阅读说明：本技术 信道信息的处理方法及装置 (Channel information processing method and device ) 是由 李建军 宋扬 孙鹏 于 2020-05-28 设计创作，主要内容包括：本申请公开了一种信道信息的处理方法及装置,其中,该方法包括：从终端接收第一信息和第二信息；其中,所述第一信息包括不具有上下行信道互易性的第一参数,所述第一参数基于下行信道估计确定,所述第二信息用于指示具有上下行信道互易性的第二参数与第三参数之间的偏差,所述第二参数基于上行信道估计确定,所述第三参数基于下行信道估计确定；根据所述第一信息、所述第二信息和所述第二参数,确定下行信道的信道信息。通过本申请,解决了现有技术在大规模MIMO系统中,由于天线数量巨大导致信道估计与反馈所需的导频开销和反馈开销大的问题。(The application discloses a channel information processing method and device, wherein the method comprises the following steps: receiving first information and second information from a terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation; and determining the channel information of the downlink channel according to the first information, the second information and the second parameter. By the method and the device, the problem that in a large-scale MIMO system in the prior art, due to the fact that the number of antennas is large, pilot frequency overhead and feedback overhead required by channel estimation and feedback are large is solved.)

1. A channel information processing method is applied to a network side device, and is characterized by comprising the following steps:

receiving first information and second information from a terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation;

and determining the channel information of the downlink channel according to the first information, the second information and the second parameter.

2. The method of claim 1, wherein prior to receiving the first information and the second information from the terminal, the method further comprises:

performing channel estimation on an uplink channel, and determining the second parameter from a result of the channel estimation;

and sending the second parameter to the terminal.

3. The method of claim 1, further comprising:

and receiving third information from the terminal, wherein the third information comprises a fourth parameter corresponding to a first path, and the paths corresponding to the first path and the second parameter are different.

4. The method of claim 3, wherein the determining the channel information of the downlink channel comprises:

and determining channel information of a downlink channel according to the first information, the second information, the third information and the second parameter.

5. The method according to claim 1, wherein the second parameter and the third parameter each comprise a time delay of a target path and/or a spatial angle of the target path.

6. The method of claim 5, wherein the target path is at least one of: the path indicated by the network side equipment, the path of which the deviation between the second parameter and the third parameter is greater than the threshold value, and the path measured by the terminal.

7. The method according to claim 5, wherein the second information is used to indicate a deviation between the time delay in the second parameter and the time delay in the third parameter when the time delay of the target path and the spatial angle of the target path are included in both the second parameter and the third parameter.

8. The method of claim 2, wherein performing channel estimation on the uplink channel and determining the second parameter from the result of channel estimation comprises:

estimating uplink channel information to obtain a first uplink channel estimation result on a frequency domain;

performing Fourier transform on the first uplink channel estimation result to obtain a second uplink channel estimation result on a time domain;

and determining the time delay of a target path and/or the space angle of the target path from the second uplink channel estimation result.

9. The method of claim 1, wherein determining channel information of a downlink channel according to the first information, the second information, and the second parameter comprises:

inputting the first information into a target neural network to obtain fourth information;

and determining the channel information of the downlink channel according to the fourth information, the second information and the second parameter.

10. The method of claim 9, wherein the target neural network is obtained by training an initial neural network through a preset training set; the preset training set comprises first information acquired at a plurality of historical moments.

11. The method of claim 10, wherein the first parameter in the first information is a gain on a target path.

12. A method for processing channel information is applied to a terminal, and is characterized by comprising the following steps:

the method comprises the steps of sending first information and second information to network side equipment, wherein the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

13. The method of claim 12, wherein before sending the first information and the second information to the network-side device, the method comprises:

and performing channel estimation on a downlink channel, and determining the first parameter and the third parameter from the result of the channel estimation.

14. The method of claim 12, wherein before sending the first information and the second information to the network-side device, the method further comprises:

and receiving the second parameter sent by the network side equipment.

15. The method of claim 12, wherein the method comprises:

and sending third information to the network side equipment, wherein the third information comprises a fourth parameter corresponding to a first path, and the paths corresponding to the first path and the second parameter are different.

16. The method according to claim 14, wherein the second parameter and the third parameter each comprise a time delay of the target path and/or a spatial angle of the target path.

17. The method according to claim 16, wherein the second information is used to indicate a deviation between the time delay in the second parameter and the time delay in the third parameter when the time delay of the target path and the spatial angle of the target path are included in both the second parameter and the third parameter.

18. The method of claim 13, wherein performing channel estimation on a downlink channel and determining the first parameter from a result of the channel estimation comprises:

performing channel estimation on a downlink channel to obtain a first downlink channel estimation result on a frequency domain;

performing two-dimensional Fourier transform on the first downlink channel estimation result to obtain a second downlink channel estimation result on a time domain;

and determining the time delay of the target path and/or the space angle of the target path from the second downlink channel estimation result.

19. An apparatus for processing channel information, comprising:

the first receiving module is used for receiving the first information and the second information from the terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation;

a first determining module, configured to determine channel information of a downlink channel according to the first information, the second information, and the second parameter.

20. The apparatus of claim 19, further comprising:

a first processing module, configured to perform channel estimation on an uplink channel before receiving the first information and the second information from the terminal, and determine the second parameter from a result of the channel estimation;

and the first sending module is used for sending the second parameter to the terminal.

21. The apparatus of claim 19,

and the second receiving module is used for receiving third information from the terminal, wherein the third information comprises a fourth parameter corresponding to the first path, and the paths corresponding to the first path and the second parameter are different.

22. The apparatus of claim 21, wherein the first determining module is further configured to determine channel information of a downlink channel according to the first information, the second information, the third information, and the second parameter.

23. The apparatus of claim 19, wherein the second parameter and the third parameter each comprise a time delay of a target path and/or a spatial angle of the target path.

24. The apparatus of claim 23, wherein the target path is at least one of: the path indicated by the network side equipment, the path of which the deviation between the second parameter and the third parameter is greater than the threshold value, and the path measured by the terminal.

25. The apparatus of claim 23, wherein the second information is used to indicate a deviation between the delay in the second parameter and the delay in the third parameter when the delay of the target path and the spatial angle of the target path are included in the second parameter and the third parameter.

26. The apparatus of claim 20, wherein the first processing module comprises:

the first processing unit is used for estimating uplink channel information to obtain a first uplink channel estimation result on a frequency domain;

the second processing unit is used for carrying out Fourier transform on the first uplink channel estimation result to obtain a second uplink channel estimation result on a time domain;

and a third processing unit, configured to determine a time delay of a target path and/or a spatial angle of the target path from the second uplink channel estimation result.

27. The apparatus of claim 19, wherein the first determining module comprises:

the first input unit is used for inputting the first information into a target neural network to obtain fourth information;

a first determining unit, configured to determine channel information of a downlink channel according to the fourth information, the second information, and the second parameter.

28. The apparatus of claim 27, wherein the target neural network is obtained by training an initial neural network through a preset training set; the preset training set comprises first information acquired at a plurality of historical moments.

29. The apparatus of claim 28, wherein the first parameter in the first information is a gain on a target path.

30. An apparatus for processing channel information, comprising:

a second sending module, configured to send first information and second information to a network side device, where the first information includes a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used to indicate a deviation between a second parameter with reciprocity of uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

31. The apparatus of claim 30, wherein the apparatus comprises:

and the second processing module is used for performing channel estimation on a downlink channel before the first information and the second information are sent to the network side equipment, and determining the first parameter and the third parameter from the result of the channel estimation.

32. The apparatus of claim 30, further comprising:

and the third receiving module is configured to receive the second parameter sent by the network-side device before sending the first information and the second information to the network-side device.

33. The apparatus of claim 30, wherein the apparatus comprises:

and a third sending module, configured to send third information to the network side device, where the third information includes a fourth parameter corresponding to the first path, and a path corresponding to the first path is different from a path corresponding to the second parameter.

34. The apparatus of claim 30, wherein the second parameter and the third parameter each comprise a time delay of the target path and/or a spatial angle of the target path.

35. The apparatus of claim 34, wherein the second information is used to indicate a deviation between the delay in the second parameter and the delay in the third parameter when the delay in the target path and the spatial angle of the target path are included in the second parameter and the third parameter.

36. The apparatus of claim 31, wherein the second processing module comprises:

the fourth processing unit is configured to perform channel estimation on the downlink channel to obtain a first downlink channel estimation result in the frequency domain;

a fifth processing unit, configured to perform two-dimensional fourier transform on the first downlink channel estimation result to obtain a second downlink channel estimation result in a time domain;

a sixth processing unit, configured to determine, from the second downlink channel estimation result, a time delay of a target path and/or a spatial angle of the target path.

37. A terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method of processing channel information according to any one of claims 1-11.

38. A network side device, comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method for processing channel information according to any one of claims 12 to 18.

39. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions which, when executed by a processor, implement the steps of the method for processing channel information according to any one of claims 1-11, or implement the steps of the method for processing channel information according to any one of claims 12-18.

Technical Field

The present application belongs to the field of communications, and in particular, to a method and an apparatus for processing channel information.

Background

The large-scale antenna array formed by using the large-scale MIMO (Multiple-In Multiple-Out) technology can simultaneously support more users to send and receive signals, thereby improving the channel capacity and data flow of a mobile network by tens of times or more and simultaneously realizing the rapid reduction of the interference among the Multiple users.

However, in a large-scale MIMO system based on FDD (Frequency Division duplex), a transmitting end acquires channel information to complete precoding, which requires a receiving end to feed back the channel information. As the size of the antenna increases dramatically, the amount of feedback of channel information increases by orders of magnitude. When combining OFDM and massive MIMO, the channels on different sub-bands are different because of frequency selectivity. Therefore, channel information feedback for a large number of antennas on multiple sub-bands at the same time is required. It can be seen that in a massive MIMO system, the pilot overhead and feedback overhead required for channel estimation and feedback are large due to the large number of antennas.

Disclosure of Invention

An object of the embodiments of the present application is to provide a method and an apparatus for processing channel information, which can solve the problem that in a large-scale MIMO system, the number of antennas is large, which results in large pilot overhead and feedback overhead required for channel estimation and feedback.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, a method for processing channel information is provided, and is applied to a network side device, and includes: receiving first information and second information from a terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation; and determining the channel information of the downlink channel according to the first information, the second information and the second parameter.

In a second aspect, an apparatus for processing channel information is provided, including: the first receiving module is used for receiving the first information and the second information from the terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation; a first determining module, configured to determine channel information of a downlink channel according to the first information, the second information, and the second parameter.

In a third aspect, a method for processing channel information is provided, which is applied to a terminal, and includes: the method comprises the steps of sending first information and second information to network side equipment, wherein the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

In a fourth aspect, an apparatus for processing channel information is provided, including: a second sending module, configured to send first information and second information to a network side device, where the first information includes a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used to indicate a deviation between a second parameter with reciprocity of uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

In a fifth aspect, a network-side device is provided, which comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the method according to the third aspect.

In a sixth aspect, a terminal is provided, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the third aspect.

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

In an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a network-side device program or instruction, implement the method according to the first aspect, or implement the method according to the third aspect.

In the embodiment of the application, the terminal only needs to feed back the channel information without reciprocity of the uplink and downlink channels and the deviation of the parameter with reciprocity of the uplink and downlink channels to the network side equipment, and the network side equipment can determine the channel information of the downlink channel based on the part of information, so that the pilot frequency and feedback overhead of downlink channel estimation is greatly reduced, and the problem that the pilot frequency overhead and feedback overhead required by channel estimation and feedback are large due to the large number of antennas in a large-scale MIMO system in the prior art is solved.

Drawings

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

fig. 2 is a first flowchart of a channel information processing method in an embodiment of the present application;

fig. 3 is a second flowchart of a channel information processing method in the embodiment of the present application;

fig. 4 is a first schematic structural diagram of a device for processing channel information in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a channel information processing apparatus in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device implementing an embodiment of the present application;

fig. 7 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application;

fig. 8 is a schematic structural diagram of a network-side device for implementing an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The following describes in detail a processing method of channel information provided by the embodiments of the present application through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

First, it should be noted that, the method for processing channel information in the embodiment of the present application relates to interaction between a network side device and a terminal, and the specific flow is as follows:

step S102, the network side equipment sends a second parameter to the terminal; the second parameter is determined based on uplink channel estimation and has reciprocity of uplink and downlink channels;

step S104, the terminal sends first information and second information to the network side equipment, wherein the first information comprises a first parameter without reciprocity of an uplink channel and a downlink channel, and the first parameter is determined based on downlink channel estimation; the second information is used for indicating the deviation between a second parameter with the reciprocity of the uplink and downlink channels and a third parameter; the third parameter is determined based on the downlink channel estimation and has reciprocity of the uplink and downlink channels;

step S106, the network side equipment receives the first information and the second information from the terminal;

step S108, the network side device determines the channel information of the downlink channel according to the first information, the second information and the second parameter.

It can be seen that, according to the embodiment of the present application, the terminal only needs to feed back the channel information without reciprocity of the uplink and downlink channels and the deviation with reciprocity parameters to the network side device, and the network side device determines the channel information of the downlink channel based on the information and the information with reciprocity of the uplink and downlink channels determined by the uplink channel estimation, so that the pilot frequency and feedback overhead of the downlink channel estimation is greatly reduced, and the problem of large pilot frequency overhead and feedback overhead required by the channel estimation and feedback due to the huge number of antennas in the large-scale MIMO system in the prior art is solved.

The following describes a method for processing channel information in the embodiment of the present application from a network-side device and a terminal, respectively.

Referring to fig. 2, fig. 2 is a first flowchart of a method for processing channel information in the embodiment of the present application, and as shown in fig. 2, the method includes the steps of:

step S202, receiving first information and second information from a terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on the uplink channel estimation, and the third parameter is determined based on the downlink channel estimation;

it should be noted that, in the embodiment of the present application, the first information and the second information may be sent through one signaling, or may be sent through two signaling separately, for example: sending first information through a signaling 1, and sending second information through a signaling 2; when the two signals are transmitted separately, the order of transmitting signaling 1 and signaling 2 is not limited.

Step S204, determining the channel information of the downlink channel according to the first information, the second information and the second parameter.

The path found in the terminal downlink channel estimation may be completely the same as or not completely the same as the path found in the network side device uplink channel estimation. Since a situation that a path found in the terminal downlink channel estimation is not exactly the same as a path found in the network side device uplink channel estimation may occur, the second information may include a plurality of deviations for a certain path, for example, the terminal downlink channel estimation obtains third parameters of paths 1,2, 3, and 4, and the network side device uplink channel estimation obtains second parameters of paths 1, 3, and 4, and then the second information reported by the terminal may include: two deviations for path 1, or two deviations for path 3.

Note that, when there is no deviation between the second parameter and the third parameter on all paths (the deviation is 0), or when the deviation is smaller than the threshold value, the second information may be default. Further, the deviation between the second parameter and the third parameter in the embodiment of the present application may be a quantized deviation.

It can be seen that, through the above steps S202 to S204, the terminal only needs to feed back the channel information without reciprocity of the uplink and downlink channels and the deviation of the channel parameter with reciprocity of the uplink and downlink channels to the network side device, and the network side device determines the channel information of the downlink channel based on the part of information, thereby greatly reducing the downlink channel estimation feedback overhead.

It should be noted that, the first parameter in the present application may be a gain of a target path without reciprocity; of course, this is merely an example, and other channel parameters without reciprocity are also within the scope of the present application.

Optionally, in an embodiment of the present application, the method of the present application may further include:

step S200, before receiving the first information from the terminal, performs channel estimation on the uplink channel, and determines the second parameter from the result of the channel estimation.

Step S201, sending a second parameter to the terminal;

as can be seen from the above steps S200 and S201, before the terminal performs channel information feedback, the base station needs to perform uplink channel estimation, and send the parameter with reciprocity between uplink and downlink channels obtained by channel estimation to the terminal.

Optionally, the method steps of the embodiment of the present application, in addition to the steps S200 to S204, may further include:

step S206, receiving third information from the terminal, where the third information includes a fourth parameter corresponding to the first path, and the paths corresponding to the first path and the second parameter are different.

Based on this, in the embodiment of the present application, the method for determining the channel information of the downlink channel may further be: and determining the channel information of the downlink channel according to the first information, the second information, the third information and the second parameter.

It can be seen that, in this embodiment of the present application, a path corresponding to a second parameter obtained by performing uplink channel estimation by a network side device may be a different path from a path corresponding to a fourth parameter obtained by performing downlink channel estimation by a terminal, that is, a path corresponding to the fourth parameter is not found in uplink channel estimation by the network side device, or it is determined that the path corresponding to the fourth parameter is not a strong path in uplink channel estimation by the network side device. That is, for the second parameter and the third parameter of the same path, only the deviation thereof needs to be fed back, and for the channel parameters of different paths, the terminal needs to feed back specific parameter information to the network side device.

Optionally, in this embodiment of the present application, the second parameter may include a time delay of the target path and/or a spatial angle of the target path; and the third parameter in the embodiment of the present application may also include: the time delay of the target path and/or the spatial angle of the target path.

It should be noted that, in the embodiment of the present application, the target path is at least one of the following: a path instructed by the network-side device, a path having a deviation, a path measured by the terminal; the path indicated by the network side device may be a path corresponding to the second parameter, or a measured strong path (e.g., a path with a stronger signal measured in the uplink channel estimation process of the network side device); the path with the deviation may be a path with a deviation between the uplink channel parameter and the downlink channel parameter or a path with a deviation greater than a threshold, for example, a path with a deviation between the second parameter and the third parameter greater than a threshold in this embodiment, where the threshold may be set accordingly as needed. The path measured by the terminal may be a path corresponding to the third parameter, may also be a strong path measured, that is, a path having a strong signal measured by the terminal in the downlink channel estimation process, or may also be a combination of the two.

Furthermore, the target path may be a path in a multi-path delay channel or a path in a single-path delay channel. Further, whether the multipath delay channel or the single-path delay channel, the delay or the spatial angle of each path is the same, so the target path may be any path of the multipath delay channel or the single-path delay channel. In addition, the time delay of the target path and/or the spatial angle of the target path included in the second parameter and the third parameter are only preferred embodiments in the present application, and other channel parameters with reciprocity are also possible, that is, the channel parameters with reciprocity are all within the protection scope of the present application.

Based on this, since the second information in the embodiment of the present application is used to indicate the deviation between the second parameter and the third parameter with the reciprocity of the uplink and downlink channels, that is to say, specifically, it is: a deviation between the time delay in the second parameter and the time delay in the third parameter, or a deviation between the spatial angle in the second parameter and the spatial angle in the third parameter, or a deviation between the time delay in the second parameter and the time delay in the third parameter, and a deviation between the spatial angle in the second parameter and the spatial angle in the third parameter.

It should be noted that, in the case that the time delay of the target path and the spatial angle of the target path are both included in the second parameter and the third parameter, the second information is preferably used to indicate a deviation between the time delay in the second parameter and the time delay in the third parameter. That is, in this case, the deviation between the spatial angle in the second parameter and the spatial angle in the third parameter is not indicated; however, if desired, the deviation between the time delays and the deviation between the spatial angles may also be indicated simultaneously.

Therefore, the method for performing channel estimation on the uplink channel and determining the first parameter from the result of the channel estimation in step S201 may further include:

step S201-11, the network side equipment can estimate the uplink channel information through the channel sounding reference signal SRS to obtain a first uplink channel estimation result on the frequency domain;

step S201-12, the network side equipment performs Fourier transform on the first uplink channel estimation result to obtain a second uplink channel estimation result on a time domain;

step S201-13, the network side device determines the time delay of the target path and/or the space angle of the target path from the second uplink channel estimation result.

As can be seen from steps S201-11 to S201-13, a first uplink channel estimation result in the frequency domain needs to be obtained first, fourier transform is performed on the first uplink channel estimation result to obtain a second uplink channel estimation result in the time domain, and finally the time delay of the target path and/or the spatial angle of the target path is determined from the second uplink channel estimation result.

For the above steps S201-11 to S201-13, in a specific application scenario of the embodiment of the present application, an OFDM-based massive MIMO system is taken, where the second parameter and the third parameter both include a delay of a target path and/or a spatial angle of the target path, and the first parameter is a gain of the target path, and in the OFDM-based massive MIMO system, a transmitting end (network side device) has N antennas, and a receiving end (terminal) has 1 antenna. I.e. consider an N x 1 massive antenna system. The number of subcarriers of the OFDM frequency domain is N_C. Each 12 subcarriers constitute one RB (Resource Block), and a plurality of RBs constitute one subband. In an FDD broadband wireless communication system, both uplink and downlink are available, and occupy different frequency bands. It is assumed here that the center frequency of the uplink channel is f_UThe center frequency of the downlink channel is f_D. The following takes network side equipment as a base station for example;

in the embodiment of the application, the base station performs uplink channel estimation by using the SRS. The SRS is an uplink pilot signal sent by a terminal in a frequency domain; because the uplink channel is the pilot frequency transmitted by the terminal only provided with a small number of transmitting antennas, the pilot frequency overhead is relatively small. The base station has N receiving antennas for receiving the SRS, and each receiving antenna can perform channel estimation separately. For the ith antenna of the base station, the channel estimation value in the frequency domain in one OFDM symbol can be obtainedThe channel estimation values in the frequency domain of all antennas form a matrixFor the uplink channel, the task of channel estimation is already completed.

However, in order to support feedback in the downlink, acquisition needs to be based onAnd obtaining the part of information of which the uplink and downlink channels have partial reciprocity.Is an NxN_CThe matrix is a channel estimation value in the frequency domain.And channel estimation values of all antennas in time delay domainIs a pair of DFT (Discrete Fourier Transform) transforms. According to the model of spatial channel, the delay domain channel of multiple antennas can be expressed as:

wherein the content of the first and second substances,for the gain of the ith delay path, τ_lIs the delay of the ith delay path. Alpha is alpha_u(θ_l) And the space pilot vectors are the space pilot vectors of the uplink N receiving antennas. Can be expressed as:

wherein, theta_lIs the spatial angle of the l-th delay path, λ_UL＝c/f_UIs the wavelength of the carrier wave of the center frequency of the uplink channel, and d is the distance between the antennas.

Further uplink frequency domain channel H_ULCan be represented by the following calculation formula:

wherein the content of the first and second substances,is the Kronecker product of the matrix. F (tau)_l) Can be expressed as

F(τ)＝[1 e^j2πΔfτ…j2π(N-1)Δfτ]

According to H_ULExpression, channel in frequency domain using all antennas estimated based on SRSAll τ values can be obtained by DFT_l，θ_lAndthe value of (c). Wherein, for the downlink channel, the time delay tau_lAnd the spatial angle theta_lAnd time delay tau on the uplink channel_lAnd the spatial angle theta_lAre reciprocal. Only the gain of each delay path is identically distributed and independent of each other, i.e. τ_l，θ_lIs a parameter shared by uplink and downlink channels.

Optionally, before receiving the gain and the first information of the target path fed back by the terminal, the method of the embodiment of the present application may further include: and the network side equipment sends the channel state information reference signal CSI-RS to the terminal in a broadcasting mode. The CSI-RS is used for indicating the terminal to carry out channel estimation on a downlink channel.

Optionally, in this embodiment of the application, as to the manner of determining the channel information of the downlink channel according to the first information, the second information, and the second parameter in step S204, in a specific application scenario of this embodiment of the application, the following may be performed:

theta is obtained by the estimation of an uplink channel at the base station_lAnd τ_l(L1, 2, …, L), reusing terminal feedbackAnd delta tau, the base station can recover the downlink channel, thereby greatly reducing the feedback quantity; the downlink frequency domain channel acquisition can be determined by the following formula:

in order to further accurately acquire the gain of the target path in step S204, the following steps may be further performed:

step S204-11, the network side equipment inputs the first information into a target neural network to obtain fourth information; the target neural network is obtained by training an initial neural network through a preset training set, wherein the preset training set comprises first information obtained at a plurality of historical moments;

and step S204-12, the network side equipment determines the channel information of the downlink channel through the fourth information, the second information and the second parameter.

Therefore, in the embodiment of the application, in order to obtain more accurate gain of the target path, the network side device inputs the obtained gain of the target path to the trained target neural network, and further obtains the gain output by the target neural network.

It should be noted that, in a specific application scenario, the above is describedAndalso over time and the faster the speed of movement, the faster they change. Therefore, fed back at different timesAre relevant. Therefore, the base station can acquire the downlink channel more accurately by utilizing the correlation.

First, handleAndmodeling as random variables of Rayleigh distribution; in addition, the first and second substrates are,andalso over time and the faster the speed of movement, the faster they change. To be able to trackIn the embodiment of the present application, a neural network is used, and past feedback values are used to maximize the feedback valuesThe degree is restored to the current value.

Due to eachAre independent of each other so that they can be fed back and recovered independently. By oneFor example, if the current time is t and there is no feedback at the current time, thenCan pass through previous feedback valuesObtained, in order to obtain the current channel accurately at the base stationWe receive the feedback values of the previous K time instants from the base stationA neural network is input, here we use a fully connected 3-layer neural network. The activation function selects the RELU function. The output of the neural network being the current timeIs estimated value of

It should be noted that, in order to improve the performance of channel estimation, the neural network needs to be trained; wherein the training data is from feedback values of previous K timesThe goal of the training optimization (cost function) is the output of the neural networkAnd of actual channelsThe mean square error between them is minimal. Namely, it is

After training is completed, the trained neural network is used to improve channel acquisition. The base station inputs the feedback value to the trained neural network, and the output of the neural network is the current timeIs estimated value of

Finally, using neural network outputsAnd then delta tau fed back by the terminal and theta obtained by uplink channel estimation_lAnd τ_l(L ═ 1,2, …, L), the final high-precision acquisition of the downlink channel is as follows:

the following describes a channel information processing method according to an embodiment of the present application from a terminal side;

referring to fig. 3, fig. 3 is a second flowchart of a channel information processing method according to an embodiment of the present application, and as shown in fig. 3, the method includes the steps of:

step S302, first information and second information are sent to a network side device, wherein the first information includes a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating a deviation between a second parameter with reciprocity of uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

As can be seen, through the step S302, the terminal only needs to feed back channel parameters without reciprocity to the network side device, and does not need to feed back other parameters with reciprocity, thereby reducing feedback overhead.

Further, in step S302, there is a possibility that the parameter having the reciprocity between the uplink and downlink channels may be biased. In order to enable the network side device to more accurately acquire the channel information of the downlink channel, the network side device needs to send a parameter with reciprocity to the terminal, the terminal determines a corresponding parameter with reciprocity in the downlink channel estimation, and the terminal further sends the deviation with the reciprocity parameter to the network side device. Therefore, on the basis of the step S302, the method steps of the embodiment of the present application may further be:

optionally, in this embodiment of the present application, before sending the first information to the network side device, the method of this embodiment of the present application may further include:

step S301, channel estimation is performed on the downlink channel, and the first parameter and the third parameter are determined from the result of the channel estimation.

Based on the step S301, the method of the embodiment of the present application may further include:

step S304, receiving a second parameter sent by the network side equipment, wherein the second parameter is determined based on uplink channel estimation and has reciprocity of uplink and downlink channels;

step S306, sending second information to the network side device, where the second information is used to indicate a deviation between a second parameter and a third parameter, where the second parameter has reciprocity between an uplink channel and a downlink channel.

Therefore, the terminal feeds back the channel parameters without reciprocity and the deviation between the parameters with reciprocity to the network side equipment, so that the network side equipment can acquire more accurate channel information of the downlink channel.

Optionally, the method steps in the embodiment of the present application may further include: and sending third information to the network side equipment, wherein the third information comprises a fourth parameter corresponding to the first path, and the paths corresponding to the first path and the second path are different.

It can be seen that, in this embodiment of the present application, a path corresponding to a second parameter obtained by performing uplink channel estimation by a network side device is a different path from a fourth parameter obtained by performing downlink channel estimation by a terminal, that is, the network side device does not perform uplink channel estimation on the path corresponding to the fourth parameter. That is, for the second parameter and the third parameter of the same path, only the deviation thereof needs to be fed back, and for the channel parameters of different paths, the terminal needs to feed back to the network side device.

Optionally, in this embodiment of the present application, the second parameter may include a time delay of the target path and/or a spatial angle of the target path; and the second parameter in the embodiment of the present application may also include: the time delay of the target path and/or the spatial angle of the target path.

It should be noted that the target path may be a path in a multi-path delay channel or a path in a single-path delay channel. Further, whether the multipath delay channel or the single-path delay channel, the delay or the spatial angle of each path is the same, so the target path may be any path of the multipath delay channel or the single-path delay channel. In addition, the time delay of the target path and/or the spatial angle of the target path included in the second parameter and the third parameter are only preferred embodiments in the present application, and other channel parameters with reciprocity are also possible, that is, the channel parameters with reciprocity are all within the protection scope of the present application.

Based on this, since the second information in the embodiment of the present application is used to indicate the deviation between the second parameter and the third parameter with the reciprocity of the uplink and downlink channels, that is to say, specifically, it is: a deviation between the time delay in the second parameter and the time delay in the third parameter, or a deviation between the spatial angle in the second parameter and the spatial angle in the third parameter, or a deviation between the time delay in the second parameter and the time delay in the third parameter, and a deviation between the spatial angle in the second parameter and the spatial angle in the third parameter.

It should be noted that, in the case that the time delay of the target path and the spatial angle of the target path are both included in the second parameter and the third parameter, the second information is preferably used to indicate a deviation between the time delay in the second parameter and the time delay in the third parameter. I.e. in this case, no deviation between the spatial angle in the second parameter and the spatial angle in the third parameter is indicated. However, if desired, the deviation between the time delays and the deviation between the spatial angles may also be indicated simultaneously.

Optionally, in this embodiment of the present application, regarding the manner of performing channel estimation on the downlink channel and determining the first parameter and the third parameter from the result of the channel estimation in step S301, further may be:

s301-11, the terminal performs channel estimation on a downlink channel to obtain a first downlink channel estimation result on a frequency domain;

the channel estimation mode of the terminal for the downlink channel may specifically be: the terminal receives CSI-RS sent by network side equipment; and the terminal carries out channel estimation on the downlink channel based on the CSI-RS.

S301-12, the terminal performs two-dimensional Fourier transform on the first downlink channel estimation result to obtain a second downlink channel estimation result in a time domain;

and S301-13, the terminal determines the time delay of the target path and/or the space angle of the target path from the second downlink channel estimation result.

In a specific application scenario, taking the example that the second parameter and the third parameter both include the time delay of the target path and/or the spatial angle of the target path, and the first parameter is the gain of the target path, for the steps S301-11 to S301-13, it may be: the base station configures θ (Downlink Control Information) to the terminal through Downlink signaling, for example, RRC (Radio Resource Control), MAC-CE (Media Access Control layer) - (Control Element), DCI (Downlink Control Information), or the like_lAnd τ_lValue of (a), theta_lAnd τ_lIs obtained by uplink channel estimation. Meanwhile, the base station also sends the CSI-RS to enable the terminal to carry out downlink channel estimation, and the terminal estimates the downlink channel by utilizing the CSI-RSSimilar to the uplink channel H_ULObtaining the downlink frequency domain channel H_DLThe expression of (a) is as follows:

α_d(θ_l) And the space pilot vectors are the space pilot vectors of the uplink N receiving antennas. Can be expressed as:

wherein λ is_DL＝c/f_DIs the wavelength of the carrier wave of the center frequency of the downlink channel.

Downlink channel estimation in frequency domain based on all antennasThe corresponding time delay expansion tau 'of the downlink channel can be obtained by utilizing DFT'_lAnd space angle of θ'_lAndthe value of (c). Wherein τ'_l，θ′_lTau to be configured with downlink signaling of base station_l，θ_lIs reciprocal, i.e. the synchronization of the uplink and downlink channels will deviate somewhat, so τ_l' and τ of uplink channel configuration_lThere will be some deviation. Contrast of θ'_lAnd theta_lThe value of this deviation is then used. Wherein, for the delay deviations of different paths, the terminal can report the delay deviation of each path respectively, taking the L entry labeled path as an example, the terminal takes the delay deviation (τ ') of the L-th path in the L entry labeled path'_l-τ_l) And respectively reporting to the network side equipment. Alternatively, for delay variations of different paths, the terminal may report a delay variation, in which case all τ may be reported_l(L ═ 1,2, …, L), this deviation is the same. Definition of

Finally the terminal will(L ═ 1,2, …, L) and Δ τ are fed back to the base station. It can be seen that channel feedback is not required to be performed on each sub-band, but all required information is fed back at one time, and channel information on all sub-carriers can be calculated based on the information, thereby greatly reducing feedback overhead.

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

Referring to fig. 4, fig. 4 is a schematic structural diagram of a first apparatus for processing channel information according to an embodiment of the present application, where the apparatus is applied to a network side device, and the apparatus includes:

a first receiving module 42, configured to receive the first information and the second information from the terminal; the first information comprises a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used for indicating deviation between a second parameter with reciprocity of the uplink and downlink channels and a third parameter, the second parameter is determined based on the uplink channel estimation, and the third parameter is determined based on the downlink channel estimation;

the first determining module 44 is configured to determine channel information of the downlink channel according to the first information, the second information, and the second parameter.

Optionally, the apparatus in this embodiment of the present application may further include: a first processing module, configured to perform channel estimation on an uplink channel before receiving the first information and the second information from the terminal, and determine a second parameter from a result of the channel estimation; and the first sending module is used for sending the second parameters to the terminal.

Optionally, the apparatus in this embodiment of the present application may further include: and the second receiving module is used for receiving third information from the terminal, wherein the third information comprises a fourth parameter corresponding to the first path, and the paths corresponding to the first path and the second path are different.

Optionally, the first determining module in this embodiment is further configured to determine channel information of the downlink channel according to the first information, the second information, the third information, and the second parameter.

Optionally, the second parameter and the third parameter in this embodiment of the application each include a time delay of the target path and/or a spatial angle of the target path.

Wherein the target path is at least one of: a path instructed by the network-side device, a path having a deviation, and a path measured by the terminal.

Further, in a case where the time delay of the target path and the spatial angle of the target path are included in both the second parameter and the third parameter, the second information is used to indicate a deviation between the time delay in the second parameter and the time delay in the third parameter.

Optionally, the first processing module in this embodiment of the application may further include: the first processing unit is used for estimating uplink channel information to obtain a first uplink channel estimation result on a frequency domain; the second processing unit is used for carrying out Fourier transform on the first uplink channel estimation result to obtain a second uplink channel estimation result on a time domain; and the third processing unit is used for determining the time delay of the target path and/or the space angle of the target path from the second uplink channel estimation result.

Optionally, the first determining module in this embodiment of the application may further include: the first input unit is used for inputting the first information into the target neural network to obtain fourth information; and a first determining unit, configured to determine channel information of the downlink channel according to the fourth information, the second information, and the second parameter.

Optionally, the target neural network in the embodiment of the present application is obtained by training the initial neural network through a preset training set; the preset training set comprises first information obtained at a plurality of historical moments.

Optionally, the first parameter included in the first information in the embodiment of the present application is a gain on the target path.

Through the apparatus in the embodiment of fig. 4, after the uplink channel estimation is performed, the second parameter may be determined by using a channel estimation result of the uplink channel estimation, and in combination with that the terminal feeds back, to the network side device, a deviation of a channel parameter having reciprocity between an uplink channel and a downlink channel and a channel parameter having no reciprocity between an uplink channel and a downlink channel, channel information of a downlink channel may be obtained without feeding back other channel parameters, thereby reducing channel feedback overhead.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a second apparatus for processing channel information in an embodiment of the present application, where the apparatus is applied to a terminal, and as shown in fig. 5, the apparatus includes:

a second sending module 52, configured to send first information and second information to a network side device, where the first information includes a first parameter without reciprocity of uplink and downlink channels, the first parameter is determined based on downlink channel estimation, the second information is used to indicate a deviation between a second parameter with reciprocity of uplink and downlink channels and a third parameter, the second parameter is determined based on uplink channel estimation, and the third parameter is determined based on downlink channel estimation.

Optionally, the apparatus in this embodiment of the present application may further include: and the second processing module is used for performing channel estimation on the downlink channel before the first information and the second information are sent to the network side equipment, and determining the first parameter and the third parameter from a channel estimation result.

Optionally, the apparatus in this embodiment of the present application may further include: and the third receiving module is used for receiving the second parameter sent by the network side equipment.

Optionally, the apparatus in this embodiment of the present application may further include: and the third sending module is used for sending third information to the network side equipment, wherein the third information comprises a fourth parameter corresponding to the first path, and the paths corresponding to the first path and the second path are different.

Optionally, the second parameter and the third parameter in this embodiment of the application each include a time delay of the target path and/or a spatial angle of the target path.

And under the condition that the second parameter and the third parameter both comprise the time delay of the target path and the space angle of the target path, the second information is used for indicating the deviation between the time delay in the second parameter and the time delay in the third parameter.

Optionally, the second processing module in this embodiment of the application may further include: the fourth processing unit is configured to perform channel estimation on the downlink channel to obtain a first downlink channel estimation result in the frequency domain; the fifth processing unit is used for performing two-dimensional Fourier transform on the first downlink channel estimation result to obtain a second downlink channel estimation result in a time domain; and the sixth processing unit is configured to determine the time delay of the target path and/or the spatial angle of the target path from the second downlink channel estimation result.

With the apparatus in the embodiment of fig. 5, after channel estimation is performed, only the deviation of the channel parameters with the reciprocity between the uplink and downlink channels and the channel parameters without the reciprocity between the uplink and downlink need to be fed back to the network side device, and no other channel parameters need to be fed back, thereby reducing the feedback overhead.

In the embodiment of the present application, the processing device applied to the channel information in fig. 5 may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The processing device of the channel information in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an IOS operating system, or other possible operating systems, which is not specifically limited in the embodiments of the present application.

The channel information processing apparatus provided in this embodiment of the present application can implement each process implemented in the method embodiment of fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, as shown in fig. 6, an embodiment of the present application further provides a communication device 600, which includes a processor 601, a memory 602, and a program or an instruction stored on the memory 602 and executable on the processor 601, for example, when the communication device 600 is a terminal, the program or the instruction is executed by the processor 601 to implement the processes of the embodiment of the processing method of channel information in fig. 3, and the same technical effect can be achieved. When the communication device 600 is a network-side device, the program or the instruction is executed by the processor 601 to implement the processes of the embodiment of the channel information processing method in fig. 2, and the same technical effect can be achieved.

Fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

The terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power supply (e.g., a battery) for supplying power to various components, which may be logically connected to the processor 710 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and will not be described again here.

It should be understood that in the embodiment of the present application, the input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics Processing Unit 7041 processes image data of still pictures or videos obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts of a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 701 receives downlink data from a network side device and then processes the downlink data in the processor 710; in addition, the uplink data is sent to the base station network side equipment. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions as well as various data. The memory 709 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. In addition, the Memory 709 may include a high-speed random access Memory and a nonvolatile Memory, where the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 710 may include one or more processing units; alternatively, processor 710 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, etc. and a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The radio frequency unit 701 is configured to receive a first parameter sent by a network side device; wherein, the first parameter is determined from the channel estimation result after the network side equipment carries out channel estimation on the uplink channel,

a processor 710, configured to perform channel estimation on a downlink channel, and determine a second parameter and a first gain of each path in a multipath delay channel from a result of the channel estimation;

the radio frequency unit 701 is further configured to send the offset parameter and the first gain of each path in the multipath time delay channel to a network side device; wherein the deviation parameter is used to indicate a deviation between the first parameter and the second parameter.

Optionally, the processor 710 is further configured to estimate uplink channel information through a channel sounding reference signal SRS, to obtain a first uplink channel estimation result in a frequency domain; performing Fourier transform on the first uplink channel estimation result to obtain a second uplink channel estimation result on a time domain; and determining the time delay of each path and/or the space angle of each path in the multi-path time delay channel from the second uplink channel estimation result.

Specifically, the embodiment of the application further provides a network side device. As shown in fig. 8, the network-side device 800 includes: antenna 81, radio frequency device 82, baseband device 83. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the rf device 82 receives information via the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be transmitted and transmits the information to the rf device 82, and the rf device 82 processes the received information and transmits the processed information through the antenna 81.

The above band processing means may be located in the baseband device 83, and the method performed by the network side device in the above embodiment may be implemented in the baseband device 83, where the baseband device 83 includes a processor 84 and a memory 85.

The baseband device 83 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 8, where one of the chips, for example, the processor 84, is connected to the memory 85 to call up the program in the memory 85 to perform the network side device operation shown in the above method embodiment.

The baseband device 83 may further include a network interface 86 for exchanging information with the radio frequency device 82, such as a Common Public Radio Interface (CPRI).

Specifically, the network side device of the embodiment of the present invention further includes: the instructions or programs stored in the memory y5 and capable of being executed on the processor 84, the processor 84 calls the instructions or programs in the memory 85 to execute the method executed by each module shown in fig. 4, and achieve the same technical effect, and therefore, in order to avoid repetition, the description is omitted here.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the embodiment of the channel information processing method in fig. 2 and fig. 3, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

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

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

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network-side device) to execute the method according to the embodiments of the present application.

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