WO2023169302A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2023169302A1
WO2023169302A1 PCT/CN2023/079331 CN2023079331W WO2023169302A1 WO 2023169302 A1 WO2023169302 A1 WO 2023169302A1 CN 2023079331 W CN2023079331 W CN 2023079331W WO 2023169302 A1 WO2023169302 A1 WO 2023169302A1
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Prior art keywords
signal
elements
physical resources
mod
fourier transform
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PCT/CN2023/079331
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English (en)
Chinese (zh)
Inventor
龚名新
曲秉玉
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华为技术有限公司
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Publication of WO2023169302A1 publication Critical patent/WO2023169302A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • 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

Definitions

  • the embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device.
  • Orthogonal frequency division multiplexing (OFDM) systems can provide better transmission quality, higher data rates and spectral efficiency.
  • OFDM symbols are superposed by multiple independently modulated sub-carrier signals, when the phases of each sub-carrier at a certain time domain sampling point are the same or similar, the superimposed signals of multiple sub-carriers will produce a larger signal.
  • instantaneous peak power which results in a higher peak-to-average power ratio (PAPR).
  • PAPR refers to the ratio between the peak power and the average power of the signal.
  • DFT-S-OFDM discrete fourier transform spread orthogonal frequency division multiplexing
  • Embodiments of the present application provide a communication method and device for reducing the PAPR of a signal and improving the coverage of the signal.
  • the first aspect provides a communication method, which can be executed by a terminal device, or by other devices with a signal sending function, or by a chip system or other functional modules that can realize the sending of signals. , for example, the chip system or other functional modules are installed in the terminal device.
  • the method includes:
  • [s(m)] consists of M elements, It consists of M elements, [k(m)] consists of M elements, M is a positive integer, elements in is e j ⁇ m , ⁇ is determined based on M, and the elements in [k(m)] are m belongs to ⁇ 0,...,M-1 ⁇ .
  • the terminal device performs phase rotation on the modulation symbol of the information to be sent according to the phase rotation factor to obtain [k(m)], so that the waveform corresponding to two adjacent elements in [k(m)]
  • the phase difference is far from 0 degrees or 180 degrees, which reduces the peak value of the waveform corresponding to the modulation symbols corresponding to two adjacent elements after superposition, thereby reducing the PAPR of the first signal generated by [k(m)] and improving the coverage of the first signal.
  • the first signal may be a signal generated by [k(m)] in any of the following four ways.
  • the first signal is a signal generated by [k(m)] after discrete Fourier transform, cyclic expansion and mapping of physical resources.
  • [k(m)] is obtained through discrete Fourier transform [X 2 (m)]
  • [X 2 (m)] is composed of M elements
  • [X 2 (m)] is obtained through cyclic expansion [X 1 (q)]
  • [X 1 (q)] consists of Q elements
  • Q is the sum of M and E
  • E is a positive integer
  • the element X 1 (q) in [X 1 (q)] ) is X 2 ((q+MP)mod M)
  • the M is an element in [X 2 (m)]
  • a mod B represents the remainder of A divided by B
  • P is an integer greater than or equal to 0 and less than or equal to E
  • q belongs to ⁇ 0,...,Q-1 ⁇
  • the [X 1 (q)] obtains the first signal by mapping physical resources.
  • [k(m)] generates a transmissible first signal through DFT, cyclic expansion and mapping of physical resources, so that information can be sent.
  • the cyclic extension processing can increase the time difference between waveforms corresponding to adjacent modulation symbols, reduce the peak value after superposition of waveforms corresponding to different modulation symbols, and further reduce the PAPR of the first signal.
  • the first signal is a signal generated by [k(m)] after discrete Fourier transform, cyclic expansion, filtering and mapping of physical resources.
  • [k(m)] undergoes discrete Fourier transform to obtain [X 2 (m)]
  • [X 2 (m)] is composed of M elements
  • [X 2 (m)] undergoes cyclic expansion to obtain [ X 1 (q)], where [X 1 (q)] consists of Q elements, Q is the sum of M and E, E is a positive integer
  • the element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M)
  • P is an integer greater than or equal to 0 and less than or equal to E
  • q belongs to ⁇ 0,...,Q-1 ⁇
  • [X 1 (q)] is obtained by filtering [X 3 (q)], where [X 3 (q)] consists of Q elements
  • [X 3 (q)] obtains
  • [k(m)] can generate a transmittable first signal after undergoing DFT, cyclic expansion, filtering and mapping physical resources, so that information can be sent.
  • the cyclic expansion can increase the time difference between the waveforms corresponding to adjacent modulation symbols and reduce the peak value after the superposition of waveforms corresponding to different modulation symbols.
  • the filtering process can reduce the side lobes of the waveforms corresponding to the modulation symbols, and can also reduce the peak value of the waveforms corresponding to different modulation symbols.
  • the PAPR of the first signal can be reduced.
  • the first signal is a signal generated by [k(m)] after discrete Fourier transform and mapping of physical resources.
  • [k(m)] is obtained by discrete Fourier transform [X 2 (m)]
  • [X 2 (m)] is composed of M elements
  • [X 2 (m)] is obtained by mapping physical resources The first signal.
  • the first signal is a signal generated by [k(m)] after discrete Fourier transform, filtering and mapping of physical resources.
  • [k(m)] undergoes discrete Fourier transform to obtain [X 2 (m)], [X 2 (m)] consists of M elements;
  • [X 2 (m)] undergoes filtering processing to obtain [ X 4 (m)], where [X 4 (m)] consists of M elements;
  • [X 4 (m)] obtains the first signal by mapping physical resources.
  • element X 4 (m) in [X 4 (m)] is X 2 (m) ⁇ w 2 (m), w 2 (m) is w 2 (M-1-m); [X 4 (m)] obtain the first signal by mapping physical resources.
  • [k(m)] can be generated after DFT, filtering and mapping of physical resources.
  • a signal so that information can be sent.
  • the filtering process therein can further reduce the PAPR of the first signal.
  • the first signal is generated according to [k(m)], specifically: according to [k(m)], obtain [X 1 (q)], where, [X 1 (q) )] consists of Q elements, Q is the sum of M and E, E is a positive integer, the element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M), the X 2 ((q+MP)modM) is the element in [X 2 (m)], [X 2 (m)] is the M symbols obtained by performing discrete Fourier transform on [k(m)], A mod B represents the remainder of A divided by B, P is an integer greater than or equal to 0 and less than or equal to E, q belongs to ⁇ 0,...,Q-1 ⁇ ; map Q elements of [X 1 (q)] onto Q subcarriers to generate a first signal.
  • generating the first signal based on [k(m)] may also be: obtaining [X 1 (q)] based on [k(m)], where [X 1 (q)] consists of Q elements, Q is the sum of M and E, E is a positive integer, the element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M), the X 2 ((q+MP) mod M) is the element in [X 2 (m)], [X 2 (m)] is the M symbols obtained by performing the discrete Fourier transform on [k(m)], A mod B means A divided by B The remainder of , [X 3 (q)] consists of Q elements; map the Q elements of [X 3 (q)] to Q subcarriers to generate the first signal.
  • the element X 3 (q) in [X 3 (q)] can be X 1 (q) ⁇ w 1 (q), and the w 1 (q) is w 1 (Q-1-q) .
  • generating the first signal based on [k(m)] may also include: performing discrete Fourier transform processing on the M elements of [k(m)] to obtain [X 2 (m)], [X 2 ( m)] consists of M elements; filter [X 2 (m)] to obtain [X 4 (m)], where [X 4 (m)] consists of M elements; [X 4 (m)] )] are mapped to M subcarriers to generate the first signal.
  • the element X 4 (m) in [X 4 (m)] is X 2 (m) ⁇ w 2 (m), and the w 2 (m) is w 2 (M-1-m).
  • the terminal device can use multiple methods to generate a transmissible first signal based on [k(m)], thereby realizing the sending of information, and the implementation method is flexible.
  • the value of the phase rotation factor is not only related to the number of subcarriers required before cyclic expansion, but also to the number of added subcarriers after cyclic expansion and the number of cyclically expanded elements before the first element.
  • [s(m)] can be phase-rotated adaptively to reduce the PAPR of the first signal.
  • the modulation method of [s(m)] is four-phase phase shift keying QPSK, and ⁇ is ⁇ ( ⁇ M/4+E-2P-1)/M; or, ⁇ is close to ⁇ ( ⁇ M/4+E-2P-1)/M.
  • the second aspect provides a communication method, which can be executed by a terminal device, or by other devices with a signal sending function, or by a chip system or other functional modules that can realize the sending of signals. , for example, the chip system or other functional modules are installed in the terminal device.
  • the method includes:
  • [s(m)] consists of M elements, M is a positive integer, [X 5 (q)] consists of Q elements, Q is the sum of M and E, and E is a positive integer, where [X 5 (q)] element X 5 (q) is X 6 ((q+MP)mod M), which X 6 ((q+MP)mod M) is an element in [X 6 (m)], X 6 (m)] is obtained by performing discrete Fourier transform on [s(m)] M symbols, A mod B represents the remainder of A divided by B, P is determined based on M, P is an integer greater than or equal to 0 and less than or equal to E, P is not equal to (EP), m belongs to ⁇ 0 ,...,M-1 ⁇ , q belongs to ⁇ 0,...,Q-1 ⁇ .
  • the terminal device performs asymmetric cyclic expansion of the frequency domain sequence of the information to be transmitted, that is, the number of elements that need to be expanded before the first element of [X 6 (m)] is equal to the number of elements of [X 6 (m)].
  • the number of elements that need to be expanded after the last element of m)] is not equal, which can reduce the peak value of the waveform corresponding to the modulation symbol corresponding to the two adjacent elements after superposition, thereby reducing the number of elements generated by [X 5 (q)] the PAPR of the first signal, and improve the coverage of the first signal.
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and P is an integer determined based on ( ⁇ M/4+E-1)/2.
  • a communication method which method can be executed by a terminal device, or by other devices with a signal sending function, or by a chip system or other functional modules that can realize the sending of signals.
  • the chip system or other functional modules are installed in the terminal device.
  • the method includes:
  • the terminal equipment performs a cyclic shift on the frequency domain sequence of the information to be transmitted, which can reduce the peak value of the waveform corresponding to the modulation symbols corresponding to two adjacent elements after superposition, thereby reducing the waveform caused by [X 8 (m)] generates a PAPR of the first signal, and improves the coverage of the first signal.
  • the first signal is a signal generated after [X 8 (m)] is filtered and mapped to physical resources.
  • [X 8 (m)] is filtered to obtain [X 9 (m)]
  • [X 9 (m)] is composed of M elements; and, [X 9 (m)] is obtained through mapping physics Resources get the first signal.
  • element X 9 (m) in [X 9 (m)] is X 8 (m) ⁇ w 4 (m), and w 4 (m) is w 4 (M-1-m).
  • generating the first signal based on [X 8 (m)] can also be: filtering [X 8 (m)] to obtain [X 9 (m)], [X 9 (m)] is composed of M elements ; and, map M elements of [X 9 (m)] to M subcarriers to generate the first signal.
  • element X 9 (m) in [X 9 (m)] is X 8 (m) ⁇ w 4 (m), and w 4 (m) is w 4 (M-1-m).
  • the terminal device can use multiple methods to generate a transmissible first signal based on [X 8 (m)], thereby realizing the sending of information, and the implementation method is flexible.
  • the filtering process can reduce the side lobes of the waveform corresponding to the modulation symbol, and can also reduce the peak value after superposition of the waveforms corresponding to different modulation symbols, thereby reducing the PAPR of the first signal.
  • the fourth aspect provides a communication method, which can be executed by a base station, or by other devices with signal receiving functions, or by a chip system or other functional modules that can realize signal reception,
  • the chip system or other functional modules are installed in the base station.
  • the method includes:
  • a first signal is received, and [s(m)] is obtained from the first signal.
  • the first signal is a signal generated based on [k(m)], [k(m)] is based on the modulation symbol [s(m)] and the phase rotation factor Determined M symbols, where [s(m)] consists of M elements, It consists of M elements, M is a positive integer, elements in is e j ⁇ m , ⁇ is determined based on M, and the element k(m) in [k(m)] is m belongs to ⁇ 0,...,M-1 ⁇ .
  • [s(m)] can be the modulation symbol obtained from the first signal in the following way:
  • [s(m)] is the modulation symbol obtained by demapping physical resources, equalization, decyclic expansion, inverse discrete Fourier transform and dephase rotation of the first signal;
  • [s(m)] is the modulation symbol obtained by demapping physical resources, equalization, inverse discrete Fourier transform and de-phase rotation of the first signal.
  • the first signal is a signal generated according to [k(m)], which can be: the first signal is a signal obtained by mapping physical resources to [X 1 (q)], where, [X 1 (q)] consists of Q elements, Q is the sum of M and E, and E is a positive integer; [X 1 (q)] is Q symbols obtained by cyclic expansion of [X 2 (m)], where, The element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M), and the X 2 ((q+MP)mod M) is in [X 2 (m)] Element, A mod B represents the remainder of A divided by B, P is an integer greater than or equal to 0 and less than or equal to E, q belongs to ⁇ 0,...,Q-1 ⁇ ; [X 2 (m)] is [k (m)]M symbols obtained by discrete Fourier transform.
  • the first signal is a signal generated based on [k(m)], or it can be: the first signal is a signal obtained by mapping physical resources to [X 3 (q)], where [X 3 (q)] is obtained by It consists of Q elements, Q is the sum of M and E, and E is a positive integer; [X 3 (q)] is the Q symbols obtained by filtering [X 1 (q)]; [X 1 (q)] is Q symbols obtained by [X 2 (m)] after cyclic expansion, where the element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M), which is an element in [X 2 (m)], A mod B represents the remainder of A divided by B, P is an integer greater than or equal to 0 and less than or equal to E, q belongs to ⁇ 0,...,Q-1 ⁇ ; [X 2 (m)] is the M symbols obtained by discrete Fourier transform of [k(m)].
  • the first signal is a signal generated based on [k(m)], or it can be: the first signal is a signal obtained by mapping physical resources to [X 2 (m)]; [X 2 (m)] is [k (m)]M symbols obtained by discrete Fourier transform.
  • the first signal is a signal generated based on [k(m)], or it can also be: the first signal is a signal obtained by mapping physical resources to [X 4 (m)]; [X 4 (m)] is [X 2 (m)] M symbols obtained by filtering, where [X 4 (m)] consists of M elements; [X 2 (m)] is obtained by [k (m)] through discrete Fourier transform M symbols.
  • element X 4 (m) in [X 4 (m)] is X 2 (m) ⁇ w 2 (m), and w 2 (m) is w 2 (M-1-m).
  • ⁇ is determined based on M, which can be: ⁇ is determined based on M, P and E.
  • the modulation method of [s(m)] is four-phase phase shift keying QPSK, ⁇ is ⁇ ( ⁇ M/4+E-2P-1)/M, or ⁇ is close to ⁇ ( ⁇ M/4+E-2P-1)/M.
  • the modulation method of [s(m)] is four-phase phase shift keying QPSK, ⁇ is ⁇ ( ⁇ M/4-1)/M, or ⁇ is ⁇ ( ⁇ M /4-1)/M.
  • a communication method which method can be executed by a base station, or by other equipment with a signal receiving function, or by a chip system or other functional modules that can realize the reception of signals,
  • the chip system or other functional modules are installed in the base station.
  • the method includes:
  • a first signal is received, and [s(m)] is obtained from the first signal.
  • the first signal is a signal generated according to [X 5 (q)], [X 5 (q)] is Q symbols determined according to the modulation symbol [s(m)], where, [s(m)] It is composed of M elements, M is a positive integer, Q is the sum of M and E, E is a positive integer, the element X 5 (q) in [X 5 (q)] is X 6 ((q+MP)mod M ) , this symbols, A mod B represents the remainder of A divided by B, P is determined based on M, P is an integer greater than or equal to 0 and less than or equal to E, P is not equal to (EP), m belongs to ⁇ 0,... , M-1 ⁇ , q belongs to ⁇ 0,...,Q-1 ⁇ .
  • [s(m)] can be the modulation symbol obtained from the first signal in the following way:
  • [s(m)] is the modulation symbol obtained by demapping physical resources, equalization, decyclic expansion, and inverse discrete Fourier transform of the first signal.
  • P is determined based on M, including: P is determined based on M and E.
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and P is an integer determined based on ( ⁇ M/4+E-1)/2.
  • the first signal is a signal generated according to [X 5 (q)], which may be: the first signal is a signal obtained by mapping physical resources to [X 5 (q)].
  • the first signal is a signal generated based on [X 5 (q)], or it can be: the first signal is a signal obtained by mapping physical resources to [X 7 (q)]; [X 7 (q)] is [ X 5 (q)] Q symbols obtained through filtering processing, where [X 7 (q)] includes Q elements.
  • element X 7 (q) in [X 7 (q)] is X 5 (q) ⁇ w 3 (q), and w 3 (q) is w 3 (Q-1-q).
  • a communication method which method can be executed by a base station, or by other equipment with a signal receiving function, or by a chip system or other functional modules that can realize the reception of signals,
  • the chip system or other functional modules are installed in the base station.
  • the method includes:
  • a first signal is received, and [s(m)] is obtained from the first signal.
  • the first signal is a signal generated according to [X 8 (m)], and [X 8 (m)] is generated based on M symbols determined according to the modulation symbol [s(m)], where, [s(m)] It consists of M elements, M is a positive integer, and the element X 8 (m) in [X 8 (m)] is X 6 ((q+MP)mod M), which is the element in [X 6 (m)], [X 6 (m)] is the M symbols obtained by performing discrete Fourier transform on [s(m)], A mod B represents the remainder of A divided by B, P is determined based on M, P is a positive integer, and m belongs to In ⁇ 0,...,M-1 ⁇ .
  • [s(m)] can be the modulation symbol obtained from the first signal in the following way:
  • [s(m)] is the modulation symbol obtained by demapping physical resources, equalization, decyclic shift, and inverse discrete Fourier transform of the first signal.
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and P is an integer determined based on ( ⁇ M/4-1)/2.
  • the first signal is a signal generated based on [X 8 (m)], or it can be: the first signal is a signal obtained by mapping physical resources to [X 9 (m)], and [X 9 (m)] is obtained by M It consists of elements; [X 9 (m)] is M symbols obtained by filtering [X 8 (m)].
  • element X 9 (m) in [X 9 (m)] is X 8 (m) ⁇ w 4 (m), and w 4 (m) is w 4 (M-1-m).
  • a communication device configured to perform the method described in the above fourth to sixth aspects and any one of their possible implementations.
  • the communication device is, for example, a base station, or a functional module in the base station, such as a baseband device or a chip system.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication device includes a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit).
  • a processing module sometimes also called a processing unit
  • transceiver module sometimes also called a transceiver unit
  • a communication device may include one or more processors.
  • the communication device may also include a memory.
  • the memory is used to store one or more computer programs or instructions.
  • the one or more processors are configured to execute the one or more computer programs or instructions stored in the memory, so that the communication device executes the above first to third aspects and any possible implementation manner thereof. the method described in .
  • a communication device may include one or more processors.
  • the communication device may also include a memory.
  • the memory is used to store one or more computer programs or instructions.
  • the one or more processors are configured to execute the one or more computer programs or instructions stored in the memory, so that the communication device executes the above fourth to sixth aspects and any possible implementation manner thereof. the method described in .
  • a communication system in an eleventh aspect, includes the communication device described in the seventh aspect, and/or the communication device described in the eighth aspect.
  • a computer-readable storage medium is provided.
  • the computer-readable storage medium is used to store a computer program or instructions. When executed, the computer-readable storage medium makes it possible to make any one of the above first to third aspects possible.
  • the method described in the implementation manner is realized, or the methods described in the above fourth to sixth aspects and any one of the possible implementation methods thereof are realized. The method described above is implemented.
  • a thirteenth aspect provides a computer program product containing instructions that, when run on a computer, enables the methods described in the above first to third aspects and any of their possible implementations to be implemented, or The method described in the above-mentioned fourth aspect to sixth aspect and any possible implementation manner thereof is realized.
  • Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of the signal transmission process of DFT-s-OFDM waveform
  • Figure 3 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 4a is a schematic diagram of loop expansion provided by the embodiment of the present application.
  • Figure 4b is a schematic diagram of phase rotation provided by an embodiment of the present application.
  • Figure 4c is a schematic diagram of filtering provided by an embodiment of the present application.
  • Figure 5a is a schematic diagram of generating a first signal provided by an embodiment of the present application.
  • Figure 5b is another schematic diagram of generating a first signal provided by an embodiment of the present application.
  • Figure 5c is another schematic diagram of generating a first signal provided by an embodiment of the present application.
  • Figure 5d is another schematic diagram of generating a first signal provided by an embodiment of the present application.
  • Figure 6a is a schematic diagram of obtaining [s(m)] provided by the embodiment of the present application.
  • Figure 6b is another schematic diagram of obtaining [s(m)] provided by the embodiment of the present application.
  • Figure 7 is a schematic flow chart of another communication method provided by an embodiment of the present application.
  • Figure 8 is another schematic diagram of loop expansion provided by the embodiment of the present application.
  • FIG. 9 is a schematic flowchart of yet another communication method provided by an embodiment of the present application.
  • Figure 10 is another schematic diagram of cyclic shift provided by an embodiment of the present application.
  • the methods and devices provided by the embodiments of this application can be applied to various communication systems, such as fifth generation (5th generation, 5G), new radio (NR), long term evolution (long term evolution, LTE), Internet of Things (Internet of things, IoT), wireless-fidelity (WiFi), wireless communications related to the 3rd generation partnership project (3GPP), or other wireless communications that may appear in the future.
  • 5G fifth generation
  • NR new radio
  • LTE long term evolution
  • IoT Internet of things
  • WiFi wireless-fidelity
  • 3GPP 3rd generation partnership project
  • the mobile phones in Figure 1 include 120a, 120e, 120f and 120j.
  • the mobile phone 120a can access the base station 110a, connect to the car 120b, communicate directly with the mobile phone 120e and access the HAP.
  • the car 120b can access the HAP and communicate with the mobile phone 120a.
  • mobile phone 120f can be connected as micro station 110b, connected to laptop 120g, connected to printer 120h, and mobile phone 120j can control drone 120i.
  • the terminal device is a user-side device with wireless transceiver function.
  • Terminal equipment can also be called terminal, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • Communication between network equipment and terminal equipment, between network equipment and network equipment, and between terminal equipment and terminal equipment can be carried out through licensed spectrum, communication can also be carried out through unlicensed spectrum, or communication can be carried out through licensed spectrum and unlicensed spectrum at the same time.
  • Communication You can communicate through spectrum below 6 gigahertz (GHz), you can communicate through spectrum above 6GHz, and you can also communicate using spectrum below 6GHz and spectrum above 6GHz at the same time.
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the network device sends downlink signals or downlink information to the terminal device, and the downlink information is carried on the downlink channel; the terminal device sends uplink signals or uplink information to the network device, and the uplink information is carried on the uplink channel.
  • the terminal device needs to establish a wireless connection with the cell controlled by the network device.
  • the cell with which a terminal device has established a wireless connection is called the serving cell of the terminal device.
  • the terminal equipment maps the frequency domain sequence [X(0),...,X(M-1)] to M subcarriers, and performs N-point IFFT to obtain the time domain sequence [x(0),... ,x(N-1)].
  • the M subcarriers may be M continuous subcarriers or equally spaced M subcarriers, which is not limited in this embodiment of the present application.
  • the value of N can be determined based on the system bandwidth.
  • the terminal device can multiply the frequency domain sequence [X(0),...,X(M-1)] by the precoding matrix, After multiplication, it is mapped to M subcarriers, and N-point IFFT is performed.
  • S24 The terminal device adds a cyclic prefix (CP) to the time domain sequence [x(0),...,x(N-1)] and then performs digital-to-analog conversion to obtain an analog signal.
  • CP cyclic prefix
  • the terminal device sends the analog signal to the base station through the antenna.
  • the base station receives the analog signal.
  • phase rotation factor is recorded as in, Includes M phase rotation factors.
  • the phase rotation factor is written as That is a phase rotation factor.
  • the phase rotation factor is expressed as Describe as an example. Should It may also be called a phase rotation factor sequence, or a phase rotation factor set, etc., and the embodiments of the present application are not limited thereto. Should It consists of M elements. Should The M elements of can be respectively: elements in It can be e j ⁇ m , that is
  • the value of ⁇ is related to M, E and P. It can be understood that ⁇ is determined based on M, E and P.
  • the modulation mode of [s(m)] is QPSK, and the ⁇ can be ⁇ ( ⁇ M/4+E-2P-1)/M, or the value of ⁇ can be close to
  • the modulation mode of [s(m)] is BPSK, and the ⁇ can be ⁇ ( ⁇ M/2+E-2P-1)/M, or the value of ⁇ can be close to ⁇ ( ⁇ M/2+E- 2P-1)/M.
  • the modulation method of [s(m)] is ⁇ /2-BPSK, and the ⁇ can be ⁇ (E-2P-1)/M, or the value of ⁇ can be close to ⁇ (E-2P-1)/M .
  • Cyclic expansion of frequency domain sequences can also be called frequency domain extension (spectral extension).
  • cyclic expansion of frequency domain sequences is simply called cyclic expansion.
  • [X 2 (m)] is cyclically expanded by E elements, where P elements are expanded before the first element of [X 2 (m)], and (EP are expanded after the last element of [X 2 (m)] ) elements, get [X 1 (q)] composed of Q elements.
  • This [X 1 (q)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set, etc.
  • the name of [X 1 (q)] is not limited to this in the embodiment of the present application.
  • the sum of M and E may be determined by the frequency domain bandwidth to which the terminal device is scheduled, for example, by the number of resource blocks (RBs).
  • the embodiment of the present application is not limited to this. .
  • the first signal is a signal generated by [k(m)] after DFT, cyclic expansion and mapping of physical resources.
  • [k(m)] is processed by DFT to obtain [X 2 (m)]; this [X 2 (m)] is processed by cyclic expansion to obtain [X 1 (q)]; this [X 1 (q)] is mapped
  • the physical resource gets the first signal, as shown in Figure 5a.
  • the terminal device can obtain [X 1 (q)] based on [k(m)], filter the obtained [X 1 (q)], and obtain [X 3 (q) ], and map the Q elements of [X 3 (q)] to Q subcarriers to generate the first signal.
  • a transmissible first signal can be generated, thereby enabling the transmission of the first information.
  • the cyclic expansion can increase the time difference between the waveforms corresponding to adjacent modulation symbols and reduce the peak value after the superposition of waveforms corresponding to different modulation symbols.
  • the filtering process can reduce the side lobes of the waveforms corresponding to the modulation symbols, and can also reduce the peak value of the waveforms corresponding to different modulation symbols.
  • the PAPR of the first signal can be reduced.
  • X 4 (0) is X 2 (0) ⁇ w 2 (0)
  • X 4 (1) is X 2 (1) ⁇ w 2 (1)
  • X 4 (2) is X 2 (2) ⁇ w 2 (2)
  • X 4 (3) is X 2 (3) ⁇ w 2 (3).
  • S301 please refer to the relevant content of S301 for the specific description of [X 2 (m)] and mapped physical resources, which will not be described again here.
  • the w 2 (m) is an element in [w 2 (m)].
  • [w 2 (m)] consists of M elements, which correspond to M filter coefficients one-to-one.
  • the M elements of [w 2 (m)] can be respectively: w 2 (0),..., w 2 (M-1).
  • [w 2 (m)] may be predefined, but the embodiment of the present application is not limited thereto.
  • the M elements in [w 2 (m)] are symmetrically equal, that is, w 2 (m) is w 2 (M-1-m).
  • the [X 4 (m)] is the symmetrically filtered version of [X 2 (m)] Processing results in M symbols.
  • the terminal device maps M elements of [X 4 (m)] to M subcarriers.
  • the process of generating the first signal may specifically include: the terminal device maps M elements of [X 4 (m)] to M on the subcarriers, and perform N-point IFFT to obtain a time domain sequence [x(0),...,x(N-1)] composed of N elements; then the time domain sequence [x(0), ..., x(N-1)] is added to CP and then digital-to-analog conversion is performed to obtain the first signal; for details, please refer to the specific implementation processes of S23 and S24.
  • the terminal equipment maps M elements of [X 4 (m)] to M subcarriers, and the specific implementation of generating the first signal can also be implemented in other equivalent ways.
  • the embodiments of the present application are not limited to this.
  • the M subcarriers may be M continuous subcarriers or equally spaced M subcarriers, which is not limited in the embodiment of the present application.
  • the terminal device In S302, the terminal device generates a first signal according to [k(m)], and then the terminal device can execute the content shown in S303.
  • the terminal device sends the first signal to the base station.
  • the base station receives the first signal.
  • the terminal device sends the first signal to the base station through an antenna.
  • the base station receives the first signal through the antenna.
  • S304 The base station obtains [s(m)] from the first signal.
  • the base station can obtain [k(m)] from the first signal, and then obtain [s(m)] based on [k(m)]. Further, the base station can obtain the first information according to [s(m)]. For example, the base station demodulates and decodes [s(m)] to obtain the first signal. Or, in another possible implementation, the base station can also obtain [k(m)] from the first signal, and then obtain the first information based on [k(m)], without the need to obtain [k(m)] Get [s(m)]. For example, the base station can demodulate and decode according to [k(m)] to obtain the first information. It should be understood that the embodiment of the present application is not limited to the specific implementation manner in which the base station obtains the first information from the first signal.
  • the base station obtaining [k(m)] from the first signal can be understood as the reverse process (or called the reverse process) of the terminal device generating the first signal based on [k(m)].
  • [k(m)] is the M symbols obtained by demapping physical resources, equalization, decyclic expansion and inverse discrete Fourier transform (IDFT) of the first signal, as shown in Figure 6a Show.
  • the first signal undergoes demapping physical resource processing and equalization processing to obtain [X 1 (q)]; [X 1 (q)] undergoes decyclic expansion processing to obtain [X 2 (m)]; the [X 2 (m)] is processed by IDFT to obtain [k(m)].
  • [k(m)] is dephased and rotated to obtain [s(m)].
  • demapping physical resources refers to the reverse process of mapping physical resources, which can be understood as the process from starting to receive a transmissible analog signal to obtaining the frequency domain sequence corresponding to the information to be received. This process may specifically include digital-to-analog conversion of the analog signal and then CP to obtain a time domain sequence. The time domain sequence is subjected to FFT to obtain a frequency domain sequence corresponding to the information to be received. It should be understood that demapping physical resources can also be implemented in other equivalent ways, and the specific implementation process of demapping physical resources in the embodiments of the present application is not limited thereto.
  • the information to be received is the first information.
  • the frequency domain sequence corresponding to the information to be received is [X 2 (m)].
  • Equalization can be used to compensate for signal transmission, or the effects of signal transmission and filtering. For example, when receiving multiple antennas, this equalization can equalize multiple antenna reception. Due to the influence of the channel, the signal will be distorted during the transmission process, and the distortion caused during the signal transmission process can be compensated through equalization. It should be understood that the embodiment of the present application does not limit the specific implementation process of equalization.
  • the above-mentioned first signal undergoes demapping physical resource processing and equalization processing to obtain [X 1 (q)]. It can be understood that the first signal undergoes demapping physical resource processing and equalization processing, and the inverse operation of filtering is performed during the equalization process. [X 1 (q)] is obtained; alternatively, the first signal can also be obtained through other equivalent implementation methods, and [X 1 (q)] is obtained.
  • the embodiment of the present application is not limited thereto.
  • the process of the base station obtaining [X 1 (q)] based on the first signal may specifically include: the base station performs digital-to-analog conversion on the first signal and then performs CP processing to obtain a time domain sequence [x ( 0),...,x(N-1)]; perform N-point FFT on the time domain sequence [x(0),...,x(N-1)] to obtain N symbols; according to the frequency of the first signal
  • the Q symbols are taken out from the domain position, and then [X 1 (q)] composed of Q elements is obtained through equalization.
  • the base station can also adopt other equivalent methods to obtain [X 1 (q)] based on the first signal.
  • the embodiment of this application does not describe the specific implementation process of the base station obtaining [X 1 (q)] based on the first signal. It is not limited to this.
  • [k(m)] is the first signal obtained after demapping physical resources, equalization and IDFT M symbols, as shown in Figure 6b.
  • the first signal undergoes demapping physical resource processing and equalization processing to obtain [X 2 (m)];
  • [X 2 (m)] undergoes IDFT processing to obtain [k(m)].
  • [k(m)] is dephased and rotated to obtain [s(m)].
  • [X 2 (m)] and [k (m)] please refer to the relevant content of S301 and will not be repeated here.
  • demapping physical resources, equalization, and de-phase rotation please refer to the foregoing description, which will not be described again here.
  • the base station may obtain [X 2 (m)] according to the first signal, obtain [k(m)] according to the [X 2 (m)], and obtain [s(m)].
  • FIG 7 is a schematic flowchart of another communication method provided by an embodiment of the present application. As shown in Figure 7, this process may include the following content.
  • S701 The terminal device determines [X 5 (q)] based on the modulation symbol.
  • the modulation symbol is denoted as [s(m)].
  • [s(m)] includes M modulation symbols.
  • the modulation symbol is denoted as s(m), which is a modulation symbol.
  • the embodiment of the present application is described by taking the modulation symbol denoted as [s(m)] as an example.
  • the [s(m)] are M symbols obtained by modulating the first information, and the M symbols correspond to the M elements in [s(m)] one-to-one.
  • the terminal device can modulate the first information to obtain [s(m)], and the modulation method is not limited to QPSK, BPSK, ⁇ /2-BPSK or OQPSK.
  • [s(m)] and the first information please refer to the relevant content of S301, which will not be described again here.
  • the terminal device determines [X 5 (q)] based on [s(m)].
  • This [X 5 (q)] is Q symbols obtained by [s(m)] through DFT and cyclic expansion. Among them, [s(m)] can be obtained by DFT processing [X 6 (m)]; [X 6 (m)] can be obtained by cyclic expansion [X 5 (q)].
  • This [X 5 (q)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set, etc. The embodiment of the present application is not limited to this name of [X 5 (q)].
  • the [X 5 (q)] consists of Q elements.
  • the Q elements of [X 5 (q)] can be respectively: X 5 (0),..., X 5 (Q-1).
  • E is a positive integer, which is the number of elements expanded when the frequency domain sequence corresponding to the first information is cyclically expanded.
  • X 6 ((q+MP)mod M) is an element in [X 6 (m)].
  • a mod B means the remainder after dividing A by B.
  • P is an integer greater than or equal to 0 and less than or equal to E.
  • P is the number of elements that need to be expanded before the first element of [X 6 ( m)] during loop expansion.
  • P is not equal to (EP), that is, the number of elements that need to be expanded before the first element of [X 6 (m)] when [X 6 (m)] is expanded in a loop, this [X 6 (m)] The number of elements that need to be extended after the last element of is not equal.
  • EP the number of elements that need to be expanded before the first element of [X 6 (m)] when [X 6 (m)] is expanded in a loop, this [X 6 (m)]
  • the number of elements that need to be extended after the last element of is not equal.
  • the first element of [X 6 (m)] is X 6 (0) and the last element of [X 6 (m)] is X 6 (M-1).
  • the value of P is related to M, which can be understood as P is determined based on M.
  • P is determined based on M and E.
  • the modulation mode of [s(m)] is QPSK
  • P can be an integer determined based on ( ⁇ M/4+E-1)/2.
  • the P may be an integer value of ( ⁇ M/4+E-1)/2, or an integer value close to ( ⁇ M/4+E-1)/2.
  • P may be an integer value of ( ⁇ M/4+E-1)/2, or the value of P may be close to an integer value of ( ⁇ M/4+E-1)/2.
  • the integer value involved in the embodiment of the present application may be an integer value obtained by rounding operation, that is, the P is a rounded value equal to or close to ( ⁇ M/4+E-1)/2
  • the integer of the rounding operation result but the embodiment of the present application is not limited to this.
  • P can also be an upward rounding operation or a downward rounding operation that is close to or equal to ( ⁇ M/4+E-1)/2. integer.
  • the value of P is related to M, where M can be understood as the number of elements contained in [s(m)], or as the mapping of [X 6 (m)] to subcarriers. the number of subcarriers, but the embodiment of the present application is not limited to this.
  • E can be understood as the number of elements that need to be expanded during [X 6 (m)] cyclic expansion, or as the number of subcarriers mapped by the expanded elements during [X 6 (m)] cyclic expansion.
  • the embodiments of the present application are not limited to this.
  • the sum of M and E, that is, Q, may be determined by the frequency domain bandwidth to which the terminal device is scheduled, for example, by the number of RBs.
  • the embodiment of the present application is not limited to this.
  • the terminal device determines [X 5 (q)] based on [s(m)], which can be understood as the terminal device performs DFT processing on [s(m)] to obtain [X 6 (m)], and then performs [X 6 (m)] performs cyclic expansion to obtain [X 5 (q)]; or, the terminal device determines [X 5 (q)] based on [s(m)], which can also be understood as the terminal device pair s(m)] Perform DFT processing, and perform cyclic expansion during the DFT processing process to obtain [X 5 (q)]; alternatively, the terminal device determines [X 5 (q)] based on [s(m)], which can also be implemented in other equivalent ways.
  • the embodiment of the present application is not limited to the specific implementation process of the terminal device determining [X 5 (q)] based on [s(m)].
  • the first signal may be [X 5 (q)] generated after mapping physical resources; or, the first signal may be [X 5 (q)] after filtering and mapping physical resources.
  • the generated signal it should be understood that the embodiment of the present application is not limited to the specific implementation process of generating the first signal. For descriptions of mapping physical resources and filtering, please refer to the relevant description of S302 and will not be repeated here.
  • the first signal is a signal generated by [X 5 (q)] after mapping physical resources.
  • the terminal device may map Q elements in [X 5 (q)] to Q subcarriers to generate the first signal.
  • the terminal device can map Q elements in [X 5 (q)] to Q subcarriers and perform N-point IFFT to obtain a time domain sequence composed of N elements [x(0),... , x(N-1)]; then add CP to the time domain sequence [x(0),...,x(N-1)] and perform digital-to-analog conversion to obtain the first signal.
  • the terminal device can also use other equivalent methods to map Q elements in [X 5 (q)] onto Q subcarriers to generate the first signal, and the embodiments of the present application are not limited thereto.
  • the Q subcarriers may be continuous Q subcarriers or equally spaced Q subcarriers, which is not limited in the embodiment of the present application.
  • the first signal is a signal generated after [X 5 (q)] is filtered and mapped to physical resources. [X 5 (q)] is filtered to obtain [X 7 (q)]; [X 7 (q)] is the first signal after mapping physical resources.
  • the terminal device can filter [X 5 (q)] to obtain [X 7 (q)], and then map Q elements of [X 7 (q)] to Q subcarriers on, generating the first signal.
  • [X 7 (q)] consists of Q elements.
  • the [X 7 (q)] can be respectively: X 7 (0),..., X 7 (Q-1) for Q elements.
  • This [X 7 (q)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set.
  • the name of [X 7 (q)] in the embodiment of the present application is not limited to this.
  • the element X 7 (q) in [X 7 (q)] is the product of the element X 5 (q) in [X 5 (q)] and the filter coefficient w 3 (q), that is, [X 7 (q)] element X 7 (q) is X 5 (q) ⁇ w 3 (q).
  • X 7 (0) is X 5 (0) ⁇ w 3 (0)
  • X 7 (1) is X 5 (1) ⁇ w 3 (1)
  • X 7 (2) is X 5 (2) ⁇ w 3 (2)
  • X 7 (3) is X 5 (3) ⁇ w 3 (3).
  • S301 please refer to the relevant content of S301 for the specific description of [X 2 (m)] and mapped physical resources, which will not be described again here.
  • the w 3 (q) is an element in [w 3 (q)].
  • [w 3 (q)] consists of Q elements, which correspond to Q filter coefficients one-to-one.
  • the Q elements of [w 3 (q)] can be respectively: w 3 (0),..., w 3 (Q-1).
  • [w 3 (q)] may be predefined, but the embodiment of the present application is not limited thereto.
  • the Q elements in [w 3 (q)] are symmetrically equal, that is, w 3 (q) is w 3 (Q-1-q).
  • Q 6
  • w 3 (0) w 3 (5)
  • w 3 (1) w 3 (4)
  • w 3 (2) w 3 (3).
  • [X 7 (q)] is [X 5 (q)] and obtains Q symbols through symmetric filtering.
  • the terminal device filters [X 5 (q)]. It can be understood that the terminal device multiplies the element X 5 (q) in [X 5 (q)] by the filter coefficient w 3 (q) to obtain Q elements. Elements composed of [X 7 (q)]. It should be understood that the terminal device can filter [X 5 (q)] through the above frequency domain filtering method, or through other equivalent methods, such as filtering in the time domain. In the embodiment of the present application It is not limited to this.
  • the terminal device maps Q elements of [X 7 (q)] to Q subcarriers.
  • the process of generating the first signal may specifically include: the terminal device maps Q elements of [X 7 (q)] to Q on the subcarriers, and perform N-point IFFT to obtain a time domain sequence [x(0),...,x(N-1)] composed of N elements; then the time domain sequence [x(0), ...,x(N-1)] After adding CP, digital-to-analog conversion is performed to obtain the first signal.
  • the terminal device can also use other equivalent methods to map Q elements of [X 7 (q)] onto Q subcarriers to generate the first signal, and the embodiments of the present application are not limited thereto.
  • the Q subcarriers may be continuous Q subcarriers or equally spaced Q subcarriers, which is not limited in the embodiment of the present application.
  • S703 The terminal device sends the first signal to the base station.
  • the base station receives the first signal.
  • the terminal device sends the first signal to the base station through an antenna.
  • the base station can receive the first signal through the antenna.
  • the base station obtains [s(m)] from the first signal.
  • the base station can obtain [X 5 (q)] from the first signal, and then obtain [s(m)] based on [X 5 (q)]. Further, the base station can obtain the first information according to [s(m)]. For example, the base station demodulates and decodes [s(m)] to obtain the first signal. Or, in another possible implementation, the base station can also obtain [X 5 (q)] from the first signal, and then obtain the first information based on [X 5 (q)], without the need to obtain the first information based on [X 5 (q)]. q)] gets [s(m)]. For example, the base station can demodulate and decode according to [X 5 (q)] to obtain the first information. It should be understood that the embodiment of the present application is not limited to the specific implementation manner in which the base station obtains the first information from the first signal.
  • the base station obtaining [X 5 (q)] from the first signal can be understood as the reverse process of the terminal device generating the first signal according to [X 5 (q)].
  • [X 5 (q)] may be Q symbols obtained by demapping physical resources and equalizing the first signal. It should be understood that the specific implementation process of obtaining [s(m)] by the base station in the embodiment of the present application is not limited to this. For the description of demapping physical resources and balancing, please refer to the relevant description of S304.
  • [X 5 (q)] is Q symbols obtained by demapping physical resources and equalizing the first signal.
  • [s(m)] may be M symbols obtained by demapping physical resources, equalization, decyclic spreading and IDFT of the first signal.
  • the first signal is de-mapping physical resources and equalizing to obtain [X 5 (q)]; the [X 5 (q)] is decyclically expanded to obtain [X 6 (m)]; the [X 6 (m)] is obtained IDFT processing results in [s(m)].
  • the de-loop expansion please refer to the relevant content of S304, which will not be described again here.
  • the base station can obtain [X 5 (q)] according to the first signal, and obtain [s(m)] according to [X 5 (q)].
  • the process of the base station obtaining [X 5 (q)] based on the first signal may specifically include: the base station performs digital-to-analog conversion on the first signal and then performs CP processing to obtain a time domain sequence [x ( 0),...,x(N-1)]; perform N-point FFT on the time domain sequence [x(0),...,x(N-1)] to obtain N symbols, and according to the first signal Q symbols are taken out from the frequency domain position, and then [X 5 (q)] composed of Q elements is obtained through equalization.
  • the base station can also adopt other equivalent methods to obtain [X 5 (q)] based on the first signal.
  • the embodiment of this application does not describe the specific implementation process of the base station obtaining [X 5 (q)] based on the first signal. It is not limited to this.
  • the base station obtains [s(m)] based on [X 5 (q)], which can be understood as the base station performs decyclic expansion processing on [X 5 (q)] to obtain [X 6 (m)], and then [X 6 (m) )] to perform IDFT processing to obtain [s(m)]; or, the base station obtains [s(m)] based on [X 5 (q)], which can also be understood as the base station performs IDFT processing on [X 5 (q)], and During the IDFT process, decyclic expansion is performed to obtain [s(m)]; or, the base station can obtain [s(m)] based on [X 5 (q)] and other equivalent methods can also be used.
  • the specific implementation process of obtaining [s(m)] based on [X 5 (q)] is not limited to this.
  • the terminal device performs asymmetric cyclic expansion on the frequency domain sequence of the first information, that is, the number of elements that need to be expanded before the first element of [X 6 (m)] is equal to the number of elements that need to be expanded before the first element of [X 6 (m)]. )]
  • the number of elements that need to be expanded after the last element is not equal, which can reduce the peak value of the waveform corresponding to the modulation symbol corresponding to the two adjacent elements after superposition, thereby reducing the waveform generated by [X 5 (q)] PAPR of the first signal, and improve the coverage of the first signal.
  • FIG 9 is a schematic flowchart of another communication method provided by an embodiment of the present application. As shown in Figure 9, this process may include the following content.
  • the terminal device determines [X 8 (m)] based on the modulation symbol.
  • the modulation symbol is denoted as [s(m)].
  • [s(m)] includes M modulation symbols.
  • the modulation symbol is denoted as s(m), which is a modulation symbol.
  • the embodiment of the present application is described by taking the modulation symbol denoted as [s(m)] as an example.
  • the [s(m)] are M symbols obtained by modulating the first information, and the M symbols correspond to the M elements in [s(m)] one-to-one.
  • the terminal device can modulate the first information to obtain [s(m)], and the modulation method is not limited to QPSK, BPSK, ⁇ /2-BPSK or OQPSK.
  • [s(m)] and the first information please refer to the relevant content of S301, which will not be described again here.
  • the terminal device determines [X 8 (m)] based on [s(m)].
  • This [X 8 (m)] is M symbols obtained by [s(m)] through DFT and cyclic shift. Among them, [s(m)] can be obtained by DFT processing [X 6 (m)]; [X 6 (m)] can be obtained by cyclic shift [X 8 (m)].
  • the M elements of [X 8 (m)] can be respectively: X 8 (0),..., X 8 (M-1).
  • This [X 8 (m)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set, etc.
  • the embodiment of the present application is not limited to this name of [X 8 (m)].
  • the circular shift refers to circularly shifting the M symbols in [X 6 (m)], that is, circularly moving the positions of the M symbols in [X 6 (m)].
  • element X 8 (m) in [X 8 (m)] can be X 6 ((m+MP)mod M).
  • the X 6 ((m+MP) mod M) is an element in [X 6 (m)].
  • a mod B means the remainder after dividing A by B.
  • P is a positive integer. This P can be understood as the number of positions moved by the M symbols in [X 6 (m)] during cyclic shift.
  • the frequency domain sequence before cyclic shift is composed of X 6 (0), X 6 (1), X 6 (2 ), X 6 (3), X 6 ( 4), X 6 (5), X 6 ( 6), and ], consisting of X 6 (6), X 6 (7), X 6 ( 0), X 6 (1), X 6 (2), X 6 ( 3), )composition.
  • the value of P is related to M, which can be understood as P is determined based on M.
  • the modulation mode of [s(m)] is QPSK
  • P can be an integer determined based on ( ⁇ M/4-1)/2.
  • the P may be an integer value of ( ⁇ M/4-1)/2, or an integer value close to ( ⁇ M/4-1)/2.
  • P may be an integer value of ( ⁇ M/4-1)/2, or the value of P may be close to an integer value of ( ⁇ M/4-1)/2.
  • the terminal device determines [X 8 (m)] based on [s(m)], which can be understood as the terminal device performs DFT processing on [s(m)] to obtain [X 6 (m)], and then performs [X 6 (m)] performs a cyclic shift to obtain [X 8 (m)]; alternatively, the terminal device determines [X 8 (m)] based on [s(m)], which can also be understood as the terminal device's pair of s(m) ] performs DFT processing, and performs cyclic shifting during the DFT processing to obtain [
  • the entity implementation process is not limited to this.
  • the terminal device determines [X 8 (m)] based on [s(m)], which can also be expressed as the terminal device determines X 8 (m) based on s(m).
  • the terminal device can map M elements in [X 8 (m)] to M subcarriers to generate the first signal, and it can also be implemented in other ways, and the embodiment of the present application is not limited thereto.
  • the M subcarriers may be M continuous subcarriers or equally spaced M subcarriers, which is not limited in the embodiment of the present application.
  • the terminal equipment maps M elements of [X 9 (m)] to M subcarriers.
  • the process of generating the first signal may specifically include: the terminal equipment maps M elements of [X 9 (m)] to M on the subcarriers, and perform N-point IFFT to obtain a time domain sequence [x(0),...,x(N-1)] composed of N elements; then the time domain sequence [x(0), ..., x(N-1)], add CP and perform digital-to-analog conversion to obtain the first signal.
  • the terminal device can also use other equivalent methods to map M elements of [X 9 (m)] onto M subcarriers to generate the first signal, and the embodiments of the present application are not limited thereto.
  • the M subcarriers may be M continuous subcarriers or equally spaced M subcarriers, which is not limited in the embodiment of the present application.
  • the terminal device sends the first signal to the base station; accordingly, the base station receives the first signal.
  • the base station can obtain [X 8 (m)] according to the first signal, and obtain [s(m)] according to [X 8 (m)].
  • the base station obtains [s(m)] based on [X 8 (m)], which can be understood as the base station performs decyclic shift processing on [X 8 (m)] to obtain [X 6 (m)], and then [X 6 ( m)] performs IDFT processing to obtain [s(m)]; or, the base station obtains [s(m)] based on [X 8 (m)], which can also be understood as the base station performs IDFT processing on [X 8 (m)], And perform decyclic shift during the IDFT process to obtain [s(m)]; or, the base station can obtain [s(m)] according to [X 8 (m)] and can also use other equivalent methods to achieve this.
  • the specific implementation process for the base station to obtain [s(m)] based on [X 8 (m)] is not limited to this.
  • the base station and the terminal equipment include corresponding hardware structures and/or software modules for performing each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.
  • the ⁇ is determined based on the M, including: the ⁇ is determined based on the M, the P and the E.
  • the processing module 1101 when generating the first signal according to the [k(m)], is used to: perform discrete Fourier transform on the M elements of the [k(m)] Process to obtain [X 2 (m)], which is composed of M elements; filter the [ X 2 ( m)] to obtain [X 4 (m)], where, The [X 4 (m)] is composed of M elements; the M elements of the [X 4 (m)] are mapped to M subcarriers to generate the first signal.
  • the first signal is a signal generated by mapping physical resources to [X 5 (q)]; or, the first signal is the [X 5 (q) ] The signal generated after filtering and mapping physical resources.
  • the P is determined based on the M, including: the P is determined based on the M and the E.
  • the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the P is an integer determined according to ( ⁇ M/4+E-1)/2 .
  • the processing module 1101 generates a first signal according to the [X 5 (q)], for mapping Q elements of the [X 5 (q)] to Q sub-elements. On the carrier, the first signal is generated.
  • the processing module 1101 when generating the first signal according to [X 8 (m)], is configured to: map M elements of [X 8 (m)] to M On subcarriers, the first signal is generated.
  • the transceiver module 1102 is used to receive a first signal, and the first signal is A signal generated based on [k(m)], which is based on the modulation symbol [s(m)] and the phase rotation factor Determined M symbols, where the [s(m)] consists of M elements, the It consists of M elements, where M is a positive integer, and elements in is e j ⁇ m , the ⁇ is determined based on the M, and the element k(m) in the [k(m)] is The m belongs to ⁇ 0,...,M-1 ⁇ .
  • the processing module 1101 is used to obtain the [s(m)] from the first signal.
  • the [s(m)] is the modulation obtained by demapping physical resources, equalization, decyclic expansion, inverse discrete Fourier transform and dephase rotation of the first signal. symbol; or, the [s(m)] is a modulation symbol obtained by demapping physical resources, equalization, inverse discrete Fourier transform and de-phase rotation of the first signal.
  • the first signal is a signal generated according to [k(m)], including: the first signal is a signal obtained by mapping physical resources to [X 1 (q)], Wherein, the [X 1 (q)] is composed of Q elements, the Q is the sum of the M and E, and the E is a positive integer; the [X 1 (q)] is [X 2 ( m)] Q symbols obtained through cyclic expansion, where the element X 1 (q) in [X 1 (q)] is X 2 ((q+MP)mod M), which is an element in [X 2 (m)], A mod B represents the remainder of A divided by B, the P is an integer greater than or equal to 0 and less than or equal to the E, the q belongs to ⁇ 0,... , Q-1 ⁇ ; the [X 2 (m)] is the M symbols obtained by the discrete Fourier transform of the [k (m)].
  • the first signal is a signal generated according to [k(m)], including: the first signal is a signal obtained by mapping physical resources to [X 3 (q)], Wherein, the [X 3 (q)] is composed of Q elements, the Q is the sum of the M and E, and the E is a positive integer; the [X 3 (q)] is [X 1 ( q)] Q symbols obtained by filtering; the [X 1 (q)] is the Q symbols obtained by [X 2 (m)] through cyclic expansion, wherein, in the [X 1 (q)] The element of X 1 (q) is X 2 ( (q+MP)mod M), which Taking the remainder of B, the P is an integer greater than or equal to 0 and less than or equal to the E, the q belongs to ⁇ 0,...,Q-1 ⁇ ; the [X 2 (m)] is the [k(m)] M symbols obtained by discrete Fourier transform.
  • the [X 3 (q)] is composed of Q elements, the Q is the sum of the M
  • the ⁇ is determined based on the M, including: the ⁇ is determined based on the M, the P and the E.
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and the ⁇ is ⁇ ( ⁇ M/4+E-2P-1)/M.
  • the first signal is a signal generated according to [k(m)], including: the first signal is a signal obtained by mapping physical resources to [X 2 (m)]; The [X 2 (m)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
  • the first signal is a signal generated according to [k(m)], including: the first signal is a signal obtained by mapping physical resources to [X 4 (m)];
  • the [X 4 (m)] is M symbols obtained by filtering [X 2 (m)], wherein the [X 4 (m)] is composed of M elements;
  • the [X 2 (m) )] are M symbols obtained by the discrete Fourier transform of [k(m)].
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and the ⁇ is ⁇ ( ⁇ M/4-1)/M.
  • the transceiver module 1102 is configured to receive a first signal, the first signal is a signal generated according to [X 5 (q)], and the [X 5 (q)] is a signal generated according to the modulation symbol [s( m)], where the [s(m)] consists of M elements, the M is a positive integer, the Q is the sum of the M and E, and the E is a positive integer , the element X 5 (q) in [X 5 (q)] is X 6 ((q+MP)mod M), and the X 6 ((q+MP)modM) is [X 6 (m)]
  • the elements in , the [X 6 (m)] is the M symbols obtained by performing discrete Fourier transform on the [s(m)], A mod B represents the remainder of A divided by B, and the P is Determined according to the M, the P is an integer greater than or equal to 0 and less than or equal to the E, the P is not equal to (EP), and the m belongs to ⁇ 0,
  • the [s(m)] is a modulation symbol obtained by demapping physical resources, equalization, decyclic expansion, and inverse discrete Fourier transform of the first signal.
  • the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the P is an integer determined according to ( ⁇ M/4+E-1)/2 .
  • the first signal is a signal generated according to [X 5 (q)], including: the first signal is obtained by mapping physical resources to [X 5 (q)] signal of.
  • the first signal is a signal generated according to [X 5 (q)], including: the first signal is a signal obtained by mapping physical resources to [X 7 (q)] ;
  • the [X 7 (q)] is Q symbols obtained by filtering the [X 5 (q)], where [X 7 (q)] includes Q elements.
  • the transceiver module 1102 is configured to receive a first signal, the first signal is a signal generated according to [X 8 (m)], and the [X 8 (m)] is generated according to the modulation symbol [s (m)], where the [s(m)] consists of M elements, the M is a positive integer, and the element X 8 (m) in the [X 8 (m)] for X 6 ((q+MP)mod M), the X 6 ((q+MP)mod M) is an element of [X 6 (m)], and the [X 6 (m)] is an element of the [ s(m)] M symbols obtained by discrete Fourier transform, A mod B represents the remainder of A divided by B, the P is determined based on the M, the P is a positive integer, and the m belongs ⁇ 0,...,M-1 ⁇ .
  • the processing module 1101 is used to obtain the [s(m)] from the first signal.
  • the [s(m)] is a modulation symbol obtained by demapping physical resources, equalization, decyclic shift, and inverse discrete Fourier transform of the first signal.
  • the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and the P is an integer determined according to ( ⁇ M/4-1)/2.
  • the first signal is a signal generated according to [X 8 (m)], including: the first signal is obtained by mapping physical resources to [X 8 (m)] signal of.
  • the first signal is a signal generated according to [X 8 (m)], including: the first signal is a signal obtained by mapping physical resources to [X 9 (m)] , the [X 9 (m)] is composed of M elements; the [X 9 (m)] is the M symbols obtained by filtering the [X 8 (m)].
  • communication device 1200 includes processor 1210 .
  • the communication device 1200 may also include a communication interface 1220 (indicated by a dotted line in Figure 12).
  • the processor 1210 and the communication interface 1220 are coupled to each other. It can be understood that the communication interface 1220 may be a transceiver or an input-output interface.
  • the communication device 1200 may also include a memory 1230 (indicated by a dotted line in FIG. 12 ) for storing instructions executed by the processor 1210 or input data required for the processor 1210 to run the instructions or after the processor 1210 executes the instructions. generated data.
  • the memory 1230, the processor 1210 and the communication interface 1220 are connected through a bus 1240.
  • instructions may also refer to computer programs, codes, program codes, programs, applications, software, or executable files.
  • the processor 1210 is used to implement the functions of the above-mentioned processing module 1101, and the communication interface 1220 is used to implement the functions of the above-mentioned transceiver module 1102.
  • the terminal device chip implements the functions of the terminal device in the above method embodiment.
  • the terminal equipment chip receives information from other modules (such as radio frequency modules or antennas) in the terminal equipment, and the information is sent by the network equipment to the terminal equipment; or, the terminal equipment chip sends information to other modules (such as radio frequency modules or antennas) in the terminal equipment.
  • Antenna sends information, which is sent by the terminal device to the network device.
  • the network device module When the above communication device is a module applied to a network device, the network device module implements the functions of the network device in the above method embodiment.
  • the network device module receives information from other modules in the network device (such as a radio frequency module or antenna), which is sent by the terminal device to the network device; or, the network device module sends information to other modules in the network device (such as a radio frequency module or antenna).
  • Antenna sends information, which is sent by the network device to the terminal device.
  • the network equipment module here can be the baseband chip of the network equipment, or it can be a DU or other module.
  • the DU here can be a DU under the open radio access network (open radio access network, O-RAN) architecture.
  • processor in the embodiments of the present application can be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit. (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory In memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in network equipment or terminal equipment. Of course, the processor and the storage medium can also exist as discrete components in network equipment or terminal equipment.
  • This application also provides a computer-readable storage medium that stores a computer program or instructions.
  • the steps executed by the network device or the terminal device in the foregoing method embodiments are implemented. method.
  • the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products.
  • the technical solution of the present application essentially or contributes to the technical solution or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes a number of instructions. So that a computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in various embodiments of this application.
  • Storage media include: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk and other media that can store program code.
  • the computer program product includes: computer program code.
  • the computer program code When the computer program code is run on a computer, it causes the computer to execute any of the foregoing method embodiments executed by a terminal device or a network device. Methods.
  • This application also provides a system, which includes a terminal device and a network device.
  • Embodiments of the present application also provide a processing device, including a processor and an interface; the processor is configured to execute the method executed by the terminal device or network device involved in any of the above method embodiments.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
  • the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media.
  • the available media may be magnetic media, such as floppy disks, hard disks, and tapes; optical media, such as digital video optical disks; or semiconductor media, such as solid-state hard drives.
  • the computer-readable storage medium may be volatile or nonvolatile storage media, or may include both volatile and nonvolatile types of storage media.
  • information information
  • signal signal
  • message messages
  • channel channel
  • “at least one” refers to one or more, and “plurality” refers to two or more.
  • “And/or” describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or” relationship; in the formula of this application, the character “/” indicates that the related objects before and after are a kind of “division” Relationship.
  • “Including at least one of A, B and C” may mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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

Abstract

Le procédé consiste plus précisément à : déterminer [k(m)] selon un symbole de modulation [s(m)] et un facteur de rotation de phase [φ(m)] ; et générer un premier signal selon [k(m)], et envoyer le premier signal, [s(m)] étant composé de M éléments, [φ(m)] étant composé de M éléments, [k(m)] étant composé de M éléments, l'élément φ(m) dans [φ(m)] équivalant à ejθm, θ étant déterminé selon M, et l'élément k(m) dans [k(m)] équivalant à φ(m)*s(m). Au moyen des modes de réalisation de la présente demande, un équipement terminal effectue, selon un facteur de rotation de phase, une rotation de phase sur un symbole de modulation d'informations à envoyer, de sorte qu'une différence de phase entre des formes d'onde correspondant à deux éléments adjacents dans [k(m)] après rotation de phase soit éloignée de 0 degré ou 180 degrés, réduisant ainsi un pic après que des formes d'onde qui correspondent à des symboles de modulation correspondant aux deux éléments adjacents sont superposées. Par conséquent, le PAPR d'un premier signal généré selon [k(m)] peut être réduit, et la plage de couverture du premier signal peut être améliorée.
PCT/CN2023/079331 2022-03-09 2023-03-02 Procédé et appareil de communication WO2023169302A1 (fr)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
US20190081839A1 (en) * 2016-05-11 2019-03-14 Huawei Technologies Co., Ltd. Signal transmission method, transmit end, and receive end
CN109995692A (zh) * 2017-12-30 2019-07-09 华为技术有限公司 发送数据的方法及装置
CN111200572A (zh) * 2018-11-19 2020-05-26 华为技术有限公司 数据传输方法和装置
WO2020143780A1 (fr) * 2019-01-10 2020-07-16 华为技术有限公司 Procédé et dispositif de traitement de signal
CN112399457A (zh) * 2019-08-16 2021-02-23 华为技术有限公司 信号传输方法和通信装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190081839A1 (en) * 2016-05-11 2019-03-14 Huawei Technologies Co., Ltd. Signal transmission method, transmit end, and receive end
CN109995692A (zh) * 2017-12-30 2019-07-09 华为技术有限公司 发送数据的方法及装置
CN111200572A (zh) * 2018-11-19 2020-05-26 华为技术有限公司 数据传输方法和装置
WO2020143780A1 (fr) * 2019-01-10 2020-07-16 华为技术有限公司 Procédé et dispositif de traitement de signal
CN112399457A (zh) * 2019-08-16 2021-02-23 华为技术有限公司 信号传输方法和通信装置

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