CN117318773A

CN117318773A - Channel matrix processing method, device, terminal and network side equipment

Info

Publication number: CN117318773A
Application number: CN202210716333.9A
Authority: CN
Inventors: 任千尧
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2023-12-29

Abstract

The application discloses a channel matrix processing method, a device, a terminal and network side equipment, which belong to the technical field of communication, and the channel matrix processing method in the embodiment of the application comprises the following steps: the terminal determines N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the space domain information of the antenna of the transmitting end, the second orthogonal bases correspond to the space domain information of the antenna of the receiving end, and N and M are positive integers; the terminal acquires a channel matrix estimated by each sub-band and acquires projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases; and the terminal reports the projection coefficient of each sub-band to network side equipment.

Description

Channel matrix processing method, device, terminal and network side equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a channel matrix processing method, a device, a terminal and network side equipment.

Background

In the existing communication system, a base station transmits channel state information reference signals (Channel State Information Reference Signal, CSI-RS) on certain time-frequency resources of a certain time slot, a terminal carries out channel estimation according to the CSI-RS, channel information on the time slot is calculated, precoding matrix indication (Precoding Matrix Indicator, PMI) is fed back to the base station through a codebook, the base station combines the channel information according to the codebook information fed back by the terminal, and the base station carries out data precoding and multi-user scheduling according to the data precoding before the next CSI report.

At present, the codebook content fed back by the terminal is a characteristic matrix of a channel matrix, namely, only a precoding matrix of a transmitting end is fed back, but in some scenes (such as a high-speed scene), a base station only predicts channel information based on the precoding matrix of the transmitting end, so that the accuracy of channel information prediction is lower.

Disclosure of Invention

The embodiment of the application provides a channel matrix processing method, a device, a terminal and network side equipment, which can solve the problem that the accuracy of channel information prediction by the network side equipment in the related technology is low.

In a first aspect, a channel matrix processing method is provided, including:

the terminal determines N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the space domain information of the antenna of the transmitting end, the second orthogonal bases correspond to the space domain information of the antenna of the receiving end, and N and M are positive integers;

the terminal acquires a channel matrix estimated by each sub-band and acquires projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases;

and the terminal reports the projection coefficient of each sub-band to network side equipment.

In a second aspect, a channel matrix processing method is provided, including:

The network side equipment receives the projection coefficient reported by the terminal;

the network side equipment recovers a channel matrix according to the projection coefficient;

the projection coefficients are obtained by projecting channel matrixes estimated by each sub-band on N first orthogonal bases and M second orthogonal bases by the terminal, wherein the first orthogonal bases correspond to the airspace information of the antenna of the transmitting end, the second orthogonal bases correspond to the airspace information of the antenna of the receiving end, and N and M are positive integers.

In a third aspect, there is provided a channel matrix processing apparatus, comprising:

the determining module is used for determining N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the space domain information of the transmitting end antenna, the second orthogonal bases correspond to the space domain information of the receiving end antenna, and N and M are positive integers;

the acquisition module is used for acquiring the estimated channel matrix of each sub-band and acquiring the projection coefficients of the estimated channel matrix of each sub-band on the N first orthogonal bases and the M second orthogonal bases;

and the reporting module is used for reporting the projection coefficient of each sub-band to the network side equipment.

In a fourth aspect, there is provided a channel matrix processing apparatus, including:

The receiving module is used for receiving the projection coefficient reported by the terminal;

the recovery module is used for recovering the channel matrix according to the projection coefficient;

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the channel matrix processing method according to the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to determine N first orthogonal bases and M second orthogonal bases, where the first orthogonal bases correspond to spatial information of a transmitting end antenna, the second orthogonal bases correspond to spatial information of a receiving end antenna, and N and M are both positive integers; the method comprises the steps of obtaining a channel matrix estimated by each sub-band, and obtaining projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases;

The communication interface is used for reporting the projection coefficient of each sub-band to network side equipment.

In a seventh aspect, a network side device is provided, which comprises a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the channel matrix processing method according to the second aspect.

An eighth aspect provides a network side device, including a processor and a communication interface, where the communication interface is configured to receive a projection coefficient reported by a terminal; the processor is used for recovering the channel matrix according to the projection coefficient;

In a ninth aspect, there is provided a communication system comprising: a terminal and a network side device, the terminal being operable to perform the steps of the channel matrix processing method as described in the first aspect, the network side device being operable to perform the steps of the channel matrix processing method as described in the second aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, implement the steps of the channel matrix processing method as described in the first aspect, or implement the steps of the channel matrix processing method as described in the second aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being configured to execute a program or instructions to implement the channel matrix processing method according to the first aspect or to implement the channel matrix processing method according to the second aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executable by at least one processor to implement a channel matrix processing method as described in the first aspect or to implement a channel matrix processing method as described in the second aspect.

In the embodiment of the application, the terminal calculates the projection coefficients of the estimated channel matrix of each sub-band on N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the airspace information of the antenna of the transmitting end, the second orthogonal bases correspond to the airspace information of the antenna of the receiving end, the receiving end and the transmitting end are considered at the same time in the calculation of the projection coefficients, and the network side equipment performs channel matrix recovery according to the projection coefficients of each sub-band reported by the terminal, so that the full channel matrix information of the receiving end and the transmitting end can be obtained. Therefore, the network side equipment can obtain the channel matrix information of the transmitting end and the channel matrix information of the receiving end, and is more beneficial to predicting the channel information, so that the accuracy of channel information prediction is improved.

Drawings

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

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

fig. 3 is a flowchart of another channel matrix processing method provided in an embodiment of the present application;

fig. 4 is a block diagram of a channel matrix processing apparatus according to an embodiment of the present application;

fig. 5 is a block diagram of another channel matrix processing apparatus according to an embodiment of the present application;

fig. 6 is a block diagram of a communication device according to an embodiment of the present application;

fig. 7 is a block diagram of a terminal according to an embodiment of the present application;

fig. 8 is a block diagram of a network side device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

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 device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

In order to better understand the technical solutions provided by the embodiments of the present application, the following explains related concepts and principles that may be related in the embodiments of the present application.

From the theory of information, accurate channel state information (Channel State Information, CSI) is critical to channel capacity. Especially for multi-antenna systems, the transmitting end can optimize the transmission of the signal according to the CSI so that it more matches the state of the channel. For example: channel quality indication (Channel Quality Indicator, CQI) may be used to select an appropriate modulation coding scheme (Modulation and Coding Scheme, MCS) for link adaptation; the precoding matrix indicator (Precoding Matrix Indicator, PMI) may be used to implement eigen-beamforming (eigen beamforming) to maximize the strength of the received signal or to suppress interference (e.g., inter-cell interference, inter-user interference, etc.). Thus, CSI acquisition has been a research hotspot since multi-antenna technology (MIMO) was proposed.

In general, a base station transmits a channel state information reference signal (Channel State Information Reference Signal, CSI-RS) on some time-frequency resources of a slot, a terminal performs channel estimation according to the CSI-RS, calculates channel information on the slot (slot), feeds back a PMI to the base station through a codebook, and combines the channel information according to codebook information fed back by the terminal, so that the base station performs data precoding and multi-user scheduling before the next CSI report.

In order to further reduce CSI feedback overhead, the terminal may change reporting PMI of each subband into reporting PMI according to delay (delay), and since channels in delay domain are more concentrated, PMI of all subbands can be approximately represented by fewer delay PMIs, i.e. reporting after compressing delay domain information.

In order to reduce the cost, the base station may pre-encode the CSI-RS in advance, send the encoded CSI-RS to the terminal, the terminal sees the channel corresponding to the encoded CSI-RS, and the terminal only needs to select a plurality of ports with higher intensity from ports indicated by the network side, and report coefficients corresponding to the ports.

When estimating the channel, the terminal obtains an estimated channel matrix, for example, a 4×32 channel matrix, representing 4 receiving antennas and 32 CSI-RS ports, on each sub-band, where the channel matrices on each sub-band are different, and the two self-band channel matrices may have great difference due to frequency selective fading, so that the conventional R15 codebook feeds back the channel information of each sub-band respectively.

However, a certain relation exists among a plurality of continuous self-contained channel matrixes, the traditional R16 codebook is to convert a frequency domain channel into a time delay domain by utilizing the relation, so that the channel matrixes with concentrated energy are obtained, and more complete channel information can be obtained by only reporting the channel information corresponding to part of time delay with strong energy.

The codebook-based CSI feedback scheme is mostly used for feeding back a channel precoding matrix, namely a characteristic matrix of the channel matrix, and is mainly used for saving expenditure, and the reported CSI is mainly used for precoding use by a base station, so that complete channel information is not needed, only characteristic information of a transmitting end of a channel is needed, and therefore, only the characteristic matrix of the channel is reported, the expenditure can be reduced, and the performance is not influenced. However, with the increasing popularity of high-speed scenarios, the base station needs to predict channel information at a certain time in the future in order to better schedule users, so the base station needs complete channel information.

The channel matrix processing method provided by the embodiment of the application is described in detail below by means of some embodiments and application scenarios thereof with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of a channel matrix processing method according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:

step 201, the terminal determines N first orthogonal bases and M second orthogonal bases, where the first orthogonal bases correspond to spatial information of the transmitting end antenna, and the second orthogonal bases correspond to spatial information of the receiving end antenna.

Wherein N and M are positive integers.

It should be noted that, in some communication scenarios, the transmitting end may refer to a network side device (also referred to as a base station), and the receiving end may refer to a terminal; alternatively, in other communication scenarios, the transmitting end may refer to a terminal, and the receiving end may refer to a network-side device.

Optionally, the terminal may select from the candidate orthogonal bases to determine N first orthogonal bases and M second orthogonal bases, where the N first orthogonal bases correspond to spatial information of the transmitting antenna and the M second orthogonal bases correspond to spatial information of the receiving antenna. The candidate orthogonal base may be obtained by referring to a related technology, which is not described herein.

It is to be noted that the above-described first orthogonal base and second orthogonal base are merely categories for distinguishing the orthogonal bases, and thus terms used may be interchanged as appropriate. For example, the terminal selects among candidate orthogonal bases, a certain candidate orthogonal base currently being determined as a first orthogonal base, which may also be determined as a second orthogonal base in other scenarios. In addition, the first orthogonal base corresponds to the spatial information of the transmitting antenna, the second orthogonal base corresponds to the spatial information of the receiving antenna, and is only used for the difference in expression, and the first orthogonal base and the second orthogonal base are not limited.

Step 202, the terminal obtains a channel matrix estimated by each sub-band, and obtains projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases.

In this embodiment, the terminal estimates a channel matrix in each subband, projects the estimated channel matrix of each subband on the N first orthogonal bases and the M second orthogonal bases, obtains a projected channel matrix, and calculates projection coefficients of the channel matrix projected on the N first orthogonal bases and the M second orthogonal bases.

Alternatively, the N first orthogonal bases and the M second orthogonal bases may be combined into n×m orthogonal base pairs, and each orthogonal base pair and the channel matrix of each subband calculate a coefficient, so that n×m projection coefficients are calculated.

For example, the channel covariance matrix of the subband is calculated first, then the projection coefficient of the corresponding covariance matrix at each orthogonal basis is calculated, and for the kth orthogonal basis, the projection coefficient is v _k The specific formula is as follows:

wherein Cov represents covariance matrix, b _k Represents the kth orthogonal basis and,representing the conjugate transpose of the kth orthogonal basis.

The covariance matrix is calculated by the following formula for the first orthogonal basis:

wherein Cov is _c Covariance matrix representing first orthogonal angle, N _SB Represents the number of subbands, H represents the channel matrix, H ^H Representing the conjugate transpose of the channel matrix H.

For the second orthogonal basis, the covariance matrix is calculated as follows:

wherein Cov is _r Covariance matrix representing second orthogonal basis, N _SB Represents the number of subbands, H represents the channel matrix, H ^H Representing the conjugate transpose of the channel matrix H.

Based on the above formula, the covariance matrix can be calculated, then the projection coefficients of the covariance matrix on each orthogonal basis are calculated, and n×m projection coefficients are calculated altogether.

Alternatively, assuming that the receiving end has 4 antennas, it may also be that the channel matrix is first calculated with M second orthogonal bases to obtain 4×m projection coefficients, and then n×m projection coefficients are calculated with N first orthogonal bases and the 4×m projection coefficients, that is, N projection coefficients can be calculated for every 4, and then n×m projection coefficients are obtained.

Step 203, the terminal reports the projection coefficient of each sub-band to a network side device.

The terminal calculates the projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases, that is, each sub-band calculates n×m projection coefficients, and then the terminal reports the n×m projection coefficients calculated on each sub-band to the network side device.

In the embodiment of the application, the terminal calculates the projection coefficients of the estimated channel matrix of each sub-band on N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the airspace information of the antenna of the transmitting end, the second orthogonal bases correspond to the airspace information of the antenna of the receiving end, the receiving end and the transmitting end are considered at the same time in the calculation of the projection coefficients, and the network side equipment performs channel matrix recovery according to the projection coefficients of each sub-band reported by the terminal, so that the full channel information of the receiving end and the transmitting end can be obtained. Therefore, the network side equipment can obtain the channel information of the transmitting end and the channel information of the receiving end, and is more beneficial to predicting the channel information so as to improve the accuracy of channel information prediction.

For example, in a high-speed scenario, the network side device can more accurately predict channel information at a certain moment in the future based on the channel information of the receiving end and the channel information of the transmitting end, so as to better schedule the terminal.

In this embodiment of the present application, in the case where the projection coefficients of the channel matrix estimated by each subband on the N first orthogonal bases and the M second orthogonal bases are calculated, the first orthogonal base and/or the second orthogonal base corresponding to each subband may be the same or different.

Optionally, the target orthogonal base is assumed to include the first orthogonal base and/or the second orthogonal base, and the target orthogonal base satisfies any one of the following:

the target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis for each subband is different.

For example, the target orthogonal basis is the first orthogonal basis, and the first orthogonal basis corresponding to the subband 1 and the first orthogonal basis corresponding to the subband 2 may be the same, that is, the terminal projects the channel matrix estimated by the subband 1 on N first orthogonal bases, and projects the channel matrix estimated by the subband 2 on the same N first orthogonal bases. Alternatively, the first orthogonal bases corresponding to the subband 1 and the first orthogonal bases corresponding to the subband 2 are different, for example, the terminal projects the channel matrix estimated by the subband 1 on N first orthogonal bases, and projects the channel matrix estimated by the subband 2 on another N first orthogonal bases.

As another example, the target orthogonal basis is the first orthogonal basis and the second orthogonal basis, and the first orthogonal basis corresponding to the subband 1 and the first orthogonal basis corresponding to the subband 2 may be the same, and the second orthogonal basis corresponding to the subband 1 and the second orthogonal basis corresponding to the subband 2 may be the same or may be different.

It will be appreciated that the first orthogonal base and/or the second orthogonal base corresponding to the sub-bands may be the same or different, and other possible cases are not specifically mentioned herein. It should be noted that the target orthogonal bases corresponding to the subbands may be all different or partially different.

Optionally, in a case that the target orthogonal basis corresponding to each subband is different, the method further includes:

the terminal indicates the target orthogonal base corresponding to each sub-band to network side equipment.

It is understood that the target orthogonal basis may be comprised of a first orthogonal basis and/or a second orthogonal basis. For example, taking the target orthogonal base as the first orthogonal base, if the first orthogonal base corresponding to each sub-band is different, the terminal may report an index of the first orthogonal base corresponding to each sub-band to the network side device, and instruct the first orthogonal base selected by each sub-band based on the index, so that the network side device can learn the first orthogonal base selected by the terminal in each sub-band based on the index of the first orthogonal base, so that the network side device accurately recovers the channel information.

Optionally, in a case where the target orthogonal base includes the first orthogonal base and the second orthogonal base, and the target orthogonal base corresponding to each sub-band is different, the determining by the terminal N first orthogonal bases and M second orthogonal bases includes:

The terminal determines a first candidate orthogonal base and a second candidate orthogonal base, and respectively carries out oversampling treatment on the first candidate orthogonal base and the second candidate orthogonal base to obtain n groups of first candidate orthogonal bases and m groups of second candidate orthogonal bases, wherein n and m are positive integers;

the terminal selects from j groups of first candidate orthogonal bases to obtain N first orthogonal bases, and selects from k groups of second candidate orthogonal bases to obtain M second orthogonal bases;

wherein the j sets of first candidate orthogonal bases are any one of the n sets of first candidate orthogonal bases, and the k sets of second candidate orthogonal bases are any one of the m sets of second candidate orthogonal bases, i.e., j=1, k=1.

In this embodiment of the present application, the terminal may first acquire the first candidate orthogonal base and the second candidate orthogonal base, for example, may determine 32 first candidate orthogonal bases and 32 second candidate orthogonal bases, and perform an oversampling process on the 32 first candidate orthogonal bases and the 32 second candidate orthogonal bases, for example, obtain 4 sets of 32 first candidate orthogonal bases and 4 sets of 32 second candidate orthogonal bases, that is, 4×32 first candidate orthogonal bases and 4×32 second candidate orthogonal bases (that is, n=4, m=4); further, the terminal may select one group from each, select N first orthogonal groups from 32 first candidate orthogonal groups corresponding to one group (i.e., j groups), and select M second orthogonal groups from 32 second candidate orthogonal groups corresponding to one group (i.e., k groups).

In this way, the terminal can perform over-sampling processing on the candidate orthogonal base, and select a group from the over-sampling groups obtained by the over-sampling processing to perform selection of the first orthogonal base and the second orthogonal base, so as to improve the richness and the selection range of the selection of the orthogonal base. The oversampling process of the orthogonal base may refer to the related art, and this embodiment is not described in detail.

Optionally, the method further comprises:

the terminal reports at least one of the following to the network side equipment:

the index of the j group;

an index of the k groups;

indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

After the terminal performs the oversampling process on the candidate orthogonal bases (including the first candidate orthogonal base and the second candidate orthogonal base) to obtain n groups of first candidate orthogonal bases and m groups of second candidate orthogonal bases, each group may have a corresponding index to identify which group is. In addition, for each of the selected N first orthogonal bases and M second orthogonal bases, each of the orthogonal bases also includes a corresponding index to identify which of the orthogonal bases is specifically.

In this embodiment of the present application, after selecting, by a terminal, j groups of first candidate orthogonal bases from N groups of first candidate orthogonal bases to determine N first orthogonal bases from the N first candidate orthogonal bases, the index of the j groups may be reported to a network side device; optionally, the indexes corresponding to the N first orthogonal bases may be reported to the network side device. Similarly, after the terminal selects k groups of second candidate orthogonal bases from M groups of second candidate orthogonal bases to determine M second orthogonal bases therefrom, the terminal may report the M groups of indexes to the network side device; optionally, indexes corresponding to the M second orthogonal bases may be reported to the network device. Furthermore, the network side equipment can accurately acquire the candidate orthogonal base group and/or the selected orthogonal base selected by the terminal.

It should be noted that, when the N first orthogonal bases and/or the M second orthogonal bases corresponding to each subband are the same, the terminal may not need to report indexes corresponding to the N first orthogonal bases and/or the M second orthogonal bases corresponding to each subband.

Optionally, the indexes of the j groups corresponding to each sub-band are the same, and the indexes of the k groups corresponding to each sub-band are the same or different; or the indexes of the j groups corresponding to each sub-band are different, and the indexes of the k groups corresponding to each sub-band are the same or different.

That is, the first candidate orthogonal base group corresponding to each subband may be the same or different. For example, assuming n is 4, i.e., there are 4 sets of first candidate orthogonal bases, subband 1 may correspond to a first set of first candidate orthogonal bases therein, subband 2 may correspond to a first set of first candidate orthogonal bases therein, or subband 2 may correspond to a second set of first candidate orthogonal bases therein.

Alternatively, the second candidate orthogonal base group corresponding to each subband may be the same or different. Assuming that m is 4, i.e., there are 4 sets of second candidate orthogonal bases, subband 1 may correspond to a second set of second candidate orthogonal bases therein, subband 2 may correspond to a second set of second candidate orthogonal bases therein, or subband 2 may correspond to a third set of second candidate orthogonal bases therein.

In addition, as described above, the N first orthogonal bases corresponding to each subband may be the same or different, and the M second orthogonal bases corresponding to each subband may be the same or different. For example, both subband 1 and subband 2 correspond to a first set of first candidate orthogonal bases, but the N first orthogonal bases corresponding to subband 1 are different from the N first orthogonal bases corresponding to subband 2. For another example, subband 1 corresponds to a first set of first candidate orthogonal bases and subband 2 corresponds to a second set of first candidate orthogonal bases, but the N first orthogonal bases corresponding to subband 1 and subband 2 are the same. Of course, the above description is only given by taking the first candidate orthogonal base group and the first orthogonal base group corresponding to each subband as an example, and the second candidate orthogonal base group and the second orthogonal base group corresponding to each subband may also be various possible cases, which are not specifically described in this embodiment.

Optionally, before the terminal determines the N first orthogonal bases and the M second orthogonal bases, the method further includes:

the terminal reports the maximum port number of the receiving end antenna to network side equipment; wherein M is less than or equal to the maximum number of ports.

When the terminal performs the capability report, the terminal reports the maximum number of the second orthogonal bases that can be supported, that is, the maximum port number, to the network side device, and further, the number of the second orthogonal bases is smaller than or equal to the maximum port number. Therefore, the network side equipment can obtain the maximum number of the second orthogonal base through the maximum reported port number, and the recovery of the network side equipment to the channel information is facilitated.

In this embodiment of the present application, before the terminal determines M second orthogonal bases, the method further includes any one of the following:

the terminal receives first indication information sent by network side equipment and determines the value of M based on the first indication information, wherein the first indication information is used for indicating the value of M;

and the terminal automatically determines the value of M.

For example, in one embodiment, the network side device indicates the number of second orthogonal bases to the terminal, that is, indicates the value of M, and the terminal determines M based on the indication of the network side device. Optionally, the value of M cannot be greater than the reporting capability of the terminal, that is, cannot be greater than the maximum port number of the receiving end.

Alternatively, in another embodiment, the terminal may also determine the number of the second orthogonal groups by itself, that is, automatically determine the value of M, so that the terminal has more autonomy in selecting the number of the second orthogonal groups. In this way, the M corresponding to each subband may be different, i.e., the number of second orthogonal bases corresponding to each subband may be different.

Optionally, in the case that the terminal determines the value of M by itself, the method further includes:

And the terminal reports the value of M to network side equipment.

Optionally, in the case that the terminal receives the first indication information sent by the network side device and determines the value of M based on the first indication information, the method further includes any one of the following:

the terminal maps the antenna into M receiving ports;

the terminal determines L receiving ports and indicates the L receiving ports to the network side equipment, wherein L is less than M.

In an exemplary embodiment, when the network side device indicates the value of M to the terminal based on the first indication information, the terminal may map the antenna to M receiving ports by itself. For example, if the actual number of antenna ports of the terminal is 4 and m is 2, the terminal may map the antennas to 2 receiving ports, but the terminal may still receive and transmit data through the 4 antenna ports in the actual data transceiving process. In this case, the terminal does not need to report the index of the first orthogonal base and the index of the second orthogonal base to the network side device, and the terminal may report only the index of the oversampling group, that is, the selected index of the j group and/or the index of the k group.

Or, when the network side device indicates the value of M to the terminal based on the first indication information, the terminal may select L receiving ports, where L is smaller than M, that is, the terminal selects the number of ports smaller than M indicated by the network side device, and reports the selected L receiving ports to the network side device through the indication information. Furthermore, the network side device can also know the number of the receiving ports actually selected by the terminal.

Optionally, when the terminal receives the first indication information sent by the network side device and determines the value of M based on the first indication information, the terminal determines M second orthogonal bases, including:

the terminal generates a corresponding number of orthogonal bases based on the maximum port number of the receiving end, and determines M second orthogonal bases from the generated corresponding number of orthogonal bases.

In this embodiment of the present application, when the network side device indicates, to the terminal, the value of M based on the first indication information, the terminal may generate a corresponding number of orthogonal bases based on the maximum port number of the receiving terminal, and select, based on the indication of the network side device, M second orthogonal bases from the generated corresponding number of orthogonal bases. For example, the terminal is a receiving end, the terminal has 4 antennas, that is, the maximum port number is 4, at most 4 orthogonal bases can be constructed, the dimension of each orthogonal base is 4, the value of M indicated by the network side device is smaller than 4, and the terminal selects M from the 4 orthogonal bases to report based on the indication of the network side device. Alternatively, the terminal may also perform oversampling on the 4 orthogonal bases to obtain 16 orthogonal bases, and the terminal selects and reports M orthogonal bases with the same oversampling index.

Optionally, in the case that the terminal determines the M second orthogonal bases through oversampling, and the value of M is equal to the corresponding number, the method further includes:

and the terminal reports indexes of the oversampling groups corresponding to the M second orthogonal bases to network side equipment.

In an exemplary embodiment, the network side device indicates the value of M, and the terminal generates a corresponding number of orthogonal bases based on the maximum port number of the receiving end, if the value of M is the same as the generated corresponding number, that is, the terminal does not need to select from the generated orthogonal bases, but directly determines all the generated corresponding number of orthogonal bases as the second orthogonal bases, that is, M second orthogonal bases. In this case, the terminal does not need to report the indexes of the M second orthogonal bases, and if the M second orthogonal bases are the orthogonal bases determined by the terminal after the oversampling process, the terminal reports the indexes of the oversampling groups corresponding to the M second orthogonal bases to the network side device, that is, the indexes of the k groups mentioned in the above embodiment. Alternatively, the terminal may not report the index of the k groups, or report the indexes of the M second orthogonal bases.

In this embodiment of the present application, in the case where the network side device indicates the value of M to the terminal, the terminal may map the antenna to M receiving ports by itself based on the indication of the network side device, or may determine each L receiving ports smaller than M by itself, or may generate a corresponding number of orthogonal bases based on the maximum number of ports of the receiving ports, and select M second orthogonal bases from them. Therefore, the determination mode of the terminal for the orthogonal base and the determination mode of the number of the receiving ports are more flexible and diversified.

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

the terminal determining n×m orthogonal base pairs based on the N first orthogonal bases and the M second orthogonal bases;

and the terminal reports W non-zero values of the N multiplied by M orthogonal base pairs to network side equipment, wherein W is a positive integer.

In the embodiment of the application, after determining N first orthogonal bases and M second orthogonal bases, the terminal can form n×m orthogonal base pairs, and the terminal reports W non-zero values in the n×m orthogonal base pairs, where W is less than or equal to (n×m).

The non-zero value is a value with a value other than zero, the n×m orthogonal base pairs are corresponding to the n×m projection coefficients, the terminal reports the non-zero values of the n×m orthogonal base pairs to the network side device, and the non-reported projection coefficients are zero, so that the network side device can know which projection coefficients are non-zero values and which projection coefficients are zero, and the recovery of the network side device on channel information is facilitated.

Optionally, the terminal reports W non-zero values in the n×m orthogonal base pairs to a network side device, including any one of the following:

Reporting, by the terminal, a combination number to a network side device, where the positions of the W non-zero values in each subband are the same, where the combination number is used to characterize position information of the W non-zero values in the n×m orthogonal base pairs;

and under the condition that the positions of the W non-zero values in each sub-band are different, the terminal reports an NxM bitmap corresponding to each sub-band, wherein the NxM bitmap corresponds to the NxM orthogonal base pairs, and the bitmap is used for representing the position information of the W non-zero values in the N xM orthogonal base pairs in the corresponding sub-bands.

In this embodiment of the present application, the terminal obtains projection coefficients of the channel matrix estimated by each subband on N first orthogonal bases and M second orthogonal bases, and then each subband corresponds to n×m orthogonal base pairs, that is, n×m projection coefficients are obtained for each subband. The N first orthogonal bases corresponding to each subband may be the same or different, and the M second orthogonal bases corresponding to each subband may be the same or different, so that the n×m orthogonal base pairs obtained corresponding to each subband may be the same or different.

For example, in one embodiment, the n×m orthogonal base pairs corresponding to each subband are the same, and the distribution positions of the W non-zero values in the n×m orthogonal base pairs corresponding to each subband are also the same, where the terminal may report a combination number to the network side device, where the combination number is used to characterize the position information of the W non-zero values in the n×m orthogonal base pairs. Because the distribution positions of the W non-zero values corresponding to each sub-band in the N multiplied by M orthogonal base pairs are the same, the terminal only needs to report one combination number, and the position information of the W non-zero values corresponding to each sub-band is not required to be reported, so that the reporting resource of the terminal can be effectively saved. Alternatively, the combination number may be a combination of a set of values, e.g. each value representing a non-zero value of position information.

Or in another embodiment, the distribution positions of W non-zero values in the n×m orthogonal base pairs corresponding to each sub-band are different, in this case, the terminal reports an n×m bitmap (bitmap) corresponding to each sub-band to the network side device, where one sub-band corresponds to one bitmap, and one bitmap is used to characterize the position information of the W non-zero values corresponding to the sub-band in the n×m orthogonal base pairs. The n×m bitmaps correspond to the n×m orthogonal base pairs, so that the position information of the W non-zero values in the n×m orthogonal base pairs can be more accurately represented through the bitmaps, so that the network side device can learn the distribution condition of the W non-zero values corresponding to each sub-band based on the received bitmaps, and the network side device is more beneficial to recovering the channel information.

Optionally, before the terminal reports W non-zero values in the nxm orthogonal base pairs to a network side device, the method further includes:

the terminal receives second indication information sent by the network side equipment, wherein the second indication information is used for indicating the value of the W.

That is, the network-side device may indicate the number of non-zero values to the terminal, which may determine the W non-zero values based on the indication of the network-side device. It should be noted that, in the case where the value of W is equal to the product of M and N, the terminal may not need to send the above-mentioned combination number or bitmap to the network side device.

In this embodiment of the present application, the terminal may report the projection coefficients corresponding to each sub-band, or may report only the projection coefficients corresponding to some sub-bands.

Optionally, the terminal reports the projection coefficient of each sub-band to a network side device, including:

and under the condition that the error value between the projection coefficients of the two sub-bands is smaller than a preset threshold value, the terminal reports the projection coefficient corresponding to any one sub-band of the two sub-bands to network side equipment.

In this embodiment of the present application, the terminal obtains projection coefficients of the channel matrix estimated by each subband on N first orthogonal bases and M second orthogonal bases, that is, each subband may correspondingly obtain n×m projection coefficients. Alternatively, the terminal may select the largest projection coefficient of each of the two sub-bands to calculate the error value, or may calculate the error value by an average value of all projection coefficients of the two sub-bands, or the like. If the error value between the projection coefficients of the two sub-bands is smaller than the preset threshold, the terminal may report only the projection coefficient of one sub-band to the network side device. Therefore, reporting resources of the terminal can be effectively saved.

Optionally, the method further comprises:

The terminal reports first distribution information to the network side equipment, wherein the first distribution information is used for representing the distribution condition of the sub-bands reporting the projection coefficients in all the sub-bands.

It can be understood that if the error value between the projection coefficients of the two sub-bands is smaller than the preset threshold, the terminal only reports the projection coefficient corresponding to one of the sub-bands, and further, the terminal may also report the distribution of the sub-bands reporting the projection coefficients in all the sub-bands to the network side device. Therefore, the network side equipment can acquire the positions of the sub-bands without reporting the projection coefficients based on the distribution condition reported by the terminal, and the recovery of the network side equipment to the channel information is facilitated.

Optionally, the terminal reports the first distribution information to the network side device, including:

and the terminal reports the first distribution information to network side equipment through a first part of Channel State Information (CSI).

In this embodiment of the present application, the first distribution information may be reported in CSI part 1.

In order to better understand the technical solutions of the embodiments of the present application, the following description is given by means of a specific embodiment.

Example 1

The terminal carries out channel estimation on 13 subbands to obtain 13 4×32 channel matrixes H1 and H2 … H13; first, the terminal performs an oversampling process on the first orthogonal basis, where the oversampling coefficient is 4, and then the terminal generates 128 first orthogonal basis of discrete fourier transform (Discrete Fourier Transform, DFT) in 32 dimensions, to form a first orthogonal basis matrix b= [ B1, B2 … B128], where each four first orthogonal basis is an oversampling group (i.e., B1, B2, B3, B4 is an oversampling group), and the first orthogonal basis in each oversampling group is orthogonal in sequence, for example: b1, B5, B9 … B125 are orthogonal, B2, B6, B10 … B126 are orthogonal, etc. The terminal calculates covariance of the first orthogonal basis, and the calculation formula is as follows:

Wherein Cov represents covariance matrix, H _i Represents the i first orthogonal basis (i=1, 2 … 13),representing the conjugate transpose of the i first orthogonal base.

Then, the projection value of each first orthogonal basis is calculated, and the calculation formula is as follows:

wherein v is _k Representing the kth orthogonal basisProjection value of B _k Represents the kth orthogonal basis and,representing the conjugate transpose of the kth orthogonal basis, cov represents the covariance matrix.

Selecting the maximum projection value v _k The corresponding orthogonal base index k is the selected oversampling group index, and then the N first orthogonal bases with larger projection values in the oversampling group are selected, that is, the N first orthogonal bases are determined.

On each sub-band, the terminal selects 2 second orthogonal bases, the second orthogonal bases are subjected to oversampling, the oversampling coefficient is 4, the terminal calculates the corresponding covariance in the ith sub-band, and the calculation formula is as follows:

wherein Cov represents covariance matrix, H _i Represents the ith second orthogonal basis (i=1, 2),representing the conjugate transpose of the ith second orthogonal base.

The 2 second orthogonal bases of the ith subband are selected in the same manner as the first orthogonal bases.

At this time, the terminal obtains N first orthogonal bases M second orthogonal bases per subbandi denotes a subband index. The terminal calculates the corresponding projection coefficient in each sub-band, and the calculation formula is as follows:

wherein,projection coefficients representing subband i, +.>M second orthogonal bases representing subband i are conjugate transposed, B _c Representing the first orthogonal basis, H represents the channel matrix for subband i.

The terminal willThe larger W non-zero values and the corresponding position information are reported to the network side equipment, and the network side equipment constructs projection coefficients +.>Wherein->Coefficients of non-zero value and->The remainder are the same, default values, e.g. 0./>

The network side equipment restores the integrity according to the index of the orthogonal base and the index of the oversampling group reported by the terminalAnd B _c On each sub-band, the network side device calculates a corresponding full channel matrix as follows:

wherein H is _i Representing a full channel matrix, B _r A second orthogonal basis is represented as such,representation of the throwShadow factor->Representing the first orthogonal basis to be conjugate transposed.

Therefore, the network side equipment can recover the full channel matrix, namely the channel matrix of the receiving end and the sending end can be obtained, so that channel information at a certain moment in the future can be predicted better, and the accuracy of channel information prediction is improved.

Referring to fig. 3, fig. 3 is a flowchart of another channel matrix processing method according to an embodiment of the present application, as shown in fig. 3, the method includes the following steps:

step 301, network side equipment receives a projection coefficient reported by a terminal;

step 302, the network side equipment recovers a channel matrix according to the projection coefficient;

In the embodiment of the application, the network side equipment performs channel matrix recovery according to the projection coefficient of each sub-band reported by the terminal, so that full channel matrix information of the receiving end and the transmitting end can be obtained. Therefore, the network side equipment can obtain the channel matrix information of the transmitting end and the channel matrix information of the receiving end, and is more beneficial to predicting the channel information, so that the accuracy of channel information prediction is improved.

Optionally, the target orthogonal basis satisfies any one of the following:

The target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis corresponding to each sub-band is different;

wherein the target orthogonal basis comprises the first orthogonal basis and/or the second orthogonal basis.

the network side equipment receives third indication information sent by the terminal, wherein the third indication information is used for indicating the target orthogonal base corresponding to each sub-band.

Optionally, in a case where the target orthogonal base includes the first orthogonal base and the second orthogonal base, and the target orthogonal base corresponding to each subband is different, the method further includes:

the network side equipment receives at least one of the following reported by the terminal:

the index of the j groups is any one of N groups of first candidate orthogonal bases, the N groups of first candidate orthogonal bases are oversampling groups obtained by the terminal performing oversampling processing on the first candidate orthogonal bases, and the N first orthogonal bases are obtained by the terminal by selecting from the j groups of first candidate orthogonal bases;

the k groups are any one of M groups of second candidate orthogonal bases, the M groups of second candidate orthogonal bases are oversampling groups obtained by the terminal performing oversampling processing on the second candidate orthogonal bases, and the M second orthogonal bases are obtained by the terminal by selecting from the k groups of first candidate orthogonal bases;

Indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

Optionally, the method further comprises:

the network side equipment receives the maximum port number of the receiving end antenna reported by the terminal;

wherein M is less than or equal to the maximum number of ports.

Optionally, the method further comprises any one of the following:

the network side equipment sends first indication information to the terminal, wherein the first indication information is used for indicating the value of M;

and the network side equipment receives the value of M reported by the terminal, and the value of M is determined by the terminal.

Optionally, the method further comprises:

the network side equipment receives fourth indication information sent by the terminal, wherein the fourth indication information is used for indicating L receiving ports of the terminal, and L is smaller than M.

Optionally, when the terminal determines the M second orthogonal bases through oversampling, the terminal generates a corresponding number of orthogonal bases based on a maximum port number of the receiving end, and the value of M is equal to the corresponding number, the method further includes:

and the network side equipment receives indexes of the oversampling groups corresponding to the M second orthogonal bases, which are reported by the terminal.

Optionally, the method further comprises:

the network side equipment receives W non-zero values in N multiplied by M orthogonal base pairs reported by the terminal, wherein W is a positive integer;

wherein the n×m orthogonal base pairs are determined for the terminal based on the N first orthogonal bases and the M second orthogonal bases.

Optionally, the network side device receives W non-zero values in n×m orthogonal base pairs reported by the terminal, including any one of the following:

in the case that the positions of the W non-zero values in each sub-band are the same, the network side equipment receives the combination number reported by the terminal, wherein the combination number is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs;

and under the condition that the positions of the W non-zero values in each sub-band are different, the network side equipment receives an N multiplied by M bitmap corresponding to each sub-band reported by the terminal, wherein the N multiplied by M bitmap corresponds to the N multiplied by M orthogonal base pairs, and the bitmap is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs in the corresponding sub-bands.

Optionally, before the network side device receives W non-zero values in the n×m orthogonal base pairs reported by the terminal, the method further includes:

The network side equipment sends second indicating information to the terminal, wherein the second indicating information is used for indicating the value of the W.

Optionally, the network side device receives a projection coefficient reported by a terminal, including:

and under the condition that the error value between the projection coefficients of the two sub-bands is smaller than a preset threshold value, the network side equipment receives the projection coefficient corresponding to any one sub-band of the two sub-bands reported by the terminal.

Optionally, the method further comprises:

the network side equipment receives first distribution information reported by the terminal, wherein the first distribution information is used for representing the distribution condition of the sub-bands reporting the projection coefficients in all the sub-bands.

Optionally, the network side device receives first distribution information reported by the terminal, including:

and the network side equipment receives the first distribution information reported by the terminal through the first part of the CSI.

It should be noted that, in the channel matrix processing method provided in the embodiment of the present application, the execution body is a network side device, and corresponding to the channel matrix processing method executed by the terminal, the related concepts and specific implementation processes related to the embodiment of the present application may be described in the embodiment of the method described with reference to fig. 2, and in order to avoid repetition, a description is omitted here.

According to the channel matrix processing method provided by the embodiment of the application, the execution body can be a channel matrix processing device. In the embodiment of the present application, a channel matrix processing device is described by taking an example that the channel matrix processing device executes a channel matrix processing method.

Referring to fig. 4, fig. 4 is a block diagram of a channel matrix processing apparatus according to an embodiment of the present application, and as shown in fig. 4, the channel matrix processing apparatus 400 includes:

a determining module 401, configured to determine N first orthogonal bases and M second orthogonal bases, where the first orthogonal bases correspond to spatial information of a transmitting end antenna, the second orthogonal bases correspond to spatial information of a receiving end antenna, and N and M are both positive integers;

an obtaining module 402, configured to obtain a channel matrix estimated by each subband, and obtain projection coefficients of the channel matrix estimated by each subband on the N first orthogonal bases and the M second orthogonal bases;

a reporting module 403, configured to report the projection coefficient of each sub-band to a network side device.

Optionally, the target orthogonal basis satisfies any one of the following:

the target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis corresponding to each sub-band is different;

Optionally, in a case that the target orthogonal basis corresponding to each subband is different, the apparatus is further configured to:

and indicating the target orthogonal base corresponding to each sub-band to network side equipment.

Optionally, in a case where the target orthogonal base includes the first orthogonal base and the second orthogonal base, and the target orthogonal base corresponding to each subband is different, the determining module 401 is further configured to:

determining a first candidate orthogonal base and a second candidate orthogonal base, and respectively carrying out oversampling treatment on the first candidate orthogonal base and the second candidate orthogonal base to obtain n groups of first candidate orthogonal bases and m groups of second candidate orthogonal bases, wherein n and m are positive integers;

selecting from the j groups of first candidate orthogonal bases to obtain N first orthogonal bases, and selecting from the k groups of second candidate orthogonal bases to obtain M second orthogonal bases;

the j groups of first candidate orthogonal bases are any one of the n groups of first candidate orthogonal bases, and the k groups of second candidate orthogonal bases are any one of the m groups of second candidate orthogonal bases.

Optionally, the reporting module 403 is further configured to:

reporting at least one of the following to network side equipment:

the index of the j group;

an index of the k groups;

indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

Optionally, the reporting module 403 is further configured to:

reporting the maximum port number of the receiving end antenna to network side equipment;

wherein M is less than or equal to the maximum number of ports.

Optionally, the apparatus further comprises:

the receiving module is used for receiving first indication information sent by the network side equipment and determining the value of the M based on the first indication information, wherein the first indication information is used for indicating the value of the M;

alternatively, the determining module 401 is further configured to: and determining the value of M by self.

Optionally, the apparatus is further configured to perform any one of:

mapping the antenna into M receiving ports;

and determining L receiving ports, and indicating the L receiving ports to network side equipment, wherein L is less than M.

Optionally, in the case that the receiving module receives the first indication information sent by the network side device and determines the value of M based on the first indication information, the determining module 401 is further configured to:

and generating a corresponding number of orthogonal bases based on the maximum port number of the receiving end, and determining M second orthogonal bases from the generated corresponding number of orthogonal bases.

Optionally, in the case that the apparatus determines the M second orthogonal bases through an oversampling process, and the value of M is equal to the corresponding number, the reporting module 403 is further configured to:

and reporting indexes of the oversampling groups corresponding to the M second orthogonal bases to network side equipment.

Optionally, in the case that the determining module 401 is configured to determine the value of M by itself, the reporting module 403 is further configured to:

and reporting the value of M to network side equipment.

Optionally, the determining module 401 is further configured to:

determining n×m orthogonal base pairs based on the N first orthogonal bases and the M second orthogonal bases;

the reporting module 403 is further configured to: and reporting W non-zero values in the N multiplied by M orthogonal base pairs to network side equipment, wherein W is a positive integer.

Optionally, the reporting module 403 is further configured to perform any one of the following:

Reporting a combination number to network side equipment under the condition that the positions of the W non-zero values in each sub-band are the same, wherein the combination number is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs;

and when the positions of the W non-zero values in each sub-band are different, reporting an NxM bitmap corresponding to each sub-band to network side equipment, wherein the NxM bitmap corresponds to the NxM orthogonal base pairs, and the bitmap is used for representing the position information of the W non-zero values in the N xM orthogonal base pairs in the corresponding sub-bands.

Optionally, the device is further configured to:

and receiving second indicating information sent by the network side equipment, wherein the second indicating information is used for indicating the value of the W.

Optionally, the reporting module 403 is further configured to:

and reporting the projection coefficient corresponding to any one of the two sub-bands to network side equipment under the condition that the error value between the projection coefficients of the two sub-bands is smaller than a preset threshold value.

Optionally, the reporting module 403 is further configured to:

and reporting first distribution information to network side equipment, wherein the first distribution information is used for representing the distribution condition of the sub-bands reporting the projection coefficients in all the sub-bands.

Optionally, the reporting module 403 is further configured to:

and reporting the first distribution information to network side equipment through the first part of the CSI.

In this embodiment of the present application, the device calculates projection coefficients of a channel matrix estimated by each subband on N first orthogonal bases and M second orthogonal bases, where the first orthogonal bases correspond to airspace information of a transmitting end antenna, the second orthogonal bases correspond to airspace information of a receiving end antenna, and further calculation of the projection coefficients also considers the receiving end and the transmitting end at the same time, and the network side device performs channel matrix recovery according to the projection coefficients of each subband reported by the device, so as to obtain full channel matrix information of the receiving end and the transmitting end. Therefore, the network side equipment can obtain the channel matrix information of the transmitting end and the channel matrix information of the receiving end, and is more beneficial to predicting the channel information, so that the accuracy of channel information prediction is improved.

The channel matrix processing apparatus 400 in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The channel matrix processing apparatus 400 provided in this embodiment of the present application can implement each process implemented by the embodiment of the method described in fig. 2, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Referring to fig. 5, fig. 5 is a block diagram of another channel matrix processing apparatus according to an embodiment of the present application, and as shown in fig. 5, the channel matrix processing apparatus 500 includes:

the receiving module 501 is configured to receive a projection coefficient reported by a terminal;

a recovery module 502, configured to perform recovery of a channel matrix according to the projection coefficient;

Optionally, the target orthogonal basis satisfies any one of the following:

the target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis corresponding to each sub-band is different;

Optionally, in a case where the target orthogonal basis corresponding to each subband is different, the receiving module 501 is further configured to:

And receiving third indication information sent by the terminal, wherein the third indication information is used for indicating the target orthogonal base corresponding to each sub-band.

Optionally, in a case where the target orthogonal base includes the first orthogonal base and the second orthogonal base, and the target orthogonal base corresponding to each sub-band is different, the receiving module 501 is further configured to:

receiving at least one of the following reported by the terminal:

indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

Optionally, the receiving module 501 is further configured to:

receiving the maximum port number of the receiving end antenna reported by the terminal;

wherein M is less than or equal to the maximum number of ports.

Optionally, the apparatus further comprises a sending module, configured to: sending first indication information to the terminal, wherein the first indication information is used for indicating the value of M; or,

the receiving module 501 is further configured to receive the value of M reported by the terminal, where the value of M is determined by the terminal.

Optionally, the receiving module 501 is further configured to:

and receiving fourth indication information sent by the terminal, wherein the fourth indication information is used for indicating L receiving ports of the terminal, and L is smaller than M.

Optionally, when the terminal determines the M second orthogonal bases through oversampling, the terminal generates a corresponding number of orthogonal bases based on a maximum port number of a receiving end, and the value of M is equal to the corresponding number, the receiving module 501 is further configured to:

and receiving indexes of the oversampling groups corresponding to the M second orthogonal bases, which are reported by the terminal.

Optionally, the receiving module 501 is further configured to:

receiving W non-zero values in N multiplied by M orthogonal base pairs reported by the terminal, wherein W is a positive integer;

Optionally, the receiving module 501 is further configured to perform any one of the following:

receiving a combination number reported by the terminal under the condition that the positions of the W non-zero values in each sub-band are the same, wherein the combination number is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs;

and under the condition that the positions of the W non-zero values in each sub-band are different, receiving an N multiplied by M bitmap corresponding to each sub-band, which is reported by the terminal, wherein the N multiplied by M bitmap corresponds to the N multiplied by M orthogonal base pairs, and the bitmap is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs in the corresponding sub-bands.

Optionally, the apparatus further comprises a sending module, configured to: and sending second indicating information to the terminal, wherein the second indicating information is used for indicating the value of the W.

Optionally, the receiving module 501 is further configured to:

and receiving the projection coefficient corresponding to any one of the two sub-bands reported by the terminal under the condition that the error value between the projection coefficients of the two sub-bands is smaller than a preset threshold value.

Optionally, the receiving module 501 is further configured to:

and receiving first distribution information reported by the terminal, wherein the first distribution information is used for representing the distribution condition of the sub-bands reporting the projection coefficients in all the sub-bands.

Optionally, the receiving module 501 is further configured to:

and receiving the first distribution information reported by the terminal through the first part of the CSI.

In the embodiment of the application, the device performs channel matrix recovery according to the projection coefficient of each sub-band reported by the terminal, so that full channel matrix information of the receiving end and the transmitting end can be obtained. Therefore, the device not only can obtain the channel matrix information of the transmitting end, but also can obtain the channel matrix information of the receiving end, and is more beneficial to predicting the channel information so as to improve the accuracy of channel information prediction

The channel matrix processing apparatus 500 provided in this embodiment of the present application can implement each process implemented by the embodiment of the method described in fig. 3, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, where the memory 602 stores a program or instructions that can be executed on the processor 601, for example, when the communication device 600 is a terminal, the program or instructions implement, when executed by the processor 601, the steps of the method embodiment described in fig. 2, and achieve the same technical effects. When the communication device 600 is a network side device, the program or the instructions, when executed by the processor 601, implement the steps of the method embodiment described in fig. 3, and achieve the same technical effects, and for avoiding repetition, will not be described herein.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for determining N first orthogonal bases and M second orthogonal bases, the first orthogonal bases correspond to the airspace information of a transmitting end antenna, the second orthogonal bases correspond to the airspace information of a receiving end antenna, and N and M are both positive integers; the method comprises the steps of obtaining a channel matrix estimated by each sub-band, and obtaining projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases; the communication interface is used for reporting the projection coefficient of each sub-band to network side equipment. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 7 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

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

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption 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 shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video 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 at least one of 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, 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, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an 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 and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

Wherein the processor 710 is configured to:

determining N first orthogonal bases and M second orthogonal bases, wherein the first orthogonal bases correspond to the spatial information of the transmitting end antenna, the second orthogonal bases correspond to the spatial information of the receiving end antenna, and N and M are positive integers;

obtaining a channel matrix estimated by each sub-band, and obtaining projection coefficients of the channel matrix estimated by each sub-band on the N first orthogonal bases and the M second orthogonal bases;

and the radio frequency unit 701 is configured to report the projection coefficient of each sub-band to a network side device.

In this embodiment of the present invention, the terminal 700 calculates the projection coefficients of the estimated channel matrix of each subband on N first orthogonal bases and M second orthogonal bases, where the first orthogonal bases correspond to the spatial information of the transmitting end antenna, the second orthogonal bases correspond to the spatial information of the receiving end antenna, and further the calculation of the projection coefficients also considers the receiving end and the transmitting end at the same time, and the network side device performs channel matrix recovery according to the projection coefficients of each subband reported by the terminal, so as to obtain the full channel matrix information of the receiving end and the transmitting end. Therefore, the network side equipment can obtain the channel matrix information of the transmitting end and the channel matrix information of the receiving end, and is more beneficial to predicting the channel information, so that the accuracy of channel information prediction is improved.

It should be noted that, the terminal 700 provided in this embodiment of the present application can implement each process of the embodiment of the method described in fig. 2 and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for receiving the projection coefficient reported by the terminal; the processor is used for recovering the channel matrix according to the projection coefficient; the projection coefficients are obtained by projecting channel matrixes estimated by each sub-band on N first orthogonal bases and M second orthogonal bases by the terminal, wherein the first orthogonal bases correspond to the airspace information of the antenna of the transmitting end, the second orthogonal bases correspond to the airspace information of the antenna of the receiving end, and N and M are positive integers. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 8, the network side device 800 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information via the antenna 81, and transmits 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 processed information to the radio frequency device 82, and the radio frequency device 82 processes the received information and transmits the processed information through the antenna 81.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 83, and the baseband apparatus 83 includes a baseband processor.

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

The network-side device may also include a network interface 86, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 800 of the embodiment of the present invention further includes: instructions or programs stored in the memory 85 and executable on the processor 84, the processor 84 invokes the instructions or programs in the memory 85 to perform the method performed by the modules shown in fig. 5, and achieve the same technical effects, and are not repeated here.

The 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 the program or the instruction when executed by a processor implement each process of the method embodiment of fig. 2 or implement each process of the method embodiment of fig. 3, and the same technical effects can be achieved, so that repetition is avoided and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the present application further provides a chip, 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 program or an instruction, implement each process of the method embodiment described in fig. 2, or implement each process of the method embodiment described in fig. 3, and achieve the same technical effect, so that repetition is avoided, and no further description is given here.

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

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement the respective processes of the method embodiment described above in fig. 2, or implement the respective processes of the method embodiment described above in fig. 3, and achieve the same technical effects, so that repetition is avoided and a detailed description thereof is omitted herein.

The embodiment of the application also provides a communication system, which comprises: the terminal may be configured to perform the steps of the channel matrix processing method as described in fig. 2, and the network side device may be configured to perform the steps of the channel matrix processing method as described in fig. 3.

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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A channel matrix processing method, comprising:

2. The method of claim 1, wherein the target orthogonal basis satisfies any one of:

the target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis corresponding to each sub-band is different;

3. The method of claim 2, wherein in the case where the target orthogonality corresponding to each subband is different, the method further comprises:

4. The method according to claim 2, wherein in the case where the target orthogonal basis includes the first orthogonal basis and the second orthogonal basis, the target orthogonal basis corresponding to each of the subbands is different, the terminal determines N first orthogonal basis and M second orthogonal basis, including:

5. The method according to claim 4, wherein the method further comprises:

the index of the j group;

An index of the k groups;

indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

6. The method of claim 5, wherein the index of the j groups corresponding to each subband is the same and the index of the k groups corresponding to each subband is the same or different; or,

the index of the j groups corresponding to each sub-band is different, and the index of the k groups corresponding to each sub-band is the same or different.

7. The method of claim 1, wherein before the terminal determines the N first orthogonal bases and the M second orthogonal bases, the method further comprises:

the terminal reports the maximum port number of the receiving end antenna to network side equipment;

wherein M is less than or equal to the maximum number of ports.

8. The method of claim 1, wherein before the terminal determines the M second orthogonal bases, the method further comprises any one of:

and the terminal automatically determines the value of M.

9. The method according to claim 8, wherein in a case where the terminal receives first indication information sent by a network side device and determines the value of M based on the first indication information, the method further includes any one of:

the terminal maps the antenna into M receiving ports;

10. The method according to claim 8, wherein in a case that the terminal receives first indication information sent by a network side device and determines the value of M based on the first indication information, the terminal determines M second orthogonal bases, including:

11. The method according to claim 10, wherein in the case where the terminal determines the M second orthogonal bases through an oversampling process, and the value of M is equal to the corresponding number, the method further comprises:

12. The method according to claim 8, wherein in case the terminal determines the value of M by itself, the method further comprises:

and the terminal reports the value of M to network side equipment.

13. The method according to claim 1, wherein the method further comprises:

14. The method of claim 13, wherein the terminal reports W non-zero values in the nxm orthogonal base pairs to a network side device, including any one of:

and under the condition that the positions of the W non-zero values in each sub-band are different, the terminal reports an N multiplied by M bitmap corresponding to each sub-band to network side equipment, wherein the N multiplied by M bitmap corresponds to the N multiplied by M orthogonal base pairs, and the bitmap is used for representing the position information of the W non-zero values in the N multiplied by M orthogonal base pairs in the corresponding sub-bands.

15. The method of claim 13, wherein before the terminal reports W non-zero values in the nxm orthogonal base pairs to a network side device, the method further comprises:

16. The method according to claim 1, wherein the reporting, by the terminal, the projection coefficient of each subband to a network side device includes:

17. The method of claim 16, wherein the method further comprises:

18. The method of claim 17, wherein the terminal reports the first distribution information to the network side device, including:

19. A channel matrix processing method, comprising:

20. The method of claim 19, wherein the target orthogonal basis satisfies any one of:

the target orthogonal basis corresponding to each sub-band is the same;

the target orthogonal basis corresponding to each sub-band is different;

21. The method of claim 20, wherein in the case that the target orthogonality corresponding to each subband is different, the method further comprises:

22. The method of claim 20, wherein in the case where the target orthogonal basis includes the first orthogonal basis and the second orthogonal basis, the target orthogonal basis for each of the subbands is different, the method further comprises:

indexes of the N first orthogonal bases;

and indexes of the M second orthogonal bases.

23. The method of claim 19, wherein the method further comprises:

wherein M is less than or equal to the maximum number of ports.

24. The method of claim 19, further comprising any one of:

25. The method of claim 24, wherein the method further comprises:

26. The method according to claim 19, wherein in a case where the terminal determines the M second orthogonal bases through an oversampling process, the terminal generates a corresponding number of orthogonal bases based on a maximum port number of a receiving end, and the value of M is equal to the corresponding number, the method further comprises:

27. The method of claim 19, wherein the method further comprises:

28. The method of claim 27, wherein the network side device receives W non-zero values in n×m orthogonal base pairs reported by the terminal, including any one of the following:

29. The method according to claim 27, wherein before the network side device receives W non-zero values in the N x M orthogonal base pairs reported by the terminal, the method further comprises:

30. The method of claim 19, wherein the network side device receives the projection coefficients reported by the terminal, and the method comprises:

31. The method of claim 30, wherein the method further comprises:

32. The method of claim 31, wherein the network side device receives the first distribution information reported by the terminal, and the method comprises:

33. A channel matrix processing apparatus, comprising:

34. A channel matrix processing apparatus, comprising:

35. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the channel matrix processing method of any of claims 1-18.

36. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the channel matrix processing method of any of claims 19-32.

37. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor, implements the steps of the channel matrix processing method according to any of claims 1-18, or the steps of the channel matrix processing method according to any of claims 19-32.