corresponding to ⁇ 3 is equal to the second ratio corresponding to ⁇ 4 .
  • the following describes an example of the relationship between the first coding modulation parameter and the second ratio when the first coding modulation parameter is an MCS index, a coding rate, or a modulation order in cases four and five.
  • Table 7 Mapping relationship between the second ratio and coding rate
  • the examples in 1) to 3) above are only examples, and this application is not limiting.
  • the definition of the second ratio can also be expressed as That is to say, the value of the second ratio can also be in the form of a percentage, which is not limited by this application.
  • ⁇ 3 is a positive real number
  • ⁇ 4 is a positive real number
  • the second ratio ⁇ 2 corresponding to the value x of the first coded modulation parameter is the second value.
  • the second value is 1 or a value close to 1.
  • the second ratio ⁇ 2 represents the frequency domain expansion ratio or the subcarrier reservation ratio, and is defined as When, as the MCS index/coding rate/modulation order increases, the loss of PAPR performance caused by frequency domain expansion or reserved subcarriers gradually decreases, so the second ratio can be increased. What is different from case four or case five is that although the function mapping relationship is used in case six to describe the relationship between the first coded modulation parameter and the second ratio, the changing trend of the described relationship between the first coded modulation parameter and the second ratio is similar.
  • the following describes an example of the relationship between the first coding modulation parameter and the second ratio when the first coding modulation parameter is an MCS index or a coding rate in case 6.
  • the number of first subcarriers determined according to the first coding modulation parameter may be an integer or may not be an integer.
  • the number of first subcarriers is an integer.
  • the number N of first subcarriers needs to be rounded to obtain the first rounded number.
  • the number of subcarriers N′ is an integer multiple of a positive integer a, and the positive integer a is 1 or 12.
  • An integer multiple of the number of subcarriers included in (usually 12).
  • the second subcarrier when N is not 0, includes a frequency domain extension subcarrier and a subcarrier before frequency domain extension, or the second subcarrier includes a reserved subcarrier and a pre-reservation subcarrier. That is, when frequency domain extension technology or reserved subcarrier technology is used, the number of second subcarriers is equal to the sum of the number of frequency domain extension subcarriers and the number of subcarriers before frequency domain extension, or, the second subcarrier The number is equal to the sum of the number of reserved subcarriers and the number of subcarriers before reservation.
  • the number of second subcarriers is equal to the number of frequency domain extension subcarriers after rounding and the number of subcarriers before frequency domain extension.
  • the sum of the number of carriers, or the number of second subcarriers is equal to the sum of the rounded number of reserved subcarriers and the number of pre-reserved subcarriers.
  • N when N equals 0, it means that frequency domain extension or subcarrier reservation processing is not performed, and the second subcarrier is the number of subcarriers required for the frequency domain signal.
  • encoding and modulating the data bits to generate the first signal includes the following steps:
  • s11 Determine the coding code rate according to the first ratio corresponding to the first coding modulation parameter or the first ratio corresponding to the rounding process of the number of first subcarriers.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation. That is to say, the first ratio used to determine the coding rate may be the first ratio ⁇ 1 as described in cases one to six above, or it may be the corresponding first ratio after rounding the number of first subcarriers.
  • the first ratio used to determine the coding rate can also be the second ratio ⁇ 2 as described in cases one to six above, or the corresponding second ratio after rounding the number of first subcarriers.
  • s13 Modulate the encoded codeword according to the modulation order corresponding to the MCS index to obtain a modulation symbol.
  • the modulation symbol is processed by discrete Fourier transform to obtain the frequency domain signal.
  • s15 perform cyclic expansion or subcarrier reservation processing on the frequency domain signal to obtain the first signal.
  • the specific execution process of the above steps s11-s15 includes:
  • Q m *M code words are obtained as ⁇ b(0),b(1),...,b( Q m *M-1) ⁇
  • the Q m *M code words ⁇ b(0), b(1),..., b(Q m *M-1) ⁇ are modulated with the order Q m Modulation processing, obtain M modulation symbols ⁇ s(0),s(1),...,s(M-1) ⁇ , pass the M modulation symbols through M-point DFT, and obtain the frequency domain signal as ⁇ X (0),X(1),...,X(M-1) ⁇ .
  • the number of first subcarriers N ⁇ 1 *M.
  • P elements are expanded to the left (or called forward) and NP is expanded to the right (or called backward).
  • the frequency domain extended signal is mapped onto M+N subcarriers and sent.
  • the frequency domain clipping signal on the reserved subcarrier is ⁇ C(0),C(1),...,C(N-1) ⁇
  • the frequency domain signal is ⁇ C(0),C( 1),...,C(P-1),X(0),X(1),...,X(M-1),C(P),C(P+1),... ,C(N-1) ⁇ .
  • the frequency domain signal can also be multiplied by the precoding matrix before subcarrier mapping.
  • CP cyclic prefix
  • the encoding code rate may also remain unchanged, that is, the encoding code rate may be the code rate R determined according to Table 2.
  • the subsequent execution processes are similar and will not be repeated here.
  • windowing filtering processing can also be performed on the frequency domain signal.
  • windowing filtering processing can also be performed on the frequency domain signal.
  • the method is not limited in this application.
  • the description of the frequency domain expansion ratio in this section takes ⁇ 1 and ⁇ 2 as an example, but this application is not limited.
  • the frequency domain extension ratio can also be ⁇ 1 and ⁇ 2 , ⁇ 1 and ⁇ 2 also satisfies the mapping relationship shown in Table 3 to Table 8, or as shown in Formula (7) to Formula (10)
  • the functional relationship in please refer to the corresponding description for the specific implementation, and will not be described again here.
  • the communication method performed by the terminal device is:
  • FIG. 7 is a schematic flow chart of the second communication method provided by this application, including the following steps:
  • the terminal device may also determine the number N of first subcarriers according to the first coding modulation parameter.
  • the specific determination method includes, for example, a description of the first subcarrier, a description of the first coding modulation parameter, a description of how to determine the number N of first subcarriers based on the first coding modulation parameter, a description of the first ratio, the second
  • the first coding modulation parameter may be determined by the network device and sent to the terminal device.
  • the network device may determine the MCS index based on the channel quality and send the MCS index to the terminal device.
  • the terminal device when the terminal device determines the MCS index, it can also determine the corresponding coding rate and modulation order.
  • the terminal device may retransmit. For example, when the terminal device makes a decoding error or fails to transmit coded and modulated data, the terminal device needs to retransmit.
  • the MCS index will change during retransmission, causing the first coding modulation parameter to change.
  • the first coding modulation parameter is determined based on the downlink control information (DCI) used to schedule the current transmission.
  • DCI downlink control information
  • the first signal after receiving the first signal, the first signal can be demodulated and decoded, including the following steps:
  • s21 perform decyclic expansion or subcarrier reservation processing on the first signal to obtain a frequency domain signal.
  • s24 determine the coding code rate according to the first ratio corresponding to the first coding modulation parameter or the corresponding first ratio after rounding the number of first subcarriers;
  • the above-mentioned steps s21-s25 are the reverse process of steps s11-s15 described in section 1.
  • the signal after the frequency domain expansion of the elements ⁇ X(MP),X(M-P+1),...,X(M-1),X(0),X(1),...,X( M-1), ,X(M-1) ⁇ .
  • the frequency domain signal ⁇ X(0), ),...,s(M-1) ⁇ .
  • Demodulate M modulation symbols according to the modulation order Q m and obtain Q m *M encoded codewords ⁇ b(0), b(1),..., b(Q m *M-1) ⁇ .
  • Q m *M code words ⁇ b(0) ,b(1),...,b(Q m *M-1) ⁇ is decoded to obtain Q m *R′*M data bits ⁇ a(0),a(1),...,a (Q m *R′*M-1) ⁇ .
  • the methods described in subsections 1 and 2 above can also be implemented if the execution subject is replaced.
  • the terminal device can perform the first communication method as described in Section 1, and the network device can perform the second communication method as described in Section 2. a communication method.
  • FIG. 8 is a schematic flow chart of the third communication method provided by this application, including the following steps:
  • the network device determines the number N of first subcarriers based on the first coding modulation parameter.
  • the network device sends indication information to the terminal device, where the indication information includes the number N of first subcarriers or the first ratio.
  • the relevant description of the first subcarrier the relevant description of the first coding modulation parameter, the description of how to determine the number N of first subcarriers according to the first coding modulation parameter, the correlation of the first ratio, the second ratio, etc.
  • the relevant description of the first subcarrier the relevant description of the first coding modulation parameter
  • the description of how to determine the number N of first subcarriers according to the first coding modulation parameter the correlation of the first ratio, the second ratio, etc.
  • the first coded modulation coefficient also includes spectral efficiency (spectral efficiency is usually determined by the base station and is not involved in the terminal equipment).
  • spectral efficiency is usually determined by the base station and is not involved in the terminal equipment.
  • the first coding modulation parameter is spectral efficiency
  • the relationship between spectral efficiency and the first ratio ⁇ 1 also satisfies the situations one to three described in Section 1 and related examples, or, the relationship between the spectral efficiency and the second ratio ⁇
  • the relationship between 2 also satisfies the situations 4 to 6 described in Section 1 and related examples, which will not be repeated here.
  • the network device determines the number N of first subcarriers, it can indicate the number N of first subcarriers or the first ratio to the terminal device through an indication message. Then the terminal device can directly receive the indication information, and generate and send the first signal according to the indication information (that is, the terminal device does not need to determine the number N of the first subcarriers or the first ratio by itself).
  • the indication information can be obtained by adding a quantization bit field in the DCI. Different values of the information bits in the quantization bit field are used to indicate the number N of different first subcarriers or the number N of the first subcarrier.
  • a ratio ⁇ 1 is a mapping relationship between the first ratio and the quantization bit field provided by this application.
  • Table 9 Mapping relationship between the first ratio value and the quantization bit field
  • the quantization bit field can also indicate different first ratios through more bit values, which is not limited in this application.
  • S303 The network device receives the first signal on the second subcarrier.
  • the network device is a receiving end and can receive the first signal on the second subcarrier.
  • the second subcarrier please refer to the corresponding description in Section 1, which will not be described again here.
  • the network device may perform demodulation and decoding processing on the first signal.
  • demodulation and decoding processing For specific implementation methods, please refer to the description of demodulation and decoding processing on the first signal in Section 2, which will not be described again here.
  • FIG. 9 is a schematic flow chart of the fourth communication method provided by this application, including the following steps:
  • the terminal device receives indication information from the network device, where the indication information includes the number N of first subcarriers or the first ratio.
  • the related description of the first subcarrier, the related description of the first ratio, the second ratio, etc. can refer to the corresponding description in Section 1, and the description of the indication information can refer to the corresponding description in Section 3. No further details will be given here.
  • the terminal device sends the first signal to the network device on the second subcarrier.
  • the terminal device before sending the first signal, performs coding, modulation and other processing on the data bits to generate the first signal.
  • the terminal device before sending the first signal, performs coding, modulation and other processing on the data bits to generate the first signal.
  • coding, modulation and other processing on the data bits to generate the first signal.
  • the device or equipment provided by this application may include a hardware structure and/or a software module to realize the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is performed as a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • the division of modules in this application is schematic and is only a logical function division. In actual implementation, there may be other division methods.
  • each functional module in various embodiments of the present application can be integrated into a processor, or can exist physically alone, or two or more modules can be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software function modules.
  • FIG 10 is a schematic diagram of a communication device provided by this application.
  • the communication device may include modules that perform one-to-one correspondence with the methods/operations/steps/actions described in the method embodiments corresponding to Figures 6 to 9.
  • the modules may be hardware circuits, software, or Hardware circuit combined with software implementation.
  • the communication device 1000 includes a communication unit 1001 and a processing unit 1002. It is used to implement the method executed by the terminal device or the network device in the previous embodiment.
  • the processing unit 1002 is configured to determine the number of first subcarriers according to the first coding modulation parameter.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter.
  • the communication unit 1001 is configured to send the first signal on the second subcarrier. Among them, when the first When the number of subcarriers is not 0, the second subcarrier includes frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarrier includes the reserved subcarriers and subcarriers before reservation.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coding modulation parameter is determined based on downlink control information DCI used to schedule current transmission.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the processing unit 1002 is configured to round the number N of the first subcarriers to obtain the rounded number N′ of the first subcarriers, where N′ is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the processing unit 1002 is configured to perform encoding and modulation processing on the data bits.
  • the process includes the following: determining the coding rate according to the first ratio corresponding to the first coding modulation parameter or the first ratio after rounding the number of first subcarriers; encoding the data bits according to the coding rate to obtain the coding codeword; modulate the coded codeword according to the modulation order corresponding to the MCS index to obtain modulation symbols; subject the modulation symbols to discrete Fourier transform processing to obtain frequency domain signals; perform cyclic expansion or subcarriers on the frequency domain signals Set aside processing to obtain the first signal.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the communication method implemented by the communication device is designed such that the number of first subcarriers can change with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining greater PAPR performance gain, that is, Yes, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the processing unit 1002 is configured to determine the number of first subcarriers according to the first coding modulation parameter.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter.
  • the communication unit 1001 is configured to receive the first signal on the second subcarrier.
  • the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the processing unit 1002 is configured to round the number N of the first subcarriers to obtain the rounded number N′ of the first subcarriers, where N′ is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the processing unit 1002 is configured to perform demodulation and decoding processing on the first signal after receiving the first signal.
  • the process includes the following: performing decyclic expansion or subcarrier reservation processing on the first signal to obtain a frequency domain signal; subjecting the frequency domain signal to inverse discrete Fourier transform processing to obtain a modulation symbol; according to the modulation order corresponding to the MCS index.
  • the code rate decodes the encoded codeword to obtain data bits.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the number of first subcarriers may vary with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining greater PAPR performance gain, that is, Yes, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the processing unit 1002 is configured to determine the number of first subcarriers according to the first coded modulation coefficient.
  • the communication unit 1001 is configured to send indication information to the terminal device, where the indication information includes the number N of first subcarriers or the first ratio.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the coding modulation coefficient
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the communication unit 1001 is also configured to receive the first signal from the terminal device on the second subcarrier. Wherein, when the number of the first subcarriers is not 0, the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation. carrier.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order, or spectrum efficiency.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the processing unit 1002 is configured to round the number N of the first subcarriers to obtain the rounded number N′ of the first subcarriers, where N′ is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the indication information also includes a first ratio corresponding to the number of first subcarriers after rounding.
  • the first ratio corresponding to the number of first subcarriers after rounding is the number of frequency domain extension subcarriers after rounding.
  • the ratio to the number of subcarriers before frequency domain expansion; or, the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the processing unit 1002 is configured to perform demodulation and decoding processing on the received first signal.
  • the process includes the following: performing decyclic expansion or subcarrier reservation processing on the first signal to obtain a frequency domain signal; subjecting the frequency domain signal to inverse discrete Fourier transform processing to obtain a modulation symbol; according to the modulation order corresponding to the MCS index.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the communication method implemented by the communication device can be applied to an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the network device can directly indicate the frequency domain expansion ratio or subcarrier reservation ratio to the terminal device, which facilitates the terminal device to directly encode and modulate the data bits according to the frequency domain expansion ratio or subcarrier reservation ratio to obtain The first signal.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the communication unit 1001 is configured to receive indication information from the network device, where the indication information includes the number of first subcarriers or the first ratio.
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier.
  • the number of the first subcarrier is determined based on the first coded modulation coefficient.
  • the value of the number of the first subcarrier is the same as the value of the coded modulation coefficient.
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of subcarriers before reservation.
  • the communication unit 1001 is also configured to send the first signal to the network device on the second subcarrier.
  • the second subcarrier includes the frequency domain extension subcarrier and the subcarrier before frequency domain extension, or the second subcarrier includes the reserved subcarrier and the predetermined subcarrier. Keep the previous subcarrier.
  • the first coding modulation parameter is a modulation and coding scheme MCS index, or coding rate, or modulation order, or spectrum efficiency.
  • MCS index corresponds to a coding rate and a modulation order.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 1 is greater than ⁇ 2
  • the first ratio corresponding to ⁇ 1 is smaller than the first ratio corresponding to ⁇ 2
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • the first coded modulation parameter belongs to the first coded modulation parameter set
  • ⁇ 3 is greater than ⁇ 4 , and the first ratio corresponding to ⁇ 3 is less than or equal to the first ratio corresponding to ⁇ 4 ,
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers.
  • ⁇ 1 is a negative real number
  • ⁇ 2 is a positive real number
  • the first ratio ⁇ corresponding to the value x of the first coded modulation parameter is the first value.
  • the processing unit 1002 is configured to round the number N of the first subcarriers to obtain the rounded number N′ of the first subcarriers, where N′ is an integer multiple of the positive integer a.
  • the positive integer a is 1 or 12.
  • the indication information also includes a first ratio corresponding to the number of first subcarriers after rounding.
  • the first ratio corresponding to the number of first subcarriers after rounding is the number of frequency domain extension subcarriers after rounding.
  • the ratio to the number of subcarriers before frequency domain expansion; or, the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the processing unit 1002 is configured to round the corresponding first ratio after integer processing according to the first ratio or the number of first subcarriers to determine the encoding code rate; encode the data bits according to the encoding code rate to obtain the encoding codeword; Modulate the coded codeword according to the modulation order corresponding to the MCS index to obtain the modulation symbol; subject the modulation symbol to discrete Fourier transform processing to obtain the frequency domain signal; perform cyclic expansion or subcarrier reservation processing on the frequency domain signal , get the first signal.
  • the first ratio corresponding to the number of first subcarriers after rounding is the ratio of the number of frequency domain extension subcarriers after rounding to the number of subcarriers before frequency domain extension; or, the number of first subcarriers is rounded
  • the corresponding first ratio after processing is the ratio of the number of reserved subcarriers after rounding to the number of subcarriers before reservation.
  • the communication method implemented by the communication device can be applied to an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the terminal device directly receives the indication information to obtain the indicated frequency domain expansion ratio or subcarrier reservation ratio, so that the terminal device directly encodes and modulates the data bits according to the frequency domain expansion ratio or subcarrier reservation ratio.
  • the first signal is obtained through processing.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • FIG. 10 A device including a plurality of functional units shown in FIG. 10 will be described below.
  • the device described in this application includes multiple functional units shown in Figure 10.
  • Figure 11 is a schematic diagram of a communication device provided by this application, used to implement the communication method in the above method embodiment.
  • the communication device 1100 may also be a chip system. It can be understood that the communication device 1100 may be, for example, a terminal device or a network device.
  • the communication device 1100 includes a communication interface 1101 and a processor 1102.
  • the communication interface 1101 may be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of implementing transceiver functions.
  • the communication interface 1101 is used to communicate with other devices through a transmission medium, so that the device 1100 can communicate with other devices.
  • the processor 1102 is configured to perform processing-related operations.
  • the processor 1102 is configured to determine the number of first subcarriers according to the first coding modulation parameter.
  • the communication interface 1101 is used to send the first signal on the second subcarrier.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter; when When the number of first subcarriers is not 0, the second subcarrier includes the frequency domain extension subcarrier and the subcarrier before frequency domain extension, or the second subcarrier includes the reserved subcarrier and the pre-reservation subcarrier. subcarrier.
  • the number of first subcarriers in the communication method implemented by the communication device may vary with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining greater PAPR performance gain, that is, Yes, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the processor 1102 is configured to determine the number of first subcarriers according to the first coding modulation parameter.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the first coding modulation parameter.
  • the communication interface 1101 is used to receive the first signal on the second subcarrier.
  • the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation.
  • the number of first subcarriers in the communication method implemented by the communication device may vary with different first coding modulation parameters. For example, when the spectrum efficiency is small, the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for data transmission, thereby obtaining greater PAPR performance gain, that is, Yes, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the processor 1102 is configured to determine the number of first subcarriers according to the first coded modulation coefficient.
  • the communication interface 1101 is used to send indication information to the terminal device, where the indication information includes the number N of first subcarriers or the first ratio.
  • the first coding modulation parameter is used for coding modulation processing
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier
  • the value of the number of the first subcarrier is related to the value of the coding modulation coefficient
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion
  • the first ratio is the ratio of the number of reserved subcarriers to the number of pre-reserved subcarriers. ratio.
  • the communication interface 1101 is also used to receive the first signal from the terminal device on the second subcarrier. Wherein, when the number of the first subcarriers is not 0, the second subcarriers include frequency domain extension subcarriers and subcarriers before frequency domain extension, or the second subcarriers include reserved subcarriers and subcarriers before reservation. carrier.
  • the communication method implemented by the communication device can be applied to an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the network device can directly indicate the frequency domain expansion ratio or subcarrier reservation ratio to the terminal device, which facilitates the terminal device to directly encode and modulate the data bits according to the frequency domain expansion ratio or subcarrier reservation ratio to obtain The first signal.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the communication interface 1101 is configured to receive indication information from the network device, where the indication information includes the number of first subcarriers or the first ratio.
  • the first subcarrier is a frequency domain extension subcarrier or a reserved subcarrier.
  • the number of the first subcarrier is determined based on the first coded modulation coefficient.
  • the value of the number of the first subcarrier is the same as the value of the coded modulation coefficient.
  • the first ratio is the ratio of the number of frequency domain extended subcarriers to the number of subcarriers before frequency domain expansion, or the first ratio is the ratio of the number of reserved subcarriers to the number of subcarriers before reservation.
  • the communication interface 1101 is also used to send the first signal to the network device on the second subcarrier.
  • the second subcarrier includes the frequency domain extension subcarrier and the subcarrier before frequency domain extension, or the second subcarrier includes the reserved subcarrier and the predetermined subcarrier. Keep the previous subcarrier.
  • the communication method implemented by the communication device can be applied to an uplink data transmission scenario in which the network device sends instruction information to the terminal device, and the terminal device sends coded and modulated data to the network device according to the instruction information.
  • the terminal device directly receives the indication information to obtain the indicated frequency domain expansion ratio or subcarrier reservation ratio, so that the terminal device directly encodes and modulates the data bits according to the frequency domain expansion ratio or subcarrier reservation ratio.
  • the first signal is obtained through processing.
  • the coding performance loss caused by the code rate increase is small, and more frequency domain extension subcarriers or reserved subcarriers can be used for coding and modulation processing, thereby obtaining greater PAPR performance gain, and also That is, the PAPR performance of the transmitted waveform is optimized while ensuring the BLER performance of the system.
  • the communication device 1100 may also include at least one memory 1103 for storing program instructions and/or data.
  • the memory is coupled to the processor. Coupling in this application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules.
  • the processor may operate in conjunction with the memory.
  • the processor may execute program instructions stored in memory.
  • the at least one memory and processor are integrated together.
  • the bus 1104 is represented by a thick line in FIG. 11.
  • the connection methods between other components are only schematically illustrated and are not limiting.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 11, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component that can implement or execute the present application.
  • a general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in this application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or it may be a volatile memory (volatile memory), such as a random access memory.
  • Get memory random-access memory, RAM.
  • Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in this application can also be a circuit or any other device capable of realizing a storage function, used to store program instructions and/or data.
  • This application provides a communication system, which includes a terminal device and a network device in the embodiments corresponding to Figures 6 to 9.
  • This application provides a computer-readable storage medium.
  • the computer-readable storage medium stores programs or instructions.
  • the program or instruction is run on the computer, the computer is caused to perform the communication method in the embodiment corresponding to FIG. 6 to FIG. 9 .
  • the computer program product includes instructions.
  • the instructions When the instructions are run on the computer, the computer is caused to execute the communication method in the embodiment corresponding to Figures 6 to 9.
  • the present application provides a chip or chip system.
  • the chip or chip system includes at least one processor and an interface.
  • the interface and the at least one processor are interconnected through lines.
  • the at least one processor is used to run computer programs or instructions to execute the tasks shown in Figure 6 to Embodiment corresponding to Figure 9 communication methods.
  • the interface in the chip can be an input/output interface, a pin or a circuit, etc.
  • the above-mentioned chip system can be a system on chip (SOC), or a baseband chip, etc., where the baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, an interface module, etc.
  • SOC system on chip
  • baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, an interface module, etc.
  • the chip or chip system described above in this application further includes at least one memory, and instructions are stored in the at least one memory.
  • the memory can be a storage unit inside the chip, such as a register, a cache, etc., or it can be a storage unit of the chip (such as a read-only memory, a random access memory, etc.).
  • the technical solutions provided in this application can be implemented in whole or in part through software, hardware, firmware, or any combination thereof.
  • software When implemented using software, 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 this application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • 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 contains one or more available media integrated.
  • the available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, digital video disc (digital video disc, DVD)), or semiconductor media, etc.
  • the embodiments may refer to each other, for example, the methods and/or terms between the method embodiments may refer to each other, for example, the functions and/or terms between the device embodiments may refer to each other. References may be made to each other, for example functions and/or terms between apparatus embodiments and method embodiments may be referenced to each other.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

La présente demande concerne un procédé et un appareil de communication, et un dispositif. Dans le procédé, un premier paramètre de codage et de modulation peut être déterminé selon un schéma de codage et de modulation, et le nombre de sous-porteuses d'extension de domaine fréquentiel ou de sous-porteuses réservées peut être ajusté en fonction du premier paramètre de codage et de modulation, ce qui permet d'optimiser les performances de rapport de puissance crête à puissance moyenne (PAPR) d'une forme d'onde transmise tout en garantissant les performances de taux d'erreur de bloc (BLER) d'un système.
PCT/CN2023/116805 2022-09-05 2023-09-04 Procédé et appareil de communication, et dispositif WO2024051653A1 (fr)

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CN202211079976.3 2022-09-05
CN202211079976.3A CN117713989A (zh) 2022-09-05 2022-09-05 一种通信方法、装置及设备

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100118836A1 (en) * 2006-11-02 2010-05-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and Arrangement in a Telecommunication System
US20170338989A1 (en) * 2015-02-10 2017-11-23 Huawei Technologies Co., Ltd. Peak-to-Average Ratio Reduction Method, Apparatus, Device, and System
WO2020246818A1 (fr) * 2019-06-04 2020-12-10 엘지전자 주식회사 Procédé de transmission de signal en liaison latérale dans un système de communication sans fil
US20210377089A1 (en) * 2020-05-28 2021-12-02 Qualcomm Incorporated Peak reduction tone allocation techniques
CN114500208A (zh) * 2020-10-23 2022-05-13 诺基亚技术有限公司 用于降低峰均功率比的音调预留

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100118836A1 (en) * 2006-11-02 2010-05-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and Arrangement in a Telecommunication System
US20170338989A1 (en) * 2015-02-10 2017-11-23 Huawei Technologies Co., Ltd. Peak-to-Average Ratio Reduction Method, Apparatus, Device, and System
WO2020246818A1 (fr) * 2019-06-04 2020-12-10 엘지전자 주식회사 Procédé de transmission de signal en liaison latérale dans un système de communication sans fil
US20210377089A1 (en) * 2020-05-28 2021-12-02 Qualcomm Incorporated Peak reduction tone allocation techniques
CN114500208A (zh) * 2020-10-23 2022-05-13 诺基亚技术有限公司 用于降低峰均功率比的音调预留

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