WO2024061255A1

WO2024061255A1 - Signal sending method, signal receiving method, and device

Info

Publication number: WO2024061255A1
Application number: PCT/CN2023/119918
Authority: WO
Inventors: 袁璞; 刘昊
Original assignee: 维沃移动通信有限公司
Priority date: 2022-09-21
Filing date: 2023-09-20
Publication date: 2024-03-28
Also published as: CN117792590A

Abstract

The present application relates to the technical field of communications, and discloses a signal sending method, a signal receiving method, and a device. The signal sending method in embodiments of the present application comprises: a sending device transforms a pilot block of a Delay-Doppler domain to a pilot block of a time-frequency domain, the pilot block of the Delay-Doppler domain comprising at least one pilot symbol mapped to a delay-Doppler domain resource element (DRE); the sending device adds the pilot block of the time-frequency domain to a data block of the time-frequency domain, the data block comprising at least one data symbol; and the sending device sends a target signal to a receiving device on the basis of a signal obtained after addition.

Description

Signal sending method, signal receiving method and equipment

Cross-references to related applications

This application claims priority to Chinese patent application No. 202211154019.2 filed in China on September 21, 2022, the entire contents of which are incorporated herein by reference.

Technical field

This application belongs to the field of communication technology, and specifically relates to a signal sending method, a signal receiving method and equipment.

Background technique

The communication channel is usually a time-varying multipath fading channel. Currently, the Orthogonal Time Frequency Space (OTFS) technology is usually used to resist the time-varying characteristics, multipath characteristics and fading characteristics of the communication channel to improve the transmitting end. The quality of signal transmission through the communication channel between the receiving end and the receiving end.

In related technology, the transmitting end of the OTFS system can map the pilot symbols in the information frame to the Delay-Doppler domain resource element (DRE) in the Delay-Doppler domain resource grid. The OFDM-based OTFS system is shown in Figure 1. The demodulation of this system is relatively complex.

Contents of the invention

Embodiments of the present application provide a signal sending method, a signal receiving method and a device, which can solve the relatively complex problem of demodulation at the receiving end.

The first aspect provides a signal sending method, including:

The sending device converts the pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one pilot mapped to the delayed Doppler domain resource element DRE. symbol;

The sending device adds the pilot block in the time-frequency domain and the data block in the time-frequency domain; the data block includes at least one data symbol;

The sending device sends the target signal to the receiving device based on the added signal.

In the second aspect, a signal receiving method is provided, including:

The receiving device receives a target signal sent by the sending device; the target signal is obtained by adding a pilot block based on the time-frequency domain and a data block in the time-frequency domain, and the pilot block in the time-frequency domain is obtained by transforming a pilot block in the delayed Doppler domain; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to a delayed Doppler domain resource element DRE; the data block includes at least one data symbol;

The receiving device performs detection processing based on the target signal.

In a third aspect, a signal sending device is provided, including:

A processing module configured to transform a pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one mapped to a delayed Doppler domain resource element DRE. pilot symbols;

Add the pilot block in the time-frequency domain and the data block in the time-frequency domain; the data block includes at least one data symbol;

The sending module is used to send the target signal to the receiving device based on the added signal.

In a fourth aspect, a signal receiving device is provided, including:

The receiving module is used to receive the target signal sent by the transmitting device; the target signal is obtained by adding a pilot block based on the time-frequency domain and a data block based on the time-frequency domain. The pilot block in the time-frequency domain is a delay The pilot block in the Doppler domain is transformed; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE; the data block includes at least one data symbol;

A processing module, configured to perform detection processing based on the target signal.

In a fifth aspect, a sending device is provided. The sending device includes a processor and a memory. The memory stores a program or instructions that can be run on the processor. The program or instructions are implemented when executed by the processor. The steps of the method as described in the first aspect.

In a sixth aspect, a sending device is provided, including a processor and a communication interface, wherein the processor is configured to transform a pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the delayed Doppler domain The pilot block includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE; the pilot block in the time-frequency domain is added to the data block in the time-frequency domain; the data block includes at least one Data symbols; the communication interface is used to send a target signal to the receiving device based on the added signal.

In a seventh aspect, a receiving device is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

In an eighth aspect, a receiving device is provided, including a processor and a communication interface, wherein the communication interface is used to receive a target signal sent by the sending device; the target signal is a pilot block based on the time-frequency domain and a time-frequency The pilot block in the time-frequency domain is obtained by adding the data blocks in the delayed Doppler domain; the pilot block in the delayed Doppler domain includes at least one mapped to the delayed Doppler domain. Pilot symbols on Doppler domain resource elements DRE; the data block includes at least one data symbol; and the processor is configured to perform detection processing based on the target signal.

A ninth aspect provides a communication system, including: a sending device and a receiving device. The sending device can be used to perform the steps of the signal sending method as described in the first aspect. The receiving device can be used to perform the steps of the signal sending method as described in the second aspect. The steps of the signal receiving method.

In a tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the signal sending method as described in the first aspect are implemented, or accomplish The steps of the signal receiving method described in the second aspect.

In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. The steps of the signal sending method, or the steps of implementing the signal receiving method as described in the second aspect.

In a twelfth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect The steps of the signal sending method or the signal receiving method described in the second aspect.

In this embodiment of the present application, a pilot block in the delayed Doppler domain is transformed into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one mapped to a delayed Doppler domain resource element DRE. pilot symbols; add the pilot block in the time-frequency domain and the data block in the time-frequency domain; then transmit the signal. Since the pilot block and data block are multiplexed into the time-frequency domain, the receiving end can use it when demodulating OFDM demodulates symbol by symbol, the demodulation complexity is low, and because the pilot blocks in the time-frequency domain are added to the data blocks in the time-frequency domain, that is, the pilot symbols and data symbols are superimposed, the pilot overhead is small.

Description of the drawings

Figure 1 is a block diagram of an OTFS system;

Figure 2 is a structural diagram of a wireless communication system applicable to the embodiment of the present application;

Figure 3 is a schematic diagram of the OTFS principle provided by the embodiment of this application;

Figure 4 is a schematic flowchart of a signal sending method provided by an embodiment of the present application;

FIG5 is one of the system block diagrams of the signal sending method provided in an embodiment of the present application;

Figure 6 is one of the pilot mapping schematic diagrams provided by the embodiment of the present application;

Figure 7 is the second system block diagram of the signal sending method provided by the embodiment of the present application;

FIG8 is a schematic diagram of a flow chart of a signal receiving method provided in an embodiment of the present application;

Figure 9 is a schematic structural diagram of a signal sending device provided by an embodiment of the present application;

Figure 10 is a schematic structural diagram of a signal receiving device provided by an embodiment of the present application;

FIG11 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

Figure 12 is a schematic structural diagram of a terminal provided by an embodiment of the present application;

Figure 13 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

FIG. 2 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle-mounted equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service Terminal devices such as mobile phones, wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), Smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit. Access network equipment may include base stations, WLAN access points or WiFi nodes, etc. The base station may be called Node B, Evolved Node B (eNB), access point, Base Transceiver Station (BTS), radio base station , radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Use B node, home evolved B node, transmission and reception point (Transmission Reception Point, TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms and needs to be explained. It should be noted that in the embodiment of this application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited. The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of this application, only the core network equipment in the NR system is used as an example for introduction, and the specific type of the core network equipment is not limited.

First, the relevant concepts involved in the embodiments of this application are introduced:

OTFS modulation technology logically maps the information in a data packet of size M×N, such as Quadrature Amplitude Modulation (QAM) symbols, to an M×N resource grid in the two-dimensional delay Doppler domain, that is, the pulse in each resource grid modulates a QAM symbol in the data packet. Further, by designing a set of orthogonal two-dimensional basis functions, the data set in the M×N delay Doppler domain is transformed to the N×M time-frequency domain plane. This transformation is mathematically called Inverse Symplectic Fourier Transform (ISFFT). Correspondingly, the transformation from the time-frequency domain to the delay Doppler domain is called Symplectic Fourier Transform. The physical meaning behind it is that the delay and Doppler effect of the signal is actually a linear superposition effect of a series of echoes with different time and frequency offsets after the signal passes through a multipath channel. In this sense, delay Doppler analysis and time-frequency domain analysis can be obtained by converting the ISSFT and SSFT mentioned above.

The OFDM-based OTFS system is implemented by adding a precoder on the transmitting side of the OFDM system, in which ISFFT is used to convert the transmitted signal x[k,l] from the delayed Doppler domain to the time-frequency domain. Then use the transceiver process of the OFDM system to obtain the received signal Y[m,n] in the time-frequency domain, which is input to the decoder added on the receiving side, where SFFT is used to calculate the received signal y[k, l]. Then, channel estimation and equalization processing in the delayed Doppler domain are performed on y[k,l] to obtain an estimate of the transmitted signal. The process is shown in Figure 1. Pass Through the ISSFT and SSFT transforms in Figure 1, the conversion relationship between the delayed Doppler domain and the time-frequency domain where the OTFS data is located is shown in Figure 3.

As a result, OTFS technology transforms the time-varying multipath channel into a time-invariant two-dimensional delayed Doppler domain channel (within a certain duration), thus directly reflecting the relative reflection between the transceivers in the wireless link. Geometry of the location causes channel delay Doppler response characteristics. This has three advantages:

1) Invariance of channel coupling state. Since the delay and Doppler of the signal reflect the direct effect of the reflector in the physical channel and only depend on the relative speed and position of the reflector, on the time scale of the wireless frame, the delay and Doppler response of the signal can be regarded as is unchanged.

2) Separability of channel coupling state. In the channel frequency response in the delay-Doppler domain, all diversity paths are reflected as a single impulse response and are completely separable. The QAM symbol traverses all these diversity paths.

3) Orthogonality of channel coupling state. When the resolution of the waveform design is sufficient, it can be considered that the channel impulse response in the delayed Doppler domain is limited to one delayed Doppler domain resource element. Therefore, there is no delay or Doppler dimension Dopp in theory at the receiving end. Interference (inter delay/Doppler interference, IDI).

Due to the above characteristics, delayed Doppler domain analysis eliminates the difficulty of tracking time-varying fading characteristics in traditional time-frequency domain analysis. Instead, it extracts all diversity characteristics of the time-frequency domain channel by analyzing the time-invariant delayed Doppler channel. Then, the time-frequency domain channel can be calculated using the conversion relationship between the delay Doppler domain and the time-frequency domain, which can be well coupled with various existing time-frequency domain signal processing technologies.

In this embodiment of the present application, the sending device may be the terminal or network side device shown in Figure 2, and the receiving device may also be the terminal or network side device shown in Figure 2. For example, in the case where the sending device is the terminal shown in FIG. 2 , the receiving device may be the network side device shown in FIG. 2 . For example, in the case where the sending device is the network side device shown in Figure 2, the receiving device can be the terminal shown in Figure 2.

The signal transmission method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

FIG. 4 is one of the schematic flow charts of the signal sending method provided by the embodiment of the present application. As shown in Figure 4, the signal sending method provided by the embodiment of the present application includes:

Step 101. Convert the pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to a delayed Doppler domain resource element DRE. ;

Specifically, as shown in Figure 5, X _p [k, l] represents a pilot block in the delayed Doppler domain, and X _p [k, l] is transformed into a pilot block X _p [n, m] in the time-frequency domain. ], for example, after precoding processing, such as ISFFT; as shown in Figure 6, the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE.

Step 102: Add the pilot block in the time-frequency domain and the data block in the time-frequency domain;

Specifically, as shown in FIG5 , the pilot block in the time-frequency domain is added to the data block in the time-frequency domain, for example, symbol by symbol, that is, superimposed and placed on each resource element RE.

Step 103: The sending device sends the target signal to the receiving device based on the added signal.

Specifically, the added signal can be modulated and then sent, such as OFDM modulation.

Optionally, as shown in Figure 7, before step 102, it also includes:

The sending device performs scrambling processing on the pilot block in the time-frequency domain and the data block in the time-frequency domain using a scrambling sequence respectively.

Optionally, the scrambling process is a scrambling process for modulation symbols.

Optionally, in order to randomize interference, different scrambling sequences are used for pilot blocks and data blocks.

Specifically, the time-frequency domain signals X _p [n,m] and X _d [n,m] on the transmitting side are scrambled using _Sp [n,m] and S _d [n,m] respectively, so as to Randomizes interference between data and pilot to improve signal detection performance. Correspondingly, on the receiving side, corresponding descrambling operations need to be performed to recover. The scrambling here is scrambling the modulation symbol or the transformed symbol of the modulation symbol, so it is symbol-level scrambling. The scrambling sequence used can be a Zadoff-Chu sequence or a pseudo noise sequence. X _p [n,m] and X _d [n,m] are scrambled column by column by the selected sequence. The scrambling sequences used for X _p [n,m] and X _d [n,m] are different.

Optionally, the scrambling sequence includes at least one of the following:

Zadoff-Chu sequence, pseudo noise PN sequence.

In the above embodiment, pilot symbols and data symbols are scrambled to randomize interference signals, reduce inter-symbol interference and jitter, and facilitate detection at the receiving end.

Optionally, the transmission power of the pilot block is greater than the transmission power of the data block.

Specifically, power allocation is performed on pilot and data signals in the time-frequency domain. That is, different powers Q _p and Q _d are allocated to X _p [n,m] and X _d [n,m]. Usually, Q _p >Q _d is set. First, for sensing, pilots with larger power can ensure sensing performance. For communications, pilots with higher power can better estimate channel coefficients, which is beneficial to interference elimination during symbol detection and is also helpful for improving communication performance.

Optionally, the pilot block has two-dimensional autocorrelation characteristics.

For example, the matrix C represents the pilot block, and the matrix correlation operation between C and C _{[q, p]} is performed. Assume that the matrix is obtained by performing Kronecker product operation or vector product based on multiple vectors:

Represents the Kronecker product operation.

In the derivation of the above equation, we used It is the conclusion of scalars and properties such as Kronecker mixture products. For finding the correlation peak of a two-dimensional autocorrelation sequence, the general focus is on the autocorrelation matrix. The cumulative power of , which is the sum of all its diagonal elements. hypothesis Use the conclusion here:

where ⊙ represents the matrix dot product.

It can be seen from the above results that the cumulative power of the autocorrelation matrix of the designed pilot block C is 1 only when q=0, p=0. In other cases, that is, when the rows or/and columns have cyclic displacements , the accumulated power values of its autocorrelation matrix are very small, so it has excellent two-dimensional autocorrelation characteristics, which facilitates detection at the receiving end and results in better detection performance.

In the method of this embodiment, since the pilot block has two-dimensional autocorrelation characteristics, it has an obvious correlation peak during detection at the receiving end, which facilitates detection at the receiving end and has better detection performance.

Among them, Kronecker product and vector multiplication are equivalent; if vector a is a row vector and vector b is a column vector, the pilot block is the Kronecker product of vectors a and b; if vector a is a column vector Vector, vector b is a row vector, and the pilot block is the vector multiplication of vectors a and b.

Optionally, the sending device generates a pilot block with two-dimensional autocorrelation characteristics based on at least two autocorrelation sequences.

Without loss of generality, assume that a=[a ₁ ,a ₂ ,…,a _Q ], b=[b ₁ ,b ₂ ,…,b _P ] ^T are two known sequences with good autocorrelation characteristics, then :

Among them, (·) ^T represents transposition, (·) _[i] represents vector circular displacement i bit, and ε _q ＜＜1, ζ _p ＜＜1.

Among them (·) _[i,j] means that the matrix is cyclically shifted by i bits in the row direction and j bits in the column direction. Represents the Kronecker product operation.

Perform matrix correlation operations on C and C _[q,p] :

From the above results, it can be seen that the cumulative power of the autocorrelation matrix of the designed pilot block C is 1 only when q=0, p=0. In other cases, that is, when the rows and/or columns have cyclic shifts, the values of the cumulative power of the autocorrelation matrix are very small. Therefore, it has excellent two-dimensional autocorrelation characteristics, which is convenient for detection at the receiving end, resulting in better detection performance.

If the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, the sending device may multiply the Kronecker product or vector of the first autocorrelation sequence and the second autocorrelation sequence as the pilot block. .

The following is the process of constructing the pilot block:

1. Generate the first autocorrelation sequence of length L with good autocorrelation.

2. Generate a second autocorrelation sequence of length K with good autocorrelation.

3. Structure in Represents Kronecker Product (Kronecker Product), vs represents vector multiplication,

In the embodiment of the present application, since both the first autocorrelation sequence and the second autocorrelation sequence are sequences with autocorrelation and have obvious correlation peaks when detected by the receiving end, the obtained pilot block is convenient for the receiving end to perform Detection, detection performance is better.

Optionally, the first autocorrelation sequence and the second autocorrelation sequence may be the same autocorrelation sequence, or they may be different autocorrelation sequences, which is not limited in the embodiments of the present application.

Optionally, the first autocorrelation sequence has a cyclic prefix.

Optionally, the second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.

For example, For the first autocorrelation sequence, add a cyclic prefix of length L _cp to s to get

For example, For the second autocorrelation sequence, add a cyclic prefix of length K _cp and/or a cyclic suffix of K _cs to v, and get

If the first autocorrelation sequence has a cyclic prefix and the second autocorrelation sequence has a cyclic prefix and a cyclic suffix, then the pilot block

Optionally, pilot sequences formed by pilot symbols of delayed dimensions in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic suffixes.

That is, assuming that the pilot block is a two-dimensional matrix, the rows of the matrix represent the Doppler dimension, and the columns of the matrix represent the delay dimension. Each column of pilot symbols in the delay dimension forms a pilot sequence, and each row of pilot symbols in the Doppler dimension The symbols all form a pilot sequence.

In fact, the cyclic prefix/cyclic suffix can also be added after the pilot block is obtained, and the effect is equivalent.

Optionally, when L _cp is not added before step 3, i.e. When , you can add a cyclic prefix of length L _cp to S column by column, and get

Optionally, when K _cp is not added before step 3, i.e. When , you can add a cyclic prefix of length K _cp to S line by line, and get

Optionally, when K _cp and K _cs are not added before step 3, i.e. , you can perform the following steps:

(1) Add a cyclic prefix of length K _cp to S row by row, and get

(2) Add cyclic suffixes of length K _cs to S row by row, and we get

(3) Add a cyclic prefix of length K _cp and a cyclic suffix of length K _cs to S line by line at the same time, and get

Alternatively, when K _cp =L _cp =L _cs =0, that is , you can perform the following steps:

(1) Add a cyclic prefix of length L _cp to S column by column, and get

(2) Add a cyclic prefix of length K _cp to S line by line, and get

(3) Add a cyclic suffix of length K _cs to S line by line, and get

(4)(1)+(2), we get

(5)(1)+(3), we get

(6)(2)+(3), we get

(7)(1)+(2)+(3), we get

In the above embodiment, by setting the cyclic prefix and/or cyclic suffix to the autocorrelation sequence, the detection performance is better.

Optionally, the first autocorrelation sequence and/or the second autocorrelation sequence includes at least one of the following:

ZC sequence, Constant Amplitude Zero Auto Correlation (CAZAC) sequence, maximum length sequence, Barker code, Low Ambiguity Zone (LAZ) code, Zero Ambiguity Zone (ZAZ) code, Gold sequence, Kasami code, JPL sequence, Walsh-Hadamard code.

In the above embodiment, the pilot block is constructed by the Kronecker product or vector multiplication of the first autocorrelation sequence and the second autocorrelation sequence. Since both the first autocorrelation sequence and the second autocorrelation sequence have autocorrelation, The sequence has obvious correlation peaks when detected by the receiving end, so it is easy for the receiving end to detect and the detection performance is good.

Optionally, any pilot symbol Xp[ _k ,l] in the pilot block _satisfies in the delay dimension: _lp - _l1≤l≤lp + _l2 , and in the Doppler dimension: _kp - _k1≤k≤kp + _k2 ; wherein k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, ( _kp , _lp ) are the coordinates of the reference point in the pilot block in the Doppler dimension and the delay dimension; _l1 , _l2 _, _k1 and _k2 are integers greater than or equal to 0.

The length of the pilot block in the delay dimension is M _p =l ₁ +l ₂ +1 ≤ M, and the length of the pilot block in the Doppler dimension is N _p =k ₁ +k ₂ +1 ≤ N; The M is the length of the delayed Doppler domain resource grid in the delay dimension; the N is the length of the delayed Doppler domain resource grid in the delay dimension.

Specifically _, , N is the length of the delayed Doppler domain resource grid in the Doppler dimension, that is, the number of DREs included, where (l _p ,k _p ) is the reference point coordinates within the pilot block, usually set to the center of the pilot block point. For example, take The mapping of the pilot block mapping method described by the above formula in the delayed Doppler domain is shown in Figure 6.

Optionally, the pilot block contains a cyclic prefix of delay dimension, and the pilot block satisfies the following delay conditions:

l _cp represents the length of the pilot sequence formed by the pilot symbols of the delay dimension in the pilot block or the cyclic prefix of the first autocorrelation sequence.

Optionally, the pilot block contains the cyclic prefix and cyclic suffix of the Doppler dimension, and the pilot block satisfies the following Doppler conditions:

k _cp represents the pilot sequence formed by the Doppler dimension pilot symbols in the pilot block or the length of the cyclic prefix of the second autocorrelation sequence, k _cs represents the pilot sequence formed by the Doppler dimension pilot symbols in the pilot block The length of the cyclic suffix of the pilot sequence or the second autocorrelation sequence.

Specifically, it is assumed that the length of the pilot block in the delay dimension is M _p , that is, the number of DREs included; the length in the Doppler dimension is N _p , that is, the number of DREs included; the maximum delay and maximum positive and negative Doppler of the channel respectively Optionally, as shown in Figure 6, when M _p <M and N _p <M, a cyclic prefix and a suffix can also be added to the pilot block to reduce the probability of false detection by increasing overhead. Pick and are the cyclic prefix and cyclic suffix of the Doppler domain, is the cyclic prefix of the delay domain, the value of the pilot mapping parameter needs to meet the following conditions:

In the above embodiment, by adding the cyclic prefix CP in the delay dimension, the cyclic prefix CP and the cyclic suffix CS in the Doppler dimension, the accuracy of the sensing measurement on the receiving side can be improved, and the detection performance is improved.

In the scheme of the embodiment of the present application, the pilot block in the delayed Doppler domain is used to realize the multiplexing of the perception function and the channel estimation function, avoiding the additional perception pilot overhead. When realizing the communication function, the data is multiplexed in the time-frequency domain to make full use of the low complexity of OFDM symbol-by-symbol demodulation, while making little change to the existing protocol. At the same time, since the pilot signal in the delayed Doppler domain is transformed to the time-frequency domain and superimposed with the data symbols in the time-frequency domain, the pilot overhead is also reduced compared to the design of pilot plus guard interval, and the peak-to-average power ratio (PAPR) problem caused by high-power pilot is avoided.

Figure 8 is a schematic flowchart of a signal receiving method provided by an embodiment of the present application. As shown in Figure 8, the signal receiving method provided by the embodiment of the present application includes:

Step 201: A receiving device receives a target signal sent by a sending device; the target signal is obtained by adding a pilot block based on a time-frequency domain and a data block in a time-frequency domain, and the pilot block in the time-frequency domain is obtained by transforming a pilot block in a delayed Doppler domain; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to a delayed Doppler domain resource element DRE; and the data block includes at least one data symbol;

Step 202: The receiving device performs detection processing based on the target signal.

The detection principle of the receiving end is shown in Figure 5 and Figure 7. As shown in Figure 5, for sensing processing, for example, the receiving end performs demodulation and SFFT in sequence, transforms to the Doppler domain through SFFT, and performs linear correlation detection based on the reference pilot block in the Doppler domain.

For communication processing, for example, the receiving end performs demodulation and SFFT in sequence, transforms to the Doppler domain through SFFT, performs channel estimation on the received signal Y _c [k, l] in the Doppler domain, and converts the channel estimation result to Time-frequency domain, channel estimation results based on time-frequency domain and the demodulated signal Y _c [n,m] for signal detection.

Optionally, step 202 can be implemented in the following manner:

The receiving device obtains the first signal in the delayed Doppler domain based on the target signal, and performs sliding window correlation detection on the first signal in the delayed Doppler domain based on the reference pilot block to obtain the target The time delay and Doppler shift of the signal.

The size of the sliding window used in sliding window correlation detection can be the same as the size of the pilot block. For example, when the pilot block does not have a cyclic prefix and a cyclic suffix, the two sizes are the same. When the pilot block has a cyclic prefix and/or a cyclic suffix, the size of the sliding window is the same as the size of the pilot block without the cyclic prefix and cyclic suffix. The frequency symbols occupy the same size.

Optionally, the pilot blocks included in the target signal are obtained by scrambling pilot blocks based on the time-frequency domain using a scrambling sequence, and the data blocks included in the target signal are obtained by using a scrambling sequence. Obtained after scrambling.

Optionally, the scrambling process is scrambling process for modulation symbols.

Optionally, the scrambling sequences used in the pilot block and the data block are different.

Optionally, the pilot block is a pilot block with two-dimensional autocorrelation characteristics.

Optionally, the pilot block is generated based on at least two autocorrelation sequences.

Optionally, the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, and the pilot block is a Crone sequence of the first autocorrelation sequence and the second autocorrelation sequence. Gram product or vector multiplication.

Optionally, the first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.

Optionally, the pilot sequences formed by each column of pilot symbols in the pilot block respectively have a cyclic prefix; and/or,

The pilot sequences formed by each row of pilot symbols in the pilot block respectively have a cyclic prefix; and/or,

The pilot sequences formed by each row of pilot symbols in the pilot block respectively have cyclic suffixes.

ZC sequence, constant envelope zero autocorrelation sequence CAZAC sequence, maximum length sequence, Barker code, low ambiguity area LAZ code, zero ambiguity area ZAZ code, Gold sequence, Kasami code, JPL sequence, Walsh-Hadama Walsh-Hadamard coding.

Optionally, any pilot symbol X _p [k, l] in the pilot block satisfies: l _p -l ₁ ≤ l ≤ _{l p} + l ₂ in the delay dimension, and satisfies : k _p -k ₁ ≤ k ≤ _{k p} + k ₂ ; where k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, (k _p , l _p ) is the coordinate of the reference point in the pilot block in the Doppler dimension and the delay dimension; l ₁ , l ₂ , k ₁ and k ₂ are integers greater than or equal to 0. The length of the pilot block in the delay dimension is M _p =l ₁ +l ₂ +1 ≤ M, the length of the pilot block in the Doppler dimension is N _p =k ₁ +k ₂ +1 ≤ N; the M is the delayed Doppler domain resource grid The length in the delay dimension; the N is the length of the delay Doppler domain resource grid in the delay dimension.

Optionally, the pilot block contains a cyclic prefix of a delay dimension, and the pilot block satisfies the following delay conditions:

l _cp represents the length of the cyclic prefix of the pilot sequence formed by the pilot symbols of the delay dimension in the pilot block.

Optionally, the pilot block includes a cyclic prefix and a cyclic suffix of a Doppler dimension, and the pilot block satisfies the following Doppler condition:

k _cp represents the length of the cyclic prefix of the pilot sequence formed by the Doppler-dimensional pilot symbols in the pilot block, k _cs represents the pilot sequence formed by the Doppler-dimensional pilot symbols in the pilot block The length of the cyclic suffix.

Optionally, the scrambling sequence includes at least one of the following:

Zadoff-Chu sequence, pseudo noise PN sequence.

The specific implementation process and technical effects of the signal receiving method in the embodiment of the present application are the same as those in the method embodiment on the sending device side. For details, please refer to the detailed introduction in the method embodiment on the sending device side, and will not be described again here.

For the signal sending method provided by the embodiment of the present application, the execution subject may be a signal sending device. For the signal receiving method provided by the embodiment of the present application, the execution subject may be a signal receiving device. In the embodiments of the present application, a signal sending device executing a signal sending method and a signal receiving device executing a signal receiving method are taken as an example to illustrate the signal sending device and signal receiving device provided in the embodiments of the present application.

Figure 9 is a schematic structural diagram of a signal sending device provided by an embodiment of the present application. As shown in Figure 9, the signal sending device provided in this embodiment includes:

Processing module 210, configured to transform a pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one DRE mapped to a delayed Doppler domain resource element pilot symbols on;

The sending module 220 is used to send a target signal to a receiving device based on the added signal.

Optionally, the processing module 210 is also used to:

The pilot block in the time-frequency domain and the data block in the time-frequency domain are scrambled using a scrambling sequence respectively.

Optionally, the scrambling sequence used in the pilot block and the data block in the time-frequency domain is different.

Optionally, the processing module 210 is further configured to:

The pilot block with two-dimensional autocorrelation characteristics is generated according to at least two autocorrelation sequences.

Optionally, the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, and the processing module 210 is specifically used to:

The Kronecker product or vector of the first autocorrelation sequence and the second autocorrelation sequence is multiplied as the pilot block.

Optionally, the first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.

Optionally, any pilot symbol Xp[ _k ,l] in the pilot block satisfies the _following conditions in the delay dimension: _lp - _l1≤l≤lp + _l2 , and in the Doppler dimension: _kp - _k1≤k≤kp + _k2 ; wherein k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, and ( _kp , _lp ) are the coordinates of a reference point in the pilot block in the Doppler dimension and the delay dimension; _l1 _, _l2 , _k1 and _k2 are integers greater than or equal to 0; the length of the pilot block in the delay dimension is _Mp = _l1 + _l2 +1≤M, and the length of the pilot block in the Doppler dimension is _Np = _k1 + _k2 +1≤N; M is the length of a delayed Doppler domain resource grid in the delay dimension; and N is the length of a delayed Doppler domain resource grid in the delay dimension.

Optionally, the transmission power of the pilot block in the time-frequency domain is greater than the transmission power of the data block.

The signal sending device in the embodiment of the present application can be used to perform the method of any of the foregoing sending device side method embodiments. Its specific implementation process and technical effect are the same as those in the sending device side method embodiment. For details, see Sending Device The detailed introduction of the side method embodiment will not be described again here.

Figure 10 is a schematic structural diagram of a signal receiving device provided by an embodiment of the present application. As shown in Figure 10, the signal receiving device provided in this embodiment includes:

The receiving module 310 is used to receive the target signal sent by the transmitting device; the target signal is obtained by adding a pilot block in the time-frequency domain and a data block in the time-frequency domain. The pilot block in the time-frequency domain is Delayed Doppler Domain Pilot Obtained by block transformation; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE; the data block includes at least one data symbol;

The processing module 320 is configured to perform detection processing based on the target signal.

Optionally, the processing module 320 is specifically used to:

Based on the target signal, a first signal in the delayed Doppler domain is obtained, and based on the reference pilot block, sliding window correlation detection is performed on the first signal in the delayed Doppler domain to obtain the time delay of the target signal and Doppler shift.

Optionally, the first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.

Optionally, any pilot symbol X _p [k, l] in the pilot block satisfies: l _p -l ₁ ≤ l ≤ _{l p} + l ₂ in the delay dimension, and satisfies : k _p -k ₁ ≤ k ≤ _{k p} + k ₂ ; where k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, (k _p ,l _p ) is the coordinate of the reference point in the pilot block in the Doppler dimension and the delay dimension; l ₁ , l ₂ , k ₁ and k ₂ are integers greater than or equal to 0. The length of the pilot block in the delay dimension is M _p =l ₁ +l ₂ +1 ≤ M, the length of the pilot block in the Doppler dimension is N _p =k ₁ +k ₂ +1 ≤ N; the M is the delayed Doppler domain resource grid The length in the delay dimension; the N is the length of the delay Doppler domain resource grid in the delay dimension.

Optionally, the pilot block includes a cyclic prefix and a cyclic suffix of Doppler dimensions, and the pilot block satisfies the following Doppler conditions:

The signal receiving device in the embodiment of the present application can be used to perform the method of any of the foregoing receiving device side method embodiments. Its specific implementation process and technical effects are the same as those in the receiving device side method embodiments. For details, see Receiving Equipment The detailed introduction of the side method embodiment will not be described again here.

The signal sending device and the signal receiving device in the embodiments of the present application may be electronic equipment, such as an electronic equipment with an operating system, or may be components in the electronic equipment, such as integrated circuits or chips. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The signal sending device and signal receiving device provided in the embodiments of the present application can implement the various processes implemented in the method embodiments of Figures 4 to 8 and achieve the same technical effects. To avoid repetition, they will not be described here.

Optionally, as shown in Figure 11, this embodiment of the present application also provides a communication device 1200, which includes a processor 1201 and a memory 1202. The memory 1202 stores programs or instructions that can be run on the processor 1201, such as , when the communication device 1200 is a sending device, when the program or instruction is executed by the processor 1201, each step of the above signal sending method embodiment is implemented, and the same technical effect can be achieved. When the communication device 1200 is a receiving device, when the program or instruction is executed by the processor 1201, each step of the above signal receiving method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface. When the terminal is a transmitting device, the processor is used to precode the pilot block and add it to the data block symbol by symbol; the pilot block includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE in the delayed Doppler domain; the data block includes at least one data symbol; the communication interface is used to send a target signal to the receiving device based on the added signal. This transmitting device embodiment corresponds to the above-mentioned transmitting device side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the transmitting device embodiment, and can achieve the same technical effect. Specifically, Figure 12 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 1000 includes but is not limited to: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, processor 1010, etc. at least some parts of it.

Those skilled in the art can understand that the terminal 1000 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in Figure 12 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (Graphics Processing Unit, GPU) 10041 and a microphone 10042. The graphics processor 10041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072 . Touch panel 10071, also known as touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1001 can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network side device. Generally, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 1009 may be used to store software programs or instructions as well as various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage program or instruction area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, image playback function, etc.), etc. Additionally, memory 1009 may include volatile memory or nonvolatile memory, or memory 1009 may include both volatile and nonvolatile memory. Including high-speed random access memory, it can also include non-volatile memory, where the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), programmable read-only memory (Programmable ROM, PROM), Erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), 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, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 1009 in embodiments of the present application includes, but is not limited to, these and any other suitable type of memory such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

The processor 1010 may include one or more processing units; optionally, the processor 1010 may integrate an application processor and a modem processor, where the application processor mainly processes operating systems, user interfaces, application programs or instructions, etc. In operation, the modem processor mainly processes wireless communication signals, such as the baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1010.

The processor 1010 is configured to transform a pilot block in a delay Doppler domain into a pilot block in a time-frequency domain; the pilot block in the delay Doppler domain includes at least one pilot symbol mapped to a delay Doppler domain resource element DRE;

The radio frequency unit 1001 is configured to send a target signal to the receiving device based on the added signal.

Optionally, the processor 1010 is also used to:

Optionally, the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, and the processor 1010 is specifically configured to:

Optionally, the first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.

Optionally, any pilot symbol X _p [k, l] in the pilot block satisfies: l _p -l ₁ ≤ l ≤ _{l p} + l ₂ in the delay dimension, and satisfies : k _p -k ₁ ≤ k ≤ _{k p} + k ₂ ; where k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, (k _p ,l _p ) is the coordinate of the reference point in the pilot block in the Doppler dimension and the delay dimension; l ₁ , l ₂ , k ₁ and k ₂ are integers greater than or equal to 0; the pilot The length of the block in the delay dimension is M _p =l ₁ +l ₂ +1 ≤ M, and the length of the pilot block in the Doppler dimension is N _p =k ₁ +k ₂ +1 ≤ N; the M is The length of the delayed Doppler domain resource grid in the delay dimension; the N is the length of the delayed Doppler domain resource grid in the delay dimension.

The terminal of this embodiment can be used to perform the signal sending method in the aforementioned sending device side embodiment. Its specific implementation process and technical effects are similar to those in the sending device side method embodiment. For details, please refer to the sending device side method embodiment. Detailed introduction will not be repeated here.

Optionally, the terminal in this embodiment can also be a receiving device. In the case where the terminal is a receiving device, the terminal in this embodiment can perform the signal sending method in the above embodiment on the receiving device side, and its specific implementation process and technical effects Similar to the method embodiment on the receiving device side, for details, please refer to the detailed introduction in the method embodiment on the receiving device side, and will not be described again here.

An embodiment of the present application also provides a network side device, including a processor and a communication interface. When the network side device is a receiving device, the communication interface is used in a receiving module to receive the target signal sent by the sending device; the target signal is based on the pilot block and data block processed by precoding. The signal obtained after symbol addition; the pilot block includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE in the delayed Doppler domain; the data block includes at least one data symbol; The processor is configured to perform detection processing based on the target signal to obtain the time delay amount and Doppler shift amount of the target signal. This network-side device embodiment corresponds to the above-mentioned receiving device method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 13 , the network side device 700 includes: an antenna 71 , a radio frequency device 72 , a baseband device 73 , a processor 75 and a memory 75 . The antenna 71 is connected to the radio frequency device 72 . In the uplink direction, the radio frequency device 72 receives information through the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be sent and sends it to the radio frequency device 72. The radio frequency device 72 processes the received information and then sends it out through the antenna 71.

The frequency band processing device may be located in the baseband device 73, and the method performed by the network side device in the above embodiment may be implemented in the baseband device 73, which includes a baseband processor.

The baseband device 73 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network device operations shown in the above method embodiments.

The network side device may also include a network interface 76 for exchanging information with the radio frequency device 72. The interface is, for example, a common public radio interface (CPRI).

Specifically, the network side device 700 in the embodiment of the present application also includes: instructions or programs stored in the memory 75 and executable on the processor 74. The processor 74 calls the instructions or programs in the memory 75 to execute as shown in Figure 9 or Figure 9 The method of executing the module shown in 10 and achieving the same technical effect will not be repeated here to avoid repetition.

Optionally, the network side device in this embodiment can also be a sending device. In the case where the network side device is a sending device, the network side device in this embodiment can perform the signal sending method in the above sending device side embodiment, in which The specific implementation process and technical effects are similar to those in the sending device side method embodiment. For details, please refer to the detailed introduction in the sending device side method embodiment, and will not be described again here.

Embodiments of the present application also provide a readable storage medium, with programs or instructions stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above signal sending method and signal receiving method embodiments is implemented. And can achieve the same technical effect. To avoid repetition, they will not be described again here.

The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, and examples of computer-readable storage media include non-transitory computer-readable storage media, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

An embodiment of the present application also provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above signal sending method and signal receiving. Each process of the method embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.

It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

Embodiments of the present application also provide a computer program/program product. The computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the above signal sending. Each process of the embodiments of the sending method and the signal receiving method can achieve the same technical effect. To avoid repetition, they will not be described again here.

Embodiments of the present application also provide a communication system, including: a sending device and a receiving device. The sending device can be used to perform the steps of the signal sending method as described above. The receiving device can be used to perform the signal receiving as described above. Method steps.

It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A method of signaling, including:

The sending device converts the pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one pilot mapped to the delayed Doppler domain resource element DRE. symbol;

The sending device adds the pilot block in the time-frequency domain to the data block in the time-frequency domain; the data block includes at least one data symbol;

The sending device sends the target signal to the receiving device based on the added signal.
The signal sending method according to claim 1, before the sending device adds the pilot block in the time-frequency domain and the data block in the time-frequency domain, it further includes:

The sending device performs scrambling processing on the pilot block in the time-frequency domain and the data block in the time-frequency domain using a scrambling sequence respectively.
The signal transmission method according to claim 2, wherein the scrambling process is a scrambling process for modulation symbols.
The signal transmission method according to claim 2, wherein the scrambling sequences used in the pilot block and the data block in the time-frequency domain are different.
The signal sending method according to any one of claims 1-4, wherein,

The pilot block is a pilot block with two-dimensional autocorrelation characteristics.
The signal sending method according to claim 5, before the sending device transforms the pilot block in the delayed Doppler domain into the pilot block in the time-frequency domain, it further includes:

The sending device generates the pilot block with two-dimensional autocorrelation characteristics based on at least two autocorrelation sequences.
The signal sending method according to claim 6, wherein the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, and the sending device generates the Pilot blocks with two-dimensional autocorrelation characteristics, including:

The sending device multiplies the Kronecker product or vector of the first autocorrelation sequence and the second autocorrelation sequence as the pilot block.
The signal transmission method according to claim 7, wherein,

The first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.
The signal sending method according to any one of claims 1-4, wherein,

The pilot sequences formed by the pilot symbols of the delay dimension in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic suffixes.
The signal sending method according to any one of claims 1-4, wherein,

Any pilot symbol X p [k, l] in the pilot block satisfies: l p -l 1 ≤ l ≤ l p + l 2 in the delay dimension and satisfies: k p - in the Doppler dimension. k 1 ≤ k ≤ k p + k 2 ; where k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, (k p , l p ) is the derivative The coordinates of the reference point in the frequency block in the Doppler dimension and the delay dimension; l 1 , l 2 , k 1 and k 2 are integers greater than or equal to 0; the length of the pilot block in the delay dimension is M p = l 1 +l 2 +1≤M, the length of the pilot block in the Doppler dimension is N p =k 1 +k 2 +1≤N; the M is the delay Doppler domain resource grid in the delay dimension The length of N is the length of the delay Doppler domain resource grid in the delay dimension.
The signal sending method according to claim 10, wherein,

The pilot block contains a cyclic prefix of delay dimension, and the pilot block satisfies the following delay conditions:

l cp represents the length of the cyclic prefix of the pilot sequence formed by the pilot symbols of the delay dimension in the pilot block.
The signal sending method according to claim 10, wherein,

The pilot block contains a cyclic prefix and a cyclic suffix of the Doppler dimension, and the pilot block satisfies the following Doppler conditions:

k cp represents the length of the cyclic prefix of the second autocorrelation sequence, and k cs represents the length of the cyclic suffix of the second autocorrelation sequence.
The signal sending method according to any one of claims 1-4, wherein,

The transmission power of the pilot block in the time-frequency domain is greater than the transmission power of the data block.
A signal receiving method including:

The receiving device receives the target signal sent by the sending device; the target signal is obtained by adding a pilot block based on the time-frequency domain and a data block based on the time-frequency domain. The pilot block in the time-frequency domain is a delayed Doppler obtained by transforming the pilot block of the delayed Doppler domain; the pilot block of the delayed Doppler domain includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE; the data block includes at least one data symbol;

The receiving device performs detection processing based on the target signal.
The signal receiving method according to claim 14, wherein the receiving device performs detection processing based on the target signal, comprising:

The receiving device obtains the first signal in the delayed Doppler domain based on the target signal, and performs sliding window correlation detection on the first signal in the delayed Doppler domain based on the reference pilot block to obtain the target The time delay and Doppler shift of the signal.
The signal receiving method according to claim 14 or 15, wherein the pilot block included in the target signal is obtained after the pilot block based on the time-frequency domain is scrambled using a scrambling sequence, and the data block included in the target signal is obtained after the scrambling process is performed using a scrambling sequence.
The signal receiving method according to claim 16, wherein the scrambling process is a scrambling process for modulation symbols.
The signal receiving method according to claim 16, wherein the scrambling sequence adopted by the pilot block and the data block is different.
The signal receiving method according to claim 14 or 15, wherein,

The pilot block is a pilot block with two-dimensional autocorrelation characteristics.
The signal receiving method according to claim 19, wherein:

The pilot block is generated based on at least two autocorrelation sequences.
The signal receiving method according to claim 20, wherein the at least two autocorrelation sequences include a first autocorrelation sequence and a second autocorrelation sequence, and the pilot block is the first autocorrelation sequence and the Kronecker product or vector product of the second autocorrelation sequence.
The signal receiving method according to claim 21, wherein,

The first autocorrelation sequence has a cyclic prefix; and/or,

The second autocorrelation sequence has a cyclic prefix and/or a cyclic suffix.
The signal receiving method according to claim 14 or 15, wherein,

The pilot sequences formed by the pilot symbols of the delay dimension in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic prefixes; and/or,

The pilot sequences formed by the pilot symbols in the Doppler dimension in the pilot block respectively have cyclic suffixes.
The signal receiving method according to claim 14 or 15, wherein,

Any pilot symbol X p [k, l] in the pilot block satisfies: l p -l 1 ≤ l ≤ l p + l 2 in the delay dimension and satisfies: k p - in the Doppler dimension. k 1 ≤ k ≤ k p + k 2 ; where k represents the coordinate of the pilot symbol in the Doppler dimension, l represents the coordinate of the pilot symbol in the delay dimension, (k p , l p ) is the derivative The coordinates of the reference point in the frequency block in the Doppler dimension and the delay dimension; l 1 , l 2 , k 1 and k 2 are integers greater than or equal to 0; the length of the pilot block in the delay dimension is M p = l 1 +l 2 +1≤M, the length of the pilot block in the Doppler dimension is N p =k 1 +k 2 +1≤N; the M is the delay Doppler domain resource grid in the delay dimension The length of N is the length of the delay Doppler domain resource grid in the delay dimension.
The signal receiving method according to claim 24, wherein,

The pilot block contains a cyclic prefix of delay dimension, and the pilot block satisfies the following delay conditions:

l cp represents the length of the cyclic prefix of the pilot sequence formed by the pilot symbols of the delay dimension in the pilot block.
The signal receiving method according to claim 24, wherein,

The pilot block contains a cyclic prefix and a cyclic suffix of the Doppler dimension, and the pilot block satisfies the following Doppler conditions:

k cp represents the length of the cyclic prefix of the pilot sequence formed by the Doppler-dimensional pilot symbols in the pilot block, k cs represents the pilot sequence formed by the Doppler-dimensional pilot symbols in the pilot block The length of the cyclic suffix.
The signal receiving method according to claim 14 or 15, wherein,

The transmission power of the pilot block is greater than the transmission power of the data block.
A signal sending device including:

A processing module configured to transform a pilot block in the delayed Doppler domain into a pilot block in the time-frequency domain; the pilot block in the delayed Doppler domain includes at least one mapped to a delayed Doppler domain resource element DRE. pilot symbols;

Add the pilot block in the time-frequency domain and the data block in the time-frequency domain; the data block includes at least one data symbol;

The sending module is used to send the target signal to the receiving device based on the added signal.
A signal receiving device including:

The receiving module is used to receive the target signal sent by the transmitting device; the target signal is obtained by adding a pilot block based on the time-frequency domain and a data block based on the time-frequency domain. The pilot block in the time-frequency domain is a delay The pilot block in the Doppler domain is transformed; the pilot block in the delayed Doppler domain includes at least one pilot symbol mapped to the delayed Doppler domain resource element DRE; the data block includes at least one data symbol;

A processing module is used to perform detection processing based on the target signal.
A sending device, including a processor and a memory, the memory stores a program or instructions that can be run on the processor, and when the program or instructions are executed by the processor, any one of claims 1 to 13 is implemented. The steps of the signal sending method.
A receiving device comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the signal receiving method as described in any one of claims 14 to 27 are implemented.
A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the signal sending method as described in any one of claims 1 to 13, or implements the steps of the signal receiving method as described in any one of claims 14 to 27.