WO2023061491A1 - Information transmission method and apparatus, and sending end - Google Patents

Abstract

The present application is applied to the technical field of communications. Disclosed are an information transmission method and apparatus, and a sending end. The method comprises: a sending end respectively performing, on L antennas, a cyclic shift on delay Doppler information, so as to acquire first information corresponding to each antenna; and the sending end respectively sending the first information by means of the L antennas, wherein L is an integer greater than or equal to 1.

Description

Information transmission method, device and sending end

Cross References to Related Applications

This application claims priority to Chinese Patent Application No. 202111205777.8 filed in China on October 15, 2021 and Chinese Patent Application No. 202111210746.1 filed in China on October 18, 2021, the entire contents of which are hereby incorporated by reference .

technical field

The present application belongs to the communication field, and in particular relates to an information transmission method, device and sending end.

Background technique

At present, there is no mature solution for the multi-antenna technology in the delay-Doppler domain. Due to the two-dimensional convolution relationship between the delay-Doppler domain information and the channel, the multi-antenna scheme in the traditional Orthogonal Frequency Division Multiplexing (OFDM) system cannot be directly applied in the delay-Doppler domain. In addition, existing multi-antenna transmission schemes in the delayed Doppler domain still have problems such as high precoding complexity and large amount of channel information feedback.

Contents of the invention

Embodiments of the present application provide an information transmission method, device, and sending end, which can solve the problems of high precoding complexity and large amount of channel information feedback in the existing multi-antenna transmission scheme in the delayed Doppler domain.

In the first aspect, an information transmission method is provided, including:

The transmitting end cyclically shifts the delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna;

The sending end sends the first information through the L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

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

An acquisition module, configured to cyclically shift the delayed Doppler information on the L antennas to acquire the first information corresponding to each antenna;

a sending module, configured to send the first information through the L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

In the third aspect, a sending end is provided, including a processor, a memory, and a program or instruction stored in the memory and operable on the processor, and the program or instruction is implemented when executed by the processor. The steps of the method as described in the first aspect.

In a fourth aspect, a sending end is provided, including a processor and a communication interface, wherein the processor is configured to cyclically shift the delayed Doppler information on the L antennas respectively, and obtain the first corresponding to each antenna. information; the communication interface is used to send the first information through the L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

According to a fifth aspect, a readable storage medium is provided, and a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method according to the first aspect are implemented.

A sixth aspect provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect A step of.

In a seventh aspect, a computer program product is provided, the computer program product is stored in a non-transitory storage medium, and the computer program product is executed by at least one processor to implement the method as described in the first aspect step.

In an eighth aspect, there is provided a communication device configured to perform the steps of the method described in the first aspect.

In the embodiment of the present application, the first information corresponding to each antenna is obtained by cyclically shifting the delayed Doppler information on the L antennas, and the first information is sent through the L antennas respectively, so that It can reduce the complexity of precoding, reduce the amount of channel information feedback, and at the same time can obtain the diversity gain in the delay Doppler domain.

Description of drawings

FIG. 1 is a block diagram of a wireless communication system to which an embodiment of the present application is applicable;

FIG. 2 is a schematic flow diagram of an information transmission method in an embodiment of the present application;

Fig. 3 is a schematic diagram of a cyclic shift along a delay direction;

4 is a schematic diagram of a cyclic shift along the Doppler direction;

5 is a schematic diagram of fixed pilots and first guard interval positions when cyclically shifting along the delay direction;

Fig. 6 is a schematic diagram of changes in pilot frequency and first guard interval position with cyclic shift when cyclically shifted along the delay direction;

Fig. 7 is a schematic diagram of fixed pilots and first guard interval positions when cyclically shifting along the Doppler direction;

Fig. 8 is a schematic diagram of changes in pilot and first guard interval positions with cyclic shift when cyclically shifted along the Doppler direction;

FIG. 9 is a block diagram of a communication flow in an embodiment of the present application;

FIG. 10 is a schematic block diagram of an information transmission device according to an embodiment of the present application;

FIG. 11 is one of the structural block diagrams of the sending end of the embodiment of the present application;

FIG. 12 is the second structural block diagram of the sending end of the embodiment of the present application;

Fig. 13 is a structural block diagram of a communication device according to an embodiment of the present application.

Detailed ways

Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), Evolved Node B (eNB), Wireless Local Area Network (WLAN) access point

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the 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 them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

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

Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can 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), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device (Vehicle User Equipment, VUE), pedestrian terminal (Pedestrian User Equipment, PUE) and other terminal-side equipment, wearable devices include: smart watches, bracelets, earphones, glasses, 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 be a base station or a core network, where a base station may be called a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service Basic Service Set (BSS), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, Wireless Local Area Network (WLAN) ) access point, WiFi node, Transmitting Receiving Point (Transmitting Receiving 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 should be noted that , in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

The relevant technologies involved in this application are described as follows:

Multi-antenna technical background in Orthogonal Time Frequency Space (OTFS):

At present, the multi-antenna transmission scheme in the delayed Doppler domain is still in the research stage, mainly including two aspects of an open-loop scheme and a closed-loop scheme. The open-loop solution refers to a solution with channel information feedback, and the transmitter can perform operations such as precoding according to the fed back channel information. The closed-loop solution refers to a solution without channel information feedback, and the transmitter directly operates on symbols. Among them, the closed-loop transmission scheme:

(1) Scheme based on analog beamforming:

By simulating beamforming, different users are distinguished in the angular domain. Only single-stream transmission per user can be realized, because the resolution in the angle domain can only be used to distinguish users, and multi-streams also need to be distinguished by digital precoding.

(2) Spatial multiplexing scheme (digital precoding)

First, based on the vectorized representation in the delay-Doppler domain, the channels of multiple transceiver antenna pairs are concatenated into a high-dimensional equivalent channel matrix. Based on this high-dimensional equivalent channel matrix, digital precoding is performed to distinguish multi-stream or multi-user data. However, the disadvantage of this solution is that the dimension of the equivalent multiple input multiple output (MIMO) matrix is very large, and the complexity of precoding is very high.

(3) Tomlinson-Harashima Precoding (Tomlinson-Harashima Precoding, THP) scheme

Assuming that the transmitter has obtained the channel state information through feedback, the equivalent channel matrix in the delay-Doppler domain is decomposed, so as to eliminate the interference between all single symbols on different layers. However, this scheme requires serial operations on each transmitted symbol, and the computational complexity is high.

For fast time-varying systems, the feedback of channel information will increase the delay of the sending end, resulting in a large difference between the current channel state and the feedback information, resulting in a mismatch between the sending end's transmission scheme and the current channel state, thus losing the meaning of channel feedback . Currently, there are several open-loop OTFS multi-antenna solutions:

(1) Transmit diversity scheme

Short-time coding is performed at the granularity of multiple consecutive delayed Doppler frames to obtain diversity gain. The premise of this scheme is to assume that the channels of consecutive delayed Doppler frames are the same. However, due to the changing characteristics of the channel and the large granularity of the delayed Doppler frame, the channels of multiple consecutive delayed Doppler frames are actually different, so it is not suitable for direct space-time coding.

(2) Uplink auxiliary transmission scheme

Utilizing the angle, delay and Doppler dissimilarity between the uplink and downlink, the angle, delay and Doppler information of each user is estimated through the uplink pilot, and the signals of different users are detected at different angles. Finally, based on the estimated angular direction of each user, respective beamforming vectors are formed to avoid interference among multiple users. However, this scheme requires the mutuality of uplink and downlink channels and cannot realize multi-stream transmission of a single user.

At present, there is no engineering-realizable multi-antenna transmission scheme in the delay-Doppler domain. This application proposes a multi-delay Doppler domain information cyclic shift transmission method, which is an open-loop multi-antenna transmission scheme under single-layer data. Doppler domain is cyclically shifted to obtain diversity gain in delay Doppler domain.

The information transmission method, device, and sending end 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, the embodiment of this application provides an information transmission method, including:

In step 201, the transmitting end cyclically shifts the delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna;

It should be noted that L is an integer greater than or equal to 1.

It should be noted here that this application is mainly aimed at how to realize information transmission when the sending end is the sending end with multiple antennas. That is to say, in specific applications, the number of antennas at the sending end is usually greater than or equal to 2.

Step 202, the sending end sends the first information through L antennas respectively.

It should be noted that in the embodiment of the present application, the sending end modulates the information (symbol) to be sent and carries it in the delayed Doppler domain to obtain the delayed Doppler information. Since there are L antennas to send information, it corresponds to For each antenna, the delayed Doppler information is cyclically shifted to obtain the first information corresponding to each antenna, and then each antenna is used to convert the first information corresponding to it (it should be noted that, although both are called the first information One information, but for each antenna, the first information corresponding to different antennas is not the same) to the receiving end, for example, the sending end uses two antennas to send information, then for antenna 1, the delay Doppler Doppler information is cyclically shifted to obtain information 1. For antenna 2, the delayed Doppler information is cyclically shifted to obtain information 2, and then information 1 is sent through antenna 1, and information 2 is sent through antenna 2; The delayed Doppler frame is cyclically shifted in the delay domain or the Doppler domain to obtain the diversity gain in the delayed Doppler domain, reduce the precoding complexity, and reduce the amount of channel information feedback.

It should be further noted that the cyclic shift mentioned in the embodiment of the present application includes at least one of the following:

Cyclic shift in delay direction;

Cyclic shift in Doppler direction.

The different cyclic shift modes are described in detail below respectively.

Case 1, the cyclic shift includes a cyclic shift along the delay direction

Specifically, in this case, the specific implementation of step 201 includes the following one:

A11. On the l-th antenna, place the last d _l bits of the delayed Doppler information along the delay direction on the d _l bits of the head, and move the remaining Md _l bits backward by d _l bits in turn;

A12. On the lth antenna, place the first d _l bits of the delayed Doppler information on the tail d _l bits along the delay direction, and move the remaining Md _l bits forward in turn by d _l bits;

It should be noted that d _l is the number of shifts along the delay direction on the lth antenna, d _l is greater than or equal to 1, and M is the total number of indexes of the delay Doppler information in the delay direction, that is, the frequency domain sub The number of carriers can also be regarded as the total number of grids of delay Doppler information in the delay direction, l=1, 2, . . . , L.

What needs to be explained here is that the determination method of d _l is:

Determine according to the formula: d _l = (l-1)l _max ;

Wherein, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, and Δf is the subcarrier spacing in the time-frequency domain.

That is to say, first determine the number of shifts along the delay direction on each antenna, and then perform cyclic shifts according to the number of shifts. For example, the number of shifts along the delay direction finally determined on antenna 1 is 1 bit, the number of shifts along the delay direction finally determined on antenna 2 is 2 bits, then the last bit of delayed Doppler information along the delay direction can be placed on the head bit on antenna 1, and the rest The M-1 bits are moved backward by 1 bit in turn, and the last 2 bits of the delayed Doppler information along the delay direction are placed on the two bits of the head on the antenna 2, and the remaining M-2 bits are moved backward by 2 bits in turn; It is also possible to place the first bit of the delayed Doppler information on the delay direction on the antenna 1 on the last bit, and the remaining M-1 bits are moved backward and forward by 1 bit, and the delayed Doppler information on the antenna 2 The first 2 bits of the information along the delay direction are placed on the two bits at the end, and the remaining M-2 bits are moved forward by 2 bits in sequence; the delay Doppler information can also be placed on the last 1 bit along the delay direction on antenna 1 On one bit of the head, the remaining M-1 bits are moved backward one bit in turn, and the first two bits of the delayed Doppler information along the delay direction are placed on the two bits at the tail on the antenna 2, and the remaining M -2 bits move forward by 2 bits sequentially; it is also possible to place the first bit of the delayed Doppler information on the delay direction on the antenna 1 on the last bit, and the remaining M-1 bits move forward by 1 bit sequentially, On the antenna 2, the last 2 bits of the delayed Doppler information along the delay direction are placed on the two bits of the head, and the remaining M-2 bits are sequentially moved backward by 2 bits.

For example, taking 3 antennas at the transmitting end as an example to give the result of cyclic shift along the delay direction, the delayed Doppler information of each antenna after cyclic shift is shown in FIG. 3 .

Case 2: The cyclic shift includes a cyclic shift along the Doppler direction

Specifically, in this case, the specific implementation of step 201 includes the following one:

B11. On the first antenna, place the last p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit of the head, and move the remaining Np _l bits backwards by p _l bits in turn;

B12. On the lth antenna, place the front p _l bits of the delayed Doppler information along the Doppler direction on the p _l bits at the tail, and move the remaining Np _l bits forward in turn by p _l bits;

It should be noted that p _l is the number of shifts along the Doppler direction on the l-th antenna, p _l is greater than or equal to 1, and N is the total number of indexes of the delayed Doppler information in the Doppler direction, that is, The number of symbols in the field can also be regarded as the total number of grids of the delayed Doppler information in the Doppler direction, l=1, 2, . . . , L.

What needs to be explained here is that the determination method of p _l is:

Determine according to the formula: p _l = (l-1)k _max ;

Where k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, and Δf is the subcarrier spacing in the time-frequency domain.

That is to say, first determine the number of shifts along the Doppler direction on each antenna, and then perform a cyclic shift according to the number of shifts, for example, the final determined shift along the Doppler direction on antenna 1 The number is 1 bit, and the number of shifts along the Doppler direction finally determined on antenna 2 is 2 bits, then the last bit of delayed Doppler information along the Doppler direction can be placed in the header on antenna 1 On one bit of the head, the remaining N-1 bits are moved backward by one bit, and the last two bits of the delayed Doppler information along the Doppler direction are placed on the two bits of the head on the antenna 2, and the remaining N -2 bits move backward by 2 bits in sequence; you can also place the first bit of the delayed Doppler information on the Doppler direction on the antenna 1 on the last bit, and the remaining N-1 bits move forward by 1 in sequence position, place the first 2 bits of the delayed Doppler information along the Doppler direction on the two bits at the tail on antenna 2, and the remaining N-2 bits move forward by 2 bits sequentially; The last 1 bit of the delayed Doppler information along the Doppler direction is placed on the 1 bit of the head, and the remaining N-1 bits are moved backward by 1 bit sequentially, and the delayed Doppler information is placed along the Doppler direction on antenna 2. The first 2 bits of the direction are placed on the two bits at the end, and the remaining N-2 bits are moved forward by 2 bits in sequence; the first bit of the delayed Doppler information along the Doppler direction can also be placed on the antenna 1 On the one bit at the tail, the remaining N-1 bits are moved forward one bit in turn, and the last two bits of the delayed Doppler information along the Doppler direction are placed on the two bits at the head on antenna 2, and the remaining N -2 bits move backward 2 bits in turn.

For example, taking 3 antennas at the transmitting end as an example to give the result of cyclic shift along the Doppler direction, the delayed Doppler information of each antenna after cyclic shift is shown in FIG. 4 .

Case 3: The cyclic shift includes a cyclic shift along the delay direction and a cyclic shift along the Doppler direction

Specifically, in this case, the specific implementation of step 201 includes the following one:

C11. On the first antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the delay direction;

C12. On the first antenna, the delayed Doppler information is cyclically shifted along the delay direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the Doppler direction;

It should be noted that, in the case where the cyclic shift in the delay direction and the Doppler direction is required on each antenna, the cyclic shift in the delay direction can be performed first, and then the cyclic shift in the Doppler direction can be performed. It is also possible to perform the cyclic shift in the Doppler direction first, and then perform the cyclic shift in the delay direction; specifically, the manner of performing the cyclic shift in the delay direction and the Doppler direction can refer to the above-mentioned case 1 and The implementation manner of the second case will not be repeated here.

It should further be noted that the delayed Doppler domain in the delayed Doppler information is set with a first guard interval, and pilot frequency is set in the first guard interval, that is to say, the setting of the first guard interval It is to prevent the problem of inaccurate channel estimation caused by mutual interference between the pilot frequency and the data.

Specifically, the location of the first guard interval may or may not change with the cyclic shift. The setting of the size of the first guard interval in different cases will be described below.

Case 1: The location of the first guard interval changes with the cyclic shift

Specifically, in this case, the size of the first guard interval satisfies at least one of the following:

D11. In the case of cyclic shifting along the delay direction, the width of the first guard interval in the delay domain is greater than or equal to 2(l _max +d _max )+1, and the width in the Doppler domain is greater than or equal to 4k _max +1;

It should be noted that d _max =max{d ₁ , d ₂ ,...d _L }

D12. In the case of cyclic shifting along the Doppler direction, the width of the first guard interval in the delay domain is greater than or equal to 2l _max +1, and the width in the Doppler domain is greater than or equal to 4(k _max + p _max )+1;

It should be noted that p _max =max{p ₁ , p ₂ , . . . p _L }.

Case 2: The position of the first guard interval does not change with the cyclic shift

Specifically, in this case, the size of the first guard interval satisfies:

E11. The width in the delay domain is greater than or equal to 2l _max +1, or the width in the delay domain is greater than or equal to (L+1)l _max +L;

E12. The width of the Doppler domain is greater than or equal to 4k _max +1.

It should be further noted that the location of the first guard interval may be specified by the protocol, or may be set by the sender.

Optionally, in the case that the location of the first guard interval is set by the sending end, the sending end sends the location of the first guard interval to the receiving end through target information.

Optionally, the target information includes at least one of the following:

F101, radio resource control (Radio Resource Control, RRC) signaling;

F102, Layer 1 signaling of a physical downlink control channel (Physical downlink control channel, PDCCH);

F103, the information carried on the physical downlink shared channel (Physical downlink shared channel, PDSCH);

F104, the signaling of the medium access control layer control unit (Medium Access Control Control Element, MAC CE);

F105, system information block (System Information Block, SIB);

F106, Layer 1 signaling of the Physical Uplink Control Channel (PUCCH);

F107, Physical Random Access Channel (Physical Random Access Channel, PRACH) message 1 (Message 1, MSG 1);

F108, message 2 of PRACH (MSG 2);

F109, PRACH message three (MSG 3);

F110, message four (MSG 4) of PRACH;

F111, message A (MSG A) of PRACH;

Message B (MSG B) of F112, PRACH;

F113, the information carried on the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH);

F114, Xn interface signaling;

F115, PC5 interface signaling;

F116. Direct link interface signaling (side link interface signaling).

It should be further noted that the location of the pilot may not change with the cyclic shift, or may change with the cyclic shift.

Further, the setting manner of the pilot includes: at least one of an impulse pilot and a sequence pilot.

Optionally, the pilot information corresponding to the pilot may be stipulated by the protocol, or may be set by the sending end. Specifically, the pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot Frequency value.

Optionally, in the case that the pilot information corresponding to the pilot is set by the sending end, the sending end sends the pilot information corresponding to the pilot to the receiving end through target information.

For example, taking the cyclic shift along the delay direction as an example, two schemes for placing the pilot and the first guard interval are given.

Solution 1. Taking 3 antennas at the transmitting end as an example, if the positions of the pilot frequency and the first guard interval do not change with the cyclic shift, then the delayed Doppler information of each antenna is shown in FIG. 5 .

In order to prevent data from interfering with pilots and pilots between different antennas, the first guard interval is set at 2k _max on both sides of the pilot along the Doppler direction, within the l _max grid point on both sides of the pilot along the delay direction, and different antennas The difference between the delay positions of pilots is l _max .

Solution 2: Taking 3 antennas at the transmitting end as an example, if the positions of the pilot frequency and the first guard interval change with the cyclic shift, the delayed Doppler information of each antenna is shown in Figure 6. It should be noted that, In this case, the pilots corresponding to different antennas in the delayed Doppler domain of the delayed Doppler information may be the same or different. FIG. 6 shows that the pilots on each antenna are different.

In order to prevent data from interfering with pilots and pilots between different antennas, the first guard interval is set at l _max +d _max on both sides of the pilot along the delay direction, and 2k _max grid points on both sides of the pilot along the Doppler direction Inside. where d _max =max{d ₁ ,d ₂ ,...,d _L }, in this example d _max =d ₃ .

Taking the cyclic shift along the Doppler direction as an example, two schemes for placing the pilot frequency and the first guard interval are given.

Solution 1. Taking 3 antennas at the transmitting end as an example, if the positions of the pilot frequency and the first guard interval do not change with the cyclic shift, the delayed Doppler information of each antenna is shown in Figure 7 below:

In order to prevent data from interfering with pilots and pilots between different antennas, the first guard interval is set at 2k _max on both sides of the pilot along the Doppler direction, within the l _max grid point on both sides of the pilot along the delay direction, and different antennas The difference between the delay positions of pilots is l _max .

Solution 2. Taking the 2 antennas of the transmitting end as an example, if the positions of the pilot frequency and the first guard interval change with the cyclic shift, the delayed Doppler information of each antenna is shown in Figure 8 below. It should be noted that, In this case, the pilots corresponding to different antennas in the delayed Doppler domain of the delayed Doppler information may be the same or different. FIG. 8 shows that the pilots on each antenna are different.

In order to prevent data from interfering with pilots and pilots between different antennas, the first guard interval is set at l _max on both sides of the pilot along the delay direction, and 2(k _max +p _max on both sides of the pilot along the Doppler direction ) within the grid. where p _max =max{p ₁ ,p ₂ ,...,p _L }, in this example, p _max =p ₂ .

It should also be noted that an optional implementation of step 201 is:

The transmitting end multiplies the delayed Doppler information and the phase offset corresponding to the antennas on the L antennas respectively, to obtain the first delayed Doppler information corresponding to each antenna;

The transmitting end respectively performs cyclic shift on the first delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna.

It should be noted that when setting the phase offset for the antenna, before performing the cyclic shift processing on the delayed Doppler information, it is necessary to multiply the delayed Doppler information with the phase offset corresponding to the antenna, and then perform Cyclic shift, it should be noted that because there are multiple antennas at the sending end, some of the antennas in the multiple antennas may have phase offsets, and the other part of the antennas may not have phase offsets; and the phase offsets of different antennas can be the same It can also be different.

Optionally, the phase offset corresponding to each antenna may be stipulated in a protocol, or set by the sending end.

Optionally, in the case that the phase offset corresponding to each antenna is set by the sending end, the sending end sends the phase offset corresponding to each antenna to the receiving end through target information.

Optionally, in order to prevent the currently sent information from interfering with other information, a second guard interval may be set in the Doppler domain of the delayed Doppler information in the embodiment of the present application;

Wherein, the second guard interval is set in at least one of the following positions:

H11, the preset delay domain position;

H12, the preset Doppler domain position.

It should be further noted that the second guard interval satisfies at least one of the following:

H21, configuration is all 0;

H22, cyclic prefix;

H23, cyclic suffix.

Optionally, the location of the second guard interval may be specified by the protocol, or may be set by the sender; when the location of the second guard interval is set by the sender, the sender may pass the target information Send the location of the second guard interval to the receiving end.

What needs to be explained here is that because the final antenna sends a time-domain signal, when sending the first information, the sending end needs to convert the delayed Doppler information into a time-domain signal first, and then send it. , the implementation of step 202 in the embodiment of the present application is as follows:

The sending end transforms the first information into the time-frequency domain to obtain the second information;

The sending end transforms the second information into a time domain to obtain third information;

The sending end sends the third information through the L antennas respectively.

Optionally, a second guard interval is set in the second information;

Wherein, the second guard interval is set in at least one of the following positions:

H21, preset time domain position;

H22, a preset frequency domain position.

It should be noted that the second guard interval can be set in the Doppler domain in the delayed Doppler information, or can be set in the second information. Usually, it only needs to be set in the Doppler domain and the second information One of them only needs to increase the second guard interval.

It should also be noted that, usually, the shift information of the cyclic shift also needs to be known by both the sending end and the receiving end. Specifically, the shift information of the cyclic shift can be stipulated by the protocol, or by the terminal setting, specifically, the shift information includes: at least one of the number of shifts along the delay direction and the number of shifts along the Doppler direction.

Optionally, in the case that the shift information is set by the sending end, the sending end sends the shift information to the receiving end through target information.

It should further be explained that if the shift information of the cyclic shift, the location of the first guard interval, the pilot information corresponding to the pilot, the phase offset corresponding to each antenna, and the location of the second guard interval When there are at least two items in is notified by the sender, the sender can notify these information through the same signaling, for example, notify the shift information of the cyclic shift and the location of the second guard interval through the SIB; optionally, The sending end may also notify the information through different signaling, for example, notify the shift information of the cyclic shift through MSG2, and notify the location of the second guard interval through MSG4.

It should be noted here that the sending end may be a terminal, and the receiving end may also be a terminal; or the sending end may be a network-side device, and the receiving end may be a terminal; or, the sending end may be a terminal, and the receiving end may be a network-side device.

The communication process corresponding to the embodiment of the present application is shown in FIG. 9 . The delayed Doppler information X is cyclically shifted corresponding to each antenna to obtain the first information (X _l ) corresponding to each antenna, and then the first information Add the pilot and the first guard interval in the delayed Doppler domain, then perform OTFS modulation on the first information, add the second guard interval in the time domain, and finally send the transformed delayed Doppler information to the receiver through the antenna end.

It should also be noted that this application can also be extended to other transform domains other than OTFS (such as based on Walsh-Hadmard Transform (WHT) transform, based on discrete cosine transform (Discrete Cosine Transform, DCT) transmission technology The cyclic shift operation of the delayed Doppler domain involved in the present application is also the same cyclic shift operation in the above-mentioned other transform domains; the cyclic shift operation mentioned in this application can also be carried out in the delay time domain; In this embodiment, the effect of cyclic shift can be equivalently realized by adding a cyclic prefix or a cyclic suffix in the delayed Doppler domain.

It should be noted that the embodiment of the present application proposes a transmission scheme in which the delayed Doppler domain is cyclically shifted, and the cyclic shift operation is performed in the delay domain or the Doppler domain, wherein the cyclic shift in the delay domain is the maximum delay Extension, the cyclic shift in the Doppler domain is the maximum Doppler extension, and the shifted transmission scheme realizes delay diversity or Doppler diversity; the delayed Doppler domain cyclic shift transmission of the embodiment of the present application Compared with the existing delayed Doppler domain transmission scheme, the scheme does not need to add additional overhead, and the operation is simple. It only needs to perform a cyclic shift operation on the delayed Doppler frame, which is more engineering-realizable in practice.

It should be noted that, the information transmission method provided in the embodiment of the present application may be executed by an information transmission device, or a control module in the information transmission device for executing the information transmission method. In the embodiment of the present application, the information transmission device provided in the embodiment of the present application is described by taking the information transmission device executing the information transmission method as an example.

As shown in Figure 10, the embodiment of the present application provides an information transmission device 1000, which is applied to the sending end, including:

The acquisition module 1001 is configured to perform cyclic shift on the L antennas respectively to delay Doppler information, and acquire the first information corresponding to each antenna;

A sending module 1002, configured to send the first information through the L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

Optionally, the cyclic shift includes at least one of the following:

Cyclic shift in delay direction;

Cyclic shift in Doppler direction.

Optionally, when the cyclic shift includes a cyclic shift along a delay direction, the obtaining module 1001 is configured to:

On the l-th antenna, place the last d _l bits of the delayed Doppler information along the delay direction on the d _l bits of the head, and the remaining Md _l bits are sequentially moved backward by d _l bits; or

On the l-th antenna, place the first d _{l bits of the delayed Doppler information on the tail d l bits} along the delay direction, and move the remaining Md _l bits forward in turn by d _l bits;

Among them, d _l is the number of shifts along the delay direction on the lth antenna, d _l is greater than or equal to 1, M is the total number of indexes of the delay Doppler information in the delay direction, l=1, 2, ..., L .

Optionally, the determination method of d _l is:

Determine according to the formula: d _l = (l-1)l _max ;

Wherein, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, and Δf is the subcarrier spacing in the time-frequency domain.

Optionally, when the cyclic shift includes a cyclic shift along the Doppler direction, the obtaining module 1001 is configured to:

On the l-th antenna, place the last p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit of the head, and the remaining Np _l bits are sequentially moved backward by p _l bits; or

On the l-th antenna, place the _front p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit at the tail, and move the remaining Np _l bits forward in sequence;

Among them, p _l is the number of shifts along the Doppler direction on the lth antenna, p _l is greater than or equal to 1, N is the total number of indexes of the delayed Doppler information in the Doppler direction, l=1,2 ,…, L.

Optionally, the determination method of p _l is:

Determine according to the formula: p _l = (l-1)k _max ;

Where k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, and Δf is the subcarrier spacing in the time-frequency domain.

Optionally, when the cyclic shift includes a cyclic shift along a delay direction and a cyclic shift along a Doppler direction, the obtaining module 1001 is configured to:

On the first antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the delay direction; or

On the first antenna, the delayed Doppler information is cyclically shifted along the delay direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the Doppler direction;

Wherein, l=1, 2, . . . , L.

Optionally, the delay Doppler field in the delay Doppler information is set with a first guard interval.

Optionally, in the case where the position of the first guard interval changes with cyclic shift, the size of the first guard interval satisfies at least one of the following:

In the case of cyclic shifting along the delay direction, the width of the first guard interval in the delay domain is greater than or equal to 2(l _max +d _max )+1, and the width in the Doppler domain is greater than or equal to 4k _max + 1;

In the case of cyclic shifting along the Doppler direction, the width of the first guard interval in the delay domain is greater than or equal to 2l _max +1, and the width in the Doppler domain is greater than or equal to 4(k _max +p _max )+1;

Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, d _max =max{d ₁ , d ₂ ,...d _L }, k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, p _max =max{p ₁ , p ₂ , . . . p _L }.

Optionally, in the case where the position of the first guard interval does not change with the cyclic shift, the size of the first guard interval satisfies:

The width in the delay domain is greater than or equal to 2l _max +1, or the width in the delay domain is greater than or equal to (L+1)l _max +L;

The width in the Doppler domain is greater than or equal to 4k _max +1;

Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, k _max =v _max NT, v _max is the maximum Doppler of the channel, and T is the time-frequency domain Symbol duration, T=1/Δf.

Optionally, the location of the first guard interval is set by the agreement or by the sending end;

In the case that the location of the first guard interval is set by the sending end, the sending end sends the location of the first guard interval to the receiving end through target information.

Optionally, a pilot is set in the first guard interval.

Optionally, the location of the pilot does not change with the cyclic shift, or changes with the cyclic shift.

Optionally, the manner of setting the pilot includes: at least one of an impulse pilot and a sequence pilot.

Optionally, the pilot information corresponding to the pilot is stipulated in the protocol or set by the sending end;

In the case that the pilot information corresponding to the pilot is set by the sending end, the sending end sends the pilot information corresponding to the pilot to the receiving end through the target information;

Wherein, the pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.

Optionally, the obtaining module 1001 includes:

The first acquisition unit is configured to multiply the delayed Doppler information on the L antennas with phase offsets corresponding to the antennas to acquire the first delayed Doppler information corresponding to each antenna;

The second obtaining unit is configured to perform cyclic shift on the first delayed Doppler information on the L antennas respectively, and obtain the first information corresponding to each antenna.

Optionally, the phase offset corresponding to each antenna is set by the agreement or by the sending end;

In the case that the phase offset corresponding to each antenna is set by the sending end, the sending end sends the phase offset corresponding to each antenna to the receiving end through target information.

Optionally, a second guard interval is set in the Doppler domain in the delayed Doppler information;

Wherein, the second guard interval is set in at least one of the following positions:

Preset delay domain position;

Preset Doppler domain location.

Optionally, the sending module 1002 includes:

a third obtaining unit, configured to transform the first information into the time-frequency domain to obtain the second information;

a fourth obtaining unit, configured to transform the second information into a time domain to obtain third information;

a sending unit, configured to send the third information through L antennas respectively.

Optionally, a second guard interval is set in the second information;

Wherein, the second guard interval is set in at least one of the following positions:

Preset time domain position;

Preset frequency domain location.

Optionally, the second guard interval satisfies at least one of the following:

Configured as all 0;

cyclic prefix;

Cyclic suffix.

Optionally, the location of the second guard interval is agreed by the protocol or set by the sending end;

In the case that the location of the second guard interval is set by the sending end, the sending end sends the location of the second guard interval to the receiving end through target information.

Optionally, the shift information of the cyclic shift is agreed by the protocol or set by the sending end;

In the case that the shift information is set by the sending end, the sending end sends the shift information to the receiving end through target information;

Wherein, the shift information includes: at least one of the number of shifts along the delay direction and the number of shifts along the Doppler direction.

Optionally, the target information includes at least one of the following:

RRC signaling;

Layer 1 signaling of PDCCH;

Information carried on PDSCH;

MAC CE signaling;

SIB;

Layer 1 signaling of PUCCH;

MSG 1 of PRACH;

MSG 2 of PRACH;

MSG 3 of PRACH;

MSG 4 of PRACH;

MSG A of PRACH;

MSG B of PRACH;

Information carried on PUSCH;

Xn interface signaling;

PC5 interface signaling;

Pass-through link interface signaling.

It should be noted that this device embodiment corresponds to the above-mentioned method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this device embodiment, and can achieve the same technical effect.

The information transmission device provided by the embodiment of the present application can realize each process realized by the method embodiment in FIG. 2 and achieve the same technical effect. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a sending end, including a processor and a communication interface, the processor is used to cyclically shift the delayed Doppler information on the L antennas respectively, and obtain the first information corresponding to each antenna; The communication interface is used to send the first information through L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

This embodiment of the sending end corresponds to the above embodiment of the method at the sending end, and the various implementation processes and implementation methods of the above method embodiments can be applied to this embodiment of the sending end, and can achieve the same technical effect. Specifically, FIG. 11 is a schematic diagram of a hardware structure of a sending end implementing an embodiment of the present application.

The sending end 1100 includes: an antenna 1101 , a radio frequency device 1102 , and a baseband device 1103 . The antenna 1101 is connected to the radio frequency device 1102 . In the uplink direction, the radio frequency device 1102 receives information through the antenna 1101, and sends the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be sent and sends it to the radio frequency device 1102 , and the radio frequency device 1102 processes the received information and sends it out through the antenna 1101 .

The foregoing frequency band processing device may be located in the baseband device 1103 , and the method performed by the first network side device in the above embodiments may be implemented in the baseband device 1103 , and the baseband device 1103 includes a processor 1104 and a memory 1105 .

The baseband device 1103 may include, for example, at least one baseband board, and the baseband board is provided with a plurality of chips, as shown in FIG. The information transmission method shown in the above method embodiment.

The baseband device 1103 may also include a network interface 1106 for exchanging information with the radio frequency device 1102, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the sending end of the embodiment of the present invention also includes: instructions or programs stored in the memory 1105 and operable on the processor 1104, and the processor 1104 calls the instructions or programs in the memory 1105 to execute the modules shown in FIG. method, and achieve the same technical effect, in order to avoid repetition, it is not repeated here.

Preferably, the embodiment of the present application also provides a sending end, including a processor, a memory, and a program or instruction stored in the memory and operable on the processor. When the program or instruction is executed by the processor, the application Each process of the embodiment of the information transmission method on the sending end side can achieve the same technical effect, so to avoid repetition, details are not described here.

The embodiment of the present application also provides a readable storage medium. The computer-readable storage medium stores programs or instructions. When the program or instructions are executed by the processor, each process of the embodiment of the information transmission method applied to the sending end is implemented. And can achieve the same technical effect, in order to avoid repetition, no more details here.

Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

Specifically, FIG. 12 is a schematic diagram of another hardware structure of the sending end implementing the embodiment of the present application.

The sending end 1200 includes, but is not limited to: a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210, etc. at least some of the components.

Those skilled in the art can understand that the terminal 1200 can also include a power supply (such as a battery) for supplying power to various components, and the power supply can be logically connected to the processor 1210 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 12 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in the embodiment of the present application, the input unit 1204 may include a graphics processor (Graphics Processing Unit, GPU) 12041 and a microphone 12042, and the graphics processor 12041 is used for the image capture device ( Such as the image data of the static picture or video obtained by the camera) for processing. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1207 includes a touch panel 12071 and other input devices 12072 . Touch panel 12071, also called touch screen. The touch panel 12071 may include two parts, a touch detection device and a touch controller. Other input devices 12072 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 repeated here.

In the embodiment of the present application, the radio frequency unit 1201 receives the downlink data from the network side device, and processes it to the processor 1210; in addition, sends the uplink data to the network side device. Generally, the radio frequency unit 1201 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1209 can be used to store software programs or instructions as well as various data. The memory 1209 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playback function, an image playback function, etc.) and the like. In addition, the memory 1209 may include a high-speed random access memory, and may also include a nonvolatile memory, wherein the nonvolatile memory may be a read-only memory (Read-Only Memory, ROM), a 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. For example at least one disk storage device, flash memory device, or other non-volatile solid state storage device.

The processor 1210 may include one or more processing units; optionally, the processor 1210 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, application programs or instructions, etc., Modem processors mainly handle wireless communications, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 1210 .

Wherein, the processor 1210 is used to implement:

Performing cyclic shift on the delayed Doppler information on the L antennas respectively, to obtain the first information corresponding to each antenna;

The radio frequency unit 1201 is configured to implement: sending the first information through L antennas respectively;

Wherein, L is an integer greater than or equal to 1.

Optionally, the cyclic shift includes at least one of the following:

Cyclic shift in delay direction;

Cyclic shift in Doppler direction.

Optionally, in a case where the cyclic shift includes a cyclic shift along a delay direction, the processor 1210 is configured to implement:

On the l-th antenna, place the last d _l bits of the delayed Doppler information along the delay direction on the d _l bits of the head, and the remaining Md _l bits are sequentially moved backward by d _l bits; or

On the l-th antenna, place the first d _l bits of the delayed Doppler information on the tail d _l bits along the delay direction, and move the remaining Md _l bits forward in turn by d _l bits;

Among them, d _l is the number of shifts along the delay direction on the lth antenna, d _l is greater than or equal to 1, M is the total number of indexes of the delay Doppler information in the delay direction, l=1, 2, ..., L .

Optionally, the determination method of d _l is:

Determine according to the formula: d _l = (l-1)l _max ;

Wherein, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, and Δf is the subcarrier spacing in the time-frequency domain.

Optionally, in a case where the cyclic shift includes a cyclic shift along the Doppler direction, the processor 1210 is configured to implement:

On the l-th antenna, place the last p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit of the head, and the remaining Np _l bits are sequentially moved backward by p _l bits; or

On the l-th antenna, place the _front p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit at the tail, and move the remaining Np _l bits forward in sequence;

Among them, p _l is the number of shifts along the Doppler direction on the lth antenna, p _l is greater than or equal to 1, N is the total number of indexes of the delayed Doppler information in the Doppler direction, l=1,2 ,…, L.

Optionally, the determination method of p _l is:

Determine according to the formula: p _l = (l-1)k _max ;

Where k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, and Δf is the subcarrier spacing in the time-frequency domain.

Optionally, in a case where the cyclic shift includes a cyclic shift along a delay direction and a cyclic shift along a Doppler direction, the processor 1210 is configured to implement:

On the first antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the delay direction; or

On the first antenna, the delayed Doppler information is cyclically shifted along the delay direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the Doppler direction;

Wherein, l=1, 2, . . . , L.

Optionally, the delay Doppler field in the delay Doppler information is set with a first guard interval.

Optionally, in the case where the position of the first guard interval changes with cyclic shift, the size of the first guard interval satisfies at least one of the following:

In the case of cyclic shifting along the delay direction, the width of the first guard interval in the delay domain is greater than or equal to 2(l _max +d _max )+1, and the width in the Doppler domain is greater than or equal to 4k _max + 1;

In the case of cyclic shifting along the Doppler direction, the width of the first guard interval in the delay domain is greater than or equal to 2l _max +1, and the width in the Doppler domain is greater than or equal to 4(k _max +p _max )+1;

Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, d _max =max{d ₁ , d ₂ ,...d _L }, k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, p _max =max{p ₁ , p ₂ , . . . p _L }.

Optionally, in the case where the position of the first guard interval does not change with the cyclic shift, the size of the first guard interval satisfies:

The width in the delay domain is greater than or equal to 2l _max +1; or the width in the delay domain is greater than or equal to (L+1)l _max +L;

The width in the Doppler domain is greater than or equal to 4k _max +1;

Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, k _max =v _max NT, v _max is the maximum Doppler of the channel, and T is the time-frequency domain Symbol duration, T=1/Δf.

Optionally, the location of the first guard interval is set by the agreement or by the sending end;

In the case that the location of the first guard interval is set by the sending end, the sending end sends the location of the first guard interval to the receiving end through target information.

Optionally, a pilot is set in the first guard interval.

Optionally, the location of the pilot does not change with the cyclic shift, or changes with the cyclic shift.

Optionally, the manner of setting the pilot includes: at least one of an impulse pilot and a sequence pilot.

Optionally, the pilot information corresponding to the pilot is stipulated in the protocol or set by the sending end;

In the case that the pilot information corresponding to the pilot is set by the sending end, the sending end sends the pilot information corresponding to the pilot to the receiving end through the target information;

Wherein, the pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.

Optionally, the processor 1210 is used to implement:

The transmitting end multiplies the delayed Doppler information and the phase offset corresponding to the antennas on the L antennas respectively, to obtain the first delayed Doppler information corresponding to each antenna;

The transmitting end respectively performs cyclic shift on the first delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna.

Optionally, the phase offset corresponding to each antenna is set by the agreement or by the sending end;

In the case that the phase offset corresponding to each antenna is set by the sending end, the sending end sends the phase offset corresponding to each antenna to the receiving end through target information.

Optionally, a second guard interval is set in the Doppler domain in the delayed Doppler information;

Wherein, the second guard interval is set in at least one of the following positions:

Preset delay domain position;

Preset Doppler domain location.

Optionally, the processor 1210 is used to implement:

transforming the first information into a time-frequency domain to obtain second information;

transforming the second information into a time domain to obtain third information;

The radio frequency unit 1201 is configured to implement: sending the third information through L antennas respectively.

Optionally, a second guard interval is set in the second information;

Wherein, the second guard interval is set in at least one of the following positions:

Preset time domain position;

Preset frequency domain location.

Optionally, the second guard interval satisfies at least one of the following:

Configured as all 0;

cyclic prefix;

Cyclic suffix.

Optionally, the location of the second guard interval is agreed by the protocol or set by the sending end;

In the case that the location of the second guard interval is set by the sending end, the sending end sends the location of the second guard interval to the receiving end through target information.

Optionally, the shift information of the cyclic shift is agreed by the protocol or set by the sending end;

In the case that the shift information is set by the sending end, the sending end sends the shift information to the receiving end through target information;

Wherein, the shift information includes: at least one of the number of shifts along the delay direction and the number of shifts along the Doppler direction.

Optionally, the target information includes at least one of the following:

RRC signaling;

Layer 1 signaling of PDCCH;

Information carried on PDSCH;

MAC CE signaling;

SIB;

Layer 1 signaling of PUCCH;

MSG 1 of PRACH;

MSG 2 of PRACH;

MSG 3 of PRACH;

MSG 4 of PRACH;

MSG A of PRACH;

MSG B of PRACH;

Information carried on PUSCH;

Xn interface signaling;

PC5 interface signaling;

Pass-through link interface signaling.

Optionally, as shown in FIG. 13 , this embodiment of the present application further provides a communication device 1300, including a processor 1301, a memory 1302, and programs or instructions stored in the memory 1302 and operable on the processor 1301, For example, when the communication device 1300 is the sending end, when the program or instruction is executed by the processor 1301, the various processes of the above-mentioned information transmission method embodiments can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The terminal involved in this embodiment of the present application may be a device that provides voice and/or data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called User Equipment (User Equipment, UE). The wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phone, cordless phone, Session Initiated Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant, PDA) and other devices. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), and user device (user device), which are not limited in this embodiment of the application.

The network side equipment involved in the embodiment of the present application may be a base station (Base Transceiver Station, BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), or it may be A base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or The base stations and the like in the future 5G network are not limited here.

One or more antennas can be used between the network side device and the terminal to perform multiple input multiple output (Multi Input Multi Output, MIMO) transmission, MIMO transmission can be single user MIMO (Single User MIMO, SU-MIMO) or multi user MIMO (Multiple User MIMO, MU-MIMO). According to the form and quantity of root antenna combinations, MIMO transmission can be two-dimensional MIMO (two-dimensional MIMO, 2D-MIMO), three-dimensional MIMO (three-dimensional MIMO, 3D-MIMO), full-dimensional MIMO (Full Dimension MIMO, FD- MIMO) or massive-MIMO (massive-MIMO), or diversity transmission, precoding transmission, or beamforming transmission, etc.

The 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, and the processor is used to run programs or instructions to implement the above information transmission method embodiment Each process can achieve the same technical effect, so in order to avoid repetition, it will not be repeated here.

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

The embodiment of the present application further provides a computer program/program product, the computer program/program product is stored in a non-transitory storage medium, and the program/program product is executed by at least one processor to realize the above-mentioned information transmission Each process of the method embodiment can achieve the same technical effect, and will not be repeated here to avoid repetition.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising 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, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

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

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but 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 Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims (30)

1. A method of information transmission, comprising:

   The transmitting end cyclically shifts the delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna;

   The sending end sends the first information through the L antennas respectively;

   Wherein, L is an integer greater than or equal to 1.
2. The method according to claim 1, wherein the cyclic shift comprises at least one of the following:

   Cyclic shift in delay direction;

   Cyclic shift in Doppler direction.
3. The method according to claim 2, wherein, in the case where the cyclic shift includes a cyclic shift along the delay direction, the transmitting end performs a cyclic shift on the delayed Doppler information on the L antennas respectively, include:

   On the l-th antenna, place the last d _l bits of the delayed Doppler information along the delay direction on the d _l bits of the head, and the remaining Md _l bits are sequentially moved backward by d _l bits; or

   On the l-th antenna, place the first d _{l bits of the delayed Doppler information on the tail d l bits} along the delay direction, and move the remaining Md _l bits forward in turn by d _l bits;

   Among them, d _l is the number of shifts along the delay direction on the lth antenna, d _l is greater than or equal to 1, M is the total number of indexes of the delay Doppler information in the delay direction, l=1, 2, ..., L .
4. The method according to claim 3, wherein the determination of d _l is:

   Determine according to the formula: d _l = (l-1)l _max ;

   Wherein, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, and Δf is the subcarrier spacing in the time-frequency domain.
5. The method according to claim 2, wherein, when the cyclic shift includes a cyclic shift along the Doppler direction, the transmitting end cyclically shifts the delayed Doppler information on the L antennas respectively. bits, including:

   On the l-th antenna, place the last p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit of the head, and the remaining Np _l bits are sequentially moved backward by p _l bits; or

   On the l-th antenna, place the _front p _l bit of the delayed Doppler information along the Doppler direction on the p _l bit at the tail, and move the remaining Np _l bits forward in sequence;

   Among them, p _l is the number of shifts along the Doppler direction on the lth antenna, p _l is greater than or equal to 1, N is the total number of indexes of the delayed Doppler information in the Doppler direction, l=1,2 ,…, L.
6. The method according to claim 5, wherein the determination of p ₁ is:

   Determine according to the formula: p _l = (l-1)k _max ;

   Where k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, and Δf is the subcarrier spacing in the time-frequency domain.
7. The method according to any one of claims 2-6, wherein, when the cyclic shift includes a cyclic shift along the delay direction and a cyclic shift along the Doppler direction, the transmitting end is at L The delayed Doppler information is cyclically shifted on the root antenna, including:

   On the first antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the delay direction; or

   On the first antenna, the delayed Doppler information is cyclically shifted along the delay direction, and the cyclically shifted delayed Doppler information is cyclically shifted along the Doppler direction;

   Wherein, l=1, 2, . . . , L.
8. The method according to any one of claims 2-7, wherein the delay Doppler field in the delay Doppler information is set with a first guard interval.
9. The method according to claim 8, wherein, in the case where the position of the first guard interval changes with the cyclic shift, the size of the first guard interval satisfies at least one of the following:

   In the case of cyclic shifting along the delay direction, the width of the first guard interval in the delay domain is greater than or equal to 2(l _max +d _max )+1, and the width in the Doppler domain is greater than or equal to 4k _max + 1;

   In the case of cyclic shifting along the Doppler direction, the width of the first guard interval in the delay domain is greater than or equal to 2l _max +1, and the width in the Doppler domain is greater than or equal to 4(k _max +p _max )+1;

   Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, d _max =max{d ₁ , d ₂ ,...d _L }, k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T=1/Δf, p _max =max{p ₁ , p ₂ , . . . p _L }.
10. The method according to claim 8, wherein, in the case where the position of the first guard interval does not change with the cyclic shift, the size of the first guard interval satisfies:

    The width in the delay domain is greater than or equal to 2l _max +1, or the width in the delay domain is greater than or equal to (L+1)l _max +L;

    The width in the Doppler domain is greater than or equal to 4k _max +1;

    Among them, l _max =τ _max MΔf, τ _max is the maximum delay of the channel, Δf is the subcarrier spacing in the time-frequency domain, k _max =v _max NT, v _max is the maximum Doppler of the channel, T is the time-frequency domain Symbol duration, T=1/Δf.
11. The method according to claim 8, wherein the location of the first guard interval is set by the agreement or by the sending end;

    In the case that the location of the first guard interval is set by the sending end, the sending end sends the location of the first guard interval to the receiving end through target information.
12. The method according to claim 8, wherein a pilot frequency is set in the first guard interval.
13. The method according to claim 12, wherein the location of the pilot does not change with the cyclic shift, or changes with the cyclic shift.
14. The method according to claim 12, wherein the setting manner of the pilot comprises: at least one of an impulse pilot and a sequence pilot.
15. The method according to any one of claims 12-14, wherein the pilot information corresponding to the pilot is set by the agreement or by the sending end;

    In the case that the pilot information corresponding to the pilot is set by the sending end, the sending end sends the pilot information corresponding to the pilot to the receiving end through the target information;

    Wherein, the pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.
16. The method according to claim 1, wherein the transmitting end performs cyclic shift on the L antennas respectively to the delayed Doppler information, and obtains the first information corresponding to each antenna, including:

    The transmitting end multiplies the delayed Doppler information and the phase offset corresponding to the antennas on the L antennas respectively, to obtain the first delayed Doppler information corresponding to each antenna;

    The transmitting end respectively performs cyclic shift on the first delayed Doppler information on the L antennas to obtain the first information corresponding to each antenna.
17. The method according to claim 16, wherein the phase offset corresponding to each antenna is set by the agreement or by the sending end;

    In the case that the phase offset corresponding to each antenna is set by the sending end, the sending end sends the phase offset corresponding to each antenna to the receiving end through target information.
18. The method according to claim 1, wherein a second guard interval is set in the Doppler domain in the delayed Doppler information;

    Wherein, the second guard interval is set in at least one of the following positions:

    Preset delay domain position;

    Preset Doppler domain location.
19. The method according to claim 1, wherein the transmitting end transmits the first information through the L antennas respectively, comprising:

    The sending end transforms the first information into the time-frequency domain to obtain the second information;

    The sending end transforms the second information into a time domain to obtain third information;

    The sending end sends the third information through the L antennas respectively.
20. The method according to claim 19, wherein a second guard interval is set in the second information;

    Wherein, the second guard interval is set in at least one of the following positions:

    preset time domain positions;

    Preset frequency domain location.
21. The method according to claim 18 or 20, wherein the second guard interval satisfies at least one of the following:

    The configuration is all 0;

    cyclic prefix;

    Cyclic suffix.
22. The method according to claim 18 or 20, wherein the location of the second guard interval is set by the agreement or by the sender;

    In the case that the location of the second guard interval is set by the sending end, the sending end sends the location of the second guard interval to the receiving end through target information.
23. The method according to claim 1, wherein the shift information of the cyclic shift is set by the agreement or by the sending end;

    In the case that the shift information is set by the sending end, the sending end sends the shift information to the receiving end through target information;

    Wherein, the shift information includes: at least one of the number of shifts along the delay direction and the number of shifts along the Doppler direction.
24. The method of claim 11, 15, 17, 22 or 23, wherein the target information includes at least one of the following:

    radio resource control RRC signaling;

    Layer 1 signaling of the physical downlink control channel PDCCH;

    Information carried on the physical downlink shared channel PDSCH;

    Signaling of the media access control layer control unit MAC CE;

    system information block SIB;

    Layer 1 signaling of the physical uplink control channel PUCCH;

    Message one MSG 1 of the physical random access channel PRACH;

    PRACH message 2 MSG 2;

    PRACH message three MSG 3;

    PRACH message four MSG 4;

    PRACH's message A MSG A;

    PRACH message B MSG B;

    Information carried on the physical uplink shared channel PUSCH;

    Xn interface signaling;

    PC5 interface signaling;

    Pass-through link interface signaling.
25. An information transmission device, applied to a sending end, comprising:

    An acquisition module, configured to cyclically shift the delayed Doppler information on the L antennas to acquire the first information corresponding to each antenna;

    a sending module, configured to send the first information through L antennas respectively;

    Wherein, L is an integer greater than or equal to 1.
26. A sending end, comprising a processor, a memory, and a program or instruction stored on the memory and operable on the processor, wherein, when the program or instruction is executed by the processor, claim 1 is realized Steps in the information transmission method described in any one of 24 to 24.
27. A readable storage medium storing programs or instructions on the readable storage medium, wherein the steps of the information transmission method according to any one of claims 1 to 24 are implemented when the programs or instructions are executed by a processor.
28. A chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the information transmission method according to any one of claims 1 to 24 A step of.
29. A computer program product, the program product is executed by at least one processor to implement the steps of the information transmission method according to any one of claims 1 to 24.
30. A communication device, configured to execute the information transmission method according to any one of claims 1 to 24.

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