WO2023169302A1

WO2023169302A1 - Communication method and apparatus

Info

Publication number: WO2023169302A1
Application number: PCT/CN2023/079331
Authority: WO
Inventors: 龚名新; 曲秉玉
Original assignee: 华为技术有限公司
Priority date: 2022-03-09
Filing date: 2023-03-02
Publication date: 2023-09-14
Also published as: CN116781468A

Abstract

A communication method and apparatus The method specifically comprises: determining [k(m)] according to a modulation symbol [s(m)] and a phase rotation factor [φ(m)]; and generating a first signal according to [k(m)], and sending the first signal, wherein [s(m)] is composed of M elements, [φ(m)] is composed of M elements, [k(m)] is composed of M elements, the element φ(m) in [φ(m)] is ejθm, θ is determined according to M, and the element k(m) in [k(m)] is φ(m)*s(m). By means of the embodiments of the present application, a terminal device performs, according to a phase rotation factor, phase rotation on a modulation symbol of information to be sent, so that a phase difference between waveforms corresponding to two adjacent elements in [k(m)] after phase rotation is far away from 0 degree or 180 degrees, thereby reducing a peak after waveforms which correspond to modulation symbols corresponding to the two adjacent elements are superposed. Therefore, the PAPR of a first signal which is generated according to [k(m)] can be reduced, and the coverage range of the first signal can be improved.

Description

A communication method and device

Cross-references to related applications

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on March 9, 2022, with application number 202210222604.5 and application title "A communication method and device", the entire content of which is incorporated into this application by reference. middle.

Technical field

The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device.

Background technique

Orthogonal frequency division multiplexing (OFDM) systems can provide better transmission quality, higher data rates and spectral efficiency. However, since 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). Among them, PAPR refers to the ratio between the peak power and the average power of the signal.

Since the linear dynamic range of the power amplifier is limited, signals with high PAPR can easily enter the nonlinear region of the power amplifier, causing problems such as nonlinear distortion and in-band signal distortion after the signal passes through the power amplifier. Power backoff technology can prevent high PAPR signals from entering the nonlinear region of the power amplifier. However, the higher the PAPR of the signal, the greater the power that the signal needs to back off. The greater the backoff power of the signal, the smaller the coverage of the signal, thus reducing the coverage of the signal.

Compared with OFDM waveforms, the PAPR of discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) is relatively low, but it is still about 6dB. How to further reduce the PAPR of DFT-S-OFDM waveform is an urgent problem to be solved.

Contents of the invention

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:

According to the modulation symbol [s(m)] and the phase rotation factor Determine [k(m)]; and generate a first signal according to the [k(m)], and send the first signal. Among them, [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 ^jθm , θ is determined based on M, and the elements in [k(m)] are m belongs to {0,...,M-1}.

In the above embodiments of the present application, 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. .

In a possible implementation, the first signal may be a signal generated by [k(m)] in any of the following four ways.

Method 1: The first signal is a signal generated by [k(m)] after discrete Fourier transform, cyclic expansion and mapping of physical resources. Optionally, [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)], 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 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.

In the above-mentioned method 1, [k(m)] generates a transmissible first signal through DFT, cyclic expansion and mapping of physical resources, so that information can be sent. In addition, 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.

Method 2: The first signal is a signal generated by [k(m)] after discrete Fourier transform, cyclic expansion, filtering and mapping of physical resources. Optionally, [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), the is an element in [X ₂ (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 the first signal by mapping physical resources. Furthermore, 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).

In the above-mentioned method 2, [k(m)] can generate a transmittable first signal after undergoing DFT, cyclic expansion, filtering and mapping physical resources, so that information can be sent. In addition, 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. Corresponding to the peak value after superposition of the waveforms, the PAPR of the first signal can be reduced.

Method 3: The first signal is a signal generated by [k(m)] after discrete Fourier transform and mapping of physical resources. Optionally, [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.

In the above-mentioned method three, after [k(m)] undergoes DFT and mapping physical resources, a transmissible first signal can be generated, so that information can be sent. In addition, the process of generating the first signal from [k(m)] does not require cyclic expansion processing and filtering processing, which can simplify the generation process of the first signal.

Method 4: The first signal is a signal generated by [k(m)] after discrete Fourier transform, filtering and mapping of physical resources. Optionally, [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. Alternatively, 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.

In the above-mentioned method 4, [k(m)] can be generated after DFT, filtering and mapping of physical resources. A signal, so that information can be sent. In addition, the filtering process therein can further reduce the PAPR of the first signal.

In another possible implementation, 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.

Alternatively, 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. Alternatively, 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) .

Alternatively, generating the first signal based on [k(m)] may also be: performing discrete Fourier transform processing on the M elements of [k(m)] to obtain [X ₂ (m)], [X ₂ ( m)] consists of M elements; map the M elements of [X ₂ (m)] to M subcarriers to generate the first signal.

Alternatively, 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. Optionally, 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).

In the above implementation, 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.

In a possible implementation, θ is determined based on M, which can be: the θ is determined based on M, P and E.

In the above implementation, 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. Relatedly, [s(m)] can be phase-rotated adaptively to reduce the PAPR of the first signal.

In a possible implementation, the modulation method of [s(m)] is four-phase phase shift keying QPSK, and θ is π(±M/4+E-2P-1)/M; or, θ is close to π (±M/4+E-2P-1)/M.

In another possible implementation, the modulation method of [s(m)] is four-phase phase shift keying QPSK, and θ is π(±M/4-1)/M; or, θ is close to π(±M /4-1)/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:

According to the modulation symbol [s(m)], [X ₅ (q)] is determined; and a first signal is generated according to the [X ₅ (q)], and the first signal is sent. Among them, [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}.

In the above embodiment of the present application, 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.

In a possible implementation, P is determined based on M, which can be: P is determined based on M and E.

In the above implementation, _the number of elements that need to be extended before the first element of [X ₆ (m)] is not only related to the number of subcarriers required for [X ₆ (m)], but also to the )] is related to the number of subcarriers expanded during cyclic expansion.

In a possible implementation, 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.

In a possible implementation, the first signal may be a signal generated by [X ₅ (q)] in the following manner:

The first signal is the signal generated by [X ₅ (q)] after mapping physical resources;

Alternatively, the first signal is a signal generated after [X ₅ (q)] is filtered and mapped to physical resources. Optionally, [X ₅ (q)] is filtered to obtain [X ₇ (q)], which consists of Q elements; [ _{X 7} ₍ q)] is obtained by mapping physical resources. A signal. Optionally, 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).

In another possible implementation, generating the first signal according to [X ₅ (q)] may be: mapping Q elements of [X ₅ (q)] to Q subcarriers to generate the first signal.

Or, generating the first signal based on [X ₅ (q)] can be: filtering [X ₅ (q)] to obtain [X ₇ (q)], [X ₇ (q)] is composed of Q elements; And, map Q elements of [X ₇ (q)] to Q subcarriers to generate the first signal. Alternatively, 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).

In the above implementation manner, the terminal device can use multiple methods to generate a transmissible first signal according to [X ₅ (q)], 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.

In the third aspect, a communication method is provided, 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. , for example, the chip system or other functional modules are installed in the terminal device. The method includes:

According to the modulation symbol [s(m)], [X ₈ (m)] is determined; and a first signal is generated according to the [X ₈ (m)], and the first signal is sent. Among them, [s(m)] consists of M elements, M is a positive integer, [X ₈ (m)] consists of M elements, among which, the element X ₈ (m) in [X ₈ (m)] _{is X 6} ₍ ₍ m+MP ₎ mod M), which )] M symbols obtained by performing discrete Fourier transform, 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 {0,...,M-1}.

In the above embodiments of the present application, 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.

In a possible implementation, the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and P is an integer determined based on (±M/4-1)/2.

In a possible implementation, the first signal may be a signal generated by [X ₈ (m)] in the following manner:

The first signal is the signal generated by [X ₈ (m)] after mapping physical resources;

Alternatively, the first signal is a signal generated after [X ₈ (m)] is filtered and mapped to physical resources. Optionally, [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. Optionally, 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).

In another possible implementation, generating the first signal according to [X ₈ (m)] may be: mapping M elements of [X ₈ (m)] to M subcarriers to generate the first signal.

Alternatively, 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. Optionally, 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).

In the above implementation, 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, For example, 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. Wherein, 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 ^jθm , θ is determined based on M, and the element k(m) in [k(m)] is m belongs to {0,...,M-1}.

In a possible implementation, [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;

Alternatively, [s(m)] is the modulation symbol obtained by demapping physical resources, equalization, inverse discrete Fourier transform and de-phase rotation of the first signal.

In a possible implementation, 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.

Alternatively, 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)]. Optionally, the element X ₃ (q) in the X ₃ (q)] is X ₁ (q) × w ₁ (q), and w ₁ (q) is w ₁ (Q-1-q).

Alternatively, 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.

Or, 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. Alternatively, 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).

In a possible implementation, θ is determined based on M, which can be: θ is determined based on M, P and E.

In a possible implementation, the modulation method of [s(m)] is four-phase phase shift keying QPSK, θ is π(±M/4+E-2P-1)/M, or θ is close to π( ±M/4+E-2P-1)/M.

In another possible implementation, the modulation method of [s(m)] is four-phase phase shift keying QPSK, θ is π(±M/4-1)/M, or θ is π(±M /4-1)/M.

In the fifth aspect, a communication method is provided, 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, For example, 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. Wherein, 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)] is the modulation symbol obtained by demapping physical resources, equalization, decyclic expansion, and inverse discrete Fourier transform of the first signal.

In a possible implementation, P is determined based on M, including: P is determined based on M and E.

In a possible implementation manner, 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)].

Alternatively, 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. Alternatively, 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).

In the sixth aspect, a communication method is provided, 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, For example, 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. Wherein, 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)] is the modulation symbol obtained by demapping physical resources, equalization, decyclic shift, and inverse discrete Fourier transform of the first signal.

In a possible implementation manner, the first signal is a signal generated according to [X ₈ (m)], which may be: the first signal is a signal obtained by mapping physical resources to [X ₈ (m)].

Alternatively, 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)]. Alternatively, 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).

In a seventh aspect, a communication device is provided. The communication device is configured to perform the method described in the above first to third aspects and any one of their possible implementations. The communication device is, for example, a terminal device, or a functional module in the terminal device, such as a baseband device or a chip system. In a possible implementation, the communication device includes a baseband device and a radio frequency device. In another possible implementation, the communication device includes a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). The transceiver module can realize the sending function and the receiving function. When the transceiver module realizes the sending function, it can be called the sending module (sometimes also called the sending unit). When the transceiver module realizes the receiving function, it can be called the receiving module (sometimes also called the sending unit). receiving unit). The sending module and the receiving module can be the same functional module, which is called the sending and receiving module, and this functional module can realize the sending function and the receiving function; or the sending module and the receiving module can be different functional modules, and the sending and receiving module is a pair of The collective name for these functional modules.

In an eighth aspect, a communication device is provided. The communication device is 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. In a possible implementation, the communication device includes a baseband device and a radio frequency device. In another possible implementation, the communication device includes a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). Regarding the implementation of the transceiver module, please refer to the introduction in the seventh aspect.

In a ninth aspect, a communication device is provided. The communications device may include one or more processors. Optionally, the communication device may also include a memory. Wherein, 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 .

In a tenth aspect, a communication device is provided. The communications device may include one or more processors. Optionally, the communication device may also include a memory. Wherein, 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 .

In an eleventh aspect, a communication system is provided. The communication system includes the communication device described in the seventh aspect, and/or the communication device described in the eighth aspect.

In a twelfth 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.

For the technical effects that can be achieved by the above-mentioned fourth aspect to thirteenth aspect and any of their possible implementation methods, please refer to the technical effects that can be achieved by the above-mentioned first to third aspects and any of their possible implementation methods. , which will not be repeated here.

Description of the drawings

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;

Figure 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;

Figure 11 is a schematic diagram of a communication device provided by an embodiment of the present application;

Figure 12 is another schematic diagram of a communication device provided by an embodiment of the present application.

Detailed ways

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.

Figure 1 is a schematic architectural diagram of a communication system applied in an embodiment of the present application. As shown in Figure 1, the communication system 1000 includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The wireless access network 100 may include at least one network device, such as 110a and 110b in Figure 1, and may also include at least one terminal device, such as 120a-120j in Figure 1. Among them, 110a is a base station, 110b is a micro station, 120a, 120e, 120f and 120j are mobile phones, 120b is a car, 120c is a gas pump, and 120d is a home access point (HAP) arranged indoors or outdoors. 120g is a laptop, 120h is a printer, and 120i is a drone. That , the same terminal device or network device can provide different functions in different application scenarios. For example, 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. For direct communication, 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.

Network equipment is a network-side device with wireless transceiver functions. The network equipment can be a device in the radio access network (RAN) that provides wireless communication functions for terminal equipment, which is called RAN equipment. For example, the wireless access network equipment may be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (TRP), a fifth generation (5th generation, 5G) mobile communication system The next generation base station (next generation NodeB, gNB), the base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also be completed Modules or units with some functions of the base station, for example, can be a centralized unit (CU) or a distributed unit (DU). The CU here completes the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also complete the functions of the service data adaptation protocol (SDAP); DU completes the functions of the base station The functions of the wireless link control layer and medium access control (MAC) layer can also complete some or all of the physical layer functions. For specific descriptions of each of the above protocol layers, please refer to the Third Generation Partner Program (3rd generation partnership project, 3GPP) related technical specifications. The network device may be a macro base station (110a in Figure 1), a micro base station or an indoor station (110b in Figure 1), or a relay node or a donor node, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.

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. In the embodiment of the present application, the device used to realize the function of the terminal device may be a terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system or a combined device or component that can realize the function of the terminal device. The device Can be installed in terminal equipment. The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.

Network equipment and terminal equipment can be fixed-location or removable. Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky. The embodiments of this application do not limit the application scenarios of network devices and terminal devices.

The roles of network equipment and terminal equipment may be relative. For example, the helicopter or drone 120i in Figure 1 may be configured as a mobile network equipment, for those terminal equipment 120j that accesses the wireless access network 100 through 120i. , the terminal device 120i is a network device; but for the network device 110a, 120i is a terminal device, that is, communication between 110a and 120i is through a wireless air interface protocol. Of course, communication between 110a and 120i may also be carried out through an interface protocol between network devices. In this case, relative to 110a, 120i is also a network device. therefore, Both network equipment and terminal equipment can be collectively called communication devices. 110a and 110b in Figure 1 can be called communication devices with network equipment functions, and 120a-120j in Figure 1 can be called communication devices with terminal equipment functions.

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.

In the embodiments of the present application, the functions of the network device may also be executed by modules (such as chips) in the network device, or may be executed by a control subsystem that includes the functions of the network device. The control subsystem here that includes network equipment functions can be the control center in the above application scenarios such as smart grid, industrial control, smart transportation, smart city, etc. The functions of the terminal equipment can also be performed by modules in the terminal equipment (such as chips or modems), or can be performed by devices containing the functions of the terminal equipment.

In this application, 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. In order to communicate with the network device, 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. When the terminal equipment communicates with the serving cell, it will also be interfered by signals from neighboring cells.

The signal sending device involved in this application may be the network equipment in Figure 1, and the signal receiving device may be the terminal equipment in Figure 1; or, the signal sending device involved in this application may be the terminal equipment in Figure 1, and the signal receiving device may It is the terminal equipment in Figure 1; or, the signal sending device and the signal receiving device involved in this application are both the terminal equipment or network equipment in Figure 1. For ease of understanding, the following description takes the signal transmitting device as a terminal device and the signal receiving device as a base station as an example.

In the embodiment of the present application, the modulation method of the modulation symbol may be quadrature phase shift keying (QPSK), binary phase shift keying (BPSK), or Offset phase shift keying (offset phase shift keying, OQPSK), etc. If there is no special explanation, in the embodiment of this application, the modulation mode of the modulation symbol is QPSK as an example.

The communication system applicable to the embodiments of this application has been introduced previously. In order to facilitate understanding by those skilled in the art, the technical features involved in the embodiments of the present application will be explained below.

In the current communication process, the terminal device can generate a transmission signal based on the information to be transmitted, and send the transmission signal to the base station through the antenna. The transmission signal may be a signal generated after the information to be transmitted is modulated, discrete Fourier transform (DFT), and mapped to physical resources. However, the generation process of the signal to be sent in the embodiment of the present application is not limited to this. For example, the signal to be sent may also be a signal generated after the information to be sent is modulated, DFT, filtered, and mapped to physical resources.

It should be noted that mapping physical resources and generating signals, or mapping frequency domain sequences to subcarriers and generating signals, can be understood as the process from the frequency domain sequence corresponding to the information to be sent to obtaining a transmittable analog signal. This process can specifically include mapping the frequency domain sequence to subcarriers and obtaining the time domain sequence through inverse fast fourier transformation (IFFT). The time domain sequence is added with a cyclic prefix (CP) and then Digital-to-analog conversion results in a transmissible analog signal. It should be understood that the embodiments of the present application are not limited to this for mapping physical resources. For example, the frequency domain sequence can also be multiplied by the precoding matrix first, and then mapped to subcarriers and subjected to IFFT to obtain the time domain sequence. The sending end may also use other equivalent methods to generate signals, which is not limited in the embodiments of this application.

Figure 2 shows a schematic diagram of the signal transmission process of DFT-s-OFDM waveform. Taking QPSK modulation as an example, the signal transmission process may specifically include the following contents.

S21: The terminal device performs QPSK modulation on 2M bits of information to be sent, and obtains M modulation symbols. M is a positive integer. QPSK modulation uses four different phases to represent different information. One QPSK modulation symbol can carry 2 bits of information. The four phases of QPSK can be [0, π/2, π, 3π/2] or [π/4, 3π/4, 5π/4, 7π/4].

S22: The terminal equipment performs M-point DFT on M modulation symbols to obtain the frequency domain sequence [X(0),...,X(M-1)].

S23: 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. Optionally, when the terminal device sends the information to be sent through multiple antennas, 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.

S25: The terminal device sends the analog signal to the base station through the antenna. Correspondingly, the base station receives the analog signal.

At this point, the terminal device has completed sending the signal.

When the phases of the waveforms corresponding to each modulation symbol at a certain time domain sampling point are the same or similar, the superimposed signal of multiple modulation symbols will produce a larger instantaneous peak power, and thus a higher PAPR. Since the linear dynamic range of the power amplifier is limited, signals with high PAPR can easily enter the nonlinear region of the power amplifier, causing problems such as nonlinear distortion and in-band signal distortion after the signal passes through the power amplifier. The embodiments of the present application will be introduced below with reference to the accompanying drawings. In order to prevent high PAPR signals from entering the nonlinear region of the power amplifier, terminal equipment can use power backoff technology to roll back the power of the signal so that the signal is far away from the nonlinear region of the power amplifier. However, the higher the PAPR of the signal, the greater the power that the signal needs to back off. The greater the backoff power of the signal, the smaller the coverage of the signal, thereby reducing the coverage of the signal.

In view of this, embodiments of the present application provide a communication method and device to reduce the PAPR of a signal and improve the coverage of the signal.

Figure 3 is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 3, this process may include the following content.

S301: The terminal device determines [k(m)] based on the modulation symbol and phase rotation factor.

The modulation symbols are denoted as [s(m)]. Where [s(m)] includes M modulation symbols. Alternatively, the modulation symbol is denoted as s(m), which is a modulation symbol. For ease of understanding, the embodiment of the present application is described by taking the modulation symbol denoted as [s(m)] as an example. [s(m)] may also be called a modulation symbol sequence, a modulation symbol stream, a modulation symbol string or a modulation symbol set, etc., and the embodiments of the present application are not limited thereto. [s(m)] consists of M elements, M is a positive integer. m belongs to {0,...,M-1}, that is, m∈{0,...,M-1}. The "..." in [0,...,M-1] represents a positive integer between 0 and (M-1). For example, when M=5, m∈{0, 1, 2, 3, 4 }. Correspondingly, the M elements of [s(m)] can be respectively: s(0),..., s(M-1). The [s(m)] are M modulation symbols obtained by modulating the first information, and the M modulation symbols correspond to the M elements in [s(m)] one-to-one. For example, the terminal device can modulate the first information to obtain [s(m)], and the modulation method is not limited to QPSK, BPSK, π/2-BPSK or OQPSK. The first information is the information to be sent by the terminal device. The first information can be, for example, picture data, Video data, text or message, etc. The embodiments of this application do not limit the specific implementation form of the first information.

The phase rotation factor is recorded as in, Includes M phase rotation factors. Alternatively, the phase rotation factor is written as That is a phase rotation factor. For ease of understanding, in the embodiment of the present application, 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 ^jθm , that is

As an example, the value of θ is related to M. As another example, when the frequency domain sequence corresponding to the first information needs to be cyclically expanded, the value of θ is related to M, E and P. Wherein, E is a positive integer, which is the number of elements that need to be expanded during cyclic expansion of the frequency domain sequence corresponding to the first information. P is an integer greater than or equal to 0 and less than or equal to E, and is the number of elements that need to be expanded before the first element of the frequency domain sequence when the frequency domain sequence corresponding to the first information is cyclically expanded. The value of P may be predefined, for example, a fixed positive integer; or, the value of P may be related to E, for example, P and E are directly proportional to each other, such as P=E/2, which is not limited to the embodiments of this application. Here it is.

The value of θ is related to M, which can be understood as θ is determined based on M. For example, the modulation mode of [s(m)] is QPSK, and the θ can be π(±M/4-1)/M, or the value of θ can be close to π(±M/4-1)/M. For another example, the modulation mode of [s(m)] is BPSK, and the θ can be π(±M/2-1)/M, or the value of θ can be close to π(±M/2-1)/M. For another example, the modulation mode of [s(m)] is π/2-BPSK, and the θ can be -π/M, or the value of θ can be close to -π/M.

The value of θ is related to M, E and P. It can be understood that θ is determined based on M, E and P. For example, the modulation mode of [s(m)] is QPSK, and the θ can be π(±M/4+E-2P-1)/M, or the value of θ can be close to For another example, the modulation mode of [s(m)] is BPSK, and the θ can be π(±M/2+E-2P-1)/M, or the value of θ can be close to π(±M/2+E- 2P-1)/M. For another example, the modulation method of [s(m)] is π/2-BPSK, and the θ can be π(E-2P-1)/M, or the value of θ can be close to π(E-2P-1)/M .

In this embodiment, the frequency domain sequence corresponding to the first information can be recorded as [X ₂ (m)]. The [X ₂ (m)] consists of M elements, which are M symbols obtained by performing DFT on [k (m)]. The M symbols correspond to the M elements in [X ₂ (m)] one-to-one. . The M elements of [X ₂ (m)] can be respectively: X ₂ (0),..., X ₂ (M-1). This [X ₂ (m)] can also be called a frequency domain signal, sequence, symbol stream, symbol string or symbol set, etc. The name of [X ₂ (m)] is not limited to this in the embodiment of the present application. It should be noted that DFT can be implemented through fast fourier transformation (FFT), which means that DFT can be replaced by FFT in the embodiment of the present application, and FFT can also be replaced by DFT in the corresponding embodiment of the present application.

Cyclic expansion of frequency domain sequences can also be called frequency domain extension (spectral extension). In the embodiment of this application, cyclic expansion of frequency domain sequences is simply called cyclic expansion. For example, [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.

Among them, Q is the sum of M and E, that is, Q=M+E. q belongs to {0,...,Q-1}, that is, q∈{0,...,Q-1}. The "..." in [0,...,Q-1] represents a positive integer between 0 and (Q-1). For example, when Q=7, q∈{0, 1, 2, 3, 4 ,5,6}. Correspondingly, the Q elements of [X ₁ (q)] can be respectively: X ₁ (0),..., X ₁ (Q-1). The element X ₁ (q) in [X ₁ (q)] is X ₂ ((q+MP)mod M). Where X ₂ ((q+MP)mod M) is the element in [X ₂ (m)], and A mod B represents the remainder of A divided by B. In Figure 4a, taking M=4, E=2, P=1 as an example, the frequency domain sequence before cyclic expansion, that is, [X ₂ (m)], is given by X ₂ (0), X ₂ (1), X ₂ (2), and X ₂ (3); the frequency domain sequence after cyclic expansion, namely [X ₁ (q)], consists of X ₂ (3), _X ₂ (0), X ₂ (2), X ₂ (3), and X ₂ (0).

It should be noted that the value of θ is related to M, which can be understood as the number of elements contained in [s(m)], or as the number of elements mapped by [X ₂ (m)] when it is mapped to a subcarrier. The number of subcarriers, but the embodiment of the present application is not limited to this. Similarly, E can be understood as the number of elements that need to be expanded during [X ₂ (m)] cyclic expansion, or as the number of subcarriers mapped by the expanded elements during [X ₂ (m)] cyclic expansion. However, the embodiments of the present application are not limited to this.

As an example, 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 resource blocks (RBs). The E may be predefined, for example, a fixed positive integer; or the value of E may be related to M, for example, E may be directly proportional to M, such as E=M/4. The embodiment of the present application is not limited to this. .

The terminal equipment is based on [s(m)] and Determine [k(m)], where [k(m)] may be called a sequence, symbol stream, symbol string or symbol set, etc. The expression of [k(m)] in the embodiment of the present application is not limited to this. The [k(m)] consists of M elements. The M elements of [k(m)] can be respectively: k(0),...,k(M-1). The element k(m) in [k(m)] can be the element s(m) in [s(m)] with elements in The product between them, that is, the element k(m) in [k(m)] is In Figure 4b, taking M=4 as an example, k(0) is k(1) is k(2) is k(3) is

It should be understood that in S301, the terminal equipment is based on [s(m)] and Determining [k(m)] can also be expressed as the terminal device based on s(m) and Determine k(m).

In S301, the terminal device determines [k(m)] based on the modulation symbol and phase rotation factor, which can make the phase difference of the waveform corresponding to two adjacent elements in [k(m)] far away from 0 degrees or 180 degrees, so that The instantaneous peak power of subsequent superimposed signals can be reduced, thereby reducing the PAPR of the first signal and improving the PAPR coverage of the first signal.

S302: The terminal device generates the first signal according to [k(m)].

For example, the first signal may be a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH), or a reference signal, etc. The embodiments of this application are specific to the first signal. The implementation form is not limited to this. The reference signal is, for example, a sounding reference signal (SRS), or a demodulation reference signal (demodulation reference signal, DMRS), etc., which are not limited in the embodiments of the present application.

In S302, the first signal may be [k(m)] generated in the following manner.

Method 1: The first signal is a signal generated by [k(m)] after DFT, cyclic expansion and mapping of physical resources. Among them, [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. Among them, please refer to the relevant content of S301 for specific descriptions of [X ₂ (m)], [X ₁ (q)] and mapped physical resources, which will not be described again here.

In this case, in S302, the terminal device can obtain [X ₁ (q)] according to [k (m)], map the Q elements of [X ₁ (q)] to Q subcarriers, and generate The first signal.

Among them, the terminal device obtains [X ₁ (q)] based on [k (m)], which can be understood as the terminal device performs DFT processing on [k (m)] to obtain [X ₂ (m)], and then [X ₂ ( m)] performs cyclic expansion to obtain [X ₁ (q)]; or the terminal device obtains [X ₁ (q)] based on [k(m)], which can also be understood as the terminal device performing DFT on [k(m)] processing, and perform cyclic expansion during DFT processing to obtain [X ₁ (q)]; or, the terminal device obtains [X ₁ (q)] based on [k(m)], which can also be achieved through other equivalent methods. The specific implementation process of the terminal device obtaining [X ₁ (q)] based on [k(m)] in the application embodiment is not limited to this.

The terminal equipment maps Q elements of [X ₁ (q)] to Q subcarriers, and the process of generating the first signal is specific. It can include: the terminal device maps Q elements of [X ₁ (q)] to Q subcarriers, and performs 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. For the specific implementation of this process, please refer to the relevant descriptions of S23 and S24. It should be understood that the specific implementation of this process can also be implemented in other equivalent ways, and the embodiments of the present application are not limited thereto. For example, the terminal device can multiply [X ₁ (q)] by the precoding matrix, and then map it to Q subcarriers after multiplication. The Q subcarriers may be continuous Q subcarriers or equally spaced Q subcarriers, which is not limited in the embodiment of the present application.

In the above-mentioned method 1, [k(m)] generates a transmittable first signal through DFT, cyclic expansion and mapping of physical resources, thereby enabling the transmission of the first information. In addition, 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.

Method 2: The first signal is a signal generated by [k(m)] after DFT, cyclic expansion, filtering and mapping of physical resources. Among them, [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 filtered After processing, [X ₃ (q)] is obtained; the [X ₃ (q)] is mapped to the physical resource to obtain the first signal, as shown in Figure 5b.

Where [X ₃ (q)] consists of Q elements. The Q elements of [X ₃ (q)] can be respectively: X ₃ (0),..., X ₃ (Q-1). This [X ₃ (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 ₃ (q)]. The element X ₃ (q) in [X ₃ (q)] is the product of the element X ₁ (q) in [X ₁ (q)] and the filter coefficient w ₁ (q), that is, X ₃ (q ) is X ₁ (q)×w ₁ (q). In Figure 4c, taking Q=6 as an example, X ₃ (0) is X ₁ (0) × w ₁ (0), X ₃ (1) is X ₁ (1) × w ₁ (1), X ₃ (2) is X ₁ (2) × w ₁ (2), X ₃ (3) is X ₁ (3) × w ₁ (3), X ₃ (4) is X ₁ (4) × w ₁ (4), X ₃ (5) is X ₁ (5)×w ₁ (5). In addition, for detailed descriptions of [X ₂ (m)], [X ₁ (q)] and mapped physical resources, please refer to the relevant content of S301, which will not be described again here.

The w ₁ (q) is an element in [w ₁ (q)]. [w ₁ (q)] consists of Q elements, which correspond to Q filter coefficients one-to-one. The Q elements of [w ₁ (q)] can be respectively: w ₁ (0),..., w ₁ (Q-1). [w ₁ (q)] may be predefined, but the embodiment of the present application is not limited thereto.

Optionally, the Q elements in [w ₁ (q)] are symmetrically equal, that is, w ₁ (q) is w ₁ (Q-1-q). For example, Q=6, then w ₁ (0)=w ₁ (5), w ₁ (1)=w ₁ (4), w ₁ (2)=w ₁ (3). Correspondingly, [X ₃ (q)] is Q symbols obtained by [X ₁ (q)] through symmetric filtering. By performing symmetric filtering on [X ₁ (q)], the PAPR of the subsequently generated first signal can be reduced.

In this case, in S302, 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.

Among them, the specific implementation process of the terminal device obtaining [X ₁ (q)] according to [k(m)] can refer to the relevant description of the above-mentioned method 1, which will not be described again here. The terminal device filters [X ₁ (q)] to obtain [X ₃ (q)], which can be understood as the terminal device combines the element X ₁ (q) in [X ₁ (q)] with the filter coefficient w ₁ (q ) are multiplied to obtain [X ₃ (q)] composed of Q elements. Of course, the terminal device can also obtain [X ₃ (q)] in other equivalent ways, and the embodiment of the present application is not limited thereto.

The terminal device maps Q elements of [X ₃ (q)] to Q subcarriers. The process of generating the first signal may specifically include: the terminal device maps Q elements of [X ₃ (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)] 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. It should be reasonable The solution is that the terminal equipment maps Q elements of [X ₃ (q)] to Q subcarriers, and the specific implementation of generating the first signal can also be implemented through other equivalent methods, 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.

In the above-mentioned method 2, after [k(m)] undergoes DFT, cyclic expansion, filtering and mapping of physical resources, a transmissible first signal can be generated, thereby enabling the transmission of the first information. In addition, 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. Corresponding to the peak value after superposition of the waveforms, the PAPR of the first signal can be reduced.

Method 3: The first signal is the signal generated by [k(m)] after DFT and mapping of physical resources. Among them, [k(m)] is processed by DFT to obtain [X ₂ (m)]; the [X ₂ (m)] is mapped to the physical resource to obtain the first signal, as shown in Figure 5c. [X ₂ (m)] and the specific description of the mapped physical resources, please refer to the relevant content of S301, which will not be repeated here.

In this case, in S302, the terminal device can perform DFT processing on [k(m)] to obtain [X ₂ (m)], and map [X ₂ (m)] to the M subcarriers to generate the A signal.

Among them, the terminal device maps M elements of [X ₂ (m)] to M subcarriers. The process of generating the first signal may specifically include: the terminal device maps M elements of [X ₂ (m)]. to M 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; for details, please refer to the specific implementation processes of S23 and S24. It should be understood that the terminal equipment maps M elements of [X ₂ (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.

In the above-mentioned method 3, after [k(m)] undergoes DFT and mapping of physical resources, a transmissible first signal can be generated, thereby enabling the transmission of the first information. In addition, the process of generating the first signal from [k(m)] does not require cyclic expansion processing and filtering processing, which can simplify the generation process of the first signal.

Method 4: The first signal is a signal generated by [k(m)] after DFT, filtering and mapping of physical resources. Among them, [k(m)] is processed by DFT to obtain [X ₂ (m)]; the [X ₂ (m)] is processed by filtering to obtain [X ₄ (m)]; the [X ₄ (m)] is mapped The physical resource gets the first signal, as shown in Figure 5d.

Where [X ₄ (m)] consists of M elements. The M elements of [X ₄ (m)] can be respectively: X ₄ (0),..., X ₄ (M-1). This [X ₄ (m)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set. The name of [X ₄ (m)] in the embodiment of the present application is not limited to this. The element X ₄ (m) in [X ₄ (m)] is the product of the element X ₂ (m) in [X ₂ (m)] and the filter coefficient w ₂ (m), that is, [X The element X ₄ (m) in ₄ (m)] is X ₂ (m)×w ₂ (m). Taking M=4 as an example, X ₄ (0) is X ₂ (0) × w ₂ (0), X ₄ (1) is X ₂ (1) × w ₂ (1), and X ₄ (2) is X ₂ (2)×w ₂ (2), X ₄ (3) is X ₂ (3)×w ₂ (3). In addition, 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.

Optionally, the M elements in [w ₂ (m)] are symmetrically equal, that is, w ₂ (m) is w ₂ (M-1-m). For example, M=4, then w ₂ (0)=w ₂ (3), w ₂ (1)=w ₂ (2). Correspondingly, the [X ₄ (m)] is the symmetrically filtered version of [X ₂ (m)] Processing results in M symbols. By performing symmetric filtering on [X ₂ (m)], the PAPR of the subsequently generated first signal can be reduced.

In this case, in S302, the terminal device can perform DFT processing on [k(m)] to obtain [X ₂ (m)], and filter [X ₂ (m)] to obtain [X ₄ (m) ], and map M elements in [X ₄ (m)] to M subcarriers to generate the first signal.

Among them, the terminal device filters [X ₂ (m)] to obtain [X ₄ (m)], which can be understood as the terminal device combines the element X ₂ (m) in [X ₂ (m)] with the filter coefficient w ₂ (m) are multiplied together to obtain [X ₄ (m)] composed of M elements. Of course, the terminal device can also obtain [X ₄ (m)] in other equivalent ways. The embodiment of the present application is not limited to this. .

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. It should be understood that 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.

In the above-mentioned method 4, after [k(m)] undergoes DFT, filtering and mapping of physical resources, a transmissible first signal can be generated, thereby enabling the transmission of the first information. In addition, the filtering process therein can further reduce the PAPR of the first signal.

It should be noted that the filtering involved in the embodiments of the present application may be implemented by the above frequency domain filtering method, or may be implemented by other equivalent methods, such as filtering in the time domain, and the embodiments of the present application are not limited thereto.

It should be noted that the subcarrier mapping involved in the embodiments of this application can be mapped to continuous subcarriers or to equally spaced consecutive subcarriers. For example, if the subcarriers are numbered 0, 1, 2,..., N in ascending order of frequency resources, they can be mapped to subcarriers with consecutive numbers, such as 0, 1, 2,..., or numbered in an arithmetic sequence. on subcarriers, such as 0, 2, 4,….

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.

S303: The terminal device sends the first signal to the base station. Correspondingly, the base station receives the first signal.

For example, the terminal device sends the first signal to the base station through an antenna. Correspondingly, the base station receives the first signal through the antenna.

S304: The base station obtains [s(m)] from the first signal.

In S304, 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)].

As an example, [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. Among them, 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)]. Furthermore, [k(m)] is dephased and rotated to obtain [s(m)]. Among them, for the specific description of [X ₁ (q)], [X ₂ (m)] and [k (m)], please refer to the relevant content of S301 and will not be repeated here.

Among them, 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. In addition, in this embodiment, 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. For example, 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.

Decyclic expansion refers to the reverse process of cyclic expansion, which can be understood as obtaining the frequency domain sequence before expansion based on the expanded frequency domain sequence, that is, the frequency domain sequence corresponding to the information to be received. For example, a weighted average of the expanded elements and the original elements. It should be noted that the decyclic expansion can also be achieved through equalization, which is not limited in the embodiments of this application.

De-phase rotation refers to the terminal equipment according to [s(m)] and Determine the inverse process of [k(m)]. This dephase rotation can be understood as the base station according to [k(m)] and Determine [s(m)]. For example, the element s(m) in [k(m)] can be in, For detailed description, please refer to the relevant content of S301 and will not be repeated here.

In this case, in S304, the base station can obtain [X ₁ (q)] based on the first signal, obtain [k(m)] based on [X ₁ (q)], and then obtain [[k(m)] based on [k(m)] s(m)].

Among them, 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. It should be understood that 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.

The base station obtains [k(m)] based on [X ₁ (q)], which can be understood as the base station performs decyclic expansion processing on [X ₁ (q)] to obtain [X ₂ (m)], and then [X ₂ (m) )] to perform IDFT processing to obtain [k(m)]; or, the base station obtains [k(m)] based on [X ₁ (q)], which can also be understood as the base station performs IDFT processing on [X ₁ (q)], and During the IDFT process, decyclic expansion is performed to obtain [k(m)]; or, the base station obtains [k(m)] according to [X ₁ (q)], which can also be implemented in other equivalent ways. The specific implementation process of obtaining [k(m)] based on [X ₁ (q)] is not limited to this.

The base station obtains [s(m)] based on [k(m)], which can be understood as the base station obtains [s(m)] based on [k(m)] and Get [s(m)]. For example, the element s(m) in [s(m)] can satisfy

As another example, [k(m)] is the first signal obtained after demapping physical resources, equalization and IDFT M symbols, as shown in Figure 6b. Among them, 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)]. Furthermore, [k(m)] is dephased and rotated to obtain [s(m)]. Among them, for the specific description of [X ₂ (m)] and [k (m)], please refer to the relevant content of S301 and will not be repeated here. Also, for detailed descriptions of demapping physical resources, equalization, and de-phase rotation, please refer to the foregoing description, which will not be described again here.

The first signal undergoes demapping physical resource processing and equalization processing to obtain [X ₂ (m)]. 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 ₂ (m)] is obtained; alternatively, the first signal can also be obtained through other equivalent implementation methods, and [X ₂ (m)] is obtained. The embodiment of the present application is not limited thereto.

In this case, in S304, 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)].

Among them, the process of the base station obtaining [X ₂ (m)] 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 M symbols are taken out from the frequency domain position, and then [X ₂ (m)] composed of M elements is obtained through equalization. It should be understood that the base station can also obtain [X ₂ (m)] based on the first signal through other equivalent methods. The embodiment of this application does not describe the specific implementation process of the base station obtaining [X ₂ (m)] based on the first signal. It is not limited to this.

In addition, for the specific implementation process of the base station obtaining [k(m)] based on [X ₂ (m)] and the base station obtaining [s(m)] based on [k(m)], please refer to the aforementioned relevant descriptions and will not be repeated here. .

In the above embodiment, the terminal device determines [k(m)] based on the modulation symbol and the phase rotation factor, which can make the phase difference of the waveform corresponding to two adjacent elements in [k(m)] far away from 0 degrees or 180 degrees. , in this way, the instantaneous peak power of the subsequent superimposed signal can be reduced, thereby reducing the PAPR of the first signal and improving the coverage of the PAPR of the first signal.

Figure 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)]. Where [s(m)] includes M modulation symbols. Alternatively, the modulation symbol is denoted as s(m), which is a modulation symbol. For ease of understanding, 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. For example, the terminal device can modulate the first information to obtain [s(m)], and the modulation method is not limited to QPSK, BPSK, π/2-BPSK or OQPSK. For descriptions of [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). Q is the sum of M and E, that is, Q=M+E. 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.

In this embodiment, the frequency domain sequence corresponding to the first information can be recorded as [X ₆ (m)]. The [X ₆ (m)] consists of M elements The composition is the M symbols obtained by performing DFT on [s(m)]. The M symbols correspond to the M elements in [X ₆ (m)] one-to-one. The M elements of [X ₆ (m)] can be respectively: X ₆ (0),..., X ₆ (M-1). This [X ₆ (m)] can also be called a frequency domain signal, sequence, symbol stream, symbol string or symbol set, etc. The name of [X ₆ (m)] is not limited to this in the embodiment of the present application.

As an example, the element X ₅ (q) in [X ₅ (q)] can be X ₆ ((q+MP)mod M), that is, X ₅ (q)=X ₆ ((q+MP) )mod M). Where 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.

In this embodiment, 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. It should be understood that the first element of [X ₆ (m)] is X ₆ (0) and the last element of [X ₆ (m)] is X ₆ (M-1).

In Figure 8, taking M=4, E=3, P=1 as an example, the frequency domain sequence before cyclic expansion, that is, [X ₆ (m)], is given by X ₆ (0), X ₆ (1), X ₆ (2), and X ₆ (3); the _frequency domain sequence after cyclic expansion, that is, [X ₅ (q)], consists of X ₅ (0), X ₅ (1), X ₅ (3), X ₅ ₍ 4), X ₅ (5), and X ₅ (6) are composed, where X ₅ (0) is _X ₆ (3), ), X ₅ (2) is X ₆ (1), X ₅ (3) is X ₆ (2), X ₅ (4) is X ₆ (3), X ₅ (5) is X ₆ (0), and X ₅ (6) is X ₆ (1).

As an example, the value of P is related to M, which can be understood as P is determined based on M. For example, P is determined based on M and E. For example, the modulation mode of [s(m)] is QPSK, and P can be an integer determined based on (±M/4+E-1)/2. For example, the P may be an integer value of (±M/4+E-1)/2, or an integer value close to (±M/4+E-1)/2. Alternatively, 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.

It should be noted that 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. For example, 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.

It should be noted that 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. Similarly, 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. However, the embodiments of the present application are not limited to this.

As an example, 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 E may be predefined, for example, a fixed positive integer; or the value of the E may be related to M, for example, E may be directly proportional to M, such as E=M/4. The embodiment of the present application is not limited to this.

In S701, 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)].

It should be understood that in S701, the terminal device determines [X ₅ (q)] based on [s(m)], which can also be expressed as the terminal device determines X ₅ (q) based on s(m).

S702: The terminal device generates the first signal according to [X ₅ (q)].

For example, the first signal may be PUSCH, or PUCCH, or a reference signal, etc. The embodiment of the present application is not limited to this specific implementation form of the first signal.

In this embodiment, 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.

As an example, the first signal is a signal generated by [X ₅ (q)] after mapping physical resources. In this case, in S702, the terminal device may map Q elements in [X ₅ (q)] to Q subcarriers to generate the first signal. For example, 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. It should be understood that 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.

As another example, 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. In this case, in S702, 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.

Where [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). Taking Q=4 as an example, X ₇ (0) is X ₅ (0) × w ₃ (0), X ₇ (1) is X ₅ (1) × w ₃ (1), and X ₇ (2) is X ₅ (2) × w ₃ (2), X ₇ (3) is X ₅ (3) × w ₃ (3). In addition, 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.

Optionally, the Q elements in [w ₃ (q)] are symmetrically equal, that is, w ₃ (q) is w ₃ (Q-1-q). For example, Q=6, then w ₃ (0)=w ₃ (5), w ₃ (1)=w ₃ (4), w ₃ (2)=w ₃ (3). Correspondingly, [X ₇ (q)] is [X ₅ (q)] and obtains Q symbols through symmetric filtering. By performing symmetric filtering on [X ₅ (q)], the PAPR of the subsequently generated first signal can be reduced.

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. It should be understood that 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. Correspondingly, the base station receives the first signal.

For example, the terminal device sends the first signal to the base station through an antenna. Correspondingly, the base station can receive the first signal through the antenna.

S704: The base station obtains [s(m)] from the first signal.

In S704, 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)]. In this embodiment, [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.

As an example, [X ₅ (q)] is Q symbols obtained by demapping physical resources and equalizing the first signal. In this case, [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)]. For the de-loop expansion, please refer to the relevant content of S304, which will not be described again here.

Among them, the first signal undergoes demapping physical resource processing and equalization processing to obtain [X ₅ (q)]. It can also 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. , to obtain [X ₅ (q)]; or, the first signal can also be obtained in other equivalent ways to obtain [X ₅ (q)], and the embodiment of the present application is not limited thereto.

Correspondingly, in S704, the base station can obtain [X ₅ (q)] according to the first signal, and obtain [s(m)] according to [X ₅ (q)].

Among them, 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. It should be understood that 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.

In the above embodiment, 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.

Figure 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.

S901: The terminal device determines [X ₈ (m)] based on the modulation symbol.

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)]. For the description of [X ₆ (m)], please refer to the relevant content of S701 and will not be repeated here.

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)]. For example, 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. In this embodiment, 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.

In Figure 10, taking M=8, P=2 as an example, the frequency domain sequence before cyclic shift, that is, [X ₆ (m)] 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.

As an example, the value of P is related to M, which can be understood as P is determined based on M. For example, the modulation mode of [s(m)] is QPSK, and P can be an integer determined based on (±M/4-1)/2. For example, the P may be an integer value of (±M/4-1)/2, or an integer value close to (±M/4-1)/2. Alternatively, 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.

It should be noted that the value of P is related to M, which can be understood as the number of elements contained in [s(m)], or as the number of elements mapped when [X ₆ (m)] is mapped to a subcarrier. The number of subcarriers, but the embodiment of the present application is not limited to this.

In S901, 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.

It should be understood that in S901, 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).

S902: The terminal device generates the first signal according to [X ₈ (m)].

In this embodiment, the first signal may be [X ₈ (m)], which is generated after mapping physical resources; or, the first signal may be [X ₈ (m)], which is filtered and mapped to physical resources. The generated signal; alternatively, the first signal can also be a signal generated by [X ₈ (m)] through other methods. The specific implementation process of generating the first signal in the embodiment of the present application is not limited to this. For descriptions of mapping physical resources and filtering, please refer to the relevant description of S302 and will not be repeated here.

As an example, the first signal is a signal generated by [X ₈ (m)] after mapping physical resources. In this case, in S902, the terminal device may map M elements in [X ₈ (m)] to M subcarriers to generate the first signal. For example, the terminal device can map M elements in [X ₈ (m)] to M 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. It should be understood that 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.

As another example, the first signal is a signal generated after [X ₈ (m)] is filtered and mapped to physical resources. Among them, [X ₈ (m)] is filtered to obtain [X ₉ (m)]; [X ₉ (m)] is the first signal after mapping physical resources. In this case, in S902, the terminal device can filter [X ₈ (m)] to obtain [X ₉ (m)], and then map the M elements of [X ₉ (m)] to M subcarriers on, generating the first signal.

Where [X ₉ (m)] consists of M elements. The M elements of [X ₉ (m)] can be respectively: X ₉ (0),..., X ₉ (M-1). This [X ₉ (m)] can be called a frequency domain signal, a sequence, a symbol stream, a symbol string or a symbol set. The name of [X ₉ (m)] in the embodiment of the present application is not limited to this. The element X ₉ (m) in [X ₉ (m)] is the product of the element X _{8 (m) in [X 8} ₍ m)] and the filter coefficient w ₄ (m), that is, [X ₉ (m)] element X ₉ (m) is X ₈ (m)×w ₄ (m). Taking M=4 as an example, X ₉ (0) is X ₈ (0) × w ₄ (0), X ₉ (1) is X ₈ (1) × w ₄ (1), and X ₉ (2) is X ₈ (2) × w ₄ (2), X ₉ (3) is X ₈ (3) × w ₄ (3). In addition, please refer to the relevant content of S301 for the specific description of mapping physical resources, which will not be described again here.

The w ₄ (m) is an element in [w ₄ (m)]. [w ₄ (m)] consists of M elements, which correspond to M filter coefficients one-to-one. The M elements of [w ₄ (m)] can be respectively: w ₄ (0),..., w ₄ (M-1). [w ₄ (m)] may be predefined, but the embodiment of the present application is not limited thereto.

Optionally, the M elements in [w ₄ (m)] are symmetrically equal, that is, w ₄ (m) is w ₄ (M-1-m). For example, M=4, then w ₄ (0)=w ₄ (3), w ₄ (1)=w ₄ (2). Correspondingly, [X ₉ (m)] is [X ₈ (m)], which undergoes symmetric filtering to obtain M symbols. By performing symmetric filtering on [X ₈ (m)], the PAPR of the subsequently generated first signal can be reduced.

The terminal device filters [X ₈ (m)], which can be understood as the terminal device multiplying the element X ₈ (m) in [X ₈ (m)] by the filter coefficient w ₄ (m) to obtain M Elements composed of [X ₉ (m)]. It should be understood that filtering [X ₈ (m)] by the terminal device can also be implemented through the above frequency domain filtering method, or through other equivalent methods, such as If filtering is performed in the time domain, the embodiments of the present application are not limited to this.

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. It should be understood that 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.

S903: The terminal device sends the first signal to the base station; accordingly, the base station receives the first signal.

S904: The base station obtains [s(m)] from the first signal.

For example, the base station can obtain [X ₈ (m)] from the first signal, and then obtain [s(m)] based on [X ₈ (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 [X ₈ (m)] from the first signal, and then obtain the first information based on [X ₈ (m)], without the need to obtain [X ₈ (m)]. m)] gets [s(m)]. For example, the base station can demodulate and decode according to [X ₈ (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 [X ₈ (m)] from the first signal can be understood as the reverse process of the terminal device generating the first signal according to [X ₈ (m)]. In this embodiment, [X ₈ (m)] may be M 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.

As an example, [X ₈ (m)] is M symbols obtained by demapping physical resources and equalizing the first signal. In this case, [s(m)] may be M symbols obtained by demapping physical resources, equalization, decyclic shift and IDFT of the first signal. The first signal is de-mapping physical resources and equalizing to obtain [X ₈ (m)]; the [X ₈ (m)] is decyclically expanded to obtain [X ₆ (m)]; the [X ₆ (m)] is IDFT processing results in [s(m)].

Among them, decyclic shift refers to the inverse process of cyclic shift, that is, the inverse process of cyclic shift performed by the terminal device on the frequency domain sequence. This cyclic shift can be understood as the base station obtaining the frequency domain sequence before cyclic shift from the frequency domain sequence corresponding to the received analog signal. In this embodiment, the frequency domain sequence corresponding to the analog signal is [X ₈ (m)]. The frequency domain sequence before cyclic shift is [X ₆ (m)].

_The first signal undergoes demapping physical resources and equalization to obtain [ ₈ (m)]; or, the first signal can also be obtained in other equivalent ways to obtain [X ₈ (m)], and the embodiments of the present application are not limited thereto.

Correspondingly, in S904, the base station can obtain [X ₈ (m)] according to the first signal, and obtain [s(m)] according to [X ₈ (m)].

The process of the base station obtaining [X ₈ (m)] 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)] composed of N elements. ,...,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 frequency of the first signal M symbols are taken out from the domain position, and then [X ₈ (m)] composed of M elements is obtained through equalization. It should be understood that the base station based on the first The signal acquisition [X ₈ (m)] can also be implemented in other equivalent ways. The specific implementation process of the base station acquiring [X ₈ (m)] based on the first signal in the embodiment of the present application is not limited to this.

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. In the embodiment of the present application The specific implementation process for the base station to obtain [s(m)] based on [X ₈ (m)] is not limited to this.

In the above embodiment, the frequency domain sequence of the first information of the terminal device is cyclically shifted, 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.

It can be understood that, in order to implement the functions in the above embodiments, the base station and the terminal equipment include corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that 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.

Figures 11 and 12 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. The communication device can also be called a signal transmission device. These communication devices can be used to implement the functions of the terminal equipment or base station in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be one of the terminal devices 120a-120j as shown in Figure 1, or may be the network device 110a or 110b as shown in Figure 1, or may be applied to the terminal device. Or modules of network equipment (such as chips).

As shown in Figure 11, the communication device 1100 includes a processing module 1101 and a transceiver module 1102. The communication device 1100 is used to implement the functions of the terminal equipment or base station in the method embodiments shown in FIG. 3, FIG. 7 or FIG. 9.

If the communication device 1100 is used to implement the functions of the terminal device in the method embodiment shown in FIG. 3, FIG. 7 or FIG. 9, as an example, the processing module 1101 is used to adjust the modulation symbol [s(m)] and the phase according to the modulation symbol [s(m)] and the phase. rotation factor Determine [k(m)], where the [s(m)] consists of M elements, and the It consists of M elements, the [k(m)] consists of M elements, the M is a positive integer, and the elements in is e ^jθm , the θ is determined based on the M, and the element k(m) in the [k(m)] is The m belongs to {0,...,M-1}; and the first signal is generated according to the [k(m)]. Transceiver module 1102, configured to send the first signal.

In an optional implementation, the first signal is a signal generated by [k(m)] after discrete Fourier transform, cyclic expansion and mapping of physical resources; or, the first signal is The [k(m)] is a signal generated after discrete Fourier transform, cyclic expansion, filtering and mapping of physical resources; or, the first signal is the [k(m)] after discrete Fourier transform and a signal generated after mapping physical resources; or, the first signal is a signal generated after [k(m)] undergoes discrete Fourier transform, filtering, and mapping physical resources.

In an optional implementation, the processing module 1101, when generating the first signal according to the [k(m)], is specifically configured to: obtain [X ₁ (q) according to the [k(m)] ], where the [X ₁ (q)] consists of Q elements, the Q is the sum of the M and E, the E is a positive integer, the elements in the [X ₁ (q)] _X ₁ (q) is _{X 2} ₍ (q+MP ₎ mod M), which ] are M symbols obtained by performing discrete Fourier transform on the [k(m)], A mod B represents the remainder of A divided by B, and the P is greater than or equal to 0 and less than or equal to the E Integer, the q belongs to {0,...,Q-1}; map the Q elements of [X ₁ (q)] to On Q subcarriers, the first signal is generated.

In an optional implementation, the processing module 1101 generates a first signal according to the [k(m)], for: obtaining [X ₁ (q)] according to the [k(m)] , wherein the [X ₁ (q)] consists of Q elements, the Q is the sum of the M and E, the E is a positive integer, the element X in the [X ₁ (q)] ₁ (q) is X ₂ ( ₍ q+MP ₎ mod M), _the element of ] are M symbols obtained by performing discrete Fourier transform on the [k(m)], A mod B represents the remainder of A divided by B, and the P is greater than or equal to 0 and less than or equal to the E Integer, the q belongs to {0,...,Q-1}; filter the [X ₁ (q)] to obtain [X ₃ (q)], where the [X ₃ (q)] is given by Composed of Q elements; map the Q elements of [X ₃ (q)] to Q subcarriers to generate the first signal.

In an optional implementation manner, the θ is determined based on the M, including: the θ is determined based on the M, the P and the E.

In an optional implementation manner, the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and the θ is π(±M/4+E-2P-1)/M.

In an optional implementation, when generating the first signal according to the [k(m)], the processing module 1101 is configured to: perform discrete Fourier transform on the M elements of the [k(m)]. Transform processing to obtain [X ₂ (m)], which is composed of M elements; map the M elements of [X ₂ (m)] to _M subcarriers to generate the Describe the first signal.

In an optional implementation manner, when generating the first signal according to the [k(m)], the processing module 1101 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.

In an optional implementation, the modulation mode of [s(m)] is quadrature phase shift keying QPSK, and the θ is π(±M/4-1)/M.

As another example, the processing module 1101 is configured to determine [X ₅ (q)] according to the modulation symbol [s(m)], where the [s(m)] is composed of M elements, and the M is a positive integer. , the [X ₅ (q)] consists of Q elements, the Q is the sum of the M and E, the E is a positive integer, where the element X in the [X ₅ (q)] ₅ ₍ q) is _{X 6} ₍ (q+MP ₎ mod M), which are M symbols obtained by performing discrete Fourier transform on the [s(m)], A mod B represents the remainder of A divided by B, the P is determined based on the M, and the P is greater than or An integer equal to 0 and less than or equal to the E, the P is not equal to (EP), the m belongs to {0,...,M-1}, and the q belongs to {0,...,Q-1 }; and generating a first signal according to [X ₅ (q)]. Transceiver module 1102, configured to send the first signal.

In an optional implementation, 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.

In an optional implementation manner, the P is determined based on the M, including: the P is determined based on the M and the E.

In an optional implementation, 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 .

In an optional implementation, 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.

In an optional implementation, the processing module 1101 generates the first signal according to [X ₅ (q)] for: Filter the [X ₅ (q)] to obtain [X ₇ (q)], the [X ₇ (q)] is composed of Q elements; the Q elements of the [X ₇ (q)] are mapped onto Q subcarriers to generate the first signal.

As another example, the processing module 1101 is configured to determine [X ₈ (m)] according to the modulation symbol [s(m)], where the [s(m)] is composed of M elements, and the M is a positive integer. , the [X ₈ (m)] is composed of M elements, wherein the element X 8 (m) _in the [X ₈ (m)] is X ₆ ((m+MP)mod M), and the X ₆ ((m+MP)mod M) is an element in [X ₆ (m)], and [X ₆ (m)] is M obtained by performing discrete Fourier transform on [s(m)] symbols, A mod B represents the remainder of A divided by B, the P is determined according to the M, the P is a positive integer, the m belongs to {0,...,M-1}; and, according to Said [X ₈ (m)] generates the first signal. Transceiver module 1102, configured to send the first signal.

In an optional implementation, the first signal is a signal generated by mapping physical resources to [X ₈ (m)]; or, the first signal is the [X ₈ (m) ] The signal generated after filtering and mapping physical resources.

In an optional implementation manner, 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.

In an optional implementation, when generating the first signal according to [X ₈ (m)], the processing module 1101 is configured to: map M elements of [X ₈ (m)] to M On subcarriers, the first signal is generated.

In an optional implementation, when the processing module 1101 generates the first signal according to the [X ₈ (m)], it is used to: filter the [X ₈ (m)] to obtain [X ₉ ( m)], the [X ₉ (m)] is composed of M elements; the M elements of the [X ₉ (m)] are mapped to M subcarriers to generate the first signal.

If the communication device 1100 is used to implement the functions of the terminal device in the method embodiment shown in Figure 3, Figure 7 or Figure 9, as an example, 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 ^jθm , the θ 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.

In an optional implementation, 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.

In an optional implementation, 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)].

In an optional implementation, 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.

In an optional implementation manner, 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)].

In an optional implementation, 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)].

As another example, 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,...,M-1}, The q belongs to {0,...,Q-1}. The processing module 1101 is used to obtain the [s(m)] from the first signal.

In an optional implementation, the [s(m)] is a modulation symbol obtained by demapping physical resources, equalization, decyclic expansion, and inverse discrete Fourier transform of the first signal.

In an optional implementation, 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.

In an optional implementation, 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.

As another example, 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.

In an optional implementation manner, the [s(m)] is a modulation symbol obtained by demapping physical resources, equalization, decyclic shift, and inverse discrete Fourier transform of the first signal.

In an optional implementation, 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.

In an optional implementation, 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)].

More detailed descriptions about the above processing module 1101 and transceiver module 1102 can be obtained directly by referring to the relevant descriptions in the method embodiments shown in Figure 3, Figure 7 or Figure 9, and will not be described again here.

As shown in FIG. 12 , communication device 1200 includes processor 1210 . Optionally, 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. Optionally, 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. Optionally, the memory 1230, the processor 1210 and the communication interface 1220 are connected through a bus 1240. In the embodiments of this application, instructions may also refer to computer programs, codes, program codes, programs, applications, software, or executable files.

When the communication device 1200 is used to implement the method shown in Figure 3, Figure 7 or Figure 9, 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.

When the above communication device is a chip applied to a terminal device, 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.

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.

It can be understood that the 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. Of course, 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. When the computer program or instructions are run, the steps executed by the network device or the terminal device in the foregoing method embodiments are implemented. method. In this way, the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products. Based on this understanding, 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.

This application also provides a computer program product. The computer program product includes: 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.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. 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 programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. 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. For example, 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.

In the various embodiments of this application, if there is no special explanation or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In addition, it should be understood that in the embodiments of this application, the word "exemplary" is used to mean an example, illustration or explanation. Any embodiment or design described herein as "example" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present a concept in a concrete way.

In addition, in the embodiments of this application, information (information), signal (signal), message (message), and channel (channel) can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they intend to express are the same. of. "Of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they convey are consistent.

In this application, "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. In the text description of this application, 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.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

Claims

A communication method, characterized by including:

According to the modulation symbol [s(m)] and the phase rotation factor Determine [k(m)], where the [s(m)] consists of M elements, and the It consists of M elements, the [k(m)] consists of M elements, the M is a positive integer, and the elements in is e jθm , the θ is determined based on the M, and the element k(m) in the [k(m)] is The m belongs to {0,...,M-1};

A first signal is generated according to the [k(m)], and the first signal is sent.
The method according to claim 1, characterized in that:

The first signal is a signal generated by discrete Fourier transform, cyclic expansion, and mapping of physical resources to [k(m)]; or,

The first signal is a signal generated by discrete Fourier transform, cyclic expansion, filtering and mapping of physical resources to [k(m)]; or,

The first signal is a signal generated after the [k(m)] undergoes discrete Fourier transform and mapping of physical resources; or,

The first signal is a signal generated by discrete Fourier transform, filtering and mapping of physical resources to [k(m)].
The method according to claim 1 or 2, characterized in that generating the first signal according to the [k(m)] includes:

According to the [k(m)], obtain [X 1 (q)], where the [X 1 (q)] consists of Q elements, the Q is the sum of the M and E, and the E is a positive integer, 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 [ elements in Remainder, the P is an integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The Q elements of [X 1 (q)] are mapped onto Q subcarriers to generate the first signal.
The method according to claim 1 or 2, characterized in that generating the first signal according to the [k(m)] includes:

According to the [k(m)], obtain [X 1 (q)], where the [X 1 (q)] consists of Q elements, the Q is the sum of the M and E, and the E is a positive integer, 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 [ elements in Remainder, the P is an integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

Filter the [X 1 (q)] to obtain [X 3 (q)], where the [X 3 (q)] consists of Q elements;

The Q elements of [X 3 (q)] are mapped onto Q subcarriers to generate the first signal.
The method according to claim 3 or 4, characterized in that the θ is determined according to the M, including:

The θ is determined based on the M, the P and the E.
The method according to any one of claims 3 to 5, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π (±M/4+ E-2P-1)/M.
The method according to claim 1 or 2, characterized in that generating the first signal according to the [k(m)] includes:

Perform discrete Fourier transform processing on the M elements of [k(m)] to obtain [X 2 (m)], where the [X 2 (m)] is composed of M elements;

Map the M elements of [X 2 (m)] to M subcarriers to generate the first signal.
The method according to claim 1 or 2, characterized in that generating the first signal according to the [k(m)] includes:

Perform discrete Fourier transform processing on the M elements of [k(m)] to obtain [X 2 (m)], where the [X 2 (m)] is composed of M elements;

Filter the [X 2 (m)] to obtain [X 4 (m)], where the [X 4 (m)] consists of M elements;

Map the M elements of [X 4 (m)] to M subcarriers to generate the first signal.
The method according to claim 7 or 8, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π(±M/4-1)/M .
A communication method, characterized by including:

According to the modulation symbol [s(m)], determine [X 5 (q)], the [s(m)] is composed of M elements, the M is a positive integer, the [X 5 (q)] is It consists of Q elements, the Q is the sum of the M and E, the E is a positive integer, wherein the element X 5 (q) in the [X 5 (q)] is X 6 ((q+ MP) mod M), the X 6 ((q+MP) mod M) is an element of [X 6 (m)], the [X 6 (m)] is the element of the [s(m)] M symbols obtained by performing 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 greater than or equal to 0 and less than or equal to the E. Integers, the P and (EP) are not equal, the m belongs to {0,...,M-1}, and the q belongs to {0,...,Q-1};

A first signal is generated based on the [X 5 (q)] and the first signal is sent.
The method according to claim 10, characterized in that:

The first signal is a signal generated by mapping physical resources to [X 5 (q)]; or,

The first signal is a signal generated after the [X 5 (q)] is filtered and mapped to physical resources.
The method according to claim 10 or 11, characterized in that the P is determined based on the M, including: the P is determined based on the M and the E.
The method according to claim 12, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4+E-1)/2 A definite integer.
The method according to any one of claims 10 to 13, wherein generating the first signal according to [X 5 (q)] includes:

The Q elements of [X 5 (q)] are mapped onto Q subcarriers to generate the first signal.
The method according to any one of claims 10 to 13, wherein generating the first signal according to [X 5 (q)] includes:

Filter the [X 5 (q)] to obtain [X 7 (q)], where the [X 7 (q)] consists of Q elements;

The Q elements of [X 7 (q)] are mapped onto Q subcarriers to generate the first signal.
A communication method, characterized by including:

According to the modulation symbol [s(m)], determine [X 8 (m)], the [s(m)] consists of M elements, the M is a positive integer, the [X 8 (m)] is composed of It consists of M elements, wherein the element X 8 (m) in [X 8 (m)] is X 6 ((m+MP)mod M), and the X 6 ( (m+MP)mod M) is an element in [X 6 (m)], the [X 6 (m)] is the M symbols obtained by performing the discrete Fourier transform on the [s(m)], A mod B means A divided by The remainder of B, the P is determined based on the M, the P is a positive integer, and the m belongs to {0,...,M-1};

A first signal is generated based on the [X 8 (m)] and the first signal is sent.
The method according to claim 16, characterized in that:

The first signal is a signal generated by mapping physical resources to [X 8 (m)]; or,

The first signal is a signal generated after the [X 8 (m)] is filtered and mapped to physical resources.
The method according to claim 16 or 17, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4-1)/2 A definite integer.
The method according to any one of claims 16 to 18, characterized in that generating the first signal according to [X 8 (m)] includes:

Map the M elements of [X 8 (m)] to M subcarriers to generate the first signal.
The method according to any one of claims 16 to 18, characterized in that generating the first signal according to [X 8 (m)] includes:

Filter the [X 8 (m)] to obtain [X 9 ( m)], which is composed of M elements;

Map the M elements of [X 9 (m)] to M subcarriers to generate the first signal.
A communication method, characterized by including:

Receive a first signal, the first signal is a signal generated according to [k(m)], the [k(m)] is a signal 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 jθm , the θ is determined based on the M, and the element k(m) in the [k(m)] is The m belongs to {0,...,M-1};

The [s(m)] is obtained from the first signal.
The method according to claim 21, characterized in that:

The [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; 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 method according to claim 21 or 22, characterized in that 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)], where the [X 1 (q)] consists of Q elements, and the Q is the sum of the M and E, The E is a positive integer;

The [X 1 (q)] is Q symbols obtained by cyclic expansion of [X 2 (m)], wherein the element X 1 (q) in the [X 1 (q)] is X 2 (( q+MP) mod M), the X 2 ((q+MP) mod M) is the element in the [X 2 (m)], A mod B represents the remainder of A divided by B, and the P is An integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The [X 2 (m)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The method according to claim 21 or 22, characterized in that 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)], where the [X 3 (q)] consists of Q elements, and the Q is the sum of the M and E, The E is a positive integer;

The [X 3 (q)] is Q symbols obtained by filtering [X 1 (q)];

The [X 1 (q)] is Q symbols obtained by cyclic expansion of [X 2 (m)], where the elements in the [X 1 (q)] X 1 ( q) is The remainder after dividing by B, the P is an integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The [X 2 (m)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The method according to claim 23 or 24, characterized in that the θ is determined according to the M, including:

The θ is determined based on the M, the P and the E.
The method according to any one of claims 23 to 25, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π (±M/4+ E-2P-1)/M.
The method according to claim 21 or 22, characterized in that 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 method according to claim 21 or 22, characterized in that 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)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The method according to claim 27 or 28, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π(±M/4-1)/M .
A communication method, characterized by including:

Receive a first signal, which is a signal generated based on [X 5 (q)], which is Q symbols determined based on the modulation symbol [s(m)], where, The [s(m)] is composed of M elements, the M is a positive integer, the Q is the sum of the M and E, the E is a positive integer, and the [X 5 (q)] The element of X 5 (q) is X 6 ((q + MP ) mod M), the (m)] are M symbols obtained by performing discrete Fourier transform on the [s(m)], A mod B represents the remainder of A divided by B, the P is determined based on the M, and 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), the m belongs to {0,..., M-1}, and the q belongs to {0,... ,Q-1};

The [s(m)] is obtained from the first signal.
The method according to claim 30, characterized in that:

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 method according to claim 30 or 31, characterized in that the P is determined based on the M, including: the P is determined based on the M and the E.
The method according to claim 32, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4+E-1)/2 A definite integer.
The method according to any one of claims 30 to 33, characterized in that 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 5 (q)].
The method according to any one of claims 30 to 33, characterized in that 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.
A communication method, characterized by including:

Receive a first signal, the first signal is a signal generated according to [X 8 (m)], the [X 8 (m)] generation is M symbols determined according to the modulation symbol [s(m)], where , the [s(m)] consists of M elements, the M is a positive integer, the element X 8 (m) in the [X 8 (m)] is X 6 ( (q+MP)mod M ) , said M symbols obtained by leaf transformation, 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 to {0,...,M-1 };

The [s(m)] is obtained from the first signal.
The method according to claim 36, characterized in that:

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 method according to claim 36 or 37, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4-1)/2 A definite integer.
The method according to any one of claims 36 to 38, characterized in that 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 8 (m)].
The method according to any one of claims 36 to 38, characterized in that 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)], and the [X 9 (m)] is composed of M elements;

The [X 9 (m)] is the M symbols obtained by filtering the [X 8 (m)].
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the processing module is used to calculate the modulation symbol [s(m)] and the phase rotation factor Determine [k(m)], where the [s(m)] consists of M elements, and the It consists of M elements, the [k(m)] consists of M elements, the M is a positive integer, and the elements in is e jθm , the θ is determined based on the M, and the element k(m) in the [k(m)] is The m belongs to {0,...,M-1}; and the first signal is generated according to the [k(m)];

The transceiver module is used to send the first signal.
The device according to claim 41, characterized in that:

The first signal is a signal generated by discrete Fourier transform, cyclic expansion, and mapping of physical resources to [k(m)]; or,

The first signal is a signal generated by discrete Fourier transform, cyclic expansion, filtering and mapping of physical resources to [k(m)]; or,

The first signal is a signal generated after the [k(m)] undergoes discrete Fourier transform and mapping of physical resources; or,

The first signal is a signal generated by discrete Fourier transform, filtering and mapping of physical resources to [k(m)].
The device according to claim 41 or 42, wherein when generating the first signal according to the [k(m)], the processing module is specifically configured to:

According to the [k(m)], obtain [X 1 (q)], where the [X 1 (q)] consists of Q elements, the Q is the sum of the M and E, and the E is a positive integer, 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 [ elements in Remainder, the P is an integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The Q elements of [X 1 (q)] are mapped onto Q subcarriers to generate the first signal.
The device according to claim 41 or 42, wherein when generating the first signal according to the [k(m)], the processing module is specifically configured to:

According to the [k(m)], obtain [X 1 (q)], where the [X 1 (q)] consists of Q elements, the Q is the sum of the M and E, and the E is a positive integer, 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 [ elements in Remainder, the P is an integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

Filter the [X 1 (q)] to obtain [X 3 (q)], where the [X 3 (q)] consists of Q elements;

The Q elements of [X 3 (q)] are mapped onto Q subcarriers to generate the first signal.
The device according to claim 43 or 44, characterized in that the θ is determined according to the M, including:

The θ is determined based on the M, the P and the E.
The device according to any one of claims 43 to 45, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π (±M/4+ E-2P-1)/M.
The device according to claim 41 or 42, characterized in that, when generating the first signal according to the [k(m)], the processing module is specifically used to:

Perform discrete Fourier transform processing on the M elements of [k(m)] to obtain [X 2 (m)], where the [X 2 (m)] is composed of M elements;

Map the M elements of [X 2 (m)] to M subcarriers to generate the first signal.
The device according to claim 41 or 42, wherein when generating the first signal according to the [k(m)], the processing module is specifically configured to:

Perform discrete Fourier transform processing on the M elements of [k(m)] to obtain [X 2 (m)], where the [X 2 (m)] is composed of M elements;

Filter the [X 2 (m)] to obtain [X 4 (m)], where the [X 4 (m)] consists of M elements;

Map the M elements of [X 4 (m)] to M subcarriers to generate the first signal.
The device according to claim 47 or 48, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the θ is π(±M/4-1)/M .
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the processing module is used to determine [X 5 (q)] according to the modulation symbol [s(m)], the [s(m)] is composed of M elements, and the M is a positive integer, so Said [X 5 (q)] consists of Q elements, and said Q is the sum of said M and E, The E is a positive integer, wherein the element X 5 (q) in the [X 5 ( q )] is X 6 ((q+MP)mod M), and the X 6 ((q+MP)mod M) is an element in [X 6 (m)], the [X 6 (m)] is the M symbols obtained by performing discrete Fourier transform on the [s(m)], A mod B represents A The remainder divided by B, the P is determined based on 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,...,M-1}, the q belongs to {0,...,Q-1}; and the first signal is generated according to the [X 5 (q)];

The transceiver module is used to send the first signal.
The device according to claim 50, characterized in that:

The first signal is a signal generated by mapping physical resources to [X 5 (q)]; or,

The first signal is a signal generated after the [X 5 (q)] is filtered and mapped to physical resources.
The device according to claim 50 or 51, characterized in that the P is determined according to the M, including: the P is determined according to the M and the E.
The device according to claim 52, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4+E-1)/2 A definite integer.
The device according to any one of claims 50 to 53, wherein when generating the first signal according to [X 5 (q)], the processing module is specifically used to:

The Q elements of [X 5 (q)] are mapped onto Q subcarriers to generate the first signal.
The device according to any one of claims 50 to 53, wherein when generating the first signal according to [X 5 (q)], the processing module is specifically used to:

Filter the [X 5 (q)] to obtain [X 7 (q)], where the [X 7 (q)] consists of Q elements;

The Q elements of [X 7 (q)] are mapped onto Q subcarriers to generate the first signal.
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the processing module is used to determine [X 8 (m)] according to the modulation symbol [s(m)], the [s(m)] is composed of M elements, and the M is a positive integer, so Said [X 8 (m)] is composed of M elements, wherein the element X 8 (m ) in said [X 8 (m)] is X 6 ( (m+MP)mod M), and said X 6 ((m+MP)mod M) is an element in [X 6 (m)], and the [X 6 (m)] is the M elements obtained by performing a discrete Fourier transform on the [s(m)] Symbol, A mod B represents the remainder of A divided by B, the P is determined according to the M, the P is a positive integer, the m belongs to {0,...,M-1}; and, according to the [X 8 (m)] generates the first signal;

The transceiver module is used to send the first signal.
The device according to claim 56, characterized in that:

The first signal is a signal generated by mapping physical resources to [X 8 (m)]; or,

The first signal is a signal generated after the [X 8 (m)] is filtered and mapped to physical resources.
The device according to claim 56 or 57, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4-1)/2 A definite integer.
The device according to any one of claims 56 to 58, wherein when generating the first signal according to the [X 8 (m)], the processing module is specifically configured to:

Map the M elements of [X 8 (m)] to M subcarriers to generate the first signal.
The device according to any one of claims 56 to 58, wherein when generating the first signal according to the [X 8 (m)], the processing module is specifically configured to:

Filter the [X 8 (m)] to obtain [X 9 ( m)], which is composed of M elements;

Map the M elements of [X 9 (m)] to M subcarriers to generate the first signal.
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the transceiver module is used to receive a first signal, the first signal is a signal generated according to [k(m)], the [k(m)] is a signal generated according to the modulation symbol [s(m)] and 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 jθm , the θ 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 is used to obtain the [s(m)] from the first signal.
The device according to claim 61, characterized in that:

The [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; 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 device according to claim 61 or 62, characterized in that 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)], where the [X 1 (q)] consists of Q elements, and the Q is the sum of the M and E, The E is a positive integer;

The [X 1 (q)] is Q symbols obtained by cyclic expansion of [X 2 (m)], wherein the element X 1 (q) in the [X 1 (q)] is X 2 (( q+MP) mod M), the X 2 ((q+MP) mod M) is the element in the [X 2 (m)], A mod B represents the remainder of A divided by B, and the P is An integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The [X 2 (m)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The device according to claim 61 or 62, characterized in that 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)], where the [X 3 (q)] consists of Q elements, and the Q is the sum of the M and E, The E is a positive integer;

The [X 3 (q)] is Q symbols obtained by filtering [X 1 (q)];

The [X 1 (q)] is Q symbols obtained by cyclic expansion of [X 2 (m)], wherein the element X 1 (q) in the [X 1 (q)] is X 2 (( q+MP) mod M), the X 2 ((q+MP) mod M) is the element in the [X 2 (m)], A mod B represents the remainder of A divided by B, and the P is An integer greater than or equal to 0 and less than or equal to the E, and the q belongs to {0,...,Q-1};

The [X 2 (m)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The device according to claim 63 or 64, characterized in that the θ is determined according to the M, including:

The θ is determined based on the M, the P and the E.
The device according to any one of claims 63 to 65, characterized in that the modulation mode of [s(m)] is four-phase phase shift keying QPSK, and the θ is π (±M/4+ E-2P-1)/M.
The device according to claim 61 or 62, characterized in that 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 device according to claim 61 or 62, characterized in that 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)] is M symbols obtained by the discrete Fourier transform of the [k(m)].
The device according to claim 67 or 68, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the θ is π(±M/4-1)/M .
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the transceiver module is used 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) ] determined Q symbols, wherein the [s(m)] consists of M elements, the M is a positive integer, the Q is the sum of the M and E, the E is a positive integer, so The element X 5 (q) in [X 5 (q)] is X 6 ((q+MP)mod M), and the X 6 ( (q+MP)mod M) 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,...,M-1}, The q belongs to {0,...,Q-1};

The processing module is used to obtain the [s(m)] from the first signal.
The device according to claim 70, characterized in that:

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 device according to claim 70 or 71, characterized in that the P is determined according to the M, including: the P is determined according to the M and the E.
The device according to claim 72, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4+E-1)/2 A definite integer.
The device according to any one of claims 70 to 73, wherein 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 5 (q)].
The device according to any one of claims 70 to 73, wherein 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.
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the transceiver module is used to receive a first signal, the first signal is a signal generated based on [X 8 (m)], and the [X 8 (m)] is generated based on 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)] is 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 a pair 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 is used to obtain the [s(m)] from the first signal.
The device according to claim 76, characterized in that:

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 device according to claim 76 or 77, characterized in that the modulation method of [s(m)] is four-phase phase shift keying QPSK, and the P is based on (±M/4-1)/2 A definite integer.
The device according to any one of claims 76 to 78, characterized in that 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 8 (m)].
The device according to any one of claims 76 to 78, characterized in that 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)], and the [X 9 (m)] is composed of M elements;

The [X 9 (m)] is the M symbols obtained by filtering the [X 8 (m)].
A communication system, characterized in that it includes a communication device that performs the method according to any one of claims 41 to 49 and/or a communication device that performs the method according to any one of claims 61 to 69; or includes A communication device that performs the method according to any one of claims 50 to 55 and/or a communication device that performs the method according to any one of claims 70 to 75; or includes performing any one of the methods according to claims 56 to 60 A communication device for performing the method according to claim 76 and/or a communication device for performing the method according to any one of claims 76 to 80.
A communication device, characterized by comprising a processor and a memory; wherein the memory is used to store one or more computer programs or instructions, and the processor is used to execute the one or more computers stored in the memory. Programs or instructions to cause the communication device to perform the method according to any one of claims 1 to 9, or the method according to any one of claims 10 to 15, or any one of claims 16 to 20 The method described in any one of claims 21 to 29, or the method described in any one of claims 30 to 35, or the method described in any one of claims 36 to 40 .
A computer-readable storage medium, characterized in that computer programs or instructions are stored, and the computer programs or instructions are used to implement the method of any one of claims 1 to 9, or any of claims 10 to 15. The method described in any one of claims 16 to 20, or the method described in any one of claims 21 to 29, or the method described in any one of claims 30 to 35 Method, or the method of any one of claims 36 to 40.
A computer program product, characterized in that the computer program product includes a computer program, which when the computer program is run on a computer, causes the computer to perform the method according to any one of claims 1 to 9, Or the method described in any one of claims 10 to 15, or the method described in any one of claims 16 to 20, or the method described in any one of claims 21 to 29, or claims 30 to 20 The method of any one of claims 35, or the method of any one of claims 36 to 40.
A chip system, characterized in that the chip system is used to execute the method as claimed in any one of claims 1 to 9, or to execute the method as claimed in any one of claims 10 to 15, or to execute the method as claimed in any one of claims 10 to 15. The method of any one of claims 16 to 20, or performing the method of any one of claims 21 to 29, or performing the method of any one of claims 30 to 35, or performing claim 36 The method described in any one of to 40.