Delayed Doppler Domain Channel Information Feedback Method, Apparatus, and Electronic Device

Abstract

The present application discloses a method, device and electronic device for feedback of delayed Doppler domain channel information, which belong to the field of mobile communication. A method for feedback of delayed Doppler domain channel information according to an embodiment of the present application includes a step of a first device transmitting target feedback information to a second device, where the target feedback information is associated with target channel information, the target channel information is all or part of channel information of a delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second device or a third device.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This invention claims priority to a Chinese patent application filed with the China Patent Office on May 21, 2021, bearing application number 202110560591.8 and entitled "Method, device and electronic device for feedback of delayed Doppler domain channel information," the entire contents of which are incorporated herein by reference.

[0002] The present application belongs to the technical field of mobile communications, and particularly relates to a method, apparatus and electronic device for feedback of delayed Doppler domain channel information. [Background technology]

[0003] In a communication system, in order to perform intentional channel preprocessing at the transmitting side, such as precoding, link adaptation, and scheduling, it is necessary to obtain channel estimation from the transmitting side (side A) to the receiving side (side B). If the channel has reciprocity, for example, in the case of a time division duplex (TDD) channel, a reference signal can be transmitted from side B, and side A can estimate the channel from side B to side A, and channel estimation from side A to side B can be obtained due to channel reciprocity. If the channel does not have reciprocity, for example, in the case of a frequency division duplex (FDD) channel, it is necessary to transmit a reference signal from side A, and side B can estimate the channel from side A to side B, and then feed it back to side A. The latter feedback-based scheme is equally suitable for reciprocal channels. Different modulation techniques can be used to estimate the channel to obtain different channel information, which may be time-frequency domain channel information based on Orthogonal Frequency Division Multiplex (OFDM) modulation, or delay-Doppler domain channel information based on Orthogonal Time Frequency Space (OTFS) modulation to indicate the delay and Doppler characteristics of the channel.

[0004] In current transmission methods, the channel information feedback is always directed to the time-frequency domain channel of OFDM modulation, and the delay-Doppler domain channel information has its own characteristics. The signal channel pass-through method in OTFS and the input / output relationship between the transmitter and receiver are also different from the channel pass-through method of the time-frequency domain signal. Therefore, when feedbacking the delay-Doppler domain channel information, it is difficult to balance the feedback overhead and feedback accuracy. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a method, device and electronic device for feedback of delay Doppler domain channel information, which can solve the problem of imbalance between feedback overhead and feedback accuracy when feedbacking delay Doppler domain channel information. [Means for solving the problem]

[0006] In a first aspect, a method for feedback of delayed Doppler domain channel information applied to a first device, comprising: a first device transmitting target feedback information to a second device; The method provides the above, wherein the target feedback information is associated with target channel information, the target channel information being all or part of channel information in a delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second device or a third device.

[0007] In a second aspect, a measurement module for performing channel estimation on the target signal to obtain target channel information in the delay Doppler domain; a feedback module for transmitting target feedback information to the second device; The apparatus provides a delayed Doppler domain channel information feedback, wherein the target feedback information is associated with the target channel information, and the target signal is a signal transmitted by the second or third device to the first device.

[0008] In a third aspect, there is provided a terminal including a processor, a memory, and a program or command stored in the memory and executable on the processor, wherein when the program or command is executed by the processor, the steps of the method according to the first aspect are realized.

[0009] In a fourth aspect, there is provided a network side device including a processor, a memory, and a program or command stored in the memory and executable on the processor, wherein when the program or command is executed by the processor, the steps of the method described in the first aspect are realized.

[0010] In a fifth aspect, there is provided a readable storage medium having stored thereon a program or commands which, when executed by a processor, implement the steps of the method according to the first aspect.

[0011] In a sixth aspect, there is provided a chip including a processor and a communication interface, the communication interface and the processor being coupled together, the processor executing a program or command to implement the method of the first aspect.

[0012] In a seventh aspect, there is provided a computer program / program product stored on a non-transitory storage medium and executed by at least one processor to implement the steps of the delayed Doppler domain channel information feedback method described in the first aspect. [Effects of the Invention]

[0013] In an embodiment of the present application, target feedback information is sent to a second device, where the target feedback information is associated with the target channel information, and the target channel information is all or part of channel information in the delay Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal sent to the first device by the second device or a third device, thereby accurately sending channel information in the delay Doppler domain, and balancing feedback overhead and feedback accuracy through methods for determining the target channel information and the target feedback information. [Brief explanation of the drawings]

[0014] [Figure 1]1 shows a structural schematic diagram of a wireless communication system to which the embodiments of the present application can be applied; [Figure 2] 2 illustrates a flowchart of a delayed Doppler domain channel information feedback method according to an embodiment of the present application; [Figure 3] 1 illustrates a channel information schematic diagram of a delay Doppler domain according to an embodiment of the present application; [Figure 4] 4 illustrates a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application; [Figure 5] 4 illustrates a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application; [Figure 6] 4 illustrates a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application; [Figure 7] 4 illustrates a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application; [Figure 8] 1 is a structural schematic diagram of a delay Doppler domain channel information feedback device according to an embodiment of the present application; [Figure 9] 1 shows a structural schematic diagram of a communication device provided in an embodiment of the present application. [Figure 10] FIG. 1 is a structural schematic diagram of a terminal implementing an embodiment of the present application; [Figure 11] FIG. 2 is a structural schematic diagram of a network-side device that implements an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, the technical solutions in the embodiments of the present application will be clearly explained with reference to the drawings in the embodiments of the present application, and it should be understood that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments in the present application are all within the scope of protection of the present application.

[0016] The terms "first," "second," etc. in the specification and claims of this application are not intended to describe a particular order or chronology, but rather to distinguish between similar objects. It should be understood that terms used in this manner may be interchanged where appropriate so that the embodiments of this application can be implemented in an order other than that illustrated or described herein. It should also be understood that the objects distinguished by "first," "second," etc. are generally of one type and do not limit the number of objects; for example, the first object may be one or multiple. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the symbol " / " generally indicates that the related objects before and after are in an "or" relationship.

[0017] It should be noted that the techniques described in the embodiments of this 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 this application are often used interchangeably, and the techniques described may be used in other systems and wireless technologies in addition to those mentioned above. While the following description will discuss New Radio (NR) systems for illustrative purposes, and NR terminology is used in much of the following description, these technologies may also be used in other systems and wireless technologies, such as 6th Generation (6G) networks. thIt can also be applied to applications other than NR system applications, such as 6G (Generation 6G) communication systems.

[0018] FIG. 1 shows a structural schematic diagram of a wireless communication system to which the embodiments of the present application can be applied. The wireless communication system includes a first device 11 and a second device 12, where the first device and the second device may be two terminals, or a terminal and a network side device. The terminal may be called a terminal device or user equipment (UE), and the terminal may be a terminal side device such as a mobile phone, a tablet personal computer (PDA), a laptop computer (also called a notebook computer), a personal digital assistant (PDA), a personal digital assistant, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), a wearable device (Waitable Device), a vehicle-mounted equipment (VUE), a pedestrian-mounted equipment (PUE), etc. Wearable devices include smart watches, wristbands, earphones, glasses, etc. It should be noted that the embodiments of the present application are not limited to a specific type of terminal. The network side device may be a base station or a core network, where the base station is aThe base station may also be referred to as 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 B node, an evolved B node (eNB), a home B node, a home evolved B node, a wireless local area network (WLAN) access point, a WiFi node, a transmission reception point (TRP), or any other appropriate term in the field, and is not limited to a specific technical term as long as the same technical effect can be achieved. It should be noted that although the embodiments of this application only take base stations in an NR system as examples, the specific type of base station is not limited.

[0019] The delayed Doppler domain channel information feedback method provided in the embodiments of the present application will be described in detail below with reference to the drawings according to several embodiments and application scenarios thereof.

[0020] 2 shows a flowchart of a method for feedback of delayed Doppler domain channel information according to an embodiment of the present application, and as shown in FIG. 2, the method is performed by a first device, which may be a terminal or a network side device. In other words, the method can be performed by software or hardware installed in the terminal or the network side device. The method may include the following step S201:

[0021] In step S201, the first device transmits target feedback information to the second device. Here, the target feedback information is associated with target channel information, and the target channel information is all or part of channel information in the delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second or third device.

[0022] The first device can obtain channel information in the delay Doppler domain between the first device and the second device by executing a predetermined channel estimation algorithm. Specifically, the channel information can be obtained by performing delay Doppler analysis on a target signal transmitted from the second device or the third device. The target signal can include a reference signal or a synchronization signal, and the reference signal can be specifically a Cell Reference Signal (CRS); A channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS); Position Reference Signal (PRS), a phase-tracking reference signal (PTRS); and a Tracking Reference Signal (TRS).

[0023] There are various methods for channel estimation for the target signal, and channel estimation based on OTFS modulation may be used.

[0024] The delay-Doppler domain channel information obtained by the first device through channel estimation may be mapped onto a two-dimensional delay-Doppler plane, as shown in Figure 3. A range of delay and Doppler values ​​can be determined based on the transmission frequency between the first and second devices, the maximum relative speed between the first and second devices, and the maximum distance between the first and second devices. The boundaries of the delay-Doppler domain are then determined based on the range of delay and Doppler values. The delay-Doppler domain can then be displayed on a two-dimensional delay-Doppler grid, where each grid represents a delay-Doppler pair and the complex gain on the grid represents the complex gain on the transmission path corresponding to the delay-Doppler pair. The delay-Doppler domain resolution is φ seconds, i.e., each grid in the delay domain represents φ seconds, and the Doppler domain resolution is ω Hertz, i.e., each grid in the Doppler domain represents ω Hertz. One

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[0025] The first device extracts target channel information to be transmitted to the second device by analyzing the delay Doppler domain channel information and transmits the target channel information to the second device in the form of target feedback information. The second device analyzes the target channel information by analyzing the target feedback information.

[0026] Therefore, an embodiment of the present application provides a method for feedback of delayed Doppler domain channel information, and transmits target feedback information to a second device, where the target feedback information is associated with target channel information, and the target channel information is all or part of the delayed Doppler domain channel information obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second or third device, thereby accurately transmitting the delayed Doppler domain channel information, and balancing feedback overhead and feedback accuracy through methods for determining the target channel information and the target feedback information.

[0027] 4 shows a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application, as shown in FIG. 4, the method is performed by a first device, which may be a terminal or a network side device, in other words, the method can be performed by software or hardware installed in the terminal or the network side device, and may include the following steps S401 and S402:

[0028] In step S401, a first device obtains target channel information, the target channel information including all delay-Doppler pairs in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair, where the delay-Doppler pair is determined by a pair of delay values ​​and Doppler values, and is for indicating a region indicated by the pair of delay values ​​and Doppler values ​​in the delay-Doppler domain.

[0029] In the embodiment of the present application, the delay Doppler domain channel information obtained by the first device through channel estimation is the target channel information. Taking the delay Doppler domain channel information shown in FIG. 3 as an example, the first device

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[0030] In step S402, the first device transmits target feedback information to the second device. Here, the target feedback information is associated with target channel information, and the target channel information is all or part of channel information in the delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second or third device.

[0031] Before step S402, there are various feedback methods for the first device to determine the target feedback information to be sent to the second device based on the target channel information; A method of directly quantifying the target channel information as target feedback information; and determining target feedback information based on a target codebook selected from a codebook set according to the target channel information.

[0032] In one embodiment, directly quantifying channel information corresponding to each delay Doppler in the target channel information as target feedback information comprises directly quantifying position information of each delay-Doppler pair in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair as target feedback information, and transmitting the target feedback information to a second device, which restores the channel information in the delay-Doppler domain based on the received target feedback information obtained by direct quantification.

[0033] From these facts, the feedback method based on direct quantification can provide the most complete feedback of the channel information, allowing the second device to recover the channel information with high feedback accuracy, but this feedback method requires high feedback overhead.

[0034] In one embodiment, the floating-point precision of the complex gains corresponding to the delay-Doppler pairs in the target feedback information is determined by a second parameter, the second parameter being: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0035] In another embodiment, the target feedback information is determined based on a target codebook selected from a codebook set according to channel information in a delay Doppler domain, the codebook set may be preset and may include multiple codebooks, and the first device selects a target codebook from the codebook set according to the acquired target channel information in a delay Doppler domain.

[0036] In one embodiment, the first device may select a codebook from a codebook set that is most similar to the target channel information, and determine target feedback information based on the most similar codebook. The target feedback information may be an index of the most similar codebook, and the first device may transmit the index of the most similar codebook to the second device. The second device may search for a corresponding codebook from the codebook set according to the received index, and restore the target channel information based on the searched codebook. The searched codebook may then be used as target channel information and the channel information in the delay Doppler domain.

[0037] In another embodiment, when the target channel information is represented by a weighted sum of multiple codebooks in the codebook set, target feedback information is determined based on the weighted sum of the multiple codebooks. A first device selects multiple codebooks from a codebook set and represents the target channel information as a weighted sum of the multiple codebooks. In one embodiment, the first device determines target feedback information based on the weighted sum of the multiple codebooks, including an identifier and a corresponding weight of each codebook, and transmits the identifiers of the multiple codebooks and the corresponding weights to the second device. The second device finds corresponding multiple codebooks from the codebook set based on the received identifiers, and recovers the target channel information based on the weights of each codebook, and further obtains the channel information in the delay Doppler domain.

[0038] In one embodiment, the floating point precision of the weight values ​​is determined by a fourth parameter, the fourth parameter being: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0039] In one embodiment, the first signaling exchanged between the first device and the second device comprises: Radio Resource Control (RRC) signaling; Layer 1 signaling of the physical downlink control channel (PDCCH); and Physical downlink shared channel (PDSCH) information; Medium Access Control Layer Control Element (MAC CE) signaling; System Information Block (SIB), Layer 1 signaling of the physical uplink control channel (PUCCH); Physical Random Access Channel (PRACH) MSG 1 information; MSG 3 information of the physical random access channel; MSG A information of the physical random access channel; information on the physical uplink shared channel; Xn interface signaling; PC5 interface signaling and and sidelink interface signaling.

[0040] In one embodiment, the first device may adaptively adjust the first parameter and / or the fourth parameter according to transmission environment conditions and transmission requirements, which can be specifically achieved by transmitting first signaling, and the adaptive adjustment process is triggered by the first device or the second device.

[0041] In one embodiment, FIG. 5 shows a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application, and as shown in FIG. 5, the method includes the following steps S501 to S509.

[0042] In step S501, a first device obtains channel information in the delay Doppler domain. In step S502, it is determined whether to directly quantify the channel information in the delayed Doppler domain; if yes, execute step S503; if no, execute step S505 based on the codebook set. In step S503, all the channel information in the delay Doppler domain is directly quantified as the target feedback information. In step S504, the target feedback information is sent to the second device. In step S505, it is determined whether or not a method using only the codebook is to be adopted. If yes, step S506 is executed, and if no, step S508 is executed. In step S506, a codebook that is most similar to the target channel information is selected from the codebook set. In step S507, based on the most similar codebook, feed back the identifier of the codebook to the second device. In step S508, the target channel information is represented by a weighted sum of a plurality of codebooks in the codebook set. In step S509, the identifiers of the plurality of codebooks and the corresponding weights are fed back to the second device.

[0043] Therefore, the embodiments of the present application provide a method for feedback of delay Doppler domain channel information, in which the delay Doppler domain channel information obtained by estimation by the first device is both target channel information, and the target feedback information is obtained by direct quantification or based on a codebook set and transmitted to the second device, thereby accurately transmitting the delay Doppler domain channel information. The method for determining the target channel information and the target feedback information can balance feedback overhead and feedback accuracy.

[0044] 6 shows a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application, as shown in FIG. 6, the method is performed by a first device, which may be a terminal or a network side device, in other words, the method can be performed by software or hardware installed in the terminal or the network side device, and may include the following steps S601 and S602:

[0045] In step S601, obtain the norm of the complex gain corresponding to each delay-Doppler pair in the delay-Doppler domain, and determine target channel information based on the delay-Doppler pairs that satisfy a first condition. Here, the delay-Doppler pair that satisfies the first condition is delay-Doppler pairs whose norm is greater than a threshold α; a first number F of delay-Doppler pairs with the largest norm;

[0046] There are various ways to calculate the norm of the complex gain, and in one embodiment, the norm is the modulus value of the complex gain or a target power of the modulus value of the complex gain.

[0047] In one embodiment, the floating-point precision of the norm is determined by a third parameter, the third parameter being: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0048] In the embodiment of the present application, the first device obtains the channel information in the delay Doppler domain through channel estimation, and then selects a part of it to feed back.

[0049] In one embodiment, the first device selects delay-Doppler pairs whose norm is greater than a threshold α based on the norm of the complex gain of each delay-Doppler pair. For example, taking the delay-Doppler domain shown in FIG. 3 as an example, the norm of the complex gain of each delay-Doppler pair is obtained. The magnitude of the norm may be indicated by the density of each grid point in FIG. 3, where the higher the density, the larger the norm. Specifically, when α=0.7, the delay- The coordinates of the Doppler pairs are [-2,4], [0,7], and [3,2], and the norms of the corresponding complex gains are 0.7262, 0.9084, and 0.7838, respectively. The coordinates of the delay-Doppler pairs selected for α=0.4 are [-2,4], [0,7], [3,2], [-1,3], and [3,6], and the norms of the corresponding complex gains are 0.7262, 0.9084, 0.7838, 0.4132, and 0.5209, respectively.

[0050] It should be understood that the threshold α can be adjusted to balance feedback overhead and feedback accuracy, and that in the same transmission environment and feedback mechanism, the larger α is, the smaller the feedback overhead and the lower the feedback accuracy.

[0051] In another embodiment, the first device selects the top F delay-Doppler pairs with the largest norm based on the norm of the complex gain of each delay-Doppler pair. For example, taking the delay-Doppler domain shown in FIG. 3 as an example, when F=4, the coordinates of the selected delay-Doppler pairs are [0,7], [3,2], [-2,4], and [3,6], and the corresponding complexThe gain norms are 0.9084, 0.7838, 0.7262, and 0.5209, respectively. When F=7, the coordinates of the selected delay-Doppler pairs are [0,7], [3,2], [-2,4], [3,6], [-1,3], [-4,5], and [-3,7], and the corresponding complex The payoff norms are 0.9084, 0.7838, 0.7262, 0.5209, 0.4132, 0.3333, and 0.2989, respectively.

[0052] It should be understood that the value of the first number F can be adjusted to balance feedback overhead and feedback accuracy, and that in the same transmission environment and feedback mechanism, the larger F is, the smaller the feedback overhead and the lower the feedback accuracy.

[0053] It should be understood that the first and second devices must perform information feedback and restoration based on the same threshold value α or first number F. In one embodiment, the threshold value α and the first number F are: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0054] The target channel information determined by the first device based on the selected delay-Doppler pair is: location information in the delay-Doppler domain of delay-Doppler pairs that satisfy a first condition; and a complex gain corresponding to the delay-Doppler pair that satisfies the first condition.

[0055] In one embodiment, both the location information and the complex gain of the selected delay-Doppler pair can be target channel information.

[0056] In another embodiment, the target channel information may be only the location information of the selected delay-Doppler pair.

[0057] In step S602, the first device transmits target feedback information to the second device. Here, the target feedback information is associated with target channel information, and the target channel information is all or part of channel information in the delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second or third device.

[0058] Before step S602, there are various feedback methods for the first device to determine the target feedback information to be sent to the second device based on the target channel information. In one embodiment, the first device directly quantifies the target channel information as the target feedback information.

[0059] When the target channel information includes position information and complex gain of a selected delay-Doppler pair, the first device directly quantifies both the position information and complex gain of the selected delay-Doppler pair as target feedback information.When the target channel information includes only position information of the selected delay-Doppler pair, the first device directly quantifies the position information of the selected delay-Doppler pair as target feedback information.

[0060] In one embodiment, the floating-point precision of the complex gains corresponding to the delay-Doppler pairs in the target feedback information is determined by a second parameter, the second parameter being: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0061] In another embodiment, the first device determines target feedback information based on a target codebook selected from a codebook set according to the target channel information, specifically: In one embodiment, the first device may select a codebook from a codebook set that is most similar to the target channel information, and determine target feedback information based on the most similar codebook. The target feedback information may be an index of the most similar codebook, and the first device may transmit the index of the most similar codebook to the second device. The second device may find a corresponding codebook from the codebook set based on the received index, and then reconstruct the target channel information based on the found codebook. The found codebook can then be used as the target channel information, and the channel information in the delayed Doppler domain can be reconstructed.

[0062] In another embodiment, when the target channel information is represented by a weighted sum of multiple codebooks in the codebook set, target feedback information is determined based on the weighted sum of the multiple codebooks. A first device selects multiple codebooks from the codebook set and represents the target channel information as the weighted sum of the multiple codebooks. In one embodiment, the first device may determine target feedback information based on the weighted sum of the multiple codebooks, including an index and a corresponding weight of each codebook, and transmit the index and the corresponding weight of each codebook to the second device. The second device finds corresponding codebooks from the codebook set based on the received index, and recovers the target channel information based on the weight of each codebook, thereby obtaining the channel information in the delay Doppler domain.

[0063] In one embodiment, the floating point precision of the weight values ​​is determined by a fourth parameter, the fourth parameter being: Protocol decisions and and / or by first signaling exchanged between the first and second devices.

[0064] Furthermore, when target feedback information is determined and fed back based on a target codebook selected from a codebook set according to the target channel information, the target codebook is a first codebook obtained by a delay value and a Doppler value corresponding to each delay-Doppler pair in the target channel information, each first codebook being for indicating a combination of position information of a set of delay-Doppler pairs; second codebooks obtained by complex gains corresponding to each delay-Doppler pair in the target channel information, each second codebook for indicating a combination of complex gains of a set of delay-Doppler pairs; and a third codebook obtained by a delay value and a Doppler value corresponding to each delay-Doppler pair in the target channel information and a complex gain corresponding to each delay-Doppler pair, each third codebook being for indicating a combination of position information of a set of delay-Doppler pairs and a corresponding complex gain.

[0065] It should be understood that if the target channel information includes only the position information of the delay-Doppler pairs, a first codebook may be selected from the codebook set as the target codebook, and the target feedback information may be determined based on the selected first codebook. If it is determined that the target channel information includes the position information of the delay-Doppler pairs and the complex gain, a first codebook and a second codebook may be selected from two codebook sets as the target codebooks, and the target feedback information may be determined based on the selected first codebook and second codebook, or a third codebook may be selected from the codebook set as the target codebook, and the target feedback information may be determined based on the selected third codebook.

[0066] In one embodiment, the first signaling exchanged between the first device and the second device comprises: Radio resource control signaling; and Layer 1 signaling of a physical downlink control channel; and information on a physical downlink shared channel; signaling of a medium access control layer control element; and a system information block; Layer 1 signaling of the physical uplink control channel; and MSG 1 information for the physical random access channel; MSG 3 information of the physical random access channel; MSG A information of the physical random access channel; information on the physical uplink shared channel; Xn interface signaling; PC5 interface signaling and Sidelink interface signaling.

[0067] In one embodiment, the first device is configured to: At least one parameter among the threshold, the first number, the first parameter, the second parameter, the third parameter, and the fourth parameter may be adaptively adjusted; wherein the adaptive adjustment process is triggered by the first device or the second device. R .

[0068] In one embodiment, FIG. 7 shows a flowchart of another delayed Doppler domain channel information feedback method according to an embodiment of the present application, and as shown in FIG. 7, the method includes the following steps S701 to S713.

[0069] In step S701, the first device obtains channel information in the delay Doppler domain. In step S702, a delay-Doppler pair whose norm is greater than a threshold α is selected from each delay-Doppler pair in the delay-Doppler domain, or the top F delay-Doppler pairs whose norms are the largest are selected. In step S703, it is determined whether or not the complex gain is fed back in the feedback information to the second device. If yes, step S704 is executed, and if no, step S705 is executed. In step S704, the position information and complex gain of the selected delay-Doppler pair are taken as target channel information. In step S705, the position information of the selected delay-Doppler pair is set as the target channel information. In step S706, it is determined whether to directly quantify the channel information in the delayed Doppler domain; if yes, execute step S707; if no, execute step S709 based on the codebook set. In step S707, the target channel information is directly quantified as the target feedback information. In step S708, the target feedback information is sent to the second device. In step S709, it is determined whether or not the method using only the codebook is to be adopted. If yes, step S710 is executed, and if no, step S712 is executed. In step S710, a codebook that is most similar to the target channel information is selected from the codebook set. In step S711, based on the most similar codebook, feed back the identifier of the codebook to the second device. In step S712, the target channel information is represented by a weighted sum of a plurality of codebooks in the codebook set. In step S713, Feedback the identifiers of the plurality of codebooks and the corresponding weights to the second device. .

[0070] Therefore, the embodiments of the present application provide a method for feedback of delay-Doppler domain channel information, in which a first device obtains the norm of the complex gain of each delay-Doppler pair, and obtains target channel information based on the delay-Doppler pair whose norm is greater than a threshold or the first number of delay-Doppler pairs whose norm is the largest. Then, the target feedback information is obtained by direct quantification or based on a codebook set, respectively, and transmitted to a second device, thereby accurately transmitting the delay-Doppler domain channel information. Depending on the method for determining the target channel information and the target feedback information, a balance can be achieved between feedback overhead and feedback accuracy.

[0071] Based on the above embodiment, further, after the first device performs channel estimation, the method includes: The first device may further include obtaining a first parameter based on a delay Doppler domain channel estimation result or a delay Doppler domain vectorized equivalent channel matrix estimation result, and feeding the first parameter back to the second device; The first parameter is A channel quality indicator (CQI); A precoding matrix indicator (PMI), Rank indicator (RI), A channel state information resource indicator (CSI-RS Resource Indicator, CRI); a Synchronization Signal and PBCH block Resource Indicator (SSBRI); Layer Indicator (LI), and L1 Reference Signal Received Power (L1-RSRP).

[0072] Therefore, the embodiments of the present application provide a method for feedback of delay Doppler domain channel information, in which a first device obtains a first parameter based on a delay Doppler domain channel estimation result or a delay Doppler domain vectorized equivalent channel matrix estimation result, and feeds it back to the second device, thereby accurately transmitting delay Doppler domain channel information, and balancing feedback overhead and feedback accuracy through the method of determining target channel information and target feedback information.

[0073] It should be noted that the delayed Doppler domain channel information feedback method provided in the embodiments of the present application may be implemented by a delayed Doppler domain channel information feedback device or a control module for implementing the delayed Doppler domain channel information feedback method in the delayed Doppler domain channel information feedback device. In the embodiments of the present application, the delayed Doppler domain channel information feedback device is used to implement the delayed Doppler domain channel information feedback method, and the delayed Doppler domain channel information feedback device provided in the embodiments of the present application will be described.

[0074] FIG. 8 shows a structural schematic diagram of a delay Doppler domain channel information feedback device according to an embodiment of the present application. As shown in FIG. 8, the device includes: a measurement module 801 and a feedback module 802 .

[0075] The measurement module 801 is for performing channel estimation on a target signal to obtain target channel information in a delay Doppler domain, and the feedback module 802 is for sending target feedback information to a second device; Here, the target feedback information is associated with the target channel information, and the target signal is a signal transmitted from the second device or the third device to the first device.

[0076] Therefore, an embodiment of the present application provides a feedback device for delayed Doppler domain channel information, and transmits target feedback information to a second device, where the target feedback information is associated with target channel information, and the target channel information is all or part of the channel information of the delayed Doppler domain obtained by the first device performing channel estimation on a target signal, and the target signal is a signal transmitted to the first device by the second device or a third device, thereby accurately transmitting the channel information of the delayed Doppler domain, and balancing feedback overhead and feedback accuracy through methods for determining the target channel information and the target feedback information.

[0077] Based on the above embodiment, further, the target channel information includes all delay-Doppler pairs in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair, where the delay-Doppler pair is determined by a pair of delay values ​​and Doppler values, and is for indicating a region indicated by the pair of delay values ​​and Doppler values ​​in the delay-Doppler domain.

[0078] Furthermore, the feedback module further comprises: directly quantifying the target channel information as target feedback information; determining target feedback information based on a target codebook selected from a codebook set according to the target channel information.

[0079] Furthermore, when directly quantifying the target channel information, the floating-point precision of the complex gain corresponding to the delay-Doppler pair in the target feedback information is determined by a second parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0080] Furthermore, the step of determining target feedback information based on a target codebook selected from a codebook set according to the target channel information further comprises: selecting a codebook from a set of codebooks that is most similar to the target channel information, and determining target feedback information based on the most similar codebook; and if the target channel information is indicated by a weighted sum of a plurality of codebooks in the codebook set, determining target feedback information based on the weighted sum of the plurality of codebooks.

[0081] Furthermore, the step of determining target feedback information based on a weighted sum of the plurality of codebooks further comprises: The method further includes a step of using an identifier and a corresponding weight value of each of the plurality of codebooks as target feedback information based on the weighted sum of the plurality of codebooks.

[0082] The target codebook selected from the codebook set according to the target channel information is a first codebook obtained by delay and Doppler values ​​corresponding to each delay-Doppler pair in the target channel information; a second codebook obtained by complex gains corresponding to each delay-Doppler pair in the target channel information; a delay value and a Doppler value corresponding to each delay-Doppler pair in the target channel information, and a third codebook obtained by a complex gain corresponding to each delay-Doppler pair.

[0083] Furthermore, the floating-point precision of the weight value is determined by a fourth parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0084] Furthermore, the first signaling Radio resource control signaling; and Layer 1 signaling of a physical downlink control channel; and information on a physical downlink shared channel; signaling of a medium access control layer control element; and a system information block; Layer 1 signaling of the physical uplink control channel; and MSG 1 information for the physical random access channel; MSG 3 information of the physical random access channel; MSG A information of the physical random access channel; information on the physical uplink shared channel; Xn interface signaling; PC5 interface signaling and Sidelink interface signaling.

[0085] Therefore, the embodiments of the present application provide a feedback device for delay Doppler domain channel information, and the delay Doppler domain channel information obtained by estimation is used as target channel information. The target feedback information is obtained by direct quantification or based on a codebook set, and transmitted to the second device, thereby accurately transmitting the delay Doppler domain channel information. The method for determining the target channel information and the target feedback information can balance feedback overhead and feedback accuracy.

[0086] Based on the above embodiment, further, the measurement module is for obtaining a norm of a complex gain corresponding to each delay-Doppler pair in the delay-Doppler domain, and determining target channel information based on the delay-Doppler pair that satisfies a first condition; Here, the delay-Doppler pair that satisfies the first condition is delay-Doppler pairs whose norm is greater than a threshold; a first number of delay-Doppler pairs with a maximum norm;

[0087] Furthermore, the norm is a modulus value of the complex gain or a target power of the modulus value of the complex gain.

[0088] Furthermore, the floating-point precision of the norm is determined by a third parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0089] Furthermore, the threshold value and the first number are Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0090] Furthermore, the target channel information location information in the delay-Doppler domain of delay-Doppler pairs that satisfy a first condition; and a complex gain corresponding to the delay-Doppler pair that satisfies the first condition.

[0091] In addition, the measurement module may further be configured to: and adaptively adjusting at least one parameter among the threshold, the first number, the first parameter, the second parameter, the third parameter, and the fourth parameter; Here, the process of adaptive adjustment is triggered by the first device or the second device.

[0092] Therefore, the embodiments of the present application provide a delay-Doppler domain channel information feedback device, which obtains the norm of the complex gain of each delay-Doppler pair, obtains target channel information based on the delay-Doppler pair whose norm is greater than a threshold or the first number of delay-Doppler pairs whose norm is the largest, and then obtains and sends the target feedback information to the second device by direct quantification or based on a codebook set, respectively, so as to accurately transmit the delay-Doppler domain channel information, and can balance feedback overhead and feedback accuracy depending on the method for determining the target channel information and the target feedback information.

[0093] According to the above embodiment, further, the feedback module is for obtaining a first parameter according to a delay Doppler domain channel estimation result or a delay Doppler domain vectorized equivalent channel matrix estimation result, and feeding the first parameter back to the second device; The first parameter is a channel quality indicator; a precoding matrix indicator; and A rank indicator, a channel state information resource indicator; and a synchronization signal block resource indicator; Layer indicators and and L1 reference signal received power.

[0094] Therefore, the embodiments of the present application provide a delay Doppler domain channel information feedback device, and obtain a first parameter based on the delay Doppler domain channel estimation result or the delay Doppler domain vectorized equivalent channel matrix estimation result, and feed it back to the second device, thereby accurately transmitting the delay Doppler domain channel information, and balancing feedback overhead and feedback accuracy through the method of determining target channel information and target feedback information.

[0095] The delay Doppler domain channel information feedback device in the embodiment of the present application may be a device, a device or electronic equipment having an operating system, or may be a component, integrated circuit, or chip in a terminal. The device or electronic equipment may be a portable terminal or a non-portable terminal. For example, the portable terminal may be any of the terminals listed above. the last The non-portable terminal may include, but is not limited to, a server, a network attached storage (NAS), a personal computer (PC), a television (TV), an automated teller machine (ATM), a kiosk, etc., and is not specifically limited in the embodiments of the present application.

[0096] The delayed Doppler domain channel information feedback device provided in the embodiments of the present application can implement each process implemented in the method embodiments of Figures 2 to 7, and achieve the same technical effects. In order to avoid duplication, detailed descriptions will be omitted here.

[0097] Optionally, as shown in Fig. 9, an embodiment of the present application further provides a communication device 900, which includes a processor 901, a memory 902, and a program or command stored in the memory 902 and executable on the processor 901. For example, if the communication device 900 is a terminal, the program or command can be executed by the processor 901 to realize each process of the embodiment of the method for feedback of delayed Doppler domain channel information, thereby achieving the same technical effects. If the communication device 900 is a network-side device, the program or command can be executed by the processor 901 to realize each process of the embodiment of the method for feedback of delayed Doppler domain channel information, thereby achieving the same technical effects. To avoid repetition, detailed descriptions will be omitted here.

[0098] An embodiment of the present application further provides a terminal, which includes a processor and a communication interface, wherein the processor is for performing channel estimation on a target signal to obtain target channel information in a delay Doppler domain, and the communication interface is for sending target feedback information to a second device. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and the implementation processes and embodiments of the above-mentioned method embodiments can all be applied to this terminal embodiment, and the same technical effects can be achieved. Specifically, Figure 10 is a schematic diagram of the hardware structure of a terminal implementing this embodiment of the present application.

[0099] The terminal 1000 includes at least some of the following components, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

[0100] Those skilled in the art will understand that the terminal 1000 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 1010 through a power management system, which may further realize functions such as charge / discharge management and power consumption management. The structure of the terminal shown in Figure 10 is not intended to limit the terminal, and the terminal may include more or fewer components than those shown, or a combination of some components, or a different component arrangement, and detailed descriptions thereof will be omitted here.

[0101] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 that processes image data of still or video images captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode, and a microphone 10042. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. The other input devices 10072 may include, but are not limited to, a physical keyboard, function buttons (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, and a control lever, and detailed description thereof will be omitted here.

[0102] In the embodiment of the present application, the radio frequency unit 1001 receives downlink data from the network side device, processes the data in the processor 1010, and transmits uplink data to the network side device. Typically, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a receiver / transmitter, a coupler, a low-noise amplifier, a duplexer, etc.

[0103] The memory 1009 can be used to store software programs or commands and various data. The memory 1009 may primarily include a program or command storage area capable of storing an operating system, an application or command required for at least one function (e.g., audio playback function, image playback function, etc.), and a data storage area. The memory 1009 may also include high-speed random access memory and may further include non-transitory memory. The non-transitory 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, the non-transitory memory may include at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device.

[0104] The processor 1010 may include one or more processing units. Optionally, the processor 1010 may integrate an application processor that mainly processes an operating system, a user interface, and applications or commands, and a modem processor that mainly processes wireless communications, such as a baseband processor. It is understood that the modem processor need not be integrated into the processor 1010.

[0105] Among them, the high frequency unit 1001 is for transmitting target feedback information to the second device; Here, the target feedback information is associated with the target channel information, and the target signal is a signal transmitted from the second device or the third device to the first device.

[0106] Processor 1010 is for performing channel estimation on the target signal to obtain target channel information in the delay-Doppler domain.

[0107] The embodiments of the present application accurately transmit channel information in the delay Doppler domain, and can balance feedback overhead and feedback accuracy through methods for determining target channel information and target feedback information.

[0108] Optionally, the target channel information includes all delay-Doppler pairs in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair, where the delay-Doppler pair is determined by a pair of delay and Doppler values ​​and is for indicating a region in the delay-Doppler domain indicated by the pair of delay and Doppler values.

[0109] Furthermore, the high frequency unit 1001 further comprises: directly quantifying the target channel information as target feedback information; determining target feedback information based on a target codebook selected from a codebook set according to the target channel information.

[0110] Furthermore, when directly quantifying the target channel information, the floating-point precision of the complex gain corresponding to the delay-Doppler pair in the target feedback information is determined by a second parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0111] Furthermore, the step of determining target feedback information based on a target codebook selected from a codebook set according to the target channel information further comprises: selecting a codebook from a set of codebooks that is most similar to the target channel information, and determining target feedback information based on the most similar codebook; and if the target channel information is indicated by a weighted sum of a plurality of codebooks in the codebook set, determining target feedback information based on the weighted sum of the plurality of codebooks.

[0112] Furthermore, the step of determining target feedback information based on a weighted sum of the plurality of codebooks further comprises: The method further includes a step of using an identifier and a corresponding weight value of each of the plurality of codebooks as target feedback information based on the weighted sum of the plurality of codebooks.

[0113] The target codebook selected from the codebook set according to the target channel information is a first codebook obtained by delay and Doppler values ​​corresponding to each delay-Doppler pair in the target channel information; a second codebook obtained by complex gains corresponding to each delay-Doppler pair in the target channel information; a delay value and a Doppler value corresponding to each delay-Doppler pair in the target channel information, and a third codebook obtained by a complex gain corresponding to each delay-Doppler pair.

[0114] Furthermore, the floating-point precision of the weight value is determined by a fourth parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0115] Furthermore, the first signaling Radio resource control signaling; and Layer 1 signaling of a physical downlink control channel; and information on a physical downlink shared channel; signaling of a medium access control layer control element; and a system information block; Layer 1 signaling of the physical uplink control channel; and MSG 1 information for the physical random access channel; MSG 3 information of the physical random access channel; MSG A information of the physical random access channel; information on the physical uplink shared channel; Xn interface signaling; PC5 interface signaling and Sidelink interface signaling.

[0116] The embodiments of the present application accurately transmit channel information in the delay Doppler domain, and can balance feedback overhead and feedback accuracy through methods for determining target channel information and target feedback information.

[0117] Moreover, the processor 1010 is further configured to obtain a norm of a complex gain corresponding to each delay-Doppler pair in the delay-Doppler domain, and determine target channel information based on the delay-Doppler pairs that satisfy a first condition; Here, the delay-Doppler pair that satisfies the first condition is delay-Doppler pairs whose norm is greater than a threshold; a first number of delay-Doppler pairs with a maximum norm;

[0118] Furthermore, the norm is a modulus value of the complex gain or a target power of the modulus value of the complex gain.

[0119] Furthermore, the floating-point precision of the norm is determined by a third parameter, which is Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0120] Furthermore, the threshold value and the first number are Protocol decisions and and / or by first signaling exchanged between the device and a second device.

[0121] Furthermore, the target channel information location information in the delay-Doppler domain of delay-Doppler pairs that satisfy a first condition; and a complex gain corresponding to the delay-Doppler pair that satisfies the first condition.

[0122] Furthermore, the above Processor 1010 Furthermore, depending on the transmission environment conditions and transmission requirements, and adaptively adjusting at least one parameter among the threshold, the first number, the first parameter, the second parameter, the third parameter, and the fourth parameter; Here, the process of adaptive adjustment is triggered by the first device or the second device.

[0123] The embodiments of the present application accurately transmit channel information in the delay Doppler domain, and can balance feedback overhead and feedback accuracy through methods for determining target channel information and target feedback information.

[0124] Furthermore, the processor 1010 is further configured to obtain a first parameter based on the delay-Doppler domain channel estimation result or the delay-Doppler domain vectorized equivalent channel matrix estimation result, and feed the first parameter back to the second device; The first parameter is a channel quality indicator; a precoding matrix indicator; and A rank indicator, a channel state information resource indicator; and a synchronization signal block resource indicator; Layer indicators and and L1 reference signal received power.

[0125] The embodiments of the present application accurately transmit channel information in the delay Doppler domain, and can balance feedback overhead and feedback accuracy through methods for determining target channel information and target feedback information.

[0126] An embodiment of the present application further provides a network side device, which includes a processor and a communication interface, the processor is for performing channel estimation on a target signal to obtain target channel information in a delay Doppler domain, and the communication interface is for sending target feedback information to a second device. The embodiment of the network side device corresponds to the method embodiment of the network side device, and each implementation process and embodiment of the method embodiment can be applied to the embodiment of the network side device to achieve the same technical effects.

[0127] Specifically, an embodiment of the present application further provides a network side device. As shown in Figure 11, the network device 1100 includes an antenna 111, a radio frequency device 112, and a baseband device 113. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111 and transmits the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be transmitted and transmits it to the radio frequency device 112, and the radio frequency device 112 processes the received information before transmitting it via the antenna 111.

[0128] The above-mentioned frequency band processing device may be in the baseband device 113 , and the method performed by the network side device in the above-mentioned embodiment may be realized in the baseband device 113 , which includes a processor 114 and a memory 115 .

[0129] The baseband device 113 may include, for example, at least one baseband board having multiple chips installed thereon, and as shown in FIG. 11, one of the chips may be, for example, a processor 114 connected to a memory 115 to call a program in the memory 115 to perform the operations of the network equipment illustrated in the above method embodiments.

[0130] The baseband device 113 may further include a network interface 116 for communicating with the radio frequency device 112, the interface being, for example, a common public radio interface (CPRI).

[0131] Specifically, the network side device of the embodiment of the present invention further includes a command or program stored in memory 115 and executable on processor 114, and processor 114 calls the command or program in memory 115 to execute the method performed by each module shown in Figure 6, thereby achieving the same technical effect. In order to avoid duplication, detailed description will be omitted here.

[0132] An embodiment of the present application further provides a readable storage medium, which stores a program or command. When the program or command is executed by a processor, each process of the embodiment of the method for feedback of delayed Doppler domain channel information is realized, and the same technical effects can be achieved. To avoid duplication, detailed descriptions are omitted here.

[0133] The processor may be the processor in the terminal described in the above embodiment. The readable storage medium may include a computer readable storage medium such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0134] An embodiment of the present application further provides a chip, the chip including a processor and a communication interface, the communication interface and the processor are coupled together, and the processor executes programs or commands to perform each process of the embodiment of the above-mentioned delayed Doppler domain channel information feedback method, which can achieve the same technical effects, and detailed descriptions are omitted here to avoid duplication.

[0135] It should be understood that the chips referred to in the embodiments of this application may also be referred to as system level chips, system chips, chip systems, or system-on-chips, etc.

[0136] It should be noted that, as used herein, the terms "comprise," "consist," or any other variation thereof, are intended to include a non-exclusive inclusion, whereby a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not expressly specified or elements inherent in such process, method, article, or apparatus. Unless otherwise specified, elements qualified by the phrase "comprise a" do not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element. It should also 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 include performing functions substantially simultaneously or in the reverse order, depending on such functionality. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to one example may be combined in other examples.

[0137] From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be realized in the form of a combination of software and a necessary common hardware platform, and of course, they can also be realized by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical solutions of the present application can be substantially embodied in the form of a computer software product, which is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes a plurality of commands that cause a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0138] Although the examples of the present application have been described above with reference to the drawings, the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative and not limiting. Based on the suggestions of the present application, many forms that a person skilled in the art can make without departing from the spirit of the present application and the scope of protection of the claims are all within the scope of protection of the present application. [Explanation of symbols]

[0139] 11 1st device 12 2nd device 111 Antenna 112 High Frequency Device 113 Baseband Equipment 114 processors 115 memory 116 Network Interface 801 Measurement Module 802 Feedback Module 900 Communication Equipment 901 processor 902 memory 1000 devices 1001 High Frequency Unit 1002 Network Module 1003 Audio Output Unit 1004 Input Unit 1005 Sensor 1006 Display Unit 1007 User Input Unit 1008 Interface Unit 1009 Memory 1010 processor 1100 Network Equipment 10041 Graphics Processing Unit 10042 Microphone 10061 Display panel 10071 Touch Panel 10072 Input Device

Claims

1. A step of receiving a target signal transmitted from a second device or a third device; performing channel estimation on the target signal to obtain target channel information including all or part of the channel information in the delay Doppler domain; determining target feedback information based on the target channel information; a first device transmitting the target feedback information to the second device; the target channel information includes all delay-Doppler pairs in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair, the delay-Doppler pair being determined by a pair of delay and Doppler values, and for indicating a region in the delay-Doppler domain indicated by the pair of delay and Doppler values; A method for feedback of delayed Doppler domain channel information.

2. obtaining a norm of a complex gain corresponding to each delay-Doppler pair in the delay-Doppler domain; and determining target channel information based on the delay-Doppler pairs that satisfy a first condition; The delay-Doppler pair that satisfies the first condition is delay-Doppler pairs whose norm is greater than a threshold; a first number of delay-Doppler pairs with a maximum norm; the norm is a modulus value of the complex gain or a target power of the modulus value of the complex gain; The target channel information is location information in the delay-Doppler domain of delay-Doppler pairs that satisfy a first condition; and a complex gain corresponding to the delay-Doppler pair that satisfies the first condition.

3. Before the first device transmits the target feedback information to the second device, directly quantifying the target channel information as target feedback information; and determining target feedback information based on a target codebook selected from a codebook set according to the target channel information.

4. determining target feedback information based on a target codebook selected from a codebook set according to the target channel information; selecting a codebook from a set of codebooks that is most similar to the target channel information, and determining target feedback information based on the most similar codebook; and when the weighted sum of a plurality of codebooks in the codebook set indicates the target channel information, determining target feedback information based on the weighted sum of the plurality of codebooks; determining target feedback information based on a weighted sum of the plurality of codebooks; The method of claim 3 , further comprising: determining, based on a weighted sum of the plurality of codebooks, an identifier and a corresponding weight value of each of the plurality of codebooks as target feedback information.

5. The target codebook selected from the codebook set according to the target channel information is a first codebook obtained by delay and Doppler values ​​corresponding to each delay-Doppler pair in the target channel information; a second codebook obtained by complex gains corresponding to each delay-Doppler pair in the target channel information; and a third codebook obtained by a delay value and a Doppler value corresponding to each delay-Doppler pair in the target channel information, and a complex gain corresponding to each delay-Doppler pair.

6. When the target channel information is directly quantified, the floating-point precision of the complex gain corresponding to the delay-Doppler pair in the target feedback information is determined by a second parameter, which is Protocol decisions and 4. The method of claim 3, wherein the determination is at least one of: by first signaling exchanged between the first and second devices;

7. The floating-point precision of the norm is determined by a third parameter, which is Protocol decisions and by first signaling exchanged between the first device and the second device; The threshold value and the first number are Protocol decisions and 3. The method of claim 2, wherein the determination is at least one of: by first signaling exchanged between the first and second devices;

8. The floating-point precision of the weight value is determined by a fourth parameter, which is Protocol decisions and 5. The method of claim 4, wherein the determination is at least one of: by first signaling exchanged between the first and second devices; 9. A feedback device for delayed Doppler domain channel information for receiving a target signal transmitted from a second device or a third device, comprising: a measurement module for performing channel estimation on the target signal to obtain target channel information including all or part of the channel information in a delay Doppler domain; The apparatus is further adapted to determine target feedback information based on the target channel information; The device further comprises: a feedback module for transmitting the target feedback information to the second device; the target channel information includes all delay-Doppler pairs in the delay-Doppler domain and a complex gain corresponding to each delay-Doppler pair, the delay-Doppler pair being determined by a pair of delay and Doppler values, and for indicating a region in the delay-Doppler domain indicated by the pair of delay and Doppler values; Delayed Doppler domain channel information feedback device.

10. the measurement module is for obtaining a norm of a complex gain corresponding to each delay-Doppler pair in the delay-Doppler domain, and determining target channel information based on the delay-Doppler pairs that satisfy a first condition; The delay-Doppler pair that satisfies the first condition is delay-Doppler pairs whose norm is greater than a threshold; a first number of delay-Doppler pairs with a maximum norm; the norm is a modulus value of the complex gain or a target power of the modulus value of the complex gain; The target channel information is location information in the delay-Doppler domain of delay-Doppler pairs that satisfy a first condition; and a complex gain corresponding to the delay-Doppler pair that satisfies the first condition.

11. A computer program stored on a storage medium, the computer program being configured to implement the steps of the delayed Doppler domain channel information feedback method according to any one of claims 1 to 8 when executed by at least one processor.

12. A chip comprising a processor and a communication interface, the communication interface and the processor being coupled together, the processor executing a program or command to implement the steps of the delayed Doppler domain channel information feedback method of any one of claims 1 to 8.

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