CN113767603A

CN113767603A - Communication method and communication device

Info

Publication number: CN113767603A
Application number: CN201980095801.1A
Authority: CN
Inventors: 王建国; 周永行
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2021-12-07
Anticipated expiration: 2039-04-30
Also published as: CN113767603B; WO2020220344A1

Abstract

A communication method and a communication device are provided, wherein the method specifically comprises the following steps: the method comprises the steps that a first device determines time domain resources occupied by a first signal and a data signal, wherein the first signal comprises a reference signal and an interference elimination signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resources, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resources, and the interference elimination signal is used for eliminating interference of the data signal on the reference signal; the method comprises the steps that first equipment determines a first signal and a data signal which are borne on time domain resources; the first device transmits a first signal and a data signal on a time domain resource. Therefore, the reference signals at the head end and the tail end of the time domain resource are continuous, and the crosstalk between the data signal and the reference signal caused by the nonlinear characteristic of the PA can be eliminated.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and a communication apparatus.

Background

A Power Amplifier (PA) is an indispensable component in a communication system, and since characteristics of various active devices constituting the PA are nonlinear, the PA always exhibits a certain degree of nonlinearity. Thus, while the PA amplifies the signal, some degree of non-linear distortion, such as phase distortion and amplitude distortion, is introduced into the amplified signal.

A Reference Signal (RS) is a signal whose content is known, and is sometimes referred to as a pilot signal. The content of the reference signal, i.e. the reference signal sequence carried by the reference signal, is generally predetermined by the communication system. Thus, prior to receiving the reference signal, the receiving device may know the content of the reference signal based on the system configuration. Thereafter, the receiving device derives a reference signal sequence from the received reference signal and compares it with an expected reference signal sequence, thereby estimating the characteristics of the channel. The channel characteristics estimated by the receiving device may be used for demodulation of the data signal. A data signal is a signal that carries data information. Unlike the reference signal, the content of the data signal, i.e. the data information, is unknown to the receiving device. However, with the estimated characteristics of the channel, the receiving device can still correctly demodulate the data information from the data signal transmitted by the channel, thereby achieving the goal of communication.

Under the existing RS pattern (pattern), the RS and the data information are arranged in a frequency domain multiplexing manner, as shown in fig. 1, a comb-shaped arrangement structure is presented in the frequency domain, that is, the RS is carried on every fixed number of subcarriers in the frequency domain. If an RS on a Resource Element (RE) is extracted, and 0 is added to other REs, a frequency domain signal corresponding to the extracted RS is converted into a time domain signal through Inverse Fast Fourier Transform (IFFT), and the time domain signal corresponding to the RS is fed to a PA.

In order to eliminate the nonlinear effect of the PA, a digital pre-distortion (DPD) system is used in the transmitter, as shown in fig. 2, wherein a DPD module is placed in front of the PA, and functions to generate a nonlinear characteristic complementary to the nonlinear characteristic of the PA and introduce it into the signal to be transmitted to form a predistorted signal, which is sequentially subjected to digital-to-analog conversion (DAC), up-converted to a radio frequency signal, and fed to the PA. The output signal of the PA is down-converted to a baseband signal and fed back to the DPD module through analog-to-digital conversion (ADC) as the auxiliary decision information of the DPD module to form a closed loop. Therefore, the amplitude and the phase of the transmission signal can be distorted in advance before the transmission signal is sent into the PA, so as to partially compensate the nonlinear distortion of the subsequent PA, and the DPD module and the PA are integrally seen as a PA with better linearity. However, this scheme can only partially eliminate the nonlinear effect of the PA, and the performance parameters of the DPD module are statically configured for the specific nonlinear characteristic of the PA, that is, the DPD module can only be used to eliminate the specific nonlinear characteristic of the PA after configuration, but the nonlinear characteristic of the PA dynamically changes due to the influence of device temperature, and if the nonlinear characteristic of the PA changes, the DPD cannot eliminate the nonlinear effect of the PA after the change. In addition, some terminals and small base stations do not have a DPD module, and thus, a Digital Predistortion (DPD) module cannot be used to eliminate the influence of the nonlinear characteristic of the PA on the RS.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for eliminating the influence of the nonlinear characteristic of a PA on an RS.

In a first aspect, an embodiment of the present application provides a communication method, which may be performed by a first device, and includes: the method comprises the steps that a first device determines time domain resources occupied by a first signal and a data signal, wherein the first signal comprises a reference signal and an interference elimination signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resources, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resources, and the interference elimination signal is used for eliminating interference of the data signal on the reference signal; the method comprises the steps that first equipment determines a first signal and a data signal which are borne on time domain resources; the first device transmits a first signal and a data signal on a time domain resource.

Based on the scheme, because a first reference signal in the reference signals occupies continuous resources on a first end of a time domain resource, a second reference signal in the reference signals occupies continuous resources on a second end of the time domain resource, and the interference elimination signal can be used for eliminating the interference of data signals to the reference signals, so that the reference signals on the head end and the tail end of the time domain resource are continuous, unlike the prior art, the data signals and the reference signals are inserted on the frequency domain resource and then converted to the time domain resource, so that the data signals exist on the whole time domain resource after the conversion, and the problem that the reference signals cannot be estimated due to the interference of unknown data signals to the reference signals is caused, in the application, the continuous resources on the head end and the tail end of the time domain resource are designed to be the reference signals, the reference signals are known, and even if the reference signals between different sampling points on the first end or the second end interfere with each other, the reference signal can also be estimated, and thus, the crosstalk between the data signal and the reference signal due to the nonlinear characteristic of the PA can be eliminated.

Further, there are various implementations of the first device determining the first signal and the data signal carried on the time domain resource, which may specifically include, but are not limited to, the following two implementations:

in a first implementation manner, the first device may further determine a position occupied by the data signal on the frequency domain resource, modulate the data signal onto the frequency domain resource according to the position occupied by the data signal on the frequency domain resource, determine the data signal carried on the time domain resource according to the data signal modulated onto the frequency domain resource, then determine the first signal carried on the time domain resource according to the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource, and combine the first signal carried on the time domain resource and the data signal carried on the time domain resource.

In this way, a way of combining the first signal and the data signal on the time domain resources is provided.

In a second implementation manner, after the first device determines the first signal carried on the time domain resource according to the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource, the first device may also determine the first signal carried on the frequency domain resource according to the first signal carried on the time domain resource; then, the first device determines the first signal and the data signal carried on the time domain resource according to the data signal carried on the modulated frequency domain resource and the first signal carried on the frequency domain resource.

In this way, a way of combining the first signal and the data signal on frequency domain resources is provided.

It should be noted that the first signal on the frequency domain resource and the first signal on the time domain resource related to the present application may be obtained through fourier transform or inverse fourier transform, and the difference between the two is that the expression form of the first signal is different, that is, the sequence value corresponding to the first signal on the frequency domain resource is the expression form on the frequency domain, and the sequence value corresponding to the first signal on the time domain resource is the expression form on the time domain, so that the sequence value corresponding to the first signal on the frequency domain resource is different from the sequence value corresponding to the first signal on the time domain resource and may be transformed with each other. Based on the same reason, the first data signal on the frequency domain resource and the first data signal on the time domain resource are also only different in representation form, and are also applicable to other signals on the frequency domain resource and other signals on the time domain resource, which are not described in detail later.

In one possible design, the frequency domain resources include N subcarriers, the first signal occupies a tth subcarrier of the N subcarriers, t ∈ {0,1, …, N-1} and t mod M ═ Δ, the data signal occupies a kth subcarrier of the N subcarriers, k ∈ {0,1, …, N-1} and k mod M ≠ Δ, Δ ∈ {0,1, …, M-1}, N is an integer greater than 1, and M is a positive integer less than N.

By this design, an arrangement (or sequence structure) of the first signal and the data signal on the frequency domain resource is provided, wherein Δ may determine to empty one subcarrier from the first subcarrier for inserting the first signal, M may determine to empty one subcarrier every several subcarriers for inserting the first signal, and the other non-empty subcarriers are used for inserting the first data signal.

In one possible design, continuous resources at a first end of the time domain resources carry a second signal and first data in the data signal, the second signal includes a first reference signal and a first interference cancellation signal in the interference cancellation signal, and the first interference cancellation signal cancels the first data; and continuous resources at the second end of the time domain resources carry a third signal and second data in the data signal, the third signal comprises a second reference signal and a second interference cancellation signal in the interference cancellation signals, and the second interference cancellation signal cancels the second data.

Through the design, the first end of the time domain resource bears a first reference signal, a first interference elimination signal and first data, wherein the first interference elimination signal is offset with the first data, so that only the first reference signal is on the first end of the time domain resource, the second end bears a second reference signal, a second interference elimination signal and second data, wherein the second interference elimination signal is offset with the second data, so that only the second reference signal is on the second end of the time domain resource, and therefore, the interference of the data signal to the reference signal is not existed on the two ends of the time domain resource.

In one possible design, the middle continuous resource of the time domain resource carries a fourth signal, where the fourth signal includes third data in the data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal, and the middle continuous resource is a resource other than the continuous resource at the first end and the continuous resource at the second end in the time domain resource.

In one possible design, the time domain resources are divided into M segments of resources, and a first signal carried in the M segments of resources satisfies the following relationship: for any M e {1,2, …, M-2, M-1}, the condition is satisfied

Wi is a signal carried by the ith resource in the time domain resources, i is an integer from 0 to N-1, and M and N are integers greater than 1. Wherein exp (x) represents e^x。

By means of the design, the content of the first signal carried on the intermediate continuous resource of the time domain resource can be determined through the known first reference signal on the first end and the known second reference signal on the second end of the time domain resource and the relation. So that the first signal on the time domain resource is transferred to the frequency domain resource, the first signal is inserted in the comb structure of the frequency domain resource, wherein the first signal occupies the t-th subcarrier of the N subcarriers, t ∈ {0,1, …, N-1} and t mod M ═ Δ.

In one possible design, before transmitting the first signal and the data signal on the time domain resource, the first device may further add a cyclic prefix before the first end of the time domain resource, where the cyclic prefix is the same as the second reference signal; the first device may transmit a cyclic prefix, a first signal, and a data signal on time domain resources.

By the design, the cyclic prefix is added before the first end of the time domain resource, and the effects of inter-carrier interference and multipath delay can be resisted.

In a second aspect, an embodiment of the present application provides a communication method, which may be performed by a second device, including: the second device receives a first signal and a first data signal sent by the first device on a time domain resource, the first signal comprises a reference signal and an interference elimination signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resource, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resource, and the interference elimination signal is used for eliminating interference of the first data signal on the reference signal; the second device may demodulate to obtain the estimated value of the first data signal according to the first reference signal, the second reference signal, and the received fourth reference signal corresponding to the first reference signal, the fifth reference signal corresponding to the second reference signal, and the fifth signal corresponding to the fourth signal.

Based on this scheme, after the first device transmits the first signal and the first data signal, since the signal may be distorted by the nonlinear characteristic of the PA when passing through the PA, the signal received by the second device may not be the first signal and the first data signal, for example, a fourth reference signal corresponding to the first reference signal is received on a continuous resource on a first end of a time domain resource, a fifth reference signal corresponding to the second reference signal is received on a continuous resource on a second end, and the first reference signal and the second reference signal are known, so that the relationship between the received signal and the transmitted signal can be obtained according to the received fourth reference signal and the fifth reference signal, and the first reference signal and the second reference signal, and the received fifth signal can obtain the estimated value of the first data signal. Therefore, the reference signals sent by the sending end at the head end and the tail end of the time domain resource occupy continuous resources, unlike the prior art, the data signal and the reference signal are inserted on the frequency domain resource, the data signal and the reference signal on the frequency domain resource are converted into the data signal and the reference signal on the time domain resource, and then are amplified and sent by the PA, and when the data signal and the reference signal on the frequency domain resource are converted to the time domain, the data signal exists on the whole time domain resource, so that the nonlinear characteristic of the PA can cause the interference of the data signal on the reference signal RS, the problem that the reference signal cannot be estimated due to the interference of the unknown data signal on the reference signal exists, the embodiment of the application only has the reference signal at the first end of the time domain resource, and only has the reference signal at the second end, so that the interference of the data on the reference signal does not exist, and the reference signal is known, therefore, even if the reference signals between different sampling points on the first end or the second end interfere with each other, the reference signals can be estimated, and the receiving end can demodulate to obtain an estimated value which is closer to the first device for sending the first data signal.

In one possible design, continuous resources at a first end of a time domain resource carry a second signal and first data in a first data signal, the second signal includes a first reference signal and a first interference cancellation signal in an interference cancellation signal, and the first interference cancellation signal cancels the first data; and continuous resources at the second end of the time domain resources carry a third signal and second data in the first data signal, the third signal comprises a second reference signal and a second interference cancellation signal in the interference cancellation signals, and the second interference cancellation signal cancels the second data.

In one possible design, a middle continuous resource of the time domain resources carries a fourth signal, where the fourth signal includes third data in the first data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal, and the middle continuous resource is a resource except a continuous resource at the first end and a continuous resource at the second end in the time domain resources.

W _iAnd taking an integer from 0 to N-1 for the signal carried by the ith resource in the time domain resource, wherein M and N are integers more than 1.

In one possible design, the second device may determine the estimation model based on the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal; the second equipment determines a sixth signal corresponding to the fifth signal according to the estimation model and the fifth signal received from the intermediate continuous resource of the time domain resource; the sixth signal is an estimated value of a fourth signal which is sent by the first device and is carried on the intermediate continuous resource of the time domain resource; the fourth signal comprises third data in the first data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal; the second device determines a seventh signal according to the determined sixth signal, the first reference signal and the second reference signal, wherein the seventh signal is an estimated value of the first signal and the first data signal which are sent by the first device and carried on the time domain resource; the second device processes the seventh signal carried on the frequency domain resource according to the seventh signal carried on the time domain resource; and the second equipment demodulates the seventh signal carried on the frequency domain resource to obtain a third data signal, wherein the third data signal is an estimated value of the first data signal.

By the design, the second device can obtain an estimation model through the known first reference signal and the fourth reference signal and the known second reference signal and the fifth reference signal, then, according to the estimation model, an estimated value of a fourth signal transmitted by the transmitting end on an intermediate continuous resource of the time domain resources can be estimated according to a fifth signal received on the intermediate continuous resource of the time domain resources, an estimate of the first signal and the first data signal that may be carried on the time domain resources may then be determined, the seventh signal carried on the time domain resource may then be processed into a seventh signal carried on the frequency domain resource, since the frequency domain structure is arranged in a comb shape, and the first signal and the first data signal are arranged at intervals on the frequency domain resource, so that an estimate can be obtained from the frequency domain structure that is closer to the first data signal transmitted by the first device.

In one possible design, the second device trains the neural network model according to the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal, so as to obtain the estimation model. Alternatively, the neural network may be an echo state network ESN.

In a third aspect, a communications apparatus is provided. The apparatus provided by the present application has the functionality to implement the behaviour of the first device or the second device in the above-described method aspects, comprising means (means) for performing the steps or functions described in the above-described method aspects. The steps or functions may be implemented by software, or by hardware (e.g., a circuit), or by a combination of hardware and software.

In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the network device in the above method. For example, a first signal and a first data signal carried on a time domain resource occur. The communication unit is used for supporting the device to communicate with other equipment and realizing receiving and/or sending functions. For example, a reference signal is transmitted.

Optionally, the apparatus may also include one or more memories for coupling with the processor that hold the necessary program instructions and/or data for the apparatus. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

The communication unit may be a transceiver, or a transceiving circuit. Optionally, the transceiver may also be an input/output circuit or interface.

The apparatus may be a base station, a gNB, a TRP, or the like, and the communication unit may be a transceiver, or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or an interface of the communication chip.

In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transceive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, so that the apparatus performs the method performed by the first device in any one of the possible implementations of the first aspect or the first aspect, or performs the method performed by the second device in any one of the possible implementations of the second aspect or the second aspect.

In a fourth aspect, a system is provided, which comprises the first device of the first aspect and the second device of the second aspect.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program comprising instructions for carrying out the method of the first aspect or any one of the possible implementations of the first aspect, or comprising instructions for carrying out the method of the second aspect or any one of the possible implementations of the second aspect.

In a sixth aspect, there is provided a computer program product comprising: computer program code for causing a computer to perform the method of any of the possible implementations of the first aspect or the first aspect described above, or to perform the method of any of the possible implementations of the second aspect or the second aspect, when said computer program code is run on a computer.

Drawings

Fig. 1 is a schematic diagram of a reference signal RS pattern provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a digital predistortion system according to an embodiment of the present application;

fig. 3 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 4 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 5 is a schematic diagram of a communication method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an occupied position of a reference signal in an OFDM symbol according to an embodiment of the present application;

fig. 7a is a schematic diagram of a frequency domain structure according to an embodiment of the present application;

fig. 7b is a schematic diagram of another frequency domain structure provided in the embodiment of the present application;

FIG. 8a is a diagram illustrating a known sequence value of a first time domain signal according to an embodiment of the present application;

fig. 8b is a diagram illustrating a known sequence value of a second time domain signal according to an embodiment of the present application;

fig. 9 is a schematic diagram of a time domain signal structure provided in an embodiment of the present application;

fig. 10 is a system diagram of a MIMO-OFDM receiver of an ESN network according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the present application may be applied to, but not limited to, a 5G system, such as an NR system, an LTE system, a long term evolution-advanced (LTE-a) system, an enhanced long term evolution-advanced (LTE) communication system, and the like, and may also be extended to a related cellular system, such as wireless fidelity (WiFi), worldwide interoperability for microwave access (wimax), and 3 GPP. Specifically, as shown in fig. 3, the communication system architecture applied in the embodiment of the present application may include at least two network devices, which are a network device 1 and a network device 2, respectively, where the network device 1 serves the terminal device 1, and the network device 2 serves the terminal device 2. Network device 1 and network device 2 may be network devices that are geographically remote. It should be noted that, in the embodiment of the present application, the number of terminal devices and network devices in the communication system shown in fig. 3 is not limited.

Hereinafter, some terms in the present application are explained to facilitate understanding by those skilled in the art.

1) A network device is a device for accessing a terminal to a wireless network in a communication system. The network device is a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). In the following description, a base station will be referred to as an example. Currently, some examples of network devices are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In addition, in a network structure, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure separates the protocol layers of the eNB in a Long Term Evolution (LTE) system, the functions of part of the protocol layers are controlled in the CU in a centralized way, the functions of the rest part or all of the protocol layers are distributed in the DU, and the CU controls the DU in a centralized way.

2) A terminal, also referred to as a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.

3) An orthogonal frequency division system:

an Orthogonal Frequency Division Multiplexing (OFDM) communication system belongs to a multi-carrier system. In the frequency domain, one OFDM symbol occupies a plurality of orthogonal subcarriers (subcarriers). In the time domain, one OFDM symbol includes a plurality of sampling points (samples), also called sampling points; the signal carried by one OFDM symbol is a signal obtained by superimposing N orthogonal subcarrier signals. An OFDM symbol is typically generated by first carrying the signal it is to transmit in the frequency domain and then converting it to the time domain by an inverse fourier transform. Optionally, the OFDM symbol converted into the time domain may further add a Cyclic Prefix (CP), that is, several sampling points at the end are added to the head end as the CP to form an OFDM symbol including the CP, as shown in fig. 4. One square in the time domain sequence in fig. 4 represents one or more subcarriers and one square in the time domain sequence represents one or more samples.

In the prior art, a sending device uses an existing RS pattern (pattern), wherein RSs and data information are arranged in a frequency domain multiplexing manner, and then the RS and data information on a frequency domain resource are converted into RS and data information on a time domain resource, and then are amplified by a PA and then are sent, on one hand, a data signal and a reference signal in the existing RS pattern are inserted on the frequency domain resource, the data signal and the reference signal on the frequency domain resource are converted into a data signal and a reference signal on the time domain resource, and then are amplified and sent by the PA, and when the data signal and the reference signal on the frequency domain resource are transferred to the time domain, the data signal exists on the whole time domain resource, so that the nonlinear characteristic of the PA causes interference of the data signal on the reference signal RS, but the data signal is unknown, so that the interference on the reference signal cannot be estimated, and therefore the influence of the nonlinear characteristic of the PA on the RS cannot be eliminated, on the other hand, after the receiving apparatus receives the reference signal, channel estimation may be performed based on the reference signal in order to estimate data information originally transmitted by the transmitting apparatus, and it is difficult for the receiving apparatus to accurately estimate the channel due to distortion of the received reference signal.

Based on this, embodiments of the present application provide a communication method and apparatus, so as to solve the problem in the prior art that the nonlinear characteristic of a PA affects an RS. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

Hereinafter, a first device is taken as a sending device, a second device is taken as a receiving device for explanation, and if the first device is a terminal device, the second device is a network device; and if the first equipment is network equipment, the second equipment is terminal equipment. It should be understood that the second device may also act as the sending device, in which case the first device acts as the receiving device. In the description of the embodiments of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order. And will not be described in detail later.

In the following, a time domain resource is taken as an OFDM symbol for example, and a frequency domain resource is taken as an OFDM symbol for occupying N subcarriers, where N is a positive integer.

In order to eliminate the influence of the non-linear characteristic of the PA on the RS, in the embodiment of the present application, a structure is designed in which data is comb-arranged on a frequency domain resource and reference signals are arranged on a time domain resource without changing a comb arrangement mode of the data on the frequency domain resource, wherein an interference cancellation signal is added to a subcarrier used for carrying the reference signals, and the interference of the data signals on the reference signals is eliminated by using the interference cancellation signal, so that the head and the tail ends of one OFDM symbol are continuous reference signals, and thus the transmission signals carried on the time domain resource are not influenced by the non-linear characteristic of the PA.

Referring to fig. 5, a flowchart of a communication method according to an embodiment of the present application is schematically shown. The method may comprise the steps of:

in step 501, a first device determines a time domain resource occupied by a first signal and a first data signal.

The first signal includes a reference signal (which may be denoted as RS) and an interference cancellation signal (which may be denoted as IC), the reference signal includes a first reference signal and a second reference signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resources, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resources, and the interference cancellation signal is used for canceling interference of the first data signal on the reference signal. Optionally, the reference signal further includes a third reference signal.

In a possible implementation manner, continuous resources on the first end of the time domain resource carry a second signal and first data in the first data signal, where the second signal includes a first reference signal and a first interference cancellation signal in the interference cancellation signal, that is, the first end of the time domain resource includes the first reference signal, the first interference cancellation signal, and the first data, where the first interference cancellation signal cancels the first data, and therefore, only the first reference signal remains on the continuous resources on the first end of the time domain resource. Based on the same concept, the continuous resource at the second end of the time domain resource carries a third signal and second data in the first data signal, where the third signal includes a second reference signal and a second interference cancellation signal in the interference cancellation signal, that is, the second end of the time domain resource includes the second reference signal, the second interference cancellation signal, and the second data, where the second interference cancellation signal cancels the second data, so that only the second reference signal remains on the continuous resource at the second end of the time domain resource. Therefore, only the reference signal exists on the continuous resource of the first end and the continuous resource of the second end of the time domain resource, unlike the prior art, the data signal and the reference signal are inserted on the frequency domain resource, the data signal and the reference signal on the frequency domain resource are converted into the data signal and the reference signal on the time domain resource, and then the data signal and the reference signal are amplified and transmitted through the PA, and when the data signal and the reference signal on the frequency domain resource are converted to the time domain, the data signal exists on the whole time domain resource, so that the nonlinear characteristic of the PA can cause the interference of the data signal to the reference signal RS, and the problem that the reference signal cannot be estimated due to the interference of the unknown data signal to the reference signal exists, therefore, even if the reference signals between different sampling points on the first end or the second end interfere with each other, the reference signals can be estimated, and therefore, the crosstalk between the data signals and the reference signals caused by the nonlinear characteristic of the PA can be eliminated.

Moreover, when any two OFDM symbols are connected, the second end of one OFDM symbol is connected with the first end of the other OFDM symbol, so that the continuous position where the two OFDM symbols are connected is also the reference signal, and thus the multi-path interference between the data and the reference signal can be weakened.

In one example, an OFDM symbol includes N sequence values, u ═ u (u)₀,u ₁,u ₂,…,u _N-3,u _N-2,u _N-1) Wherein the first reference signal occupies the OFDM symbol with a header length of

Can be expressed as

The second reference signal occupies the tail length N of the OFDM symbol_cpCan be expressed as

Wherein N is_cpFor the length of the Cyclic Prefix (CP), M is a positive integer, and defines the reference signal overhead, i.e. the reference signal overhead occupies OFDM resources

The example is given for N equal to 15, M equal to 3 and Ncp equal to 3.

Referring to fig. 6, a structural diagram of the occupied positions of the reference signals in the OFDM symbols is shown. As shown in fig. 6, the OFDM symbol includes 15 sequence values,

equal to 2, i.e. OFDM symbol (u)₀,u ₁,……,u ₁₂,u ₁₃,u ₁₄) 2 consecutive time domain positions (u) of the header₀,u ₁) Is a first reference signal, N_cpEqual to 3, i.e. OFDM symbol (u)₀,u ₁,……,u ₁₂,u ₁₃,u ₁₄) 3 consecutive time domain positions (u) of the tail₁₂,u ₁₃,u ₁₄) Is the second reference signal.

Based on any one of the above possible implementation manners, the frequency domain resource includes N subcarriers, where N is an integer greater than 1. The arrangement of the first signal and the first data signal on the frequency domain resource may be determined in such a manner that the first signal occupies the tth subcarrier of the N subcarriers, t ∈ {0,1, …, N-1} and t mod M ═ Δ, in other words, in the N subcarriers, t takes any one of values from 0 to N-1, and the first signal is inserted at a subcarrier position where t mod M ═ Δ. The first data signal occupies the kth subcarrier of the N subcarriers, k ∈ {0,1, …, N-1} and k mod M ≠ Δ, Δ ∈ {0,1, …, M-1}, in other words, in the N subcarriers,k takes any value from 0 to N-1 and inserts the first data signal at the subcarrier location where k mod M ≠ Δ. M is a positive integer less than N. Wherein M defines the reference signal overhead, i.e. the reference signal overhead occupies the time domain resource

Where mod represents the remainder operation.

Given the values of M and Δ, it can be determined from t mod M Δ which subcarrier locations are used to carry the first signal, and thus it can be determined which subcarriers are used to carry the first data signal in addition to the subcarriers used for the first signal. Where M determines how many more subcarriers are used to carry the first signal and delta determines from the second subcarrier to carry the first signal. Of course, it is also possible to determine which subcarrier locations are used for carrying the first data signal from k mod M ≠ Δ, so that it can be determined which subcarriers are used for carrying the first signal in addition to the subcarriers used for the first data signal.

The frequency domain structure is explained below with reference to specific examples.

In an example, taking Δ equal to 0, M equal to 3, and N equal to 15 as an example, refer to fig. 7a, which is a schematic diagram of a frequency domain structure provided in the embodiment of the present application. As shown in fig. 7a, starting from the 0 th subcarrier for carrying the first signal (denoted RS + IC), 1 subcarrier is left out every 3 subcarriers for carrying the first signal, and the other positions except for the position for carrying the first signal are for carrying the first Data signal (denoted Data). Specifically, when the value of t is 0, 0 mod 3 is equal to 0, that is, the 0 th subcarrier is used for carrying RS + IC; when the value of t is 1, 1 mod 3 is equal to 1 and is not equal to 0, namely the 1 st subcarrier is used for bearing Data; when the value of t is 2, 2 mod 3 is equal to 2 but not equal to 0, that is, the 2 nd subcarrier is used for carrying Data; when the value of t is 3, 3 mod 3 is equal to 0, that is, the 3 rd subcarrier is used for bearing the RS + IC; when the value of t is 4, 4 mod 3 is equal to 1 and is not equal to 0, namely the 4 th subcarrier is used for bearing Data; when the value of t is 5, 5 mod 3 is equal to 2 but not equal to 0, namely the 5 th subcarrier is used for bearing Data; when the value of t is 6, 6 mod 3 is equal to 0, that is, the 3 rd subcarrier is used for bearing RS + IC; by analogy, the 0 th, 3 rd, 6 th, 9 th and 12 th subcarriers in the 15 subcarriers shown in fig. 7a can be obtained to carry RS + IC, and the rest positions are used to carry Data.

In the second example, taking Δ equal to 1, M equal to 3, and N equal to 15 as an example, see fig. 7b, which is another schematic diagram of a frequency domain structure provided in the embodiment of the present application. As shown in fig. 7b, starting from the 1 st subcarrier for carrying the first signal (denoted RS + IC), 1 subcarrier is left out every 3 subcarriers for carrying the first signal, and the other positions except for the position for carrying the first signal are for carrying the first Data signal (denoted Data). Specifically, when the value of t is 0, 0 mod 3 is equal to 0 and is not equal to 1, that is, the 0 th subcarrier is used for carrying Data; when the value of t is 1, 1 mod 3 is equal to 1, that is, the 1 st subcarrier is used for bearing RS + IC; when the value of t is 2, 2 mod 3 is equal to 2 but not equal to 1, that is, the 2 nd subcarrier is used for carrying Data; when the value of t is 3, 3 mod 3 is equal to 0 but not equal to 1, that is, the 3 rd subcarrier is used for carrying Data; when the value of t is 4, 4 mod 3 is equal to 1, that is, the 4 th subcarrier is used for bearing RS + IC; when the value of t is 5, 5 mod 3 is equal to 2 but not equal to 1, namely the 5 th subcarrier is used for bearing Data; when the value of t is 6, 6 mod 3 is equal to 0 but not equal to 1, that is, the 3 rd subcarrier is used for carrying Data; by analogy, the 1 st, 4 th, 7 th, 10 th and 13 th subcarriers in the 15 subcarriers shown in fig. 7b can be obtained to be used for carrying RS + IC, and the rest positions are used for carrying Data.

It should be understood that the frequency domain structures carrying the first signal and the first data signal provided in examples one and two above are only examples and do not pose limitations to the frequency domain structures provided herein.

Further, the intermediate continuous resources except the continuous resources of the first end and the continuous resources except the continuous resources of the second end in the time domain resources carry a fourth signal, and the fourth signal includes third data in the first data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal.

In OFDM symbols, of the header

The sequence value corresponding to the first reference signal of each continuous position is known, and the tail part N_cpThe sequence values corresponding to the second reference signals at the consecutive positions are also known, and the first signal carried by the intermediate consecutive resource can be determined through the sequence value corresponding to the first reference signal whose head is known, the sequence value corresponding to the second reference signal whose tail is known, and the portions to be eliminated, i.e., the first data and the second data, in the data signals at the first end and the second end on the time domain resource.

In a possible implementation manner, the time domain resource is divided into M segments of resources, and a first signal carried in the M segments of resources satisfies the following relationship:

for any M e {1,2, …, M-2, M-1}, the following formula (1) is satisfied:

wherein, w_iFor a first signal carried by the ith resource in the time domain resources, i is an integer from 0 to N-1, and M and N are integers greater than 1. Wherein exp (x) represents e^xAnd denotes multiplication.

The first signal on the time domain resource designed by the above formula (1) may be inserted into a comb structure of the frequency domain resource when the first signal on the time domain resource is transferred to the frequency domain resource, where the first signal occupies the tth subcarrier of the N subcarriers, t ∈ {0,1, …, N-1} and t mod M ═ Δ.

With reference to the example, taking the time domain resource as one OFDM symbol as an example, a process of determining the fourth signal of the middle continuous resource position in one OFDM symbol is described below.

The first signal on the frequency domain resource can be subjected to Fourier transform to obtain a first signal on the time domain resource, and the first signal on the time domain resource can be subjected to inverse Fourier transform to obtain a first signal on the frequency domain resource. In order to enable the first signal (RS + IC) on the frequency domain resource to be converted into the first signal on the time domain resource, after the first signal is added to the first data signal on the time domain resource, the first end and the second end on the time domain resource only have reference signals, and it can be set that the first signal on the frequency domain resource is divided into the first time domain signal and the second time domain signal when the first signal is converted into the time domain resource, and then when the first signal and the first data signal on the frequency domain resource are converted into the time domain resource together, the sum of the first time domain signal, the second time domain signal and the time domain data signal is obtained, that is, the sum of the reference signal, the interference cancellation signal and the first data signal on the time domain resource.

In one example, the first time domain signal is designed as a reference signal and the second time domain signal is designed as a reference cancellation signal, and in one aspect, a header of the first time domain signal is designed as a reference cancellation signal

Setting sequence value to be corresponding to header of reference signal on time domain resource

The sequence values are the same, and N of the tail part of the first time domain signal is converted into N_cpSetting sequence values to be consistent with a header N of a reference signal on a time domain resource_cpThe sequence values are the same. On the other hand, the header of the second time-domain signal

Setting sequence values to a header of a first data signal on a time domain resource

The opposite number of the sequence value is N of the tail part of the second time domain signal_cpSetting sequence values to be equal to tail N of first data signal on time domain resource_cpThe opposite of each sequence value.

Combining these two aspects, the sum of the first reference signal, the first interference cancellation signal and the first data at the first end of the time domain resource can be made to be: header of first time domain signal

Sequence value, header of second time domain signal

Sequence value and header of time domain data signal

Sum of sequence values due to header of second time domain signal

Sequence value and header of time domain data signal

The sequence values are opposite numbers, i.e. they cancel each other, so that only the time domain reference signal header is on the first end of the time domain resource

And (4) sequence values. Similarly, the sum of the second reference signal, the second interference cancellation signal, and the second data at the second end of the time domain resource is: n of tail of first time domain signal_cpN of the tail of the second time domain signal_cpN of the tail of the sequence value and time domain data signal_cpSum of sequence values due to N of tail of second time domain signal_cpN of the tail of the sequence value and time domain data signal_cpThe sequence values are mutually opposite numbersI.e. cancel each other out, so that only N of the tail of the time domain reference signal is on the second end of the time domain resource_cpAnd (4) sequence values.

Next, N is 15, M is 3, and Ncp is 3. In addition, it should be noted that the time domain reference signal referred to in the present application is a reference signal carried on a time domain resource and is not described in detail below.

Taking the sequence value corresponding to the first time domain signal carried on the OFDM symbol as

For example, 2 sequence values of the header of the first time domain signal

Set to 2 sequence values (u) with the header of the time domain reference signal₀,u ₁) The same, the tail 3 sequence values of the first time domain signal

Set to 3 sequence values (u) with the tail of the time domain reference signal₁₂,u ₁₃,u ₁₄) The same is true. Referring to fig. 8a, a diagram of known sequence values of the first time domain signal is shown. As shown in FIG. 8a, the sequence of the known RS corresponding to the first time domain signal is the 0-1 time domain position in the OFDM symbol

And 12 th to 14 th time domain positions

Taking a sequence value corresponding to a second time domain signal loaded on the OFDM symbol as

For example, 2 sequence values of the header of the second time domain signal

Set to 2 sequence values (d) corresponding to the header of the first data signal in the time domain₀,d ₁) Phase inversion number (-d)₀,-d ₁) The tail 3 sequence values of the second time domain signal

Set to be opposite (-d) to the 3 sequence values of the tail of the time domain reference signal₁₂,-d ₁₃,-d ₁₄). Referring to fig. 8b, a diagram of known sequence values of the second time domain signal is shown. As shown in FIG. 8b, the known interference cancellation signal IC corresponding to the second time domain signal has a sequence of 0-1 time domain positions in the OFDM symbol

And 12 th to 14 th time domain positions

Then, sequence values of intermediate continuous time domain positions except for a head and a tail in the first time domain signal and the second time domain signal are set respectively. The OFDM symbol is divided into M sections, any section in the M sections meets the condition that the phase shift of the next section is the same as that of the previous section, and the phase shift of each section is increased compared with that of the first section.

Based on the above formula (1), the sequence value of the first time domain signal occupying the middle continuous time domain position of the OFDM symbol can be obtained by the following formula (2):

when m is 1, it can be changed from formula (2):

the following equation can thus be obtained:

due to the fact that

Is known, so can obtain

When m is 2, it can be obtained from the above formula (2):

the following equation can thus be obtained:

due to the fact that

Is known, so can obtain

Due to the fact that

Is known, so can obtain

Thus, combining the above equations yields the following equation:

due to the fact that

Is known, so can obtain

Therefore, the sequence value corresponding to the first time domain signal is:

based on the same concept as the first time domain signal, based on the above equation (1), the sequence value of the second time domain signal occupying the middle continuous time domain position of the OFDM symbol can be obtained by the following equation (4):

similar to the derivation process of the first time domain signal, the sequence value corresponding to the second time domain signal is:

therefore, the sum of the sequence value corresponding to the first time domain signal and the sequence value corresponding to the second time domain signal is:

by the method, the reference signals can be designed to be carried on the head continuous resource and the tail continuous resource on the time domain resource.

Step 502, the first device determines a first signal and a first data signal carried on a time domain resource.

In this embodiment of the application, there are various implementation manners for the first device to determine the time domain resources occupied by the first signal and the first data signal in step 502.

In one possible implementation, the present application provides a way to combine the first signal and the first data signal on the time domain resources. Specifically, a first signal carried on a time domain resource is designed, a first data signal carried on the frequency domain resource is designed, the first data signal carried on the frequency domain resource is converted into a first data signal carried on the time domain resource, and the first signal carried on the designed time domain resource and the first data signal carried on the designed time domain resource are combined, so that the first signal and the first data signal carried on the time domain resource can be determined.

As an example, the first device may further determine a position occupied by the first data signal on the frequency domain resource, modulate the first data signal onto the frequency domain resource according to the position occupied by the first data signal on the frequency domain resource, further determine the first data signal carried on the time domain resource according to the first data signal modulated onto the frequency domain resource, determine the first signal carried on the time domain resource according to the first data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource, and then combine the first signal carried on the time domain resource and the first data signal carried on the time domain resource.

In another possible implementation, the present application provides a way to combine the first signal and the first data signal on frequency domain resources. Specifically, a first data signal carried on a frequency domain resource is designed, a first signal carried on a time domain resource is designed, the first signal carried on the time domain resource is converted into a first signal carried on the frequency domain resource, the first data signal carried on the frequency domain resource and the first signal carried on the frequency domain resource are combined to obtain the first signal and the first data signal carried on the frequency domain resource, and the first signal and the first data signal carried on the frequency domain resource are converted into the first signal and the first data signal carried on the time domain resource and are sent out.

As an example, the first device may determine a position occupied by the first data signal on the frequency domain resource, modulate the first data signal on the frequency domain resource according to the position occupied by the first data signal on the frequency domain resource, further determine the first data signal carried on the time domain resource according to the first data signal modulated on the frequency domain resource, and determine the first signal carried on the time domain resource according to the first data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource. Then, the first device may determine the first signal carried on the frequency domain resource according to the first signal carried on the time domain resource; then, the first device determines the first signal and the first data signal carried on the time domain resource according to the first data signal carried on the frequency domain resource and the first signal carried on the frequency domain resource.

Based on the two implementation manners, in this embodiment of the application, the first signal (RS + IC) is designed in a time domain structure, and the first data signal is designed in a frequency domain structure, so that the first signal and the first data signal need to be combined, and the first data signal on the frequency domain resource can be converted into the first data signal carried on the time domain resource, and then combined with the first signal carried on the time domain resource; alternatively, the first signal carried on the time domain resource may be converted into the first signal carried on the frequency domain resource, and then combined with the first data signal on the frequency domain resource.

In order to more clearly describe the way the first signal (RS + IC) on the frequency domain resources is constructed, the construction process is described below with reference to a specific embodiment.

First, a time domain reference signal sequence is generated

Multiplication by

Then connecting it to the time domain reference signal sequence

Then, the formation length is

The sequence of (a).

Illustratively, taking N15 and Ncp 3 as an example, the sequence obtained in the first step is as follows:

secondly, inserting the first data signal into the kth subcarrier position of the frequency domain, wherein k belongs to {0,1, …, N-1} and k mod M is not equal to delta, and the positions of the rest subcarriers are filled with zero to obtain a frequency domain sequence, and then transforming the obtained frequency domain sequence to the time domain to obtain a time domain data signal (d)₀,d ₁,…,d _N-2,d _N-1)。

Thirdly, the tail part N of the time domain data signal is processed_cpA symbol

Multiplication by

Then concatenates it at the time domain data signal header

A symbol

Then, the formation length is

The sequence of (a).

Illustratively, if N is 15 and Ncp is 3, the sequence obtained in the third step is as follows:

fourthly, subtracting the sequence constructed in the third step from the sequence constructed in the first step to obtain the sequence with the length of

The sequence of (a).

Exemplarily, N is 15 and Ncp is 3, the sequence obtained in the fourth step is as follows:

a fifth step of multiplying the sequence constructed in the fourth step in order

To obtain M-1 molecules with the length of

The length of M-1 obtained in this step is

The sequence of (A) is sequentially connected to the fourth step to obtain the length of

After the sequence of (c), a time domain (RS + IC) sequence of length N is obtained.

Exemplarily, N is 15, M is 3, and Ncp is 3, then the time domain (RS + IC) sequence with length 15 obtained in the fifth step is:

u ₀-d ₀，u ₁-d ₁，

wherein the content of the first and second substances,

equal to 1.

And sixthly, transforming the time domain (RS + IC) sequence constructed in the fifth step to a frequency domain, thereby obtaining a frequency domain (RS + IC) sequence.

Of course, if only the time domain (RS + IC) sequence needs to be constructed, it can be realized through the first step to the fifth step. In the embodiment of the application, by designing the first signal (RS + IC) sequence carried on the time domain resource, after the first signal carried on the time domain resource is added to the first data signal on the time domain resource, the consecutive resources at the head and tail ends on the time domain resource are all the reference signals.

In step 503, the first device transmits the first signal and the first data signal on the time domain resource.

In the embodiment of the application, a first reference signal in a reference signal occupies continuous resources on a first end of a time domain resource, a second reference signal in the reference signal occupies continuous resources on a second end of the time domain resource, and an interference cancellation signal can be used to cancel interference of a first data signal on the reference signal, so that continuous reference signals are provided at the head and tail ends of the time domain resource, so that unlike the prior art, a data signal and a reference signal are inserted on a frequency domain resource, the data signal and the reference signal on the frequency domain resource are converted into a data signal and a reference signal on the time domain resource, and then the data signal and the reference signal are amplified and transmitted through a PA, and when the data signal and the reference signal on the frequency domain resource are transferred to a time domain, a data signal exists on the whole time domain resource, so that the nonlinear characteristic of the PA can cause interference of the data signal on the reference signal RS, and the problem that the reference signal cannot be estimated due to interference of an unknown data signal exists, according to the embodiment of the application, only the reference signal exists at the first end and only the reference signal exists at the second end of the time domain resource, so that interference of data to the reference signal does not exist, and the reference signal can be estimated even if the reference signals between different sampling points on the first end or the second end interfere with each other due to the known reference signal, so that the problem of crosstalk between the data signal and the reference signal caused by the nonlinear characteristic of the PA can be solved.

Further, before transmitting the first signal and the first data signal on the time domain resource, the first device may further add a cyclic prefix before the first end of the time domain resource, the cyclic prefix being the same as the second reference signal, and the first device may transmit the cyclic prefix, the first signal, and the first data signal on the time domain resource. By adding a cyclic prefix before the first end of the time domain resource, resistance to the effects of inter-carrier interference and multipath delay can be achieved.

The communication system can comprise three parts of a sending device, a channel and a receiving device. The channel refers to a transmission channel of a signal, and may be understood as a transmission medium of the signal. Communication systems are classified into wired communication systems and wireless communication systems according to transmission media. Due to the non-ideal nature of the transmission medium, especially for wireless communication systems, the transmission of signals is always subject to distortions. That is, the signal received by the receiving device is not exactly the same as the signal originally transmitted by the transmitting device. The difference between the two is the distortion of the signal. Also, the distortion of the signal depends on the characteristics of the channel. Therefore, the characteristics of the channel are estimated, which helps to cancel the distortion of the signal and improve the performance of the communication system. The following description will be given taking a receiving apparatus as an example of a second apparatus, which receives a first signal and a first data signal transmitted as a transmitting apparatus.

Based on the steps 501-503, the method of fig. 5 may further include the following steps:

in step 504, the second device receives the first signal and the first data signal sent by the first device on the time domain resource.

The first signal comprises a reference signal and an interference elimination signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resources, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resources, and the interference elimination signal is used for eliminating interference of the first data signal on the reference signal.

Illustratively, the first device transmits a first reference signal carried at a first end of an OFDM symbol, a second reference signal carried at a second end of the OFDM symbol, and a fourth signal carried at a middle continuous resource position of the OFDM symbol to the second device, and the second device receives the fourth reference signal corresponding to the first reference signal at the first end of the OFDM symbol, receives the fifth reference signal corresponding to the second reference signal at the second end of the OFDM symbol, and receives the fifth signal corresponding to the fourth signal at the middle continuous resource position of the OFDM symbol due to possible distortion of the signals.

In step 505, the second device may demodulate to obtain an estimated value of the first data signal according to the first reference signal, the second reference signal, and the received fourth reference signal corresponding to the first reference signal, the fifth reference signal corresponding to the second reference signal, and the fifth signal corresponding to the fourth signal.

In one possible implementation, the second device may determine the estimation model according to the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal. Since the second device knows the first reference signal and the second reference signal transmitted by the first device, and knows the received fourth reference signal and the fifth reference signal, an estimation model can be obtained.

Then, the second device determines a sixth signal corresponding to the fifth signal according to the estimation model and the fifth signal received from the intermediate continuous resource of the time domain resource; the sixth signal is an estimate of a fourth signal transmitted by the first device and carried on the intermediate consecutive resources of the time domain resources, the fourth signal including third data in the first data signal, a third interference canceled signal in the interference canceled signal, and a third reference signal in the reference signal.

Then, the second device determines a seventh signal according to the determined sixth signal, the first reference signal and the second reference signal, where the seventh signal is an estimated value of the first signal and the first data signal, which are sent by the first device and carried on the time domain resource; the second device processes the seventh signal carried on the frequency domain resource according to the seventh signal carried on the time domain resource; and the second equipment demodulates the seventh signal carried on the frequency domain resource to obtain a third data signal, wherein the third data signal is an estimated value of the first data signal. In this way, a third data signal closer to the first data signal transmitted by the first device can be obtained.

After the first device transmits the first signal and the first data signal, since the signal may be distorted by the nonlinear characteristic of the PA when passing through the PA, the signal received by the second device may not be the first signal and the first data signal, for example, a fourth reference signal corresponding to the first reference signal is received on a continuous resource on a first end of the time domain resource, a fifth reference signal corresponding to the second reference signal is received on a continuous resource on a second end, and the first reference signal and the second reference signal are known, so that the relationship between the received signal and the transmitted signal can be obtained according to the received fourth reference signal and the fifth reference signal, and the first reference signal and the second reference signal, and the estimated value of the first data signal can be obtained according to the received fifth signal. Therefore, the reference signals sent by the sending end at the head end and the tail end of the time domain resource occupy continuous resources, unlike the prior art, the data signal and the reference signal are inserted on the frequency domain resource, the data signal and the reference signal on the frequency domain resource are converted into the data signal and the reference signal on the time domain resource, and then are amplified and sent by the PA, and when the data signal and the reference signal on the frequency domain resource are converted to the time domain, the data signal exists on the whole time domain resource, so that the nonlinear characteristic of the PA can cause the interference of the data signal on the reference signal RS, the problem that the reference signal cannot be estimated due to the interference of the unknown data signal on the reference signal exists, the embodiment of the application only has the reference signal at the first end of the time domain resource, and only has the reference signal at the second end, so that the interference of the data on the reference signal does not exist, and the reference signal is known, therefore, even if the reference signals between different sampling points on the first end or the second end interfere with each other, the reference signals can be estimated, and the receiving end can demodulate to obtain an estimated value which is closer to the first device for sending the first data signal.

Optionally, the second device may train the neural network model according to the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal, so as to obtain the estimation model.

How to demodulate the estimated value of the first data signal is described in detail below with reference to fig. 9.

As shown in fig. 9, the pilot sequence in the OFDM symbol transmitted by the first device (transmitting end) is denoted as y (n), that is, the pilot sequence includes: length N_cpHas a cyclic prefix and a header length of

Has a pilot sequence and a tail length of N_cpThe pilot sequence of (1). And the pilot sequence in the OFDM symbol received by the second device is noted asx (N), x (N) comprise pilot sequences occupying positions in the OFDM symbol corresponding to y (N), i.e. having a length of N_cpHas a cyclic prefix and a header length of

Has a pilot sequence and a tail length of N_cpThe pilot sequence of (1). Wherein, x (n) includes the sequence and y (n) includes the sequence, there is a one-to-one correspondence between the positions occupied by the OFDM symbols, but since there may be signal distortion, x (n) includes the sequence and y (n) includes the sequence may be different. Therefore, x (n) can be used as a sample, and y (n) can be used as a label, and the sample is input to the neural network to obtain the neural network parameters, so as to obtain an estimation model, wherein the estimation model can reflect the corresponding relation between the signal sent by the first device and the signal actually received by the second device.

And the sequence received by the second device (receiving end) is carried on the middle continuous resource position in the OFDM symbol

Known, so the sequence will be

Inputting the sequence to the estimation model to obtain the sequence to be estimated

Sequence to be estimated

I.e. the estimated value of the fourth signal, and then derive the estimated value of the first data signal according to the above embodiment.

It should be understood that the above-mentioned pilot sequence is a reference signal, and if the signal transmitted by the first device does not include a cyclic prefix, then the y (n) packetComprises the following steps: the header length is

Has a pilot sequence and a tail length of N_cpThe pilot sequence of (1). Accordingly, x (n) corresponds to x (n) and does not include a cyclic prefix.

Alternatively, the neural network may be an echo state network ESN, and a process of training the echo state network ESN is described below with reference to a specific example.

Referring to fig. 10, a system diagram of a MIMO-OFDM receiver of an ESN network according to an embodiment of the present application is provided.

As shown in fig. 10, the ESN network includes an input layer, a storage layer, and an output layer, and the number of the ESN network input ports is 2N_rThe number of output ports is 2N_tInput matrix

Pool matrix

Output matrix

Feedback matrix

N _neuNumber of reservoir nodes of ESN network, N_rNumber of receiving antennas, N_tIs the number of transmit antennas.

The ESN network is trained as follows:

first, randomly generating Wⁱⁿ,W,W ^fbThen Wⁱⁿ,W,W ^fbIs always unchanged.

In the second step, label y (n) and sample x (n) are input into the ESN network.

First, state C is initialized to zero, i.e., C (0) ═ 0.

Secondly, updating the state by using the sample x (n), the label y (n) and a state updating formula to obtain a series of C values, wherein the state updating formula is as follows:

C(n+1)＝f(W ⁱⁿx(n+1)+WC(n)+W ^fby(n))。

wherein N is N₁,N ₁+1,…,N _K，N ₁And N_KAre all integers, and N_K≥N ₁。

With n being 0, …, n_maxFor example, then the number of training samples is n_max+1. By using front n₀One training sample for state cleaning, i.e. discarding the first n₀State C and corresponding input x (n) and label y (n).

For example, assume n₀＝9，n _maxThen C (0), C (1), … …, C (9) are discarded, C (10), C (11) … …, C (100), x (10), x (11) … …, x (100), y (10), y (11) … …, y (100) are retained,

from samples x (n), n ═ n₀,…,n _maxAnd a state C (n), n ═ n₀,…,n _maxAnd (5) splicing into a matrix S.

In one example, n ═ n₀,…,n _maxThe input data x (n) and the state data C (n) are pieced together to form row vectors, and the row vectors are vertically piled up to form a matrix S, so that the size of the matrix S is (n)_max-n ₀+1)×(N _neu+2N _r) The amount of the solvent to be used is, for example,

then, by the label y (n), n ═ n₀,…,n _maxAnd (5) splicing into a matrix T. N for each n₀,…,n _maxThe tag data y (n) is passed by one (f)^out)-1，(f ^0ut) -1 is f^outIs stacked in the longitudinal direction into a matrix T of size (n)_max-n ₀+1)×2N _t。

For example,

thirdly, calculating an output matrix W from the matrix S and the matrix T by using a linear regression method^outSpecifically, the pseudo-inverse of the matrix S is multiplied by the matrix T to obtain the scale (N)_neu+2N _r)×2N _tMatrix (W)^out) ^TI.e. (W)^out) ^T＝S ⁺And T. Wherein the matrix S is formed by samples x (N), N ═ N₁,N ₁+1,…,N _KAnd a state C (N), N ═ N₁,N ₁+1,…,N _KForming; the matrix T is formed by labels y (N), N ═ N₁,N ₁+1,…,N _KAnd (4) forming.

Obtaining the output matrix W through the above process^outThen according to W^outEstimating a first signal and a first data signal carried on a time domain resource, specifically referring to the following reasoning process:

in the first step, state C is initialized to the last state of the training phase.

Secondly, generating a time domain estimation signal according to the following formula:

wherein f is^outIs an activation function.

Because ESN networks are good at solving the non-linearity problem, using ESN networks for channel estimation can eliminate PA non-linearity effects, and ESN networks have memory, i.e., the current output depends not only on the current input, but also on historical inputs, so that the ESN networks can process and efficiently utilize multipath information.

Based on the same inventive concept as the method embodiment described above, referring to fig. 11, a schematic structural diagram of an apparatus provided in the embodiment of the present application may include a transceiver unit 1101 and a processing unit 1102.

In a possible implementation manner, the apparatus may be applied to a device on the sender side, and the transceiver unit 1101 may be configured to send the first signal and the first data signal to another device. Illustratively, the transceiving unit 1101 performs step 303. The processing unit 1102 may be configured to determine a time domain resource occupied by the first signal and the first data signal, and the specific processing unit 1102 may be configured to implement the function performed by the first device in the foregoing method embodiment.

In a possible implementation, the apparatus may be used for a device on the receiving side, the transceiver unit 1101, to receive the first signal and the first data signal transmitted from other devices. Illustratively, the transceiving unit 1101 may be configured to perform step 504. A processing unit 1102 operable to demodulate a signal transmitted by the transmitting end according to the received signal, and the like, for example, the processing unit 1102 is configured to execute step 505. The specific processing unit 1102 may be adapted to implement the functions performed by the second device in the above-described method embodiments.

Fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application, for example, a schematic structural diagram of a base station. As shown in fig. 12, the base station can be applied to the system shown in fig. 1, and performs the functions of the network device (or the base station) in the above method embodiment. The base station 120 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 1210 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 1220. The RRU1210 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 1211 and a radio frequency unit 1212. The RRU1210 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending the reference signals described in the above embodiments to a terminal device. The BBU1220 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU1210 and the BBU1220 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU1220 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 1220 may be used to control the base station to perform the operation procedure of the above method embodiment with respect to the network device (or base station).

In an example, the BBU1220 may be formed by one or more boards, and the boards may jointly support a radio access network with a single access indication (e.g., an LTE network or a 5G network), or may respectively support radio access networks with different access systems (e.g., an LTE network, a 5G network or other networks). The BBU1220 further includes a memory 1221 and a processor 1222, the memory 1221 being configured to store necessary instructions and data. The processor 1222 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures of the above method embodiments with respect to the network device (or the base station). The memory 1221 and the processor 1222 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

Fig. 13 shows a schematic structural diagram of a communication apparatus 1300. The communication apparatus 1300 may be used to implement the method executed by the first device or the second device described in the above method embodiments, which may be referred to in the description of the above method embodiments. The communication apparatus 1300 may be a chip, a network device (e.g., a base station), a terminal device, etc.

The communications apparatus 1300 includes one or more processors 1301. The processor 1301 may be a general purpose processor, a special purpose processor, or the like. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip), execute a software program, and process data of the software program. The communication device may include a transceiving unit to enable input (reception) and output (transmission) of signals. For example, the communication device may be a chip, and the transceiving unit may be an input and/or output circuit of the chip, or a communication interface. The chip can be used for a terminal or a base station or other network equipment. As another example, the communication device may be a base station or a network device, and the transceiver unit may be a transceiver, a radio frequency chip, or the like.

The communication apparatus 1300 includes one or more processors 1301, and the one or more processors 1301 may implement the method performed by the first device or the second device in the embodiment shown in fig. 5.

In one possible design, the communications apparatus 1300 includes means (means) for generating reference signals, and means (means) for transmitting reference signals. The functions of generating the means for the reference signal and transmitting the means for the reference signal may be implemented by one or more processors. The reference signal may be generated, for example, by one or more processors, and transmitted through a transceiver, or an interface of an input/output circuit, or chip. The reference signal can be found in the related description of the above method embodiments.

In one possible design, the communications apparatus 1300 includes means (means) for receiving reference signals. The reference signal may be received, for example, by a transceiver, or an input/output circuit, or an interface of a chip.

Optionally, the processor 1301 may also implement other functions in addition to implementing the method of the embodiment shown in fig. 5.

Optionally, in one design, the processor 1301 may execute the instructions, so that the communication apparatus 1300 performs the method performed by the first device or the second device described in the above method embodiment. The instructions may be stored in whole or in part in the processor, such as the instruction 1303, or in whole or in part in the memory 1302 coupled to the processor, such as the instruction 1304, or may collectively cause the communication apparatus 1300 to execute the method described in the above method embodiment through the

instructions

1303 and 1304.

In yet another possible design, the communications apparatus 1300 may also include a circuit, which may implement the functions of the first device or the second device in the foregoing method embodiments.

In yet another possible design, the communication device 1300 may include one or more memories 1302 having instructions 1304 stored thereon, which are executable on the processor, so that the communication device 1300 performs the methods described in the above method embodiments. Optionally, the memory may further store data therein. Instructions and/or data may also be stored in the optional processor. For example, the one or more memories 1302 may store various data and the like described in the above embodiments. The processor and the memory may be provided separately or may be integrated together.

In yet another possible design, the communications apparatus 1300 may further include a transceiver 1305 and an antenna 1306. The processor 1301 may be referred to as a processing unit and controls a communication apparatus (terminal or base station). The transceiver 1305, which may be referred to as a transceiver, a transceiving circuit, a transceiver, or the like, is configured to implement transceiving function of a communication device through the antenna 1306.

The application also provides a communication system, which comprises the first device and the second device, wherein the first device can be a network device, and the second device is a terminal device; or, the first device is a network device, and the second device is a network device.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The present application further provides a computer-readable medium, on which a computer program is stored, where the computer program is executed by a computer to implement the communication method in any of the above method embodiments.

The embodiment of the present application further provides a computer program product, and when executed by a computer, the computer program product implements the communication method described in any of the above method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

It should be understood that the processing device may be a chip, the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated in the processor, located external to the processor, or stand-alone.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. Additionally, the terms "system" and "network" are often used interchangeably herein.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include 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. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk 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.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A method of communication, comprising:

the method comprises the steps that a first device determines time domain resources occupied by a first signal and a data signal, wherein the first signal comprises a reference signal and an interference elimination signal, a first reference signal in the reference signal occupies continuous resources on a first end of the time domain resources, a second reference signal in the reference signal occupies continuous resources on a second end of the time domain resources, and the interference elimination signal is used for eliminating interference of the data signal to the reference signal;

the first device determines the first signal and a data signal carried on the time domain resource;

the first device transmits the first signal and the data signal on the time domain resource.
The method of claim 1, further comprising:

the first device determines a position occupied by the data signal on a frequency domain resource;

the first equipment modulates the data signal to the frequency domain resource according to the position occupied by the data signal on the frequency domain resource;

the determining, by the first device, the first signal and the data signal carried on the time domain resource includes:

the first device determines the data signal carried on the time domain resource according to the data signal modulated on the frequency domain resource;

the first device determines the first signal carried on the time domain resource according to the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource;

the first device combines the first signal carried on the time domain resource and the data signal carried on the time domain resource.
The method of claim 2, wherein the first device, after determining the first signal carried on the time domain resource according to the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource, further comprises:

the first device determines the first signal carried on the frequency domain resource according to the first signal carried on the time domain resource;

and the first device determines the first signal and the data signal carried on the time domain resource according to the data signal carried on the frequency domain resource and the first signal carried on the frequency domain resource.
The method of claim 2 or 3, wherein the frequency domain resources comprise N subcarriers, the first signal occupies a t-th subcarrier of the N subcarriers, t ∈ {0,1, …, N-1} and t mod M ═ Δ, the data signal occupies a kth subcarrier of the N subcarriers, k ∈ {0,1, …, N-1} and k mod M ≠ Δ, Δ ∈ {0,1, …, M-1}, N is an integer greater than 1, and M is a positive integer less than N.
The method of any of claims 1-3, wherein a continuous resource on a first end of the time domain resource carries a second signal and first data in the data signal, the second signal comprising the first reference signal and a first interference cancellation signal of the interference cancellation signals, the first interference cancellation signal canceling the first data;

and a continuous resource at a second end of the time domain resource carries a third signal and second data in the data signal, where the third signal includes the second reference signal and a second interference cancellation signal in the interference cancellation signal, and the second interference cancellation signal cancels the second data.
The method of any one of claims 1-5, wherein a middle continuous resource of the time domain resources carries a fourth signal, the fourth signal comprising third data in the data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal, wherein the middle continuous resource is a resource of the time domain resources other than the continuous resource of the first end and the continuous resource of the second end.
The method of claim 6, wherein the time domain resources are divided into M segments of resources, and a first signal carried in the M segments of resources satisfies the following relationship:

for any M e {1,2, …, M-2, M-1}, the following is satisfied:

said w_iAnd taking an integer from 0 to N-1 as i of the signal carried by the ith resource in the time domain resource, wherein both M and N are integers greater than 1.
The method of any of claims 1-7, wherein the first device, prior to transmitting the first signal and the data signal on the time domain resource, further comprises:

the first device adds a cyclic prefix prior to the first end of the time domain resources, the cyclic prefix being the same as the second reference signal;

the first device transmitting the first signal and a data signal on the time domain resource, comprising:

the first device transmits the cyclic prefix, the first signal, and a data signal on the time domain resource.
A method of communication, comprising:

the method comprises the steps that a second device receives a first signal and a first data signal sent by a first device on a time domain resource, the first signal comprises a reference signal and an interference elimination signal, the first reference signal in the reference signal occupies continuous resources on a first end of the time domain resource, the second reference signal in the reference signal occupies continuous resources on a second end of the time domain resource, and the interference elimination signal is used for eliminating interference of the first data signal on the reference signal;

and the second equipment demodulates the first reference signal, the second reference signal, a received fourth reference signal corresponding to the first reference signal, a received fifth reference signal corresponding to the second reference signal and a received fifth signal corresponding to the fourth signal to obtain an estimated value of the first data signal.
The method of claim 9, wherein a continuous resource on a first end of the time domain resource carries a second signal and first data in the first data signal, the second signal comprising the first reference signal and a first interference cancellation signal of the interference cancellation signals, the first interference cancellation signal canceling the first data;

and continuous resources at a second end of the time domain resources carry a third signal and second data in the first data signal, the third signal includes the second reference signal and a second interference cancellation signal in the interference cancellation signals, and the second interference cancellation signal cancels the second data.
The method of claim 10, wherein a middle contiguous resource of the time domain resources carries a fourth signal comprising third data in the first data signal, a third interference cancellation signal in the interference cancellation signal, and a third reference signal in the reference signal, wherein the middle contiguous resource is a resource of the time domain resources other than the contiguous resource of the first end and the contiguous resource of the second end.
The method of claim 11, wherein the time domain resources are divided into M segments of resources, and a first signal carried in the M segments of resources satisfies the following relationship:

for any M e {1,2, …, M-2, M-1}, the condition is satisfied

Said w_iAnd taking an integer from 0 to N-1 as i of the signal carried by the ith resource in the time domain resource, wherein both M and N are integers greater than 1.
The method according to any one of claims 9-12, wherein the second device demodulates the estimated value of the first data signal according to the first reference signal, the second reference signal, and the received fourth reference signal corresponding to the first reference signal, the fifth reference signal corresponding to the second reference signal, and the fifth signal corresponding to the fourth signal, and includes:

the second device determines an estimation model according to the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal;

the second equipment determines a sixth signal corresponding to the fifth signal according to the estimation model and the fifth signal received from the middle continuous resource of the time domain resource; the sixth signal is an estimated value of the fourth signal sent by the first device and carried on a middle continuous resource of the time domain resource; the fourth signal comprises third data in the first data signal, a third interference cancellation signal in the interference cancellation signals, and a third reference signal in the reference signals;

the second device determines a seventh signal according to the determined sixth signal, the first reference signal and the second reference signal, where the seventh signal is an estimated value of the first signal and the first data signal, which are sent by the first device and carried on the time domain resource;

the second device processes the seventh signal carried on the frequency domain resource according to the seventh signal carried on the time domain resource;

and the second equipment demodulates the seventh signal carried on the frequency domain resource to obtain a third data signal, wherein the third data signal is an estimated value of the first data signal.
The method of claim 13, wherein the second device determines an estimation model based on the fourth reference signal and the first reference signal, and the fifth reference signal and the second reference signal, comprising:

and the second equipment trains a neural network model according to the fourth reference signal, the first reference signal, the fifth reference signal and the second reference signal to obtain the estimation model.
The method of claim 14, wherein the neural network is an Echo State Network (ESN).
A communications apparatus, comprising:

a transceiver for receiving and transmitting a signal from the wireless communication device,

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 15.
A computer-readable storage medium, in which a computer program is stored, the computer program comprising program instructions which, when executed by a computer, cause the computer to carry out the method of any one of claims 1 to 8 or the method of any one of claims 9 to 15.