WO2016008163A1 - Precoding matrix generation method, base station and user equipment - Google Patents

Abstract

Provided are a precoding matrix generation method, base station and user equipment (UE), the base station comprising: a determination module, used to determine at least two antenna port groups, antenna ports in the at least two antenna port groups being a part of a plurality of antenna ports; a transmitting module, used to transmit, via the antenna ports of the at least two antenna port groups determined by the determination module, to a UE reference signals for measuring channel status information (CSI); a receiving module, used to receive the CSI corresponding respectively to at least two antenna port groups transmitted by the UE according to the reference signals transmitted by the transmitting module, the CSI comprising at least two precoding matrix indicators (PMIs) corresponding to at least two antenna port groups; an acquisition module, used to respectively acquire at least two precoding matrixes according to the at least two PMIs received by the receiving module; and a generation module, used to generate precoding matrixes corresponding to the plurality of antenna ports according to the at least two precoding matrixes acquired by the acquisition module.

Description

 Method, base station and user equipment for generating precoding matrix

 The present invention relates to the field of communications, and more particularly to a method, base station and user equipment for generating a precoding matrix. Background technique

 In the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) or LTE-Advanced (LTE-A) system The increase in the number of antenna ports on the data transmitting end can provide higher spatial freedom, which creates favorable conditions for multiplexing multiple data streams in the downlink space. The data transmitter obtains the high spatial freedom that large-scale antennas can provide by acquiring Channel State Information (CSI).

 Currently, when a base station transmits a pilot signal to all user equipments (UEs) in a cell, each antenna port of the base station antenna is transmitted corresponding to one pilot, so the overhead of the downlink pilot is large. The UE performs CSI measurement according to the received pilot signal, and determines a precoding matrix according to the CSI measurement result and performs quantization, and acquires a rank indicator for indicating a precoding matrix in the precoding codebook according to the quantized precoding matrix ( Rank Indicator, RI) and a Precoding Matrix Indicator (PMI), and feeding back the RI and PMI to the base station, so that the base station determines the precoding matrix.

 Since the amount of downlink pilots is proportional to the number of antenna ports on the data transmitting end, when the number of antenna ports is large, the overhead of the downlink pilot consumes a large amount of time-frequency resources, and the time-frequency resources used for data transmission are compressed. , seriously affecting the throughput of the transmission system. Summary of the invention

 The present invention provides a method for generating a precoding matrix, a base station, and a user equipment, which can solve the problem that the overhead of the downlink pilot in a large-scale antenna system occupies a large amount of time-frequency resources, thereby effectively increasing the throughput of the system.

In a first aspect, a base station is provided, the base station includes: a determining module, configured to determine at least two antenna port groups, and an antenna port in the at least two antenna port groups is a part of the plurality of antenna ports; a sending module, Antenna in at least two antenna port groups determined by the determining module The port sends a reference signal for the channel state information CSI measurement to the user equipment _UE , and the receiving module is configured to receive the CSI corresponding to the at least two antenna port groups respectively sent by the UE according to the reference signal sent by the sending module, where the CSI includes and at least The at least two precoding matrices corresponding to the two antenna port groups indicate the PMI; the obtaining module is configured to respectively acquire at least two precoding matrices according to the at least two PMIs received by the receiving module, and the generating module, configured to acquire according to the acquiring module At least two precoding matrices generate precoding matrices corresponding to the plurality of antenna ports.

 With reference to the first aspect, in a first possible implementation manner of the first aspect, the sending module sends, by using an antenna port in the at least two antenna port groups, a reference signal for channel state information CSI measurement to the user equipment UE Before, it is further used to send information of at least two antenna port groups and antenna port information of each antenna port group to the UE.

 With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, Or the pattern information corresponding to the antenna port in each antenna port group, and the pattern information is used to indicate the antenna port in each antenna port group.

 With reference to the first possible implementation manner or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the sending module is specifically configured to use UE specific signaling or a cell specific Let, send information of at least two antenna port groups and antenna port information of each antenna port group to the UE.

 In combination with the first aspect or any of the foregoing possible implementation manners, in a fourth possible implementation manner of the first aspect, the generating module is specifically configured to use the Kroneck according to the at least two precoding matrices The function generates a precoding matrix corresponding to multiple antenna ports.

 With reference to the first aspect, or any one of the foregoing possible implementation manners, in a fifth possible implementation manner of the foregoing aspect, the CSI further includes at least the at least one antenna port group corresponding to the at least one antenna port group a rank indicator RI, where the acquiring module is configured to obtain at least two precoding matrices by querying at least two precoding codebooks corresponding to the at least two antenna port groups respectively according to the at least two PMIs and the at least one RI. .

With reference to the first aspect, or any one of the foregoing possible implementation manners, in a sixth possible implementation manner of the first aspect, the at least two antenna port groups include a horizontal antenna port group and a vertical antenna port group, where the determining The module is specifically configured to determine, as the horizontal antenna port group, an antenna port corresponding to at least one row of antenna elements arranged in a horizontal direction in an antenna array of the base station, and to antennas corresponding to at least one column of antenna elements arranged in a vertical direction in the antenna array. The port is determined to be the vertical antenna Port group.

 With reference to the sixth possible implementation of the first aspect, in a seventh possible implementation manner of the first aspect, the horizontal antenna port group corresponds to a row of antenna elements arranged in a horizontal direction in the antenna array, and the vertical antenna port group corresponds to And a receiving module, configured to receive a first RI and a first PMI sent by the UE, used to indicate a precoding matrix in the first precoding codebook, and receive the UE, and send the UE to send a second PMI for indicating a precoding matrix in the second precoding codebook, wherein the first precoding codebook corresponds to a horizontal antenna port group, and the second precoding codebook corresponds to a vertical antenna port group.

 With reference to the first aspect, or any one of the foregoing possible implementation manners, in an eighth possible implementation manner of the first aspect, the at least two antenna port groups include a first antenna port group and a second antenna port group, The module is specifically configured to divide the antenna array of the base station into four sub-arrays of equal size, determine the antenna port corresponding to one of the four sub-arrays as the first antenna port group, and position the other three sub-arrays in the four sub-arrays The antenna ports corresponding to the same three frames are determined as the second antenna port group.

 A second aspect provides a user equipment, where the user equipment includes: a determining module, configured to determine at least two antenna port groups, and an antenna port in the at least two antenna port groups is a part of the antenna ports in the antenna array; And receiving, by the determining module, the antenna port in the at least two antenna port groups, receiving a reference signal sent by the base station for CSI measurement of the channel state information; and sending, by the sending module, sending, to the base station, according to the reference signal received by the receiving module The CSI corresponding to the at least two antenna port groups, the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups.

 With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving module is configured to receive information about the at least two antenna port groups sent by the base station, before the determining module determines the at least two antenna port groups The antenna port information of each antenna port group, wherein the determining module is specifically configured to determine at least two antenna port groups according to information of the at least two antenna port groups and antenna port information of each antenna port group.

 With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, Or the pattern information corresponding to the antenna port in each antenna port group, and the pattern information is used to indicate the antenna port in each antenna port group.

In combination with the first possible implementation of the second aspect or the second possible implementation, In a third possible implementation manner of the second aspect, the receiving module is specifically configured to receive information about two antenna port groups sent by the base station and antenna port information of each antenna port group by using UE-specific signaling or cell-specific signaling. .

 With reference to the second aspect, or any one of the foregoing possible implementation manners, in a fourth possible implementation manner of the second aspect, the CSI further includes at least the at least one antenna port group corresponding to the at least one antenna port group. A rank indicates RI.

 With reference to the second aspect, or any one of the foregoing possible implementation manners, in the fifth possible implementation manner of the second aspect, the user equipment further includes: an acquiring module, configured to obtain a CSI measurement result, according to the CSI measurement result Determining a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, and performing quantization on the precoding matrix, and querying a precoding codebook corresponding to each antenna port group according to the quantization result of the precoding matrix , get CSI.

 A third aspect provides a method for generating a precoding matrix, the method comprising: determining at least two antenna port groups, wherein antenna ports in the at least two antenna port groups are part of the plurality of antenna ports; The antenna port in the antenna port group, the reference signal for channel state information CSI measurement is sent to the user equipment UE; the CSI corresponding to the at least two antenna port groups respectively sent by the UE according to the reference signal, the CSI includes at least two The at least two precoding matrices corresponding to the antenna port group indicate the PMI; the at least two precoding matrices are respectively obtained according to the at least two PMIs; and the precoding matrices corresponding to the plurality of antenna ports are generated according to the at least two precoding matrices.

 With reference to the third aspect, in a first possible implementation manner of the third aspect, before the reference signal for channel state information CSI measurement is sent to the user equipment UE by using the antenna port in the at least two antenna port groups, the method is The method further includes: transmitting, to the UE, information of at least two antenna port groups and antenna port information of each antenna port group.

 With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, Or the pattern information corresponding to the antenna port in each antenna port group, and the pattern information is used to indicate the antenna port in each antenna port group.

With reference to the first possible implementation manner or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the information of the at least two antenna port groups and each antenna are sent to the UE. The antenna port information of the port group includes: sending, by using UE-specific signaling or cell-specific signaling, information of at least two antenna port groups and antenna port information of each antenna port group to the UE. With reference to the third aspect, or any one of the foregoing possible implementation manners, in a fourth possible implementation manner of the third aspect, the precoding matrix corresponding to the multiple antenna ports is generated according to the at least two precoding matrices. The method includes: generating, according to at least two precoding matrices, a precoding matrix corresponding to the plurality of antenna ports by using a Kroneck function.

 With reference to the third aspect, or any one of the foregoing possible implementation manners, in a fifth possible implementation manner of the third aspect, the CSI further includes at least the at least one antenna port group corresponding to the at least one antenna port group A rank indicator RI, wherein, according to at least two PMIs, obtaining at least two precoding matrices, comprising: querying at least two precodings corresponding to at least two antenna port groups respectively according to at least two PMIs and at least one RI The codebook acquires at least two precoding matrices.

 With reference to the third aspect, or any one of the foregoing possible implementation manners, in a sixth possible implementation manner of the third aspect, the at least two antenna port groups include a horizontal antenna port group and a vertical antenna port group, and at least two are determined. The antenna port group includes: determining an antenna port corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array of the base station as a horizontal antenna port group, and determining an antenna port corresponding to at least one column of antenna elements arranged in a vertical direction in the antenna array For the vertical antenna port group.

 With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the horizontal antenna port group corresponds to a row of antenna elements arranged in a horizontal direction in the antenna array, and the vertical antenna port group corresponds to An array of antennas arranged in a vertical direction in the antenna array, wherein the CSI corresponding to the at least two antenna port groups sent by the UE according to the reference information includes: receiving, by the receiving UE, a pre-instruction in the first pre-encoded codebook Encoding a first RI of the matrix and the first PMI, and receiving a second PMI sent by the UE to indicate a precoding matrix in the second precoding codebook, where the first precoding codebook corresponds to a horizontal antenna port group The second precoding codebook corresponds to the vertical antenna port group.

 With reference to the third aspect, or any one of the foregoing possible implementation manners, in an eighth possible implementation manner of the third aspect, the at least two antenna port groups include the first antenna port group and the second antenna port group, The at least two antenna port groups include: dividing the antenna array of the base station into four sub-arrays of equal size, determining the antenna port corresponding to one of the four sub-arrays as the first antenna port group, and the other three of the four sub-arrays The antenna ports corresponding to the three positions having the same position in the sub-array are determined as the second antenna port group.

A fourth aspect provides a method for generating a precoding matrix, the method comprising: determining at least two antenna port groups, wherein antenna ports in at least two antenna port groups are part of multiple antenna ports Receiving, by the antenna port of the at least two antenna port groups, a reference signal sent by the base station for channel state information CSI measurement; and transmitting, according to the reference signal, CSI, CSI corresponding to the at least two antenna port groups respectively to the base station At least two precoding matrixes corresponding to at least two antenna port groups are included to indicate the PMI.

 With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, before receiving the reference signal for channel state information CSI measurement sent by the base station by using the antenna port in the at least two antenna port groups, the method further The method includes: receiving information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group.

 With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, Or the pattern information corresponding to the antenna port in each antenna port group, and the pattern information is used to indicate the antenna port in each antenna port group.

 With reference to the first possible implementation manner of the fourth aspect, or the second possible implementation manner, in a third possible implementation manner of the fourth aspect, the information about the at least two antenna port groups sent by the base station and each The antenna port information of the antenna port group includes: receiving, by using UE-specific signaling or cell-specific signaling, information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group.

 With reference to the fourth aspect, or any one of the foregoing possible implementation manners, in a fourth possible implementation manner of the fourth aspect, the CSI further includes at least the at least one antenna port group corresponding to the at least one antenna port group A rank indicates RI.

 With reference to the fourth aspect, or any one of the foregoing possible implementation manners, in a fifth possible implementation manner of the fourth aspect, before the CSI corresponding to the at least two antenna port groups are respectively sent to the base station according to the reference signal The method further includes: obtaining a CSI measurement result; determining, according to the CSI measurement result, a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, and performing quantization on the precoding matrix; and quantifying the result according to the precoding matrix Querying a precoding codebook corresponding to each antenna port group to obtain CSI.

Based on the foregoing technical solution, the method for generating a precoding matrix, the base station, and the user equipment in the embodiment of the present invention, by using a part of the antenna ports of the multiple antenna ports, send a reference signal for CSI measurement to the UE, and receive the feedback of the UE. Composing at least two PIMs corresponding to the at least two antenna port groups included in the part of the antenna ports, and generating a precoding matrix corresponding to the plurality of antenna ports according to the at least two precoding matrices acquired by the at least two PMIs, which can be solved In large-scale antenna systems The overhead of the downlink pilot occupies a large amount of time-frequency resources, thereby effectively increasing the throughput of the system. DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

 1 is a schematic block diagram of a base station in accordance with one embodiment of the present invention.

 2 is a schematic block diagram of a user equipment in accordance with one embodiment of the present invention.

 3 is a schematic flow diagram of a method of generating a precoding matrix in accordance with one embodiment of the present invention.

 4 is a schematic flow chart of a method of generating a precoding matrix according to another embodiment of the present invention.

 FIG. 5 is a schematic flow chart of a method of generating a precoding matrix according to another embodiment of the present invention.

 FIG. 6 is a schematic block diagram of a base station according to another embodiment of the present invention.

 FIG. 7 is a schematic block diagram of a user equipment according to another embodiment of the present invention. detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

 It should be understood that, in the embodiment of the present invention, a terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, User equipment or user equipment (UE, User Equipment ^ terminal can be cellular phone, cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop) station, PDA (Personal Digital Assistant) , personal digital processing), handheld devices with wireless communication capabilities, in-vehicle devices, computing devices, or other processing devices connected to wireless modems.

It should also be understood that, in the embodiment of the present invention, the base station may be used to communicate with the mobile device, and the base station may Is a Wi-Fi AP (Access Point, Wireless Access Point), or GSM (Global System of Mobile communication) or CDMA (Code Division Multiple Access) BTS (Base Transceiver Station) , the base station), may be an NB (NodeB, base station) in WCDMA (Wideband Code Division Multiple Access), or may be an eNB or an eNodeB ( Evolutional Node) in LTE (Long Term Evolution) B, evolved base station), or a relay station or access point, or a base station device in a future 5G network.

 In the following, for ease of understanding and description, as an example and not limitation, the method for generating a precoding matrix, the base station and the user equipment UE in the frequency division duplex (FDD) system of the embodiment of the present invention are performed. And the action is explained. It should be understood that the method for generating a precoding matrix, the base station and the user equipment UE of the embodiment of the present invention are also adapted to a Time Division Duplexing (TDD) system.

 FIG. 1 shows a schematic block diagram of a base station 100 in accordance with one embodiment of the present invention. As shown in FIG. 1, the base station 100 includes: a determining module 110, a sending module 120, a receiving module 130, an obtaining module 140, and a generating module 150, where:

 The determining module 110 is configured to determine at least two antenna port groups, and the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports.

 The sending module 120 is configured to send, by using the antenna port of the at least two antenna port groups determined by the determining module 110, a reference signal for channel state information CSI measurement to the user equipment UE.

 The receiving module 130 is configured to receive, by using the reference signal sent by the sending module 120, the CSI corresponding to the at least two antenna port groups, where the CSI includes at least two precoding matrix indications corresponding to the at least two antenna port groups. PMI.

 The obtaining module 140 is configured to obtain at least two precoding matrices according to the at least two PMIs received by the receiving module 130.

 The generating module 150 is configured to generate a precoding matrix corresponding to multiple antenna ports according to at least two precoding matrices acquired by the obtaining module 140.

 Specifically, in the embodiment of the present invention, the base station 100 can determine at least two antenna port groups according to the arrangement manner of the antenna array. It should be noted that all antenna ports in the at least two antenna port groups are multiple antennas of the base station 100. A portion of the antenna port in the port.

The base station 100 may send a reference signal for CSI measurement to the UE through each of the at least two antenna port groups, and receive the UE feedback corresponding to each antenna port group respectively. CSI, the CSI includes a PMI for indicating a precoding matrix in a precoding codebook corresponding to each antenna port group.

 The base station 100 can obtain at least two precoding matrices by querying at least two precoding codebooks corresponding to the at least two antenna port groups respectively according to the at least two PMIs. And generating, according to the obtained at least two precoding matrices, a precoding matrix corresponding to the plurality of antenna ports.

 For example, in the embodiment of the present invention, the at least two antenna port groups may include a first antenna port group and a second antenna port group, and the sending module 120 may pass the antenna ports in the first antenna port group and the second antenna port group. Sending a reference signal for CSI measurement to the user equipment UE. The receiving module 130 may receive CSI corresponding to the first antenna port group and the second antenna port group respectively sent by the UE, where the CSI includes a first PMI corresponding to the first antenna port group and a second corresponding to the second antenna port group. Two PMI. The obtaining module 140 may obtain the first precoding matrix according to the first PMI, and obtain the second precoding matrix according to the second PMI, where the generating module 150 may generate multiple antenna port corresponding according to the first precoding matrix and the second precoding matrix. The precoding matrix, for example: The first precoding matrix and the second precoding matrix may be used as inputs of a Kronecker function, and the matrix outputted by the function may serve as a precoding matrix corresponding to a plurality of antenna ports. It should be noted that the first antenna port group may correspond to all antenna elements of a certain row in the antenna array, and the second antenna port group may correspond to other rows in the antenna array except the row corresponding to the first antenna port group. A sample antenna array for each line.

For example, in the embodiment of the present invention, the at least two antenna port groups may include a first antenna port group, a second antenna port group, and a third antenna port group, and the sending module 120 may pass the first antenna port group, the second An antenna port in the antenna port group and the third antenna port group transmits a reference signal for CSI measurement to the user equipment UE. The receiving module 130 may receive CSIs corresponding to the first antenna port group, the second antenna port group, and the third antenna port group respectively sent by the UE, where the CSI includes a first PMI corresponding to the first antenna port group, and a second a second PMI corresponding to the antenna port group and a third PMI corresponding to the third antenna port group. The obtaining module 140 may obtain the first precoding matrix according to the first PMI, acquire the second precoding matrix according to the second PMI, and acquire the third precoding matrix according to the third PMI, and the generating module 150 may be configured according to the first precoding matrix, a precoding matrix and a third precoding matrix are used to generate a precoding matrix corresponding to the plurality of antenna ports, for example: the first precoding matrix and the second precoding matrix may be used as inputs of a Kronecker function, and the matrix and the output of the function are The third precoding matrix is then used as an input to the Kronecker function, and the last output matrix can serve as a precoding matrix corresponding to multiple antenna ports. It should be noted that the first day The line port group may correspond to an antenna element in a first direction, the second antenna port group corresponds to an antenna element in a second direction, and the third antenna port group may correspond to an antenna frame in a third direction, and the first direction, The second direction and the third direction may be perpendicular to each other.

 Therefore, the base station provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives at least two antenna ports respectively included in the partial antenna port and fed back by the UE. The at least two PIMs corresponding to the group, and the precoding matrix corresponding to the multiple antenna ports are generated according to the at least two precoding matrices obtained by the at least two PMIs, which can solve the problem that when the overhead of the downlink pilots is occupied in a large-scale antenna system The problem of frequency resources, thus effectively increasing the throughput of the system.

 In the embodiment of the present invention, each of the at least two antenna port groups may correspond to a precoding codebook, that is, there are at least two precoding codebooks.

 It should be understood that, in the embodiment of the present invention, at least two precoding codebooks may be independent precoding codebooks, or may be partially identical precoding codebooks, that is, a precoding matrix has a part of precoding matrix. The embodiments of the present invention are not limited thereto.

 It should also be understood that, in the embodiment of the present invention, at least two antenna port groups refer to a logical port group for transmitting a reference signal, and the logical port group can be made to each through a mapping relationship with an antenna element in the antenna array. The logical port group corresponds to a portion of the antenna array in the antenna array. For example, the antenna ports in one logical port group may correspond to the antenna arrays arranged in the horizontal direction in the antenna array, and the other logical port group may correspond to the antenna arrays arranged in the vertical direction in the antenna array, but the embodiment of the present invention Not limited to this.

 It should also be understood that, in the embodiment of the present invention, the base station 100 also determines an antenna port in at least two antenna port groups for transmitting a reference signal by using a pre-agreed manner.

 Optionally, as an embodiment, the sending module 120 is further configured to send, to the UE, information of at least two antenna port groups and antenna port information of each antenna port group.

Specifically, the base station 100 may send information of at least two antenna port groups and antenna port information of each antenna port group to the UE, so that the UE according to the information of the at least two antenna port groups and the antenna port information of each antenna port group. The reference signal sent by the base station 100 for performing channel state information CSI measurement is received. In other words, the base station may notify the UE: which of the antenna ports selected by the base station to transmit the reference signal for performing CSI measurement, for example, may notify the UE: the identification information of the antenna port group selected by the base station and each Antennas in antenna port groups Identification information of the port.

 In the embodiment of the present invention, the antenna port information of each antenna port group may include port number information of the start end port of each antenna port group, that is, the port number and the end port including the start port of each antenna port group. The port number. For example: The antenna port information of an antenna port group includes: the port number of the starting port is 0, and the port number of the ending port is 2. Alternatively, in an embodiment, the antenna port information of each antenna port group may further include a port number of a start port of each antenna port group and K antenna ports subsequent to the start port, where K is A positive integer. For example: The antenna port information of an antenna port group includes: The port number of the starting port is 0 and the two ports after the starting port.

 The base station 100 can determine that the antenna port group corresponds to the antenna array arranged in the horizontal direction or the vertical direction in the antenna array by the mapping relationship between the antenna port group and the antenna element in the antenna array. For example, if the antenna of the base station 100 is a 6x8 antenna array, an antenna port group having a port number of 0 and 2 at the beginning end port respectively can correspond to any row antenna frame arranged horizontally in the antenna array. In other words, an antenna port group consisting of a port number of the originating port of 0 and two antenna ports after the start port may also correspond to any row of antenna elements arranged horizontally in the antenna array. It should be understood that the technical solutions of the embodiments of the present invention are not limited herein.

 Or, in the embodiment of the present invention, the antenna port information of each antenna port group may also include pattern information corresponding to the antenna port in each antenna port group, where the pattern information is used to indicate the identifier of the pattern of the at least two antenna port groups. , the pattern is used to indicate the antenna port in each antenna port group. For example: The pattern information corresponding to the antenna port in an antenna port group can be 0, 0 is used to indicate the antenna port in the antenna port group.

 It should be understood that the number of antenna ports and the initial end port number in each antenna port group may be changed, which is not limited in this embodiment of the present invention.

 Optionally, as another embodiment, the sending module 120 is specifically configured to send, by using UE-specific signaling or cell-specific signaling, information of at least two antenna port groups and antenna port information of each antenna port group to the UE.

In the embodiment of the present invention, the base station 100 may send the information of the at least two antenna port groups determined by the determining module 110 to the UE by using the UE-specific signaling, for example, the physical downlink control channel (PDCCH). Antenna port information of the antenna port group, or the base station 100 may pass cell specific signaling, for example: may be a paging channel (Paging Channel, PCH) transmits information of at least two antenna port groups determined by the determining module 110 and antenna port information of each antenna port group to the UE.

 Optionally, as another embodiment, the generating module 150 is specifically configured to generate a precoding matrix corresponding to multiple antenna ports by using a Kronecker function according to at least two precoding matrices. A code matrix, and the at least two precoding matrices can be used as inputs to a Kronecker function, and the output of the Kronecker function is a precoding matrix corresponding to a plurality of antenna ports. It should be understood that in the embodiment of the present invention, multiple antenna ports may include all antenna ports.

 Optionally, as an embodiment, the receiving module 130 receives, by the UE, the CSI corresponding to the at least two antenna port groups respectively, and may further include at least one rank corresponding to the at least one antenna port group of the at least two antenna port groups. Instructing the RI, where the obtaining module 140 is configured to obtain at least two precoding matrices by querying at least two precoding codebooks corresponding to the at least two antenna port groups respectively according to the at least two PMIs and the at least one RI. .

 In the embodiment of the present invention, the base station 100 receives the CSI corresponding to the at least one antenna port group that is fed back by the UE, including the PMI and the RI, where the RI corresponding to each antenna port group is used to indicate that the UE transmits the data stream through the antenna port group. The number of layers, that is, the number of columns indicating the precoding matrix corresponding to the antenna port group.

 Specifically, when the number of columns of the precoding matrix corresponding to one antenna port group is 1, it is a precoding vector. At this time, the CSI corresponding to the antenna port group fed back by the UE 100 receives only the PML.

 Optionally, as another embodiment, the at least two antenna port groups may include a horizontal antenna port group and a vertical antenna port group, and the determining module 110 is specifically configured to: antennas corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array The port is determined as a horizontal antenna port group, and the antenna port corresponding to at least one column antenna array arranged vertically in the antenna array is determined as a vertical antenna port group.

Specifically, the horizontal antenna port group may correspond to any one of the antenna arrays arranged in the horizontal direction of the antenna array, or may correspond to any two rows and three rows of antenna elements arranged in the horizontal direction of the antenna array, etc., and the present invention does not do this. limited. The vertical antenna port group may correspond to any array of antenna elements arranged in the vertical direction of the antenna array, or may correspond to any two 歹|J, three-column antenna arrays arranged in the vertical direction of the antenna array, etc., which is not limited by the present invention. . It should be noted that at least one line of the day The antenna port corresponding to the antenna element shared by the line matrix and the at least one column antenna frame may belong to the horizontal antenna port group, or may also belong to the vertical antenna port group.

 For example: When the horizontal antenna port group corresponds to any row of antenna elements arranged in the horizontal direction in the antenna array, the vertical antenna port group may correspond to the j-th column antenna array arranged in the vertical direction in the antenna array, and the vertical antenna port group may not include the horizontal The jth antenna element in the row of antennas corresponding to the antenna port group. Alternatively, when the vertical antenna port group corresponds to any column antenna array arranged in the vertical direction in the antenna array, the horizontal antenna port group may correspond to the ith row antenna array arranged in the horizontal direction in the antenna array, and the horizontal antenna port group may not include vertical The i-th antenna element of the column of antenna rows corresponding to the antenna port group, wherein i and j are integers greater than or equal to 1.

 Or, when the horizontal antenna port group corresponds to the first row and the first row arranged in the horizontal direction of the antenna array

In the case of all the antenna elements of the two rows, the vertical port group corresponds to any of the antenna elements arranged in the vertical direction in each of the plurality of rows 3, 5, 7 and the like in the antenna array, and the embodiment of the present invention is not limited thereto.

 Optionally, in another embodiment, the horizontal antenna port group corresponds to a row of antenna elements in the horizontal direction of the antenna array, and the vertical antenna port group corresponds to a column of antenna elements in the vertical direction of the antenna array, where the receiving module 130 is specifically used. Receiving, by the UE, a second RI and a second PMI for indicating a precoding matrix corresponding to the horizontal antenna port group, and receiving a first PMI sent by the UE for indicating a precoding matrix corresponding to the vertical antenna port group, The horizontal antenna port group corresponds to the second precoding codebook, and the vertical antenna port group corresponds to the first precoding codebook.

 Specifically, the horizontal antenna port group may correspond to any one of the antenna elements arranged in the horizontal direction in the antenna array, for example, may correspond to the first row antenna array in the antenna array, and the vertical antenna port group may correspond to the vertical direction in the antenna array. Any array of antenna elements, for example: may correspond to the first column of antenna elements in the antenna array, but does not include the first frame. The base station 100 receiving module 130 may receive the second RI and the second PMI fed back by the UE, where the second PMI and the second RI are used to jointly indicate a precoding matrix in the second precoding codebook corresponding to the horizontal antenna port group; The module 130 may further receive a first PMI fed back by the UE, where the first PMI is used to indicate a precoding matrix in the first precoding codebook corresponding to the vertical antenna port group. Since the vertical antenna port group corresponds to any one of the antenna elements in the vertical direction of the antenna array, the number of columns of the precoding matrix corresponding to the vertical antenna port group is 1, that is, the first RI is equal to 1, and therefore, The UE feeds back the information.

Therefore, the base station provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives at least two antenna ports respectively included in the partial antenna port and fed back by the UE. At least two PIMs corresponding to the group, and then according to the at least two The at least two precoding matrices obtained by the PMIs generate a precoding matrix corresponding to multiple antenna ports, which can solve the problem that the overhead of the downlink pilots in the large-scale antenna system occupies a large amount of time-frequency resources, thereby effectively increasing the throughput of the system. the amount.

 In addition, the horizontal antenna port group and the vertical antenna port group determined according to the arrangement of the antenna array can obtain additional diversity gain and improve the accuracy of channel estimation.

 Alternatively, as an embodiment, the at least two antenna port groups may further include two horizontal antenna port groups or two vertical antenna port groups.

 Optionally, as another embodiment, the at least two antenna port groups may also include a first antenna port group and a second antenna port group. The determining module 110 is specifically configured to: divide the antenna array into four sub-arrays of equal size, determine an antenna port corresponding to one of the four sub-arrays as the first antenna port group, and select the other three sub-arrays from the four sub-arrays The antenna ports corresponding to the three positions having the same position in the array are determined as the second antenna port group.

 Specifically, the antenna array may be divided into four sub-arrays, and the antenna elements in each sub-array are arranged in the same manner. For example, the 6×8 antenna array may be divided into four sub-arrays of 3×4, and the four sub-arrays of the three 3×4 are The antenna port corresponding to the 12 antenna elements in one is determined as the first antenna port group, and the i-th row and the j-th column in each of the other three 3x4 sub-arrays of the four 3×4 sub-arrays The antenna port corresponding to the position of the position is determined as the second antenna port group, that is: the second antenna port group corresponds to one of the other three sub-arrays, and the three antennas are in the three sub-arrays. The position is the same, where i takes values from 1 to 3, and j takes values from 1 to 4.

 It should be understood that, in the embodiment of the present invention, the first precoding codebook and the second precoding codebook may be different precoding codebooks, may be the same precoding codebook, or may be partially identical precoding. The codebook, but the embodiment of the invention is not limited thereto. Since the shape of the antenna array corresponding to the horizontal antenna port group and the vertical antenna port group may be different, using different precoding codebooks can provide better performance of the antenna port.

For example, in the embodiment of the present invention, the first precoding codebook may be:

其中， N_v表示垂直天线端口组对应的预编码码本中码字的个数， P表示 垂直天线端口组方向的过釆样系数； N_h表示水平天线端口组对应的预编码码 本中码字的个数。 )表示水平天线端口组中天线端口的个数； )表示垂直 天线端口组中天线端口的个数。 The second precoding codebook can be:

Where N _v represents the number of codewords in the precoding codebook corresponding to the vertical antenna port group, P represents the oversampled coefficient in the direction of the vertical antenna port group; N _h represents the code of the precoding codebook corresponding to the horizontal antenna port group The number of words. ) indicates the number of antenna ports in the horizontal antenna port group; ) indicates the number of antenna ports in the vertical antenna port group.

 It should be understood that, in the embodiments of the present invention, the base station 100 according to the embodiment of the present invention may correspond to an execution body of the method according to the embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the base station 100 are respectively The corresponding processes of the respective methods in FIG. 3 to FIG. 5 are implemented, and are not described herein again for brevity.

 Therefore, the base station provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives at least two antenna ports respectively included in the partial antenna port and fed back by the UE. The at least two PIMs corresponding to the group, and the precoding matrix corresponding to the multiple antenna ports are generated according to the at least two precoding matrices obtained by the at least two PMIs, which can solve the problem that when the overhead of the downlink pilots is occupied in a large-scale antenna system The problem of frequency resources, thus effectively increasing the throughput of the system.

 2 is a schematic block diagram of a user equipment 200 in accordance with one embodiment of the present invention. As shown in FIG. 2, the user equipment 200 includes: a determining module 210, a receiving module 220, and a sending module 230, where:

 The determining module 210 is configured to determine at least two antenna port groups, and the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports.

 The receiving module 220 is configured to receive, according to the antenna port in the at least two antenna port groups determined by the determining module 210, a reference signal sent by the base station for channel state information CSI measurement.

 The sending module 230 is configured to send CSI corresponding to the at least two antenna port groups to the base station according to the reference signal received by the receiving module 220, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups. .

Therefore, the user equipment provided by the embodiment of the present invention receives a reference signal for CSI measurement by using a part of antenna ports of a plurality of antenna ports, and feeds back to the base station at least two antenna ports respectively included in the part of the antenna ports. At least two PIMs corresponding to the group, and then receiving a PMI sent by the base station to indicate a precoding matrix corresponding to multiple antenna ports, can be solved in a large-scale day The overhead of the downlink pilot in the line system occupies a large amount of time-frequency resources, thereby effectively increasing the throughput of the system.

 Specifically, in the embodiment of the present invention, the user equipment 200 may determine, in a pre-agreed manner, an antenna port in at least two antenna port groups for receiving a reference signal sent by the base station, where the at least two antenna ports are required to be described. All antenna ports in the group are some of the multiple antenna ports. The user equipment 200 may receive, by using each of the at least two antenna port groups, a reference signal for CSI measurement sent by the base station, and feed back, to the base station, CSI corresponding to each antenna port group, where the CSI includes Indicates the PMI of the precoding matrix in the precoding codebook corresponding to each antenna port group.

 In the embodiment of the present invention, each of the at least two antenna port groups corresponds to one precoding codebook, that is, there are at least two precoding codebooks. The CSI fed back by the user equipment 200 to the base station corresponds to each antenna port group, and the UE feeds back at least two CSIs to the base station.

 It should be understood that, in the embodiment of the present invention, at least two antenna port groups are used to transmit a reference signal relationship, so that each logical port group corresponds to a part of the antenna elements in the antenna array. For example: one logic and the other logical port group may correspond to the antenna array arranged in the vertical direction in the antenna array, but the embodiment of the present invention is not limited thereto.

 It should also be understood that in the embodiment of the present invention, at least two precoding codebooks may be independent precoding codebooks. The at least two precoding codebooks may be the same precoding codebook, or may be different precoding codebooks, or may be partially identical precoding codebooks, that is, a precoding matrix has a part of the precoding matrix. The embodiments of the present invention are not limited thereto.

 Optionally, as an embodiment, the receiving module 220 is further configured to receive information about at least two antenna port groups sent by the base station and antenna port information of each antenna port group.

Specifically, the user equipment 200 may receive information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group, and the UE may use information according to the at least two antenna port groups and an antenna of each antenna port group. The port information receives a reference signal sent by the base station for performing channel state information CSI measurement. In other words, the user equipment can learn which antenna ports of the group of antenna ports are selected by the base station to send reference signals for performing CSI measurement, for example, the identification information of the antenna port group selected by the base station and each antenna port group can be known. Identification information of the antenna port in the middle. In the embodiment of the present invention, the antenna port information of each antenna port group may include port number information of the start end port of each antenna port group, that is, the port number and the end port including the start port of each antenna port group. The port number. For example: The antenna port information of an antenna port group includes: The port number of the starting port is 0, and the port number of the ending port is 2. Alternatively, in an embodiment, the antenna port information of each antenna port group may further include a port number of a start port of each antenna port group and K antenna ports subsequent to the start port, where K is A positive integer. For example: The antenna port information of an antenna port group includes: The port number of the starting port is 0 and 2 ports after the starting port.

 Or, in the embodiment of the present invention, the antenna port information of each antenna port group may also include pattern information corresponding to the antenna port in each antenna port group, where the pattern information is used to indicate the identifier of the pattern of the at least two antenna port groups. , the pattern is used to indicate the antenna port in each antenna port group. For example: The pattern information corresponding to the antenna port in an antenna port group can be 0, 0 is used to indicate the antenna port in the antenna port group.

 It should be understood that the number of antenna ports and the initial end port number in each antenna port group may be changed, which is not limited in this embodiment of the present invention.

 Optionally, as another embodiment, the receiving module 220 is specifically configured to: receive information about at least two antenna port groups sent by the base station, and antenna port information of each antenna port group by using UE-specific signaling or cell-specific signaling. .

 In the embodiment of the present invention, the user equipment 200 may receive the information of the at least two antenna port groups and each antenna port sent by the base station by using the UE-specific signaling, for example, the physical downlink control channel (PDCCH). The antenna port information of the group, or may be through cell-specific signaling, for example, may be a paging channel (Paging Channel, PCH), receiving information of at least two antenna port groups sent by the base station, and antenna port information of each antenna port group. .

 Optionally, as another embodiment, the CSI corresponding to the at least two antenna port groups sent by the sending module 230 to the base station may further include at least one corresponding to the at least one antenna port group of the at least two antenna port groups. The rank indicates RI.

In the embodiment of the present invention, the user equipment 200 feeds back the CSI corresponding to the at least one antenna port group to the base station, including the PMI and the RI, where the RI corresponding to each antenna port group is used to indicate that the UE transmits the data stream through the antenna port group. The number of layers, that is, the number of columns indicating the precoding matrix corresponding to the antenna port group. Specifically, when the number of columns of the precoding matrix corresponding to one antenna port group is 1, it is a precoding vector. At this time, the CSI corresponding to the antenna port group fed back by the user equipment 200 to the base station includes only PML.

 Optionally, as another embodiment, the at least two antenna port groups may include a horizontal antenna port group and a vertical antenna port group, and the determining module 210 is specifically configured to: antennas corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array The port is determined as a horizontal antenna port group, and the antenna port corresponding to at least one column antenna array arranged vertically in the antenna array is determined as a vertical antenna port group.

 Specifically, the horizontal antenna port group may correspond to any one of the antenna arrays arranged in the horizontal direction of the antenna array, or may correspond to any two rows and three rows of antenna elements arranged in the horizontal direction of the antenna array, etc., and the present invention does not do this. limited. The vertical antenna port group may correspond to any one of the antenna arrays arranged in the vertical direction of the antenna array, or may correspond to any two or three columns of antenna elements arranged in the vertical direction of the antenna array, etc., which is not limited by the present invention. It should be noted that the antenna port corresponding to the antenna array shared by at least one antenna array and at least one column antenna array may belong to the horizontal antenna port group, or may also belong to the vertical antenna port group.

 For example: When the horizontal antenna port group corresponds to any row of antenna elements arranged in the horizontal direction in the antenna array, the vertical antenna port group may correspond to the j-th column antenna array arranged in the vertical direction in the antenna array, and the vertical antenna port group may not include the horizontal The jth antenna element of the row of antennas corresponding to the antenna port group, where j is an integer greater than or equal to 1.

 Or, when the horizontal antenna port group corresponds to the first row and the first row arranged in the horizontal direction of the antenna array

In the case of all the antenna elements of the two rows, the vertical port group may correspond to any of the antenna elements arranged in the vertical direction of each of the plurality of rows 3, 5, 7, etc. in the antenna array, and the embodiment of the present invention is not limited thereto.

 Optionally, in another embodiment, the horizontal antenna port group corresponds to a row of antenna elements in the horizontal direction of the antenna array, and the vertical antenna port group corresponds to a column of antenna elements in the vertical direction of the antenna array, where the sending module 230 is specifically used. Transmitting, to the base station, a second RI and a second PMI for indicating a precoding matrix corresponding to the horizontal antenna port group, and transmitting, to the base station, a first PMI for indicating a precoding matrix corresponding to the vertical antenna port group, where The horizontal antenna port group corresponds to the second precoding codebook, and the vertical antenna port group corresponds to the first precoding codebook.

Specifically, the horizontal antenna port group may include any one of the antenna elements arranged in the horizontal direction in the antenna array, for example, may correspond to the first row of antenna elements in the antenna array, and the vertical antenna port group may include any column in the vertical direction of the antenna array. Antenna array, for example: can correspond to the antenna array The first column of antennas in the column, but does not include the first. The sending module 230 of the user equipment 200 may feed back a second RI and a second PMI to the base station, where the second PMI and the second RI are used to jointly indicate a precoding matrix in the second precoding codebook corresponding to the horizontal antenna port group; The sending module 230 may also feed back a first PMI to the base station, where the first PMI is used for a precoding matrix in the first precoding codebook corresponding to the vertical antenna port group. Since the vertical port group corresponds to any one of the antenna elements in the vertical direction of the antenna array, the number of columns of the precoding matrix corresponding to the vertical antenna port group is 1, that is, the first RI is equal to 1, and therefore, UE feedback is not required. The information.

 It should be understood that, in the embodiment of the present invention, the first precoding codebook and the second precoding codebook may be different precoding codebooks, may be the same precoding codebook, or may be partially identical precoding. The codebook, but the embodiment of the invention is not limited thereto.

 Alternatively, as an embodiment, the at least two antenna port groups may further include two horizontal antenna port groups or two vertical antenna port groups.

 Optionally, as another embodiment, the at least two antenna port groups may also include a first antenna port group and a second antenna port group, and the determining module 210 is specifically configured to: divide the antenna array into four sub-arrays of equal size, Determining an antenna port corresponding to one of the four sub-arrays as a first antenna port group, and determining an antenna port corresponding to three arrays of the same position from the other three sub-arrays in the four sub-arrays Two antenna port groups.

 Specifically, the antenna array may be divided into four sub-arrays, and the antenna elements in each sub-array are arranged in the same manner. For example, the 6×8 antenna array may be divided into four sub-arrays of 3×4, and the four sub-arrays of the three 3×4 are A corresponding antenna port is determined as a first antenna port group, and an antenna corresponding to an array at an i-th row and a j-column position in each of the other three 3x4 sub-arrays of the four 3×4 sub-arrays The port is determined to be a second antenna port group, that is: the second antenna port group corresponds to one of each of the three sub-arrays except the one of the four sub-arrays corresponding to the first antenna port group of the four 3x4 sub-arrays Samples, where i takes values from 1 to 3, and j takes values from 1 to 4.

 Optionally, as another embodiment, the user equipment 200 further includes:

 The obtaining module 240 is configured to obtain a CSI measurement result, determine a precoding matrix corresponding to each antenna port group of the at least two antenna port groups according to the CSI measurement result, and perform quantization on the precoding matrix according to the quantization result of the precoding matrix. , get CSI.

Specifically, in the embodiment of the present invention, after receiving, by the receiving module 220, the receiving module 220 receives the reference signal for CSI measurement sent by the base station according to the antenna port in the at least two antenna port groups, The obtaining module 240 obtains a CSI measurement result of the CSI measurement by the user equipment 200 according to the reference signal, and determines a precoding matrix corresponding to each antenna port group of the at least two antenna port groups according to the CSI measurement result, and quantizes the precoding matrix. And obtaining CSI according to the quantization result, where the CSI includes PMI and/or RI.

 It should be understood that in an embodiment of the present invention, user equipment 200 according to an embodiment of the present invention may correspond to an execution subject of a method according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in user equipment 200 In order to implement the corresponding processes of the respective methods in FIG. 3 to FIG. 5, for brevity, details are not described herein again.

 Therefore, the user equipment provided by the embodiment of the present invention receives a reference signal for CSI measurement by using a part of antenna ports of a plurality of antenna ports, and feeds back to the base station at least two antenna ports respectively included in the part of the antenna ports. The PMI corresponding to the at least two PIMs of the group and the PMI sent by the base station to indicate the precoding matrix corresponding to the multiple antenna ports can solve the problem that the overhead of the downlink pilots in the large-scale antenna system occupies a large amount of time-frequency resources, thereby Effectively increase the throughput of the system.

 3 is a schematic flow diagram of a method 300 of generating a precoding matrix CSI, in accordance with one embodiment of the present invention. The method 300 can be performed by a base station. As shown in FIG. 3, the method 300 includes:

310. The base station determines at least two antenna port groups, and the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports.

 320. The base station sends a reference signal for CSI measurement to the user equipment UE according to the antenna port in the at least two antenna port groups.

 330. The base station receives CSI corresponding to the at least two antenna port groups respectively sent by the UE according to the reference signal, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups.

 340. The base station separately acquires at least two precoding matrices according to the received at least two PMIs. 350. The base station generates a precoding matrix corresponding to multiple antenna ports according to the obtained at least two precoding matrices.

Therefore, the method for generating a precoding matrix provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives the feedback of the UE and the part of the antenna port respectively At least two PIMs corresponding to at least two antenna port groups, and at least two precoding matrices obtained by the at least two PMIs generate precoding matrices corresponding to multiple antenna ports, which can solve downlink pilots in a large-scale antenna system. The overhead of taking up a lot The problem of time-frequency resources, thus effectively increasing the throughput of the system.

 Specifically, in the embodiment of the present invention, the base station may determine at least two antenna port groups according to the arrangement manner of the antenna array, and it is required that all antenna ports in the at least two antenna port groups are among multiple antenna ports of the base station. Part of the antenna port. The base station may send a reference signal for CSI measurement to the UE through each of the at least two antenna port groups, and receive CSI corresponding to each antenna port group fed back by the UE, where the CSI includes The PMI of the precoding matrix in the precoding codebook corresponding to each antenna port group. The base station may obtain at least two precoding matrices by querying at least two precoding codebooks corresponding to the at least two antenna port groups respectively according to at least two PMIs. Further, based on the acquired at least two precoding matrices, a precoding matrix corresponding to the plurality of antenna ports is generated. For the base station 100 shown in FIG. 1 , for the sake of brevity of description, the corresponding execution process in the embodiment of the present invention is not described herein again.

 In the embodiment of the present invention, each of the at least two antenna port groups corresponds to one precoding codebook, that is, there are at least two precoding codebooks.

 It should be understood that, in the embodiment of the present invention, at least two precoding codebooks may be independent precoding, which are different precoding codebooks, and may also be partially identical precoding codebooks, that is, the precoding codebook has A part of the precoding matrix is the same, which is not limited by the embodiment of the present invention.

 It should also be understood that, in the embodiment of the present invention, at least two antenna port groups refer to a logical port group for transmitting a reference signal, and the logical port group can be made to each through a mapping relationship with an antenna element in the antenna array. The logical port group corresponds to a portion of the antenna array in the antenna array. For example, the antenna ports in one logical port group may correspond to the antenna arrays arranged in the horizontal direction in the antenna array, and the other logical port group may correspond to the antenna arrays arranged in the vertical direction in the antenna array, but the embodiment of the present invention Not limited to this.

 It should also be understood that, in the embodiment of the present invention, the base station also determines an antenna port in the at least two antenna port groups for transmitting the reference signal by using a pre-agreed manner.

 Optionally, as an embodiment, the method 300 may further include: the base station transmitting information of the at least two antenna port groups and antenna port information of each antenna port group to the UE.

Specifically, the base station may send information of at least two antenna port groups and antenna port information of each antenna port group to the UE, so that the UE according to the information of at least two antenna port groups and each day The antenna port information of the line port group receives a reference signal sent by the base station for performing channel state information CSI measurement. In other words, the base station can notify the UE to select which of the antenna ports of the antenna ports to transmit the reference signals for CSI measurement, for example, can notify the UE of the selected antenna port group identification information and each antenna port group. Identification information of the antenna port in the middle.

 In the embodiment of the present invention, the antenna port information of each antenna port group may include port number information of the start end port of each antenna port group, that is, the port number and the end port including the start port of each antenna port group. The port number. For example: The antenna port information of an antenna port group includes: the port number of the starting port is 0, and the port number of the ending port is 2. Alternatively, in an embodiment, the antenna port information of each antenna port group may further include a port number of a start port of each antenna port group and K antenna ports subsequent to the start port, where K is A positive integer. For example: The antenna port information of an antenna port group includes: The port number of the starting port is 0 and the two ports after the starting port.

 The base station can determine, by the mapping relationship between the antenna port group and the antenna element in the antenna array, that the antenna port group corresponds to the antenna array arranged in the horizontal direction or in the vertical direction in the antenna array. For example, if the antenna of the base station is a 6x8 antenna array, the antenna port group with port numbers 0 and 2 at the beginning end port respectively can correspond to any row antenna array arranged horizontally in the antenna array. In other words, an antenna port group consisting of a port number of the start port of 0 and two antenna ports after the start port may also correspond to any one of the antenna arrays arranged horizontally in the antenna array. It should be understood that the technical solutions of the embodiments of the present invention are not limited herein.

 Or, in the embodiment of the present invention, the antenna port information of each antenna port group may also include pattern information corresponding to the antenna port in each antenna port group, where the pattern information is used to indicate the identifier of the pattern of the at least two antenna port groups. , the pattern is used to indicate the antenna port in each antenna port group. For example: The pattern information corresponding to the antenna port in an antenna port group can be 0, 0 is used to indicate the antenna port in the antenna port group.

 It should be understood that the number of antenna ports and the initial end port number in each antenna port group may be changed, which is not limited in this embodiment of the present invention.

 Optionally, as another embodiment, the sending, by the base station, the antenna port group information to the UE includes: sending, by using UE-specific signaling or cell-specific signaling, information of the at least two antenna port groups and each antenna port group to the UE. Antenna port information.

In the embodiment of the present invention, the base station may adopt UE-specific signaling, for example: may be physical The Physical Downlink Control Channel (PDCCH) sends the information of the at least two antenna port groups determined by the base station and the antenna port information of each antenna port group to the UE, or may be through cell-specific signaling, for example: The paging channel (PCH) transmits information of at least two antenna port groups determined by the base station and antenna port information of each antenna port group to the UE.

 Optionally, as another embodiment, the base station generates a precoding matrix corresponding to the multiple antenna ports according to the at least two precoding matrices, including: using a Kronecker function according to at least two precoding matrices. A precoding matrix corresponding to multiple antenna ports is generated. Array, and the at least two precoding matrices can be used as input to the Kronecker function, and the output of the Bayer J Jronecker function is a precoding matrix corresponding to multiple antenna ports. It should be understood that in the embodiment of the present invention, multiple antenna ports may include all antenna ports.

 Optionally, as another embodiment, the CSI further includes at least one rank indication RI corresponding to at least one antenna port group of the at least two antenna port groups, where, according to the at least two PMIs, at least two precoding matrices are obtained. The method includes: obtaining, according to the at least two PMIs and the at least one RI, at least two precoding matrices by separately querying at least two precoding codebooks corresponding to the at least two antenna port groups.

 In the embodiment of the present invention, the CSI corresponding to the at least one antenna port group that is received by the base station, including the PMI and the RI, is configured, where the RI corresponding to each antenna port group is used to indicate that the UE transmits the data stream through the antenna port group. The number indicates the number of columns of the precoding matrix corresponding to the antenna port group.

 Specifically, when the number of columns of the precoding matrix corresponding to one antenna port group is 1, it is a precoding vector. At this time, the CSI corresponding to the antenna port group fed back by the base station receiving the UE only includes the PMI.

 Optionally, as another embodiment, the at least two antenna port groups determined by the base station may include a horizontal antenna port group and a vertical antenna port group, and determining at least two antenna port groups includes: arranging at least two horizontal rows in the antenna array The antenna ports corresponding to one row of antenna elements are determined as horizontal antenna port groups, and the antenna ports corresponding to at least one column of antenna elements arranged in the vertical direction in the antenna array are determined as vertical antenna port groups.

Specifically, the horizontal antenna port group may correspond to any one of the antenna arrays arranged in the horizontal direction of the antenna array, or may correspond to any two rows and three rows of antenna elements arranged in the horizontal direction of the antenna array, etc., and the present invention does not do this. limited. The vertical antenna port group can correspond to the vertical direction in the antenna array The array of antennas in any of the arrays may be corresponding to antenna arrays of any two 歹|J, three-column antenna ports arranged in the vertical direction of the antenna array, which is not limited by the present invention. It should be noted that the antenna port corresponding to the antenna array shared by at least one row of antenna elements and at least one column of antenna elements may belong to the horizontal antenna port group, or may also belong to the vertical antenna port group.

 For example: When the horizontal antenna port group corresponds to any row of antenna elements arranged in the horizontal direction in the antenna array, the vertical antenna port group corresponds to the j-th column antenna array arranged in the vertical direction in the antenna array, and the vertical antenna port group may not include the horizontal antenna The jth antenna element in the row of antennas corresponding to the port group. Alternatively, when the vertical antenna port group corresponds to any column antenna array arranged in the vertical direction in the antenna array, the horizontal antenna port group may correspond to the ith row antenna array arranged in the horizontal direction in the antenna array, and the horizontal antenna port group may not include vertical The i-th antenna element of the column of antenna rows corresponding to the antenna port group, wherein i and j are integers greater than or equal to 1.

 Alternatively, when the horizontal antenna port group corresponds to all the antenna elements of the 1st row and the 2nd row arranged in the horizontal direction in the antenna array, the vertical port group corresponds to each of the 3rd, 5th, 7th, etc. rows in the antenna array The embodiment of the present invention is not limited to any antenna array arranged in the vertical direction.

 Optionally, in another embodiment, the horizontal antenna port group includes a row of antenna elements in a horizontal direction in the antenna array, and the vertical antenna port group includes a column of antenna elements in a vertical direction in the antenna array, where, in 330, the base station receives the UE to send And a second RI and a second PMI for indicating a precoding matrix corresponding to the horizontal antenna port group, and receiving a first PMI sent by the UE for indicating a precoding matrix corresponding to the vertical antenna port group, where the horizontal antenna port The group corresponds to the second precoding codebook, and the vertical antenna port group corresponds to the first precoding codebook.

 Specifically, the horizontal antenna port group may include any one of the antenna elements arranged in the horizontal direction in the antenna array, for example, may correspond to the first row of antenna elements in the antenna array, and the vertical antenna port group may include any column in the vertical direction of the antenna array. The antenna element, for example: may correspond to the first column antenna frame in the antenna array, but does not include the first frame. The base station 100 may receive the second RI and the second PMI fed back by the UE, where the second PMI and the second RI are used to jointly indicate a precoding matrix in the second precoding codebook corresponding to the horizontal antenna port group; the base station may also receive The first PMI fed back by the UE, the first PMI is used to indicate a precoding matrix in the first precoding codebook corresponding to the vertical antenna port group. Since the vertical antenna port group corresponds to any one of the antenna elements in the vertical direction of the antenna array, the number of columns of the precoding matrix corresponding to the vertical antenna port group is 1, that is, the first RI is equal to 1, and therefore, the UE is not required. Feedback this information.

Therefore, the method for generating a precoding matrix provided by the embodiment of the present invention, by using multiple antennas A part of the antenna ports in the port sends a reference signal for CSI measurement to the UE, and receives at least two corresponding to the at least two antenna port groups included in the part of the antenna ports that are fed back by the UE respectively.

The PIM, where the at least two precoding matrices obtained by the at least two PMIs generate a precoding matrix corresponding to multiple antenna ports, can solve the problem that the overhead of the downlink pilots in the large-scale antenna system occupies a large amount of time-frequency resources, thereby Effectively increase the throughput of the system.

 In addition, the horizontal antenna port group and the vertical antenna port group determined according to the arrangement of the antenna array can obtain additional diversity gain and improve the accuracy of channel estimation.

 Optionally, as another embodiment, the at least two antenna port groups may also include a first antenna port group and a second antenna port group. Determining at least two antenna port groups, including: dividing the antenna array into four sub-arrays of equal size, determining antenna ports corresponding to one of the four sub-arrays as the first antenna port group, and from the four sub-arrays The antenna ports corresponding to the three positions in which the one of the other three sub-arrays are the same are determined as the second antenna port group.

 Specifically, the antenna array may be divided into four sub-arrays, and the antenna elements in each sub-array are arranged in the same manner. For example, the 6×8 antenna array may be divided into four sub-arrays of 3×4, and the four sub-arrays of the three 3×4 are The antenna port corresponding to the 12 antenna elements in one is determined as the first antenna port group, and the i-th row and the j-th column in each of the other three 3x4 sub-arrays of the four 3×4 sub-arrays The antenna port corresponding to the position of the position is determined as the second antenna port group, that is: the second antenna port group corresponds to one of the other three sub-arrays, and the three antennas are in the three sub-arrays. The position is the same, where i takes values from 1 to 3, and j takes values from 1 to 4.

 It should be understood that, in the embodiment of the present invention, the first precoding codebook and the second precoding codebook may be different precoding codebooks, may be the same precoding codebook, or may be partially identical precoding. The codebook, but the embodiment of the invention is not limited thereto. Since the shape of the antenna array corresponding to the horizontal antenna port group and the vertical antenna port group may be different, using different precoding codebooks can provide better performance of the antenna port.

 For example, in the embodiment of the present invention, the first precoding codebook may be:

其中， N_v表示垂直天线端口组对应的预编码码本中码字的个数， P表示 垂直天线端口组方向的过釆样系数； N_h表示水平天线端口组对应的预编码码 本中码字的个数。 )表示水平天线端口组中天线端口的个数； )表示垂直 天线端口组中天线端口的个数。 The second precoding codebook can be:

Where N _v represents the number of codewords in the precoding codebook corresponding to the vertical antenna port group, P represents the oversampled coefficient in the direction of the vertical antenna port group; N _h represents the code of the precoding codebook corresponding to the horizontal antenna port group The number of words. ) indicates the number of antenna ports in the horizontal antenna port group; ) indicates the number of antenna ports in the vertical antenna port group.

 Therefore, the method for generating a precoding matrix provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives the feedback of the UE and the part of the antenna port respectively At least two PIMs corresponding to at least two antenna port groups, and at least two precoding matrices obtained by the at least two PMIs generate precoding matrices corresponding to multiple antenna ports, which can solve downlink pilots in a large-scale antenna system. The overhead consumes a lot of time-frequency resources, thereby effectively increasing the throughput of the system.

 It should be understood that, in the embodiments of the present invention, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the execution order of each process should be determined by its function and internal logic, and should not be implemented in the embodiments of the present invention. The process constitutes any limitation.

 4 is a schematic flow diagram of a method 400 of generating a precoding matrix CSI, in accordance with another embodiment of the present invention. The method 400 can be performed by a user equipment UE, as shown in FIG. 4, the method 400 includes:

 410. The user equipment UE determines at least two antenna port groups, and the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports.

 420. The UE receives, according to the antenna port in the at least two antenna port groups, a reference signal sent by the base station for channel state information CSI measurement.

 430. The UE sends CSI corresponding to the at least two antenna port groups to the base station according to the reference signal, where the CSI includes at least two precoding matrix indication PML corresponding to the at least two antenna port groups.

Therefore, the method for generating a precoding matrix according to an embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives at least feedback from the UE and the part of the antenna port. Having at least two PIMs corresponding to the two antenna port groups, and generating a precoding matrix corresponding to the plurality of antenna ports according to the at least two precoding matrices obtained by the at least two PMIs, which can solve the downlink prediction in the large-scale antenna system Frequency overhead takes up a lot of time and frequency The problem of resources, thus effectively increasing the throughput of the system.

 Specifically, in the embodiment of the present invention, the user equipment UE may determine, in a pre-agreed manner, an antenna port in the at least two antenna port groups for receiving the reference signal sent by the base station, where the at least two antenna ports are required to be described. All antenna ports in the group are part of the antenna arrays. The UE may receive, by using each of the at least two antenna port groups, a reference signal for CSI measurement sent by the base station, and feed back, to the base station, CSI corresponding to each antenna port group, where the CSI includes The PMI of the precoding matrix in the precoding codebook corresponding to each antenna port group.

 In the embodiment of the present invention, each of the at least two antenna port groups corresponds to one precoding codebook, that is, there are at least two precoding codebooks. The CSI fed back to the base station by the UE corresponds to each antenna port group, and the UE feeds back at least two CSIs to the base station.

 It should be understood that, in the embodiment of the present invention, at least two antenna port groups are used to transmit a reference signal relationship, so that each logical port group corresponds to a part of the antenna elements in the antenna array. For example: one logic and the other logical port group may correspond to the antenna array arranged in the vertical direction in the antenna array, but the embodiment of the present invention is not limited thereto.

 It should also be understood that, in the embodiment of the present invention, at least two precoding codebooks may be independent precoding to be different precoding codebooks, or may be partially identical precoding codebooks, that is, precoding codebooks. A part of the precoding matrix is the same, which is not limited by the embodiment of the present invention.

 Optionally, the method 400 may further include: receiving, by the UE, information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group.

 Specifically, the UE may receive information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group, and the UE may receive according to information of at least two antenna port groups and antenna port information of each antenna port group. A reference signal sent by the base station for performing channel state information CSI measurement. In other words, the user equipment can learn which antenna ports of the group of antenna ports are selected by the base station to send reference signals for performing CSI measurement, for example, the identification information of the antenna port group selected by the base station and each antenna port group can be known. Identification information of the antenna port in the middle.

In the embodiment of the present invention, the antenna port information of each antenna port group may include port number information of the start end port of each antenna port group, that is, the end of the start port including each antenna port group. The port number of the slogan and end port. The antenna port information of each antenna port group may also include pattern information corresponding to the antenna port in each antenna port group, and the pattern information is used to indicate the identifier of the pattern of at least two antenna port groups, and the pattern is used to indicate each antenna. The antenna port in the port group.

 It should be understood that the pattern information corresponding to the antenna port in each antenna port group may correspond to the identification information of the antenna element. It should be understood that the number of the antenna ports and the initial port number in each antenna port group may be changed, which is not limited in this embodiment of the present invention.

 Optionally, as another embodiment, the UE receives the information of the at least two antenna port groups sent by the base station and the antenna port information of each antenna port group, including: receiving by using UE-specific signaling or cell-specific signaling. Information of at least two antenna port groups transmitted by the base station and antenna port information of each antenna port group.

 In the embodiment of the present invention, the UE may receive information of at least two antenna port groups sent by the base station and each antenna port group by using UE-specific signaling, for example, may be a Physical DownHfik Control Chamid (PDCCII). The antenna port information may be, or may be, by using cell-specific signaling, for example, the paging channel (Paging Channel, PCH) may receive information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group.

 Optionally, as an embodiment, the CSI corresponding to the at least two antenna port groups sent by the UE to the base station further includes at least one rank indication RI corresponding to at least one antenna port group of the at least two antenna port groups.

 In the embodiment of the present invention, the UE feeds back, to the base station, the CSI corresponding to the at least one antenna port group, including the PMI and the RI, where the RI corresponding to each antenna port group is used to indicate the number of layers of the data stream transmitted by the UE through the antenna port group. , that is, the number of columns indicating the precoding matrix corresponding to the antenna port group.

 Optionally, as another embodiment, the at least two antenna port groups determined by the UE may include a horizontal antenna port group and a vertical antenna port group, and determining at least two antenna port groups includes: arranging at least two horizontal rows in the antenna array The antenna ports corresponding to one row of antenna elements are determined as horizontal antenna port groups, and the antenna ports corresponding to at least one column of antenna elements arranged in the vertical direction in the antenna array are determined as vertical antenna port groups.

 Alternatively, as an embodiment, the at least two antenna port groups may further include two horizontal antenna port groups or two vertical antenna port groups.

Optionally, in another embodiment, the horizontal antenna port group corresponds to one row of antenna elements in the horizontal direction of the antenna array, and the vertical antenna port group corresponds to one column of antenna elements in the vertical direction of the antenna array, wherein, in 430, the UE The base station sends a pre-received indication corresponding to the horizontal antenna port group Encoding a second RI and a second PMI of the matrix, and transmitting, to the base station, a first PMI for indicating a precoding matrix corresponding to the horizontal antenna port group, wherein the horizontal antenna port group corresponds to the second precoding codebook, the vertical antenna The port group corresponds to the first pre-encoded codebook.

 Optionally, as another embodiment, the at least two antenna port groups determined by the UE may include a first antenna port group and a second antenna port group, and determining at least two antenna port groups, including: dividing the antenna array into equal sizes Four sub-arrays, the antenna ports corresponding to one of the four sub-arrays are determined as the first antenna port group, and three positions corresponding to one frame are selected from the other three sub-arrays in the four sub-arrays The antenna port is determined to be a second antenna port group.

 Optionally, as another embodiment, before transmitting the CSI corresponding to the at least two antenna port groups to the base station according to the reference signal, the method 400 further includes: the UE acquiring the CSI measurement result; the base UE according to the CSI measurement result. Determining a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, and performing quantization on the precoding matrix; the UE acquiring the CSI according to the quantization result of the precoding matrix.

 In the embodiment of the present invention, after receiving the reference signal for CSI measurement sent by the base station according to the antenna port in the at least two antenna port groups, the UE obtains the CSI measurement result of the CSI measurement performed by the UE according to the reference signal, and according to the The CSI measurement determines a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, quantizes the precoding matrix, and obtains CSI according to the quantization result, where the CSI includes PMI and/or RI.

Specifically, the at least two antenna port groups may include: a horizontal antenna port group corresponding to the first row antenna frame in the antenna array and a first column antenna frame corresponding to the antenna array, and the first column antenna frame does not include The vertical antenna port group for the first time. The UE may receive a reference signal for CSI measurement according to the antenna port in the vertical antenna port group, and obtain a CSI measurement result corresponding to the vertical antenna port group, for example, may be a channel matrix H1, and then according to an antenna in the horizontal antenna port group. The port receives the reference signal for the CSI measurement, and obtains the CSI measurement result corresponding to the horizontal antenna port group, for example: may be the channel matrix H2. The UE may determine two precoding matrices according to HI and H2. For example, the UE may perform singular value SVD or eigenvalue EVD decomposition on HI and H2 to obtain a precoding matrix. For example, EVD decomposition is performed on HI, namely: [D _P UJ = EVD (Hj, the precoding vector precoding matrix Ul(:, l) can be obtained, and the precoding vector precoding vector Ul(:, l) is quantized. And searching, according to the quantized U1(:, l), the first precoding codebook to obtain a first PMI for indicating a precoding matrix corresponding to the vertical antenna port group. Performing EVD decomposition on H2, namely: [D ₂ , U ₂ ] = EVD(H ₂ ), the precoding vector precoding matrix U2(:, l :r) can be obtained, and the precoding direction is The quantity precoding matrix U2(:, l:r) is quantized, and according to the quantized U2(:, l:r), the second precoding codebook is searched to obtain a pre-matrix matrix for indicating the corresponding horizontal antenna port group. Second PMI and second RI.

 Therefore, the method for generating a precoding matrix according to an embodiment of the present invention, by using a part of antenna ports of a plurality of antenna ports, receives a reference signal sent by a base station for CSI measurement, and feeds back to the base station and at least includes the part of the antenna port. At least two PIMs corresponding to the two antenna port groups, and then receiving the PMI sent by the base station to indicate the precoding matrix corresponding to the multiple antenna ports, can solve the problem that the downlink pilot resources occupy a large amount of time-frequency resources in the large-scale antenna system. The problem, thus effectively increasing the throughput of the system.

 It should be understood that, in the embodiments of the present invention, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the execution order of each process should be determined by its function and internal logic, and should not be implemented in the embodiments of the present invention. The process constitutes any limitation.

 The method for generating a precoding matrix according to an embodiment of the present invention is described above with reference to FIG. 3 and FIG. 4 from the perspective of a base station and a user equipment, respectively. A method for generating a precoding matrix according to an embodiment of the present invention will be further described below with reference to FIG.

 FIG. 5 is a schematic flow diagram of a method 500 of generating a precoding matrix CSI, in accordance with another embodiment of the present invention. As shown in FIG. 5, the method 500 includes:

 510. The base station determines at least two antenna port groups for transmitting a reference signal, where all of the at least two antenna port groups are part of the plurality of antenna ports.

 515. The base station sends antenna port group information to the user equipment UE, where the antenna port group information includes information of at least two antenna port groups and antenna port information of each antenna port group.

 520. The UE receives antenna port group information sent by the base station.

 525. The base station sends a reference signal for channel state information CSI measurement to the UE by using an antenna port in the at least two antenna port groups.

 530. The UE receives the reference signal sent by the base station in 525 according to the content of the antenna port group information received in 520, and performs corresponding downlink CSI measurement on the at least two antenna port groups according to the received reference signal.

 535. The UE determines, according to the CSI measurement result corresponding to the at least two antenna port groups, at least two precoding matrices corresponding to the at least two antenna port groups, and quantizes the at least two precoding matrices to obtain a quantized manner. At least two precoding matrices.

540. The UE acquires the at least two according to at least two precoding matrices quantized in 535. 545. The UE feeds back, to the base station, the RI and/or PML of the at least two precoded codebooks acquired in 540.

 550. The base station determines, according to the RI and/or PMI of the at least two precoding codebooks fed back by the UE in 545, at least two precoding matrices respectively corresponding to the at least two antenna port groups.

 555. The base station generates a precoding matrix corresponding to multiple antenna ports according to at least two precoding matrices determined in 545.

 Therefore, the method for generating a precoding matrix provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives the feedback of the UE and the part of the antenna port respectively At least two PIMs corresponding to at least two antenna port groups, and at least two precoding matrices obtained by the at least two PMIs generate precoding matrices corresponding to multiple antenna ports, which can solve downlink pilots in a large-scale antenna system. The overhead consumes a lot of time-frequency resources, thereby effectively increasing the throughput of the system.

 It should be understood that, in the embodiments of the present invention, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the execution order of each process should be determined by its function and internal logic, and should not be implemented in the embodiments of the present invention. The process constitutes any limitation.

 FIG. 6 is a schematic block diagram of a base station 600 in accordance with another embodiment of the present invention. As shown in FIG. 6, the base station 600 includes a processor 610, a memory 620, a receiver 630, a transmitter 640, and a bus 650. The processor 610, the memory 620, the receiver 630, and the transmitter 640 are connected by a bus system 650 for storing instructions, and the processor 610 is configured to execute instructions stored by the memory 620. among them,

 The processor 610 is configured to: determine at least two antenna port groups, and the antenna ports of the at least two antenna port groups are part of the plurality of antenna ports.

The transmitter 640 is configured to: send, according to the antenna port in the at least two antenna port groups determined by the processor 610, a reference signal for channel state information CSI measurement to the user equipment _UE .

 The receiver 630 is configured to: receive CSI corresponding to the at least two antenna port groups respectively sent by the UE according to the reference signal sent by the transmitter 640, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups. .

 The processor 610 is further configured to: obtain, according to the at least two PMIs received by the receiver 630, at least two precoding matrices, and generate a precoding matrix corresponding to the multiple antenna ports according to the at least two precoding matrices.

Therefore, the base station provided by the embodiment of the present invention utilizes a part of antennas of multiple antenna ports by using Transmitting, by the port, a reference signal for CSI measurement to the UE, and receiving, by the UE, at least two PIMs respectively corresponding to the at least two antenna port groups included in the part of the antenna ports, and then acquiring at least two PIMs according to the at least two PMIs. The precoding matrix generates a precoding matrix corresponding to multiple antenna ports, which can solve the problem that the overhead of the downlink pilots in the large-scale antenna system occupies a large amount of time-frequency resources, thereby effectively increasing the throughput of the system.

 It should be understood that, in the embodiment of the present invention, the processor 610 may be a central processing unit (CPU), and the processor 610 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

 The memory 620 can include read only memory and random access memory and provides instructions and data to the processor 610. A portion of memory 620 may also include non-volatile random access memory. For example, the memory 620 can also store information of the device type.

 The bus system 650 may include a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 650 in the figure.

 In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in the form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art. The storage medium is located in the memory 620. The processor 610 reads the information in the memory 620 and combines the hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.

 Optionally, as an embodiment, the transmitter 640 is further configured to: send information of at least two antenna port groups and antenna port information of each antenna port group to the UE.

 Optionally, as another embodiment, the antenna port information of each antenna port group sent by the transmitter 640 includes: port number information of a start end port of each antenna port group, or an antenna port corresponding to each antenna port group. Pattern information, the pattern information is used to indicate an identifier of a pattern of at least two antenna port groups, the pattern being used to indicate an antenna port in each antenna port group.

Optionally, as another embodiment, the transmitter 640 is specifically configured to: send, by using UE-specific signaling or cell-specific signaling, information of at least two antenna port groups and each antenna port group to the UE. Antenna port information.

 Optionally, as another embodiment, the processor 610 is specifically configured to: generate, according to at least two precoding matrices, a precoding matrix corresponding to multiple antenna ports by using a Kronecker function.

 Optionally, as an embodiment, the CSI corresponding to the at least two antenna port groups sent by the UE received by the receiver 630 further includes at least one rank corresponding to at least one antenna port group of the at least two antenna port groups. Instructing the RI, where the processor 610 is configured to: obtain at least two precoding matrices by querying at least two precoding codebooks corresponding to the at least two antenna port groups respectively according to the at least two PMIs and the at least one RI .

 Optionally, as another embodiment, the at least two antenna port groups determined by the processor 610 include: a horizontal antenna port group and a vertical antenna port group, and determining antenna ports corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array. The horizontal antenna port group is determined, and the antenna port corresponding to at least one column antenna array arranged in the vertical direction in the antenna array is determined as a vertical antenna port group.

 Optionally, as another embodiment, the horizontal antenna port group determined by the processor 610 corresponds to one row of antenna elements in the horizontal direction of the antenna array, and the vertical antenna port group corresponds to one column of antenna elements in the vertical direction of the antenna array, where The device 630 is specifically configured to: receive a second RI and a second PMI that are sent by the UE to indicate a precoding matrix in the second precoding codebook, and receive a preamble sent by the UE to indicate the first precoding codebook. a first PMI of the coding matrix, wherein the horizontal antenna port group corresponds to the second precoding codebook, and the vertical antenna port group corresponds to the first precoding codebook.

 Optionally, as another embodiment, the at least two antenna port groups determined by the processor 610 include: a first antenna port group and a second antenna port group, and the antenna array is divided into four sub-arrays |J of equal sizes. Determining an antenna port corresponding to one of the four sub-arrays as a first antenna port group, and determining an antenna port corresponding to three arrays of the same position from the other three sub-arrays in the four sub-arrays Two antenna port groups.

 It is to be understood that, in the embodiment of the present invention, the base station 600 according to the embodiment of the present invention may correspond to an execution body of the method according to the embodiment of the present invention, and may also correspond to the base station 100, and each module in the base station 600 The above and other operations and/or functions are respectively implemented in order to implement the respective processes of the respective methods in FIG. 3 to FIG. 5, and are not described herein again for brevity.

Therefore, the base station provided by the embodiment of the present invention transmits a reference signal for CSI measurement to a UE by using a part of antenna ports of the multiple antenna ports, and receives at least two antenna ports respectively included in the partial antenna port and fed back by the UE. Having at least two PIMs corresponding to the group, and generating a precoding matrix corresponding to the plurality of antenna ports according to the at least two precoding matrices obtained by the at least two PMIs, The problem that the overhead of the downlink pilot in the large-scale antenna system occupies a large amount of time-frequency resources is solved, thereby effectively increasing the throughput of the system.

 FIG. 7 is a schematic block diagram of a user equipment 700 in accordance with another embodiment of the present invention. As shown in FIG. 7, the base station 700 includes a processor 710, a memory 720, a receiver 730, a transmitter 770, and a bus 750. The processor 710, the memory 720, the receiver 730, and the transmitter 740 are connected by a bus system 750 for storing instructions for executing instructions stored by the memory 720. among them,

 The processor 710 is configured to: determine at least two antenna port groups, and the antenna ports of the at least two antenna port groups are part of the plurality of antenna ports.

 The receiver 730 is configured to: receive, according to the antenna port in the at least two antenna port groups determined by the processor 710, a reference signal sent by the base station for channel state information CSI measurement.

 The transmitter 740 is configured to: send CSI corresponding to the at least two antenna port groups to the base station according to the reference signal received by the receiver 730, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups .

 Therefore, the user equipment provided by the embodiment of the present invention receives a reference signal for CSI measurement by using a part of antenna ports of a plurality of antenna ports, and feeds back to the base station at least two antenna ports respectively included in the part of the antenna ports. The PMI corresponding to the at least two PIMs of the group and the PMI sent by the base station to indicate the precoding matrix corresponding to the multiple antenna ports can solve the problem that the overhead of the downlink pilots in the large-scale antenna system occupies a large amount of time-frequency resources, thereby Effectively increase the throughput of the system.

 It should be understood that, in the embodiment of the present invention, the processor 710 may be a central processing unit (CPU), and the processor 710 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

 The memory 720 can include read only memory and random access memory and provides instructions and data to the processor 710. A portion of memory 720 may also include non-volatile random access memory. For example, the memory 720 can also store information of the device type.

The bus system 750 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 750 in the figure. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 710 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 720. The processor 710 reads the information in the memory 720 and completes the steps of the above method in combination with hardware. To avoid repetition, it will not be described in detail here.

 Optionally, as an embodiment, the receiver 730 is further configured to: receive information of at least two antenna port groups sent by the base station, and antenna port information of each antenna port group.

 Optionally, as another embodiment, the antenna port information of each antenna port group received by the receiver 730 includes: port number information of a start end port of each antenna port group, or an antenna port corresponding to each antenna port group. Pattern information, the pattern information is used to indicate an identifier of a pattern of at least two antenna port groups, and the pattern is used to indicate an antenna port in each antenna port group.

 Optionally, as another embodiment, the receiver 730 is specifically configured to: receive, by using UE-specific signaling or cell-specific signaling, information of at least two antenna port groups sent by the base station and antenna port information of each antenna port group. .

 Optionally, as an embodiment, the CSI corresponding to the at least two antenna port groups sent by the transmitter 740 to the base station further includes at least one rank indicator corresponding to the at least one antenna port group of the at least two antenna port groups. RI.

 Optionally, as another embodiment, the at least two antenna port groups determined by the processor 710 include: a horizontal antenna port group and a vertical antenna port group, and determining antenna ports corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array. The horizontal antenna port group is determined, and the antenna port corresponding to at least one column antenna array arranged in the vertical direction in the antenna array is determined as a vertical antenna port group.

 Optionally, as another embodiment, the horizontal antenna port group determined by the processor 710 corresponds to one row of antenna elements in the horizontal direction of the antenna array, and the vertical antenna port group corresponds to one column of antenna elements in the vertical direction of the antenna array, where The device 730 is specifically configured to: send, to the base station, a second RI and a second PMI, which are used to indicate a precoding matrix in the second precoding codebook, and send, to the base station, a precoding matrix used to indicate the first precoding codebook. The first PMI, wherein the horizontal antenna port group corresponds to the second precoding codebook, and the vertical antenna port group corresponds to the first precoding codebook.

Optionally, as another embodiment, the at least two antenna port groups determined by the processor 710 include: a first antenna port group and a second antenna port group, and the antenna array is divided into four sub-arrays of equal size. 歹|J, determining an antenna port corresponding to one of the four sub-arrays as the first antenna port group, and selecting an antenna corresponding to three frames of one matrix from the other three sub-arrays in the four sub-arrays The port is determined to be the second antenna port group.

 Optionally, in another embodiment, the processor 710 is further configured to: obtain a CSI measurement result, and determine, according to the CSI measurement result, a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, and The precoding matrix performs quantization, and the CSI is obtained according to the quantization result of the precoding matrix.

 It should be understood that, in the embodiment of the present invention, the user equipment 700 according to the embodiment of the present invention may correspond to the execution body of the method according to the embodiment of the present invention, and may also correspond to the user equipment 200, and the user equipment 700 The above and other operations and/or functions of the respective modules are respectively implemented in order to implement the respective processes of the respective methods in FIG. 3 to FIG. 5, and are not described herein again for brevity.

 In addition, the term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or may represent: exist alone, both A and B, and B alone These three situations. In addition, the character " /" in this article generally means that the contextual object is an "or" relationship.

 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

 A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of cells is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to another system, or some features can be ignored, or not executed. In addition, the displayed or discussed mutual engagement or direct coupling or communication connection may be an indirect connection or communication through some interface, device or unit. The letter connection can also be an electrical, mechanical or other form of connection. The components displayed by the meta may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

 An integrated unit, if implemented as a software functional unit and sold or used as a standalone product, can be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent modifications may be easily conceived by those skilled in the art within the technical scope of the present disclosure. Such modifications or substitutions are intended to be included within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request  A base station, comprising:  a determining module, configured to determine at least two antenna port groups, where the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports;  a transmitting module, configured to send, by using the antenna port in the at least two antenna port groups determined by the determining module, a reference signal for channel state information CSI measurement to a user equipment UE, and a receiving module, configured to receive the UE And the CSI corresponding to the at least two antenna port groups respectively sent by the reference signal sent by the sending module, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups ;  An acquiring module, configured to acquire at least two precoding matrices according to the at least two PMIs received by the receiving module;  And a generating module, configured to generate, according to the at least two precoding matrices acquired by the acquiring module, a precoding matrix corresponding to the multiple antenna ports.  2. The base station according to claim 1, wherein  The transmitting module is further configured to send the at least the reference signal for channel state information CSI measurement to the user equipment UE by using the antenna port in the at least two antenna port groups Information of two antenna port groups and antenna port information for each antenna port group.  The base station according to claim 2, wherein the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, or each antenna port group Pattern information corresponding to the antenna port, the pattern information is used to indicate an antenna port in each antenna port group.  The base station according to claim 2 or 3, wherein the sending module is specifically configured to send the at least two antenna port groups to the UE by using UE-specific signaling or cell-specific signaling. Information and antenna port information for each antenna port group.  The base station according to any one of claims 1 to 4, wherein the generating module is specifically configured to generate the multiple by using a Kroneck function according to the at least two precoding matrices. Precoding matrix corresponding to the antenna ports. The base station according to any one of claims 1 to 5, wherein the CSI further comprises at least one rank indication RI corresponding to at least one of the at least two antenna port groups , The acquiring module is specifically configured to obtain at least two by using at least two precoding codebooks corresponding to the at least two antenna port groups according to the at least two PMIs and the at least one RI. Precoding matrix.  The base station according to any one of claims 1 to 6, wherein the at least two antenna port groups comprise a horizontal antenna port group and a vertical antenna port group, and the determining module is specifically configured to: An antenna port corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array of the base station is determined as the horizontal antenna port group, and an antenna port corresponding to at least one column of antenna elements arranged in a vertical direction in the antenna array is determined as the Vertical antenna port group.  The base station according to claim 7, wherein the horizontal antenna port group corresponds to a row of antenna elements arranged in a horizontal direction in the antenna array, and the vertical antenna port group corresponds to a vertical direction in the antenna array. a row of antennas arranged in the direction,  The receiving module is configured to receive a first PMI that is sent by the UE to indicate a precoding matrix in the first precoding codebook, and receive, by the UE, a second precoding code that is sent by the UE. a second RI and a second PMI of the precoding matrix, where the first precoding codebook corresponds to the vertical antenna port group, the second precoding codebook and the horizontal antenna port group Corresponding.  The base station according to any one of claims 1 to 6, wherein the at least two antenna port groups comprise a first antenna port group and a second antenna port group, and the determining module is specifically configured to: Dividing the antenna array of the base station into four sub-arrays of equal size, determining an antenna port corresponding to one of the four sub-arrays as a first antenna port group, and selecting the other three sub-arrays in the four sub-arrays The antenna ports corresponding to the three positions of the same position are determined as the second antenna port group.  A user equipment (UE), comprising:  a determining module, configured to determine at least two antenna port groups, where the antenna ports in the at least two antenna port groups are part of the antenna array;  a receiving module, configured to receive, by using the antenna port of the at least two antenna port groups determined by the determining module, a reference signal sent by the base station for channel state information CSI measurement;  a sending module, configured to send CSI corresponding to the at least two antenna port groups to the base station according to the reference signal received by the receiving module, where the CSI includes corresponding to the at least two antenna port groups At least two precoding matrices indicate PMI. 11. The user equipment according to claim 10, characterized in that The receiving module, before the determining module determines the at least two antenna port groups, is further configured to receive information of two antenna port groups sent by the base station and antenna port information of each antenna port group, where The determining module is specifically configured to determine at least two antenna port groups according to the information of the at least two antenna port groups and the antenna port information of each antenna port group.  The user equipment according to claim 11, wherein the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, or each antenna port The pattern information corresponding to the antenna port in the group, the pattern information is used to indicate the antenna port in each antenna port group.  The user equipment according to claim 11 or 12, wherein the receiving module is specifically configured to receive information about two antenna port groups sent by the base station by using UE-specific signaling or cell-specific signaling. And antenna port information for each antenna port group.  The user equipment according to any one of claims 10 to 13, wherein the CSI further comprises at least one rank indication RI corresponding to at least one of the at least two antenna port groups .  The user equipment according to any one of claims 10 to 14, further comprising: an obtaining module, configured to acquire a CSI measurement result, and determine the at least two antenna ports according to the CSI measurement result a precoding matrix corresponding to each antenna port group of the group, and performing quantization on the precoding matrix, and querying a precoding codebook corresponding to each antenna port group according to the quantization result of the precoding matrix, CSI.  16. A method of generating a precoding matrix, comprising:  Determining at least two antenna port groups, wherein the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports;  Transmitting, by the antenna port of the at least two antenna port groups, a reference signal for channel state information CSI measurement to the user equipment UE;  Receiving CSI corresponding to the at least two antenna port groups respectively sent by the UE according to the reference signal, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups;  Obtaining at least two precoding matrices respectively according to the at least two PMIs;  Generating a precoding matrix corresponding to the plurality of antenna ports according to the at least two precoding matrices. 17. The method of claim 16 wherein said at least said Before the antenna port of the two antenna port groups sends the reference signal for the channel state information CSI measurement to the user equipment UE, the method further includes:  The information of the at least two antenna port groups and the antenna port information of each antenna port group are transmitted to the UE.  The method according to claim 17, wherein the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, or each antenna port group Pattern information corresponding to the antenna port, the pattern information is used to indicate an antenna port in each antenna port group.  The method according to claim 17 or 18, wherein the transmitting the information of the at least two antenna port groups and the antenna port information of each antenna port group to the UE comprises: Or cell-specific signaling, transmitting information of the at least two antenna port groups and antenna port information of each antenna port group to the UE.  The method according to any one of claims 16 to 19, wherein the generating, according to the at least two precoding matrices, a precoding matrix corresponding to the multiple antenna ports, including :  And generating, according to the at least two precoding matrices, a precoding matrix corresponding to the plurality of antenna ports by using a Kroneck function.  The method according to any one of claims 16 to 20, wherein the CSI further comprises at least one rank indication RI corresponding to at least one of the at least two antenna port groups ,  Acquiring at least two precoding matrices according to the at least two PMIs, including: locating the at least two PMIs and the at least one RI, respectively, by querying corresponding to the at least two antenna port groups Obtaining the at least two precoding matrices by at least two precoding codebooks.  The method according to any one of claims 16 to 21, wherein the at least two antenna port groups comprise a horizontal antenna port group and a vertical antenna port group, and the determining at least two antenna port groups, Includes:  Determining, by the antenna port corresponding to at least one row of antenna elements arranged in a horizontal direction in the antenna array of the base station, the antenna port group, and determining an antenna port corresponding to at least one column of antenna elements arranged in a vertical direction in the antenna array as the Vertical antenna port group. The method according to claim 22, wherein the horizontal antenna port group Corresponding to a row of antenna elements arranged in a horizontal direction in the antenna array, the vertical antenna port group corresponds to a column of antenna elements arranged in a vertical direction in the antenna array,  The receiving, by the UE, the CSI corresponding to the at least two antenna port groups, which are sent by the UE according to the reference information, includes:  Receiving, by the UE, a first used to indicate a precoding matrix in the first precoding codebook PMI, and receiving, by the UE, a second RI and a second PMI, which are used to indicate a precoding matrix in the second precoding codebook, where the first precoding codebook is compared with the vertical antenna port group Correspondingly, the second precoding codebook corresponds to the horizontal antenna port group.  The method according to any one of claims 16 to 21, wherein the at least two antenna port groups comprise a first antenna port group and a second antenna port group, and the determining at least two antenna ports Group, including:  Dividing the antenna array of the base station into four sub-arrays of equal size, determining antenna ports corresponding to one of the four sub-arrays as the first antenna port group, and having the same position in the other three sub-arrays of the four sub-arrays The antenna port corresponding to the three arrays is determined as the second antenna port group.  25. A method of generating a precoding matrix, comprising:  Determining at least two antenna port groups, wherein the antenna ports in the at least two antenna port groups are part of the plurality of antenna ports;  Receiving, by the antenna ports in the at least two antenna port groups, a reference signal sent by the base station for channel state information CSI measurement;  And transmitting, according to the reference signal, CSI corresponding to the at least two antenna port groups respectively, where the CSI includes at least two precoding matrix indicating PMIs corresponding to the at least two antenna port groups.  The method according to claim 25, wherein before the determining the at least two antenna port groups, the method further includes:  Receiving, by the base station, information of the at least two antenna port groups and antenna port information of each antenna port group,  The determining the at least two antenna port groups includes:  At least two antenna port groups are determined based on the information of the at least two antenna port groups and the antenna port information of each antenna port group. The method according to claim 26, wherein the antenna port information of each antenna port group includes port number information of a start end port of each antenna port group, or Pattern information corresponding to an antenna port in each antenna port group, the pattern information being used to indicate an antenna port in each antenna port group.  The method according to claim 26 or 27, wherein the receiving the information that the base station sends the at least two antenna port groups and the antenna port information of each antenna port group includes:  The information of the at least two antenna port groups sent by the base station and the antenna port information of each antenna port group are received by UE specific signaling or cell specific signaling.  The method according to any one of claims 25 to 28, wherein the CSI further comprises at least one rank indication RI corresponding to at least one of the at least two antenna port groups.  The method according to any one of claims 25 to 29, wherein before the CSI corresponding to the at least two antenna port groups is respectively sent to the base station according to the reference signal, The method also includes:  Obtain CSI measurement results;  Determining, according to the CSI measurement result, a precoding matrix corresponding to each antenna port group of the at least two antenna port groups, and performing quantization on the precoding matrix;  Obtaining the csi according to the quantization result of the precoding matrix to query a precoding codebook corresponding to each antenna port group.