CN115987344A

CN115987344A - Information transmission method, device and sending end

Info

Publication number: CN115987344A
Application number: CN202111210746.1A
Authority: CN
Inventors: 王方刚; 王东; 孙布勒; 刘昊; 李淅然; 单雅茹; 郝亚星
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-18
Publication date: 2023-04-18
Also published as: WO2023061491A1

Abstract

The application discloses an information transmission method, an information transmission device and a sending end, which are applied to the technical field of communication. The method comprises the following steps: the method comprises the steps that a sending end carries out cyclic shift on delay Doppler information on L antennas respectively to obtain first information corresponding to each antenna; the sending end sends the first information through L antennas respectively; wherein L is an integer greater than or equal to 1.

Description

Information transmission method, device and sending end

Technical Field

The present application relates to the field of communications, and in particular, to an information transmission method and apparatus, and a sending end.

Background

At present, the multi-antenna technology in the delay-doppler domain has no mature scheme. Due to the two-dimensional convolution relationship between the delay-doppler domain information and the channel, the multi-antenna scheme in the conventional Orthogonal Frequency Division Multiplexing (OFDM) system cannot be directly applied in the delay-doppler domain. In addition, the multi-antenna transmission scheme in the existing delay-doppler domain also has the problems of high precoding complexity, large channel information feedback quantity and the like.

Disclosure of Invention

The embodiment of the application provides an information transmission method, an information transmission device and a sending end, and can solve the problems of high precoding complexity and large channel information feedback quantity of a multi-antenna transmission scheme in the existing delay Doppler domain.

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

the method comprises the steps that a sending end carries out cyclic shift on delay Doppler information on L antennas respectively to obtain first information corresponding to each antenna;

the transmitting end transmits 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 apparatus is provided, including:

the acquisition module is used for respectively carrying out cyclic shift on the delay Doppler information on the L antennas and acquiring 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 a third aspect, a transmitting end is provided, which includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, and when executed by the processor, the program or the instruction implements the steps of the method according to the first aspect.

In a fourth aspect, a sending end is provided, which includes a processor and a communication interface, where the processor is configured to perform cyclic shift on delay doppler information on L antennas respectively, and obtain first information corresponding to each antenna; the communication interface is used for sending the first information through the L antennas respectively;

wherein L is an integer greater than or equal to 1.

In a fifth aspect, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, carries out the steps of the method according to the first aspect.

In a sixth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the steps of the method according to the first aspect.

In a seventh aspect, a computer program/program product stored on a non-transitory storage medium is provided, the program/program product being executable by at least one processor to implement the steps of the method according to the first aspect.

In the embodiment of the application, the delay doppler information is respectively subjected to cyclic shift on the L antennas to obtain first information corresponding to each antenna, and the first information is respectively sent through the L antennas, so that the precoding complexity can be reduced, the channel information feedback amount can be reduced, and the diversity gain in the delay doppler domain can be obtained.

Drawings

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

fig. 2 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

FIG. 3 is a schematic illustration of cyclic shift in the delay direction;

FIG. 4 is a schematic illustration of cyclic shift along the Doppler direction;

FIG. 5 is a diagram of fixed pilot and first guard interval positions when cyclically shifted in the delay direction;

FIG. 6 is a diagram of the position of the pilot and first guard interval varying with cyclic shift when cyclically shifted in the delay direction;

FIG. 7 is a diagram of the fixed pilot and first guard interval location as cyclically shifted along the Doppler direction;

FIG. 8 is a diagram illustrating the location of the pilot and first guard interval as a function of cyclic shift when cyclically shifted in the Doppler direction;

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

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

fig. 11 is a block diagram of a transmitting end according to an embodiment of the present application;

fig. 12 is a second block diagram of the structure of the transmitting end according to the embodiment of the present application;

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

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. 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 other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-a) systems, but may also be used in other wireless communication systems, such as 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 the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as 6th generation,6g communication systems.

Fig. 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. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. 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 the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and 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 a specific type of the Base Station is not limited.

The related art to which the present application relates is described below:

background of the multi-antenna technique in Orthogonal Time Frequency Space (OTFS):

at present, the delay-doppler domain multi-antenna transmission scheme is still under research, and mainly includes two aspects of an open-loop scheme and a closed-loop scheme. The open-loop scheme refers to a scheme with channel information feedback, and the transmitting end can perform operations such as precoding according to the fed-back channel information. The closed-loop scheme is a scheme without channel information feedback, and a transmitting end directly operates symbols. Wherein with respect to closed loop transmission schemes:

(1) Scheme based on analog beamforming:

different users are distinguished in the angular domain by analog beamforming. Only single stream transmission per user can be achieved because the resolution of the angle domain can only be used to distinguish users, while multiple streams also need to be distinguished with digital precoding.

(2) Spatial multiplexing scheme (digital precoding)

Firstly, based on the vectorization representation form of the delay-Doppler domain, the channels of a plurality of transmit-receive terminal antenna pairs are spliced into a high-dimensional equivalent channel matrix. And then, carrying out digital precoding based on the high-dimensional equivalent channel matrix to distinguish data of multiple streams or multiple users. However, the disadvantage of this scheme is that the dimension of an equivalent Multiple Input Multiple Output (MIMO) matrix is very large, and the complexity of precoding is very high.

(3) Thp scheme

The originating terminal is assumed to obtain the channel state information through feedback, and decompose the equivalent channel matrix of the delay-doppler domain, thereby eliminating the interference between all the single symbols on different layers. However, this scheme requires serial operations on each transmitted symbol and is computationally complex.

For a fast time-varying system, the feedback of channel information can increase the delay of a sending end, so that the difference between the current channel state and the feedback information is large, the sending end transmission scheme is not matched with the current channel state, and the significance of channel feedback is lost. There are several current OTFS multi-antenna schemes for open loop:

(1) Transmit diversity scheme

And performing space-time coding by taking a plurality of continuous delay Doppler frames as granularity to obtain diversity gain. The premise of this scheme is that the channel is assumed to be the same for consecutive delay-doppler frames. However, due to the variation characteristic of the channel and the large granularity of the delay doppler frame, the channels of consecutive delay doppler frames are actually different, and thus are not suitable for direct space-time coding.

(2) Uplink assisted transmission scheme

And estimating the angle, delay and Doppler information of each user through the uplink pilot frequency by utilizing the angle, delay and Doppler reciprocity of the uplink and the downlink, and detecting signals of different users at different angles. And finally, forming respective beamforming vectors based on the estimated angle direction of each user, so as to avoid the interference among multiple users. However, this scheme requires the reciprocity of uplink and downlink channels and cannot realize multi-stream transmission of a single user.

Currently, there is no multi-antenna transmission scheme for the delay-doppler domain that can be achieved by engineering. The application provides a transmission mode of multi-delay Doppler domain information cyclic shift, which is an open-loop multi-antenna transmission scheme under single-layer data.

The information transmission method, apparatus, and transmitting end provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 2, an embodiment of the present application provides an information transmission method, including:

step 201, a transmitting end performs cyclic shift on the delay doppler information on L antennas respectively to obtain first information corresponding to each antenna;

l is an integer of 1 or more.

It should be noted that, the present application mainly aims at how to transmit information when a transmitting end is a transmitting end and has multiple antennas, that is, in a specific application, the number of antennas of the transmitting 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 this embodiment of the present application, a sending end modulates information (symbol) to be sent and then carries the information in a delay doppler domain, and obtains delay doppler information, because there are L antennas to send information, the delay doppler information is cyclically shifted corresponding to each antenna, so as to obtain first information corresponding to each antenna, and then each antenna is used to send first information corresponding to each antenna (it should be noted that, although the first information is called, for each antenna, the first information corresponding to different antennas is different), to a receiving end, for example, the sending end sends information by using two antennas, and then, for antenna 1, the delay doppler information is cyclically shifted to obtain information one, and for antenna 2, the delay doppler information is cyclically shifted to obtain information two, and then, the information one is sent by using antenna 1, and the information two is sent by using antenna 2; by circularly shifting the delay Doppler frame in the delay domain or the Doppler domain on different antennas, the diversity gain in the delay Doppler domain is obtained, the precoding complexity is reduced, and the channel information feedback quantity is reduced.

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

cyclic shift in the delay direction;

cyclic shift in the doppler direction.

The following describes different cyclic shift schemes in detail.

Case one, the cyclic shift includes a cyclic shift in a delay direction

In particular, in this case, a specific implementation manner of the step 201 includes one of the following:

a11, on the l antenna, the last d of the delay Doppler information along the delay direction _l Position on head d _l Bit, remaining M-d _l Bit is moved backward in sequence by d _l A bit;

a12, on the first antenna, the front d of the delay Doppler information along the delay direction _l Bit at tail d _l Bit, remaining M-d _l Bit is sequentially moved forward by d _l A bit;

in addition, d is _l The number of shifts in the delay direction on the l-th antenna, d _l 1,M is the total number of indices of the delay doppler information in the delay direction, i.e., the number of subcarriers in the frequency domain, and may also be regarded as the total number of grids of the delay doppler information in the delay direction, i =1,2, …, L.

Here, it is to be noted that d _l The determination method comprises the following steps:

according to the formula: d is a radical of _l ＝(l-1)l _max Determining;

wherein l _max ＝τ _max MΔf，τ _max Δ f is the subcarrier spacing in the time-frequency domain for the maximum delay of the channel.

That is, the number of shifts in the delay direction on each antenna is determined, and then cyclic shift is performed according to the number of shifts, for example, the number of shifts in the delay direction finally determined on the antenna 1 is 1 bit, and the number of shifts in the delay direction finally determined on the antenna 2 is 2 bits, so that the last 1 bit of the delay doppler information in the delay direction can be placed on one bit of the head on the antenna 1, the remaining M-1 bits are sequentially moved backward by 1 bit, the last 2 bits of the delay doppler information in the delay direction are placed on two bits of the head on the antenna 2, and the remaining M-2 bits are sequentially moved backward by 2 bits; or the first 1 bit of the delay Doppler information along the delay direction is placed on one bit of the tail part on the antenna 1, the rest M-1 bits move backwards and forwards sequentially by 1 bit, the head 2 bit of the delay Doppler information along the delay direction is placed on two bits of the tail part on the antenna 2, and the rest M-2 bits move forwards sequentially by 2 bits; or the last 1 bit of the delay Doppler information along the delay direction is placed on one bit of the head on the antenna 1, the rest M-1 bits are sequentially moved backwards by 1 bit, the head 2 bit of the delay Doppler information along the delay direction is placed on two bits of the tail on the antenna 2, and the rest M-2 bits are sequentially moved forwards by 2 bits; it is also possible to place the first 1 bit of the delay doppler information along the delay direction on the antenna 1 on one bit of the tail, move the remaining M-1 bits forward in sequence by 1 bit, place the last 2 bits of the delay doppler information along the delay direction on two bits of the head on the antenna 2, and move the remaining M-2 bits backward in sequence by 2 bits.

For example, the transmit end 3 antenna is taken as an example to give a result of cyclic shift along the delay direction, and delay doppler information after cyclic shift of each antenna is shown in fig. 3.

Case two, the cyclic shift comprises a cyclic shift in the doppler direction

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

b11, delaying the last p of the Doppler information along the Doppler direction on the ith antenna _l Bit placed at the head p _l In bits, the remaining N-p _l The bits are sequentially shifted backwards by p _l A bit;

b12, on the first antenna, the front p of the delay Doppler information along the Doppler direction _l Bit placed at tail p _l In bits, the remaining N-p _l Bit is sequentially shifted forward by p _l A bit;

to say thatIt is clear that _l Is the number of shifts in the Doppler direction, p, on the ith antenna _l The index number of the delay doppler information in the doppler direction, i.e., the number of symbols in the time domain, is 1,N or more, and may also be regarded as the total number of grids of the delay doppler information in the doppler direction, i =1,2, …, L.

Here, it is to be noted that p _l The determination method comprises the following steps:

according to the formula: p is a radical of _l ＝(l-1)k _max Determining;

wherein k is _max ＝v _max NT，v _max For maximum doppler of the channel, T is the symbol duration in the time-frequency domain, T =1/Δ f, Δ f is the subcarrier spacing in the time-frequency domain.

That is, the number of shifts in the doppler direction on each antenna is determined, and then cyclic shift is performed according to the number of shifts, for example, the number of shifts in the doppler direction finally determined on the antenna 1 is 1 bit, and the number of shifts in the doppler direction finally determined on the antenna 2 is 2 bits, so that the last 1 bit of the delayed doppler information in the doppler direction can be placed on one bit of the head on the antenna 1, the remaining N-1 bits are sequentially moved backward by 1 bit, the last 2 bits of the delayed doppler information in the doppler direction are placed on two bits of the head on the antenna 2, and the remaining N-2 bits are sequentially moved backward by 2 bits; or the front 1 bit of the delay Doppler information along the Doppler direction is placed on one bit of the tail part on the antenna 1, the rest N-1 bits move forward 1 bit in sequence, the head 2 bit of the delay Doppler information along the Doppler direction is placed on two bits of the tail part on the antenna 2, and the rest N-2 bits move forward 2 bit in sequence; or the last 1 bit of the delay Doppler information along the Doppler direction is placed on one bit of the head on the antenna 1, the rest N-1 bits move backwards in sequence by 1 bit, the head 2 bit of the delay Doppler information along the Doppler direction is placed on two bits of the tail on the antenna 2, and the rest N-2 bits move forwards in sequence by 2 bits; the front 1 bit of the delay Doppler information along the Doppler direction can be placed on one bit of the tail part on the antenna 1, the rest N-1 bits move forward 1 bit in sequence, the last 2 bits of the delay Doppler information along the Doppler direction are placed on two bits of the head part on the antenna 2, and the rest N-2 bits move backward 2 bit in sequence.

For example, the transmit end 3 antenna is taken as an example to give a result of cyclic shift along the doppler direction, and delay doppler information after cyclic shift of each antenna is shown in fig. 4.

Case three, the cyclic shift includes a cyclic shift in the delay direction and a cyclic shift in the doppler direction

c11, performing cyclic shift on the delay Doppler information along the Doppler direction on the l antenna, and performing cyclic shift on the delay Doppler information after cyclic shift along the delay direction;

c12, performing cyclic shift on the delay Doppler information along the delay direction on the l antenna, and performing cyclic shift on the delay Doppler information after cyclic shift along the Doppler direction;

when cyclic shift in the delay direction and the doppler direction is required for each antenna, the cyclic shift in the delay direction may be performed first, and then the cyclic shift in the doppler direction may be performed, or the cyclic shift in the doppler direction may be performed first, and then the cyclic shift in the delay direction may be performed; specifically, the manner of performing the cyclic shift in the delay direction and the cyclic shift in the doppler direction may refer to the implementation manners in the first case and the second case, which are not described herein again.

It should be further noted that the delay doppler domain in the delay doppler information is provided with a first guard interval, and the first guard interval is provided with a pilot, that is, the first guard interval is set to prevent the problem that mutual interference occurs between the pilot and data, which results in inaccurate channel estimation.

Specifically, the position of the first guard interval may or may not change with the cyclic shift, and the following describes the size setting of the first guard interval in different cases, respectively.

Situation one, the position of the first guard interval changes with 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 shift 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, a width in the Doppler domain greater than or equal to 4k _max +1；

In addition, d is _max ＝max{d ₁ ，d ₂ ，…d _L }

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

In addition, p is _max ＝max{p ₁ ，p ₂ ，…p _L }。

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

E12, width in Doppler domain greater than or equal to 4k _max +1。

It should be further noted that the location of the first guard interval may be agreed by a protocol, or may be set by the sending end.

Optionally, when the location of the first protection interval is set by a sending end, the sending end sends the location of the first protection interval to a receiving end through target information.

Optionally, the target information comprises at least one of:

f101, radio Resource Control (RRC) signaling;

f102, layer one signaling of a Physical Downlink Control Channel (PDCCH);

f103, information carried on a Physical Downlink Shared Channel (PDSCH);

f104, signaling of a medium access control layer control element (MAC CE);

f105, system Information Block (SIB);

f106, layer one signaling of a Physical Uplink Control Channel (PUCCH);

f107, message one (MSG 1) of a Physical Random Access Channel (PRACH);

f108, message two (MSG 2) of PRACH;

f109, message three (MSG 3) of PRACH;

f110, message four (MSG 4) of PRACH;

f111, message A of PRACH (MSG A);

f112, message B of PRACH (MSG B);

f113, information carried on a Physical Uplink Shared Channel (PUSCH);

f114, xn interface signaling;

f115, PC5 interface signaling;

f116, direct link interface signaling (sidelink interface signaling).

It should be further noted that the position of the pilot may not change with the cyclic shift, and may also change with the cyclic shift.

Further, the setting mode of the pilot frequency includes: at least one of a burst pilot and a sequence pilot.

Optionally, the pilot information corresponding to the pilot may be agreed by a protocol, or may be set by the sending end, and specifically, the pilot information corresponding to the pilot includes at least one of the following: location, setting mode and pilot frequency value.

Optionally, in a case that the pilot information corresponding to the pilot is set by the transmitting end, the transmitting end transmits the pilot information corresponding to the pilot to the receiving end through the target information.

For example, two schemes of placing the pilot and the first guard interval are given by taking a cyclic shift in the delay direction as an example.

In the first scheme, taking the antenna of the transmitting end 3 as an example, if the positions of the pilot and the first guard interval do not change with the cyclic shift, the delay doppler information of each antenna is as shown in fig. 5.

In order to prevent interference of data to pilot frequency and pilot frequency between different antennas, first guard intervals are set at 2k on both sides of the pilot frequency along Doppler direction _max L on either side of the pilot in the delay direction _max Within a grid point, the delay positions of the pilots between different antennas differ by l _max 。

In the second scheme, taking the antenna of the transmitting end 3 as an example, if the positions of the pilots and the first guard interval change with the cyclic shift, the delay doppler information of each antenna is as shown in fig. 6, and it should be noted that in this case, the pilots corresponding to different antennas in the delay doppler domain of the delay doppler information may be the same or different, and fig. 6 shows that the pilots on each antenna are different.

In order to prevent interference of data to pilot and pilot between different antennas, first guard intervals are set at l on both sides of pilot in delay direction _max +d _max And 2k on both sides of the pilot in the Doppler direction _max Within the grid points. Wherein d is _max ＝max{d ₁ ,d ₂ ,…,d _L H in this example, d _max ＝d ₃ 。

Two schemes for placing the pilot and the first guard interval are given by taking a cyclic shift in the doppler direction as an example.

In the first scheme, taking the antenna of the transmitting end 3 as an example, if the positions of the pilot and the first guard interval do not change with the cyclic shift, the delay doppler information of each antenna is as shown in fig. 7 as follows:

in order to prevent interference of data to pilot frequency and pilot frequency between different antennas, first guard intervals are set at 2k on both sides of the pilot frequency along Doppler direction _max L on either side of the pilot in the delay direction _max Within a grid point, the delay positions of the pilot frequencies between different antennas are different by l _max 。

In the second scheme, taking the transmitting end 2 antenna as an example, if the positions of the pilots and the first guard interval change with the cyclic shift, the delay doppler information of each antenna is as shown in fig. 8 below, and in this case, the pilots corresponding to different antennas in the delay doppler domain of the delay doppler information may be the same or different, and fig. 8 shows that the pilots on each antenna are different.

In order to prevent interference of data to pilot and pilot between different antennas, first guard intervals are set at l on both sides of the pilot in the delay direction _max And 2 (k) on either side of the pilot in the Doppler direction _max +p _max ) Within the grid points. Wherein p is _max ＝max{p ₁ ,p ₂ ,…,p _L In this example, p _max ＝p ₂ 。

It should be further noted that, an optional implementation manner of step 201 is:

the method comprises the steps that a sending end multiplies delay Doppler information and phase deviation corresponding to antennas on L antennas respectively to obtain first delay Doppler information corresponding to each antenna;

and the transmitting end respectively carries out cyclic shift on the first delay Doppler information on the L antennas to acquire first information corresponding to each antenna.

It should be noted that, when setting a phase offset for an antenna, before performing cyclic shift processing on delay doppler information, it is necessary to multiply the delay doppler information by the phase offset corresponding to the antenna, and then perform cyclic shift, where a plurality of antennas are present at a transmitting end, a part of antennas among the plurality of antennas may have a phase offset, and another part of antennas may not have a phase offset; and the phase offsets of different antennas may be the same or different.

Optionally, the phase offset corresponding to each antenna may be agreed by a protocol, or may be set by the transmitting end.

Optionally, when the phase offset corresponding to each antenna is set by a transmitting end, the transmitting end transmits the phase offset corresponding to each antenna to a receiving end through target information.

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

wherein the second guard interval is set at least one of:

h11, a preset delay domain position;

h12, preset doppler domain position.

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

h21, all the configuration is 0;

h22, cyclic prefix;

h23, cyclic suffix.

Optionally, the position of the second guard interval may be agreed by a protocol, or may be set by the sending end; and under the condition that the position of the second guard interval is set by the sending end, the sending end sends the position of the second guard interval to the receiving end through target information.

It should be further noted that, because the time domain signal is finally transmitted by the antenna, when the transmitting end performs the first information transmission, the delay doppler information needs to be first converted into the time domain signal, and then the time domain signal is transmitted, specifically, the step 202 in the embodiment of the present application is implemented as follows:

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

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

and the transmitting end transmits 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 at least one of:

h21, a preset time domain position;

h22, preset frequency domain position.

The second guard interval may be set in the doppler domain of the delay-doppler information or in the second information, and in general, the second guard interval may be added to one of the doppler domain and the second information.

It should be further noted that, in a general case, the shift information of the cyclic shift also needs to be known by both the transmitting end and the receiving end, specifically, the shift information of the cyclic shift may be agreed by a protocol, or may be set by the transmitting end, and specifically, the shift information includes: at least one of the number of shifts in the delay direction and the number of shifts in the Doppler direction.

Optionally, in a case that the shift information is set by a transmitting end, the transmitting end transmits the shift information to a receiving end through target information.

It should be further noted that, if at least two of 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 are notified by the sending end, the sending end may 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 an SIB; alternatively, the transmitting 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 MSG 4.

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

A communication flow corresponding to the embodiment of the present application is shown in fig. 9, where delay doppler information X is cyclically shifted for each antenna to obtain first information (X) corresponding to each antenna _l ) Then, adding pilot frequency and first protection interval in the delay Doppler domain of the first information, then carrying out OTFS modulation on the first information, adding second protection interval in the time domain, and finally sending the converted delay Doppler information to a receiver through an antennaAnd (4) end.

It should also be noted that the present application can also be extended to other transform domains other than OTFS (e.g., walsh Hadamard (WHT) transform based, discrete cosine (transform) DCT based) transmission techniques. The cyclic shift operation of the delay-doppler domain according to the present application is the same cyclic shift operation in the other transform domains; the cyclic shift operation described herein may also be performed in the delay time domain; the embodiment of the application can equivalently realize the effect of cyclic shift by adding the cyclic prefix or cyclic suffix in the delayed Doppler domain.

It should be noted that, the embodiment of the present application proposes a transmission scheme that cyclically shifts a delay-doppler domain, and performs a cyclic shift operation in the delay domain or the doppler domain, where the cyclic shift in the delay domain is a maximum delay spread, the cyclic shift in the doppler domain is a maximum doppler spread, and the transmission scheme after the shift realizes delay diversity or doppler diversity; compared with the existing delay Doppler domain transmission scheme, the delay Doppler domain cyclic shift transmission scheme provided by the embodiment of the application has the advantages that additional overhead is not required to be added, the operation is simple, only cyclic shift operation needs to be carried out on delay Doppler frames, and the implementation is more engineering in practice.

It should be noted that, in the information transmission method provided in the embodiment of the present application, the execution main body may be an information transmission apparatus, or a control module used for executing the information transmission method in the information transmission apparatus. In the embodiment of the present application, an information transmission method executed by an information transmission apparatus is taken as an example, and the information transmission apparatus provided in the embodiment of the present application is described.

As shown in fig. 10, an information transmission apparatus 1000 provided in this embodiment is applied to a sending end, and includes:

an obtaining module 1001, configured to perform cyclic shift on the delay doppler information on L antennas respectively, and obtain 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 comprises at least one of:

cyclic shift in the delay direction;

cyclic shift in the doppler direction.

Optionally, in a case that the cyclic shift includes a cyclic shift in a delay direction, the obtaining module 1001 is configured to:

at the l antenna, delay Doppler information is delayed along the last d of the delay direction _l Position on head d _l Bit, remaining M-d _l Bit is moved backward in sequence by d _l A bit; or

On the first antenna, delay Doppler information is arranged along the front d of the delay direction _l Position placed at tail d _l Bit, remaining M-d _l Bit is moved forward in sequence by d _l A bit;

wherein d is _l For the number of shifts in the delay direction on the l-th antenna, d _l 1,M is the total number of indices of the delay doppler information in the delay direction, L =1,2, …, L.

Alternatively, d _l The determination method comprises the following steps:

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

Optionally, in a case that the cyclic shift includes a cyclic shift along a doppler direction, the obtaining module 1001 is configured to:

at the l antenna, delay the last p of Doppler information along the Doppler direction _l Bit placed at the head p _l In bits, the remaining N-p _l Bit is sequentially shifted backward by p _l A bit; or alternatively

On the l antenna, the front p of the delay Doppler information along the Doppler direction _l Bit placed at tail p _l In bits, the remaining N-p _l Bit is sequentially shifted forward by p _l A bit;

wherein p is _l Is the number of shifts in the Doppler direction on the l antenna, p _l Greater than or equal to 1,N is the total number of indices of the delayed doppler information in the doppler direction, L =1,2, …, L.

Alternatively, p _l The determination method comprises the following steps:

according to the formula: p is a radical of formula _l ＝(l-1)k _max Determining;

Optionally, in a case that the cyclic shift includes a cyclic shift in a delay direction and a cyclic shift in a doppler direction, the obtaining module 1001 is configured to:

performing cyclic shift on the delay Doppler information along the Doppler direction on the l antenna, and performing cyclic shift on the delay Doppler information after cyclic shift along the delay direction; or

Performing cyclic shift on the delay Doppler information along the delay direction on the l antenna, and performing cyclic shift on the delay Doppler information after cyclic shift along the Doppler direction;

where L =1,2, …, L.

Optionally, a delay doppler domain in the delay doppler information is provided with a first guard interval.

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

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

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

Wherein l _max ＝τ _max MΔf，τ _max Δ f is the subcarrier spacing in the time-frequency domain, d, for the maximum delay of the channel _max ＝max{d ₁ ，d ₂ ，…d _L }，k _max ＝v _max NT，v _max For maximum doppler of the channel, T is the symbol duration in the time-frequency domain, T =1/Δ f, p _max ＝max{p ₁ ，p ₂ ，…p _L }。

Optionally, in a case that a position of the first guard interval is not changed with the cyclic shift, a size of the first guard interval satisfies:

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

Width in Doppler domain greater than or equal to 4k _max +1；

Wherein l _max ＝τ _max MΔf，τ _max Δ f is the subcarrier spacing in the time-frequency domain, k, for the maximum delay of the channel _max ＝v _max NT，v _max For maximum doppler of the channel, T is the symbol duration in the time-frequency domain, T =1/Δ f.

Optionally, the position of the first protection interval is set by a protocol agreement or a sending end;

and under the condition that the position of the first protection interval is set by the sending end, the sending end sends the position of the first protection interval to the receiving end through target information.

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

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

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

Optionally, the pilot information corresponding to the pilot is set by a protocol convention or a sending end;

under the condition that the pilot frequency information corresponding to the pilot frequency is set by a sending end, the sending end sends the pilot frequency information corresponding to the pilot frequency to a receiving end through target information;

wherein the pilot information corresponding to the pilot comprises at least one of the following: location, setting mode and pilot frequency value.

Optionally, the obtaining module 1001 includes:

a first obtaining unit, configured to multiply delay doppler information by phase offsets corresponding to antennas on L antennas, respectively, to obtain first delay doppler information corresponding to each antenna;

and the second acquisition unit is used for respectively carrying out cyclic shift on the first delay Doppler information on the L antennas and acquiring first information corresponding to each antenna.

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

and under the condition that the phase offset corresponding to each antenna is set by a sending end, the sending end sends the phase offset corresponding to each antenna to a receiving end through target information.

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

wherein the second guard interval is set to at least one of:

a preset delay domain position;

a preset doppler domain position.

Optionally, the sending module 1002 includes:

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

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

and 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 at least one of:

a preset time domain position;

a predetermined frequency domain position.

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

all 0's are configured;

a cyclic prefix;

a cyclic suffix.

Optionally, the position of the second guard interval is set by a protocol convention or a sending end;

and under the condition that the position of the second guard interval is set by the sending end, the sending end sends the position of the second guard interval to the receiving end through target information.

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

under the condition that the shifting information is set by a sending end, the sending end sends the shifting information to a receiving end through target information;

wherein the shift information includes: at least one of the number of shifts in the delay direction and the number of shifts in the Doppler direction.

Optionally, the target information comprises at least one of:

radio resource control, RRC, signaling;

layer one signaling of a Physical Downlink Control Channel (PDCCH);

information carried on a Physical Downlink Shared Channel (PDSCH);

the signaling of a Media Access Control (MAC) CE unit;

a system information block SIB;

layer one signaling of a Physical Uplink Control Channel (PUCCH);

message one MSG 1 of physical random access channel PRACH;

message two MSG2 of PRACH;

message three MSG 3 of PRACH;

message four MSG 4 of PRACH;

message a MSG a of PRACH;

message B MSG B of PRACH;

information carried on a Physical Uplink Shared Channel (PUSCH);

xn interface signaling;

PC5 interface signaling;

direct link interface signaling.

It should be noted that the embodiment of the apparatus corresponds to the embodiment of the method, and various implementation processes and implementations of the embodiment of the method can be applied to the embodiment of the apparatus, and the same technical effects can be achieved.

The information transmission apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 2, and achieve the same technical effect, and is not described here again to avoid repetition.

The embodiment of the present application further provides a sending end, which includes a processor and a communication interface, where the processor is configured to perform cyclic shift on the L antennas respectively to obtain first information corresponding to each antenna; the communication interface is used for respectively sending the first information through L antennas;

wherein L is an integer greater than or equal to 1.

The sending end side method embodiment corresponds to the sending end side method embodiment, and all implementation processes and implementation modes of the method embodiment can be applied to the sending end embodiment and can achieve the same technical effect. Specifically, fig. 11 is a schematic diagram of a hardware structure of a transmitting end implementing the embodiment of the present application.

The transmitting end 1100 includes: antenna 1101, radio frequency device 1102, baseband device 1103. An antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the rf 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 information to be transmitted and transmits the processed information to the rf device 1102, and the rf device 1102 processes the received information and transmits the processed information through the antenna 1101.

The above-mentioned band processing apparatus may be located in the baseband apparatus 1103, and the method performed by the first network side device in the above embodiment may be implemented in the baseband apparatus 1103, where the baseband apparatus 1103 includes a processor 1104 and a memory 1105.

The baseband device 1103 may include at least one baseband board, for example, and a plurality of chips are disposed on the baseband board, as shown in fig. 11, where one chip, for example, the processor 1104, is connected to the memory 1105 and calls the program in the memory 1105 to execute the information transmission method shown in the above method embodiment.

The baseband apparatus 1103 may further include a network interface 1106, such as a Common Public Radio Interface (CPRI), for exchanging information with the rf apparatus 1102.

Specifically, the sending end of the embodiment of the present invention further includes: the instructions or programs stored in the memory 1105 and capable of being executed on the processor 1104, and the processor 1104 invokes the instructions or programs in the memory 1105 to execute the methods executed by the modules shown in fig. 10, so as to achieve the same technical effects, and are not described herein in detail in order to avoid repetition.

Preferably, an embodiment of the present application further provides a sending end, which includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where the program or the instruction is executed by the processor to implement each process of the information transmission method embodiment applied to the sending end side, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The embodiments of the present application further provide a readable storage medium, where a program or an instruction is stored on the computer readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements the processes of the embodiment of the information transmission method applied to the sending end side, and can achieve the same technical effects, and in order to avoid repetition, details are not repeated here.

The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

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

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

Those skilled in the art will appreciate that the terminal 1200 may further comprise a power source (e.g., a battery) for supplying power to various components, and the power source may be logically connected to the processor 1210 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 12 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that, in the embodiment of the present application, the input Unit 1204 may include a Graphics Processing Unit (GPU) 12041 and a microphone 12042, and the Graphics Processing Unit 12041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. 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. A touch panel 12071, also referred to as a touch screen. The touch panel 12071 may include two parts of a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment of the application, the radio frequency unit 1201 receives downlink data from a network side device and then processes the downlink data to the processor 1210; in addition, the uplink data is sent to the network side equipment. Typically, 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 may be used to store software programs or instructions and various data. The memory 1209 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 1209 may include a high-speed random access Memory, and may further include a nonvolatile Memory, which may be a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1210 may include one or more processing units; alternatively, processor 1210 may integrate an application processor, which handles primarily the operating system, user interface, and applications or instructions, etc., and a modem processor, which handles primarily wireless communications, such as a baseband processor. It is to be appreciated that the modem processor described above may not be integrated into processor 1210.

Wherein, the processor 1210 is configured to:

performing cyclic shift on the delay Doppler information on the L antennas respectively to acquire first information corresponding to each antenna;

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

wherein L is an integer greater than or equal to 1.

Optionally, the cyclic shift comprises at least one of:

cyclic shift in the delay direction;

cyclic shift in the doppler direction.

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

at the l antenna, delay Doppler information is delayed along the last d of the delay direction _l Position on head d _l Bit, remaining M-d _l Bit is sequentially moved backward by d _l A bit; or

Alternatively, d _l The determination method comprises the following steps:

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

Optionally, in case the cyclic shift comprises a cyclic shift in the doppler direction, the processor 1210 is configured to implement:

at the l antenna, the last p of the delay Doppler information along the Doppler direction _l Bit placed at the head p _l In bits, the remaining N-p _l The bits are sequentially shifted backwards by p _l A bit; or alternatively

On the l antenna, the front p of the delay Doppler information along the Doppler direction _l P with bits placed at the tail _l In bits, the remaining N-p _l Bit is sequentially shifted forward by p _l A bit;

wherein p is _l Is the number of shifts in the Doppler direction on the l antenna, p _l 1,N is the total number of indices of delayed doppler information in the doppler direction, L =1,2, …, L.

Alternatively, p _l The determination method comprises the following steps:

according to the formula: p is a radical of _l ＝(l-1)k _max Determining;

Optionally, in case the cyclic shift comprises a cyclic shift in a delay direction and a cyclic shift in a doppler direction, the processor 1210 is configured to implement:

where L =1,2, …, L.

Optionally, the delay doppler domain in the delay doppler information is provided with a first guard interval.

Wherein l _max ＝τ _max MΔf，τ _max Δ f is the subcarrier spacing in the time-frequency domain, d, for the maximum delay of the channel _max ＝max{d ₁ ，d ₂ ，…d _L }，k _max ＝v _max NT，v _max For maximum Doppler of the channel, T is the symbol duration in the time-frequency domainM, T =1/Δ f, p _max ＝max{p ₁ ，p ₂ ，…p _L }。

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

Width in Doppler domain greater than or equal to 4k _max +1；

Optionally, the position of the first protection interval is set by a protocol convention or a sending end;

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

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

Optionally, the processor 1210 is configured to implement:

wherein the second guard interval is set at least one of:

a preset delay domain position;

a preset doppler domain position.

Optionally, the processor 1210 is configured to implement:

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

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

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

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

wherein the second guard interval is set at least one of:

a preset time domain position;

a predetermined frequency domain position.

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

all 0's are configured;

a cyclic prefix;

a cyclic suffix.

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

Optionally, the target information comprises at least one of:

radio resource control, RRC, signaling;

layer one signaling of a Physical Downlink Control Channel (PDCCH);

information carried on a Physical Downlink Shared Channel (PDSCH);

the media access control layer controls the signaling of the unit MAC CE;

a system information block SIB;

layer one signaling of a Physical Uplink Control Channel (PUCCH);

message one MSG 1 of physical random access channel PRACH;

message two of PRACH MSG 2;

message three MSG 3 of PRACH;

message four MSG 4 of PRACH;

message a MSG a of PRACH;

message B MSG B of PRACH;

information carried on a Physical Uplink Shared Channel (PUSCH);

xn interface signaling;

PC5 interface signaling;

direct link interface signaling.

Optionally, as shown in fig. 13, an embodiment of the present application further provides a communication device 1300, which includes a processor 1301, a memory 1302, and a program or an instruction that is stored in the memory 1302 and is executable on the processor 1301, for example, when the communication device 1300 is a sending end, the program or the instruction is executed by the processor 1301 to implement each process of the information transmission method embodiment, and the same technical effect can be achieved, and details are not repeated here to avoid repetition.

A terminal as referred to in embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection capability, or other processing device connected to a wireless modem, etc. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be referred to as a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, e.g., a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.

The network side device according to the embodiment of the present application may be a Base Station (BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), may also be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may also be an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, or a relay Station or an Access point, or a Base Station in a future 5G network, and the like, which are not limited herein.

The network-side device and the terminal may each use one or more antennas to perform Multiple-Input Multiple-Output (MIMO) transmission, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the above information transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.

The embodiments of the present application further provide a computer program/program product, where 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 implement the processes of the above-mentioned embodiments of the information transmission method, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, 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 will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An information transmission method, comprising:

wherein L is an integer greater than or equal to 1.

2. The method of claim 1, wherein the cyclic shift comprises at least one of:

cyclic shift in the delay direction;

cyclic shift in the doppler direction.

3. The method of claim 2, wherein in case that the cyclic shift comprises a cyclic shift in a delay direction, the transmitting end performs cyclic shift on the delay doppler information on L antennas respectively, comprising:

on the l antenna, delay Doppler information is delayed along the last d of the delay direction _l Position on head d _l Bit, remaining M-d _l Bit is moved backward in sequence by d _l A bit; or alternatively

wherein, d _l For the number of shifts in the delay direction on the l-th antenna, d _l 1,M is the total number of indices of the delay doppler information in the delay direction, L =1,2, …, L.

4. A method according to claim 3, characterized in that d is _l The determination method comprises the following steps:

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

5. The method of claim 2, wherein in the case that the cyclic shift comprises a cyclic shift in a doppler direction, the transmitting end performs cyclic shift on the delay doppler information on L antennas respectively, and the method comprises:

at the l antenna, the last p of the delay Doppler information along the Doppler direction _l Bit-at-head p _l In bits, the remaining N-p _l The bits are sequentially shifted backwards by p _l A bit; or

On the first antenna, the front p of the delay Doppler information along the Doppler direction _l Bit placed at tail p _l In bits, the remaining N-p _l Bit sequence forward shift by p _l A bit;

wherein p is _l Is the number of shifts in the Doppler direction, p, on the ith antenna _l Greater than or equal to 1,N is the total number of indices of the delayed doppler information in the doppler direction, L =1,2, …, L.

6. The method of claim 5, wherein p is _l The determination method comprises the following steps:

7. The method according to any of claims 2-6, wherein in case that the cyclic shift comprises a cyclic shift in a delay direction and a cyclic shift in a Doppler direction, the transmitting end performs cyclic shift on the delayed Doppler information on L antennas respectively, comprising:

performing cyclic shift on the delay Doppler information along the Doppler direction on the l antenna, and performing cyclic shift on the delay Doppler information after cyclic shift along the delay direction; or alternatively

Performing cyclic shift on the delay Doppler information along the delay direction on the l antenna, and performing cyclic shift on the delay Doppler information subjected to cyclic shift along the Doppler direction;

where L =1,2, …, L.

8. The method of any of claims 2-7, wherein a delay-Doppler domain in the delay-Doppler information is provided with a first guard interval.

9. The method of claim 8, wherein the size of the first guard interval satisfies at least one of the following when the position of the first guard interval varies with cyclic shift:

in the case of cyclic shift in 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, a width in the Doppler domain greater than or equal to 4k _max +1；

Wherein l _max ＝τ _max MΔf，τ _max Δ f is the subcarrier spacing in the time-frequency domain, d, for the maximum delay of the channel _max ＝max{d ₁ ，d ₂ ，...d _L }，k _max ＝v _max NT，v _max For maximum doppler of the channel, T is the symbol duration in the time-frequency domain, T =1/Δ f, p _max ＝max{p ₁ ，p ₂ ，...p _L }。

10. The method of claim 8, wherein the size of the first guard interval is satisfied when the position of the first guard interval does not change with cyclic shift:

Width in Doppler domain greater than or equal to 4k _max +1；

11. The method of claim 8, wherein the location of the first guard interval is set by a protocol agreement or a sender;

and under the condition that the position of the first protection interval is set by a sending end, the sending end sends the position of the first protection interval to a receiving end through target information.

12. The method of claim 8, wherein a pilot is set in the first guard interval.

13. The method of claim 12, wherein the position of the pilot is not changed with cyclic shift or is changed with cyclic shift.

14. The method of claim 12, wherein the pilot is set according to a manner comprising: at least one of a burst 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 a protocol convention or a sending end;

16. The method of claim 1, wherein the transmitting end performs cyclic shift on the delay doppler information on L antennas respectively to obtain first information corresponding to each antenna, and the method includes:

17. The method of claim 16, wherein the phase offset corresponding to each antenna is set by a protocol convention or a transmitting end;

18. The method of claim 1, wherein a second guard interval is set in a doppler domain in the delay-doppler information;

wherein the second guard interval is set at least one of:

a preset delay domain position;

a preset doppler domain position.

19. The method of claim 1, wherein the transmitting end respectively transmits the first information through the L antennas, and wherein the transmitting end includes:

and the transmitting end transmits the third information through the L antennas respectively.

20. The method of claim 19, wherein a second guard interval is provided in the second information;

wherein the second guard interval is set to at least one of:

a preset time domain position;

a predetermined frequency domain position.

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

are configured as all 0 s;

a cyclic prefix;

a cyclic suffix.

22. The method according to claim 18 or 20, wherein the location of the second guard interval is set by a protocol convention or a sending end;

23. The method of claim 1, wherein the shift information of the cyclic shift is set by a protocol convention or a sender;

24. The method of claim 11, 15, 17, 22 or 23, wherein the target information comprises at least one of:

radio resource control, RRC, signaling;

layer one signaling of a Physical Downlink Control Channel (PDCCH);

information carried on a Physical Downlink Shared Channel (PDSCH);

the signaling of a Media Access Control (MAC) CE unit;

a system information block SIB;

layer one signaling of a Physical Uplink Control Channel (PUCCH);

message one MSG 1 of physical random access channel PRACH;

message two MSG2 of PRACH;

message three MSG 3 of PRACH;

message four MSG 4 of PRACH;

message a MSG a of PRACH;

message B MSG B of PRACH;

information carried on a Physical Uplink Shared Channel (PUSCH);

xn interface signaling;

PC5 interface signaling;

direct link interface signaling.

25. An information transmission apparatus applied to a transmitting end, comprising:

the acquisition module is used for respectively carrying out cyclic shift on the delay Doppler information on the L antennas to acquire 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 transmitting end, characterized by comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the information transmission method according to any one of claims 1 to 24.

27. A readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the information transmission method according to any one of claims 1 to 24.