Communication method and communication apparatus

Abstract

The present application is applicable to the field of communications, and provides a communication method and a communication apparatus. In the technical solution provided by the present application, decoupling a signal for nonlinear estimation from a signal for channel estimation can prevent a nonlinear estimation result from being affected by channel estimation, such that the accuracy of the nonlinear estimation result can be improved, thereby improving the accuracy of nonlinear compensation of data, ultimately improving the transmission performance of the data.

Description

Communication method and communication apparatus

[0001] The present application claims priority to the Chinese Patent Application No. 202411381385.0, filed on September 27, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a communication method and a communication apparatus. BACKGROUND

[0003] In order to reduce the influence of the nonlinear characteristics of the power amplifier (PA) of the data sending end on the demodulation performance of the data receiving end, and improve the reliability and efficiency of data transmission, the data receiving end needs to estimate the influence of the nonlinear characteristics of the power amplifier on data transmission, i.e., nonlinear estimation, and perform nonlinear compensation on the received data based on the nonlinear estimation result.

[0004] A method of nonlinear estimation is as follows: the data sending end sends a demodulation reference signal (DMRS), the data receiving end receives the DMRS, performs channel estimation based on the DMRS, performs channel equalization on the received DMRS based on the channel estimation result, and then performs nonlinear estimation on the DMRS after channel equalization and the DMRS generated by the data receiving end to obtain a nonlinear estimation result. The data sending end sends data, and the data receiving end receives the data, performs nonlinear compensation on the received data based on the nonlinear estimation result.

[0005] However, the above method has the problem that the nonlinear estimation result is inaccurate, which leads to inaccurate nonlinear compensation result of the data, and finally leads to inaccurate data. SUMMARY

[0006] The communication method and the communication apparatus provided by the present application can solve the problem of inaccurate nonlinear compensation result of the data, and improve the reliability of data transmission.

[0007] In a first aspect, the present application provides a communication method, which can be executed by a network device, or by a module (such as a processor, a chip, or a chip system, etc.) applied to the network device, or by a logic node, a logic module, or software capable of realizing all or part of the functions of the network device.

[0008] The method comprises: generating first information, the first information being used to indicate a first sending parameter of a first signal, the first signal being used for nonlinear estimation, a time domain resource of the first signal not overlapping a time domain resource of a second signal, the second signal being used for channel estimation; and sending the first information.

[0009] In the prior art, after channel estimation and channel equalization are performed on the signals received on the same time domain resource, nonlinear estimation is performed on the signals obtained through channel equalization. Channel estimation and channel equalization can destroy the nonlinear influence on the signals, resulting in inaccurate nonlinear estimation results of the signals obtained through channel equalization, and further resulting in inaccurate nonlinear compensation results of the data using the nonlinear estimation results.

[0010] In the communication method provided in the present application, the time domain resource of the signal used for channel estimation and the time domain resource of the signal used for nonlinear estimation do not overlap, that is, the signal used for nonlinear estimation is not the same as the signal used for channel estimation. Therefore, the signal used for nonlinear estimation does not need to be subjected to channel estimation and channel equalization before nonlinear estimation, so that the nonlinear estimation results are not affected by channel estimation and channel equalization, thereby improving the accuracy of the nonlinear estimation results, and ultimately improving the accuracy of the nonlinear compensation of the data.

[0011] In addition, in the communication method provided in the present application, the network device indicates the sending parameter of the signal used for nonlinear estimation to the terminal device, so that the terminal device can be flexibly provided with parameter information of the signal used for nonlinear estimation based on the demand, thereby improving the accuracy of the nonlinear estimation.

[0012] In a possible design, the first sending parameter comprises at least one of the following parameters: a time domain position, a frequency position, a power backoff amount, or a symbol number.

[0013] In a possible design, the first sending parameter comprises a first power backoff amount. Accordingly, the communication method provided in the present application further comprises: sending second information, the second information being used to indicate a second sending parameter of the first signal, the second sending parameter comprising a second power backoff amount, the first power backoff amount and the second power backoff amount being different.

[0014] In this implementation, the network device configures multiple power backoff amounts for the first signal used for nonlinear estimation, so that the terminal device can send the first signal with multiple power backoff amounts, thereby obtaining nonlinear estimation results in more power backoff amount scenarios, and further improving the accuracy of the nonlinear estimation results.

[0015] In a possible design, the first information includes indexes of the first transmission parameters. As compared with the first information including values of each of the first transmission parameters, the first information indicating the indexes of the first transmission parameters can save signaling overhead.

[0016] In a possible design, the first signal is a data signal, that is, the signal used for the nonlinear estimation is a signal carrying service data. Optionally, the parameters indicated by the first information include modulation and coding strategies. In this way, the coding performance of the data can be improved, and therefore the transmission reliability of the data can be improved, so as to improve the accuracy of the nonlinear estimation result.

[0017] In a possible design, the first signal is a reference signal, that is, the signal used for the nonlinear estimation is a signal carrying a preset sequence. Optionally, the parameters indicated by the first information include a sequence type and / or a sequence type generation related parameter. In this way, the signal used for the nonlinear estimation can be flexibly transmitted based on requirements, and therefore the accuracy of the nonlinear estimation can be improved.

[0018] In a possible design, the first signal and the second signal are both reference signals, and the sequence generation manners of the first signal and the second signal are different.

[0019] The nonlinear estimation is implemented by using the reference signal, and as compared with implementing the nonlinear estimation by using the data signal, the implementation complexity of the nonlinear estimation can be reduced.

[0020] The channel estimation and the nonlinear estimation are implemented by using different types of reference signals, and different types of reference signals can be selected for different estimation requirements, so as to meet the accuracy requirements of different types of estimation.

[0021] In a possible design, the first signal and the second signal are both reference signals, and the sequence generation manners of the first signal and the second signal are the same. The channel estimation and the nonlinear estimation are implemented by using the same type of reference signal, and therefore the complexity can be reduced.

[0022] In a second aspect, a communication method is provided. The method can be performed by a terminal device, a module (e.g., a processor, a chip, or a chip system) applied to the terminal device, or a logic node, a logic module, or software that can implement all or part of the functions of the terminal device.

[0023] The method includes: receiving first information, the first information being used to indicate first transmission parameters of a first signal, the first signal being used for nonlinear estimation, and a time resource of the first signal not overlapping with a time resource of a second signal, the second signal being used for channel estimation; and sending, based on the first information, the first signal to a network device.

[0024] The technical effects brought by the second aspect can refer to the technical effects brought by the first aspect, and will not be described herein.

[0025] In a possible design, the first sending parameter includes at least one of a time domain position, a frequency position, a power backoff amount, or a quantity of symbols.

[0026] In a possible design, the first sending parameter includes a first power backoff amount. The communication method provided in this application further includes: receiving second information, the second information being used to indicate a second sending parameter of the first signal, the second sending parameter including a second power backoff amount, and the first power backoff amount being different from the second power backoff amount; and sending the first signal according to the second information.

[0027] In a possible design, the first signal is not precoded. Based on this scheme, the influence of precoding on the nonlinear estimation can be avoided, and the accuracy of the nonlinear estimation result can be improved.

[0028] In a third aspect, the present application provides a communication apparatus for implementing the above-described various methods. The communication apparatus can be the network device in the first aspect, or an apparatus including the network device; or the communication apparatus can be the terminal device in the second aspect, or an apparatus including the terminal device. The communication apparatus includes modules, units, or means corresponding to the above-described methods, which can be implemented by hardware, software, or by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the above-described functions.

[0029] In a fourth aspect, the present application provides a communication apparatus, including: a processor and a memory; the memory is used to store computer instructions, when the processor executes the instructions, to make the communication apparatus execute the method in any of the above aspects. The communication apparatus can be the network device in the first aspect or an apparatus including the network device; or the communication apparatus can be the terminal device in the second aspect or an apparatus including the terminal device.

[0030] In a fifth aspect, the present application provides a communication apparatus, including: a processor; the processor is used to be coupled with a memory, and read instructions in the memory, and then execute the method in any of the above aspects according to the instructions. The communication apparatus can be the network device in the first aspect or an apparatus including the network device; or the communication apparatus can be the terminal device in the second aspect or an apparatus including the terminal device.

[0031] In a sixth aspect, the present application provides a computer readable storage medium, which stores instructions, when the instructions are run on a computer, the computer can execute the method in any of the above aspects.

[0032] In a seventh aspect, the present application provides a computer program product, which contains instructions, when the instructions are run on a computer, the computer can execute the method in any of the above aspects.

[0033] In an eighth aspect, the present application provides a communication apparatus (for example, the communication apparatus can be a chip or a chip system), which comprises a processor, and the processor is configured to implement the functions in any of the above aspects. In a possible design, the communication apparatus further comprises a memory, and the memory is configured to store necessary program instructions and data. When the communication apparatus is a chip system, the communication apparatus can be composed of a chip or can comprise a chip and other discrete devices.

[0034] The technical effects brought by any of the designs in the third aspect to the eighth aspect can refer to the technical effects brought by any of the designs in the first aspect to the second aspect, which will not be repeated here.

[0035] In a ninth aspect, the present application provides a communication system, which comprises the network device in the above aspect and the terminal device in the above aspect. BRIEF DESCRIPTION OF DRAWINGS

[0036] FIG. 1 is an example diagram of a communication system to which embodiments of the present application are applicable;

[0037] FIG. 2 is a signal transmission flowchart provided by the prior art;

[0038] FIG. 3 is another signal transmission flowchart provided by the prior art;

[0039] FIG. 4 is an example diagram of a communication method according to an embodiment of the present application;

[0040] FIG. 5 is a configuration diagram of a sending parameter according to an embodiment of the present application;

[0041] FIG. 6 is an example diagram in which a NERS occupies one symbol according to an embodiment of the present application;

[0042] FIG. 7 is an example diagram in which a NERS occupies two symbols according to an embodiment of the present application;

[0043] FIG. 8 is a signal transmission flowchart in which a signal is not subjected to precoding for non-linear estimation according to an embodiment of the present application;

[0044] FIG. 9 is a structure diagram of a communication apparatus according to an embodiment of the present application;

[0045] FIG. 10 is a structural schematic diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, unless otherwise specified, “ / ” represents an “or” relationship between the associated objects, for example, A / B can represent A or B; “and / or” in the present application is only a description of the associated relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A alone, A and B together, and B alone, where A and B can be singular or plural. In addition, in the description of the present application, unless otherwise specified, “multiple” means two or more than two. “At least one of the following” or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0047] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, “first”, “second” and the like are used to distinguish the same or similar items with basically the same function and role. Those skilled in the art can understand that “first”, “second” and the like do not limit the quantity and execution order, and “first”, “second” and the like do not necessarily mean different. At the same time, in the embodiments of the present application, “exemplary” or “for example” means example, illustration or description. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, “exemplary” or “for example” is used to present the relevant concept in a specific manner, and to facilitate understanding.

[0048] In addition, the network architecture and business scenarios described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0049] The technical solutions of the present application are applicable to wireless communication systems, such as a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) system, a satellite communication system, a future mobile communication system, or a converged system of multiple systems, and the like.

[0050] The technical solutions provided in the present application 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.

[0051] A network element in a communication system can send or receive a signal to or from another network element. The signal can include information, signaling, or data, and the like. The network element can also be replaced by an entity, a network entity, a device, a communication device, a communication module, a node, a communication node, and the like. In the present application, a device is taken as an example for description. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0052] In the embodiments of the present application, the terminal device can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus.

[0053] The terminal device can be a device providing voice / data, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone, tablet computer, notebook computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0054] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a device that realizes powerful functions through software support and data interaction and cloud interaction. The general wearable smart device includes devices with full functions, large size, and the ability to realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used in cooperation with other devices, such as smart phones, such as various smart wristbands and smart jewelry for monitoring vital signs.

[0055] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system, which can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the embodiments of the present application, only the device for implementing the function of the terminal device is taken as an example for description, and the scheme of the embodiments of the present application is not limited.

[0056] To facilitate understanding of the method provided by the embodiments of the present application, the system architecture of the method provided by the embodiments of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is used to more clearly illustrate the scheme of the embodiments of the present application, and does not constitute a limitation on the scheme provided by the embodiments of the present application.

[0057] FIG. 1 is an example diagram of a communication system to which the embodiments of the present application are applicable. The communication system includes a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1, collectively referred to as 110) and at least one terminal (e.g., 120a-120j in FIG. 1, collectively referred to as 120). The RAN can further include other RAN nodes, such as a wireless relay device and / or a wireless backhaul device, etc. The terminal 120 is connected to the RAN node 110 in a wireless manner. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0058] The RAN 100 can be a 3rd generation partnership project (3GPP)-related cellular system, such as a 4G, 5G mobile communication system, an NTN (non-terrestrial network) system, or a future-oriented evolution system (e.g., a future communication network system). The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system, and can also be a communication system in which two or more of the above systems are integrated.

[0059] Exemplarily, the terminal 120 can also be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely applied to various scenarios, such as device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. Embodiments of the present application do not limit the device form of the terminal.

[0060] Exemplarily, the RAN node 110, which can also be referred to as an access network device, a network device, a RAN entity or an access node, etc., constitutes a part of the communication system, and helps the terminal to realize wireless access. The plurality of RAN nodes 110 in the communication system 1000 can be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative, for example, the network element 120i in FIG. 1 can be a helicopter or a drone, which can be configured as a mobile base station. For those terminals 120j accessing the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN node 110 and the terminal 120 are sometimes both referred to as communication apparatuses, for example, the network elements 110a and 110b in FIG. 1 can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal functions.

[0061] In a possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a future communication network system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU).

[0062] For example, the core network device can refer to a device in a core network (CN) that provides service support for a terminal. Currently, some examples of the core network device are: an access and mobility management function (AMF) entity, a session management function (SMF) entity, a user plane function (UPF) entity, and the like, which are not listed one by one here. Among them, the AMF entity can be responsible for access management and mobility management of the terminal; the SMF entity can be responsible for session management, such as session establishment of a user; and the UPF entity can be a functional entity of a user plane, mainly responsible for connecting an external network. It should be noted that the entity in the present application can also be referred to as a network element or a functional entity, for example, the AMF entity can also be referred to as an AMF network element or an AMF functional entity, and for another example, the SMF entity can also be referred to as an SMF network element or an SMF functional entity, and the like.

[0063] With the continuous development of network technology, more and more new applications are emerging, such as truly immersive (XR), high-fidelity mobile hologram (HFMH), and digital replicas, which have higher requirements for data transmission rate.

[0064] To meet the data transmission rate requirement of these new applications, it is necessary to use higher modulation order to transmit signals, such as 256 quadrature amplitude modulation (QAM) and 1024 QAM, etc. Generally, in order to send signals of higher modulation order, higher transmission power needs to be used to ensure a proper signal-to-noise ratio. However, with the increase of transmission power, the nonlinear characteristics of the PA will become more pronounced, which will distort the signal during uplink signal transmission, seriously affecting the error vector magnitude (EVM) of the signal. Although digital pre-distortion technology can solve the PA nonlinear problem, during uplink signal transmission, the terminal usually does not have the ability of digital pre-distortion calibration due to cost and other reasons. Therefore, when the terminal pushes up the transmission power, the EVM of the signal will be seriously deteriorated, which will affect the demodulation performance of the data receiving end.

[0065] In the prior art, the data receiving end mainly realizes channel estimation and nonlinear estimation based on the demodulation reference signal (DMRS), and its data processing flow chart is shown in FIG. 2. The specific implementation steps are as follows: the terminal pre-encodes and waveform modulates the data and the DMRS respectively, and inputs the waveform modulated data and DMRS into the power amplifier for power amplification processing, and then transmits the processed data and DMRS to the data receiving end through the channel. Correspondingly, after the data receiving end receives the data and the DMRS, it first performs waveform demodulation on the received data and DMRS, and then performs channel estimation based on the waveform demodulated DMRS and the DMRS generated by the data receiving end (which can also be referred to as the local DMRS), and then performs channel equalization on the data and the DMRS based on the channel estimation result, and then performs nonlinear estimation based on the channel equalized DMRS and the DMRS generated by the data receiving end to obtain a nonlinear estimation result, and performs nonlinear compensation and data monitoring on the channel equalized data based on the nonlinear estimation result.

[0066] In the prior art, since the channel estimation and the nonlinear estimation are tightly coupled, there is a certain limitation. Since the DMRS will first pass through the PA and be affected by the nonlinearity of the PA during transmission, and then pass through the channel and be affected by the interference of the channel, while the DMRS generated by the data receiving end has not been processed by the PA, the channel estimation result based on the DMRS deviates from the real channel, which further affects the subsequent nonlinear estimation, resulting in inaccurate nonlinear estimation result. Especially in the high power transmission scenario, the nonlinearity of the PA is more serious, and the influence of this coupling effect is also more significant.

[0067] Furthermore, in existing technologies, channel estimation and equalization are performed based on DMRS, followed by nonlinear estimation based on the equalized DMRS and the DMRS generated by the data receiver. However, under arbitrary precoding conditions, there is no linear relationship between the equalized DMRS and the PA-equipped DMRS, leading to inaccurate nonlinear estimation results.

[0068] The following description uses a single-port case as an example to illustrate the signal processing for the arbitrary precoding scenarios described above. The signal processing flow is shown in Figure 3. Specifically, assume that signal s is transmitted on subcarrier k. k The terminal responds to signal s k Precoding is performed, with precoding coefficients a. k Next, the terminal performs an inverse fast fourier transform (IFFT) on the precoded signal, and inputs the output signal x(t) into the power amplifier (PA) for power amplification, then outputs the signal f(x(t)). The expression for x(t) can be found in Equation 1. Finally, the terminal sends the output signal f(x(t)) to the data receiver.

[0069] In the formula, This indicates that the inverse Fourier transform of the signal is performed.

[0070] Accordingly, after receiving the signal f(x(t)), the data receiver performs channel estimation, fast fourier transform (FFT), and channel equalization (EQ) processing on the signal f(x(t)) in sequence to obtain the channel-equalized signal. Then the signal Perform an inverse fast Fourier transform to finally output the signal z(t). The ideal channel estimation is as follows: The expression for signal z(t) can be found in Formula 2.

[0071] In the formula, This indicates that the inverse Fourier transform of the signal is performed. This indicates that a Fourier transform is performed on the signal.

[0072] Generally, there is a linear relationship between z(t) and f(x(t)), so z(t) can be used to approximate the output of PA. However, in precoding a k The relationship between z(t) and f(x(t)) is not linear when the carrier wave varies. In precoding a k When they are equal on all subcarriers, i.e., ak = a, z(t) and f(x(t)) have a linear relationship, and the specific expression can refer to Equation Three.

[0073] To solve one or more of the above problems, the present application provides a new technical solution.

[0074] The following describes the communication method provided by the embodiments of the present application, taking the interaction between the network device and the terminal device shown in FIG. 1 as an example.

[0075] It should be noted that the names of messages between various network elements in the following embodiments of the present application or the names of parameters in the messages are only examples, and other names can also be used in specific implementation, which is not limited in the embodiments of the present application.

[0076] FIG. 4 is a communication method provided by an embodiment of the present application. The communication method includes S410 and S420.

[0077] S410, the network device sends first information, the first information is used to indicate a first sending parameter of a first signal, the first signal is used for nonlinear estimation, and a time domain resource of the first signal does not overlap with a time domain resource of a second signal, the second signal is used for channel estimation. Correspondingly, the terminal device receives the first information.

[0078] It can be understood that the network device generates the first information before sending the first information.

[0079] Optionally, the first sending parameter in the embodiments of the present application can include at least one of the following parameters: a time domain position, a frequency position, a power backoff amount, or a symbol number.

[0080] In some implementations, the first sending parameter includes the time domain position, the frequency position, the power backoff amount, and the symbol number.

[0081] In some implementations, the first sending parameter includes part of the time domain position, the frequency position, the power backoff amount, and the symbol number. In this implementation, the parameters not included in the first sending parameter can be pre-negotiated, pre-configured, or agreed by the network device and the terminal device.

[0082] Optionally, in the embodiments of the present application, the time domain position is used to represent the position of the first signal on the time axis, and can include one or more of the following information: the start time of the first signal in a measurement period, the duration, and the delay or offset at a specific time, which is not limited in the embodiments of the present application.

[0083] Optionally, in embodiments of the present application, the frequency position is used to represent the position of the first signal in the system bandwidth, and can include one or more of the carrier frequency of the first signal, the signal bandwidth, the spectral characteristic, and the specific frequency offset, which are not specifically limited in embodiments of the present application.

[0084] Optionally, in embodiments of the present application, the power backoff amount is used to represent the power level by which the output power of the first signal is reduced relative to the maximum allowed output power of the power amplifier of the terminal device.

[0085] Optionally, in embodiments of the present application, the number of symbols is used to represent the number of symbols carrying the first signal. For example, the number of symbols can be 1, 2, 3, or more, which are not specifically limited in embodiments of the present application.

[0086] In some implementations, the number of symbols occupied by the first signal does not exceed a preset threshold N Nlexploremax , so as to reduce the resource overhead consumed for nonlinear estimation. As an example, N Nlexploremax is 4.

[0087] Optionally, in embodiments of the present application, the time domain resource of the first signal and the time domain resource of the second signal do not overlap, including that the time domain resource of the first signal and the time domain resource of the second signal at least partially do not overlap.

[0088] In the present embodiment, the first signal is used for nonlinear estimation, and the second signal is used for channel estimation, and the time domain resource of the first signal and the time domain resource of the second signal do not overlap, which can be understood as that the signal used for channel estimation and the signal used for nonlinear estimation are not the same signal.

[0089] Optionally, in embodiments of the present application, the first signal can be a data signal or a reference signal.

[0090] Optionally, when the first signal is a data signal, the at least one parameter indicated by the first information further includes a modulation and coding scheme (MCS).

[0091] Optionally, in the embodiments of the present application, the MCS is used to represent the modulation mode and channel coding strategy of the data signal. The modulation mode can be quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (16QAM), 64 quadrature amplitude modulation (64QAM), etc., and the channel coding strategy can be Turbo code, low density parity check code (LDPC), etc. The embodiments of the present application do not make specific limitation on the modulation mode and channel coding strategy.

[0092] Optionally, when the first signal is a reference signal, the at least one reference indicated by the first information further includes a sequence type and / or sequence generation related parameter.

[0093] Optionally, in the embodiments of the present application, the data signal can be an analog signal or a digital signal for transmitting data information, and the embodiments of the present application do not make specific limitation thereon.

[0094] Optionally, when the first signal is a reference signal, the first signal can be a DMRS, a sounding reference signal (SRS), a channel state information-reference signal (CSI-RS), etc., and the embodiments of the present application do not make specific limitation thereon.

[0095] Optionally, when the first signal is a reference signal, the first signal is a reference signal defined specially for non-linear estimation, which is referred to as a non linearity estimate reference signal (NERS).

[0096] Optionally, when the first signal is a reference signal, for example, when the first signal is a NERS, the sequence of the first signal is a pseudo-noise (PN) sequence, a degenerate phase model assigning (DPMA) or a zadoff-chu (ZC) sequence.

[0097] Exemplarily, the generation process of the DPMA sequence is as follows:

[0098] 1. Factorize the DPMA sequence with a length of N. The expression of the factorization can refer to the following Formula Four.

[0099] wherein A j ≥ 2 and cannot be a prime number. Assuming A j is arranged in descending order, to determine the unique factorization, the largest factorization solution is selected.

[0100] 2, the sequence element position index n is expressed as a w-bit number, each bit from low to high is expressed by l m , l m ∈ [1, A m -1], from which the following formula five and formula six can be obtained. n=∑ m l m φ m ( formula six )

[0101] 3, the expression of the guide sequence v can refer to the following formula seven. v=[v0,…,v w-1 ] ( formula seven )

[0102] wherein v m ∈ [1, A m -1].

[0103] 4, the expression of the sequence x[n] of the final generated DPMA can refer to the following formula eight. x[n]=x[∑ m l m φ m ]=exp{j∑θ m [l m ]} ( formula eight )

[0104] wherein,

[0105] It can be understood that after the factorization relationship is determined, the guide sequence determines the finally generated sequence, the generation mode of the set of guide sequences can be agreed, and the index of the guide sequence in the set is indicated by the guide sequence. log2Ψ bits are required. For example, v=[v0,…,v w-1 ], v m ∈ [1, A m -1] from right (low) to left (high), the low bit is full traversed once, and the adjacent high bit takes the next value; until all possible values are traversed.

[0106] Optionally, the second signal can be DMRS, SRS, CSI-RS or NERS, which is not limited in the embodiment of the application.

[0107] Optionally, when the first signal and the second signal are both NERS, the sequence type and / or sequence generation related parameters of the first signal and the second signal are not equal. ​

[0108] When both the first signal and the second signal are NERS, optionally, the sequence of the first signal adopts a sequence with a high peak to average power ratio (PAPR), for example, a PN sequence or a DPMA sequence; and the sequence of the second signal adopts a ZC sequence.

[0109] Under the same average power, the DPMA sequence can obtain a larger peak to average power ratio, and has a larger range of capturing nonlinearity. The PN sequence has a PAPR comparable to data, and has a moderate range of capturing nonlinearity.

[0110] In order to reduce the signaling overhead of the network device in issuing the first information, in some implementations, preset first transmission parameters are defined with a number or an index, and the network device indicates the value of the first transmission parameter by indicating the number. Table 1 is an example in which the first transmission parameter includes a power backoff amount, an MCS, and a symbol number.

[0111] Table 1

[0112] Based on Table 1, if the first information indicates the number "1", it is equivalent to indicating that the power backoff amount P is 5 dB, the symbol number is 2, and the MCS is equal to 20.

[0113] Table 2 is an example in which the first transmission parameter includes a sequence type, a power backoff amount, and a symbol number.

[0114] Table 2

[0115] Based on Table 2, if the first information indicates the number "2", it is equivalent to indicating that the sequence type is DPMA, the power backoff amount P is 0 dB, and the symbol number is 2.

[0116] In S420, the terminal device transmits the first signal based on the first information. Correspondingly, the network device receives the first signal.

[0117] Optionally, in the embodiments of the present application, the terminal device can transmit the first signal to the network device based on at least one transmission parameter indicated by the first information, such as a time domain position, a frequency position, a power backoff amount, a sequence type, a sequence generation related parameter, or a symbol number.

[0118] In some implementations, the first information indicating the power backoff amount can be replaced by the first information indicating the transmission power.

[0119] In the embodiments, it can be understood that the terminal device also transmits the second signal. Correspondingly, the network device receives the second signal.

[0120] In some implementations, the network device configures a power backoff amount of the second signal or configures a transmission power of the second signal. The terminal transmits the second signal based on the power configured by the network device.

[0121] In some implementations, the terminal device transmits the second signal with a power that is as small as possible to reduce the nonlinear effect of the second signal on the power amplifier.

[0122] For example, the terminal device can transmit the second signal with high-order modulation, so that the signal-to-noise ratio of the channel environment of the second signal is good, and the network device can still obtain good channel estimation in combination with the channel estimation enhancement algorithm even if the terminal device appropriately reduces the power of the second signal.

[0123] When the first signal is a data signal, in some implementations, after receiving the second signal, the network device performs channel estimation based on the second signal to obtain a channel estimation result, the channel estimation result is used to perform channel equalization on the first signal to obtain a channel equalization result; the channel equalization result is decoded to obtain a decoding result, and a signal equivalent to the first signal input to the power amplifier of the terminal device is reconstructed; nonlinear estimation is performed on the channel equalization result and the reconstructed signal to obtain a nonlinear estimation result, and the nonlinear estimation result is used to perform nonlinear compensation on the data, thereby improving the reception reliability of the data.

[0124] When the first signal is a reference signal, in some implementations, after receiving the second signal, the network device performs channel estimation based on the second signal to obtain a channel estimation result, the channel estimation result is used to perform channel equalization on the first signal to obtain a channel equalization result; a reference signal sequence is generated, and a signal equivalent to the first signal input to the power amplifier of the terminal device is reconstructed; nonlinear estimation is performed on the channel equalization result and the reconstructed signal to obtain a nonlinear estimation result, and the nonlinear estimation result is used to perform nonlinear compensation on the data, thereby improving the reception reliability of the data.

[0125] The embodiment decouples the nonlinear estimation and the channel estimation, avoids mutual influence, improves the probability of obtaining accurate nonlinear estimation, and thus can improve the accuracy of nonlinear compensation and ultimately improve the transmission reliability of the data.

[0126] In some implementations of the present application, the first transmission parameter of the first signal is predefined, for example, the first transmission parameter of the first signal is predefined by a protocol, and the terminal device transmits the first signal based on the predefined first transmission parameter.

[0127] In some implementations of the embodiment, for example, when the first signal is a data signal, the smaller the transmission power of the first signal, the higher the MCS can be, so that the accuracy of the decoding result can be ensured, and thus the accuracy of the nonlinear estimation result can be ensured.

[0128] In some implementations of the present application, a plurality of groups of transmission parameters can be configured for the first signal, and at least one transmission parameter in different groups of transmission parameters is different.

[0129] For example, the network device transmits second information, the second information being used to indicate a second transmission parameter of the first signal, the second transmission parameter including a second power backoff amount, the first power backoff amount and the second power backoff amount being different. The first transmission parameter and the second transmission parameter are different groups of transmission parameters.

[0130] When the power backoff amounts in different groups are different, the MCSs can be equal or different. In some implementations, when the first power backoff amount is greater than the second power backoff amount, the first MCS in the first transmission parameter is less than or equal to the second MCS in the second transmission parameter.

[0131] The following describes three groups of transmission parameters when the first signal is a data signal. The three groups of transmission parameters correspond to three groups of data. The three groups of transmission parameters are denoted as a first transmission parameter, a second transmission parameter and a third transmission parameter, and the corresponding group numbers are denoted as x, y and z. Each group of transmission parameters can be independently configured with at least one of the number of symbols, the power backoff amount and the MCS.

[0132] FIG. 5 is a configuration diagram of three groups of transmission parameters according to an embodiment of the present application. As shown in FIG. 5, for the transmission parameter of data close to the DMRS (group number x), a relatively large backoff amount (denoted as P x ) is specified, but it will still be less than the maximum backoff amount allowed by the protocol to ensure that the PA can transmit higher power; correspondingly, group x selects the MCS corresponding to the medium-low code rate in the currently scheduled modulation order (denoted as M x ), for example, when the modulation order is 256QAM, the MCS less than 0.75 code rate is selected to ensure that the data of group x can be correctly demodulated with a high probability.

[0133] When the power backoff amount in group y is denoted as P y and the MCS in group y is denoted as M y , in some implementations, group y can be configured with a smaller backoff amount (P y ≤ P x ) and a lower MCS (M y ≤ M x ) than group x to explore a larger range of nonlinearity of the power amplifier of the terminal device.

[0134] When the power backoff amount in group z is denoted as P z and the MCS in group z is denoted as M z , in some implementations, group z can be configured with the remaining data symbols scheduled to the terminal device, and the power backoff amount is selected as P z ≤ Py MCS selection is M z M y to further expand the nonlinear exploration range; optionally, the power backoff amount can be selected as P z P y and M z M y to transmit data.

[0135] An example of the content of the group x, the group y and the group z is shown in Table 3.

[0136] Table 3

[0137] Another example of the content of the group x, the group y and the group z is shown in Table 4.

[0138] Table 4

[0139] In some implementations, the sending parameters contain two groups, and the first signal corresponds to the two groups of data. In this implementation, two of the groups x, y and z can be optionally combined. As an example, the group x is combined with the group z to reduce the overhead of training data acquisition.

[0140] When the sending parameters contain two groups, denoted as the group x and the group y, an example of the sending parameters of the two groups is shown in Table 5.

[0141] Table 5

[0142] In some implementations, the network device can indicate the group number to inform the terminal device of the configured multiple groups of sending parameters to save the signaling overhead.

[0143] In some implementations, one or more configuration modes are predefined, each configuration mode containing several groups of parameters and the values of each group of parameters being predefined, and the network device only needs to indicate the number or index of each configuration mode to the terminal device, which can save the signaling overhead.

[0144] As an example, Table 4 or Table 5 can be used as a configuration mode, respectively.

[0145] It can be understood that in each group of parameters in each mode, part of the parameters can be predefined as a fixed mode, and this part of the parameters is indicated by the index of the fixed mode, and the other part of the parameters is indicated by another information to indicate the specific value.

[0146] In this embodiment, the terminal device sends the first signal based on each group of parameters in the multiple groups of parameters, and correspondingly, the network device receives multiple first signals, which correspond one-to-one to the multiple groups of parameters, and each first signal is a signal sent by the corresponding group of parameters.

[0147] In the embodiment, the above content can be executed only in a scenario where nonlinear estimation needs to be performed and a nonlinear estimation result is obtained. After the nonlinear estimation is completed, the normal mode can be switched to for data transmission. The normal mode herein can be understood as not transmitting the first signal according to the foregoing configuration.

[0148] In some implementations of the embodiment, the NERS can occupy one or more symbols, and each symbol can be referred to as a NERS symbol. Each NERS symbol can include NERS of multiple antenna ports, and the NERS of the multiple ports can be transmitted in an orthogonal multiplexing manner, such as frequency division, code division, and the like.

[0149] In some implementations, the NERS symbol is placed after the first DMRS symbol, and the positions of the multiple NERS symbols can be adjacent or nonadjacent.

[0150] In some implementations, in the frequency domain resource, the NERS and the DMRS map to the same bandwidth and are not multiplexed with other data.

[0151] FIG. 6 is an example diagram in which the NERS occupies one symbol.

[0152] When both the first signal and the second signal are NERS, in some implementations, the NERS can occupy multiple symbols. FIG. 7 is an example diagram in which the NERS occupies two symbols.

[0153] When multiple NERS symbols are configured, in some implementations, a front NERS (F-NERS) symbol is used for channel estimation and can use a ZC sequence or a PN sequence; a back NERS (B-NERS) symbol is used for detecting nonlinearity and can use a sequence with high PAPR, such as a PN sequence or a DPMA sequence. The front herein can be understood as in time sequence first, and the back can be understood as in time sequence last.

[0154] When the first signal and the second signal are NERS and the MERS occupies multiple symbols, in some implementations, the first transmission parameter indicates not only the first transmission parameter of the first signal but also the transmission parameter of the second signal.

[0155] An example in which the first transmission parameter indicates both the transmission parameter of the first signal and the transmission parameter of the second signal is shown in Table 6. The content of the second row includes the transmission parameter of the first signal, and the content of the first row includes the transmission parameter of the second signal.

[0156] Table 6

[0157] As an example, N x The value range of N y is 0 to 4.

[0158] Some examples of the transmission parameters of the first signal and the transmission parameters of the second signal when the first signal occupies the NERS symbol and the second signal occupies the NERS symbol are shown in any of Table 7 to Table 9.

[0159] Table 7

[0160] Table 8

[0161] Table 9

[0162] In some implementations, in the scenario of any precoding, after obtaining the nonlinear estimation, the B-NERS does not need to be configured continuously; however, the F-NERS still needs to be configured because it is needed to complete the channel estimation and equalize the data on each antenna after the nonlinear distortion.

[0163] In some implementations, one combination of the transmission parameters of the first signal and the transmission parameters of the second signal can be recorded as a mode, and a number or an index of the mode is configured, and the network device informs the terminal device of the transmission parameters of the first signal and the transmission parameters of the second signal by indicating the number or the index, that is, the number or the index is contained in the first information. As an example, Table 7 to Table 9 can be a mode respectively.

[0164] In some embodiments of the present application, the terminal device can not perform precoding processing when transmitting the first signal, so that the nonlinear estimation and compensation can be performed at the data receiving end in the scenario of any precoding of the terminal device.

[0165] FIG. 8 is a transmission flow of a signal not undergoing precoding for nonlinear estimation according to an embodiment of the present application. In some embodiments of the present application, in the scenario of the same signal being used for channel estimation and nonlinear estimation, the signal can not undergo precoding when being transmitted, so that the nonlinear estimation and compensation can be performed at the data receiving end in the scenario of any precoding of the terminal device. Meanwhile, the signal undergoes resource mapping, waveform modulation processing, and power amplification processing by a power amplifier when being transmitted.

[0166] For example, in the scenario of the signal on the NERS occupying one symbol being used for channel estimation and nonlinear estimation, the NERS can simultaneously undertake the functions of channel estimation and nonlinear estimation. In this case, the sequence of the NERS can be a PN sequence.

[0167] In some implementations, the network device configuring the transmission parameters of the first signal, the network device receiving the first signal, and the network device performing nonlinear estimation can not be the same network device.

[0168] It can be understood that FIG. 4 to FIG. 8 mainly introduce examples in which the terminal device sends uplink signals for uplink estimation, but the principles in any of the above examples can also be applicable to scenarios in which the network device sends downlink signals for downlink estimation. For example, the network device can perform operations similar to those of the terminal device in any of the above method embodiments, i.e., the network device sends a first signal for nonlinear estimation and sends a second signal for channel estimation.

[0169] FIG. 9 is a structural schematic diagram of a communication apparatus according to an embodiment of the present application. As shown in FIG. 9, the communication apparatus 900 can include a processing module 910 and a transceiver module 920.

[0170] As a first example, the apparatus 900 can be used to implement the communication method implemented by the network device in the embodiment shown in FIG. 4. For example, the processing module 910 is configured to implement the processing-related steps performed by the network device in any of the embodiments shown in FIG. 4, and the transceiver module 920 is configured to implement the sending and / or receiving steps and the like performed by the network device in any of the embodiments shown in FIG. 4.

[0171] As a second example, the apparatus 900 can be used to implement the communication method implemented by the terminal device in the embodiment shown in FIG. 4. For example, the processing module 910 is configured to implement the processing-related steps performed by the terminal device in any of the embodiments shown in FIG. 4, and the transceiver module 920 is configured to implement the sending and / or receiving steps and the like performed by the terminal device in any of the embodiments shown in FIG. 4.

[0172] FIG. 10 is a structural schematic diagram of a communication apparatus according to another embodiment of the present application. As shown in FIG. 10, the communication apparatus 1000 includes a processor 1010 and a communication circuit 1020. The processor 1010 and the communication circuit 1020 are coupled to each other. It can be understood that the communication circuit 1020 can be a transceiver or an input / output interface. Optionally, the apparatus 1000 can further include a memory 1030 configured to store instructions executed by the processor 1010 or store input data required for the processor 1010 to execute instructions or store data generated after the processor 1010 executes instructions. It can be understood that the memory 1030 can be located outside the processor 1010, or located inside the processor 1010.

[0173] As an example, the processor 1010 is configured to implement the functions of the processing module 910, and the communication circuit 1020 is configured to implement the functions of the transceiver module 920.

[0174] The communication apparatus 1000 can be a network device, or a chip applied to a network device.

[0175] It can be understood that the communication apparatus 1000 is a network device, and the communication circuit 1020 can be a transceiver. The communication apparatus 1500 is a chip, and the communication circuit 1020 can be an input / output interface.

[0176] The communication apparatus 1000 can be a terminal device, or a chip applied in a terminal device.

[0177] It can be understood that the communication apparatus 1000 is a network device, and the communication circuit 1020 can be a transceiver. The communication apparatus 1000 is a chip, and the communication circuit 1020 can be an input / output interface.

[0178] When the communication apparatus is a chip applied in a terminal, the terminal chip implements the functions of the terminal in the method embodiments. The terminal chip receives information from a network device, which can be understood as that the information is received by other modules (such as a radio frequency module or an antenna) in the terminal first, and then transmitted to the terminal chip by the modules. The terminal chip transmits information to the network device, which can be understood as that the information is transmitted to other modules (such as a radio frequency module or an antenna) in the terminal first, and then transmitted to the network device by the modules.

[0179] When the communication apparatus is a chip applied in a network device, the network device chip implements the functions of the network device in the method embodiments. The network device chip receives information from a terminal, which can be understood as that the information is received by other modules (such as a radio frequency module or an antenna) in the network device first, and then transmitted to the network device chip by the modules. The network device chip transmits information to the terminal, which can be understood as that the information is transmitted to other modules (such as a radio frequency module or an antenna) in the network device first, and then transmitted to the terminal by the modules.

[0180] In this application, entity A transmitting information to entity B can be that A directly transmits to B, or A indirectly transmits to B through other entities. Similarly, entity B receiving information from entity A can be that entity B directly receives the information transmitted by entity A, or entity B indirectly receives the information transmitted by entity A through other entities. Here, entity A and B can be RAN nodes or terminals, or modules inside RAN nodes or terminals. The transmission and reception of information can be the information interaction between RAN nodes and terminals, for example, the information interaction between a network device and a terminal; the transmission and reception of information can also be the information interaction between two RAN nodes, for example, the information interaction between a CU and a DU; the transmission and reception of information can also be the information interaction between different modules inside one apparatus, for example, the information interaction between a terminal chip and other modules in the terminal, or the information interaction between a network device chip and other modules in the network device.

[0181] Some embodiments of the present application further provide a computer program product, which, when executed on a processor, can implement the method implemented by the terminal device in any of the above embodiments.

[0182] Some embodiments of the present application further provide a computer program product, which, when executed on a processor, can implement the method implemented by the network device in any of the above embodiments.

[0183] Some embodiments of the present application further provide a computer readable storage medium, which contains computer instructions, which, when executed on a processor, can implement the method implemented by the terminal device in any of the above embodiments.

[0184] Some embodiments of the present application further provide a computer readable storage medium, which contains computer instructions, which, when executed on a processor, can implement the method implemented by the network device in any of the above embodiments.

[0185] Some embodiments of the present application further provide a communication system, which can implement the method implemented by the terminal device and the network device in any of the above method embodiments.

[0186] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0187] The steps of a method, process, or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM, flash memory, ROM, EEPROM, ERASABLE / PROGRAMMABLE ROM, EEPROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. Alternatively, the processor and the storage medium can exist as discrete components in a computing device or terminal. As software reads information from the storage medium, the instructions are loaded into memory and executed by the processor.

[0188] In the embodiments described above, the functions can be implemented in hardware, software, firmware or any combination thereof. If implemented in software, the functions can be stored or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu-Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

Claims

1. A communication method characterized by comprising: The method comprises: generating first information, the first information being used to indicate first transmission parameters of a first signal, the first signal being used for non-linear estimation, time domain resources of the first signal not overlapping with time domain resources of a second signal, the second signal being used for channel estimation; transmitting the first information.

2. The method of claim 1, wherein, The first transmission parameters comprise at least one of the following parameters: time domain position, frequency position, power backoff amount, or, symbol number.

3. The method of claim 2, wherein, The first transmission parameters comprise a first power backoff amount, and the method further comprises: transmitting second information, the second information being used to indicate second transmission parameters of the first signal, the second transmission parameters comprising a second power backoff amount, the first power backoff amount and the second power backoff amount being different.

4. The method according to any one of claims 1 to 3, characterized in that, The first information comprises an index of the first transmission parameters.

5. The method according to any one of claims 1 to 4, characterized in that, The first signal is a data signal, and the at least one parameter further comprises modulation and coding strategy.

6. The method according to any one of claims 1 to 4, characterized in that, The first signal is a reference signal, and the at least one parameter further comprises sequence type and / or sequence generation related parameters.

7. The method according to any one of claims 1 to 6, characterized in that, The first signal and the second signal are both reference signals, and sequence generation manners of the first signal and the second signal are different.

8. The method according to any one of claims 1 to 6, characterized in that, The first signal and the second signal are both reference signals, and sequence generation manners of the first signal and the second signal are the same.

9. A communication method characterized by comprising: The method comprises: receiving first information, the first information being used to indicate first transmission parameters of a first signal, the first signal being used for non-linear estimation, time domain resources of the first signal not overlapping with time domain resources of a second signal, the second signal being used for channel estimation; transmitting the first signal based on the first information.

10. The method of claim 9, wherein, The first transmission parameters comprise at least one of the following parameters: time domain position, frequency position, power backoff amount, or, symbol number.

11. The method of claim 10, wherein, The first transmission parameters comprise a first power backoff amount, and the method further comprises: receiving second information, the second information being used to indicate second transmission parameters of the first signal, the second transmission parameters comprising a second power backoff amount, the first power backoff amount and the second power backoff amount being different; transmitting the first signal according to the second information.

12. The method according to any one of claims 9 to 11, characterized in that, The first signal is not precoded.

13. A communications device, characterized by The apparatus comprises a processor configured to execute computer program instructions to implement the method of any one of claims 1 to 8, or to implement the method of any one of claims 9 to 12.

14. A computer-readable storage medium, characterized in that, The apparatus comprises instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 8, or to perform the method of any one of claims 9 to 12.

15. A computer program product, characterised in that, The apparatus comprises computer program code or instructions which, when executed on a computer, cause the method of any one of claims 1 to 8 to be implemented, or cause the method of any one of claims 9 to 12 to be implemented.

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