WO2023185719A1

WO2023185719A1 - Signal transmission method and apparatus, sending end device, and receiving end device

Info

Publication number: WO2023185719A1
Application number: PCT/CN2023/084038
Authority: WO
Inventors: 刘劲; 刘昊; 袁璞; 史斯豪; 白永春; 陈保龙
Original assignee: 维沃移动通信有限公司
Priority date: 2022-03-28
Filing date: 2023-03-27
Publication date: 2023-10-05
Also published as: CN116866132A

Abstract

The present application relates to the technical field of communications, and discloses a signal transmission method and apparatus, a sending end device, and a receiving end device. The signal transmission method of embodiments of the present application comprises: a sending end device performs inverse symplectic Fourier transform (ISFFT) on a delay-Doppler domain signal to obtain a time-frequency domain signal; the sending end device performs scrambling processing on the time-frequency domain signal to obtain a scrambled time-frequency domain signal; the sending end device converts the scrambled time-frequency domain signal into a time domain signal; and the sending end device sends the time domain signal.

Description

Signal transmission method, device, sending end equipment and receiving end equipment

Cross-references to related applications

This application claims priority to Chinese Patent Application No. 202210317758.2 filed in China on March 28, 2022, the entire content of which is incorporated herein by reference.

Technical field

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

Background technique

The delay and Doppler characteristics of the channel are essentially determined by the multipath channel. Signals arriving at the receiver via different paths have different arrival times due to differences in propagation paths. Due to the time differences between the different echoes, their coherent superposition at the receiver side causes the observed signal amplitude jitter. Similarly, Doppler dispersion in multipath channels is also caused by the multipath effect. The Doppler effect is due to the relative speed of the two ends of the transmitter and the receiver. The signals arriving at the receiver after different paths have different incident angles relative to the normal line of the antenna, which results in differences in relative speeds, which in turn causes multiple signals on different paths. The Puller shift is different. To sum up, the signal seen at the receiver is the superposition of component signals with different delays and Dopplers from different paths. Delay Doppler analysis of the channel helps to collect delay Doppler information of each path, thereby reflecting the delay Doppler response of the channel.

Orthogonal Time Frequency Space (OTFS) modulation technology refers to logically mapping the information in a data packet of size M×N to an M×N on the two-dimensional delay Doppler plane. The pulses in each grid point modulate a symbol in the data packet. Furthermore, by designing a set of orthogonal two-dimensional basis functions, the data set on the M×N delayed Doppler domain plane is transformed into the N×M time-frequency domain plane. This transformation is mathematically called the inverse Inverse Sympletic Fourier Transform (ISFFT). Correspondingly, the transformation from the time-frequency domain to the delayed Doppler domain is called sympletic Fourier Transform (SFFT). The physical meaning behind it is that the delay and Doppler effect of the signal are actually a kind of signal The linear superposition effect of a series of echoes with different time and frequency offsets after the signal passes through multiple channels. In this sense, delayed Doppler analysis and time-frequency domain analysis can be obtained by mutual conversion of the ISFFT and SFFT.

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. The advantage is that OTFS eliminates the difficulty of tracking time-varying fading characteristics with traditional time-frequency domain analysis, and instead extracts all diversity characteristics of time-frequency domain channels through delayed Doppler domain analysis. In actual systems, since the number of delay paths and Doppler frequency shifts of the channel is far smaller than the number of time domain and frequency domain responses of the channel, the channel impulse response matrix represented by the delay Doppler domain is sparse. Using OTFS technology to analyze the sparse channel matrix in the delayed Doppler domain can make the reference signal packaging more compact and flexible.

However, the design of the OTFS system is based on raster quantization in the delayed Doppler domain. The reference signal of OTFS is usually a high-power single-point pulse in the delayed Doppler domain. This will cause the peak to average power ratio (PAPR) of the time domain signal of OTFS to be too large. At the same time, it will also cause excessive single-tone pilot interference between neighboring cells and users.

Contents of the invention

Embodiments of the present application provide a signal transmission method, device, transmitter equipment, and receiver equipment, which can solve the problem of excessive PAPR caused by single-tone pilots in the existing OTFS system.

In the first aspect, a signal transmission method is provided, including:

The transmitting end device performs the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

The sending device performs scrambling on the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

The sending device converts the scrambled time-frequency domain signal into a time domain signal;

The sending end device sends the time domain signal.

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

The receiving device converts the received time domain signal into a time-frequency domain signal;

The receiving end device descrambles the time-frequency domain signal to obtain a descrambled time-frequency domain signal;

The receiving end device performs a symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.

In a third aspect, an information transmission device is provided, including;

The first processing module is used to perform the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

A scrambling module, used to scramble the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

The second processing module is used to transform the scrambled time-frequency domain signal into a time domain signal;

The first sending module is used to send the time domain signal.

In a fourth aspect, an information transmission device is provided, including:

The third processing module is used to transform the received time domain signal into a time-frequency domain signal;

A descrambling module, used to descramble the time-frequency domain signal and obtain a descrambled time-frequency domain signal;

The fourth processing module is used to perform symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.

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

In a sixth aspect, a transmitting end device is provided, including a processor and a communication interface, wherein the processor is used to perform inverse symplectic Fourier transform ISFFT on a delayed Doppler domain signal to obtain a time-frequency domain signal; The time-frequency domain signal is scrambled to obtain a scrambled time-frequency domain signal; the scrambled time-frequency domain signal is converted into a time-domain signal, and the communication interface is used to send the time-domain signal.

In a seventh aspect, a receiving end device is provided. The receiving end device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are executed by the processor. When implementing the steps of the method described in the second aspect.

In an eighth aspect, a receiving end device is provided, including a processor and a communication interface, wherein the communication interface is used to receive a time domain signal; the processor is used to convert the received time domain signal into a time-frequency domain signal; The time-frequency domain signal is descrambled to obtain a descrambled time-frequency domain signal; the symplectic Fourier transform (SFFT) is performed on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.

In the ninth aspect, a communication system is provided, including: a sending end device and a receiving end device, so The sending device may be configured to perform the steps of the method described in the first aspect, and the receiving device may be configured to perform the steps of the method described in the second aspect.

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 method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the 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. method, or implement a 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 method, or the steps of implementing the method as described in the second aspect.

In the embodiment of this application, the transmitting end device converts the delayed Doppler domain signal into a time-frequency domain signal and then performs scrambling processing, and then converts the scrambled time-frequency domain signal into a time domain signal for transmission; it can solve the problem of single tone The problem of excessive PAPR caused by pilots is eliminated; and it can randomize the single-tone pilot interference between neighboring cells and users to avoid excessive single-tone pilot interference between neighboring cells and users.

Description of drawings

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied;

Figure 2 shows one of the step flow charts of the signal transmission method provided by the embodiment of the present application;

Figure 3 shows an example flow chart of the sending end device in the signal transmission method provided by the embodiment of the present application;

Figure 4 shows a schematic principle diagram of Example 1 provided by the embodiment of the present application;

Figure 5 shows a schematic diagram of the principle of Example 2 provided by the embodiment of the present application;

Figure 6 shows a schematic principle diagram of Example 4 provided by the embodiment of the present application;

Figure 7 shows a schematic diagram of the principle of Example 5 provided by the embodiment of the present application;

Figure 8 shows a schematic diagram of the principle of Example 6 provided by the embodiment of the present application;

Figure 9 shows a schematic principle diagram of Example 7 provided by the embodiment of the present application;

Figure 10 shows a schematic diagram of the principle of Example 8 provided by the embodiment of the present application;

Figure 11 shows the second step flow chart of the signal transmission method provided by the embodiment of the present application;

Figure 12 shows an example of the flow of the receiving end device in the signal transmission method provided by the embodiment of the present application. picture;

Figure 13 shows one of the schematic structural diagrams of the information transmission device provided by the embodiment of the present application;

Figure 14 shows the second structural schematic diagram of the information transmission device provided by the embodiment of the present application;

Figure 15 shows a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 16 shows a schematic structural diagram of a terminal provided by an embodiment of the present application;

Figure 17 shows a schematic structural diagram of a network side device provided by 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 the term NR is used in much of the following description. terms, but these technologies can also be applied to applications other than NR system applications, such as 6th Generation ( ^6th Generation, 6G) communication systems.

Figure 1 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 User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, 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 a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Fidelity (WiFi) node, etc. The base station may be called a Node B or an Evolved Node B. eNB), access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home 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. It needs to be explained that , in the embodiment of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited. Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (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 , CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), 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.

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

As shown in Figure 2, this embodiment of the present application also provides a signal transmission method, including:

Step 201, the transmitting end device performs the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

Optionally, in this step, the delayed Doppler domain signal is a two-dimensional signal and can be represented by a matrix; the time-frequency domain signal is a two-dimensional signal and can be represented by a matrix;

Step 202: The sending end device performs scrambling on the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

Step 203: The sending device converts the scrambled time-frequency domain signal into a time domain signal; for example, performs Heisenberg Transform on the scrambled time-frequency domain signal to obtain a time domain signal;

Step 204: The sending end device sends the time domain signal.

As an optional embodiment, the method further includes:

The transmitter device maps the modulated signal (i.e., Quadrature Amplitude Modulation, QAM) symbol mapping) to the data signal area of the delayed Doppler domain, and maps the pilot signal to the delayed Doppler domain. pilot signal area to obtain the delayed Doppler domain signal.

For example, as shown in Figure 3, the sender device process includes:

1) Map the modulated signal to the area where the data is placed in the delayed Doppler domain;

2) Map the pilot signal to the area where the pilot is placed in the delayed Doppler domain;

3) Perform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

4) Generate a scrambling sequence and scramble the time-frequency domain signal;

5) Perform Heisenberg Transform on the scrambled time-frequency domain signal to obtain the time domain signal for transmission.

In at least one embodiment of the present application, step 202 includes:

The sending end device performs dot multiplication of the time-frequency domain signal and the scrambling matrix to obtain a scrambled time-frequency domain signal; wherein the scrambling matrix and the time-frequency domain signal are both of M*N order is a two-dimensional matrix; M is the number of grid points in the delay domain of the delayed Doppler domain signal, and N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M and N are integers greater than 1 respectively. .

As an optional embodiment, the delay domain of the delay Doppler domain and the minimum data unit of the Doppler domain are resource elements (Resource Elements, RE); then M can be understood as the number of REs in the delay domain, and N can be understood as is the number of REs in the Doppler domain.

Assume that the time-frequency domain signal is The frequency domain signal is expressed as Its expression is where · represents the matrix dot multiplication operation, also known as symbol-by-symbol multiplication.

In at least one embodiment of the present application, the method further includes:

The sending device generates N scrambling sequences of length M according to the target parameters; it can also be said that each scrambling sequence includes M pieces of data;

The sending device selects m*N data from the M*N data of the N scrambling sequences;

The sending end device maps the m*N pieces of data to an initialization matrix according to the time-frequency resource positions of the resource elements RE that need to be scrambled, to obtain the scrambling matrix;

Wherein, the initialization matrix is a two-dimensional matrix with M rows and N columns, and the contents of the initialization matrix are all 1; m is an integer greater than 1, and m is less than or equal to M.

In the embodiment of the present application, all REs of the time-frequency domain signal may be scrambled, or only part of the REs may be scrambled. Therefore, the sending end device maps the m*N pieces of data to the initialization matrix according to the time-frequency resource positions of the REs that need to be scrambled, to obtain the scrambling matrix.

Wherein, the scrambling matrix is determined based on a scrambling sequence, the scrambling sequence is related to a target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of Orthogonal Frequency Division Multiplexing (OFDM) symbols;

Delayed Doppler domain pilot port number.

It should be noted that when the scrambling sequence is generated uniformly, the generation of the scrambling sequence is associated with the cell identifier (ID), user-specific ID, time slot number, and frame number; when the scrambling sequence is generated one by one OFDM symbol, In addition to the above parameters, the generation of the scrambling sequence is also associated with the symbol index of the OFDM symbol.

In at least one optional embodiment of the present application, the scrambling sequence is a ZC sequence, or a Gold sequence, or a longest linear feedback shift register sequence (which may be referred to as an M sequence for short).

As an optional embodiment, the target parameters are associated with parameters required to generate the scrambling sequence; wherein,

In the case where the scrambling sequence is a ZC sequence, the parameters required to generate the ZC sequence include: root index and cyclic shift value;

or,

In the case where the scrambling sequence is a Gold sequence, the parameters required to generate the Gold sequence include: initialization state, or a cyclic shift combination of two M sequences;

or,

When the scrambling sequence is an M sequence, the parameters required to generate the M sequence include: shift value, initialization state, primitive polynomial (equivalent to the shift register structure of the generated sequence), shift register output Intercept position (similar to Nc=1600).

It should be noted that when the scrambling sequence is a Gold sequence or an M sequence, the sequence needs to be modulated, that is, the sending device generates N scrambling sequences of length M according to the target parameters, including:

The sending end device obtains the parameters associated with the target parameters required to generate the scrambling sequence;

The sending device generates corresponding pseudo-random bits according to the parameters required to generate the scrambling sequence;

The sending device modulates the pseudo-random bits to generate N scrambling sequences of length M.

Optionally, the modulation method can be binary phase shift keying (BPSK), quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK), binary phase shift keying for PI/2 (PI/ 2-BPSK) and other methods, which are not specifically limited here.

As another optional embodiment, the sending device selects m*N data from the M*N data of each of the N scrambling sequences, including:

The sending device selects the first m*N data from the M*N data;

or,

The sending device selects the first m data from the M data in each column to obtain m*N data;

or,

The sending device selects m*N pieces of data according to the time-frequency resource locations of the REs that need to be scrambled.

In at least one embodiment of the present application, before the sending end device performs scrambling on the time-frequency domain signal, the method further includes:

The sending end device determines that all REs or part of the REs of the time-frequency domain signal need to be scrambled; the part of the REs is determined based on the first information; wherein the first information includes:

The index value of the preset scrambling mode; different scrambling modes correspond to different REs that need to be scrambled;

The starting position of the RE that needs to be scrambled is separated from the RE;

The end position of the RE to be scrambled is separated from the RE.

For example, several common or typical scrambling modes are set, and the index value of the scrambling mode indicates the time-frequency resource location of the RE that needs to be scrambled.

In yet another optional embodiment of the present application, step 202 includes:

The sending device performs scrambling processing on the real part and the imaginary part of the time-frequency domain signal, respectively, to obtain a scrambled time-frequency domain signal;

or,

The sending end device performs overall scrambling on the time-frequency domain signal in the form of a complex number to obtain a scrambled time-frequency domain signal.

In order to more clearly describe the signal scrambling process in the signal transmission method provided by the embodiment of the present application, several examples will be described below.

Example 1: Selection of time-frequency resource locations for scrambling REs

In the technical solution of this application, all REs in the time-frequency domain signals can be scrambled, or a part of the REs in the time-frequency domain can be selected to be scrambled. The time-frequency resource location of the RE that needs to be scrambled can be determined through the preset pattern (scrambling mode) index number, and each resource can be calculated through the cell ID, user-specific ID, frame number, time slot number, and time domain index. The starting RE position RE_START and RE interval RE_GAP that need to be scrambled in a time domain. As shown in Figure 4, RE_START is 0 on the odd time domain index, RE_START is 1, and RE_GAP is 1 on the even time domain index.

Example 2: Selection of time-frequency resource locations for scrambling REs 2

In the technical solution of this application, all REs in the time-frequency domain signals can be scrambled, or a part of the REs in the time-frequency domain can be selected to be scrambled. The time-frequency resource location of the RE that needs to be scrambled can be determined through the preset pattern (scrambling mode) index number, and each time domain can be calculated through the cell ID, user-specific ID, frame number, timeslot number, and time domain index. The starting RE position RE_START and RE interval RE_GAP that need to be scrambled. As shown in Figure 5, RE_START switches between 0 and 2 as the time domain index changes, and when RE_GAP is 2, a schematic diagram of the RE that needs to be scrambled.

Example 3, scrambling method

The scrambling in the embodiment of this application is to scramble the time-frequency domain signal of OTFS. The time-frequency domain signal of OTFS is in complex form and has the following scrambling methods:

1) Generate a scrambling matrix of complex numbers, and perform scrambling in the form of complex point multiplication of complex numbers;

2) Generate a set of real number scrambling matrices, and perform scrambling in the form of real numbers dot multiplied by complex numbers;

3) Generate two sets of scrambling matrices of real numbers, which can be obtained by splitting the real and imaginary parts of a set of complex number sequences, and dot-multiplying the real and imaginary parts of the sequence to be scrambled respectively;

4) During descrambling, the sequence to be descrambled is dot-multiplied by the conjugate of the scrambling sequence.

Example 4, scrambling sequence generation, the scrambling sequence uses ZC sequence

When the scrambling sequence uniformly generates a set of long sequences, the steps for generating the ZC sequence are shown in Figure 6:

1) Use parameters such as cell ID, user-specific ID, frame number, timeslot number, etc. to generate the ZC sequence required Root index and loop index;

2) Use the root index, cycle index, and offset (OFFSET) to generate a set of ZC sequences of sufficient length. The length is greater than or equal to the actual sequence length required, which is assumed to be (M*N+OFFSET);

3) Offset OFFSET data, take the remaining M*N data, and generate N scrambling sequences of length M.

Example 5, scrambling sequence generation, the scrambling sequence uses ZC sequence

When the scrambling sequence uniformly generates a set of short sequences, the steps for generating the ZC sequence are shown in Figure 7:

1) Use parameters such as cell ID, user-specific ID, frame number, timeslot number, etc. to generate the root index and cycle index required for the ZC sequence;

2) Use the root index, cycle index, and OFFSET to generate a set of ZC sequences of sufficient length. The length is greater than or equal to the actual sequence length required, which is assumed to be (M+OFFSET);

3) Offset OFFSET data and take the remaining M data;

4) Repeat M pieces of data N times to obtain N scrambling sequences of length M.

Example 6, scrambling sequence generation, the scrambling sequence uses ZC sequence

When the scrambling sequences are generated according to the index values in the time domain, the steps for generating the ZC sequence are as shown in Figure 8:

1) Use parameters such as cell ID, user-specific ID, frame number, time slot number, index number in the time domain and other parameters to generate the root index and cyclic index required for N groups of ZC sequences;

2) Use the root index, cycle index, and OFFSET to generate N groups of ZC sequences of sufficient length, the length is greater than or equal to the actual sequence length required, assumed to be (M+OFFSET);

3) Each group is offset by OFFSET data, and the remaining M data are taken to obtain N scrambling sequences of length M.

Example 7, scrambling sequence generation, the scrambling sequence uses M sequence

The steps to generate the M sequence are shown in Figure 9:

1) Use parameters such as cell ID, user-specific ID, frame number, time slot number, etc. to generate the initialization value (cinit), shift value, primitive polynomial, and interception position NC of the shift register output required for the M sequence;

2) Use the above parameters to generate pseudo-random bits with a length of (M+OFFSET)*MOD_LEN. When the modulation method is BPSK or PI/2-BPSK, MOD_LEN is 1, and when the modulation method is QPSK, MOD_LEN is 2;

3) Modulate the pseudo-random bits of (M+OFFSET)*MOD_LEN into a scrambling sequence of length (M+OFFSET);

4) Offset the OFFSET point, take a scrambling sequence of length M, and repeat it N times to obtain N scrambling sequences of length M;

Example 8, scrambling sequence generation, the scrambling sequence uses the Gold sequence

Scrambling sequences can be generated separately in the time domain. In this case, the index value (0~N-1) in the time domain is associated with the generation of the scrambling sequence. The steps are shown in Figure 10:

1) Use the cell ID, user-specific ID, frame number, time slot number, and time domain index to generate N sets of parameters required for the Gold sequence;

2) Use the above parameters to generate pseudo-random bits with a length of N groups (M+OFFSET)*MOD_LEN. When the modulation method is BPSK or PI/2-BPSK, MOD_LEN is 1, and when the modulation method is QPSK, MOD_LEN is 2;

3) Modulate N groups of (M+OFFSET)*MOD_LEN pseudo-random bits into a scrambling sequence of length (M+OFFSET);

4) For each group of scrambling sequences, take the following M points to obtain N scrambling sequences of length M.

In summary, in the embodiment of the present application, the transmitting end device converts the delayed Doppler domain signal into a time-frequency domain signal, performs scrambling processing, and then converts the scrambled time-frequency domain signal into a time domain signal for transmission; it can It solves the problem of excessive PAPR caused by single-tone pilots; and can realize randomization of single-tone pilot interference between neighboring cells and users to avoid excessive single-tone pilot interference between neighboring cells and users.

As shown in Figure 11, this embodiment of the present application also provides a signal transmission method, including:

Step 1101: The receiving end device converts the received time domain signal into a time-frequency domain signal, for example, performs Wegener transform on the received time domain signal to obtain a time-frequency domain signal;

Step 1102: The receiving end device descrambles the time-frequency domain signal to obtain a descrambled time-frequency domain signal;

Step 1103: The receiving end device performs symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.

Optionally, the delayed Doppler domain signal is a two-dimensional signal and can be represented by a matrix; the time-frequency domain signal is a two-dimensional signal and can be represented by a matrix.

Among them, the dimension of the above delayed Doppler domain signal is M*N, where M is the grid point of the delay domain Number, N is the number of grid points in the Doppler field; M, N are integers greater than 1 respectively.

The receiving end device determines the pilot signal area from the delayed Doppler domain signal according to the pilot signal mapping rule of the transmitting end device and performs channel estimation;

The receiving end device determines the data signal area from the delayed Doppler domain signal according to the mapping rules of the transmitted short-term combined data signal, and performs signal detection.

For example, as shown in Figure 12, the receiving device process includes:

1) Perform Wigner Transform on the time domain signal to obtain the time-frequency domain signal;

2) Generate a scrambling sequence and take the conjugate to descramble the time-frequency domain signal;

3) Perform symplectic Fourier transform on the time-frequency domain signal to obtain the delayed Doppler domain signal;

4) According to the pilot signal mapping rules of the transmitter, find the pilot signal area from the delayed Doppler domain signal and perform channel estimation;

5) According to the data signal mapping rules of the transmitter, find the data signal area from the delayed Doppler domain signal and perform signal detection.

In at least one embodiment of the present application, step 1102 includes:

The receiving end device performs dot multiplication of the time-frequency domain signal and the descrambling matrix to obtain a descrambled time-frequency domain signal; both the descrambling matrix and the time-frequency domain signal are quadratic of order M*N. dimensional matrix; M is the number of grid points in the delay domain of the delayed Doppler domain signal, and N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M and N are respectively integers greater than 1.

As an optional embodiment, the method further includes:

The receiving end device generates a first matrix of M rows and N columns (the first matrix is the same as the scrambling matrix of the transmitting end, and the generation method is also the same);

The receiving end device takes the conjugate of the first matrix to obtain the descrambling matrix.

In at least one embodiment of the present application, the receiving end device generates a first matrix of M rows and N columns, including:

The receiving device generates N descrambling sequences of length M according to the target parameters;

The receiving end device selects m*N data from the M*N data of the N descrambling sequences;

The receiving end device maps the m*N pieces of data to an initialization matrix according to the resource element RE time-frequency resource positions that need to be descrambled, to obtain the first matrix;

Wherein, the first matrix is determined based on a descrambling sequence, the descrambling sequence is related to the target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of OFDM symbol;

Delayed Doppler domain pilot port number.

It should be noted that when the descrambling sequence is generated uniformly, the generation of the descrambling sequence is associated with the cell ID, user-specific ID, time slot number, and frame number; when the descrambling sequence is generated by OFDM symbols, the generation of the descrambling sequence is in addition to In addition to the above parameters, the symbol index of the OFDM symbol is also associated.

In at least one optional embodiment of the present application, the descrambling sequence is a ZC sequence, or a Gold sequence, or a longest linear feedback shift register M sequence.

As an optional embodiment, the target parameters are associated with parameters required to generate the descrambling sequence; wherein,

In the case where the descrambling sequence is a ZC sequence, the parameters required to generate the ZC sequence include: root index and cyclic shift value;

or,

In the case where the descrambling sequence is a Gold sequence, the parameters required to generate the Gold sequence include: initialization state, or a cyclic shift combination of two M sequences;

or,

When the descrambling sequence is an M sequence, the parameters required to generate the M sequence include: shift value, initialization state, primitive polynomial, and interception position of the shift register output.

As an optional embodiment, the receiving device selects m*N data from the M*N data of the N descrambling sequences, including:

The receiving device selects the first m*N data from the M*N data;

or,

The receiving device selects the first m data from the M data in each column to obtain m*N data;

or,

The receiving end device selects m*N data according to the time-frequency resource position of the RE that needs to be scrambled.

In at least one embodiment of the present application, the receiving end device descrambles the time-frequency domain signal to obtain a descrambled time-frequency domain signal, including:

The receiving end device descrambles the real part and the imaginary part of the time-frequency domain signal respectively to obtain a descrambled time-frequency domain signal;

or,

The receiving end device descrambles the time-frequency domain signal as a whole in the form of complex numbers to obtain a descrambled time-frequency domain signal.

In summary, in the embodiment of the present application, the transmitting end device converts the delayed Doppler domain signal into a time-frequency domain signal and then performs scrambling processing, and then converts the scrambled time-frequency domain signal into a time domain signal for transmission; accordingly , the receiving end device converts the time domain received signal into a time-frequency domain signal, then performs descrambling processing, and then transforms into the delayed Doppler domain; it can solve the problem of excessive PAPR caused by single tone pilot; and can achieve neighbor Randomize the single-tone pilot interference between areas and users to avoid excessive single-tone pilot interference between neighboring cells and users.

For the signal transmission method provided by the embodiments of the present application, the execution subject may be a signal transmission device. In the embodiment of the present application, a signal transmission device performing a signal transmission method is used as an example to illustrate the signal transmission device provided by the embodiment of the present application.

As shown in Figure 13, this embodiment of the present application also provides an information transmission device 1300, including;

The first processing module 1301 is used to perform the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

The scrambling module 1302 is used to scramble the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

The second processing module 1303 is used to transform the scrambled time-frequency domain signal into a time domain signal;

The first sending module 1304 is used to send the time domain signal.

As an optional embodiment, the scrambling module includes:

The first scrambling submodule is used to perform dot multiplication of the time-frequency domain signal and the scrambling matrix to obtain the scrambling matrix. The scrambled time-frequency domain signal; wherein, the scrambling matrix and the time-frequency domain signal are both two-dimensional matrices of order M*N; M is the number of grid points in the delay domain of the delayed Doppler domain signal, N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M and N are respectively integers greater than 1.

As an optional embodiment, the device further includes:

The first generation module is used to generate N scrambling sequences of length M according to the target parameters;

The first selection module is used to select m*N data from the M*N data of the N scrambling sequences;

The first mapping module is used to map the m*N data to the initialization matrix according to the time-frequency resource positions of the resource elements RE that need to be scrambled, to obtain the scrambling matrix;

As an optional embodiment, the scrambling matrix is determined based on a scrambling sequence, the scrambling sequence is related to a target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of OFDM symbol;

Delayed Doppler domain pilot port number.

As an optional embodiment, the scrambling sequence is a ZC sequence, a Gold sequence, or an M sequence.

or,

When the scrambling sequence is an M sequence, the parameters required to generate the M sequence include: shift value, initialization state, primitive polynomial, and interception position of the shift register output.

As an optional embodiment, when the scrambling sequence is a Gold sequence or an M sequence, the first generation module is further used to:

Obtaining parameters required to generate the scrambling sequence associated with the target parameters;

Generate corresponding pseudo-random bits according to the parameters required to generate the scrambling sequence;

The pseudo-random bits are modulated to generate N scrambling sequences of length M.

As an optional embodiment, the first selection module is further used to:

Select the first m*N data from the M*N data;

or,

From the M data in each column, select the first m data to obtain m*N data;

or,

According to the time-frequency resource location of the RE that needs to be scrambled, m*N pieces of data are selected.

As an optional embodiment, the device further includes:

A signal mapping module, used to map the modulated signal to the data signal area of the delayed Doppler domain, and map the pilot signal to the pilot signal area of the delayed Doppler domain to obtain the delayed Doppler domain signal .

As an optional embodiment, the device further includes:

The first determination module is used by the device to determine that all REs or part of the REs of the time-frequency domain signal need to be scrambled; the part of the REs is determined based on the first information; wherein the first information includes:

The end position of the RE to be scrambled is separated from the RE.

As an optional embodiment, the scrambling module includes:

The second scrambling submodule is used to enter scrambling processing on the real part and the imaginary part of the time-frequency domain signal respectively to obtain a scrambled time-frequency domain signal;

Or, it is used to scramble the time-frequency domain signal as a whole in the form of complex numbers to obtain a scrambled time-frequency domain signal.

In the embodiment of this application, the transmitting end device converts the delayed Doppler domain signal into a time-frequency domain signal and then performs scrambling processing, and then converts the scrambled time-frequency domain signal into a time-domain signal for transmission; accordingly, the receiving The terminal equipment converts the time domain received signal into a time-frequency domain signal, then performs descrambling processing, and then converts it into the delayed Doppler domain; it can solve the problem of excessive PAPR caused by single tone pilot; and can realize the communication between neighboring cells and users. Randomize the single-tone pilot interference between adjacent cells to avoid excessive single-tone pilot interference between neighboring cells and users.

It should be noted that the information transmission device provided by the embodiments of the present application is a device capable of executing the above information transmission method, then all embodiments of the above information transmission method are applicable to this device, and can achieve the same or similar beneficial effects.

As shown in Figure 14, this embodiment of the present application also provides an information transmission device 1400, including:

The third processing module 1401 is used to transform the received time domain signal into a time-frequency domain signal;

The descrambling module 1402 is used to descramble the time-frequency domain signal to obtain a descrambled time-frequency domain signal;

The fourth processing module 1403 is used to perform symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.

As an optional embodiment, the device further includes:

A channel estimation module, configured to determine the pilot signal area from the delayed Doppler domain signal according to the pilot signal mapping rules of the transmitting end device, and perform channel estimation;

The signal detection module is used to determine the data signal area from the delayed Doppler domain signal according to the mapping rules of the short-term combined data signal, and perform signal detection.

As an optional embodiment, the descrambling module includes:

The first descrambling sub-module is used to dot multiply the time-frequency domain signal and the descrambling matrix to obtain the descrambled time-frequency domain signal; wherein, the descrambling matrix and the time-frequency domain signal are both A two-dimensional matrix of order M*N; M is the number of grid points in the delay domain of the delayed Doppler domain signal, and N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M, N are respectively An integer greater than 1.

As an optional embodiment, the device further includes:

The second generation module is used to generate the first matrix with M rows and N columns; where M and N are integers greater than 1 respectively;

The third generation module is used to take the conjugate of the first matrix to obtain the descrambling matrix.

As an optional embodiment, the second generation module is further used to:

According to the target parameters, N descrambling sequences of length M are generated;

Select m*N data from the M*N data of the N descrambling sequences;

Map the m*N pieces of data to an initialization matrix according to the resource element RE time-frequency resource positions that need to be descrambled, to obtain the first matrix;

As an optional embodiment, the first matrix is determined based on a descrambling sequence, the descrambling sequence is related to the target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of OFDM symbol;

Delayed Doppler domain pilot port number.

As an optional embodiment, the descrambling sequence is a ZC sequence, or a Gold sequence, or a longest linear feedback shift register M sequence.

or,

As an optional embodiment, the second generation module is further used to:

Select the first m*N data from the M*N data;

or,

From the M data in each column, select the first m data to obtain m*N data;

or,

As an optional embodiment, the descrambling module includes:

The second descrambling submodule is used to descramble the real part and the imaginary part of the time-frequency domain signal respectively, and obtain the descrambled time-frequency domain signal;

Or, it is used to descramble the time-frequency domain signal as a whole in the form of complex numbers to obtain a descrambled time-frequency domain signal.

The information transmission device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. 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 information transmission device provided by the embodiments of the present application can implement each process implemented by the method embodiments in Figures 1 to 12 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Optionally, as shown in Figure 15, this embodiment of the present application also provides a communication device 1500, which includes a processor 1501 and a memory 1502. The memory 1502 stores programs or instructions that can be run on the processor 1501, such as , when the communication device 1500 is a sending end device, when the program or instruction is executed by the processor 1501, each step of the above signal transmission method embodiment is implemented, and the corresponding steps can be achieved. same technical effect. When the communication device 1500 is a receiving end device, when the program or instruction is executed by the processor 1501, each step of the above signal transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, the details are not repeated here.

Embodiments of the present application also provide a transmitting end device, including a processor and a communication interface, wherein the processor is used to perform inverse symplectic Fourier transform ISFFT on a delayed Doppler domain signal to obtain a time-frequency domain signal; The time-frequency domain signal is scrambled to obtain a scrambled time-frequency domain signal; the scrambled time-frequency domain signal is converted into a time-domain signal, and the communication interface is used to send the time-domain signal. Alternatively, embodiments of the present application also provide a receiving end device, including a processor and a communication interface, wherein the communication interface is used to receive a time domain signal; the processor is used to transform the received time domain signal into a time-frequency domain signal; descrambling the time-frequency domain signal to obtain a descrambled time-frequency domain signal; performing symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal. It should be noted that the sending end device may be a terminal or a network side device, and the receiving end device may also be a terminal or a network side device. In the case where the sending device is a terminal or the receiving device is a terminal, the terminal embodiment corresponds to the above terminal side method embodiment, and the various implementation processes and implementation methods of the above method embodiment can be applied to this terminal embodiment. , and can achieve the same technical effect. Specifically, FIG. 16 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 1600 includes but is not limited to: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, a processor 1610, etc. At least some parts.

Those skilled in the art can understand that the terminal 1600 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 1610 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 FIG. 16 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 this embodiment of the present application, the input unit 1604 may include a graphics processing unit (GPU) 16041 and a microphone 16042. The graphics processor 16041 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 1606 may include a display panel 16061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. user The input unit 1607 includes a touch panel 16071 and at least one of other input devices 16072. Touch panel 16071, also known as touch screen. The touch panel 16071 may include two parts: a touch detection device and a touch controller. Other input devices 16072 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 1601 can transmit it to the processor 1610 for processing; in addition, the radio frequency unit 1601 can send uplink data to the network side device. Generally, the radio frequency unit 1601 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 1609 may be used to store software programs or instructions as well as various data. The memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage 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 1609 may include volatile memory or nonvolatile memory, or memory 1609 may include both volatile and nonvolatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase 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 link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 1609 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 1610 middle.

Among them, the processor 1610 is used to perform the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

The sending device converts the scrambled time-frequency domain signal into a time domain signal.

Radio frequency unit 1601, used to send the time domain signal.

Alternatively, the processor 1610 is configured to convert the received time domain signal into a time-frequency domain signal; descramble the time-frequency domain signal to obtain a descrambled time-frequency domain signal; and perform descrambling on the time-frequency domain signal. The frequency domain signal is subjected to symplectic Fourier transform (SFFT) to obtain the delayed Doppler domain signal.

Embodiments of the present application also provide a transmitting end device, including a processor and a communication interface, wherein the processor is used to perform inverse symplectic Fourier transform ISFFT on a delayed Doppler domain signal to obtain a time-frequency domain signal; The time-frequency domain signal is scrambled to obtain a scrambled time-frequency domain signal; the scrambled time-frequency domain signal is converted into a time-domain signal, and the communication interface is used to send the time-domain signal. Alternatively, embodiments of the present application also provide a receiving end device, including a processor and a communication interface, wherein the communication interface is used to receive a time domain signal; the processor is used to transform the received time domain signal into a time-frequency domain signal; descrambling the time-frequency domain signal to obtain a descrambled time-frequency domain signal; performing symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal. It should be noted that the sending end device may be a terminal or a network side device, and the receiving end device may also be a terminal or a network side device. In the case where the sending device is a network side device or the receiving device is a network side device, the network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation manner of the above method embodiment can be It is applicable 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. 17 , the network side device 1700 includes: an antenna 171 , a radio frequency device 172 , a baseband device 173 , a processor 174 and a memory 175 . The antenna 171 is connected to the radio frequency device 172 . In the uplink direction, the radio frequency device 172 receives information through the antenna 171 and sends the received information to the baseband device 173 for processing. In the downlink direction, the baseband device 173 processes the information to be sent and sends it to the radio frequency device 172. The radio frequency device 172 processes the received information and then sends it out through the antenna 171.

The method performed by the network side device in the above embodiment can be implemented in the baseband device 173, which includes a baseband processor.

The baseband device 173 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 176, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 1700 in the embodiment of the present application also includes: instructions or programs stored in the memory 175 and executable on the processor 174. The processor 174 calls the instructions or programs in the memory 175 to execute the steps shown in Figure 13 or 14. It shows the execution method of each module and achieves the same technical effect. To avoid duplication, it will not be repeated here.

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above signal transmission method embodiment is implemented, and the same can be achieved. The technical effects will not be repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further 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 transmission method embodiment. Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.

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

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above signal transmission method embodiment. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

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

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of this disclosure.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in various embodiments of the present disclosure can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into a single processing unit. Yuanzhong.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by controlling relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. During execution, the process may include the processes of the embodiments of each of the above methods. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that 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, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, 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 essentially or the part that contributes to the existing technology can be used as a computer software product. Reflected in the form, the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes a number of instructions to enable a terminal (which can be a mobile phone, computer, server, air conditioner, or network equipment etc.) to perform 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 signal transmission method including:

The transmitting end device performs the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

The sending device performs scrambling on the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

The sending device converts the scrambled time-frequency domain signal into a time domain signal;

The sending end device sends the time domain signal.
The method according to claim 1, wherein the sending end device performs scrambling on the time-frequency domain signal to obtain a scrambled time-frequency domain signal, including:

The sending end device performs dot multiplication of the time-frequency domain signal and the scrambling matrix to obtain a scrambled time-frequency domain signal; wherein the scrambling matrix and the time-frequency domain signal are both of M*N order is a two-dimensional matrix; M is the number of grid points in the delay domain of the delayed Doppler domain signal, and N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M and N are integers greater than 1 respectively. .
The method of claim 2, further comprising:

The sending device generates N scrambling sequences of length M according to the target parameters;

The sending device selects m*N data from the M*N data of the N scrambling sequences;

The sending end device maps the m*N pieces of data to an initialization matrix according to the time-frequency resource positions of the resource elements RE that need to be scrambled, to obtain the scrambling matrix;

Wherein, the initialization matrix is a two-dimensional matrix with M rows and N columns, and the contents of the initialization matrix are all 1; m is an integer greater than 1, and m is less than or equal to M.
The method according to claim 2 or 3, wherein the scrambling matrix is determined based on a scrambling sequence, the scrambling sequence is related to a target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of OFDM symbol;

Delayed Doppler domain pilot port number.
The method according to claim 3, wherein the scrambling sequence is a ZC sequence, or a Gold sequence, or a longest linear feedback shift register M sequence.
The method of claim 5, wherein the target parameters are associated with parameters required to generate the scrambling sequence; wherein,

In the case where the scrambling sequence is a ZC sequence, the parameters required to generate the ZC sequence include: root index and cyclic shift value;

or,

In the case where the scrambling sequence is a Gold sequence, the parameters required to generate the Gold sequence include: initialization state, or a cyclic shift combination of two M sequences;

or,

When the scrambling sequence is an M sequence, the parameters required to generate the M sequence include: shift value, initialization state, primitive polynomial, and interception position of the shift register output.
The method according to claim 5 or 6, wherein when the scrambling sequence is a Gold sequence or an M sequence, the sending device generates N scrambling sequences of length M according to target parameters, including :

The sending end device obtains the parameters associated with the target parameters required to generate the scrambling sequence;

The sending device generates corresponding pseudo-random bits according to the parameters required to generate the scrambling sequence;

The sending device modulates the pseudo-random bits to generate N scrambling sequences of length M.
The method according to claim 3, wherein the sending device selects m*N data from the M*N data of the N scrambling sequences, including:

The sending device selects the first m*N data from the M*N data;

or,

The sending device selects the first m data from the M data in each column to obtain m*N data;

or,

The sending device selects m*N pieces of data according to the time-frequency resource locations of the REs that need to be scrambled.
The method of claim 1, further comprising:

The transmitting end device maps the modulated signal to the data signal area of the delayed Doppler domain, and maps the pilot signal to the pilot signal area of the delayed Doppler domain to obtain the delayed Doppler domain signal.
The method according to any one of claims 1 to 9, wherein before the sending device performs scrambling on the time-frequency domain signal, the method further includes:

The sending end device determines that all REs or part of the REs of the time-frequency domain signal need to be scrambled; the part of the REs is determined based on first information, and the first information includes:

The index value of the preset scrambling mode; different scrambling modes correspond to different REs that need to be scrambled;

The starting position of the RE that needs to be scrambled is separated from the RE;

The end position of the RE to be scrambled is separated from the RE.
The method according to any one of claims 1 to 9, wherein the sending end device performs scrambling processing on the time-frequency domain signal to obtain a scrambled time-frequency domain signal, including:

The sending device performs scrambling processing on the real part and the imaginary part of the time-frequency domain signal, respectively, to obtain a scrambled time-frequency domain signal;

or,

The sending end device performs overall scrambling on the time-frequency domain signal in the form of a complex number to obtain a scrambled time-frequency domain signal.
A signal transmission method including:

The receiving device converts the received time domain signal into a time-frequency domain signal;

The receiving end device descrambles the time-frequency domain signal to obtain a descrambled time-frequency domain signal;

The receiving end device performs a symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.
The method of claim 12, further comprising:

The receiving end device determines the pilot signal area from the delayed Doppler domain signal according to the pilot signal mapping rule of the transmitting end device and performs channel estimation;

The receiving end device determines the data signal area from the delayed Doppler domain signal according to the mapping rules of the transmitted short-term combined data signal, and performs signal detection.
The method according to claim 12, wherein the receiving end device performs the time-frequency domain The signal is descrambled to obtain the descrambled time-frequency domain signal, including:

The receiving end device performs dot multiplication of the time-frequency domain signal and the descrambling matrix to obtain a descrambled time-frequency domain signal; wherein, the descrambling matrix and the time-frequency domain signal are both of order M*N is a two-dimensional matrix; M is the number of grid points in the delay domain of the delayed Doppler domain signal, and N is the number of grid points in the Doppler domain of the delayed Doppler domain signal; M and N are integers greater than 1 respectively. .
The method of claim 14, wherein the method further includes:

The receiving end device generates a first matrix with M rows and N columns;

The receiving end device takes the conjugate of the first matrix to obtain the descrambling matrix.
The method according to claim 15, wherein the receiving end device generates a first matrix of M rows and N columns, including:

The receiving end device generates descrambling sequences with a dimension of N and a length of M according to the target parameters;

The receiving end device selects m*N data from the M*N data of the N descrambling sequences;

The receiving end device maps the m*N pieces of data to an initialization matrix according to the resource element RE time-frequency resource positions that need to be descrambled, to obtain the first matrix;

Wherein, the initialization matrix is a two-dimensional matrix with M rows and N columns, and the contents of the initialization matrix are all 1; m is an integer greater than 1, and m is less than or equal to M.
The method of claim 16, wherein the first matrix is determined based on a descrambling sequence, the descrambling sequence is related to the target parameter, and the target parameter includes at least one of the following:

community identification;

User-specific identification;

timeslot number;

System frame number;

Symbol index of OFDM symbol;

Delayed Doppler domain pilot port number.
The method according to claim 16, wherein the descrambling sequence is a ZC sequence, or a Gold sequence, or a longest linear feedback shift register M sequence.
The method of claim 17, wherein the target parameters are associated with parameters required to generate the descrambling sequence; wherein,

In the case where the descrambling sequence is a ZC sequence, the parameters required to generate the ZC sequence include: root index and cyclic shift value;

or,

In the case where the descrambling sequence is a Gold sequence, the parameters required to generate the Gold sequence include: initialization state, or a cyclic shift combination of two M sequences;

or,

When the descrambling sequence is an M sequence, the parameters required to generate the M sequence include: shift value, initialization state, primitive polynomial, and interception position of the shift register output.
The method according to claim 16, wherein the receiving device selects m*N data from the M*N columns of data of the N descrambling sequences, including:

The receiving device selects the first m*N data from the M*N data;

or,

The receiving device selects the first m data from the M data in each column to obtain m*N data;

or,

The receiving end device selects m*N data according to the time-frequency resource position of the RE that needs to be scrambled.
The method according to any one of claims 12 to 20, wherein the receiving end device descrambles the time-frequency domain signal to obtain a descrambled time-frequency domain signal, including:

The receiving end device descrambles the real part and the imaginary part of the time-frequency domain signal respectively to obtain a descrambled time-frequency domain signal;

or,

The receiving end device descrambles the time-frequency domain signal as a whole in the form of complex numbers to obtain a descrambled time-frequency domain signal.
An information transmission device including;

The first processing module is used to perform the inverse symplectic Fourier transform ISFFT on the delayed Doppler domain signal to obtain the time-frequency domain signal;

A scrambling module, used to scramble the time-frequency domain signal to obtain a scrambled time-frequency domain signal;

The second processing module is used to transform the scrambled time-frequency domain signal into a time domain signal;

The first sending module is used to send the time domain signal.
A sending end device, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, any one of claims 1 to 11 is implemented. The steps of the signal transmission method described in the item.
An information transmission device including:

The third processing module is used to transform the received time domain signal into a time-frequency domain signal;

A descrambling module, used to descramble the time-frequency domain signal and obtain a descrambled time-frequency domain signal;

The fourth processing module is used to perform symplectic Fourier transform (SFFT) on the descrambled time-frequency domain signal to obtain a delayed Doppler domain signal.
A receiving end device, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, any one of claims 12 to 21 is implemented. The steps of the signal processing method described in the item.
A readable storage medium, which stores programs or instructions. When the program or instructions are executed by a processor, the signal processing method as described in any one of claims 1-11 is implemented, or the signal processing method as claimed in any one of claims 1-11 is implemented. The steps of the signal processing method according to any one of claims 12 to 21.