Communication method and device

Abstract

The invention provides a communication method and device. A first device transmits first information indicating a first non-linear interval of a first power amplifier in the first device. The input power and the output power of the first power amplifier in the first nonlinear interval are in a nonlinear relationship, and the first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that the first input power is located in the first nonlinear interval, and the first input power is the input power of the first signal to be sent. The first device transmits a first signal. The second device receives the first signal using a first policy corresponding to the first non-linear interval.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] Before transmitting a signal, the transmitter can use a power amplifier (PA) to amplify the signal, thereby increasing the power of the transmitted signal and improving communication performance. Within the linear range of a power amplifier, the output power and input power have a linear relationship. However, for power amplifiers that exhibit nonlinear characteristics when amplifying signals, there is a nonlinear range where the output power and input power have a nonlinear relationship. In one approach, the transmitter reduces the power of the signal input to the power amplifier by 6–10 dB. This reduces the input power of the power amplifier, which in turn reduces its output power, thus lowering the power of the output signal and degrading communication performance. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a communication method and apparatus that can process signals within the nonlinear range of a power amplifier, thereby improving communication performance.

[0004] In a first aspect, this application provides a communication method. This method can be applied to a first device. The first device can be a user equipment (also called a terminal device), or a chip in the user equipment, or a logic module or software capable of implementing all or part of the user equipment's functions. The method includes: the first device transmitting first information, the first information indicating a first nonlinear range of a first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information further indicates that a first input power is located in the first nonlinear range, and the first input power is the input power of a first signal to be transmitted. The first device then transmits a first signal.

[0005] As can be seen, in this method, the first device indicates the first nonlinear range of the first power amplifier, and indicates that the input power of the first signal to be transmitted by the first device is within the first nonlinear range. Thus, the receiver (e.g., the second device) can receive the first signal using a strategy corresponding to the first nonlinear range. This method enables the first device to process the signal within the nonlinear range of the first power amplifier. Compared to the signal power back-off method of the input power amplifier, the first device transmits a higher-power signal, improving communication performance.

[0006] In one optional implementation, the first information indicates the nonlinear power amplifier curve information corresponding to the first nonlinear interval. The nonlinear power amplifier curve information includes: information characterizing the range of values ​​of the independent variable corresponding to the nonlinear power amplifier curve, and the coefficients of the multiple terms, the coefficients of the linear terms, and the constant term of the nonlinear power amplifier curve.

[0007] In one optional implementation, the first information indicates the nonlinear power amplifier power information corresponding to the first nonlinear interval. The nonlinear power amplifier power information includes at least one of the following: the numerical range of the nonlinear power amplifier power, or the maximum value of the nonlinear power amplifier power.

[0008] In one optional implementation, the first information indicates the error vector magnitude information corresponding to the first nonlinear interval. The error vector magnitude information includes at least one of the following: the numerical range of the error vector magnitude, or the maximum value of the error vector magnitude.

[0009] In one alternative implementation, the first nonlinear interval is associated with at least one of the following: the modulation and demodulation method of the first signal, the precoding method of the first signal, the waveform of the first signal, or channel state information used to transmit the first signal.

[0010] In an optional implementation, before the first device sends the first information, the method further includes: the first device sending second information, the second information requesting the nonlinear processing capability of the second device, the nonlinear processing capability of the second device being used to characterize the receiving and processing capability of the second device for signals processed by the first power amplifier in the first device within a nonlinear range. The first device receives third information, the third information indicating that the second device has nonlinear processing capability, and / or indicating the strength level of the nonlinear processing capability of the second device.

[0011] In an optional implementation, the method further includes: the first device determining a first nonlinear interval that matches the strength level of the nonlinear processing capability of the second device, when the third information indicates the strength level of the nonlinear processing capability of the second device.

[0012] In one optional implementation, the first information further indicates that the second input power is located in a first nonlinear range, the second input power being the input power of the second signal to be transmitted, and the second signal being a reference signal. The first signal is used to carry data. Before the first device transmits the first signal, the method further includes: the first device transmitting the second signal; the first device receiving fourth information, the fourth information being used by the first device to determine whether to transmit the first signal.

[0013] In one alternative implementation, the fourth information indicates the first nonlinear interval. Alternatively, the fourth information includes a performance value of the second device receiving the second signal using a first strategy, the first strategy corresponding to the first nonlinear interval. Alternatively, the fourth information indicates that the performance of the second device receiving the second signal using the first strategy meets the requirements, the first strategy corresponding to the first nonlinear interval.

[0014] In an optional implementation, the method further includes: a first device sending fifth information, the fifth information indicating a second nonlinear range of a first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship; the fifth information also indicating that a third input power is located within the second nonlinear range, the third input power being the input power of a third signal to be transmitted. The first device then transmits a third signal.

[0015] Secondly, this application provides a communication method. This method is applied to a second device. The second device can be a network device (e.g., a base station), or a chip in the network device, or a logic module or software capable of implementing all or part of the network device's functions. The method includes: the second device receiving first information, the first information indicating a first nonlinear range of a first power amplifier in a first device. Within the first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and the first input power is the input power of a first signal. In response to receiving the first information, the second device adopts a first strategy to receive a first signal, the first strategy corresponding to the first nonlinear range.

[0016] As can be seen, in this method, the second device receives the first nonlinear range of the first power amplifier indicated by the first device, and the input power of the first signal to be transmitted by the first device is located within the first nonlinear range. Therefore, the second device can use a first strategy corresponding to the first nonlinear range to receive the first signal. This method enables the first device to process the signal within the nonlinear range of the first power amplifier. Compared to the signal power back-off method of the input power amplifier, the second device receives a higher signal power, thus improving communication performance.

[0017] In one optional implementation, the first information indicates the nonlinear power amplifier curve information corresponding to the first nonlinear interval. The nonlinear power amplifier curve information includes: information characterizing the range of values ​​of the independent variable corresponding to the nonlinear power amplifier curve, and the coefficients of the multiple terms, the coefficients of the linear terms, and the constant term of the nonlinear power amplifier curve.

[0018] In one optional implementation, the first information indicates the nonlinear power amplifier power information corresponding to the first nonlinear interval. The nonlinear power amplifier power information includes at least one of the following: the numerical range of the nonlinear power amplifier power, or the maximum value of the nonlinear power amplifier power.

[0019] In one optional implementation, the first information indicates the error vector magnitude information corresponding to the first nonlinear interval. The error vector magnitude information includes at least one of the following: the numerical range of the error vector magnitude, or the maximum value of the error vector magnitude.

[0020] In one alternative implementation, the first nonlinear interval is associated with at least one of the following: the modulation and demodulation method of the first signal, the precoding method of the first signal, the waveform of the first signal, or channel state information used to transmit the first signal.

[0021] In an optional implementation, before the second device receives the first information, the method further includes: the second device receiving second information, the second information requesting the nonlinear processing capability of the second device. The nonlinear processing capability of the second device is used to characterize the second device's ability to receive and process signals processed by the power amplifier in the first device within a nonlinear range. The second device sends third information, the third information indicating that the second device has nonlinear processing capability, and / or indicating the strength level of the nonlinear processing capability of the second device.

[0022] In an optional implementation, the first information further indicates that the second input power is located in a first nonlinear range, the second input power being the input power of the second signal to be transmitted, and the second signal being a reference signal. The first signal is used to carry data. Before the second device receives the first signal, the method further includes: the second device, in response to receiving the first information, employing a first strategy to receive the second signal. If the performance of receiving the second signal using the first strategy meets the requirements, the second device transmits fourth information.

[0023] In one alternative implementation, the fourth information indicates the first nonlinear interval. Alternatively, the fourth information includes a performance value of the second device receiving the second signal using a first strategy, the first strategy corresponding to the first nonlinear interval. Alternatively, the fourth information indicates that the performance of the second device receiving the second signal using the first strategy meets the requirements, the first strategy corresponding to the first nonlinear interval.

[0024] In an optional implementation, the method further includes: a second device receiving fifth information indicating a second nonlinear range of a first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship. The fifth information also indicates that a third input power is located within the second nonlinear range, and the third input power is the input power of a third signal. In response to receiving the fifth information, the second device employs a second strategy to receive the third signal, the second strategy corresponding to the second nonlinear range.

[0025] Thirdly, this application also provides a communication device. This communication device can be a first device. This communication device has the function of implementing some or all of the embodiments described in the first aspect above. Alternatively, the communication device can be a second device. This communication device has the function of implementing some or all of the embodiments described in the second aspect above. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0026] In one possible design, the communication device may include a processing unit configured to support the communication device in performing the corresponding functions described in the above methods. Optionally, the communication device may also include a communication unit for supporting communication between the communication device and other communication devices. Optionally, the communication device may further include a storage unit coupled to the processing unit and the communication unit, which stores necessary program instructions and data for the communication device. Additionally, the processing unit may be used to control the communication unit to transmit and receive data / signaling.

[0027] In one embodiment, the communication unit is configured to transmit first information, which indicates a first nonlinear range of a first power amplifier in the communication device. Within the first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and the first input power is the input power of a first signal to be transmitted. The communication unit is further configured to transmit a first signal.

[0028] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the first aspect above, and will not be described in detail here.

[0029] In another embodiment, a communication unit is configured to receive first information indicating a first nonlinear range of a first power amplifier in a first device. Within this first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link, and the first information further indicates that a first input power is located within the first nonlinear range. The first input power is the input power of a first signal. The communication unit is also configured to, in response to receiving the first information, employ a first strategy to receive a first signal, the first strategy corresponding to the first nonlinear range.

[0030] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the second aspect above, and will not be described in detail here.

[0031] As an example, the communication unit can be a transceiver or a communication interface, the storage unit can be a memory, and the processing unit can be a processor. The processor is coupled to the memory, which stores programs or instructions for the processor. The processor can be used to cause the communication device to perform the method described in the first aspect above when the program or instructions are executed by the processor. The transceiver or communication interface can be used to send and receive signals and / or data.

[0032] In one embodiment, a transceiver is configured to transmit first information indicating a first nonlinear range of a first power amplifier in a communication device. Within this first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range. The first input power is the input power of a first signal to be transmitted. The transceiver is also configured to transmit the first signal.

[0033] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the first aspect above, and will not be described in detail here.

[0034] In another embodiment, the transceiver is configured to receive first information indicating a first nonlinear range of a first power amplifier in a first device. Within the first nonlinear range, there is a nonlinear relationship between the input power and output power of the first power amplifier. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range. The first input power is the input power of a first signal. The transceiver is further configured to, in response to receiving the first information, employ a first strategy to receive a first signal, the first strategy corresponding to the first nonlinear range.

[0035] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the second aspect above, and will not be described in detail here.

[0036] In another embodiment, the communication device is a chip or chip system. The processing unit may also be a processing circuit or logic circuit; the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system.

[0037] In implementation, the processor can be used for, but is not limited to, baseband-related processing, and the transceiver or communication interface can be used for, but is not limited to, radio frequency transceiver. These devices can be disposed on separate chips, or at least partially or entirely on the same chip. For example, the processor can be further divided into analog baseband processors and digital baseband processors. The analog baseband processor can be integrated with the transceiver (or communication interface) on the same chip, while the digital baseband processor can be disposed on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (e.g., but not limited to graphics processors, multimedia processors, etc.) on the same chip. Such a chip can be called a system-on-a-chip (SoC). Whether the various devices are disposed independently on different chips or integrated on one or more chips often depends on the needs of the product design. This application does not limit the implementation form of the above-mentioned devices.

[0038] Fourthly, this application also provides a processor for executing the various methods described above. In the execution of these methods, the processes of sending and receiving the aforementioned information can be understood as the process of the processor outputting the aforementioned information, and the process of the processor inputting the aforementioned information. When outputting the aforementioned information, the processor outputs the aforementioned information to a transceiver so that the transceiver (or communication interface) can transmit it. After being output by the processor, the aforementioned information may require further processing before reaching the transceiver (or communication interface). Similarly, when the processor receives the aforementioned input information, the transceiver (or communication interface) receives the aforementioned information and inputs it into the processor. Furthermore, after the transceiver (or communication interface) receives the aforementioned information, the aforementioned information may require further processing before being input into the processor.

[0039] Unless otherwise specified, or unless it contradicts its actual function or internal logic in the relevant description, the transmission and reception operations involved by the processor can be more generally understood as processor output and reception, input and other operations, rather than transmission and reception operations directly performed by radio frequency circuits and antennas.

[0040] In implementation, the processor can be a dedicated processor for executing these methods, or it can be a processor that executes computer instructions stored in memory to execute these methods, such as a general-purpose processor. The memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or disposed on different chips. This application does not limit the type of memory or the arrangement of the memory and processor.

[0041] Fifthly, this application also provides a communication system including means for performing the method described in the first aspect and means for performing the method described in the second aspect. In another possible design, the system may further include other devices that interact with the means for performing the method described in the first aspect, and / or other devices that interact with the means for performing the method described in the second aspect.

[0042] In a sixth aspect, this application provides a computer-readable storage medium storing a computer program that, when executed, causes the method described in any of the embodiments of the first or second aspect to be implemented.

[0043] Seventhly, this application also provides a computer program product. The computer program product includes computer program code, which, when executed, causes the method described in any of the embodiments of the first or second aspect to be implemented.

[0044] Eighthly, this application provides a chip system. The chip system includes a processor and an interface, the interface being used to acquire programs or instructions, and the processor being used to invoke the programs or instructions to implement the functions involved in the first or second aspect. In one possible design, the chip system further includes a memory for storing necessary program instructions and data for the terminal. The chip system may be composed of chips or may include chips and other discrete devices. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of another communication system provided in an embodiment of this application;

[0047] Figure 3 This is a schematic diagram of another communication system provided in an embodiment of this application;

[0048] Figure 4This is a schematic diagram of another communication system provided in an embodiment of this application;

[0049] Figure 5 This is a schematic diagram of another communication system provided in an embodiment of this application;

[0050] Figure 6 This is a schematic diagram of a power amplifier curve provided in an embodiment of this application;

[0051] Figure 7 This is a schematic diagram of a piecewise curve provided in an embodiment of this application;

[0052] Figure 8 This is a schematic diagram of a nonlinear fitting curve provided in an embodiment of this application;

[0053] Figure 9 This is a schematic diagram of a 1dB compression point provided in an embodiment of this application;

[0054] Figure 10 This is a schematic diagram of a third-order intermodulation distortion provided in an embodiment of this application;

[0055] Figure 11 This is a schematic diagram of a power back-off provided in an embodiment of this application;

[0056] Figure 12 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0057] Figure 13 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0058] Figure 14 This application provides a schematic diagram of the structure of a communication device;

[0059] Figure 15 This application provides a schematic diagram of the structure of another communication device. Detailed Implementation

[0060] The embodiments of this application are described below with reference to the accompanying drawings.

[0061] The technical solutions of the embodiments of this application can be applied to various communication systems. For example, the Global System for Mobile Communications (GSMA), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunications System (UMTX), 4th Generation (4G) mobile communication system, 5th Generation (5G) mobile communication system, New Radio (NR) system, and with the continuous development of communication technology, the technical solutions of the embodiments of this application can also be used in future communication systems, such as 6th Generation (6G) mobile communication system, etc.

[0062] For example, Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application. For example... Figure 1 As shown, the communication system includes a wireless access network. Optionally, the communication system also includes a core network and the Internet. The wireless access network may include at least one wireless access network device and at least one terminal device. The terminal device connects wirelessly to the wireless access network device, and the wireless access network device connects wirelessly or via a wired connection to the core network. The core network device and the wireless access network device in the core network can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated into the same physical device, or a single physical device can integrate some functions of the core network device and some functions of the wireless access network device. Terminal devices can be interconnected with each other via wired or wireless connections, and wireless access network devices can be interconnected with each other via wired or wireless connections.

[0063] The technical solutions of this application embodiment can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. V2X communication includes cellular vehicle-to-everything (C-V2X) communication. C-V2X communication is a V2X communication technology developed based on cellular systems. C-V2X communication utilizes and enhances current cellular network functions and elements to achieve low-latency and high-reliability communication between various nodes in the vehicle network. C-V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, and vehicle-to-network (V2N) communication, such as... Figure 2 As shown.

[0064] Furthermore, when the embodiments of this application are applied to systems where terminal devices communicate directly with each other, such as V2X and D2D systems, these embodiments are applicable to scenarios where the terminal devices have network coverage, and also to communication scenarios where the terminal devices do not have network coverage; thus, the terminal devices can be within or outside the coverage area of ​​the network device. Moreover, when the embodiments of this application are applied to systems such as V2X and D2D, the terminal devices can independently choose the resource mode. For example, Figure 3 , Figure 4 and Figure 5 These are schematic diagrams of another communication scenario provided in the embodiments of this application. Figure 3 In the communication scenario shown, the network device provides a network for terminal device 1 and terminal device 2, and terminal device 1 and terminal device 2 communicate through proximity communication (PC) 5. Figure 4 In the communication scenario shown, the network device provides a network for terminal device 1, while terminal device 2 has no network coverage. Terminal device 1 and terminal device 2 communicate through PC5. Figure 5 In the communication scenario shown, neither terminal device 1 nor terminal device 2 has network coverage, and terminal device 1 and terminal device 2 communicate through PC5.

[0065] In this embodiment, a network device is an entity on the network side used to transmit or receive signals, possessing wireless transceiver capabilities for communication with terminal devices. Network devices include, but are not limited to: access network devices (also referred to as wireless access network devices), radio network controllers (RNCs), base station controllers (BSCs), base transceiver stations (BTSs), home network devices (e.g., home evolved Node B, or home Node B, HNB), baseband units (BBUs), relay devices, transceiver nodes, wireless backhaul nodes, transmission and reception points (TRPs; or, transmission points (TPs), wireless fidelity (WiFi) access points (APs) (i.e., WiFi APs), and world interoperability for microwave access (WiMAX) BSs (i.e., WiMAX BSs). Access network equipment can be a base station (BS), a device deployed in a radio access network that provides wireless communication capabilities. Examples include evolved Node Bs (eNBs or e-NodeBs) and Node Bs in LTE systems, gNodeBs or gNBs in 5G systems, and base stations in future communication systems. A base station can contain a Base Unit (BBU) and a Remote Radio Unit (RRU). The BBU and RRU can be located in different places; for example, the RRU can be deployed remotely to a high-traffic area, while the BBU is located in the central equipment room. Alternatively, the BBU and RRU can be located in the same equipment room. They can also be different components within the same rack. Base stations can take the following forms: macro base stations, micro base stations (also called small cells), pico base stations, relay stations, access points, balloon stations, etc.

[0066] For example, in traditional UMTS or LTE systems, network equipment can be traditional macro base stations (eNBs). In heterogeneous network (HetNet) scenarios, network equipment can be micro base stations (eNBs). In distributed base station scenarios, network equipment can include BBUs and RRUs. In cloud radio access networks (CRAN) scenarios, network equipment can include a baseband pool (BBU pool) and RRUs. In future wireless communication systems, network equipment can be gNBs.

[0067] Optionally, in some deployments of access network equipment, the access network equipment may include centralized units (CUs) and distributed units (DUs). For example, some protocol layer functions of the access network equipment are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU, which is centrally controlled by the CU. In other deployments of access network equipment, the CU can also be divided into CU-control plane (CP) and CU-user plane (UP). In still other deployments of access network equipment, the network equipment can also be an open radio access network (ORAN / O-RAN) architecture. When the access network equipment is an ORAN architecture, the access network equipment can be a functional entity or module in the ORAN, such as a combination of one or more of CUs, DUs, or radio units (RUs). In an ORAN system, the CU can also be called an open (O)-CU, the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, and the CU-UP can also be called an O-CU-UP, etc. The deployment methods of access network devices listed herein are merely examples. As standard technologies evolve, access network devices may have other deployment forms, and this application does not limit them.

[0068] A terminal device is an entity used to receive or actively transmit signals. Terminal devices can also be referred to as user equipment (UE), user communication equipment, terminal, access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, user agent, or user device. In the embodiments of this application, the terminal device can be a handheld device with wireless communication capabilities, an in-vehicle device, an in-vehicle communication module or other embedded communication module, a wearable device, a computing device, or other processing devices connected to a wireless modem. The terminal device can be a terminal capable of connecting to a cellular base station. For example, a terminal device can be a cellular phone, smartphone, tablet, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem, handset, laptop computer, machine-type communication (MTC) terminal, etc. Terminal devices can also be virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, vehicles, in-vehicle terminals, wireless communication equipment in smart factories, and so on.

[0069] The embodiments disclosed in this application will be presented to illustrate various aspects, embodiments, or features of this application in relation to systems including multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches may also be used.

[0070] The relevant concepts involved in the embodiments of this application are described below.

[0071] 1. Nonlinear characteristics of power amplifiers

[0072] For power amplifiers exhibiting nonlinear characteristics when amplifying signal power, when the input power of the power amplifier is low, the output power increases linearly with increasing input power, and the ratio of output power to input power remains constant. When the input power of the power amplifier is high, the output power increases nonlinearly with increasing input power, the ratio of output power to input power gradually decreases with increasing input power, and the output power no longer changes as the input power continues to increase. In the embodiments of this application, the power amplifier can also be referred to as a power amplifier.

[0073] For example, combining Figure 6 , Figure 6 The solid black line in the graph represents the power amplifier curve, which characterizes the relationship between the input power and output power of the power amplifier. For example... Figure 6 As shown, when the input power of the power amplifier is less than or equal to P0, the output power of the power amplifier increases linearly with the increase of the input power, and the ratio between the output power and the input power remains constant. This indicates a linear relationship between the output power and the input power. When the input power of the power amplifier is within the range of P0 to P1, the output power increases non-linearly with the increase of the input power, and the ratio between the output power and the input power decreases with the increase of the input power. This indicates a non-linear relationship between the output power and the input power. When the input power of the power amplifier is P1, the slope of the power amplifier curve is 0. The output power when the input power of the power amplifier is greater than P1 is the same as the output power when the input power is equal to P1.

[0074] In this embodiment, a linear relationship between the output power and input power of the power amplifier means that the ratio of the output power to the input power remains constant as the input power of the power amplifier changes. A non-linear relationship between the output power and input power means that the ratio of the output power to the input power changes as the input power of the power amplifier changes.

[0075] A power amplifier curve can be represented by a function, where the input power of the power amplifier is the independent variable corresponding to the curve. For example, for... Figure 6 The power amplifier curves shown exhibit a linear relationship between input and output power when the independent variable ranges from 0 to P0. However, when the independent variable ranges from P0 to P1, the curves show a non-linear relationship between input and output power.

[0076] Exemplarily, the power amplifier curve consists of a linear straight line and a non-linear curve. Among them, the linear straight line characterizes the linear relationship between the input power and the output power of the power amplifier, and the non-linear curve characterizes the non-linear relationship between the input power and the output power of the power amplifier.

[0077] In an optional manner, the type of the non-linear curve in the power amplifier curve is a piecewise curve. It can be understood that the non-linear curve in the power amplifier curve consists of multiple segments of curves, and each segment of curve in this multiple segments of curves characterizes the non-linear relationship between the input power and the output power of the power amplifier. For example, in Figure 6 the shown power amplifier curve, when the input power of the power amplifier is in the range of 0 to P0, the non-linear curve consists of Curve 1, Curve 2, and Curve 3, as Figure 7 shown. Among them, Curve 1 is represented as f1(x), where P0 < x < P2. Curve 2 is represented as f2(x), where P2 < x < P3. Curve 3 is represented as f3(x), where P3 < x < P1. f1(x), f2(x), and f3(x) are different from each other.

[0078] In another optional implementation manner, the type of the non-linear curve in the power amplifier curve is a non-linear fitting curve. For example, in Figure 6 the shown power amplifier curve, when the input power of the power amplifier is in the range of 0 to P0, the non-linear curve is Curve 4, and Curve 4 is a non-linear fitting curve, as Figure 8 shown. Curve 4 is represented as f4(x), where P0 < x < P1. For example, f4(x) can be obtained by fitting Figure 7 the described f1(x), f2(x), and f3(x).

[0079] In addition, the type of the non-linear curve in the power amplifier curve may be other types in addition to piecewise curves and non-linear fitting curves, and there is no limitation on this.

[0080] 2. 1 decibel (dB) compression point, saturation point, linear interval, non-linear interval

[0081] [[]]The 1dB compression point is defined as: the point where the output power obtained by the power amplifier according to the non-linear relationship is 1dB lower than the output power obtained according to the linear relationship. Among them, the 1dB compression point can be represented by the input power, or can also be represented by the output power, or can also be represented by the combination of the input power and the output power.

[0082] For example, combined with Figure 9 , Figure 9 the thick black solid line in represents the power amplifier curve, and this power amplifier curve characterizes the relationship between the input power and the output power of the power amplifier. Figure 9 The thick gray dashed line in the diagram represents a linear straight line, and the linear relationship it represents is the same as that represented by the linear straight line included in the power amplifier curve. When the input power of the power amplifier is P1, the output power obtained by the power amplifier according to the non-linear relationship is P2, and the output power obtained according to the linear relationship is P3, where P3 - P2 = 1dB. The 1dB compression point can be represented by P1, or by P2, or by both P1 and P2.

[0083] The saturation point refers to the input power at which the slope of the power amplifier curve first becomes zero as the input power of the power amplifier increases. The output power when the input power of the power amplifier is greater than the saturation point is the same as the output power when the input power of the power amplifier is equal to the saturation point. For example, regarding... Figure 6 The power amplifier curve shown has a saturation point of P1.

[0084] The linear range of a power amplifier refers to the range of input power within which the output power and input power have a linear relationship. The nonlinear range of a power amplifier refers to the range of input power within which the output power and input power have a nonlinear relationship. For example, Figure 6 In this diagram, the interval from 0 to P0 is the linear interval of the power amplifier, and the interval from P0 to P1 is the nonlinear interval. Furthermore, part or all of the interval from 0 to P0 can be considered the linear interval of the power amplifier, and part or all of the interval from P0 to P1 can be considered the nonlinear interval.

[0085] 3. Error vector magnitude (EVM)

[0086] EVM refers to the magnitude of the vector difference (i.e., error vector) between a known reference signal and the actual reference signal transmitted through the channel over a period of time. The known reference signal can be predefined or pre-configured, without restriction. Since EVM changes with signal variations, it is usually defined as the effective value of the error vector over a period of time, such as the root mean square (RMS). For example, the transmission power of the reference signal affects EVM, and EVM changes when the transmission power of the reference signal changes. The transmission power of the reference signal may be the power of the reference signal after amplification by a power amplifier. If the power amplifier has nonlinear characteristics, then EVM can be used to describe the in-band distortion characteristics of the signal caused by the nonlinear distortion of the power amplifier. The formula for calculating EVM is shown in formula (1) below.

[0087]

[0088] Where N is the number of discrete signal samples, x Tmax It is the maximum value of the transmitted signal. It is the transmit signal of channel I. It is the transmit signal of the Q channel. It is the received signal from channel I. This is the received signal from the Q channel.

[0089] 4. Interference

[0090] Intermodulation interference refers to the situation where, if multiple signals of different frequencies are simultaneously input into a power amplifier and the input power is within the nonlinear range of the power amplifier, the output signal of the power amplifier will include not only the multiple signals after power amplification, but also additional components of signals of different frequencies mixed together.

[0091] For example, one type of intermodulation interference is third-order intermodulation distortion (IMD3). When multiple fundamental signals of different frequencies are simultaneously input to a power amplifier, and the input power is within the nonlinear range of the power amplifier, the output signal of the power amplifier includes multiple fundamental signals after power amplification, as well as a third-order intermodulation signal. The third-order intermodulation signal is a signal obtained by aliasing of fundamental signals of different frequencies. The value of IMD3 is equal to the power of the fundamental signals in the output signal of the power amplifier minus the power of the third-order intermodulation signal.

[0092] For example, combining Figure 10 Signal 1 with frequency f1 and signal 2 with frequency f2 are simultaneously input to a power amplifier, and the input power is within the nonlinear range of the power amplifier. The output signals of the power amplifier include: amplified signal 1, amplified signal 2, signal 3, and signal 4. Signal 3 is a third-order intermodulation signal with frequencies of 2f1-f2, and signal 4 is a third-order intermodulation signal with frequencies of 2f2-f1. The power of signal 1 input to the power amplifier is P. in 1. The power of the input power amplifier for signal 2 is P. in 2. The power of signal 1 output by the power amplifier is P. out 1. The power of signal 1 output by the power amplifier is P. out 2. The power of signal 3 output by the power amplifier is P. imd3 1. The power of signal 4 output by the power amplifier is P. imd3 2. Therefore, the value of IMD3 corresponding to signal 1 is P. out 1-P imd3 1. The value of IMD3 corresponding to signal 2 is equal to P. out 2-P imd3 2.

[0093] It is evident that the nonlinear characteristics of a power amplifier can cause intermodulation interference, leading to signal distortion at the power amplifier's output and causing spectral augmentation, which can interfere with signals in adjacent channels and increase the bit error rate.

[0094] To reduce signal distortion caused by the nonlinear characteristics of the power amplifier, one approach is to reduce the power of the signal input to the power amplifier by 6dB to 10dB, so that the power amplifier operates at a level much lower than the 1dB compression point. This brings the input power of the power amplifier into or close to the linear range, thereby improving the third-order intermodulation distortion of the power amplifier.

[0095] For example, combining Figure 11 Assuming the transmitter does not perform power back-off, after the transmitter inputs the signal to the power amplifier, the power of the signal output by the power amplifier is as follows: Figure 11 As shown in section (A), a portion of the output signal power is the output power obtained when the power amplifier operates in the nonlinear region. If the transmitter performs power back-off, i.e., reduces the power of the signal input to the power amplifier, it will reduce the power of the signal output by the power amplifier, so that most of the output signal power is the output power obtained when the power amplifier operates in the linear region, as shown in section (A). Figure 11 As shown in section (B) of the diagram. Additionally, after receiving the signal, the receiver can clip the portion of the signal whose power is in the nonlinear region, so that the receiver can subsequently process the signal whose power is entirely in the linear region. It is evident that the power back-off method reduces the signal power input to the power amplifier, which in turn reduces the signal power output of the power amplifier, leading to a decrease in communication performance.

[0096] This application provides a communication method that enables a first device to process signals within the nonlinear range of a first power amplifier. Compared to methods that reduce the signal power of the input power amplifier, this method allows the first device to transmit signals with higher power, thereby improving communication performance.

[0097] The embodiments of this application are described in detail below with reference to the accompanying drawings. The embodiments of this application use a first device and a second device as examples to illustrate the corresponding methods. However, this application does not limit the executing entity of the method. For example, the device in the method can also be a chip, chip system, or processor that supports the device in implementing the corresponding method, or it can be a logic module or software that can implement all or part of the functions of the device.

[0098] For example, the first device is a network device, and the second device is a terminal device. Or, for another example, the first device is a terminal device, and the second device is a network device. The network device and the terminal device can transmit information / data / signals via the Uu air interface, where Uu stands for Evolved Universal Terrestrial Radio Access Network to User Equipment (UTRAN-to-UE). The network device can send downlink (DL) information, DL data, or DL ​​signals to the terminal device, and the terminal device receives DL information, DL data, or DL ​​signals from the network device. The terminal device can also send uplink (UL) information, UL data, or UL signals to the network device, and the network device receives UL information, UL data, or UL signals from the terminal device.

[0099] For example, the first device and the second device are different terminal devices, and the different terminal devices transmit SL information, SL data or SL signals through the sidelink (SL) air interface.

[0100] Please see Figure 12 , Figure 12 This is a flowchart illustrating a communication method provided in an embodiment of this application. The communication method includes the following steps.

[0101] S101, the first device sends first information. Correspondingly, the second device receives the first information.

[0102] The first information indicates the first nonlinear range of the first power amplifier in the first device. Within the first nonlinear range, there is a nonlinear relationship between the input power and the output power of the first power amplifier. The first power amplifier is a power amplifier in the radio frequency link. The first information also indicates that the first input power is located in the first nonlinear range. The first input power is the input power of the first signal to be transmitted.

[0103] Understandably, the first signal to be transmitted is the signal amplified by the first power amplifier according to the first input power; therefore, the first input power is the input power of the first signal to be transmitted. For example, the first signal is the output signal obtained by the first device inputting the fourth signal into the first power amplifier, and the power of the fourth signal when inputting into the first power amplifier is the first input power.

[0104] The optional methods for indicating the first nonlinear interval with the first information are described below, as described in optional embodiments 1.1 to 1.3.

[0105] Implementation method 1.1, the first information includes the nonlinear power amplifier curve information corresponding to the first nonlinear interval; wherein, the nonlinear power amplifier curve information includes: information characterizing the range of values ​​of the independent variable corresponding to the nonlinear power amplifier curve, and the multinomial term coefficient, linear term coefficient, and constant term of the nonlinear power amplifier curve.

[0106] Therefore, the second device can determine the first nonlinear interval based on the information in the first information that characterizes the range of values ​​of the independent variable corresponding to the nonlinear power amplifier curve. The second device can determine the nonlinear power amplifier curve corresponding to the first nonlinear interval based on the information that characterizes the range of values ​​of the independent variable corresponding to the nonlinear power amplifier curve, as well as the coefficients of the multiple terms, the coefficients of the linear terms, and the constant term of the nonlinear power amplifier curve.

[0107] In this embodiment, the nonlinear power amplifier curve corresponding to the first nonlinear interval refers to the curve in the power amplifier curve of the first power amplifier where the independent variable takes values ​​within the first nonlinear interval. For example, combined with... Figure 7 If the first nonlinear interval is from P0 to P2, then the nonlinear power amplifier curve corresponding to the first nonlinear interval is curve 1; if the first nonlinear interval is from P0 to P3, then the nonlinear power amplifier curve corresponding to the first nonlinear interval consists of curve 1 and curve 2. For example, combining... Figure 8 If the first nonlinear interval is from P0 to P2, then the nonlinear power amplifier curve corresponding to the first nonlinear interval is: the curve in curve 4 with the independent variable taking values ​​from P0 to P2; if the first nonlinear interval is from P0 to P3, then the nonlinear power amplifier curve corresponding to the first nonlinear interval is: the curve in curve 4 with the independent variable taking values ​​from P0 to P3.

[0108] Optionally, the nonlinear amplifier curve information corresponding to the first nonlinear interval may also include: the type of the nonlinear amplifier curve corresponding to the first nonlinear interval. For example, the type of the nonlinear amplifier curve corresponding to the first nonlinear interval is a nonlinear fitting curve. Another example is that the type of the nonlinear amplifier curve corresponding to the first nonlinear interval is a piecewise curve. Yet another example is that the type of the nonlinear amplifier curve corresponding to the first nonlinear interval is a multiple curve, such as a cubic curve or a quadratic curve.

[0109] Case 1: The nonlinear power amplifier curve corresponding to the first nonlinear interval is a non-segmented curve.

[0110] Exemplarily, in the case where the non - linear curve included in the power - amplification curve of the first power amplifier is a piece - wise curve, the non - linear curve consists of multiple segments, and the non - linear power - amplification curve corresponding to the first non - linear interval is part or all of one of the multiple segments. For example, in combination with Figure 7 , the non - linear power - amplification curve corresponding to the first non - linear interval is part or all of Curve 1, or the non - linear power - amplification curve corresponding to the first non - linear interval is part or all of Curve 2, or the non - linear power - amplification curve corresponding to the first non - linear interval is part or all of Curve 3.

[0111] Exemplarily, in the case where the non - linear curve included in the power - amplification curve of the first power amplifier is a non - linear fitting curve, the type of the non - linear power - amplification curve corresponding to the first non - linear interval is a non - linear fitting curve. For example, in combination with Figure 8 , the non - linear power - amplification curve corresponding to the first non - linear interval is a part of Curve 4.

[0112] For the power - amplification curve of the first power amplifier, reference can be made to the relevant descriptions above, and details will not be repeated.

[0113] For example, the first non - linear interval is the interval from P1 to P2, where P1 < P2; the non - linear power - amplification curve corresponding to the first non - linear interval is as shown in Formula (2).

[0114] f(x)=ax 2 +bx + c, P1 < x < P2 (2)

[0115] Then, in the non - linear power - amplification curve information, the information characterizing the value range of the independent variable corresponding to the non - linear power - amplification curve includes: P1, P2, and the multiple coefficients of the non - linear power - amplification curve include: a, b, c.

[0116] Again, for example, the first non - linear interval is the interval from P1 to P2, where P1 < P2; the non - linear power - amplification curve corresponding to the first non - linear interval is as shown in Formula (3).

[0117] f(x)=ax 3 +bx 2 +cx + d, P1 < x < P2 (3)

[0118] Then, in the non - linear power - amplification curve information, the information characterizing the value range of the independent variable corresponding to the non - linear power - amplification curve includes: P1, P2, and the multiple coefficients of the non - linear power - amplification curve include: a, b, c, d.

[0119] Optional method A. In case 1, the non-linear power amplifier curve information further includes: a first indication, which indicates the type of each coefficient among the multiple coefficients included in the non-linear power amplifier curve information. Each coefficient type is one of the following: the multiple-term coefficient of the non-linear power amplifier curve, the first-term coefficient of the non-linear curve, and the constant term of the non-linear curve. In this way, the second device can determine the type of each coefficient in the non-linear power amplifier curve information based on the first indication, and then determine the non-linear power amplifier curve corresponding to the first non-linear interval.

[0120] For example, the first non-linear interval is the interval from P1 to P2, where P1 < P2; the non-linear power amplifier curve corresponding to the first non-linear interval is shown in formula (2). In the non-linear power amplifier curve information, the information representing the range of the independent variable values corresponding to the non-linear power amplifier curve includes: P1, P2, and the multiple coefficients of the non-linear power amplifier curve include: a, b, c. The non-linear power amplifier curve information further includes a first indication, which indicates the following: a1 is the first-term coefficient of the linear straight line, b1 is the constant term of the linear straight line, a2 is the multiple-term coefficient of the non-linear curve, b2 is the first-term coefficient of the non-linear curve, and c is the constant term of the non-linear curve. Then, the second device determines that the first non-linear interval is the interval from P1 to P2 based on the information representing the range of the independent variable values corresponding to the non-linear power amplifier curve. The second device can determine the non-linear power amplifier curve of the first power amplifier as shown in formula (2) based on the information representing the range of the independent variable values corresponding to the non-linear power amplifier curve, the multiple coefficients of the non-linear power amplifier curve, and the first indication.

[0121] Optional method B. In case 1, the first device and the second device can negotiate in advance to determine the structure of the non-linear power amplifier curve, or configure the structure of the non-linear power amplifier curve for the first device and the second device in advance. The first device arranges the multiple-term coefficient, the first-term coefficient, and the constant term of the non-linear power amplifier curve in the non-linear power amplifier curve information in a predefined order. In this way, the second device can determine the non-linear power amplifier curve of the first power amplifier based on the known predefined order and the structure of the non-linear power amplifier curve.

[0122] For example, the first device and the second device negotiate in advance to determine that the structure of the non-linear power amplifier curve is as shown in formula (4). Moreover, the first device and the second device agree that the multiple coefficients of the non-linear power amplifier curve are arranged in the following order in the non-linear power amplifier curve information: the second-term coefficient of the non-linear power amplifier curve, the first-term coefficient of the non-linear power amplifier curve, and the constant term of the non-linear power amplifier curve.

[0123] f(x) = Ax 2 + Bx + C (4)

[0124] Suppose the first non-linear interval is the interval from P1 to P2, where P1 < P2; the non-linear power amplifier curve corresponding to the first non-linear interval is as shown in formula (2). In the information of the non-linear power amplifier curve, the information characterizing the range of the independent variable corresponding to the non-linear power amplifier curve includes: P1, P2, and the multiple coefficients arranged in a conventional order are: a, b, c. In this way, after the second device receives the information of the non-linear power amplifier curve, based on the conventional order, it can determine that in the information of the non-linear power amplifier curve shown in formula (4), A = a, B = b, and C = c. The second device determines that the first non-linear interval is the interval from P1 to P2 based on the information characterizing the range of the independent variable corresponding to the non-linear power amplifier curve. Then, the second device can determine that the non-linear power amplifier curve of the first power amplifier is as shown in formula (4).

[0125] Case 2: The non-linear power amplifier curve corresponding to the first non-linear interval is a piecewise curve.

[0126] Exemplarily, in the case where the non-linear curve included in the power amplifier curve of the first power amplifier is a piecewise curve, the non-linear curve is composed of multiple segments of curves, and the non-linear power amplifier curve corresponding to the first non-linear interval is composed of at least two segments of curves among the multiple segments of curves. For example, in combination with Figure 7 , the non-linear power amplifier curve corresponding to the first non-linear interval is composed of curve 1 and curve 2, or the non-linear power amplifier curve corresponding to the first non-linear interval is composed of curve 1 and the front part of curve 2, or the non-linear power amplifier curve corresponding to the first non-linear interval is composed of the rear part of curve 1 and curve 2, or the non-linear power amplifier curve corresponding to the first non-linear interval is composed of the rear part of curve 1 and the front part of curve 2. For the power amplifier curve of the first power amplifier, reference can be made to the foregoing related descriptions, which will not be elaborated here.

[0127] For example, the first non-linear interval of the first power amplifier is the interval from P1 to P3, where P1 < P3; the non-linear power amplifier curve of the first power amplifier is a piecewise curve as shown in formula (5).

[0128]

[0129] Then, in the information of the non-linear power amplifier curve, the information characterizing the range of the independent variable corresponding to the non-linear power amplifier curve includes: P1, P2, P3, and the multiple coefficients of the non-linear power amplifier curve include: a1, b1, c1, a2, b2, c2.

[0130] Optional method A. In case 2, the non-linear power amplifier curve information further includes: a second indication, where the second indication indicates the correspondence between each coefficient included in the non-linear power amplifier curve information and the range of the independent variable values of the non-linear power amplifier curve. The second indication also indicates the type of each coefficient in the first curve included in the non-linear power amplifier curve, and the range of the independent variable values of the first curve has a correspondence with this coefficient. The type of the coefficient in the first curve is one of the following: the multiple-term coefficient of the first curve, the first-term coefficient of the first curve, the constant term of the first curve. In this way, the second device can combine the second indication to determine each segment of the curve in the non-linear power amplifier curve corresponding to the first non-linear interval, and further determine the non-linear power amplifier curve corresponding to the first non-linear interval.

[0131] For example, the first non-linear interval of the first power amplifier is the interval from P1 to P3, where P1 < P3; the non-linear power amplifier curve of the first power amplifier is a piecewise curve as shown in formula (5). In the non-linear power amplifier curve information, the information characterizing the range of the independent variable values corresponding to the non-linear power amplifier curve includes: P1, P2, P3, and the multiple coefficients of the non-linear power amplifier curve include: a1, b1, c1, a2, b2, c2. The non-linear power amplifier curve information further includes a second indication, and the second indication indicates the following items: there is a correspondence between a1, b1, c1 and the range from P1 to P2, a1 is the quadratic-term coefficient, b1 is the first-term coefficient, c1 is the constant term, and the second indication also indicates the following items: there is a correspondence between a2, b2, c2 and the range from P2 to P3, a2 is the quadratic-term coefficient, b2 is the first-term coefficient, c2 is the constant term. Then, the second device determines that the first non-linear interval of the first power amplifier is the interval from P1 to P3 based on the information characterizing the range of the independent variable values corresponding to the non-linear power amplifier curve. The second device can determine that the non-linear power amplifier curve of the first power amplifier is as shown in formula (5) based on the information characterizing the range of the independent variable values corresponding to the non-linear power amplifier curve, the multiple coefficients of the non-linear power amplifier curve, and the second indication.

[0132] Optional method B. In case 2, the first device and the second device can negotiate in advance to determine the structure of the piecewise curve, or configure the structure of the piecewise curve for the first device and the second device in advance. The first device arranges the multiple-term coefficients, first-term coefficients, and constant terms of the non-linear power amplifier curve in the non-linear power amplifier curve information in a predetermined order. In this way, the second device can determine the non-linear power amplifier curve of the first power amplifier based on the known predetermined order and the structure of the non-linear power amplifier curve.

[0133] For example, the first device and the second device negotiate in advance to determine that the piecewise curve consists of curve 1 with a structure as shown in formula (6) and curve 2 with a structure as shown in formula (7), and the value range of the independent variable of curve 1 is less than that of curve 2. Moreover, the first device and the second device agree that the multiple coefficients of the nonlinear power amplifier curve in the nonlinear power amplifier curve information are arranged in the following order: the quadratic coefficient of curve 1, the linear coefficient of curve 1, the constant term of curve 1, the quadratic coefficient of curve 2, the linear coefficient of curve 2, and the constant term of curve 2.

[0134] f1(x) = A1x 2 + B1x + C1 (6)

[0135] f2(x) = A2x 2 + B2x + C2 (7)

[0136] Suppose the first nonlinear interval of the first power amplifier is the interval from P1 to P3, where P1 < P3; the nonlinear power amplifier curve of the first power amplifier is a piecewise curve as shown in formula (5). In the nonlinear power amplifier curve information, the information characterizing the value range of the independent variable corresponding to the nonlinear power amplifier curve includes: P1, P2, P3, and the multiple coefficients arranged in the agreed order are: a1, b1, c1, a2, b2, c2. In this way, after receiving the nonlinear power amplifier curve information, the second device can determine that the first nonlinear interval is the interval from P1 to P3 based on the information characterizing the value range of the independent variable corresponding to the nonlinear power amplifier curve. The second device determines, based on the agreed order, that in curve 1 shown in formula (6), A1 = a1, b1 = b1, C1 = c1, and in curve 2 shown in formula (7), A2 = a2, B2 = b2, C2 = c2. Then, the second device can determine that the nonlinear power amplifier curve of the first power amplifier is as shown in formula (5).

[0137] In addition, in the embodiments of the present application, the type of the nonlinear power amplifier curve can be other types in addition to the piecewise curve and the nonlinear power amplifier fitting curve, and there is no limitation thereto. Moreover, when the type of the nonlinear power amplifier curve is other types in addition to the piecewise curve and the nonlinear power amplifier fitting curve, the nonlinear power amplifier curve information in the first information can be similar to the case of the piecewise curve / nonlinear power amplifier fitting curve, or can also be adaptively adjusted according to the type of the nonlinear power amplifier curve, and there is no limitation thereto.

[0138] Embodiment 1.2, the first information includes the nonlinear power amplifier power information corresponding to the first nonlinear interval, and the nonlinear power amplifier power information includes at least one of the following: the numerical range of the nonlinear power amplifier power, or the maximum value of the nonlinear power amplifier power.

[0139] For example, the first non-linear interval is the interval from P1 to P2, where P1 < P2. The non-linear power amplifier power information in the first information includes: P1, P2. In this way, based on the non-linear power amplifier power information in the first information, the second device can determine that the first non-linear interval is the interval from P1 to P2. Alternatively, the non-linear power amplifier power information in the first information includes: P2. In this way, based on the non-linear power amplifier power information in the first information, the second device can determine that the maximum value of the first non-linear interval is P2.

[0140] In Embodiment 1.3, the first information includes error vector magnitude information corresponding to the first non-linear interval, and the error vector magnitude information includes at least one of the following: the numerical range of the error vector magnitude, or the maximum value of the error vector magnitude.

[0141] For example, the first non-linear interval is the interval from P1 to P2, where P1 < P2. When the input power of the first power amplifier is within the interval from P1 to P2, the EVM is within the range from EVM1 to EVM2, where EVM1 < EVM2. The error vector magnitude information in the first information includes: EVM1, EVM2. In this way, based on EVM1 and EVM2 in the first information, the second device can determine that the first non-linear interval is the interval from P1 to P2. Alternatively, the non-linear power amplifier power information in the first information includes: EVM2. In this way, based on the error vector magnitude information in the first information, the second device can determine that the maximum value of the first non-linear interval is P2.

[0142] In addition, in the embodiments of the present application, any one of the above Embodiment 1.1 to Embodiment 1.3 can be implemented alone, or can be combined in pairs, or can also be combined in three.

[0143] In an optional embodiment, a part of the method in Embodiment 1.1 is combined with Embodiment 1.2 and / or Embodiment 1.3. For example, the first information includes non-linear power amplifier curve information and non-linear power amplifier power information corresponding to the first non-linear interval, or the first information includes non-linear power amplifier curve information and error vector magnitude information corresponding to the first non-linear interval. Among them, the non-linear power amplifier curve information includes the type of the non-linear power amplifier curve, or the non-linear power amplifier curve information includes the type of the non-linear power amplifier curve and partial coefficients of the non-linear power amplifier curve. The non-linear power amplifier power information includes at least one of the following: the numerical range of the non-linear power amplifier power, or the maximum value of the non-linear power amplifier power. The error vector magnitude information includes at least one of the following: the numerical range of the error vector magnitude, or the maximum value of the error vector magnitude.

[0144] In one alternative implementation, the first nonlinear interval is associated with at least one of the following: the modulation and demodulation method of the first signal, the precoding method of the first signal, the waveform of the first signal, or channel state information used to transmit the first signal.

[0145] Understandably, since any one or more of the modulation / demodulation method, precoding method, signal waveform, and channel state information can affect the linear and nonlinear ranges of the first power amplifier, the value of the first linear range can also be affected. For example, the value of the first linear range may differ when one or more of the modulation / demodulation method, precoding method, signal waveform, and channel state information are different. Furthermore, in this embodiment, besides the factors listed here that affect the first linear range, other factors may also influence it. For example, any operation in the process of the first device generating the first signal may affect the value of the first linear range, and this is not a limitation.

[0146] The modulation and demodulation methods may include, for example, binary phase shift keying (BPSK) / quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), 64QAM, ..., 1024QAM, and 4096QAM. The precoding method may include, for example, the first device calculating a precoding matrix based on a codebook or channel state information. The signal waveform may include, for example, orthogonal frequency-division multiplexing (OFDM) waveforms or enhanced discrete fourier transform-spread (DFT-S) waveforms. The channel state information may include, for example, the position of the first device and the moving speed of the first device.

[0147] For example, assuming the power amplifier curve of the first power amplifier is a piecewise curve, the structure is as shown in formula (8), and the structure of the power amplifier curve of the first power amplifier is a nonlinear fitting curve, as shown in formula (9), as shown in Table 1. Table 1 illustrates the influence of different modulation and demodulation methods on the power amplifier curve of the first power amplifier.

[0148]

[0149] f(x) = Ax 2 +Bx+C,X1 <x<X2 (9)

[0150] Table 1

[0151]

[0152]

[0153] In Table 1, the values ​​of the coefficients of the power amplifier curve may differ under different modulation and demodulation methods, and the range of values ​​for the independent variable of the power amplifier curve may also differ. When the modulation and demodulation method is BPSK / QPSK, the maximum value of the first nonlinear interval is less than or equal to P. 11 When the modulation and demodulation mode is 16QAM, the maximum value of the first nonlinear interval is less than or equal to P. 21 When the modulation and demodulation mode is 64QAM, the maximum value of the first nonlinear interval is less than or equal to P. 31 .

[0154] For example, as shown in Table 2, Table 2 illustrates the effect of modulation and demodulation methods on the linear and nonlinear ranges of the first power amplifier.

[0155] Table 2

[0156]

[0157] In Table 2, P 10 P 20 P 30 Different, P 11 P 21 P 31 Different. When the modulation and demodulation method is BPSK / QPSK, the maximum value of the first nonlinear interval is less than or equal to P. 11 When the modulation and demodulation mode is 16QAM, the maximum value of the first nonlinear interval is less than or equal to P. 21 When the modulation and demodulation mode is 64QAM, the maximum value of the first nonlinear interval is less than or equal to P. 31 .

[0158] For example, as shown in Table 3, Table 3 illustrates the effect of modulation and demodulation methods on the EVM corresponding to the linear range and the EVM corresponding to the nonlinear range of the first power amplifier.

[0159] Table 3

[0160]

[0161] In Table 3, EVM10, EVM20, and EVM30 are different, as are EVM11, EVM21, and EVM31. When the modulation / demodulation method is BPSK / QPSK, the maximum value of the first nonlinear interval is less than or equal to P. 11The input power of the first power amplifier is P. 11 The corresponding EVM is EVM11. When the modulation / demodulation mode is 16QAM, the maximum value of the first nonlinear interval is less than or equal to P. 21 The input power of the first power amplifier is P. 21 The corresponding EVM is EVM21. When the modulation / demodulation mode is 64QAM, the maximum value of the first nonlinear interval is less than or equal to P. 31 The input power of the first power amplifier is P. 31 The corresponding EVM is EVM31.

[0162] In one optional implementation, the method further includes: a first device sending information indicating the linear range of a first power amplifier. For example, the linear range of the first power amplifier is 0 to P1, where P1 > 0. The information indicating the linear range of the first power amplifier includes P1, so that a second device can determine that the maximum value of the linear range of the first power amplifier is P1. Alternatively, the information indicating the linear range of the first power amplifier includes: the EVM corresponding to the first power amplifier at an input power of P1, so that the second device determines P1 based on the EVM corresponding to the first power amplifier at an input power of P1, and thus determines that the maximum value of the linear range of the first power amplifier is P1.

[0163] S102, the first device sends a first signal. Correspondingly, the second device, in response to receiving the first information, adopts a first strategy to receive the first signal, the first strategy corresponding to a first nonlinear interval.

[0164] In an optional implementation, the method further includes: a second device determining a first strategy based on a first nonlinear interval. For example, different nonlinear intervals correspond to different receiving strategies or receiving algorithms, and the first strategy is the receiving strategy or receiving algorithm corresponding to the first nonlinear interval. The receiving strategy or receiving algorithm may include, for example, receiving signals using a k-means optimization algorithm based on an attenuation function, receiving signals using a k-means optimization algorithm based on a genetic algorithm, receiving signals using a residual real-valued time-delay convolutional neural network model, receiving signals using a digital predistortion algorithm based on a beam adaptive neural network, etc. For example, the maximum value of nonlinear interval 1 is equal to power P1, and the maximum value of nonlinear interval 2 is equal to power P2, where P2 > P1. The strategy corresponding to nonlinear interval 1 is: receiving signals using a k-means optimization algorithm based on an attenuation function. The strategy corresponding to nonlinear interval 2 is: receiving signals using a k-means optimization algorithm based on a genetic algorithm. If the first nonlinear interval determined by the second device is nonlinear interval 1, the second device receives the first signal using a k-means optimization algorithm based on an attenuation function. If the first nonlinear interval determined by the second device is nonlinear interval 2, the second device receives the first signal using a k-means optimization algorithm based on a genetic algorithm.

[0165] In an optional implementation, before the first device sends the first information, the method further includes: the first device sending second information, the second information requesting the nonlinear processing capability of the second device, the nonlinear processing capability of the second device being used to characterize the receiving and processing capability of the second device for signals processed by the first power amplifier in the first device within a nonlinear range; correspondingly, the second device receiving the second information. The second device then sends third information, the third information indicating that the second device has nonlinear processing capability, and / or indicating the strength level of the nonlinear processing capability of the second device; correspondingly, the first device receiving the third information.

[0166] The second device has nonlinear processing capability, which can be understood as the ability to process signals that have been amplified by the first power amplifier within the nonlinear range. Conversely, the second device does not have nonlinear processing capability, which can be understood as the ability to process signals that have been amplified by the first power amplifier within the nonlinear range.

[0167] Understandably, upon receiving the third information, the first device can determine that the second device has nonlinear processing capabilities. Therefore, the first device determines that the signal can be amplified within the nonlinear range using the first power amplifier. In this case, the first device can execute steps S101 and S102. Alternatively, if the first device receives a sixth information after sending the second information, indicating that the second device does not have nonlinear processing capabilities, the first device can determine that the second device does not have nonlinear processing capabilities. Therefore, the first device determines that the signal can be amplified within the linear range using the first power amplifier. In this case, the first device does not execute steps S101 to S102.

[0168] In one alternative approach, after receiving the second information, the second device sends a first bit information, the third information is the first bit information indicating that the second device has nonlinear processing capability, and the sixth information is the first bit information indicating that the second device does not have nonlinear processing capability.

[0169] For example, the value of the first bit information can be "0" or "1" to represent whether the second device has nonlinear processing capability. For instance, a value of "1" indicates that the second device has nonlinear processing capability, and a value of "0" indicates that the second device does not have nonlinear processing capability. Alternatively, a value of "0" indicates that the second device has nonlinear processing capability, and a value of "1" indicates that the second device does not have nonlinear processing capability. Furthermore, the value of the first bit information can also be represented in other ways, such as a value of "true" indicating that the second device has nonlinear processing capability, and a value of "false" indicating that the second device does not have nonlinear processing capability; there are no restrictions.

[0170] In one optional implementation, the third information includes second bit information, the value of which indicates the strength level of the nonlinear processing capability of the second device. For example, the strength level of the nonlinear processing capability of the second device includes two levels: "strong" and "weak". For instance, if the nonlinear processing capability of the second device is: the second device supports receiving and processing signals with a maximum nonlinear transmission power of P1, the strength level of the nonlinear processing capability of the second device is "strong". If the nonlinear processing capability of the second device is: the second device supports receiving and processing signals with a maximum nonlinear transmission power of P2, the strength level of the nonlinear processing capability of the second device is "weak". P1>P2; the nonlinear transmission power is the power of the signal after being amplified by the first power amplifier within the nonlinear range. The value of the second bit information can use "0" or "1" to characterize the strength level of the nonlinear processing capability of the second device. For example, a value of "1" indicates a "strong" strength level of the nonlinear processing capability of the second device, and a value of "0" indicates a "weak" strength level of the nonlinear processing capability of the second device. Alternatively, a value of "0" for the second bit indicates a "strong" level of nonlinear processing capability of the second device, while a value of "1" indicates a "weak" level. No restrictions are imposed.

[0171] Optionally, the method further includes: when the third information indicates the strength level of the nonlinear processing capability of the second device, the first device determines a first nonlinear interval that matches the strength level of the nonlinear processing capability of the second device. For example, the strength level of the nonlinear processing capability of the second device includes two levels: "strong" and "weak". If the nonlinear processing capability of the second device is: the second device supports receiving and processing signals with a maximum nonlinear transmission power of P1, the strength level of the nonlinear processing capability of the second device is "strong". If the nonlinear processing capability of the second device is: the second device supports receiving and processing signals with a maximum nonlinear transmission power of P2, the strength level of the nonlinear processing capability of the second device is "weak". P1>P2. If the third information indicates that the strength level of the nonlinear processing capability of the second device is "strong", the maximum value of the first nonlinear interval is less than or equal to P3, where P3 is the input power of the first power amplifier when the output power of the first power amplifier is P1. If the third information indicates that the strength level of the nonlinear processing capability of the second device is "weak", the maximum value of the first nonlinear interval is less than or equal to P4, where P4 is the input power of the first power amplifier when the output power of the first power amplifier is P2.

[0172] In addition, in the embodiments of this application, the third information may be, for example, downlink control information (DCI), or it may be carried in radio resource control (RRC) signaling, or it may be carried in medium access control control element (MAC CE), and there are no restrictions on this.

[0173] In an optional implementation, the first information further indicates that the second input power is located in a first nonlinear range, the second input power being the input power of the second signal to be transmitted, and the second signal being a reference signal. The first signal is used to carry data. Before the first device transmits the first signal, the method further includes: the first device transmitting the second signal; correspondingly, the second device, in response to receiving the first information, adopts a first strategy to receive the second signal. If the performance of receiving the second signal using the first strategy meets the requirements, the second device transmits fourth information; correspondingly, the first device receives the fourth information. The first device determines to transmit the first signal based on the fourth information. The second signal is, for example, a reference signal (RS) in an NR network, or a demodulation reference signal (DMRS), without limitation. The first signal is, for example, a physical uplink shared channel (PUSCH), without limitation.

[0174] Understandably, before sending the first signal carrying data, the first device also sends a reference signal (i.e., the second signal) that has been amplified by the first power amplifier in the first nonlinear region. The second device sends the fourth information if the performance of receiving the second signal using the first strategy meets the requirements, so that the first device can send the first signal upon receiving the fourth information. This method helps ensure that the performance of the second device receiving the first signal using the first strategy meets the requirements. In this embodiment, the performance requirement of the second device receiving the signal meeting the requirements refers to: the signal-to-noise ratio (SNR), or signal-to-interference-plus-noise ratio (SINR), or bit error rate (BER), or block error rate (BLER), or system throughput, or the rate of the first device meeting the service requirements, such as BLER < 10%.

[0175] In one optional implementation, the fourth information indicates the first nonlinear interval. It is understood that since the second device has already received the first information before using the first strategy to receive the second signal, and the first information indicates the first nonlinear interval, then, if the performance of the second device in receiving the second signal using the first strategy meets the requirements, it can determine the fourth information in the manner that the first information indicates the first nonlinear interval. The manner in which the first information indicates the first nonlinear interval can be found in the foregoing description and will not be repeated here.

[0176] In another alternative implementation, the fourth information includes performance values ​​of the second device receiving the second signal using the first strategy. Understandably, if the performance of the second device receiving the second signal using the first strategy meets the requirements, the second device can send the performance values ​​of the second device receiving the second signal using the first strategy to the first device, so that the first device, based on the received performance values, determines that the performance of the second device receiving the second signal using the first strategy meets the requirements, and thus determines to send the first signal.

[0177] In another alternative implementation, the fourth information indicates that the performance of the second device in receiving the second signal using the first strategy meets the requirements. That is, the second device directly informs the first device of the judgment result that "the performance of the second device in receiving the second signal using the first strategy meets the requirements," so that the first device can determine to send the first signal.

[0178] In an optional implementation, before the first device sends the first information, the method further includes: the first device sending seventh information, the seventh information indicating a third nonlinear interval of the first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship; the seventh information also indicating that a fourth input power is located within the third nonlinear interval, the fourth input power being the input power of the fifth signal to be sent, and the fifth signal being a reference signal. Correspondingly, the second device receives the seventh information. The first device sends the fifth signal. Correspondingly, in response to receiving the seventh information, the second device adopts a third strategy to receive the fifth signal, the third strategy corresponding to the third nonlinear interval. This process is similar to steps S101 and S102, and will not be described again.

[0179] The second device determines that the performance of receiving the fifth signal using the third strategy does not meet the requirements. The second device sends an eighth message, indicating that the performance of receiving the fifth signal using the third strategy with the third nonlinear interval does not meet the requirements. Upon receiving the eighth message, the first device adjusts the third nonlinear interval to obtain a first nonlinear interval. Then, the first device executes steps S101 and S102.

[0180] Alternatively, if the performance of the second device in receiving the fifth signal using the third strategy does not meet the requirements, it will not send the eighth information. If the first device does not receive the eighth information within the first time period, it adjusts the third nonlinear interval to obtain the first nonlinear interval. Then, the first device executes steps S101 and S102. The first time period can be predefined or configured and is not restricted.

[0181] Understandably, before the first device sends a signal to carry data, the first device and the second device can use a reference signal to determine, through one or more interaction processes, the nonlinear range in which the performance of the second device in receiving the signal using the corresponding strategy meets the requirements.

[0182] For example, the first device sends information 1, which indicates a nonlinear interval 1 and also indicates that the input power of the reference signal 1 to be transmitted is within the nonlinear interval 1. The first device transmits reference signal 1. The second device receives reference signal 1 using strategy 1 corresponding to the nonlinear interval 1. If the second device determines that the performance of receiving reference signal 1 using strategy 1 meets the requirements, the second device sends a fourth message; upon receiving the fourth message, the first device amplifies the power of the signal carrying the data within the nonlinear interval 1 and transmits it.

[0183] If the second device determines that the performance of receiving reference signal 1 using strategy 1 does not meet the requirements, the second device sends an eighth message. Upon receiving the eighth message, the first device adjusts the nonlinear interval 1 to obtain a nonlinear interval 2. The first device sends message 2, indicating the nonlinear interval 2 and also indicating that the input power of the reference signal 2 to be transmitted is within the nonlinear interval 2. The first device transmits reference signal 2. The second device receives reference signal 2 using strategy 2 corresponding to the nonlinear interval 2. If the second device determines that the performance of receiving reference signal 2 using strategy 2 meets the requirements, the second device sends a fourth message. Upon receiving the fourth message, the first device amplifies the power of the data-carrying signal within the nonlinear interval 2 and transmits it.

[0184] If the second device determines that the performance of receiving reference signal 2 using strategy 2 does not meet the requirements, the second device sends an eighth message. Upon receiving the eighth message, the first device adjusts the nonlinear interval 2 to obtain a nonlinear interval 3. Then, the first and second devices perform a similar process to that described above for nonlinear interval 3 to determine whether the performance of the second device receiving the reference signal using strategy 1 corresponding to nonlinear interval 3 meets the requirements, until the nonlinear interval adjusted by the first device enables the performance to meet the requirements. Within the nonlinear interval that enables the performance to meet the requirements, the first device amplifies the power of the signal carrying the data and transmits it.

[0185] Optionally, the second device may send the eighth information to the first device every time it receives a reference signal and the performance of receiving the reference signal does not meet the requirements, or the second device may select a specific time when it receives a reference signal and the performance of receiving the reference signal does not meet the requirements to send the eighth information to the first device, without any limitation.

[0186] In addition, in the embodiments of this application, the fourth and eighth information may be DCI, or may be carried in RRC signaling, or may be carried in MAC CE, and there are no restrictions on this.

[0187] In an optional implementation, after the first device sends the first signal, the method further includes: the first device sending fifth information, the fifth information indicating a second nonlinear range of the first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship; the fifth information also indicating that a third input power is located within the second nonlinear range, and the third input power is the input power of the third signal to be sent. Correspondingly, the second device receives the fifth information. The first device sends the third signal; correspondingly, in response to receiving the fifth information, the second device adopts a second strategy to receive the third signal, the second strategy corresponding to the second nonlinear range. This process is similar to steps S101 and S102, and will not be described again.

[0188] In summary, in this communication method, a first device sends first information indicating a first nonlinear range of a first power amplifier within the first device. Within this first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and this first input power is the input power of the first signal to be transmitted. The first device then sends a first signal. A second device, in response to receiving the first information, employs a first strategy to receive the first signal. This first strategy corresponds to the first nonlinear range.

[0189] As can be seen, in this method, the first device indicates to the second device the first nonlinear range of the first power amplifier, and indicates to the second device that the input power of the first signal to be transmitted by the first device is within the first nonlinear range, so that the second device can receive the first signal using a first strategy corresponding to the first nonlinear range. This method enables the first device to process the signal within the nonlinear range of the first power amplifier, allowing both the first and second devices to operate within the nonlinear range. Compared to reducing the signal power of the input power amplifier, the first device transmits a higher-power signal, improving signal coverage and communication performance. Furthermore, if the first device is located at an edge position far from the second device, the communication method provided in this application increases the power of the signal transmitted by the first device, which is beneficial for improving edge communication performance.

[0190] In addition, based on Figure 12 The communication method described above, in this application embodiment, also provides an exemplary communication method, such as... Figure 13 As shown. Figure 13 The communication method shown includes the following steps.

[0191] S201, the first device sends the second information. Correspondingly, the second device receives the second information.

[0192] The second information request specifies the nonlinear processing capability of the second device, which characterizes the second device's ability to receive and process signals processed by the first power amplifier in the first device within the nonlinear range.

[0193] S202, the second device sends the third information. Correspondingly, the first device receives the third information.

[0194] The third information indicates that the second device has nonlinear processing capability, and / or indicates the strength level of the nonlinear processing capability of the second device.

[0195] S203, The first device sends first information. Correspondingly, the second device receives the first information.

[0196] The first information indicates a first nonlinear range for the first power amplifier in the first device, within which the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in the radio frequency link. The first information also indicates that the second input power is located in the first nonlinear range, where the second input power is the input power of the second signal to be transmitted, and the second signal is a reference signal.

[0197] S204. The first device sends a second signal. Correspondingly, the second device adopts a first strategy to receive the second signal, the first strategy corresponding to the first nonlinear interval.

[0198] S205, The second device determines that the performance of receiving the second signal using the first strategy meets the requirements.

[0199] S206, the second device sends the fourth information. Correspondingly, the first device receives the fourth information.

[0200] Optionally, the fourth information indicates the first nonlinear interval. Alternatively, the fourth information includes performance values ​​of the second device receiving the second signal using the first strategy. Alternatively, the fourth information indicates that the performance of the second device receiving the second signal using the first strategy meets the requirements.

[0201] S207. The first device sends a first signal, which is a data-carrying signal, and the input power of the first signal is located in a first nonlinear range. Correspondingly, the second device adopts a first strategy to receive the first signal.

[0202] For a detailed explanation of each of the above steps, please refer to [link / reference]. Figure 12 The relevant descriptions of the communication method will not be repeated here.

[0203] To achieve the functions of the methods provided in the embodiments of this application, the network element / device may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0204] like Figure 14 As shown, this application embodiment provides a communication device 1400. The communication device 1400 can be a first device, or a component of the first device (e.g., an integrated circuit, a chip, a chip system, etc.). Alternatively, the communication device 1400 can be a second device, or a component of a second device (e.g., an integrated circuit, a chip, a chip system, etc.). The chip system can be composed of chips, or it can include chips and other discrete devices. The communication device 1400 can also be other communication units used to implement the methods in the method embodiments of this application. The communication device 1400 may include a processing unit 1401. Optionally, the communication device 1400 may further include a communication unit 1402, where the processing unit 1401 controls the communication unit 1402 to perform data / signaling transmission and reception. The communication unit 1402 may also be called a transceiver unit. Optionally, the communication unit 1402 may include a sending unit and a receiving unit; the sending unit can be used to send data / signaling, and the receiving unit can be used to receive data / signaling. Optionally, the communication device 1400 may also include a storage unit 1403, which can be used to store information and / or data and / or instructions, etc. The storage unit 1403 can interact with the processing unit 1401 or the communication unit 1402.

[0205] In one possible design, regarding the case where the communication device 1400 is used to implement the function of the first device in the above method embodiment:

[0206] Communication unit 1402 is used to transmit first information, which indicates a first nonlinear range of the first power amplifier in communication device 1400. Within the first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that the first input power is located within the first nonlinear range, and the first input power is the input power of the first signal to be transmitted. Communication unit 1402 is also used to transmit a first signal.

[0207] In another possible design, regarding the case where the communication device 1400 is used to implement the function of the second device in the above method embodiment:

[0208] Communication unit 1402 is configured to receive first information, which indicates a first nonlinear range of a first power amplifier in the first device. Within the first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and the first input power is the input power of a first signal. Communication unit 1402 is further configured to, in response to receiving the first information, employ a first strategy to receive a first signal, the first strategy corresponding to the first nonlinear range.

[0209] The embodiments of this application and the method embodiments shown above are based on the same concept and have the same technical effects. For the specific principles, please refer to the description of the embodiments shown above, which will not be repeated here.

[0210] This application also provides a communication device 1500, such as... Figure 15 As shown. The communication device 1500 can be a first device, or a chip, chip system, or processor that supports the first device in implementing the above-described method. Alternatively, the communication device 1500 can be a second device, or a chip, chip system, or processor that supports the second device in implementing the above-described method. This device can be used to implement the methods described in the above-described method embodiments, and for details, please refer to the description in the above-described method embodiments.

[0211] The communication device 1500 may include one or more processors 1501. The processor 1501 can be used to implement some or all of the functions of the terminal-side device or network-side device through logic circuits or by running computer programs. The processor 1501 may be a general-purpose processor or a special-purpose processor, etc. For example, it may be a baseband processor, digital signal processor, application-specific integrated circuit, field-programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, and the CPU can be used to control the communication device, execute software programs, and process data from the software programs. The communication device may be, for example, a base station, a baseband chip, a terminal, a terminal chip, a distributed unit (DU), or a central unit (CU), etc.

[0212] Optionally, the communication device 1500 may include one or more memories 1502, which may store instructions 1504 that can be executed on the processor 1501, causing the communication device 1500 to perform the methods described in the above method embodiments. Optionally, the memory 1502 may also store data. The processor 1501 and the memory 1502 may be provided separately or integrated together.

[0213] The memory 1502 may include, but is not limited to, non-volatile memory such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), ROM or compact disc read-only memory (CD-ROM), etc.

[0214] Optionally, the communication device 1500 may further include a transceiver 1505 and an antenna 1506. The transceiver 1505 may also be referred to as a transceiver unit, transceiver module, transceiver, transceiver circuit, input / output interface, etc., and is used to realize the transmission and reception functions of the communication device through the antenna. The transceiver 1505 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to realize the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to realize the transmitting function.

[0215] In one possible design, regarding the case where the communication device 1500 is used to implement the function of the first device in the above method embodiment:

[0216] Transceiver 1505 is used to transmit first information, which indicates a first nonlinear range of a first power amplifier in communication device 1500. Within the first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and the first input power is the input power of a first signal to be transmitted. Transceiver 1505 is also used to transmit a first signal.

[0217] In another possible design, regarding the case where the communication device 1500 is used to implement the function of the second device in the above method embodiment:

[0218] Transceiver 1505 is configured to receive first information, which indicates a first nonlinear range of a first power amplifier in a first device. Within this first nonlinear range, the input power and output power of the first power amplifier have a nonlinear relationship. The first power amplifier is a power amplifier in a radio frequency link. The first information also indicates that a first input power is located within the first nonlinear range, and this first input power is the input power of a first signal. Transceiver 1505 is further configured to, in response to receiving the first information, employ a first strategy to receive a first signal, the first strategy corresponding to the first nonlinear range.

[0219] In another possible design, the processor 1501 may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or for transmitting or relaying signals.

[0220] In another possible design, the processor 1501 may optionally store instructions 1503, which, when executed on the processor 1501, cause the communication device 1500 to perform the methods described in the above method embodiments. Instructions 1503 may be embedded in the processor 1501; in this case, the processor 1501 may be implemented in hardware.

[0221] In another possible design, the communication device 1500 may include circuitry that performs the functions of transmitting, receiving, or communicating as described in the foregoing method embodiments. The processor and transceiver described in this application embodiment can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0222] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can use various methods to implement the described functionality for a specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0223] The embodiments of this application and the above-described method embodiments are based on the same concept and have the same technical effects. For the specific principles, please refer to the description in the above-described method embodiments, which will not be repeated here.

[0224] This application also provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the functions of any of the above method embodiments.

[0225] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the functions of any of the above method embodiments.

[0226] This application also provides a computer program that, when run on a computer, implements the functions of any of the above method embodiments.

[0227] This application also provides a chip including a processor. The processor is used to execute code or instructions to implement the functions of any of the above method embodiments. Optionally, the chip further includes an interface, and the processor is coupled to the interface, which is used to receive or output signals.

[0228] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to 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 (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., SSDs), etc.

[0229] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0230] Furthermore, unless otherwise specified or logically conflicting, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0231] It is understood that some optional features in the various embodiments of this application may not depend on other features in certain scenarios, or may be combined with other features in certain scenarios, without limitation.

[0232] It is understood that the solutions in the embodiments of this application can be used in combination, and the explanations or descriptions of various terms, similar operations or steps appearing in the embodiments can be referenced or explained to each other in the various embodiments, and this application does not limit them.

[0233] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can mean: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b, and c. Here, a, b, and c can each be single or multiple.

[0234] In this application, the terms "first," "second," and various numerical designations are used for ease of description and are not intended to limit the scope of the embodiments of this application. For example, they may be used to distinguish different messages, rather than to describe a specific order or sequence. It should be understood that such descriptions can be interchanged where appropriate to describe solutions other than those described in this application.

[0235] In this application, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0236] In this application, "instruction" can include both direct and indirect instructions. When describing an instruction information A, it can include whether the instruction information directly or indirectly indicates A, but does not necessarily mean that the instruction information carries A.

[0237] In this application, "sending information to XX (device / network element)" can be understood as the destination of the information being that device / network element. This can include sending information directly or indirectly to that device / network element. "Receiving information from XX (device / network element), or receiving information from XX (device / network element)" can be understood as the source of the information being that device / network element. This can include receiving information directly or indirectly from that device / network element. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source.

[0238] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

Claims

1. A communication method characterized by comprising: The method applied to a first device comprises: sending first information, the first information indicating a first nonlinear interval of a first power amplifier in the first device, the first power amplifier being a power amplifier in a radio frequency link, the first nonlinear interval being an interval in which the first power amplifier has a nonlinear relationship between input power and output power, the first information further indicating that a first input power is located in the first nonlinear interval, the first input power being input power of a first signal to be sent; sending the first signal.

2. The method of claim 1, wherein: the first information indicates nonlinear power amplifier curve information corresponding to the first nonlinear interval; wherein the nonlinear power amplifier curve information comprises information representing a range of values of an independent variable corresponding to a nonlinear power amplifier curve, and a coefficient of a multiple term, a coefficient of a first term, and a constant term of the nonlinear power amplifier curve.

3. The method of claim 1 or 2, wherein: the first information indicates nonlinear power amplifier power information corresponding to the first nonlinear interval; wherein the nonlinear power amplifier power information comprises at least one of a numerical range of nonlinear power amplifier power or a maximum value of nonlinear power amplifier power.

4. The method of any one of claims 1 to 3, wherein: the first information indicates error vector magnitude information corresponding to the first nonlinear interval; wherein the error vector magnitude information comprises at least one of a numerical range of error vector magnitude or a maximum value of error vector magnitude.

5. The method of any one of claims 1 to 4, wherein: the first nonlinear interval is associated with at least one of a modulation and demodulation mode of the first signal, a precoding mode of the first signal, a waveform of the first signal, or channel state information used for transmission of the first signal.

6. The method according to any one of claims 1 to 5, characterized in that, Before sending the first information, the method further comprises: sending second information, the second information requesting nonlinear processing capability of the second device, the nonlinear processing capability of the second device being used to represent a receiving processing capability of the second device for a signal processed by the first power amplifier in the first device in a nonlinear interval; receiving third information, the third information indicating that the second device has nonlinear processing capability, and / or indicating a strength level of the nonlinear processing capability of the second device.

7. The method of claim 6, wherein, The method further comprises: in a case where the third information indicates the strength level of the nonlinear processing capability of the second device, determining the first nonlinear interval matching the strength level of the nonlinear processing capability of the second device.

8. The method of any one of claims 1 to 7, wherein: the first information further indicates that a second input power is located in the first nonlinear interval, the second input power being input power of a second signal to be sent, the second signal being a reference signal; the first signal is used to carry data; before sending the first signal, the method further comprises: sending the second signal; receiving fourth information, the fourth information being used by the first device to determine sending the first signal.

9. The method of claim 8, wherein the fourth information indicates the first non-linear interval. Or, the fourth information comprises a performance value of the second device receiving the second signal by using a first strategy, the first strategy corresponding to the first non-linear interval. Or, the fourth information indicates that a performance of the second device receiving the second signal by using a first strategy meets a requirement, the first strategy corresponding to the first non-linear interval. The method further comprises: sending fifth information, the fifth information indicating a second non-linear interval of the first power amplifier in the first device, the second non-linear interval being an interval in which the first power amplifier has a non-linear relationship between input power and output power, and the fifth information further indicating that a third input power is located in the second non-linear interval, the third input power being input power of a third signal to be sent; sending the third signal.

10. The method according to any one of claims 1 to 9, characterized in that, The method applied to a second device comprises: receiving first information, the first information indicating a first non-linear interval of a first power amplifier in a first device, the first non-linear interval being an interval in which the first power amplifier has a non-linear relationship between input power and output power, the first power amplifier being a power amplifier in a radio frequency link, and the first information further indicating that a first input power is located in the first non-linear interval, the first input power being input power of a first signal; in response to receiving the first information, receiving the first signal by using a first strategy, the first strategy corresponding to the first non-linear interval.

11. A communication method, comprising:

12. The method of claim 11, wherein the first information indicates non-linear power amplifier curve information corresponding to the first non-linear interval, and wherein the non-linear power amplifier curve information comprises information representing a range of values of an independent variable corresponding to a non-linear power amplifier curve, and coefficients of multiple terms, a coefficient of a first term, and a constant term of the non-linear power amplifier curve.

13. The method of claim 11 or 12, wherein the first information indicates error vector magnitude information corresponding to the first non-linear interval, and wherein the error vector magnitude information comprises at least one of a numerical range of error vector magnitude or a maximum value of error vector magnitude.

14. The method of any one of claims 11 to 13, wherein the first non-linear interval is associated with at least one of a modulation and demodulation mode of the first signal, a precoding mode of the first signal, a waveform of the first signal, or channel state information used for transmitting the first signal. Before the receiving the first information, the method further comprises: receiving second information, the second information requesting a non-linear processing capability of the second device, the non-linear processing capability of the second device being used to represent a receiving processing capability of the second device for a signal processed by the first power amplifier in the first device in a non-linear interval; and sending third information, the third information indicating that the second device has the non-linear processing capability, and / or indicating a strength level of the non-linear processing capability of the second device. ​ ​ ​ ​ ​ 15. The method according to any one of claims 11 to 14, characterized in that, ​ ​ ​ 16. The method of any of claims 11-15, wherein the first information further indicates that a second input power is in the first non-linear region, the second input power being an input power of a second signal to be transmitted, the second signal being a reference signal. the first signal is used to carry data. Before the first signal is received, the method further comprises: in response to receiving the first information, receiving the second signal using the first strategy; in a case that a performance of receiving the second signal using the first strategy meets a requirement, sending fourth information.

17. The method of claim 16, wherein the fourth information indicates the first non-linear region. or, the fourth information comprises a performance value of receiving the second signal using a first strategy by the second device, the first strategy corresponding to the first non-linear region. or, the fourth information indicates that a performance of receiving the second signal using a first strategy by the second device meets a requirement, the first strategy corresponding to the first non-linear region. the method further comprises: receiving fifth information, the fifth information indicating a second non-linear region of the first power amplifier in the first device, the second non-linear region being a region in which the first power amplifier has a non-linear relationship between an input power and an output power, the fifth information further indicating that a third input power is in the second non-linear region, the third input power being an input power of a third signal; 18. The method according to any one of claims 11 to 17, characterized in that, in response to receiving the fifth information, receiving the third signal using a second strategy, the second strategy corresponding to the second non-linear region. comprising a module or unit for implementing the method of any of claims 1-10, or comprising a module or unit for implementing the method of any of claims 11-18. comprising:

19. A communications device, characterized by a processor; 20. A communications device, characterized by a memory coupled to the processor, the memory storing computer programs or instructions; when the computer programs or instructions are run by the processor, the method of any of claims 1-10 is implemented, or the method of any of claims 11-18 is implemented. the computer readable storage medium stores computer programs, when the computer programs are run, the method of any of claims 1-10 is implemented, or the method of any of claims 11-18 is implemented. computer program codes, when the computer program codes are run, the method of any of claims 1-10 is implemented, or the method of any of claims 11-18 is implemented.

21. A computer-readable storage medium, characterized in that, ​ 22. A computer program product, the computer program product comprising: ​

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