WO2020220344A1

WO2020220344A1 - Communication method and communication device

Info

Publication number: WO2020220344A1
Application number: PCT/CN2019/085368
Authority: WO
Inventors: 王建国; 周永行
Original assignee: 华为技术有限公司
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-11-05
Also published as: CN113767603B; CN113767603A

Abstract

Provided are a communication method and communication device, the method specifically comprising: a first device determining a time-domain resource occupied by a first signal and a data signal, the first signal comprising a reference signal and an interference cancellation signal; a first reference signal in the reference signal occupying continuous resources on a first end of the time domain resource, and a second reference signal in the reference signal occupying continuous resources on a second end of the time domain resource, the interference cancellation signal being used for eliminating the interference of the data signal by the reference signal; the first device determining the first signal and the data signal carried on the time-domain resource; the first device sending the first signal and the data signal on the time-domain resource. Thus the reference signals at the beginning and the end of the time-domain resource may be continuous, and the crosstalk between the data signal and the reference signal caused by the nonlinear characteristics of a PA can be eliminated.

Description

Communication method and communication device

Technical field

This application relates to the field of communication technology, and in particular to a communication method and communication device.

Background technique

A power amplifier (PA) is an indispensable component in a communication system. Since the characteristics of various active devices constituting the PA are non-linear, the PA always exhibits a certain degree of non-linearity. Therefore, when the PA amplifies the signal, it will introduce a certain degree of nonlinear distortion, such as phase distortion and amplitude distortion, into the amplified signal.

A reference signal (reference signal, RS) is a signal with known content, and is sometimes called a pilot signal (pilot signal). The content of the reference signal, that is, the reference signal sequence carried by the reference signal, is generally agreed in advance by the communication system. Therefore, before receiving the reference signal, the receiving device can know the content of the reference signal based on the system configuration. Thereafter, the receiving device obtains the reference signal sequence from the received reference signal, and compares it with the expected reference signal sequence, thereby estimating the characteristics of the channel. The channel characteristics estimated by the receiving device can be used for data signal demodulation. A data signal is a signal that carries data information. Unlike the reference signal, the content of the data signal, that is, the data information, is unknown to the receiving device. However, with the aid of the estimated channel characteristics, the receiving device can still correctly demodulate the data information from the data signal transmitted by the channel, thereby completing the communication goal.

In the existing RS pattern (pattern), RS and data information are arranged in frequency domain multiplexing. As shown in Figure 1, a comb-like arrangement structure is presented in the frequency domain, that is, a fixed number of sub-intervals are arranged in the frequency domain. RS is carried on the carrier. If the RS on a certain resource element (RE) is extracted, 0 is added to other REs, and the frequency domain signal corresponding to the extracted RS is converted into a time domain signal through inverse fast fourier transform (IFFT) , And feed the time-domain signal corresponding to RS to the PA. Due to the influence of the non-linear characteristics of the PA, the different sampling points of the time-domain signal will be amplified by different multiples through the PA, so that the time-domain signal is passed through Fourier at the receiving end After the fast fourier transform (FFT) is converted into a frequency domain signal, not only the RS itself will be distorted, but the RS will also cause interference to adjacent subcarriers.

In order to eliminate the influence of PA nonlinearity, a digital pre-distortion (DPD) system is used in the transmitter, as shown in Figure 2, where the DPD module is placed before the PA, and its function is to generate and complement the PA nonlinear characteristics The predistortion signal is introduced into the signal to be transmitted to form a predistortion signal. The predistortion signal undergoes digital-to-analog conversion (DAC) and up-conversion into a radio frequency signal, and then feeds it to the PA. The output signal of the PA is down-converted into a baseband signal, and fed back to the DPD module through an analog-to-digital conversion (ADC), as the auxiliary decision information of the DPD module, forming a closed loop. Therefore, before sending the transmission signal to the PA, the amplitude and phase of the transmission signal can be pre-distorted to partially compensate the subsequent PA nonlinear distortion, so that the DPD module and the PA as a whole look like a PA with good linearity. However, this solution can only partially eliminate the non-linear effects of PA. The performance parameters of the DPD module are statically configured for the specific non-linear characteristics of the PA, which means that the DPD module can only be used to eliminate the specific non-linear characteristics of the PA after configuration. However, the non-linear characteristics of PA will dynamically change due to the influence of device temperature, etc. If the non-linear characteristics of PA change, DPD cannot eliminate the non-linear influence of PA after the change. In addition, some terminals and small base stations do not have a DPD module, and therefore cannot use a digital predistortion (DPD) module to eliminate the influence of the non-linear characteristics of the PA on the RS.

Summary of the invention

The present application provides a communication method and communication device to eliminate the influence of the nonlinear characteristics of the PA on the RS.

In a first aspect, an embodiment of the present application provides a communication method, which may be executed by a first device, and includes: the first device determines time domain resources occupied by a first signal and a data signal, where the first signal includes a reference signal And the interference cancellation signal, the first reference signal in the reference signal occupies the continuous resource on the first end of the time domain resource, the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource, the interference cancellation signal It is used to eliminate the interference of the data signal to the reference signal; the first device determines the first signal and the data signal carried on the time domain resource; the first device sends the first signal and the data signal on the time domain resource.

Based on this solution, since the first reference signal in the reference signal occupies the continuous resource on the first end of the time domain resource, the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource, and the interference cancellation signal can It is used to eliminate the interference of the data signal to the reference signal, so that the reference signal at the beginning and the end of the time domain resource can be continuous. Unlike the existing method, the data signal and the reference signal are inserted into the frequency domain resource and then converted to the time domain resource Therefore, there will be data signals on the entire time domain resource after conversion, which leads to the problem that the reference signal cannot be estimated due to the interference of the unknown data signal on the reference signal. In this application, the continuous resources at both ends of the time domain resource are designed. It is a reference signal, the reference signal is known, so even if the reference signal between different sampling points on the first end or the second end interferes with each other, the reference signal can be estimated. Therefore, the data signal caused by the nonlinear characteristics of the PA can be eliminated And the crosstalk between the reference signal.

Further, there are multiple implementation manners for the first device to determine the first signal and data signal carried on the time domain resource, which specifically may include but not limited to the following two implementation manners:

In the first implementation mode, the first device can also determine the position occupied by the data signal on the frequency domain resource, and modulate the data signal to 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 for the data signal on the frequency domain resource, and then determine the data signal carried on the time domain resource based on the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource To carry the first signal, the first device combines the first signal carried on the time domain resource and the data signal carried on the time domain resource.

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

Implementation manner 2: 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 time domain resource according to The first signal carried on the time domain resource determines the first signal carried on the frequency domain resource; then, the first device modulates the data signal carried on the frequency domain resource and the first signal carried on the frequency domain resource , Determine the first signal and data signal carried on the time domain resource.

In this way, a way to combine 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 involved in this application can be obtained from each other through Fourier transform or inverse Fourier transform. The difference between the two is the manifestation of the first signal The difference is that the sequence value corresponding to the first signal on the frequency domain resource is the expression in the frequency domain, while the sequence value corresponding to the first signal on the time domain resource is the expression in the time domain, so the frequency The sequence value corresponding to the first signal on the domain resource is different from the sequence value corresponding to the first signal on the time domain resource and can be mutually converted. Based on the same principle, the first data signal on frequency domain resources and the first data signal on time domain resources are only different in form. The same applies to other signals on frequency domain resources and other signals on time domain resources. , I won’t repeat it in the following text.

In a possible design, the frequency domain resource includes N subcarriers, the first signal occupies the tth subcarrier among the N subcarriers, t∈{0,1,...,N-1} and t mod M=Δ, The data signal occupies the kth subcarrier among the N subcarriers, k∈{0,1,...,N-1} and k mod M≠Δ,Δ∈{0,1,...,M-1}, N is greater than An integer of 1, and M is a positive integer less than N.

Through this design, an arrangement mode (or sequence structure) of the first signal and the data signal on the frequency domain resources is provided, where Δ can determine the number of subcarriers to be vacated for inserting the first signal. M may determine how many subcarriers are spaced apart and one subcarrier is used to insert the first signal, and the other unvacated subcarriers are used to insert the first data signal.

In a possible design, the continuous resource on the first end of the time domain resource carries the second signal and the first data in the data signal, and the second signal includes the first reference signal and the first in the interference cancellation signal. Interference cancellation signal, the first interference cancellation signal is cancelled with the first data; the continuous resource on the second end of the time domain resource carries the third signal and the second data in the data signal, and the third signal includes the second reference signal and The second interference cancellation signal in the interference cancellation signal, the second interference cancellation signal and the second data are cancelled.

With this design, the first end of the time domain resource carries the first reference signal, the first interference cancellation signal, and the first data, where the first interference cancellation signal and the first data cancel out, so that the first end of the time domain resource There is only the first reference signal on the second end, and the second reference signal, the second interference cancellation signal and the second data are carried on the second end. The second interference cancellation signal and the second data are cancelled, so that only the second end of the time domain resource The second reference signal can realize that there is no interference of the data signal to the reference signal on both ends of the time domain resource.

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

In a possible design, the time domain resources are divided into M resources, and the first signal carried in the M resources satisfies the following relationship: for any m∈{1,2,...,M-2,M-1}, it satisfies

Wi is a signal carried by the i-th resource in the time domain resource, i is an integer between 0 and N-1, and both M and N are integers greater than 1. Among them, exp(x) represents e ^x .

Through this design, the first reference signal known on the first end of the time domain resource and the second reference signal known on the second end of the time domain resource, and the above-mentioned relationship can be used to determine the first reference signal carried on the intermediate continuous resource of the time domain resource. The content of a signal. Therefore, when the first signal on the time domain resource is transferred to the frequency domain resource, the first signal is inserted into the comb structure of the frequency domain resource, where the first signal occupies the t th subcarrier among the N subcarriers, t ∈{0,1,...,N-1} and t mod M=Δ.

In a possible design, before sending the first signal and the data signal on the time domain resource, the first device may also add a cyclic prefix before the first end of the time domain resource, and the cyclic prefix is the same as the second reference signal; The device can send the cyclic prefix, the first signal, and the data signal on the time domain resource.

Through this design, the cyclic prefix is added before the first end of the time domain resource, which can resist the influence of inter-carrier interference and multipath delay.

In the second aspect, the embodiments of the present application provide a communication method, which can be executed by a second device, and includes: the second device receives the first signal and the first data signal sent by the first device on time domain resources; A signal includes a reference signal and an interference cancellation signal. The first reference signal in the reference signal occupies the continuous resource on the first end of the time domain resource, and the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource. Resource, the interference cancellation signal is used to eliminate the interference of the first data signal to the reference signal; the second device can be based on the first reference signal, the second reference signal, and the fourth reference signal and the second reference signal corresponding to the received first reference signal. The fifth reference signal corresponding to the reference signal and the fifth signal corresponding to the fourth signal are demodulated to obtain the estimated value of the first data signal.

Based on this solution, after the first device sends the first signal and the first data signal, the signal may be distorted due to the nonlinear characteristics of the PA when it passes through the PA, so the signal received by the second device may not be the first signal. A signal and a first data signal, for example, a fourth reference signal corresponding to the first reference signal is received on a continuous resource on the first end of a time domain resource, and a fourth reference signal corresponding to the first reference signal is received on a continuous resource on the second end. The fifth reference signal corresponding to the second reference signal, and the first reference signal and the second reference signal are known, so according to the received fourth reference signal and the fifth reference signal, as well as the first reference signal and the second reference signal, it can be obtained The relationship between the received signal and the transmitted signal, and the received fifth signal obtains the estimated value of the first data signal. In this way, the reference signals sent by the sender at the beginning and end of the time domain resource occupy continuous resources. Unlike the prior art, the data signal and reference signal are inserted on the frequency domain resource, and then the data signal and reference on the frequency domain resource are inserted. The signal is converted into the data signal and reference signal on the time domain resource, and then amplified by the PA and sent. When the data signal and reference signal on the frequency domain resource are transferred to the time domain, the data signal exists on the entire time domain resource. Therefore, the non-linear characteristics of the PA will cause the data signal to interfere with the reference signal RS, and there is a problem that the unknown data signal interferes with the reference signal and the reference signal cannot be estimated. The embodiment of the present application has only the reference signal at the first end of the time domain resource. , The second end also only has a reference signal, so there is no data interference to the reference signal. Since the reference signal is known, it can be estimated even if there is mutual interference between reference signals at different sampling points on the first end or the second end After the reference signal is generated, the receiving end can demodulate and obtain an estimated value closer to the first data signal sent by the first device.

In a possible design, the continuous resource on the first end of the time domain resource carries the second signal and the first data in the first data signal, and the second signal includes the first reference signal and the first data in the interference cancellation signal. An interference cancellation signal, the first interference cancellation signal is cancelled with the first data; the continuous resource on the second end of the time domain resource carries the third signal and the second data in the first data signal, and the third signal includes the second The second interference cancellation signal in the reference signal and the interference cancellation signal, the second interference cancellation signal and the second data are cancelled.

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

W _{i is} the signal carried by the i-th resource in the time domain resource, i is an integer between 0 and N-1, and both M and N are integers greater than 1.

In a possible design, the second device can 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; the second device can determine the estimation model according to the estimation model and the intermediate time domain resource. The fifth signal received on the continuous resource determines the sixth signal corresponding to the fifth signal; the sixth signal is the estimated value of the fourth signal sent by the first device and carried on the continuous resource in the middle of the time domain resource The fourth signal includes the third data in the first data signal, the third interference cancellation signal in the interference cancellation signal, and the third reference signal in the reference signal; the second device determines the sixth signal and the first reference signal according to , And the second reference signal, determine the seventh signal, the seventh signal is the estimated value of the first signal and the first data signal carried on the time domain resource sent by the first device; The carried seventh signal is processed into the seventh signal carried on the frequency domain resource; the second device demodulates the third data signal according to the seventh signal carried on the frequency domain resource, and the third data signal is the first data The estimated value of the signal.

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

In a 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 to obtain the estimation model. Optionally, the neural network may be an echo state network ESN.

In the third aspect, a communication device is provided. The device provided in the present application has the function of realizing the behavior of the first device or the second device in the foregoing method, and includes means for executing the steps or functions described in the foregoing method. The steps or functions can be realized by software, or by hardware (such as a circuit), or by a combination of hardware and software.

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

Optionally, the device may further include one or more memories, where the memory is used for coupling with the processor and stores necessary program instructions and/or data for the device. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

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 be a base station, gNB or TRP, etc., 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 interface of a communication chip.

In another possible design, the above device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory so that the device executes the first aspect or any one of the first aspect The method completed by the first device in the possible implementation manner, or the method completed by the second device in the second aspect or any one of the possible implementation manners of the second aspect is executed.

In a fourth aspect, a system is provided, which includes the first device in the first aspect and the second device in the second aspect.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program. The computer program includes instructions for executing the method in the first aspect or any one of the possible implementations of the first aspect, or includes Instructions for executing the method in the second aspect or any one of the possible implementation manners of the second aspect.

In a sixth aspect, a computer program product is provided, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the first aspect or any one of the first aspects The method in the possible implementation manners, or the method in the second aspect or any one of the possible implementation manners of the second aspect is executed.

Description of the drawings

FIG. 1 is a schematic diagram of a reference signal RS pattern provided by an embodiment of this application;

FIG. 2 is a schematic diagram of a digital predistortion system provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a communication system provided by an embodiment of this application;

FIG. 4 is a schematic diagram of a communication system provided by an embodiment of this application;

FIG. 5 is a schematic diagram of a communication method provided by an embodiment of this application;

6 is a schematic structural diagram of a reference signal occupation position in an OFDM symbol provided by an embodiment of this application;

FIG. 7a is a schematic diagram of a frequency domain structure provided by an embodiment of this application;

FIG. 7b is a schematic diagram of another frequency domain structure provided by an embodiment of this application;

FIG. 8a is a schematic diagram of a known sequence value of a first time domain signal provided by an embodiment of this application;

FIG. 8b is a schematic diagram of a known sequence value of a second time domain signal provided by an embodiment of this application;

FIG. 9 is a schematic diagram of a time domain signal structure provided by an embodiment of this application;

FIG. 10 is a schematic diagram of a system of a MIMO-OFDM receiver of an ESN network provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of a network device provided by an embodiment of this application;

FIG. 13 is a schematic structural diagram of another communication device provided by an embodiment of this application.

Detailed ways

The embodiments of the present application will be described in further detail below in conjunction with the accompanying drawings.

The embodiments of this application can be applied to but not limited to 5G systems, such as NR systems, and can also be applied to LTE systems, long-term evolution-advanced (LTE-A) systems, and enhanced long-term evolution technologies (enhanced long term evolution). -advanced (eLTE) and other communication systems can also be extended to related cellular systems such as wireless fidelity (WiFi), worldwide interoperability for microwave access (wimax), and 3GPP. Specifically, the communication system architecture applied in the embodiment of the present application may be as shown in FIG. 3, including at least two network devices, namely network device 1 and network device 2. Network device 1 serves terminal device 1, and network device 2 serves于terminal equipment 2. The network device 1 and the network device 2 may be network devices that are geographically separated relatively far apart. It should be noted that the embodiments of this application do not limit the number of terminal devices and network devices in the communication system shown in FIG. 3.

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

1) Network equipment is the equipment that connects the terminal to the wireless network in the communication system. The network device is a node in a radio access network, which can also be called a base station, or a radio access network (RAN) node (or device). In the following description, a base station is used as an example. At present, some examples of network equipment are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit) , BBU), or 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. This structure splits the protocol layer of the eNB in the long-term evolution (LTE) system. Some of the protocol layer functions are placed under the centralized control of the CU, and some or all of the protocol layer functions are distributed in the DU. Centralized control of DU.

2) Terminals, also known as terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., are a way to provide users with voice and/or data Connected devices, for example, handheld devices with wireless connectivity, vehicle-mounted devices, etc. At present, some examples of terminals are: mobile phones (mobile phones), tablets, notebook computers, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, and augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid) The wireless terminal in the transportation safety (transportation safety), the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc.

3) Orthogonal frequency division system:

Orthogonal frequency division multiplexing (OFDM) communication systems are multi-carrier systems. In the frequency domain, one OFDM symbol occupies multiple orthogonal subcarriers. In the time domain, an OFDM symbol includes multiple samples, also called sampling points; the signal carried by an OFDM symbol is a signal obtained by superimposing N orthogonal subcarrier signals. An OFDM symbol is usually generated by first carrying the signal to be transmitted in the frequency domain, and then converting it into the time domain through inverse Fourier transform. Optionally, the OFDM symbols converted into the time domain can also be added with a cyclic prefix (CP), that is, several sampling points at the end are added to the head end as a CP to form an OFDM symbol with a CP, see Figure 4 Show. In Figure 4, a square in the frequency domain sequence represents one or more subcarriers, and a square in the time domain sequence represents one or more samples.

In the prior art, the transmitting device uses the existing RS pattern (pattern), the RS and data information are arranged in frequency domain multiplexing, and then the RS and data information on the frequency domain resources are converted into the RS and data information on the time domain resources. After the data information, it is amplified by PA before transmission. On the one hand, the data signal and reference signal in the existing RS mode are inserted on the frequency domain resource, and the data signal and reference signal on the frequency domain resource are converted into the time domain resource. The data signal and reference signal are amplified by the PA and sent, and when the data signal and reference signal on the frequency domain resource are transferred to the time domain, the data signal exists on the entire time domain resource, so the non-linear characteristics of the PA will cause the data The signal interferes with the reference signal RS, and the data signal is unknown, so the interference to the reference signal cannot be estimated. Therefore, the influence of the non-linear characteristics of the PA on the RS cannot be eliminated. On the other hand, after the receiving device receives the reference signal , Channel estimation can be performed based on the reference signal, so as to estimate the data information originally sent by the sending device, but because the received reference signal is distorted, it is difficult for the receiving device to accurately estimate the channel.

Based on this, the embodiments of the present application provide a communication method and device to solve the problem of the influence of the nonlinear characteristic of the PA on the RS in the prior art. Among them, the method and the device are based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

In the following, the first device is the sending device and the second device is the receiving device as an example. If the first device is a terminal device, then the second device is a network device; if the first device is a network device, then the second device For terminal equipment. It should be understood that the second device may also be used as a sending device. In this case, the first device is used as a receiving device. In the description of the embodiments of the present application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order. I won't repeat it later.

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

In order to eliminate the influence of the non-sexual characteristics of the PA on the RS, the embodiment of the present application designs a comb-like arrangement of the data on the frequency domain resource without changing the comb arrangement of the data on the frequency domain resource, and the reference signal is arranged on the frequency domain resource. A structure arranged in time domain resources, in which an interference cancellation signal is added to the subcarriers used to carry the reference signal, and the interference cancellation signal is used to eliminate the interference of the data signal to the reference signal, so that the end and the end of an OFDM symbol are continuous Therefore, the transmitted signal carried on the time domain resource is not affected by the nonlinear characteristics of the PA.

Refer to FIG. 5, which is a schematic flowchart of a communication method provided by an embodiment of this application. The method may include the following steps:

Step 501: The first device determines the time domain resources occupied by the first signal and the first data signal.

Among them, the first signal includes a reference signal (which can be expressed as RS) and an interference cancellation signal (which can be expressed as an IC), the reference signal includes the first reference signal and the second reference signal, and the first reference signal in the reference signal occupies time domain resources The continuous resource on the first end of the reference signal, the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource, and the interference cancellation signal is used to eliminate the interference of the first data signal to the reference signal. Optionally, the reference signal further includes a third reference signal.

In a possible implementation, the continuous resource on the first end of the time domain resource carries the second signal and the first data in the first data signal, where the second signal includes the first reference signal and the interference cancellation signal The first interference cancellation signal in, that is, the first end of the time domain resource includes the first reference signal, the first interference cancellation signal, and the first data. The first interference cancellation signal and the first data cancel out, therefore, Only the first reference signal remains on the continuous resource at the first end of the time domain resource. Based on the same concept, the continuous resource on the second end of the time domain resource carries the third signal and the second data in the first data signal, and the third signal includes the second reference signal and the second interference cancellation in the interference cancellation signal. 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. The second interference cancellation signal and the second data are canceled. Therefore, the second end of the time domain resource Only the second reference signal remains on the continuous resources on the end. In this way, the continuous resources at the first end of the time domain resources and the continuous resources at the second end only have reference signals, and unlike the prior art, the data signals and reference signals are inserted on the frequency domain resources and then the frequency The data signal and reference signal on the domain resource are converted into the data signal and reference signal on the time domain resource, and then amplified by PA and sent. When the data signal and reference signal on the frequency domain resource are transferred to the time domain, the entire time There are data signals in the domain resources, so the non-linear characteristics of the PA will cause the data signal to interfere with the reference signal RS, and there is a problem that the unknown data signal causes interference to the reference signal and the reference signal cannot be estimated. The embodiment of this application is in the time domain The first end of the resource only has the reference signal, and the second end only has the reference signal, so there is no interference from the data to the reference signal. Since the reference signal is known, even if there is a difference between different sampling points on the first end or the second end The reference signal interferes with each other, and the reference signal can also be estimated. Therefore, the crosstalk between the data signal and the reference signal caused by the nonlinear characteristics of the PA can be eliminated.

Moreover, when any two OFDM symbols are connected, the second end of one OFDM symbol is connected to the first end of the other OFDM symbol, so the continuous position where the two OFDM symbols are connected is also the reference signal, which can reduce the difference between the data and the reference signal. Multipath interference.

In an example, the OFDM symbol includes N sequence values, u=(u ₀ , u ₁ , u ₂ ,..., u _N-3 , u _N-2 , u _N-1 ), where the first reference signal occupies the The length of the OFDM symbol header is

The continuous time domain position of, can be expressed as

The second reference signal occupies the continuous time domain position of the OFDM symbol tail length N _cp , which can be expressed as

Among them, N _cp is the length of the cyclic prefix (CP), and M is a positive integer, which defines the reference signal overhead, that is, the reference signal overhead occupies the OFDM resource

Take N equals 15, M equals 3, and Ncp equals 3 as an example.

Refer to Figure 6, which is a structural diagram of the occupied position of the reference signal in the OFDM symbol. As shown in Figure 6, the OFDM symbol includes 15 sequence values,

Equal to 2, that is, 2 consecutive time-domain positions (u ₀ , u ₁ ) in the header of an OFDM symbol (u ₀ , u ₁ ,..., u ₁₂ , u ₁₃ , u ₁₄ ) are the first reference signal, and N _cp is equal to 3. , i.e., the OFDM symbol _{_{(u 0, u 1, ......}} , u 12, u 13, u 14) of the tail portion 3 contiguous time domain positions _{_{(u 12, u 13, u}} 14) of the second reference signal.

Based on any of the foregoing possible implementation manners, a frequency domain resource including N subcarriers is taken as an example, where N is an integer greater than 1. The arrangement of the first signal and the first data signal on the frequency domain resources can be determined in the following manner. The first signal occupies the t-th sub-carrier among the N sub-carriers, t∈{0,1,...,N-1} and t mod M=Δ, in other words, among N subcarriers, t takes any value from 0 to N-1, and inserts the first signal at the subcarrier position where t mod M=Δ. The first data signal occupies the kth subcarrier among the N subcarriers, k∈{0,1,...,N-1} and k mod M≠Δ,Δ∈{0,1,...,M-1}, in other words , Among the N subcarriers, k takes any value from 0 to N-1, and inserts the first data signal at the subcarrier position where k mod M≠Δ. M is a positive integer less than N. Among them, M defines the reference signal overhead, that is, the reference signal overhead occupies the time domain resources

Among them, mod represents the remainder operation.

If the values of M and Δ are given, it is possible to determine which subcarrier positions are used to carry the first signal according to tmod M=Δ, so that it can be determined that the subcarriers except for the first signal are used to carry the first data signal. Among them, M determines how many subcarriers are used to carry the first signal, and Δ determines how many subcarriers are used to carry the first signal. Of course, it is also possible to determine which sub-carrier positions are used to carry the first data signal according to k mod M≠Δ, so that it can be determined that the sub-carriers except for the first data signal are used to carry the first signal.

The following describes the frequency domain structure with specific examples.

Example 1: Taking Δ equals 0, M equals 3, and N equals 15 as an example, see FIG. 7a, which is a schematic diagram of a frequency domain structure provided in an embodiment of this application. As shown in Figure 7a, starting from the 0th subcarrier, it is used to carry the first signal (represented as RS+IC), and one subcarrier is vacated for carrying the first signal every three subcarriers, except for the subcarrier used to carry the first signal. Locations other than the location are used to carry the first data signal (denoted as Data). Specifically, when the value of t is 0, 0 mod 3 is equal to 0, that is, the 0th subcarrier is used to carry RS+IC; when the value of t is 1, 1 mod 3 is equal to 1 and not equal to 0, that is The first subcarrier is used to carry Data; when the value of t is 2, 2 mod 3 is equal to 2 and not equal to 0, that is, the second subcarrier is used to carry Data; when the value of t is 3, 3 mod 3 Equal to 0, that is, the third subcarrier is used to carry RS+IC; when the value of t is 4, 4 mod 3 is equal to 1 but not equal to 0, that is, the fourth subcarrier is used to carry Data; when the value of t is At 5, 5 mod 3 is equal to 2 but not equal to 0, that is, the fifth subcarrier is used to carry Data; when the value of t is 6, 6 mod 3 is equal to 0, that is, the third subcarrier is used to carry RS+IC; By analogy, it can be obtained that among the 15 subcarriers shown in FIG. 7a, the 0th, 3rd, 6th, 9th, and 12th subcarriers are used to carry RS+IC, and the remaining positions are used to carry Data.

Example 2: Taking Δ equals 1, M equals 3, and N equals 15 as an example, refer to FIG. 7b, which is another schematic diagram of frequency domain structure provided by an embodiment of this application. As shown in Figure 7b, the first subcarrier is used to carry the first signal (represented as RS+IC), and one subcarrier is vacated for carrying the first signal every three subcarriers, except for the first signal. Locations other than the location are used to carry the first data signal (denoted as Data). Specifically, when the value of t is 0, 0 mod 3 is equal to 0 but not equal to 1, that is, the 0th subcarrier is used to carry Data; when the value of t is 1, 1 mod 3 is equal to 1, that is, the first Subcarriers are used to carry RS+IC; when the value of t is 2, 2 mod 3 is equal to 2 but not equal to 1, that is, the second subcarrier is used to carry Data; when the value of t is 3, 3 mod 3 Equal to 0 but not equal to 1, that is, the third subcarrier is used to carry Data; when the value of t is 4, 4 mod 3 is equal to 1, that is, the fourth subcarrier is used to carry RS+IC; when the value of t is At 5, 5 mod 3 is equal to 2 but not equal to 1, that is, the fifth subcarrier is used to carry Data; when the value of t is 6, 6 mod 3 is equal to 0 but not equal to 1, that is, the third subcarrier is used to carry Data; and so on, it can be obtained that among the 15 subcarriers shown in Figure 7b, the first, fourth, seventh, tenth, and 13th subcarriers are used to carry RS+IC, and the remaining positions are used to carry Data.

It should be understood that the frequency domain structure carrying the first signal and the first data signal provided in the foregoing example 1 and example 2 are merely examples, and does not limit the frequency domain structure provided in the present application.

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

In the OFDM symbol, the header

The sequence value corresponding to the first reference signal at consecutive positions is known, and the sequence value corresponding to the second reference signal at the tail N _cp consecutive positions is also known. The sequence corresponding to the first reference signal known at the head can be used The value and the sequence value corresponding to the second reference signal whose tail is known, and the part to be eliminated in the data signal on the first end and the second end of the time domain resource, namely the first data and the second data, determine the middle continuous The first signal carried by the resource.

In a possible implementation manner, the time domain resources are divided into M-segment resources, and the first signal carried in the M-segment resources satisfies the following relationship:

For any m∈{1,2,...,M-2,M-1}, the following formula (1) is satisfied:

Wherein, w _{i is} the first signal carried by the i-th resource in the time domain resource, i is an integer between 0 and N-1, and both M and N are integers greater than 1. Among them, exp(x) means e ^x and * means multiplication.

The first signal on the time domain resource designed by the above formula (1) can make the first signal on the time domain resource transfer to the frequency domain resource, the first signal is inserted into the comb structure of the frequency domain resource, where , The first signal occupies the t-th sub-carrier among the N sub-carriers, t∈{0,1,...,N-1} and t mod M=Δ.

In the following, in conjunction with an example, taking the time domain resource as an OFDM symbol as an example, the process of determining the fourth signal of the middle continuous resource position in an OFDM symbol will be described.

The first signal on the frequency domain resource may be subjected to Fourier transform to obtain the first signal on the time domain resource, and the first signal on the time domain resource may be subjected to inverse Fourier transform to obtain the first signal on the frequency domain resource. In order to convert the first signal (RS+IC) on the frequency domain resource into the first signal on the time domain resource, add the first data signal on the time domain resource to the first end and the second signal on the time domain resource. The terminal only has a reference signal. When the first signal on the frequency domain resource is converted into a time domain resource, it can be divided into the first time domain signal and the second time domain signal. Then the first signal and the first data on the frequency domain resource When the signals are converted to time domain resources together, the sum of the first time domain signal, the second time domain signal and the time domain data signal is obtained, which 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. On the one hand, the first part of the first time domain signal is

The sequence value is set as the header of the reference signal on the time domain resource

Identical sequence values, the sequence value N _cp end of a first time-domain signal sequence to N _cp value and the reference signal in the time domain resource is the same as the first portion. On the other hand, the first part of the second time domain signal

A sequence value is set as the header of the first data signal on the time domain resource

The inverse number of sequence values, the N _cp sequence values at the tail of the second time domain signal are set to the inverse numbers of the N _cp sequence values at the tail of the first data signal on the time domain resource.

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

Sequence value, the first part of the second time domain signal

The header of a sequence value and time domain data signal

The sum of the sequence values, due to the first part of the second time domain signal

The header of a sequence value and time domain data signal

The sequence values are opposite to each other, that is, they cancel each other, so the first end of the time domain resource only has the first part of the time domain reference signal

Sequence values. Similarly, the sum of the second reference signal, the second interference cancellation signal, and the second data on the second end of the time domain resource is: N _cp sequence values at the tail of the first time domain signal, N _cp tail tail sequence and the time domain data values of N _cp signal sequence values and, since the sequence value of N _cp N _cp tail sequence signal time domain data values and the second end of the time domain signal The numbers are opposite to each other, that is, they cancel each other, so the second end of the time domain resource only has N _cp sequence values at the tail of the time domain reference signal.

Take N=15, M=3, and Ncp=3 as an example for description. In addition, it should be noted that the time-domain reference signals involved in this application are reference signals carried on time-domain resources and will not be described in detail below.

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

As an example, take the 2 sequence values of the header of the first time domain signal

Set to be the same as the 2 sequence values (u ₀ , u ₁ ) at the head of the time domain reference signal, and set the 3 sequence values at the tail of the first time domain signal

Set to be the same as the 3 sequence values (u ₁₂ , u ₁₃ , u ₁₄ ) at the tail of the time domain reference signal. Refer to Figure 8a, which is a schematic diagram of the known sequence value of the first time domain signal. As shown in Figure 8a, the known RS sequence corresponding to the first time domain signal is the 0-1th time domain position in the OFDM symbol

And the 12th-14th time domain positions

Take the sequence value corresponding to the second time domain signal carried on the OFDM symbol

As an example, take the 2 sequence values of the first part of the second time domain signal

Set to the inverse number (-d ₀ , -d ₁ ) of the two sequence values (d ₀ , d ₁ ) of the first data signal in the time domain, and convert the three sequences of the second time domain signal to the tail value

Set to the inverse number (-d ₁₂ , -d ₁₃ , -d ₁₄ ) of the 3 sequence values at the tail of the time domain reference signal. Refer to Figure 8b, which is a schematic diagram of the known sequence value of the second time domain signal. As shown in Figure 8b, the sequence of the known interference cancellation signal IC corresponding to the second time domain signal is the 0-1 time domain position in the OFDM symbol

And the 12th-14th time domain positions

Afterwards, the sequence values of the intermediate consecutive time domain positions except for the header and the tail in the first time domain signal and the second time domain signal are respectively set. Divide the OFDM symbol into M segments, any of the M segments meets that the phase shift of the latter segment is the same as that of the previous segment, and each segment has an increasing phase shift compared to the first segment.

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

When m=1, the formula (2) can be changed to:

From this, the following equation can be obtained:

due to

Known, so you can get

When m=2, the above formula (2) can be obtained:

From this, the following equation can be obtained:

due to

Known, so you can get

due to

Known, so you can get

Therefore, combining the above formulas can get the following equation:

due to

Known, so you can get

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 formula (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 formula (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:

Through the above method, it is possible to design the time domain resources to carry the reference signal on the first continuous resource and the tail continuous resource.

Step 502: The first device determines the first signal and the first data signal carried on the time domain resource.

In the embodiment of the present application, there are multiple 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 a possible implementation manner, this application provides a manner of combining the first signal and the first data signal on time domain resources. Specifically, design the first signal carried on the time domain resource, and design the first data signal carried on the frequency domain resource, and then convert the first data signal carried on the frequency domain resource into a time domain resource. And then combine the first signal carried on the designed time domain resource with the first data signal carried on the designed time domain resource, so as to determine the first signal carried on the time domain resource and The first data signal.

As an example, the first device may also determine the position occupied by the first data signal on the frequency domain resource, and 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, the first device determines the first data signal carried on the time domain resource according to the first data signal modulated on the frequency domain resource, and according to the first data signal carried on the time domain resource and the first signal in the frequency domain The position occupied on the resource determines the first signal carried on the time domain resource, and then the first device combines the first signal carried on the time domain resource with the first data signal carried on the time domain resource.

In another possible implementation manner, this application provides a manner of combining the first signal and the first data signal on frequency domain resources. Specifically, design the first data signal carried on the frequency domain resource, and design the first signal carried on the time domain resource, and then convert the first signal carried on the time domain resource into the first signal carried on the frequency domain resource. The first signal, after that, the first data signal carried on the frequency domain resource is combined with the first signal carried on the frequency domain resource to obtain the first signal and the first data signal carried on the frequency domain resource, and then 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 sent out.

As an example, the first device may determine the position occupied by the first data signal on the frequency domain resource, and 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, and further , The first device determines the first data signal carried on the time domain resource according to the first data signal modulated on the frequency domain resource, and according to the first data signal carried on the time domain resource and the first signal in the frequency domain resource The position occupied on the upper limit determines the first signal carried on the time domain resource. After that, 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 modulates the first data signal carried on the frequency domain resource according to the modulation, And the first signal carried on the frequency domain resource, the first signal and the first data signal carried on the time domain resource are determined.

Based on the above two implementations, in the embodiment of the application, the first signal (RS+IC) is designed in the time domain structure, and the first data signal is designed in the frequency domain structure, so the first signal and the first data signal If merging is required, 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; or, the data signal carried on the time domain resource can be made The first signal is 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 introduce the method of constructing the first signal (RS+IC) on the frequency domain resource, the construction process will be described below in conjunction with specific embodiments.

In the first step, the time-domain reference signal sequence

Multiply by

Then connect it to the time domain reference signal sequence

After that, the composition length is

the sequence of.

Exemplarily, taking N=15 and Ncp=3 as an example, the sequence obtained in the first step is as follows:

The second step is to insert the first data signal into the k-th subcarrier position in the frequency domain, k∈{0,1,...,N-1} and k mod M≠Δ, and the remaining subcarrier positions are filled with zeros to obtain the frequency domain sequence. Then, the obtained frequency domain sequence is transformed into the time domain to obtain the time domain data signal (d ₀ , d ₁ ,..., d _N-2 , d _N-1 ).

The third step is to add N _cp symbols at the end of the time domain data signal

Multiply by

Then connect it to the header of the time domain data signal

Symbols

After that, the composition length is

the sequence of.

Exemplarily, N=15, Ncp=3, the sequence obtained in the third step is as follows:

The fourth step is to subtract the sequence constructed in the first step from the sequence constructed in the third step to get the length

the sequence of.

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

The fifth step is to multiply the sequence constructed in the fourth step by

M-1 length is

The length of the M-1 obtained in this step is

The sequence of sequentially connected in the fourth step to get the length

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

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

u ₀ -d ₀ , u ₁ -d ₁ ,

among them,

Equal to 1.

The sixth step is to transform the time domain (RS+IC) sequence constructed in the fifth step to the frequency domain, so that the frequency domain (RS+IC) sequence can be obtained.

Of course, if only the time domain (RS+IC) sequence needs to be constructed, it can be implemented through the first to fifth steps. In the embodiment of the present 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 continuous resources at both ends of the time domain resources are all reference signals.

Step 503: The first device sends the first signal and the first data signal on the time domain resource.

In the embodiment of this application, the first reference signal in the reference signal occupies the continuous resource on the first end of the time domain resource, the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource, and the interference cancellation signal It can be used to eliminate the interference of the first data signal to the reference signal, so that there are continuous reference signals at both ends of the time domain resource, so unlike the prior art, the data signal and the reference signal are inserted on the frequency domain resource , And then convert the data signal and reference signal on the frequency domain resource into the data signal and reference signal on the time domain resource, and then amplify and send by the PA, and the data signal and reference signal on the frequency domain resource are transferred to the time domain At this time, there are data signals on the entire time domain resource, so the non-linear characteristics of the PA will cause the data signal to interfere with the reference signal RS, and there is a problem that unknown data signals cause interference to the reference signal and the reference signal cannot be estimated. This application implements For example, the first end of the time domain resource only has a reference signal, and the second end only has a reference signal, so there is no data interference to the reference signal. Since the reference signal is known, even if there are different samples on the first end or the second end The reference signals between the points interfere with each other, and the reference signal can also be estimated, so the crosstalk problem between the data signal and the reference signal caused by the non-linear characteristics of the PA can be eliminated.

Further, before sending the first signal and the first data signal on the time domain resource, the first device may also add a cyclic prefix before the first end of the time domain resource. The cyclic prefix is the same as the second reference signal, and the first device may The cyclic prefix, the first signal and the first data signal are sent on the time domain resource. By adding a cyclic prefix before the first end of the time domain resource, it is possible to resist the effects of inter-carrier interference and multipath delay.

The communication system can include three parts: sending equipment, channel and receiving equipment. Among them, the channel refers to the transmission channel of the signal, which can be understood as the transmission medium of the signal. According to different transmission media, communication systems can be divided into wired communication systems and wireless communication systems. Due to the non-ideal characteristics of the transmission medium, especially for wireless communication systems, signal transmission will always be distorted. In other words, the signal received by the receiving device is not exactly the same as the signal originally sent by the sending 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, estimating the characteristics of the channel helps to offset signal distortion and improve the performance of the communication system. The following description takes the receiving device as the second device as an example. The processing procedure after the second device receives the first signal and the first data signal sent by the sending device.

Based on the foregoing steps 501-503, the foregoing FIG. 5 may further include the following steps:

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 includes a reference signal and an interference cancellation signal, the first reference signal in the reference signal occupies continuous resources on the first end of the time domain resource, and the second reference signal in the reference signal occupies the second end of the time domain resource The interference cancellation signal is used to eliminate the interference of the first data signal on the reference signal.

Exemplarily, the first device sends the first reference signal carried at the first end of the OFDM symbol, the second reference signal carried at the second end of the OFDM symbol, and the first reference signal carried at the middle continuous resource position of the OFDM symbol to the second device. Four signals, and because the signal may be distorted, the second device receives the fourth reference signal corresponding to the first reference signal at the first end of the OFDM symbol, and the second reference signal corresponding to the second reference signal at the second end of the OFDM symbol Fifth reference signal, the fifth signal corresponding to the fourth signal is received at the continuous resource position in the middle of the OFDM symbol.

In step 505, the second device may receive 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 information corresponding to the fourth signal. The fifth signal is demodulated to obtain the estimated value of the first data signal.

In a possible implementation manner, 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 sent by the first device, and the fourth reference signal and the fifth reference signal received, the estimation model can be obtained.

Then, the second device determines the 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 sent by the first device and is in time. The estimated value of the fourth signal carried on the middle continuous resource of the domain resource, the fourth signal including the third data in the first data signal, the third interference cancellation signal in the interference cancellation signal, and the third reference signal in the reference signal.

After that, the second device determines the seventh signal according to the determined sixth signal, the first reference signal, and the second reference signal. The seventh signal is the first signal sent by the first device and carried on the time domain resource. And the estimated value of the first data signal; the second device processes the seventh signal carried on the frequency domain resource according to the seventh signal 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 frequency domain resource; , Demodulate to obtain a third data signal, and the third data signal is an estimated value of the first data signal. In this way, a third data signal that is closer to the first data signal sent by the first device can be obtained.

After the first device sends the first signal and the first data signal, since the signal can be distorted by the nonlinear characteristics of the PA when passing through the PA, the signal received by the second device may not be the first signal and the first signal. A data signal, for example, a fourth reference signal corresponding to a first reference signal is received on a continuous resource on the first end of a time domain resource, and a fourth reference signal corresponding to a second reference signal is received on a continuous resource on the second end The fifth reference signal, and the first reference signal and the second reference signal are known, so the received signal and the transmitted signal can be obtained according to the received fourth reference signal and the fifth reference signal, as well as the first reference signal and the second reference signal The relationship between and the received fifth signal can obtain the estimated value of the first data signal. In this way, the reference signals sent by the sender at the beginning and end of the time domain resource occupy continuous resources. Unlike the prior art, the data signal and reference signal are inserted on the frequency domain resource, and then the data signal and reference on the frequency domain resource are inserted. The signal is converted into the data signal and reference signal on the time domain resource, and then amplified by the PA and sent. When the data signal and reference signal on the frequency domain resource are transferred to the time domain, the data signal exists on the entire time domain resource. Therefore, the non-linear characteristics of the PA will cause the data signal to interfere with the reference signal RS, and there is a problem that the unknown data signal interferes with the reference signal and the reference signal cannot be estimated. The embodiment of the present application has only the reference signal at the first end of the time domain resource. , The second end also only has a reference signal, so there is no data interference to the reference signal. Since the reference signal is known, it can be estimated even if there is mutual interference between reference signals at different sampling points on the first end or the second end After the reference signal is generated, the receiving end can demodulate and obtain an estimated value closer to the first data signal sent by the first device.

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 to obtain the estimation model.

The following describes in detail how to demodulate the estimated value of the first data signal with reference to FIG. 9.

As shown in Figure 9, the pilot sequence in the OFDM symbol sent by the first device (transmitting end) is denoted as y(n), which includes: a cyclic prefix of length N _cp , and a header length of

The pilot sequence and the pilot sequence with the tail length of N _cp . The pilot sequence in the OFDM symbol received by the second device is denoted as x(n), and the position occupied by the pilot sequence included in x(n) in the OFDM symbol corresponds to y(n), that is, the length is N _cp The cyclic prefix and header length are

The pilot sequence and the pilot sequence with the tail length of N _cp . Among them, the sequence included in x(n) and the sequence included in y(n) have a one-to-one correspondence in the position occupied by the OFDM symbol. However, due to the possibility of signal distortion, the sequence included in x(n) and the sequence included in y(n) The sequence may be different. So you can use x(n) as a sample and y(n) as a label to input to the neural network to obtain neural network parameters, thereby obtaining an estimated model. The estimated model can reflect the signal sent by the first device and the signal actually received by the second device. Correspondence of signals.

The second device (receiving end) received the sequence carried in the middle continuous resource position in the OFDM symbol

Known, so the sequence

Input to the estimation model to get the sequence to be estimated

Sequence to be estimated

That is, the estimated value of the fourth signal, and then the estimated value of the first data signal is derived according to the foregoing embodiment.

It should be understood that the above-mentioned pilot sequence is the reference signal. If the cyclic prefix is not included in the signal sent by the first device, then y(n) includes: the length of the header is

The pilot sequence and the pilot sequence with the tail length of N _cp . Correspondingly, x(n) corresponds to x(n), and the cyclic prefix is not included.

Optionally, the neural network can be the ESN. The following describes the process of training the ESN with specific examples.

Refer to FIG. 10, which is a system schematic diagram of a MIMO-OFDM receiver of an ESN network provided by an embodiment of this application.

As shown in Figure 10, the ESN network includes an input layer, a storage layer, and an output layer. The number of input ports of the ESN network is 2N _r , the number of output ports is 2N _t , and the input matrix

Pool matrix

Output matrix

Feedback matrix

N _neu is the number of storage nodes in the ESN network, N _r is the number of receiving antennas, and N _t is the number of transmitting antennas.

The training process of the ESN network is as follows:

In the first step, W ⁱⁿ , W and W ^{fb are} randomly generated, and then W ⁱⁿ , W and W ^fb remain unchanged.

The second step is to input the label y(n) and sample x(n) into the ESN network.

First, initialize the state C to zero, that is, C(0)=0.

Secondly, use the sample x(n), label y(n) and the state update formula to update the state to obtain a series of C values, where the state update formula is:

C(n+1)=f(W ⁱⁿ x(n+1)+WC(n)+W ^fb y(n)).

Where n=N ₁ , N ₁ +1,..., N _K , N ₁ and N _K are both integers, and N _K ≥ N ₁ .

Taking n=0,...,n _max as an example, the number of training samples is n _max +1. The first n ₀ training samples are used for state cleaning, that is, the first n ₀ states C and the corresponding input x(n) and label y(n) are discarded.

For example, assuming n ₀ =9 and n _max =100, then discard C(0), C(1),..., C(9), and keep C(10), C(11)..., C( 100), x(10), x(11)..., x(100), y(10), y(11)..., y(100),

The matrix S is formed by the samples x(n), n=n ₀ ,...,n _max and the state C(n), n=n ₀ ,...,n _max .

In an example, n=n ₀ ,..., n _max , the input data x(n) and the state data C(n) are combined into row vectors, and these row vectors are stacked vertically into a matrix S, so the scale of the matrix S is ( n _max -n ₀ +1)×(N _neu +2N _r ), for example,

Then, a matrix T is formed by the labels y(n), n=n ₀ ,..., n _max . For each n=n ₀ ,..., n _max , the label data y(n) is passed a (f ^out )-1, (f ^0ut )-1 is the inverse function of f ^out , and the matrix T is stacked in the vertical direction. The scale of T is (n _max -n ₀ +1)×2N _t .

E.g,

The third step is to use the linear regression method to calculate the output matrix W ^out from the matrix S and the matrix T. Specifically, the pseudo-inverse of the matrix S is multiplied by the matrix T to obtain a matrix with a scale of (N _neu +2N _r )×2N _t (W ^out ) ^T , that is, (W ^out ) ^T =S ⁺ T. Wherein, the matrix S is composed of samples x(n), n=N ₁ , N ₁ +1,..., N _K and states C(n), n=N ₁ , N ₁ +1,..., N _K ; The matrix T is composed of labels y(n), n=N ₁ , N ₁ +1,..., N _K.

The output matrix W ^out is obtained through the above process, and then the first signal and the first data signal carried on the time domain resource are estimated according to W ^out . For details, see the following reasoning process:

The first step is to initialize state C as the last state of the training phase.

In the second step, the time domain estimation signal is generated according to the following formula:

Among them, f ^out is the activation function.

Since the ESN network is good at solving nonlinear problems, the use of ESN network for channel estimation can eliminate the nonlinear impact of PA. Moreover, the ESN network has memory, that is, the current output depends not only on the current input, but also on the historical input, so the ESN network can Process and effectively use multipath information.

Based on the same inventive concept as the foregoing method embodiment, referring to FIG. 11, a schematic structural diagram of an apparatus provided by an embodiment of this application may include a transceiver unit 1101 and a processing unit 1102.

In a possible implementation manner, the device may be applied to the device of the sender, and the transceiver unit 1101 may be used to send the first signal and the first data signal to other devices. Exemplarily, the transceiver unit 1101 performs step 303. The processing unit 1102 may be used to determine the time domain resources occupied by the first signal and the first data signal. The specific processing unit 1102 may be used to implement the functions performed by the first device in the foregoing method embodiment.

In a possible implementation manner, the device can be used in the receiver's device, the transceiver unit 1101, to receive the first signal and the first data signal sent from other devices. Exemplarily, the transceiver unit 1101 may be used to perform step 504. The processing unit 1102 may be used to demodulate the signal sent by the transmitting end according to the received signal. For example, the processing unit 1102 is used to perform step 505. The specific processing unit 1102 may be used to implement the functions performed by the second device in the foregoing method embodiments.

FIG. 12 is a schematic structural diagram of a network device provided by an embodiment of the present application, such as 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 to perform the functions of the network device (or 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 (BBU) (also referred to as digital units, digital units, DU) 1220. The RRU 1210 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1211 and a radio frequency unit 1212. The RRU 1210 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending the reference signals described in the foregoing embodiments to terminal equipment. The BBU1220 part is mainly used for baseband processing, control of base stations, and so on. The RRU 1210 and the BBU 1220 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 1220 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete 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 execute the operation procedure of the network device (or base station) in the foregoing method embodiment.

In an example, the BBU 1220 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network (such as an LTE network or a 5G network) with a single access indication, or may support different access networks respectively. Access standard wireless access network (such as LTE network, 5G network or other network). The BBU 1220 also includes a memory 1221 and a processor 1222, and the memory 1221 is used to store necessary instructions and data. The processor 1222 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device (or the base station) in the foregoing method embodiment. The memory 1221 and the processor 1222 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

FIG. 13 shows a schematic structural diagram of a communication device 1300. The communication device 1300 may be used to implement the method executed by the first device or the second device described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment. The communication device 1300 may be a chip, a network device (such as a base station), a terminal device, and the like.

The communication device 1300 includes one or more processors 1301. The processor 1301 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process data in software programs. The communication device may include a transceiving unit to implement signal input (reception) and output (transmission). For example, the communication device may be a chip, and the transceiver unit may be an input and/or output circuit of the chip, or a communication interface. The chip can be used in a terminal or a base station or other network equipment. For 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 device 1300 includes one or more processors 1301, and the one or more processors 1301 can implement the method executed by the first device or the second device in the embodiment shown in FIG. 5.

In a possible design, the communication device 1300 includes means for generating reference signals and means for sending reference signals. The functions of the means for generating the reference signal and the means for sending the reference signal may be realized by one or more processors. For example, the reference signal may be generated by one or more processors, and the reference signal may be transmitted through a transceiver, or an input/output circuit, or an interface of a chip. For the reference signal, refer to the related description in the foregoing method embodiment.

In a possible design, the communication device 1300 includes means for receiving reference signals. For example, the reference signal may be received through a transceiver, or an input/output circuit, or an interface of a chip.

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

Optionally, in a design, the processor 1301 may execute instructions to make the communication apparatus 1300 execute the method executed by the first device or the second device described in the foregoing method embodiments. The instructions may be stored in whole or in part in the processor, such as instruction 1303, or may be stored in whole or in part in the memory 1302 coupled with the processor, such as instruction 1304, or through

instructions

1303 and 1304. The communication device 1300 executes the method described in the foregoing method embodiment.

In another possible design, the communication device 1300 may also include a circuit, and the circuit may implement the function of the first device or the second device in the foregoing method embodiment.

In another possible design, the communication device 1300 may include one or more memories 1302, on which instructions 1304 are stored, and the instructions may be executed on the processor, so that the communication device 1300 executes The method described in the above method embodiment. Optionally, data may also be stored in the memory. The optional processor may also store instructions and/or data. For example, the one or more memories 1302 may store various data described in the above embodiments. The processor and memory can be provided separately or integrated together.

In another possible design, the communication device 1300 may further include a transceiver unit 1305 and an antenna 1306. The processor 1301 may be called a processing unit, and controls a communication device (terminal or base station). The transceiver unit 1305 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device through the antenna 1306.

The present application also provides a communication system, which includes the aforementioned first device and second device, where the first device may 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 equipment.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

The embodiment of the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the communication method described in any of the foregoing method embodiments is implemented.

The embodiments of the present application also provide a computer program product, which, when executed by a computer, implements the communication method described in any of the foregoing method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.

It should be understood that the foregoing processing device may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, At this time, the processor may be a general-purpose processor, which is implemented by reading the software code stored in the memory, and the memory may be integrated in the processor, may be located outside the processor, and exist independently.

It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "in one embodiment" or "in an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation. In addition, the terms "system" and "network" in this article are often used interchangeably in this article.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

Through the description of the foregoing implementation manners, those skilled in the art can clearly understand that this application can be implemented by hardware, firmware, or a combination thereof. When implemented by software, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures The desired program code and any other medium that can be accessed by the computer. In addition. Any connection can suitably become a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , Fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless and microwave are included in the fixing of the media. As used in this application, Disk and disc include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs. Disks usually copy data magnetically, while discs The laser is used to optically copy data. The above combination should also be included in the protection scope of the computer-readable medium.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A communication method, characterized in that it comprises:

The first device determines the time domain resources occupied by the first signal and the data signal, the first signal includes a reference signal and an interference cancellation signal, and the first reference signal in the reference signal occupies the first end of the time domain resource A continuous resource in the reference signal, a second reference signal in the reference signal occupies a continuous resource on the second end of the time domain resource, and the interference cancellation signal is used to eliminate the interference of the data signal to the reference signal;

Determining, by the first device, the first signal and data signal carried on the time domain resource;

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

Determining, by the first device, the position occupied by the data signal on the frequency domain resource;

The first device modulates the data signal onto 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:

Determining, by the first device, 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. signal;

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 according to claim 2, wherein the first device determines according to the data signal carried on the time domain resource and the position occupied by the first signal on the frequency domain resource After the first signal carried on the time domain resource, the method further includes:

Determining, by the first device, the first signal carried on the frequency domain resource according to the first signal carried on the time domain resource;

The first device determines the first signal borne on the time domain resource based on the data signal borne on the frequency domain resource and the first signal borne on the frequency domain resource. A signal and the data signal.
The method according to claim 2 or 3, wherein the frequency domain resources include N subcarriers, and the first signal occupies the tth subcarrier among the N subcarriers, and t∈{0,1, …, N-1} and t mod M=Δ, the data signal occupies the k-th sub-carrier among the N sub-carriers, 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 according to any one of claims 1 to 3, wherein the continuous resource on the first end of the time domain resource carries a second signal and the first data in the data signal, and the first data The second signal includes the first reference signal and the first interference cancellation signal in the interference cancellation signal, and the first interference cancellation signal cancels the first data;

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

For any m∈{1,2,...,M-2,M-1}, satisfy:

The w i is a signal carried by the i-th resource in the time domain resource, and the i is an integer between 0 and N-1, and the M and N are both integers greater than 1.
7. The method according to any one of claims 1-7, wherein before the first device sends the first signal and the data signal on the time domain resource, the method further comprises:

Adding, by the first device, a cyclic prefix before the first end of the time domain resource, the cyclic prefix is the same as the second reference signal;

The sending, by the first device, the first signal and the data signal on the time domain resource includes:

The first device sends the cyclic prefix, the first signal, and the data signal on the time domain resource.
A communication method, characterized in that it comprises:

The second device receives the first signal and the first data signal sent by the first device on time domain resources, where the first signal includes a reference signal and an interference cancellation signal, and the first reference signal in the reference signal occupies the time The continuous resource on the first end of the domain resource, the second reference signal in the reference signal occupies the continuous resource on the second end of the time domain resource, and the interference cancellation signal is used to cancel the first data signal Interference to the reference signal;

The second device 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, The fifth signal corresponding to the fourth signal is demodulated to obtain the estimated value of the first data signal.
The method according to claim 9, wherein the continuous resource on the first end of the time domain resource carries a second signal and the first data in the first data signal, and the second signal Comprising a first interference cancellation signal in the first reference signal and the interference cancellation signal, and the first interference cancellation signal is canceled with the first data;

The continuous resource on the second end of the time domain resource carries a third signal and the second data in the first data signal, and the third signal includes the second reference signal and the interference cancellation signal The second interference cancellation signal in the second interference cancellation signal cancels the second data.
The method according to claim 10, wherein the middle continuous resource of the time domain resource carries a fourth signal, and the fourth signal includes the third data in the first data signal, and the interference cancellation The third interference cancellation signal in the signal and the third reference signal in the reference signal, wherein the intermediate continuous resource is the continuous resource except the first end and the continuous resource except the second end in the time domain resources Resources other than continuous resources.
The method according to claim 11, wherein the time domain resources are divided into M resources, and the first signal carried in the M resources meets the following relationship:

For any m∈{1,2,…,M-2,M-1}, satisfy

The w i is a signal carried by the i-th resource in the time domain resource, and the i is an integer between 0 and N-1, and the M and N are both integers greater than 1.
The method according to any one of claims 9-12, wherein the second device is based on the first reference signal, the second reference signal, and the received first reference signal corresponding to the first reference signal. Four reference signals, a fifth reference signal corresponding to the second reference signal, and a fifth signal corresponding to the fourth signal, demodulating to obtain an estimated value of the first data signal, including:

Determining, by the second device, 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 device determines the 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 The estimated value of the fourth signal sent by the first device and carried on the middle continuous resource of the time domain resource; the fourth signal includes the third data in the first data signal, the 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, where the seventh signal is sent by the first device Estimated values of the first signal and the first data signal 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;

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

The second device trains a neural network model according to the fourth reference signal and the first reference signal, and 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 communication device, characterized by comprising:

transceiver,

At least one processor; and,

A memory communicatively connected with the at least one processor; wherein,

The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the method according to any one of claims 1 to 8 , Or, execute the method described in any one of claims 9 to 15.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the The method described in any one of claims 1 to 8, or the method described in any one of claims 9 to 15 is executed.