Information transmission method and device and sending end

Abstract

The application discloses an information transmission method and device and a sending end, and applies to the technical field of communication. The method comprises the following steps: a sending end cyclically shifts delay Doppler information on L roots of antennas respectively, and obtains first information corresponding to each root of antenna; and the sending end respectively sends the first information through the L roots of antennas; wherein, L is an integer greater than or equal to 1.

Description

Technical Field

[0001] This application belongs to the field of communications, and specifically relates to an information transmission method, apparatus and transmitting end. Background Technology

[0002] Currently, there is no mature solution for multi-antenna technology in the delayed Doppler domain. Due to the two-dimensional convolution relationship between delayed Doppler domain information and the channel, multi-antenna schemes in traditional Orthogonal Frequency Division Multiplexing (OFDM) systems cannot be directly applied in the delayed Doppler domain. Furthermore, existing multi-antenna transmission schemes in the delayed Doppler domain also suffer from high precoding complexity and large channel information feedback requirements. Summary of the Invention

[0003] This application provides an information transmission method, apparatus, and transmitter that can solve the problems of high precoding complexity and large channel information feedback in existing multi-antenna transmission schemes in the delayed Doppler domain.

[0004] Firstly, an information transmission method is provided, including:

[0005] The transmitting end performs cyclic shifting of the delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna;

[0006] The transmitting end transmits the first information through the L antennas respectively;

[0007] Where L is an integer greater than or equal to 1.

[0008] Secondly, an information transmission device is provided, comprising:

[0009] The acquisition module is used to cyclically shift the delayed Doppler information on each of the L antennas to acquire the first information corresponding to each antenna.

[0010] The transmitting module is used to transmit the first information through the L antennas respectively;

[0011] Where L is an integer greater than or equal to 1.

[0012] Thirdly, a transmitting end is provided, including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0013] Fourthly, a transmitting end is provided, including a processor and a communication interface, wherein the processor is used to cyclically shift delayed Doppler information on L antennas respectively to obtain first information corresponding to each antenna; the communication interface is used to transmit the first information through the L antennas respectively.

[0014] Where L is an integer greater than or equal to 1.

[0015] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0016] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the steps of the method described in the first aspect.

[0017] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to perform the steps of the method as described in the first aspect.

[0018] In this embodiment of the application, by cyclically shifting the delayed Doppler information on L antennas respectively to obtain the first information corresponding to each antenna, and transmitting the first information through L antennas respectively, the precoding complexity can be reduced, the channel information feedback amount can be reduced, and the diversity gain in the delayed Doppler domain can be obtained. Attached Figure Description

[0019] Figure 1 This is a block diagram of a wireless communication system applicable to embodiments of this application;

[0020] Figure 2 This is a flowchart illustrating the information transmission method according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of cyclic shifting along the delay direction;

[0022] Figure 4 This is a schematic diagram of cyclic displacement along the Doppler direction;

[0023] Figure 5 This is a schematic diagram showing the fixed pilot and first guard interval positions during cyclic shifting along the delay direction;

[0024] Figure 6 This is a schematic diagram showing the changes in the pilot and first guard interval positions as the system cyclically shifts along the delay direction.

[0025] Figure 7This is a schematic diagram showing the fixed pilot and first guard interval positions during cyclic shifting along the Doppler direction;

[0026] Figure 8 This is a schematic diagram showing the changes in the pilot and first guard interval positions as the Doppler direction changes with cyclic shift.

[0027] Figure 9 This is a communication flowchart of an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the information transmission device according to an embodiment of this application;

[0029] Figure 11 This is one of the structural block diagrams of the sending end in an embodiment of this application;

[0030] Figure 12 This is the second structural block diagram of the sending end in an embodiment of this application;

[0031] Figure 13 This is a structural block diagram of a communication device according to an embodiment of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can 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 this application are often used interchangeably, and the described technologies can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0035] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any 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 this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0036] The relevant technologies involved in this application are described below:

[0037] Background of multi-antenna technology in Orthogonal Time-Frequency Space (OTFS):

[0038] Currently, multi-antenna transmission schemes in the delayed Doppler domain are still under research, mainly including open-loop and closed-loop schemes. Open-loop schemes refer to those with channel information feedback, where the transmitter can perform precoding and other operations based on the feedback channel information. Closed-loop schemes refer to those without channel information feedback, where the transmitter directly manipulates the symbols. Regarding closed-loop transmission schemes:

[0039] (1) Scheme based on analog beamforming:

[0040] Simulated beamforming distinguishes different users in the angular domain. However, this only enables single-stream transmission per user because the angular domain resolution is sufficient to differentiate users, while multi-stream transmission requires digital precoding.

[0041] (2) Spatial multiplexing scheme (digital precoding)

[0042] First, based on the vectorized representation of the delayed Doppler domain, the channels of multiple transceiver antenna pairs are concatenated into a high-dimensional equivalent channel matrix. Then, digital precoding is performed based on this high-dimensional equivalent channel matrix to distinguish between multi-stream or multi-user data. However, a drawback of this scheme is that the dimensionality of the equivalent multiple-input multiple-output (MIMO) matrix is ​​extremely large, resulting in very high precoding complexity.

[0043] (3) Tomlinson-Harashima Precoding (THP) scheme

[0044] Assuming the transmitter has obtained channel state information through feedback, the equivalent channel matrix in the delayed Doppler domain can be decomposed to eliminate interference between individual symbols at different layers. However, this scheme requires serial operation on each transmitted symbol, resulting in high computational complexity.

[0045] In rapidly changing time-varying systems, feedback of channel information increases the transmitter's delay, causing a significant discrepancy between the current channel state and the feedback information. This leads to a mismatch between the transmitter's transmission scheme and the current channel state, thus negating the purpose of channel feedback. Currently, the following are some open-loop OTFS multi-antenna schemes:

[0046] (1) Transmission diversity scheme

[0047] Diversity gain is achieved by performing space-time coding at the granularity of multiple consecutive delayed Doppler frames. This scheme assumes that the channels of multiple consecutive delayed Doppler frames are identical. However, due to the varying characteristics of the channel and the large granularity of the delayed Doppler frames, the channels of multiple consecutive delayed Doppler frames are actually not identical, making direct space-time coding unsuitable.

[0048] (2) Uplink-assisted transmission scheme

[0049] By leveraging the angle, delay, and Doppler heterogeneity of the uplink and downlink, the angle, delay, and Doppler information of each user are estimated through uplink pilots, and signals from different users are detected at different angles. Finally, based on the estimated angle direction of each user, a separate beamforming vector is formed to avoid interference between multiple users. However, this scheme requires the heterogeneity of the uplink and downlink channels and cannot achieve multi-stream transmission for a single user.

[0050] Currently, there is no engineering-feasible multi-antenna transmission scheme in the delayed Doppler domain. This application proposes a transmission method with cyclic shifting of information in the delayed Doppler domain, which is an open-loop multi-antenna transmission scheme under single-layer data. By cyclically shifting the delayed Doppler frames in the delayed domain or the Doppler domain on different antennas, diversity gain in the delayed Doppler domain is obtained.

[0051] The information transmission method, apparatus, and sending end provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0052] like Figure 2 As shown in the figure, this application provides an information transmission method, including:

[0053] Step 201: The transmitting end performs cyclic shifting of the delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna.

[0054] It should be noted that L is an integer greater than or equal to 1.

[0055] It should be noted that this application mainly addresses how to transmit information when the transmitter has multiple antennas. In other words, in practical applications, the number of antennas at the transmitter is usually greater than or equal to 2.

[0056] Step 202: The transmitting end transmits the first information through L antennas respectively;

[0057] It should be noted that in this embodiment, the transmitting end modulates the information (symbols) to be transmitted and carries it in the delayed Doppler domain to obtain delayed Doppler information. Since there are L antennas transmitting information, the delayed Doppler information is cyclically shifted for each antenna to obtain the first information corresponding to each antenna. Then, the first information corresponding to each antenna (it should be noted that although they are all called first information, the first information corresponding to different antennas is not the same) is sent to the receiving end using each antenna. For example, if the transmitting end uses two antennas to transmit information, the delayed Doppler information is cyclically shifted for antenna 1 to obtain information one, and the delayed Doppler information is cyclically shifted for antenna 2 to obtain information two. Then, information one is sent through antenna 1 and information two is sent through antenna 2. By cyclically shifting the delayed Doppler frame in the delayed domain or the Doppler domain on different antennas, diversity gain in the delayed Doppler domain is obtained, reducing precoding complexity and reducing channel information feedback.

[0058] It should be further noted that the cyclic shift mentioned in the embodiments of this application includes at least one of the following:

[0059] Cyclic shift along the delay direction;

[0060] Cyclic shift along the Doppler direction.

[0061] The different cyclic shift methods are explained in detail below.

[0062] Case 1: The cyclic shift includes a cyclic shift along the delay direction.

[0063] Specifically, in this case, step 201 can be implemented in one of the following ways:

[0064] A11. On the l-th antenna, the delayed Doppler information is transmitted along the delay direction for the last d... l The d position is placed at the head. l In position, the remaining Md l The position is shifted sequentially backward by d. l Bit;

[0065] A12. On the l-th antenna, the delayed Doppler information is transmitted along the delay direction in the first d... l The d position is located at the tail. l In position, the remaining Md l The position moves forward by d in sequence. l Bit;

[0066] It should be noted that d l d represents the number of shifts along the delay direction on the l-th antenna. lGreater than or equal to 1, M is the total number of indices of delayed Doppler information in the delay direction, that is, the number of subcarriers in the frequency domain, which can also be regarded as the total number of grids of delayed Doppler information in the delay direction, l = 1, 2, ..., L.

[0067] It should be noted here that d l The method for determining it is as follows:

[0068] According to the formula: d l =(l-1)l max Sure;

[0069] Among them, l max =τ max MΔf,τ max Δf represents the maximum delay of the channel, and Δf represents the subcarrier spacing in the time-frequency domain.

[0070] In other words, first determine the number of shifts along the delay direction on each antenna, and then perform cyclic shifting according to this number of shifts. For example, if the final determined number of shifts along the delay direction on antenna 1 is 1 bit, and the final determined number of shifts along the delay direction on antenna 2 is 2 bits, then on antenna 1, the last bit of the delayed Doppler information along the delay direction can be placed in the first bit at the beginning, and the remaining M-1 bits can be shifted one bit to the right. On antenna 2, the last two bits of the delayed Doppler information along the delay direction can be placed in the first two bits, and the remaining M-2 bits can be shifted two bits to the right. Alternatively, on antenna 1, the first bit of the delayed Doppler information along the delay direction can be placed in the last bit, and the remaining M-1 bits can be shifted one bit to the left and one bit to the right. On antenna 2, the first two bits of the delayed Doppler information along the delay direction are placed on the last two bits, and the remaining M-2 bits are shifted forward by two bits. Alternatively, on antenna 1, the last bit of the delayed Doppler information along the delay direction is placed on the first bit, and the remaining M-1 bits are shifted backward by one bit. On antenna 2, the first two bits of the delayed Doppler information along the delay direction are placed on the last two bits, and the remaining M-2 bits are shifted forward by two bits. Alternatively, on antenna 1, the first bit of the delayed Doppler information along the delay direction is placed on the last bit, and the remaining M-1 bits are shifted forward by one bit. On antenna 2, the last two bits of the delayed Doppler information along the delay direction are placed on the first two bits, and the remaining M-2 bits are shifted backward by two bits.

[0071] For example, taking the three antennas at the transmitting end as an example, the results of cyclic shifting along the delay direction are given. The delayed Doppler information of each antenna after cyclic shifting is as follows: Figure 3 As shown.

[0072] Case 2: The cyclic shift includes cyclic shift along the Doppler direction.

[0073] Specifically, in this case, step 201 can be implemented in one of the following ways:

[0074] B11. On the l-th antenna, the last p-th segment of the delayed Doppler information along the Doppler direction... l The p is placed at the head. l In the remaining Np positions l The position is shifted sequentially backward by p. l Bit;

[0075] B12. On the l-th antenna, the delayed Doppler information is transmitted along the Doppler direction in the first p... l p is placed at the tail l In the remaining Np positions l The position moves forward by p in sequence. l Bit;

[0076] It should be noted that p l p represents the number of shifts along the Doppler direction on the l-th antenna. l Greater than or equal to 1, N is the total number of indices of delayed Doppler information in the Doppler direction, which is also the number of symbols in the time domain, and can also be regarded as the total number of grids of delayed Doppler information in the Doppler direction, l = 1, 2, ..., L.

[0077] It should be noted here that p l The method for determining it is as follows:

[0078] According to the formula: p l =(l-1)k max Sure;

[0079] Where, k max =v max NT, v max Let T be the maximum Doppler of the channel, T be the symbol duration in the time-frequency domain, T = 1 / Δf, and Δf be the subcarrier spacing in the time-frequency domain.

[0080] In other words, first determine the number of shifts along the Doppler direction on each antenna, and then perform cyclic shifting according to this number of shifts. For example, if the final determined number of shifts along the Doppler direction on antenna 1 is 1 bit, and the final determined number of shifts along the Doppler direction on antenna 2 is 2 bits, then on antenna 1, the last bit of the delayed Doppler information along the Doppler direction can be placed in the first bit at the beginning, and the remaining N-1 bits can be shifted one bit to the right. On antenna 2, the last two bits of the delayed Doppler information along the Doppler direction can be placed in the first two bits at the beginning, and the remaining N-2 bits can be shifted two bits to the right. Alternatively, on antenna 1, the first bit of the delayed Doppler information along the Doppler direction can be placed in the last bit at the end, and the remaining N-1 bits can be shifted one bit to the left. On antenna 2, the first two bits of the delayed Doppler information along the Doppler direction are placed in the last two bits, and the remaining N-2 bits are shifted forward by two bits in sequence. Alternatively, on antenna 1, the last bit of the delayed Doppler information along the Doppler direction is placed in the first bit, and the remaining N-1 bits are shifted backward by one bit in sequence. On antenna 2, the first two bits of the delayed Doppler information along the Doppler direction are placed in the last two bits, and the remaining N-2 bits are shifted forward by two bits in sequence. Alternatively, on antenna 1, the first bit of the delayed Doppler information along the Doppler direction is placed in the last bit, and the remaining N-1 bits are shifted forward by one bit in sequence. On antenna 2, the last two bits of the delayed Doppler information along the Doppler direction are placed in the first two bits, and the remaining N-2 bits are shifted backward by two bits in sequence.

[0081] For example, taking the three antennas at the transmitting end as an example, the results of cyclic shifting along the Doppler direction are given. The delayed Doppler information of each antenna after cyclic shifting is as follows: Figure 4 As shown.

[0082] Case 3: The cyclic shift includes cyclic shift along the delay direction and cyclic shift along the Doppler direction.

[0083] Specifically, in this case, step 201 can be implemented in one of the following ways:

[0084] C11. On the l-th 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.

[0085] C12. On the l-th 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.

[0086] It should be noted that when cyclic shifting in both the delay direction and the Doppler direction is required on each antenna, the cyclic shifting in the delay direction can be performed first, followed by the cyclic shifting in the Doppler direction, or vice versa. Specifically, the methods for performing cyclic shifting in both the delay direction and the Doppler direction can be found in the implementation methods of Case 1 and Case 2 above, and will not be repeated here.

[0087] It should be further noted that the delayed Doppler domain in the delayed Doppler information is provided with a first guard interval, which contains pilot signals. In other words, the first guard interval is set to prevent mutual interference between the pilot signals and the data, which could lead to inaccurate channel estimation.

[0088] Specifically, the location of the first protection interval may or may not change with the cyclic shift. The size settings of the first protection interval under different conditions are explained below.

[0089] Scenario 1: The position of the first protection interval changes with the cyclic shift.

[0090] Specifically, in this case, the size of the first protection interval satisfies at least one of the following:

[0091] D11. When performing cyclic shifting along the delay direction, the width of the first protection interval in the delay domain is greater than or equal to 2 (l max +d max +1, the width in the Doppler domain is greater than or equal to 4k max +1;

[0092] It should be noted that d max =max{d1, d2, ... d L}

[0093] 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, the width in the Doppler domain is greater than or equal to 4 (k max +p max )+1;

[0094] It should be noted that p max =max{p1, p2, ... p L}

[0095] Scenario 2: The position of the first protection interval does not change with cyclic shifting.

[0096] Specifically, in this case, the size of the first protection interval satisfies:

[0097] E11, The width of the delay domain is greater than or equal to 2l max +1, or the width of the delay domain is greater than or equal to (L+1)l. max +L;

[0098] E12, The width of the Doppler domain is greater than or equal to 4k. max +1.

[0099] It should also be noted that the location of the first protection interval can be agreed upon by the protocol or set by the sending end.

[0100] Optionally, if the location of the first protection interval is set by the transmitting end, the transmitting end sends the location of the first protection interval to the receiving end through target information.

[0101] Optionally, the target information includes at least one of the following:

[0102] F101, Radio Resource Control (RRC) signaling;

[0103] F102, Layer 1 signaling of the Physical Downlink Control Channel (PDCCH);

[0104] F103, Information carried on the Physical Downlink Shared Channel (PDSCH);

[0105] F104, Signaling of the Media Access Control Layer Control Unit (MAC CE);

[0106] F105, System Information Block (SIB);

[0107] F106, Layer 1 signaling of the Physical Uplink Control Channel (PUCCH);

[0108] F107, Message 1 (MSG 1) of the Physical Random Access Channel (PRACH);

[0109] F108, PRACH message 2 (MSG 2);

[0110] F109, PRACH Message 3 (MSG 3);

[0111] F110, PRACH Message 4 (MSG 4);

[0112] F111, PRACH message A (MSG A);

[0113] F112, PRACH message B (MSG B);

[0114] F113, Information carried on the Physical Uplink Shared Channel (PUSCH);

[0115] F114, Xn interface signaling;

[0116] F115 and PC5 interface signaling;

[0117] F116, Direct Link Interface Signaling (Side Link Interface Signaling).

[0118] It should be further noted that the location of the pilot signal may remain unchanged or may change with the cyclic shift.

[0119] Furthermore, the pilot signal can be configured in at least one of pulse pilot and sequence pilot.

[0120] Optionally, the pilot information corresponding to the pilot can be agreed upon by the protocol or 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 value.

[0121] Optionally, if the pilot information corresponding to the pilot is set by the transmitting end, the transmitting end sends the pilot information corresponding to the pilot to the receiving end through the target information.

[0122] For example, two schemes for placing pilots and the first guard interval are given, taking cyclic shifting along the delay direction as an example.

[0123] Option 1: Taking the three antennas at the transmitting end as an example, if the positions of the pilot and the first guard interval do not change with the cyclic shift, then the delay Doppler information of each antenna is as follows: Figure 5 As shown.

[0124] To prevent data from interfering with the pilot signal and the pilot signals between different antennas, the first guard interval is set at 2k along the Doppler direction on both sides of the pilot signal. max Along the delay direction on both sides of the pilot, l max Within the grid, the delay positions of the pilots between different antennas differ by l. max .

[0125] Option 2: Taking the three antennas at the transmitting end as an example, if the positions of the pilot and the first guard interval change with the cyclic shift, then the delay Doppler information of each antenna is as follows: Figure 6 As shown, it should be noted that in this case, the pilot signals corresponding to different antennas in the delayed Doppler domain of the delayed Doppler information can be the same or different. Figure 6 This indicates that the pilot frequency is different on each antenna.

[0126] To prevent data from interfering with the pilot signal and the pilot signals between different antennas, the first guard interval is set at l on both sides of the pilot signal along the delay direction.max +d max And along the Doppler direction at 2k on both sides of the pilot frequency. max Within the grid points. Where, d max =max{d1,d2,…,d L In this example, d max =d3.

[0127] Taking the cyclic shift along the Doppler direction as an example, two schemes for placing the pilot and the first guard interval are given.

[0128] Option 1: Taking the three antennas at the transmitting end 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 follows: Figure 7 As shown:

[0129] To prevent data from interfering with the pilot signal and the pilot signals between different antennas, the first guard interval is set at 2k along the Doppler direction on both sides of the pilot signal. max Along the delay direction on both sides of the pilot, l max Within the grid, the delay positions of the pilots between different antennas differ by l. max .

[0130] Option 2: Taking the two transmitting antennas as an example, if the positions of the pilot and the first guard interval change with the cyclic shift, the delay Doppler information of each antenna is as follows: Figure 8 As shown, it should be noted that in this case, the pilot signals corresponding to different antennas in the delayed Doppler domain of the delayed Doppler information can be the same or different. Figure 8 This indicates that the pilot frequency is different on each antenna.

[0131] To prevent data from interfering with the pilot signal and the pilot signals between different antennas, the first guard interval is set at l on both sides of the pilot signal along the delay direction. max And along the Doppler direction on both sides of the pilot frequency 2(k max +p max Within the grid points. Where, p max =max{p1,p2,…,p L In this example, p max =p2.

[0132] It should also be noted that one optional implementation of step 201 is as follows:

[0133] The transmitting end multiplies the delayed Doppler information with the phase offset corresponding to each of the L antennas to obtain the first delayed Doppler information for each antenna.

[0134] The transmitting end performs cyclic shifting of the first delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna.

[0135] It should be noted that when setting a phase offset for an antenna, before performing cyclic shifting of the delayed Doppler information, the delayed Doppler information needs to be multiplied by the phase offset corresponding to the antenna, and then the cyclic shifting is performed. It should also be noted that since there are multiple antennas at the transmitting end, some of the antennas may have phase offsets, while others may not have phase offsets; and the phase offsets of different antennas may be the same or different.

[0136] Optionally, the phase offset corresponding to each antenna can be agreed upon by a protocol or set by the transmitting end.

[0137] Optionally, when the phase offset corresponding to each antenna is set by the transmitting end, the transmitting end sends the phase offset corresponding to each antenna to the receiving end through target information.

[0138] Optionally, in order to prevent the currently transmitted information from interfering with other information, a second protection interval may be set in the Doppler domain of the delayed Doppler information in this embodiment of the application;

[0139] The second protection interval is provided in at least one of the following locations:

[0140] H11, Preset delay domain position;

[0141] H12, the preset Doppler domain position.

[0142] It should be further noted that the second protection interval satisfies at least one of the following:

[0143] H21, configured as all zeros;

[0144] H22, Cyclic prefix;

[0145] H23, cyclic suffix.

[0146] Optionally, the location of the second protection interval can be agreed upon by the protocol or set by the sending end; if the location of the second protection interval is set by the sending end, the sending end sends the location of the second protection interval to the receiving end through target information.

[0147] It should also be noted that since the final antenna transmits a time-domain signal, the transmitting end needs to convert the delayed Doppler information into a time-domain signal before transmitting the first information. Specifically, step 202 in this embodiment is implemented as follows:

[0148] The transmitting end transforms the first information into the time-frequency domain to obtain the second information;

[0149] The transmitting end transforms the second information into the time domain to obtain the third information;

[0150] The transmitting end transmits the third information through L antennas respectively.

[0151] Optionally, the second information includes a second protection interval;

[0152] The second protection interval is provided in at least one of the following locations:

[0153] H21, Preset time domain location;

[0154] H22, preset frequency domain position.

[0155] It should be noted that the second protection interval can be set in the Doppler domain of the delayed Doppler information or in the second information. In general, it is sufficient to add the second protection interval in either the Doppler domain or the second information.

[0156] It should also be noted that, under normal circumstances, the shift information of the cyclic shift needs to be known by both the sending end and the receiving end. Specifically, the shift information of the cyclic shift can be agreed upon by the protocol or set by the sending end. 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.

[0157] Optionally, if the shift information is set by the sending end, the sending end sends the shift information to the receiving end through the target information.

[0158] Furthermore, it should be noted that if at least two of the following are notified by the transmitting end: the cyclic shift information, 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, the transmitting end can notify this information through the same signaling, for example, by notifying the cyclic shift information and the location of the second guard interval through SIB; alternatively, the transmitting end can also notify this information through different signaling, for example, by notifying the cyclic shift information through MSG2 and by notifying the location of the second guard interval through MSG 4.

[0159] It should be noted that the sending end can be a terminal and the receiving end can also be a terminal; or the sending end can be a network-side device and the receiving end can be a terminal; or the sending end can be a terminal and the receiving end can be a network-side device.

[0160] The communication process corresponding to the embodiments of this application is as follows: Figure 9 As shown, the delayed Doppler information X is cyclically shifted for each antenna to obtain the first information (X) corresponding to each antenna. lThen, pilot signals and a first guard interval are added to the delayed Doppler domain of the first information. The first information is then modulated using OTFS, and a second guard interval is added in the time domain. Finally, the transformed delayed Doppler information is sent to the receiving end through the antenna.

[0161] It should also be noted that this application can be extended to other transform domains besides OTFS (such as Walsh-Hadar code (WHT) transform, and Discrete Cosine Transform (DCT) transmission technologies). The cyclic shift operation in the delayed Doppler domain involved in this application is also the same cyclic shift operation in the other transform domains mentioned above; the cyclic shift operation mentioned in this application can also be performed in the delayed time domain; the embodiments of this application can achieve the equivalent effect of cyclic shift by adding a cyclic prefix or cyclic suffix in the delayed Doppler domain.

[0162] It should be noted that the embodiments of this application propose a transmission scheme that cyclically shifts the delayed Doppler domain. The cyclic shift operation is performed in the delay domain or the Doppler domain. The cyclic shift in the delay domain is the maximum delay spread, and the cyclic shift in the Doppler domain is the maximum Doppler spread. The transmission scheme after the shift achieves delay diversity or Doppler diversity. Compared with the existing delayed Doppler domain transmission schemes, the delayed Doppler domain cyclic shift transmission scheme of the embodiments of this application does not require additional overhead, is simple to operate, and only requires cyclic shifting of the delayed Doppler frame, making it more feasible for engineering implementation in practice.

[0163] It should be noted that the information transmission method provided in this application embodiment can be executed by an information transmission device, or by a control module within the information transmission device for executing the information transmission method. This application embodiment uses an information transmission device executing the information transmission method as an example to illustrate the information transmission device provided in this application embodiment.

[0164] like Figure 10 As shown, this application embodiment provides an information transmission device 1000, applied at a sending end, including:

[0165] The acquisition module 1001 is used to cyclically shift the delayed Doppler information on L antennas respectively to acquire the first information corresponding to each antenna;

[0166] Transmission module 1002 is used to transmit the first information through the L antennas respectively;

[0167] Where L is an integer greater than or equal to 1.

[0168] Optionally, the cyclic shift includes at least one of the following:

[0169] Cyclic shift along the delay direction;

[0170] Cyclic shift along the Doppler direction.

[0171] Optionally, when the cyclic shift includes a cyclic shift along the delay direction, the acquisition module 1001 is configured to:

[0172] On the l-th antenna, the last d-th segment of the delayed Doppler information along the delay direction is... l The d position is placed at the head. l In position, the remaining Md l The position is shifted sequentially backward by d. l Position; or

[0173] On the l-th antenna, the delayed Doppler information is forwarded along the delay direction by the first d... l The d position is located at the tail. l In position, the remaining Md l The position moves forward by d in sequence. l Bit;

[0174] Where, d l d represents the number of shifts along the delay direction on the l-th antenna. l Greater than or equal to 1, M is the total number of indices of delayed Doppler information in the delay direction, l = 1, 2, ..., L.

[0175] Optionally, d l The method for determining it is as follows:

[0176] According to the formula: d l =(l-1)l max Sure;

[0177] Among them, l max =τ max MΔf,τ max Δf represents the maximum delay of the channel, and Δf represents the subcarrier spacing in the time-frequency domain.

[0178] Optionally, when the cyclic shift includes a cyclic shift along the Doppler direction, the acquisition module 1001 is configured to:

[0179] On the l-th antenna, the last p-th delay of the Doppler information along the Doppler direction is... l The p is placed at the head. l In the remaining Np positions l The position is shifted sequentially backward by p. l Position; or

[0180] On the l-th antenna, the delayed Doppler information is forwarded along the Doppler direction for the first p... l p is placed at the tail l In the remaining Np positions l The position moves forward by p in sequence. lBit;

[0181] Where, p l p represents the number of shifts along the Doppler direction on the l-th antenna. l Greater than or equal to 1, N is the total number of indices of delayed Doppler information in the Doppler direction, l = 1, 2, ..., L.

[0182] Optionally, p l The method for determining it is as follows:

[0183] According to the formula: p l =(l-1)k max Sure;

[0184] Where, k max =v max NT, v max Let T be the maximum Doppler of the channel, T be the symbol duration in the time-frequency domain, T = 1 / Δf, and Δf be the subcarrier spacing in the time-frequency domain.

[0185] Optionally, when the cyclic shift includes a cyclic shift along the delay direction and a cyclic shift along the Doppler direction, the acquisition module 1001 is configured to:

[0186] On the l-th antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is then cyclically shifted along the delay direction; or

[0187] On the l-th 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.

[0188] Where l = 1, 2, ..., L.

[0189] Optionally, the delayed Doppler domain in the delayed Doppler information is provided with a first guard interval.

[0190] Optionally, when the location of the first protection interval changes with cyclic shift, the size of the first protection interval satisfies at least one of the following:

[0191] When performing 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, the width in the Doppler domain is greater than or equal to 4k max +1;

[0192] When performing 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, the width in the Doppler domain is greater than or equal to 4 (kmax +p max )+1;

[0193] Among them, l max =τ max MΔf,τ max Let d be the maximum channel delay, Δf be the subcarrier spacing in the time-frequency domain, and d be the maximum channel delay. max =max{d1, d2, ... d L}, k max =v max NT, v max For the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T = 1 / Δf, p max =max{p1, p2, ... p L}

[0194] Optionally, if the position of the first protection interval does not change with cyclic shift, the size of the first protection interval satisfies:

[0195] The width of the delay domain is greater than or equal to 2l max +1, or the width of the delay domain is greater than or equal to (L+1)l. max +L;

[0196] The width of the Doppler domain is greater than or equal to 4k. max +1;

[0197] Among them, l max =τ max MΔf,τ max Let k be the maximum channel delay, Δf be the subcarrier spacing in the time-frequency domain, and k be the frequency-frequency domain. max =v max NT, v max Let T be the maximum Doppler of the channel, and T be the symbol duration in the time-frequency domain, where T = 1 / Δf.

[0198] Optionally, the location of the first protection interval is determined by the protocol or set by the sending end;

[0199] When the location of the first protection interval is set by the transmitting end, the transmitting end sends the location of the first protection interval to the receiving end through target information.

[0200] Optionally, a pilot signal is provided in the first protection interval.

[0201] Optionally, the location of the pilot signal does not change with cyclic shift, or changes with cyclic shift.

[0202] Optionally, the pilot signal can be configured in the following ways: at least one of pulse pilot and sequence pilot.

[0203] Optionally, the pilot information corresponding to the pilot signal is agreed upon by the protocol or set by the transmitting end;

[0204] When the pilot information corresponding to the pilot is set by the transmitting end, the transmitting end sends the pilot information corresponding to the pilot to the receiving end through the target information;

[0205] The pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.

[0206] Optionally, the acquisition module 1001 includes:

[0207] The first acquisition unit is used to multiply the delayed Doppler information with the phase offset corresponding to the antenna on each of the L antennas to obtain the first delayed Doppler information corresponding to each antenna.

[0208] The second acquisition unit is used to cyclically shift the first delayed Doppler information on each of the L antennas to acquire the first information corresponding to each antenna.

[0209] Optionally, the phase offset corresponding to each antenna is agreed upon by the protocol or set by the transmitting end;

[0210] When the phase offset corresponding to each antenna is set by the transmitting end, the transmitting end sends the phase offset corresponding to each antenna to the receiving end through target information.

[0211] Optionally, a second guard interval is set in the Doppler domain of the delayed Doppler information;

[0212] The second protection interval is provided in at least one of the following locations:

[0213] Preset delay domain position;

[0214] Preset Doppler domain location.

[0215] Optionally, the sending module 1002 includes:

[0216] The third acquisition unit is used to transform the first information into the time-frequency domain to obtain the second information;

[0217] The fourth acquisition unit is used to transform the second information to the time domain to obtain the third information;

[0218] The transmitting unit is used to transmit the third information through L antennas respectively.

[0219] Optionally, the second information includes a second protection interval;

[0220] The second protection interval is provided in at least one of the following locations:

[0221] Preset time domain location;

[0222] Preset frequency domain location.

[0223] Optionally, the second protection interval satisfies at least one of the following:

[0224] Configured to all zeros;

[0225] Cyclic prefix;

[0226] Cyclic suffix.

[0227] Optionally, the location of the second protection interval is determined by the protocol or set by the sending end;

[0228] When the location of the second protection interval is set by the transmitting end, the transmitting end sends the location of the second protection interval to the receiving end through target information.

[0229] Optionally, the shift information of the cyclic shift is agreed upon by the protocol or set by the sending end;

[0230] When the shift information is set by the sending end, the sending end sends the shift information to the receiving end through the target information;

[0231] 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.

[0232] Optionally, the target information includes at least one of the following:

[0233] Radio Resource Control (RRC) signaling;

[0234] Layer 1 signaling of the Physical Downlink Control Channel (PDCCH);

[0235] Information carried on the Physical Downlink Shared Channel (PDSCH);

[0236] Signaling of the Media Access Control Layer (MAC) CE control unit;

[0237] System Information Block (SIB);

[0238] Layer 1 signaling of the Physical Uplink Control Channel (PUCCH);

[0239] Message MSG 1 of the Physical Random Access Channel (PRACH);

[0240] PRACH message 2 MSG 2;

[0241] PRACH's message 3 MSG 3;

[0242] PRACH message 4 MSG 4;

[0243] PRACH message A MSG A;

[0244] PRACH message B MSG B;

[0245] Information carried on the Physical Uplink Shared Channel (PUSCH);

[0246] Xn interface signaling;

[0247] PC5 interface signaling;

[0248] Straight-through link interface signaling.

[0249] It should be noted that this device embodiment corresponds to the above method embodiment. All implementation processes and methods of the above method embodiment can be applied to this device embodiment and can achieve the same technical effect.

[0250] The information transmission device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0251] This application embodiment also provides a transmitting end, including a processor and a communication interface. The processor is used to cyclically shift delayed Doppler information on L antennas respectively to obtain first information corresponding to each antenna; the communication interface is used to transmit the first information through L antennas respectively.

[0252] Where L is an integer greater than or equal to 1.

[0253] This transmitting end embodiment corresponds to the aforementioned transmitting end-side method embodiment. All implementation processes and methods of the aforementioned method embodiments can be applied to this transmitting end embodiment and achieve the same technical effect. Specifically, Figure 11 A schematic diagram of a hardware structure for implementing the transmitting end in this application embodiment.

[0254] The transmitter 1100 includes an antenna 1101, a radio frequency (RF) device 1102, and a baseband device 1103. The antenna 1101 is connected to the RF device 1102. In the uplink direction, the RF device 1102 receives information through the antenna 1101 and transmits the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be transmitted and sends it to the RF device 1102. The RF device 1102 processes the received information and transmits it through the antenna 1101.

[0255] The aforementioned frequency band processing device can be located in the baseband device 1103. The method executed by the first network-side device in the above embodiments can be implemented in the baseband device 1103, which includes a processor 1104 and a memory 1105.

[0256] The baseband device 1103 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 11 As shown, one of the chips is, for example, a processor 1104, which is connected to a memory 1105 to call the program in the memory 1105 and execute the information transmission method shown in the above method embodiment.

[0257] 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 (CPRI).

[0258] Specifically, the transmitting end in this embodiment of the invention further includes: instructions or programs stored in memory 1105 and executable on processor 1104, wherein processor 1104 calls the instructions or programs in memory 1105 to execute. Figure 10 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0259] Preferably, this application embodiment also provides a transmitting end, including a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, they implement various processes applied to the information transmission method embodiment on the transmitting end side and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0260] This application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, it implements various processes of the information transmission method embodiment applied to the sending end side and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0261] The computer-readable storage medium mentioned above includes, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0262] Specifically, Figure 12 This is a schematic diagram of another hardware structure for implementing the transmitting end in this application embodiment.

[0263] The transmitter 1200 includes, but is not limited to, at least some of the following components: radio frequency unit 1201, network module 1202, audio output unit 1203, input unit 1204, sensor 1205, display unit 1206, user input unit 1207, interface unit 1208, memory 1209, and processor 1210.

[0264] Those skilled in the art will understand that the terminal 1200 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1210 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 12 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0265] It should be understood that, in this embodiment, the input unit 1204 may include a graphics processing unit (GPU) 12041 and a microphone 12042. The GPU 12041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1206 may include a display panel 12061, which 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. The touch panel 12071 is also called a touch screen. The touch panel 12071 may include 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 buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0266] In this embodiment, the radio frequency unit 1201 receives downlink data from the network-side device and processes it for the processor 1210; additionally, it sends uplink data to the network-side device. 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, etc.

[0267] The memory 1209 can be used to store software programs or instructions and various data. The memory 1209 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1209 may include high-speed random access memory and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0268] Processor 1210 may include one or more processing units; optionally, processor 1210 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1210.

[0269] The processor 1210 is used to implement:

[0270] The delayed Doppler information is cyclically shifted on each of the L antennas to obtain the first information corresponding to each antenna;

[0271] The radio frequency unit 1201 is used to transmit the first information through L antennas respectively;

[0272] Where L is an integer greater than or equal to 1.

[0273] Optionally, the cyclic shift includes at least one of the following:

[0274] Cyclic shift along the delay direction;

[0275] Cyclic shift along the Doppler direction.

[0276] Optionally, when the cyclic shift includes a cyclic shift along the delay direction, the processor 1210 is configured to implement:

[0277] On the l-th antenna, the last d-th segment of the delayed Doppler information along the delay direction is... l The d position is placed at the head. l In position, the remaining Md l The position is shifted sequentially backward by d. lPosition; or

[0278] On the l-th antenna, the delayed Doppler information is forwarded along the delay direction by the first d... l The d position is located at the tail. l In position, the remaining Md l The position moves forward by d in sequence. l Bit;

[0279] Where, d l d represents the number of shifts along the delay direction on the l-th antenna. l Greater than or equal to 1, M is the total number of indices of delayed Doppler information in the delay direction, l = 1, 2, ..., L.

[0280] Optionally, d l The method for determining it is as follows:

[0281] According to the formula: d l =(l-1)l max Sure;

[0282] Among them, l max =τ max MΔf,τ max Δf represents the maximum delay of the channel, and Δf represents the subcarrier spacing in the time-frequency domain.

[0283] Optionally, when the cyclic shift includes a cyclic shift along the Doppler direction, the processor 1210 is configured to implement:

[0284] On the l-th antenna, the last p-th delay of the Doppler information along the Doppler direction is... l The p is placed at the head. l In the remaining Np positions l The position is shifted sequentially backward by p. l Position; or

[0285] On the l-th antenna, the delayed Doppler information is forwarded along the Doppler direction for the first p... l p is placed at the tail l In the remaining Np positions l The position moves forward by p in sequence. l Bit;

[0286] Where, p l p represents the number of shifts along the Doppler direction on the l-th antenna. l Greater than or equal to 1, N is the total number of indices of delayed Doppler information in the Doppler direction, l = 1, 2, ..., L.

[0287] Optionally, p l The method for determining it is as follows:

[0288] According to the formula: pl =(l-1)k max Sure;

[0289] Where, k max =v max NT, v max Let T be the maximum Doppler of the channel, T be the symbol duration in the time-frequency domain, T = 1 / Δf, and Δf be the subcarrier spacing in the time-frequency domain.

[0290] Optionally, when the cyclic shift includes a cyclic shift along the delay direction and a cyclic shift along the Doppler direction, the processor 1210 is configured to implement:

[0291] On the l-th antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is then cyclically shifted along the delay direction; or

[0292] On the l-th 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.

[0293] Where l = 1, 2, ..., L.

[0294] Optionally, the delayed Doppler domain in the delayed Doppler information is provided with a first guard interval.

[0295] Optionally, when the location of the first protection interval changes with cyclic shift, the size of the first protection interval satisfies at least one of the following:

[0296] When performing 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, the width in the Doppler domain is greater than or equal to 4k max +1;

[0297] When performing 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, the width in the Doppler domain is greater than or equal to 4 (k max +p max )+1;

[0298] Among them, l max =τ max MΔf,τ max Let d be the maximum channel delay, Δf be the subcarrier spacing in the time-frequency domain, and d be the maximum channel delay. max =max{d1, d2, ... d L}, k max =v maxNT, v max For the maximum Doppler of the channel, T is the symbol duration in the time-frequency domain, T = 1 / Δf, p max =max{p1, p2, ... p L}

[0299] Optionally, if the position of the first protection interval does not change with cyclic shift, the size of the first protection interval satisfies:

[0300] The width of the delay domain is greater than or equal to 2l max +1; or the width of the delay domain is greater than or equal to (L+1)l. max +L;

[0301] The width of the Doppler domain is greater than or equal to 4k. max +1;

[0302] Among them, l max =τ max MΔf,τ max Let k be the maximum channel delay, Δf be the subcarrier spacing in the time-frequency domain, and k be the frequency-frequency domain. max =v max NT, v max Let T be the maximum Doppler of the channel, and T be the symbol duration in the time-frequency domain, where T = 1 / Δf.

[0303] Optionally, the location of the first protection interval is determined by the protocol or set by the sending end;

[0304] When the location of the first protection interval is set by the transmitting end, the transmitting end sends the location of the first protection interval to the receiving end through target information.

[0305] Optionally, a pilot signal is provided in the first protection interval.

[0306] Optionally, the location of the pilot signal does not change with cyclic shift, or changes with cyclic shift.

[0307] Optionally, the pilot signal can be configured in the following ways: at least one of pulse pilot and sequence pilot.

[0308] Optionally, the pilot information corresponding to the pilot signal is agreed upon by the protocol or set by the transmitting end;

[0309] When the pilot information corresponding to the pilot is set by the transmitting end, the transmitting end sends the pilot information corresponding to the pilot to the receiving end through the target information;

[0310] The pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.

[0311] Alternatively, processor 1210 is used to implement:

[0312] The transmitting end multiplies the delayed Doppler information with the phase offset corresponding to each of the L antennas to obtain the first delayed Doppler information for each antenna.

[0313] The transmitting end performs cyclic shifting of the first delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna.

[0314] Optionally, the phase offset corresponding to each antenna is agreed upon by the protocol or set by the transmitting end;

[0315] When the phase offset corresponding to each antenna is set by the transmitting end, the transmitting end sends the phase offset corresponding to each antenna to the receiving end through target information.

[0316] Optionally, a second guard interval is set in the Doppler domain of the delayed Doppler information;

[0317] The second protection interval is provided in at least one of the following locations:

[0318] Preset delay domain position;

[0319] Preset Doppler domain location.

[0320] Alternatively, processor 1210 is used to implement:

[0321] The first information is transformed into the time-frequency domain to obtain the second information;

[0322] The second information is transformed to the time domain to obtain the third information;

[0323] The radio frequency unit 1201 is used to transmit the third information through L antennas respectively.

[0324] Optionally, the second information includes a second protection interval;

[0325] The second protection interval is provided in at least one of the following locations:

[0326] Preset time domain location;

[0327] Preset frequency domain location.

[0328] Optionally, the second protection interval satisfies at least one of the following:

[0329] Configured to all zeros;

[0330] Cyclic prefix;

[0331] Cyclic suffix.

[0332] Optionally, the location of the second protection interval is determined by the protocol or set by the sending end;

[0333] When the location of the second protection interval is set by the transmitting end, the transmitting end sends the location of the second protection interval to the receiving end through target information.

[0334] Optionally, the shift information of the cyclic shift is agreed upon by the protocol or set by the sending end;

[0335] When the shift information is set by the sending end, the sending end sends the shift information to the receiving end through the target information;

[0336] 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.

[0337] Optionally, the target information includes at least one of the following:

[0338] Radio Resource Control (RRC) signaling;

[0339] Layer 1 signaling of the Physical Downlink Control Channel (PDCCH);

[0340] Information carried on the Physical Downlink Shared Channel (PDSCH);

[0341] Signaling of the Media Access Control Layer (MAC) CE control unit;

[0342] System Information Block (SIB);

[0343] Layer 1 signaling of the Physical Uplink Control Channel (PUCCH);

[0344] Message MSG 1 of the Physical Random Access Channel (PRACH);

[0345] PRACH message 2 MSG 2;

[0346] PRACH's message 3 MSG 3;

[0347] PRACH message 4 MSG 4;

[0348] PRACH message A MSG A;

[0349] PRACH message B MSG B;

[0350] Information carried on the Physical Uplink Shared Channel (PUSCH);

[0351] Xn interface signaling;

[0352] PC5 interface signaling;

[0353] Straight-through link interface signaling.

[0354] Optional, such as Figure 13 As shown, this application embodiment also provides a communication device 1300, including a processor 1301, a memory 1302, and a program or instruction stored in the memory 1302 that can be executed on the processor 1301. For example, when the communication device 1300 is a transmitting end, when the program or instruction is executed by the processor 1301, it implements the various processes of the above-described information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0355] The terminal involved in the embodiments of this application can be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The name of the terminal device may differ in different systems; for example, in a 5G system, the terminal device can be called a User Equipment (UE). The wireless terminal device can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device. These exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0356] The network-side equipment involved in the embodiments of this application can be a base station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB or eNodeB) in LTE, a relay station or access point, or a base station in a future 5G network, etc., and is not limited thereto.

[0357] Network-side devices and terminals can each use one or more antennas for Multiple-Input Multiple-Output (MIMO) transmission. MIMO transmission can be Single-User MIMO (SU-MIMO) or Multiple-User MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, pre-coding transmission, or beamforming transmission, etc.

[0358] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described information transmission method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0359] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0360] This application also provides a computer program / program product, which is stored in a non-transient storage medium and executed by at least one processor to implement the various processes of the above-described information transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0361] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0362] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0363] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An information transmission method, characterized in that, include: The transmitting end performs cyclic shifting of the delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna; The transmitting end transmits the first information through the L antennas respectively; Where L is an integer greater than or equal to 2; The cyclic shift includes: Cyclic shift along the Doppler direction; The transmitting end performs cyclic shifting of the delayed Doppler information on each of the L antennas, including: In the On the root antenna, the delayed Doppler information along the Doppler direction will be the last... Position placed at the head In the remaining N- positions The positions move sequentially backward. Position; or In the On the root antenna, the delayed Doppler information will be forward along the Doppler direction. Positioned at the tail In the remaining N- positions The positions move forward sequentially. Bit; in, For the first The number of shifts along the Doppler direction on the root antenna. Greater than or equal to 1, where N is the total number of indices of delayed Doppler information in the Doppler direction. =1, 2, ..., L.

2. The method according to claim 1, characterized in that, The cyclic shift also includes: Cyclic shift along the delay direction.

3. The method according to claim 2, characterized in that, When the cyclic shift includes cyclic shift along the delay direction, the transmitting end performs cyclic shift of the delayed Doppler information on each of the L antennas, including: In the On the root antenna, the delayed Doppler information is transmitted along the delay direction. Position placed at the head In position, the remaining M- The positions move sequentially backward. Position; or In the On the root antenna, the delayed Doppler information is forward along the delay direction. Positioned at the tail In position, the remaining M- The positions move forward sequentially. Bit; in, For the first The number of shifts along the delay direction on the root antenna. Greater than or equal to 1, where M is the total number of indices of delayed Doppler information in the delay direction. =1, 2, ..., L.

4. The method according to claim 3, characterized in that, The method for determining it is as follows: According to the formula: Sure; in, , The maximum delay of the channel. The subcarrier spacing is in the time-frequency domain.

5. The method according to claim 1, characterized in that, The method for determining it is as follows: According to the formula: Sure; in, , The maximum Doppler of the channel is T, where T is the symbol duration in the time-frequency domain, and T = 1 / , The subcarrier spacing is in the time-frequency domain.

6. The method according to any one of claims 2-4, characterized in that, When the cyclic shift includes both cyclic shift along the delay direction and cyclic shift along the Doppler direction, the transmitting end performs cyclic shifting of the delayed Doppler information on the L antennas respectively, including: In the On the antenna, the delayed Doppler information is cyclically shifted along the Doppler direction, and the cyclically shifted delayed Doppler information is then cyclically shifted along the delay direction; or In the On the antenna, the delayed Doppler information is cyclically shifted along the delay direction, and the cyclically shifted delayed Doppler information is then cyclically shifted along the Doppler direction. in, =1, 2, ..., L.

7. The method according to claim 3, characterized in that, The delayed Doppler field in the delayed Doppler information is provided with a first guard interval.

8. The method according to claim 7, characterized in that, When the position of the first protection interval changes with cyclic shift, the size of the first protection interval satisfies at least one of the following: When performing cyclic shifting along the delay direction, the width of the first guard interval in the delay domain is greater than or equal to The width in the Doppler domain is greater than or equal to ; When performing cyclic shifting along the Doppler direction, the width of the first guard interval in the delay domain is greater than or equal to The width in the Doppler domain is greater than or equal to ; in, , The maximum delay of the channel. The subcarrier spacing in the time-frequency domain. , , The maximum Doppler of the channel is T, where T is the symbol duration in the time-frequency domain, and T = 1 / , .

9. The method according to claim 8, characterized in that, If the position of the first protection interval does not change with cyclic shift, the size of the first protection interval satisfies: The width of the delay domain is greater than or equal to Or, the width of the delay domain is greater than or equal to ; The width of the Doppler domain is greater than or equal to in, , The maximum delay of the channel. The subcarrier spacing in the time-frequency domain. , The maximum Doppler of the channel is T, where T is the symbol duration in the time-frequency domain, and T = 1 / .

10. The method according to claim 8, characterized in that, The location of the first protection interval is determined by the protocol or set by the sending end; When the location of the first protection interval is set by the transmitting end, the transmitting end sends the location of the first protection interval to the receiving end through target information.

11. The method according to claim 8, characterized in that, A pilot signal is provided in the first protection interval.

12. The method according to claim 11, characterized in that, The location of the pilot signal does not change with cyclic shift, or changes with cyclic shift.

13. The method according to claim 11, characterized in that, The pilot settings include at least one of pulse pilot and sequence pilot.

14. The method according to any one of claims 11-13, characterized in that, The pilot information corresponding to the pilot signal is determined by the protocol or set by the transmitting end; When the pilot information corresponding to the pilot is set by the transmitting end, the transmitting end sends the pilot information corresponding to the pilot to the receiving end through the target information; The pilot information corresponding to the pilot includes at least one of the following: location, setting method, and pilot value.

15. The method according to claim 1, characterized in that, The transmitting end performs cyclic shifting of the delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna, including: The transmitting end multiplies the delayed Doppler information with the phase offset corresponding to each of the L antennas to obtain the first delayed Doppler information for each antenna. The transmitting end performs cyclic shifting of the first delayed Doppler information on each of the L antennas to obtain the first information corresponding to each antenna.

16. The method according to claim 15, characterized in that, The phase offset corresponding to each antenna is determined by the protocol or set by the transmitting end; When the phase offset corresponding to each antenna is set by the transmitting end, the transmitting end sends the phase offset corresponding to each antenna to the receiving end through target information.

17. The method according to claim 1, characterized in that, A second protection interval is set in the Doppler domain of the delayed Doppler information; The second protection interval is provided in at least one of the following locations: Preset delay domain position; Preset Doppler domain location.

18. The method according to claim 1, characterized in that, The transmitting end transmits the first information through the L antennas respectively, including: The transmitting end transforms the first information into the time-frequency domain to obtain the second information; The transmitting end transforms the second information into the time domain to obtain the third information; The transmitting end transmits the third information through the L antennas respectively.

19. The method according to claim 18, characterized in that, The second information includes a second protection interval; The second protection interval is provided in at least one of the following locations: Preset time domain location; Preset frequency domain location.

20. The method according to claim 17 or 19, characterized in that, The second protection interval satisfies at least one of the following: Configured to all zeros; Cyclic prefix; Cyclic suffix.

21. The method according to claim 17 or 19, characterized in that, The location of the second protection interval is determined by the protocol or set by the sending end; When the location of the second protection interval is set by the transmitting end, the transmitting end sends the location of the second protection interval to the receiving end through target information.

22. The method according to claim 2, characterized in that, The shift information for the cyclic shift is agreed upon by the protocol or set by the sending end; When the shift information is set by the sending end, the sending end sends the shift information to the receiving end through the target information; 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.

23. The method according to claim 10, 16 or 22, characterized in that, 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 (MAC) CE control unit; System Information Block (SIB); Layer 1 signaling of the Physical Uplink Control Channel (PUCCH); Message MSG 1 of the Physical Random Access Channel (PRACH); PRACH message 2 MSG 2; PRACH's message 3 MSG 3; PRACH message 4 MSG 4; PRACH message A MSG A; PRACH message B MSG B; Information carried on the Physical Uplink Shared Channel (PUSCH); Xn interface signaling; PC5 interface signaling; Straight-through link interface signaling.

24. An information transmission device, applied at a transmitting end, characterized in that, include: The acquisition module is used to cyclically shift the delayed Doppler information on each of the L antennas to acquire the first information corresponding to each antenna. A transmitting module is used to transmit the first information through L antennas respectively; Where L is an integer greater than or equal to 2; The cyclic shift includes: Cyclic shift along the Doppler direction; The acquisition module is used for: In the On the root antenna, the delayed Doppler information along the Doppler direction will be the last... Position placed at the head In the remaining N- positions The positions move sequentially backward. Position; or In the On the root antenna, the delayed Doppler information will be forward along the Doppler direction. Positioned at the tail In the remaining N- positions The positions move forward sequentially. Bit; in, For the first The number of shifts along the Doppler direction on the root antenna. Greater than or equal to 1, where N is the total number of indices of delayed Doppler information in the Doppler direction. =1, 2, ..., L.

25. The apparatus according to claim 24, characterized in that, The cyclic shift also includes: Cyclic shift along the delay direction.

26. A transmitter, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the information transmission method as described in any one of claims 1 to 23.

27. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the information transmission method as described in any one of claims 1 to 23.

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