WO2024041269A1 - Communication method and apparatus - Google Patents

Abstract

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus, which can realize flexible extension of a tone reservation (TR) sequence and reduce the storage overhead of the TR sequence. The method comprises: a first device extending M times elements in a first TR sequence having a length of N, so as to obtain a second TR sequence, wherein N and M are integers greater than 0; performing M shifts on the second TR sequence according to M shift values, so as to obtain M third TR sequences, wherein among the M shift values, the difference between two shift values with similar values is K, K is an integer greater than 0, and K and M do not have a common divisor greater than 1; determining a fourth TR sequence having a length of M*N according to the M third TR sequences; and sending a signal to a second device according to the fourth TR sequence.

Description

A communication method and device

Cross-references to related applications

This application claims priority to the Chinese patent application submitted to the China Patent Office on August 26, 2022, with application number 202211031441.9 and application title "A communication method and device", the entire content of which is incorporated into this application by reference.

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) waveform has good resistance to frequency selective fading and is widely used in communication systems. It is also the fifth generation mobile communication (5th generation, 5G) new air interface. One of the waveforms in the (new radio, NR) standard. However, the OFDM waveform has a high peak to average power ratio (PAPR), and the nonlinear power amplifier at the transmitter will cause nonlinear distortion of the high PAPR signal, thus affecting the reception performance. Especially for long-distance communication systems such as satellite communications, the need to reduce the PAPR of signals, increase signal transmission power, and improve power amplifier efficiency is even more urgent.

Carrier reservation (tone reservation, TR) technology can be used to suppress PAPR, that is, the transmitter reserves some subcarriers to carry signals that suppress PAPR. When TR technology is used to reduce PAPR, the receiving end needs to know the location of the subcarriers reserved by the transmitting end in order to correctly demodulate the useful signal. In order to efficiently indicate the location of reserved subcarriers, standards usually introduce a TR sequence to indicate the location of reserved subcarriers. The TR sequence is related to the number of inverse discrete fourier transform (IDFT) points corresponding to the signal, that is, different IDFT points need to be configured with different TR sequences to ensure PAPR suppression performance. However, if TR sequences are introduced separately for different IDFT points, it will cause large storage overhead and be difficult to flexibly expand.

Contents of the invention

Embodiments of the present application provide a communication method and device, which can realize flexible expansion of TR sequences and reduce the storage overhead of TR sequences.

In the first aspect, embodiments of the present application provide a communication method, which can be executed by a first device, or by a component of the first device (such as a processor, a chip, or a chip system, etc.), or can be implemented by Logic modules or software implementation of all or part of the first device functions. The first device may be a terminal device, a network device, etc. The following description takes the first device executing this method as an example. The method includes:

The first device expands the elements in the first TR sequence of length N by M times to obtain a second TR sequence, where N and M are integers greater than 0; the second TR sequence is shifted M times based on M shift values. bit, obtain M third TR sequences, among which among the M shift values, the difference between two shift values with similar values is K, K is an integer greater than 0, and K and M do not exist greater than 1 common divisor; determine a fourth TR sequence with a length of M*N based on the M third TR sequences; send a signal to the second device based on the fourth TR sequence.

It should be understood that the first device can perform resource mapping on the data (or data signal) to be sent according to the subcarrier position corresponding to the fourth TR sequence to obtain a frequency domain signal, that is, map (or insert) the data into a frequency domain signal except for the fourth TR sequence. For subcarrier positions other than the corresponding subcarrier position, the amplitude of the subcarrier position corresponding to the fourth TR sequence is interpolated to 0 to obtain a frequency domain signal. After the frequency domain signal is transformed by IDFT, the time domain signal can be obtained, that is, it needs to be transferred to the second device signal sent.

Using the above method, the original first TR sequence can be flexibly expanded to different lengths to adapt to the need to reduce PAPR for signals with different IDFT points, and there is no need to introduce TR sequences for different IDFT points separately, which can reduce the storage overhead of the TR sequence. .

In a possible design, the first device sends a signal to the second device according to the fourth TR sequence, including: the first device determines the TR frequency domain signal according to the fourth TR sequence and the number of subcarriers corresponding to the signal, where , in the TR frequency domain signal, the amplitude of the subcarrier position corresponding to the fourth TR sequence is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0; perform IDFT processing on the TR frequency domain signal to determine the time domain kernel signal; perform peak clipping processing on the signal according to the time domain kernel signal; and send the peak clipped signal to the second device. Optionally, before performing IDFT processing on the TR frequency domain signal, the method further includes: weighting the TR frequency domain signal through a window function of length M.

In the above design, before performing IDFT processing on the TR frequency domain signal, the first device can also process the TR frequency domain signal through a window function of length M. Weighted processing of TR frequency domain signals can generate time domain kernel signals with different time domain characteristics to achieve different peak clipping effects.

In a possible design, when M is 2, M shift values include: 0, -1; or, 0, +1; when M is 3, M shift values include: 0, -1, +1.

In a possible design, the method further includes: the first device determines the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, the largest element and the smallest element in the first TR sequence. At least one of the differences in elements determines M.

In the above design, the first device can determine the length of the TR sequence required to perform PAPR reduction processing on the signal based on the number of IDFT points corresponding to the signal, and can determine the length of the TR sequence required for PAPR reduction processing based on the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, At least one of the differences between the largest element and the smallest element in the first TR sequence reflects the length of the first TR sequence to determine the multiple M that needs to be extended to the first TR sequence, which is conducive to achieving better PAPR reduction. Effect.

In a possible design, the method further includes: the first device sending M shift values and/or M to the second device.

In the above design, the first device can send M shift values and/or M to the second device, which is beneficial to reducing the processing overhead of the second device in determining M shift values and/or extending the first TR sequence by a multiple M .

In a possible design, the method further includes: the first device receiving M shift values and/or M from the second device.

In the above design, the first device can obtain M shift values from the second device and/or extend the first TR sequence by a multiple of M, which is beneficial to reducing the time required for the first device to determine M shift values and/or The processing overhead of a multiple M of TR sequence expansion.

In a possible design, the method further includes: the first device sending N to the second device; or receiving N from the second device.

In the above design, the first device or the second device can determine the length N of the original first TR sequence and then send it to the other party, which is conducive to the first device and the second device aligning their understanding of the length of the original first TR sequence, based on The original first TR sequence accurately implements signal processing.

In the second aspect, embodiments of the present application provide a communication method, which can be executed by a second device, or by a component of the second device (such as a processor, a chip, or a chip system, etc.), or can be implemented by Logic modules or software implementation of all or part of the second device functions. The second device may be a network device, a terminal device, etc. The following description takes the second device executing this method as an example. The method includes:

The second device expands the elements in the first TR sequence of length N by M times to obtain a second TR sequence, where N and M are integers greater than 0; the second TR sequence is shifted M times based on M shift values. bit, obtain M third TR sequences, among which among the M shift values, the difference between two shift values with similar values is K, K is an integer greater than 0, and K and M do not exist greater than 1 common divisor; determine a fourth TR sequence with a length of M*N based on the M third TR sequences; demodulate the signal from the first device according to the fourth TR sequence.

In a possible design, when M is 2, M shift values include: 0, -1; or, 0, +1; when M is 3, M shift values include: 0, -1, +1.

In a possible design, the method further includes: the second device receives M shift values and/or M from the first device.

In a possible design, the method further includes: the second device determines the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, the largest element and the smallest element in the first TR sequence. At least one of the differences in elements determines M.

In a possible design, the method further includes: the second device sends M shift values and/or M to the first device.

In a possible design, the method further includes: the second device receiving N from the first device; or sending N to the first device.

In a third aspect, embodiments of the present application provide a communication device, which has the function of implementing the method in the first aspect. The function can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, such as an interface unit and a processing unit.

In one possible design, the device may be a chip or integrated circuit.

In one possible design, the device includes a memory and a processor. The memory is used to store instructions executed by the processor. When the instructions are executed by the processor, the device can perform the method of the first aspect.

In a possible design, the device may be a first device, such as a terminal device, a network device, etc.

In the fourth aspect, embodiments of the present application provide a communication device, which has the function of implementing the method in the second aspect. The function can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, such as an interface unit and a processing unit.

In one possible design, the device may be a chip or integrated circuit.

In one possible design, the device includes a memory and a processor. The memory is used to store instructions executed by the processor. When the instructions are executed by the processor, the device can perform the method of the second aspect.

In a possible design, the device may be a second device, such as a network device, a terminal device, etc.

In a fifth aspect, embodiments of the present application provide a communication device. The communication device includes an interface circuit and a processor, and the processor and the interface circuit are coupled to each other. The processor is used to implement the method of the first aspect above through logic circuits or executing instructions. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to send signals from the processor to other communication devices other than the communication device. It can be understood that the interface circuit may be a transceiver or a transceiver or a transceiver or an input-output interface.

Optionally, the communication device may also include a memory for storing instructions executed by the processor or input data required for the processor to run the instructions or data generated after the processor executes the instructions. The memory can be a physically separate unit, or it can be coupled to the processor, or the processor can include the memory.

In a sixth aspect, embodiments of the present application provide a communication device. The communication device includes an interface circuit and a processor, and the processor and the interface circuit are coupled to each other. The processor is used to implement the method of the second aspect above through logic circuits or executing instructions. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to send signals from the processor to other communication devices other than the communication device. It can be understood that the interface circuit may be a transceiver or a transceiver or a transceiver or an input-output interface.

Optionally, the communication device may also include a memory for storing instructions executed by the processor or input data required for the processor to execute the instructions or data generated after the processor executes the instructions. The memory can be a physically separate unit, or it can be coupled to the processor, or the processor can include the memory.

In a seventh aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored. When the computer program or instructions are executed, the method of the first aspect or the second aspect can be implemented. For example, the computer may be a terminal device or a network device.

In an eighth aspect, embodiments of the present application further provide a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed, the method of the first aspect or the second aspect can be implemented.

In a ninth aspect, embodiments of the present application further provide a chip, which is coupled to a memory and used to read and execute programs or instructions stored in the memory to implement the method of the first aspect or the second aspect.

In a tenth aspect, embodiments of the present application further provide a communication system. The communication system includes a first device and a second device. The first device can implement the method of the first aspect, and the second device can implement the method of the second aspect. .

For the technical effects that can be achieved in the above-mentioned second aspect to the tenth aspect, please refer to the technical effects that can be achieved in the above-mentioned first aspect, and will not be repeated here.

Description of drawings

Figure 1 is a schematic diagram of the network architecture of a communication system provided by an embodiment of the present application;

Figure 2 is a signal processing block diagram of a transceiver end using TR to reduce PAPR provided by an embodiment of the present application;

Figure 3 is one of the schematic diagrams of the communication method provided by the embodiment of the present application;

Figure 4 is one of the schematic diagrams of the time domain kernel characteristics of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 5 is a schematic diagram of the PAPR inhibition performance of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 6 is a second schematic diagram of the time domain kernel characteristics of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 7 is the third schematic diagram of the time domain kernel characteristics of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 8 is the fourth schematic diagram of the time domain kernel characteristics of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 9 is the fifth schematic diagram of the time domain kernel characteristics of the first TR sequence and the fourth TR sequence provided by the embodiment of the present application;

Figure 10 is a second schematic diagram of the communication method provided by the 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 a second schematic diagram of a communication device provided by an embodiment of the present application.

Detailed ways

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 5G systems, non-terrestrial network (NTN) systems, global system of mobile communications (GSM) systems, enhanced Data rate GSM evolution (enhanced data rate for GSM evolution, EDGE) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, code division multiple access (CDMA) 2000 system, time division-synchronization code division multiple access (TD-SCDMA) system, long term evolution (long term evolution (LTE) system, narrowband internet of things (NB-IoT) system, satellite communication system, etc., and can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) communication system, etc. Specifically, for 5G systems, it can be applied to enhanced mobile broadband (eMBB) systems, low-latency and high-reliability communication (URLLC) systems, and massive machine-type communications (massive machine communications) in 5G systems. machine type of communication, eMTC) system, etc.

Figure 1 is a schematic diagram of the network architecture of a communication system applicable to the embodiment of the present application. The communication system may comprise a network device and two terminal devices (terminal device A and terminal device B), which may be mobile terminal devices and/or any other suitable device for communicating on a wireless communication system, and All can be connected to network devices. Both end devices are capable of communicating with network devices. It should be understood that Figure 1 is only a schematic diagram, and the communication system may include a larger or smaller number of network devices or terminal devices, and may also include other devices. For example, the communication system may also include a wireless relay device and a wireless backhaul device (not shown in Figure 1). In addition, the terminal device in Figure 1 is also a schematic. For example, the terminal device can also be an IoT device such as a smart water meter.

The above-mentioned network equipment can also be called access network (AN) equipment, or radio access network (RAN) equipment. It is a type of equipment that can be deployed in a wireless access network to provide wireless communication for terminal equipment. Functional device or equipment. For example, the network device can be a base station (base station, BS), node B (Node B), evolved base station (evolved NodeB, eNodeB), transmission reception point (transmission reception point, TRP), satellite, high-altitude platform or high-altitude platform station (high-attitude platform station, HAPS), the next generation base station (next generation NodeB, gNB) in the 5G system, the base station in the 6G system, the base station in other future mobile communication systems, etc.; it can also complete some functions of the base station A module or unit, 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 equipment can be a macro base station, a micro base station or an indoor station, or a relay station (or relay node), a donor node or an access point, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment. It can be understood that all or part of the functions of the network device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

In addition, the network equipment can include a baseband unit (BBU) and a remote radio unit (RRU). The RRU and the BBU are respectively responsible for the radio frequency processing part and the baseband processing part of the network equipment. The difference between the BBU and the RRU is Optical fiber transmission can be used to achieve remote RRU. For example, the RRU can be placed in an area with high traffic volume, and the BBU can be placed in the central computer room. Of course, the BBU and RRU can also be placed in the same computer room or as different components under the same rack.

Terminal equipment can also be called terminal, user equipment (UE), mobile station (MS), mobile terminal, etc. It is a device or equipment with wireless communication functions. Terminal devices can be widely used in various scenarios, such as MTC, Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables , intelligent transportation, smart cities, etc. The terminal device can be a subscriber unit (subscriber unit), cellular phone (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (personal digital assistant, PDA) computer, tablet computer, wireless modem (modem), Handheld devices, laptop computers, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, MTC equipment, ground stations, etc. 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.

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. For example, the above-mentioned devices can communicate through spectrum below 6 gigahertz (GHz), they can also communicate through spectrum above 6 GHz, or they can communicate using spectrum below 6 GHz and spectrum above 6 GHz 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.

Figure 2 is a signal processing block diagram of the transceiver using TR to reduce PAPR. As shown in Figure 2, the transmitter performs resource mapping on the channel-coded and modulated data signal according to the reserved subcarrier position to obtain the frequency domain signal, which is the useful data mapping. To the data subcarrier position, the amplitude of the reserved subcarrier position is interpolated to 0, the frequency domain signal is generated by IDFT to generate an OFDM signal, and then the TR reduction PAPR operation is performed. The principle of PAPR reduction by TR is to use reserved subcarriers to generate a time domain kernel signal. According to the power peak of the OFDM signal to be reduced by PAPR, the time domain kernel signal is multiplied by a coefficient and shifted, and subtracted from the OFDM signal. Peak clipping is performed to reduce the PAPR of the OFDM signal through multiple rounds of iteration. The OFDM signal processed by PAPR reduction is inserted into a cyclic prefix (CP) and then transmitted through the channel and received by the receiving end.

The receiving end performs CP removal, discrete fourier transform (DFT), and channel estimation compensation on the received OFDM signal to obtain the frequency domain signal. It only needs to know the position of the data subcarrier/reserved subcarrier. The useful frequency domain signal (signal located at the position of the data subcarrier) can be reversely mapped and demodulated without paying attention to the signal at the reserved subcarrier position. The data signal obtained after demodulation can be channel decoded. Get useful data.

When TR technology is used to reduce PAPR, the transmitter and receiver need to know the location of the reserved subcarriers in order to correctly demodulate useful frequency domain signals. In order to efficiently indicate the location of reserved subcarriers, standards usually introduce a TR sequence to indicate the location of reserved subcarriers. The TR sequence is related to the number of IDFT points corresponding to the signal, that is, different IDFT points need to be configured with different TR sequences to ensure PAPR suppression performance. However, if TR sequences are introduced separately for different IDFT points, it will cause large storage overhead and be difficult to flexibly expand.

Based on this, the present application aims to provide a communication method and device, in order to achieve flexible expansion of TR sequences and reduce the storage overhead of TR sequences. The embodiments of the present application will be described in detail below with reference to the accompanying drawings, where dotted lines in the drawings represent optional steps or components.

In addition, it should be understood that the ordinal words such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, etc. of multiple objects. Priority or importance, etc. For example, the first TR sequence and the second TR sequence do not indicate the difference in priority or importance corresponding to the two TR sequences.

In the embodiments of this application, the number of nouns means "singular noun or plural noun", that is, "one or more", unless otherwise specified. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. For example, A/B means: A or B. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c Can be single or multiple.

Figure 3 is a schematic diagram of a communication method provided by an embodiment of the present application. In Figure 3, the first device and the second device are used as execution subjects to schematically illustrate the method. The first device may be a terminal device and the second device may be a network device; or the first device may be a network device and the second device may be a terminal device and so on. This application does not limit the execution subject of this method. For example, the first device in Figure 3 can also be a chip, chip system, or processor that can support the first device to implement the method, or can also be a device that can implement all or part of the method. The logic module or software of the first device function; the second device in Figure 3 can also be a chip, chip system, or processor that supports the second device to implement the method, or can realize all or part of the second device functions. logic modules or software. The method includes:

S301: The first device expands the elements in the first TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers.

In this embodiment of the present application, a first TR sequence of length N (that is, containing N elements) may be pre-configured in the first device and the second device, that is, an original TR sequence of length N may be pre-configured. The TR sequences subsequently used by the first device and the second device can be obtained based on the expansion of the first TR sequence. The first TR sequence can be predefined through a protocol, etc., and configured in the first device and the second device; it can also be determined by the first device and then sent to the second device, or it can be determined by the second device and then sent to the first device. device; the first device may also determine the length N of the first TR sequence and then send it to the second device, or the second device may determine the length N of the first TR sequence and then send it to the first device. The first device and the second device The same generation method is used to obtain the first TR sequence of length N. This application does not limit the specific method by which the first device and the second device obtain the first TR sequence.

The length of the TR sequence used to perform PAPR reduction processing on signals (such as OFDM signals) is related to the number of IDFT points corresponding to the signal. Different IDFT points correspond to TR sequences of different lengths to ensure PAPR suppression performance. The number of IDFT points corresponding to the signal can be determined based on the carrier bandwidth and sub-carrier space (SCS) of the transmitted signal. For example, the carrier bandwidth of the transmitted signal is 50MHz (i.e. 50000KHz) and the SCS is 120KHz. The value of 50000KHz/120KHz is approximately equal to 417, and the smallest integer power of 2 greater than 417 is 512, then it can be determined that the number of IDFT points corresponding to this signal is 512. Therefore, it can also be said that the length of the TR sequence that performs PAPR reduction processing on the signal is related to the carrier bandwidth, SCS, and number of subcarriers (that is, the ratio of the carrier bandwidth to the SCS) corresponding to the signal.

Table 1 shows a mapping relationship between the carrier bandwidth, SCS and the length L of the TR sequence. As shown in Table 1, when the carrier bandwidth is 50 megahertz (MHz) and SCS = 120 kilohertz (KHz), The length L of the corresponding TR sequence is 12; when the carrier bandwidth is 100MHz and SCS=120KHz, the length L of the corresponding TR sequence is 24; ...; when the carrier bandwidth is 100MHz and SCS=60KHz, the length L of the corresponding TR sequence is The length L is 48.

Table 1

After determining the length L of the TR sequence used for down-PAPR processing of the signal, the first device may determine the multiple M that needs to be extended to the elements in the first TR sequence based on the ratio of L and N. In addition, due to the number of IDFT points corresponding to the first TR sequence, the difference between the largest element and the smallest element in the first TR sequence (for example, the largest element in the first TR sequence is 400, or the difference between the largest element and the smallest element in the first TR sequence The value is 399, and the smallest integer power of 2 greater than 399 or 400 is 512, then it can be determined that the IDFT point corresponding to the first TR sequence is 512), etc. One or more of the above can also reflect the first TR sequence The length N, the number of IDFT points corresponding to the signal can also reflect the length L of the TR sequence used to perform PAPR reduction processing on the signal. In the embodiment of the present application, one or more of the IDFT points corresponding to the first TR sequence, the difference between the largest element and the smallest element in the first TR sequence, the length N of the first sequence, and the signal correspondence One or more of the number of IDFT points and the length L of the TR sequence that performs PAPR down processing on the signal is used to determine the multiple M that needs to be extended to the elements in the first TR sequence. For example, based on the ratio of the number of IDFT points corresponding to the signal and the number of IDFT points corresponding to the first TR sequence, the multiple M that needs to be expanded to the elements in the first TR sequence is determined.

The first device can expand the elements in the first TR sequence of length N by M times according to the required expansion multiple M times to obtain the second TR sequence. As an example: the first TR sequence S1=[s(0), s(1),...,s(N-1)], M is 2, then the second sequence S2=2·S1=[2·s (0), 2·s(1),…,2·s(N-1)]. For example: the element s(0) in the first TR sequence is 5, then 2·s(0) is 10 after the element is expanded M (M=2) times.

S302: The first device shifts the second TR sequence M times according to M shift values to obtain M third TR sequences.

Among the M shift values, the difference between two shift values with similar values is K, K is an integer greater than 0, and K and M do not have a common divisor greater than 1; that is, M shifts The values must be sorted from small to large. The difference between any two adjacent shift values is K. K is an integer greater than 0. There is no common divisor between K and M greater than 1.

Taking M as 2 as an example, then K can be 1, 3, 5, 7, 9, etc. as a value that does not have a common divisor greater than 1 with 2; taking M as 3 as an example, then K can be 1, 2, 4, 5, 7, 8, etc. and 3 do not have a common divisor value greater than 1. For example: when M is 2 and K is 1, the M shift values can be 0, -1; or 0, +1, etc.; when M is 3 and K is 1, the M shift values Values can be 0, -1, +1.

Taking M as 2 and M shift values as 0 and -1, the second TR sequence S2=2·S1=[2·s(0), 2·s(1),…, 2·s(N-1 )] as an example, then the third TR sequence S31=S2=[2·s(0), 2·s(1),..., 2·s(N-1)] corresponding to the shift value 0, corresponding to the shift The third TR sequence S32 with value -1=S2-1=[2·s(0)-1, 2·s(1)-1, ..., 2·s(N-1)-1].

Taking M as 3 and M shift values as 0, -1, +1, the second TR sequence S2=3·S1=[3·s(0), 3·s(1),...,3·s( N-1)] as an example, then the third TR sequence S31=S2=[3·s(0), 3·s(1),..., 3·s(N-1)] corresponding to the shift value 0, The third TR sequence S32=S2-1=[3·s(0)-1, 3·s(1)-1,..., 3·s(N-1)-1] corresponding to the shift value -1, The third TR sequence S32 corresponding to the shift value 1=S2+1=[3·s(0)+1, 3·s(1)+1, ..., 3·s(N-1)+1].

S303: The first device determines a fourth TR sequence with a length of M*N based on M third TR sequences.

In one implementation, the first device combines the obtained M third TR sequences to obtain a fourth TR with a length of M*N. sequence.

Taking M as 2 and M shift values as 0 and -1, the third TR sequence S31=S2=[2·s(0), 2·s(1),..., 2s(N) corresponding to the shift value 0 -1)], corresponding to the third TR sequence S32=S2-1=[2·s(0)-1, 2·s(1)-1,..., 2·s(N-1) with shift value -1 )-1] as an example, the obtained fourth TR sequence S4 with length M*N = [2·s(0)-1, 2·s(0), 2·s(1)-1, 2· s(1),…,2·s(N-1)-1,2s(N-1)].

S304: The first device sends a signal to the second device according to the fourth TR sequence. Accordingly, the second device receives the signal.

After the first device determines the fourth TR sequence, it can perform PAPR reduction processing on the signal that needs to be sent to the second device according to the fourth TR sequence, and send the signal that has undergone PAPR reduction processing to the second device.

In one implementation, the first device can determine the TR frequency domain signal based on the fourth TR sequence and the number of subcarriers corresponding to the signal to be sent to the second device, and perform IDFT processing on the determined TR frequency domain signal. , determine the time domain kernel signal. Among them, the amplitude of the subcarrier position corresponding to the fourth TR sequence in the TR frequency domain signal is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0. Taking Z as 1 and the fourth TR sequence S4 = [1, 2, 11, 12, ..., 101, 102] as an example, then the TR frequency domain signal has subcarriers 1, 2, 11, 12, ..., 101, 102 The amplitude of the position is 1, and the amplitude of other subcarrier positions in the TR frequency domain signal is 0. Specifically, the amplitude of the subcarrier position is Z, which can be understood as the power of the subcarrier position is a+bi, i is an imaginary unit, sqrt(a^2+b^2)=Z.

After obtaining the time domain kernel signal, the first device can perform peak clipping processing on the signal that needs to be sent to the second device according to the time domain kernel signal. For example, the first device can multiply and shift the time domain kernel signal by a coefficient based on the power peak of the signal to be reduced by PAPR, and subtract the signal from the signal to be reduced by PAPR to perform peak clipping, and reduce the PAPR of the signal through multiple rounds of iterations.

Take M as 2, the length of the first TR sequence as N as 24, and the length of the fourth TR sequence as M*N as 48 as an example. The time domain kernel characteristics of the first TR sequence and the fourth TR sequence are shown in Figure 4. The horizontal axis in Figure 4 represents the sampling point (corresponding to the subcarrier position in the TR frequency domain signal generated based on the TR sequence), and the vertical axis represents the amplitude. It can be seen that compared with the first TR sequence, the fourth TR sequence has Better time domain characteristics, that is, the amplitude of the time domain part outside the peak value can be suppressed lower.

Figure 5 is a schematic diagram of the PAPR suppression performance of the first TR sequence and the fourth TR sequence shown in Figure 4, in which the horizontal axis represents PAPR, and the vertical axis represents the probability that the PAPR of the signal is greater than the PAPR of the horizontal axis. It can be seen from Figure 5 that the PAPR-reduced signal through the fourth TR sequence has a lower PAPR than the PAPR-reduced signal through the first TR sequence.

Taking M as 3, the length N of the first TR sequence as 12, and the length M*N of the fourth TR sequence as 36 as an example, the time domain kernel characteristics of the first TR sequence and the fourth TR sequence are shown in Figure 6. The horizontal axis in Figure 6 represents the sampling point (corresponding to the subcarrier position in the TR frequency domain signal generated based on the TR sequence), and the vertical axis represents the amplitude. It can be seen that compared with the first TR sequence, the fourth TR sequence is also It has better time domain characteristics, that is, the amplitude of the time domain part outside the peak value can be suppressed lower.

S305: The second device demodulates the signal from the first device according to the fourth TR sequence.

When the second device receives the signal from the first device, it can determine the reserved subcarrier position in the signal according to the fourth TR sequence, and perform resource inverse mapping and demodulation on the signal at the non-reserved subcarrier position to obtain useful The data.

For the implementation of the second device determining the M, M shift values and the fourth TR sequence, reference may be made to the implementation of the first device determining the M, M shift values and the fourth TR sequence, which will not be described again.

In some implementations, in order to save processing resources of the second device, after determining M and/or M shift values, the first device may send M and/or M shift values to the second device. Take the first device sending M shift values to the second device as an example. After the second device receives the M shift values, it can determine the elements in the first TR sequence based on the number of received shift values. The expansion multiple M, and the M shift values of the second TR sequence obtained by expanding the elements in the first TR sequence M times and performing M shifts.

Usually, both the first device and the second device that transmit and receive signals can learn the parameters corresponding to the signal, such as the corresponding IDFT points, the length of the TR sequence corresponding to the reduced PAPR, and other information. In other implementations, the second device can also After M and/or M shift values are determined, M and/or M shift values are sent to the first device to save processing resources of the first device. Taking the first device sending M to the second device as an example, after the second device receives M, it can determine the multiple M by which the elements in the first TR sequence are expanded. And according to the same strategy used by the second device to determine M shift values, such as the preset mapping relationship between expansion multiples and shift values, etc., based on M, the elements in the first TR sequence can be determined by M times. The second TR sequence is shifted M times by M shift values.

In some implementations, in order to meet different peak clipping processing effect requirements, before IDFT processing is performed on the TR frequency domain signal, the TR frequency domain signal can also be weighted through a window function of length M to generate time signals with different characteristics. Domain kernel signal to achieve different peak clipping processing effects.

Take M as 3, M shift values as 0, -1, +1 respectively, and the coefficients of the window function with length M as [1/2, 1, 1/2] as an example. As shown in Figure 7, it is a schematic diagram of the TR frequency domain signal determined based on the first TR sequence and the fourth TR sequence respectively, in which each dot in the horizontal axis Indicates a subcarrier position of the TR frequency domain signal. The non-arrow position indicates the amplitude of the subcarrier position is 0, the short arrow indicates the amplitude of the subcarrier position is 1/2Z, and the long arrow indicates the amplitude of the subcarrier position is Z. . It can be seen from Figure 7 that by weighting the TR frequency domain signal with a window function of length M, TR frequency domain signals with different amplitudes can be obtained.

Still taking M as 3, the length of the first TR sequence as N as 12, and the length of the fourth TR sequence as M*N as 36 as an example, the time domain kernel characteristics of the first and fourth TR sequences (through coefficients are [1/ 2, 1, 1/2] window function weighting processing) as shown in Figure 8. The horizontal axis in Figure 8 represents the sampling point (corresponding to the subcarrier position in the TR frequency domain signal generated based on the TR sequence), and the vertical axis represents the amplitude. It can be seen that compared with the first TR sequence, the fourth TR sequence has Better time domain characteristics, that is, the amplitude of the time domain part outside the peak value can be suppressed lower; and in Figure 8, it is weighted by a window function with coefficients [1/2, 1, 1/2] There are differences in the time domain kernel characteristics of the fourth TR sequence compared to the time domain kernel characteristics of the fourth TR sequence in Figure 6 that have not been weighted by the window function with coefficients [1/2, 1, 1/2], and can achieve different The peak clipping effect.

In addition, it should be understood that in the embodiment of the present application, under the same expansion factor M, different time domain kernel characteristics can also be obtained by changing M shift values to achieve different peak clipping processing effects.

Still taking M as 2 and the two shift values as L and L+2k+1 respectively, where L and k are integers as an example, the time domain kernel characteristics of the first TR sequence and the fourth TR sequence corresponding to different shift values are As shown in Figure 9. The horizontal axis in Figure 9 represents the sampling point (corresponding to the subcarrier position in the TR frequency domain signal generated based on the TR sequence), and the vertical axis represents the amplitude. It can be seen that the two shifts corresponding to L=0 and K=0 The fourth TR sequence of the value, and the fourth TR sequence time domain kernel time domain characteristics of the two shift values corresponding to L=0 and K=1 are slightly different, but compared with the first TR sequence time domain kernel time domain Characteristics have been improved.

In the implementation of Figure 3 above, the TR sequence (that is, the reserved subcarrier position in the TR frequency domain signal) is expanded by M times by combining the TR sequences obtained by the M shifts by M times. In some implementations, the reserved subcarrier positions in the TR frequency domain signal can be expanded by M times by using a window function of length M to perform convolution processing on the TR frequency domain signal determined based on the TR sequence.

Figure 10 is a schematic diagram of another communication method provided by an embodiment of the present application. The method includes:

S1001: The first device expands the elements in the first TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers.

S1002: The first device determines the first TR frequency domain signal based on the second TR sequence and the number of subcarriers corresponding to the signal. In the first TR frequency domain signal, the amplitude of the subcarrier position corresponding to the second TR sequence is The value is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0.

S1003: The first device performs convolution processing on the first TR frequency domain signal based on a window function of length M to obtain a second TR frequency domain signal.

S1004: The first device sends a signal to the second device according to the second TR frequency domain signal. Accordingly, the second device receives the signal.

S1005: The second device demodulates the signal from the first device according to the second TR frequency domain signal.

For the above S1001, reference may be made to the implementation of the above S301, which will not be described again. The difference between the implementation of the above S1002-S1004 and the above-mentioned S302-S304 is that the first device first generates the first TR frequency domain signal based on the second TR sequence whose elements are expanded M times, and passes a window function of length M, for example, the coefficient is The window function of [1/2, 1, 1/2] performs convolution processing on the first TR frequency domain signal to obtain the second TR frequency domain signal used for PAPR processing, and the signal is processed by the second TR frequency domain signal. Perform PAPR reduction processing. For example, IDFT processing is performed on the second TR frequency domain signal to determine the time domain kernel signal, and the PAPR reduction process is performed on the signal that needs to be sent to the second device through the time domain kernel signal.

The difference between S1005 and S305 is that the second device determines the reserved subcarrier position in the signal based on the second TR frequency domain signal, and performs resource inverse mapping and demodulation on the signal at the non-reserved subcarrier position to obtain useful data. . Specifically, it can be determined whether the position of the subcarrier is a reserved subcarrier position according to whether the amplitude of each corresponding subcarrier position in the second TR frequency domain signal is 0. If it is non-zero, it is a reserved subcarrier position.

It can be understood that, in order to implement the functions in the above embodiments, the first device and the second device include corresponding hardware structures and/or software modules for performing respective functions. 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. These communication devices can be used to implement the functions of the first device or the second device in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In a possible implementation, the communication device may be a first device or a second device, or may be a module applied to the first device or the second device. (such as chips).

As shown in Figure 11, the communication device 1100 includes a processing unit 1110 and an interface unit 1120, where the interface unit 1120 may also be a transceiver unit or an input/output interface. The communication device 1100 may be used to implement the functions of the first device or the second device in the method embodiment shown in FIG. 3 or FIG. 10 .

When the communication device 1100 is used to implement the functions of the first device in the method embodiment shown in Figure 3:

The processing unit 1110 is configured to expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0; The TR sequence is shifted M times to obtain M third TR sequences. Among the M shift values, the difference between two shift values with similar values is K. K is an integer greater than 0. K There is no common divisor greater than 1 with M; and based on the M third TR sequences, determine a fourth TR sequence with a length of M*N; the processing unit 1110 is also configured to send a request to the third TR sequence through the interface unit 1120 based on the fourth TR sequence. Two devices send signals.

In a possible design, when the processing unit 1110 sends a signal to the second device through the interface unit 1120 according to the fourth TR sequence, it is specifically configured to determine the TR frequency domain according to the fourth TR sequence and the number of subcarriers corresponding to the signal. signal, where, in the TR frequency domain signal, the amplitude of the subcarrier position corresponding to the fourth TR sequence is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0; perform discrete Fourier on the TR frequency domain signal Inverse leaf transform IDFT processing is performed to determine the time domain kernel signal; peak clipping processing is performed on the signal according to the time domain kernel signal; and the peak clipping processed signal is sent to the second device through the interface unit 1120.

In one possible design, before performing IDFT processing on the TR frequency domain signal, the processing unit 1110 is also configured to weight the TR frequency domain signal through a window function of length M.

In a possible design, when M is 2, M shift values include: 0, -1; or, 0, +1;

When M is 3, M shift values include: 0, -1, +1.

In one possible design, the processing unit 1110 is also configured to determine the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, the maximum element and the minimum element in the first TR sequence. At least one of the differences determines M.

In a possible design, the interface unit 1120 is also used to send M shift values and/or M to the second device.

In a possible design, the interface unit 1120 is also used to receive M shift values and/or M from the second device.

In a possible design, the interface unit 1120 is also used to send N to the second device; or to receive N from the second device.

When the communication device 1100 is used to implement the functions of the second device in the method embodiment shown in Figure 3:

The processing unit 1110 is configured to expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0; The TR sequence is shifted M times to obtain M third TR sequences. Among the M shift values, the difference between two shift values with similar values is K. K is an integer greater than 0. K There is no common divisor greater than 1 with M; and based on the M third TR sequences, determine a fourth TR sequence with a length of M*N; the processing unit 1110 is also configured to receive the demodulation interface unit 1120 according to the fourth TR sequence. of the signal from the first device.

In a possible design, when M is 2, M shift values include: 0, -1; or, 0, +1;

When M is 3, M shift values include: 0, -1, +1.

In a possible design, the interface unit 1120 is also configured to receive M shift values and/or M from the first device.

In one possible design, the processing unit 1110 is also configured to determine the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, the maximum element and the minimum element in the first TR sequence. At least one of the differences determines M.

In a possible design, the interface unit 1120 is also used to send M shift values and/or M to the first device.

In a possible design, the interface unit 1120 is also used to receive N from the first device; or to send N to the first device.

When the communication device 1100 is used to implement the functions of the first device in the method embodiment shown in Figure 10:

The processing unit 1110 is configured to expand the elements in the first TR sequence of length N by M times to obtain a second TR sequence, where N and M are integers; determine according to the second TR sequence and the number of subcarriers corresponding to the signal. A first TR frequency domain signal, wherein, in the first TR frequency domain signal, the amplitude of the subcarrier position corresponding to the second TR sequence is Z, the amplitudes of other subcarrier positions are 0, and Z is greater than 0; based on the length is a window function of M, performs convolution processing on the first TR frequency domain signal to obtain a second TR frequency domain signal; and sends a signal to the second device through the interface unit 1120 according to the second TR frequency domain signal.

When the communication device 1100 is used to implement the functions of the second device in the method embodiment shown in Figure 10:

The processing unit 1110 is configured to expand the elements in the first TR sequence of length N by M times to obtain a second TR sequence, where N and M are integers; determine according to the second TR sequence and the number of subcarriers corresponding to the signal. The first TR frequency domain signal, where, in the first TR frequency In the domain signal, the amplitude of the subcarrier position corresponding to the second TR sequence is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0; based on the window function of length M, the first TR frequency domain signal is Convolution processing is performed to obtain a second TR frequency domain signal; the processing unit 1110 is also configured to demodulate the signal from the first device received by the interface unit 1120 according to the second TR frequency domain signal.

As shown in Figure 12, this application also provides a communication device 1200, including a processor 1210 and an interface circuit 1220. The processor 1210 and the interface circuit 1220 are coupled to each other. It can be understood that the interface circuit 1220 can be a transceiver, an input-output interface, an input interface, an output interface, a communication interface, etc. Optionally, the communication device 1200 may also include a memory 1230 for storing instructions executed by the processor 1210 or input data required for the processor 1210 to run the instructions or data generated after the processor 1210 executes the instructions. Optionally, the memory 1230 can also be integrated with the processor 1210.

When the communication device 1200 is used to implement the method shown in Figure 3 or Figure 10, the processor 1210 can be used to implement the functions of the above-mentioned processing unit 1110, and the interface circuit 1220 can be used to implement the functions of the above-mentioned interface unit 1120.

It can be understood that the processor in the embodiment 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), logic circuit, 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.

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 computer-readable storage medium. For example, the computer program or instructions may be transmitted from a network device, terminal, A computer, server or data center transmits via wired or wireless means to another network device, terminal, 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.

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 (32)

1. A communication method, applied to a first device, characterized by including:

   Expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0;

   The second TR sequence is shifted M times according to M shift values to obtain M third TR sequences, wherein among the M shift values, the distance between two shift values with similar values is The difference is K, K is an integer greater than 0, and K and M do not have a common divisor greater than 1;

   According to the M third TR sequences, determine a fourth TR sequence with a length of M*N;

   A signal is sent to the second device according to the fourth TR sequence.
2. The method of claim 1, wherein sending a signal to the second device according to the fourth TR sequence includes:

   According to the number of subcarriers corresponding to the fourth TR sequence and the signal, a TR frequency domain signal is determined, wherein in the TR frequency domain signal, the amplitude of the subcarrier position corresponding to the fourth TR sequence is is Z, the amplitude of other subcarrier positions is 0, and Z is greater than 0;

   Perform inverse discrete Fourier transform IDFT processing on the TR frequency domain signal to determine the time domain kernel signal;

   According to the time domain kernel signal, perform peak clipping processing on the signal;

   Send the peak-clipping signal to the second device.
3. The method according to claim 2, characterized in that before performing IDFT processing on the TR frequency domain signal, the method further includes:

   The TR frequency domain signal is weighted through a window function of length M.
4. The method according to any one of claims 1 to 3, characterized in that when M is 2, the M shift values include: 0, -1; or, 0, +1;

   When M is 3, the M shift values include: 0, -1, and +1.
5. The method according to any one of claims 1-4, characterized in that the method further includes:

   According to the number of IDFT points corresponding to the signal, and at least one of the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, and the difference between the largest element and the smallest element in the first TR sequence. item, determine the M.
6. The method according to any one of claims 1-5, characterized in that the method further includes:

   Send the M shift values and/or the M to the second device.
7. The method according to any one of claims 1-4, characterized in that the method further includes:

   The M shift values and/or the M are received from the second device.
8. The method according to any one of claims 1-7, characterized in that the method further includes:

   Send the N to the second device; or,

   The N is received from the second device.
9. A communication method, applied to a second device, characterized by including:

   Expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0;

   The second TR sequence is shifted M times according to M shift values to obtain M third TR sequences, wherein among the M shift values, the distance between two shift values with similar values is The difference is K, K is an integer greater than 0, and K and M do not have a common divisor greater than 1;

   According to the M third TR sequences, determine a fourth TR sequence with a length of M*N;

   The signal from the first device is demodulated based on the fourth TR sequence.
10. The method of claim 9, wherein when M is 2, the M shift values include: 0, -1; or, 0, +1;

    When M is 3, the M shift values include: 0, -1, and +1.
11. The method according to claim 9 or 10, characterized in that the method further includes:

    The M shift values and/or the M are received from the first device.
12. The method according to claim 9 or 10, characterized in that the method further includes:

    According to the number of IDFT points corresponding to the signal, and at least one of the number of IDFT points corresponding to the first TR sequence, the length N of the first TR sequence, and the difference between the largest element and the smallest element in the first TR sequence. item, determine the M.
13. The method according to claim 9, 10 or 12, characterized in that the method further includes:

    The M shift values and/or the M are sent to the first device.
14. The method according to any one of claims 9-13, characterized in that the method further includes:

    receiving the N from the first device; or,

    Send the N to the first device.
15. A communication device, characterized by including an interface unit and a processing unit;

    The processing unit is used to expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0; The second TR sequence is shifted M times to obtain M third TR sequences, wherein among the M shift values, the difference between two shift values with similar values is K, and K is greater than An integer of 0, K and M do not have a common divisor greater than 1; and according to the M third TR sequences, determine a fourth TR sequence with a length of M*N;

    The processing unit is further configured to send a signal to the second device through the interface unit according to the fourth TR sequence.
16. The device of claim 15, wherein when the processing unit sends a signal to the second device through the interface unit according to the fourth TR sequence, it is specifically configured to use the fourth TR sequence and the The number of subcarriers corresponding to the above signal determines the TR frequency domain signal, wherein, in the TR frequency domain signal, the amplitude of the subcarrier position corresponding to the fourth TR sequence is Z, and the amplitudes of other subcarrier positions are The value is 0, and Z is greater than 0; perform inverse discrete Fourier transform IDFT processing on the TR frequency domain signal to determine the time domain kernel signal; perform peak clipping processing on the signal according to the time domain kernel signal; and The peak-clipping processed signal is sent to the second device through the interface unit.
17. The device according to claim 16, characterized in that, before performing IDFT processing on the TR frequency domain signal, the processing unit is also configured to perform weighting processing on the TR frequency domain signal through a window function of length M. .
18. The device according to any one of claims 15 to 17, wherein when M is 2, the M shift values include: 0, -1; or, 0, +1;

    When M is 3, the M shift values include: 0, -1, and +1.
19. The device according to any one of claims 15 to 18, characterized in that the processing unit is further configured to calculate the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, and the number of IDFT points corresponding to the first TR sequence. The M is determined by at least one of the length N of the first TR sequence and the difference between the largest element and the smallest element in the first TR sequence.
20. The device according to any one of claims 15 to 19, wherein the interface unit is further configured to send the M shift values and/or the M to the second device.
21. The device according to any one of claims 15 to 18, wherein the interface unit is further configured to receive the M shift values and/or the M from the second device.
22. The device according to any one of claims 15-21, characterized in that the interface unit is also used to send the N to the second device; or to receive the N from the second device. N.
23. A communication device, characterized by including an interface unit and a processing unit;

    The processing unit is used to expand the elements in the first carrier reserved TR sequence of length N by M times to obtain the second TR sequence, where N and M are integers greater than 0; The second TR sequence is shifted M times to obtain M third TR sequences, wherein among the M shift values, the difference between two shift values with similar values is K, and K is greater than An integer of 0, K and M do not have a common divisor greater than 1; and according to the M third TR sequences, determine a fourth TR sequence with a length of M*N;

    The processing unit is also configured to demodulate the signal from the first device received by the interface unit according to the fourth TR sequence.
24. The device of claim 23, wherein when M is 2, the M shift values include: 0, -1; or, 0, +1;

    When M is 3, the M shift values include: 0, -1, and +1.
25. The apparatus according to claim 23 or 24, wherein the interface unit is further configured to receive the M shift values and/or the M from the first device.
26. The device according to claim 23 or 24, wherein the processing unit is further configured to calculate the number of IDFT points corresponding to the signal, the number of IDFT points corresponding to the first TR sequence, and the number of IDFT points corresponding to the first TR sequence. The M is determined by at least one of the length N and the difference between the largest element and the smallest element in the first TR sequence.
27. The device according to claim 23, 24 or 26, characterized in that the interface unit is also used to send a message to the first device. Send the M shift values and/or the M.
28. The device according to any one of claims 23 to 27, characterized in that the interface unit is also used to receive the N from the first device; or to send the N to the first device. N.
29. A chip, characterized in that the chip is used to implement the method according to any one of claims 1-14.
30. A computer-readable storage medium, characterized in that a computer program or instructions are stored in the storage medium. When the computer program or instructions are executed, the method according to any one of claims 1-14 is achieved. be realized.
31. A computer program product, characterized in that it includes a computer program or instructions. When the computer program or instructions are executed, the method according to any one of claims 1-14 is implemented.
32. A communication system, characterized by comprising a first device and a second device, wherein the first device is used to implement the method according to any one of claims 1-8; the second device is used to Implement the method as claimed in any one of claims 9-14.