CN104348575A - Pre-coding matrix feedback method and terminal - Google Patents

Pre-coding matrix feedback method and terminal Download PDF

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Publication number
CN104348575A
CN104348575A CN201310319590.XA CN201310319590A CN104348575A CN 104348575 A CN104348575 A CN 104348575A CN 201310319590 A CN201310319590 A CN 201310319590A CN 104348575 A CN104348575 A CN 104348575A
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China
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matrix
information
amp
antenna
vector
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CN201310319590.XA
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Chinese (zh)
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肖华华
陈宪明
陈艺戬
鲁照华
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中兴通讯股份有限公司
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Priority to CN201310319590.XA priority Critical patent/CN104348575A/en
Publication of CN104348575A publication Critical patent/CN104348575A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478Special codebook structures directed to feedback optimization
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • H04L1/0029Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Abstract

The invention discloses a pre-coding matrix feedback method and a terminal. The method comprises the following steps that (1) a terminal measures a channel matrix H and determines a first matrix Ui information and a second matrix Pjv information according to the channel matrix H, (2) the terminal reports index information which indicates the first matrix Ui and index information which indicates the second matrix Pjv, or the terminal reports parameter information which forms the first matrix Ui and parameter information which forms the second matrix Pjv. According to the pre-coding matrix feedback method and the terminal, the requirement of a large antenna array system antenna port number can be satisfied, and a channel coefficient matrix can be accurately quantified while the feedback cost is saved.

Description

A kind of precoding matrix feedback method and terminal

Technical field

The present invention relates to radio digital communication field, particularly relate to a kind of precoding matrix feedback method and terminal.

Background technology

At Long Term Evolution (Long Term Evolution, LTE) in system, its agreement is that Release8(is called for short R8) version, this agreement predetermined channel state information (Channel State Information, CSI) three kinds of forms are had: channel quality instruction (Channels Quality Indication, CQI), pre-coding matrix instruction (Pre-coding Matrix Indicator, PMI), order instruction (Rank Indicator, RI).Wherein, CQI is the index weighing down channel quality quality.PMI refers to only under this emission mode of Closed-Loop Spatial Multiplexing, terminal (User Equipment, UE) base station (eNode B is told according to the channel quality recorded, eNB) which type of pre-coding matrix should be used to carry out precoding to the Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) issuing this UE.The feedback granularity of PMI can be whole bandwidth feedback PMI, also can feed back PMI according to subband (subband).RI for describing the number of space independent channel, the order of respective channels response matrix.Under Open-Loop Spatial Multiplexing and Closed-Loop Spatial Multiplexing pattern, need UE to feed back RI information, under other patterns, do not need feedback RI information.

Senior Long Term Evolution (Long Term Evolution Advanced, LTE-A) system as the evolution standard of LTE introduces a lot of new technology: the transmission of (1) descending maximum support 8 antenna; (2) cooperative multipoint transmission (Coordinated Multiple Point transmission, CoMP), the introducing of these technology improves cell average spectral efficiency and edge spectrum efficiency significantly.

Nonetheless, along with the arrival in intelligence epoch, it is found that multiple-input and multiple-output (the Multiple-Input Multiple-Out-put of use 4 or 8 antennas, MIMO) technology has been not enough to the lifting of power system capacity the explosive growth meeting flow, and the further enhancing of MIMO technology is extremely urgent.Under this background, three-dimensional (Three Dimensions, 3D) MIMO and extensive (Massive) MIMO is carried out.Wherein 3D MIMO has opened up the space of vertical dimensions further on the basis of existing 2D MIMO, can adjust wave beam in direction that is vertical and horizontal direction simultaneously, thus MIMO the is had larger degree of freedom.And Massive MIMO further develops existing MIMO or 3D MIMO and reforms, dozens or even hundreds of antenna (or oscillator) is introduced in base station side, thus make base station side have larger spatial degrees of freedom, further can suppress co-channel interference, thus multiplexing more user is to improve spectrum efficiency and the edge spectrum efficiency of system.Consider the size of antenna, and take up an area and install, generally by these large-scale antennas base station side with plane or be similar to plane form place, namely antenna is placed to N vrow N hrow, formation plane electrode array as shown in Figure 1 or planar bipolar array as shown in Figure 2.In planar antenna array in Fig. 1 and Fig. 2, antenna on each position can be single-polarized antenna (oscillator), the dual polarized antenna (oscillator) of positive and negative 45 degree, the dual polarized antenna (oscillator) of horizontal vertical, the dual circularly polarized antenna (oscillator) that left and right circle rotates, wherein N vand N hfor being more than or equal to the positive integer of 1, and can not be 1 simultaneously.

Although 3D MIMO or Massive MIMO has larger spatial degrees of freedom than prior art, thus suppress co-channel interference and multiplexing more user to improve the performance of system better, but have an important prerequisite exactly: base station must obtain the down channel matrix information between base station and each user accurately.In FDD system, terminal utilizes channel condition information reference symbol (Channel State Information-Reference Signal:CSI-RS) to measure down channel matrix information, then it quantification is become a code word in code book (Code Book), and information corresponding for code word is fed back to base station by ascending control channel or shared channel, base station is terminal transmission data etc. based on this information, so the accuracy of channel information depends on the design of code book completely.Here, code book refers to the set of predefined multiple matrix or vector, and respectively preserve a identical copy with end side in base station, each matrix or vector are called a code word.On the one hand, the code book of existing standard only supports linear array antenna, and antenna port number is not more than the situation of 8, can not meet 3D MIMO or the planar antenna array required by these new technologies of Massive MIMO and/or the requirement of port number more than 8; On the other hand, need when design codebooks to consider the compromise between expense and performance, because expense is also the problem faced by real system.For this large-scale antenna array, the dimension of its channel coefficient matrix is very large, and now want to quantize these coefficient matrixes more accurately, its expense is very large.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of precoding matrix feedback method and terminal, can meet the requirement of large-scale antenna array system antenna port number, again can while saving feedback overhead quantized channel coefficient matrix more accurately.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of precoding matrix feedback method, described method comprises:

Terminal measures channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;

Terminal to report indicates the first matrix U iindex information and instruction the second matrix index information;

Or terminal to report constructs the first matrix U iparameter information and structure the second matrix parameter information.

Preferably, described in n t× N mcomplex matrix, U irepresent i-th code word of first kind code book, U ikth row u i,knormalized N tthe multiple column vector of × 1, N tfor antenna or the measurement pilot frequency port number of base station, k=1, L, N m, i=1, L, N s1, N s1for the code word number of first kind code book, N mfor the columns of first kind code book code word.

Preferably, described u i,kfor f 1(v i,k, h i,k), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, and h represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, k=1, L, N m, i=1, L, N s1, N vand N hfor positive integer.

Preferably, described u i,kfor f 2i,k, φ i,k), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ i,k, φ i,kspan is [0,2 π], k=1, L, N m, i=1, L, N s1.

Preferably, described U ifrom N t× N ccomplex matrix U in select N marrange and obtain.

Preferably, i-th of described complex matrix U f is classified as 1(v i, h i), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, k=1, L, N m, i=1, L, N c, N cfor the columns of matrix U.

Preferably, described in f 1 ( v i , h i ) = v i ⊗ h i Or f 1 ( v i , h i ) = h i ⊗ v i , Or, f 1 ( v i , h i ) = v i , 1 h i · · · v i , Nv h i Or f 1 ( v i , h i ) = h i , 1 v i · · · h i , N h v i , V i,kfor vector v ia kth element, k=1, L, N v, h i,kfor vectorial h ia kth element, k=1, L, N h, N vand N hfor positive integer, and N t=N v× N h, represent that kronecker amasss.

Preferably, described vector v ia kth element v i , k = 1 N v e j ( k - 1 ) θ i , K=1, L, N v, vectorial h ia kth element h i , k = 1 N h e j ( k - 1 ) φ i , K=1, L, N h, θ i, φ ispan is [0,2 π], i=1, L, N c.

Preferably, described h ibe expressed as h i = x ⊗ h ~ i Or h i = h ~ i ⊗ x , h i = α h ~ i β h ~ i Or h i = h ~ i , 1 x · · · h ~ i , N h 2 x , Wherein, x = 1 2 α β , α, β are plural number, for a jth element, for positive integer, and N t=N v× N h, represent that kronecker amasss.

Preferably, described vector v ia kth element k=1, L, N v, vector a kth element θ i, φ ispan is [0,2 π], i=1, L, N c.

Preferably, described in α β Include but not limited to one of following form:

1 0 , 0 1 , 1 1 , 1 - 1 , 1 j , 1 - j , j 1 , j - 1 .

Preferably, i-th of described complex matrix U f is classified as 2i, φ i), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ i, φ ispan is [0,2 π], i=1, L, N c.

Preferably, described f 2for by θ i, φ ibe mapped to N tl element of the vector of × 1 is v i , 1 h i · · · v i , Nv h i Or h i , 1 v i · · · h i , N h v i L element, i=1, L, N c.

Preferably, described in n mthe complex matrix of × υ, represent a jth code word of Equations of The Second Kind code book, j=1, L, N s2, N s2for the code word number of Equations of The Second Kind code book, υ is the total number of plies information of data of described terminal, N mfor being less than N tpositive integer.

Preferably, the first matrix U is being determined iinformation and the second matrix after information, described method also comprises:

Terminal is according to the first matrix U iinformation and the second matrix information obtains channel related information and calculate channel quality indicator (CQI) according to W; Wherein, F is by matrix be mapped to N t× υ ties up the function of matrix.

Preferably, in terminal to report first matrix U iinformation and the second matrix after information, described method also comprises:

The first matrix U that base station is sent according to terminal iinformation and the second matrix information obtains channel related information W = F ( U i , P j v ) ;

Dispatch terminal according to W, and select downlink transmission mode to communicate with terminal, wherein downlink transmission mode includes but not limited to one or more in following transmission means:

Single user MIMO transmission pattern, Multi-user mimo transmissions pattern, single user/multi-user's switching at runtime transmission mode, coordinated multipoint transmission pattern.

The invention provides a kind of terminal, described terminal comprises:

Matrix information determining unit, for measuring channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;

Index information reports unit, for reporting instruction first matrix U iindex information and instruction the second matrix index information; Or,

Parameter information reports unit, for reporting structure first matrix U iparameter information and structure the second matrix parameter information.

As from the foregoing, technical scheme of the present invention comprises: terminal to report first matrix U iinformation and the second matrix information; Thus, usually report two matrix informations, the present invention can meet the requirement of large-scale antenna array system antenna port number, again can while saving feedback overhead quantized channel coefficient matrix more accurately.

Accompanying drawing explanation

Fig. 1 is the planar monopole array schematic diagram of the embodiment of the present invention;

Fig. 2 is the planar bipolar aerial array schematic diagram of the embodiment of the present invention;

Fig. 3 is the schematic flow sheet of a kind of precoding matrix feedback method of the embodiment of the present invention;

Fig. 4 is the schematic flow sheet of a kind of precoding matrix feedback method of the embodiment of the present invention;

Fig. 5 is the structural representation of the terminal of the embodiment of the present invention;

Fig. 6 is the structural representation of the terminal of the embodiment of the present invention;

Fig. 7 is the antenna index schematic diagram of the planar monopole array of the embodiment of the present invention;

Fig. 8 is the antenna index schematic diagram of the planar monopole array of the embodiment of the present invention;

Fig. 9 is the antenna index schematic diagram of the planar bipolar aerial array of the embodiment of the present invention;

Figure 10 is the antenna index schematic diagram of the planar bipolar aerial array of the embodiment of the present invention;

Figure 11 is the antenna index schematic diagram of the planar bipolar aerial array of the embodiment of the present invention;

Figure 12 is the antenna index schematic diagram of the planar bipolar aerial array of the embodiment of the present invention.

Embodiment

In order to obtain higher peaks spectrum efficiency, in system after LTE-A R11, the descending transmission needing support 3D MIMO and/or Massive MIMO, on the one hand, the feedback control signaling of channel information needs to keep backwards compatibility, to support that single user (Single User MIMO, SU-MIMO) MIMO is for priority principle, the feedback form of the CQI/PMI/RI before compatible as far as possible existing R11; On the other hand, the feeding back channel state information of channel information needs to consider forward compatibility, need to redesign new R12 or code book afterwards, one is the antenna alignment form in order to adapt to planar antenna array, two is the precision improving codeword feedback reducing codeword feedback expense while, thus 3D MIMO and/or Massive MIMO is better supported, ensure that new technology has acceptable performance.

The invention provides a kind of precoding matrix feedback method, as shown in Figure 3, described method comprises:

Step 301, terminal measure channel matrix H, and determine the first matrix U according to channel matrix H iinformation and the second matrix information;

Step 302, terminal to report indicate the first matrix U iindex information and instruction the second matrix index information;

The invention provides a kind of precoding matrix feedback method, as shown in Figure 4, described method comprises:

Step 401, terminal measure channel matrix H, and determine the first matrix U according to channel matrix H iinformation and the second matrix information;

Step 402, terminal to report construct the first matrix U iparameter information and structure the second matrix parameter information.

Preferably, described in n t× N mcomplex matrix, U irepresent i-th code word of first kind code book, U ikth row u i,knormalized N tthe multiple column vector of × 1, N tfor antenna or the measurement pilot frequency port number of base station, k=1, L, N m, i=1, L, N s1, N s1for the code word number of first kind code book, N mfor the columns of first kind code book code word.

Preferably, described u i,kfor f 1(v i,k, h i,k), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, and h represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, k=1, L, N m, i=1, L, N s1, N vand N hfor positive integer, represent line number and the columns of aerial array respectively.

Preferably, described u i,kfor f 2i,k, φ i,k), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ, φ are the variablees that angle is relevant, and span is [0,2 π], k=1, L, N m, i=1, L, N s1.

Preferably, described U ifrom N t× N ccomplex matrix U in select N marrange and obtain.

Preferably, i-th of described complex matrix U f is classified as 1(v i, h i), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, k=1, L, N m, i=1, L, N c, N cfor the columns of matrix U.

Preferably, described in f 1 ( v i , h i ) = v i ⊗ h i Or f 1 ( v i , h i ) = h i ⊗ v i , Or, f 1 ( v i , h i ) = v i , 1 h i · · · v i , Nv h i Or f 1 ( v i , h i ) = h i , 1 v i · · · h i , N h v i , V i,kfor vector v ia kth element, k=1, L, N v, h i,kfor vectorial h ia kth element, k=1, L, N h, N vand N hfor positive integer, represent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, represent that kronecker amasss.

Preferably, described vector v ia kth element k=1, L, N v, vectorial h ia kth element k=1, L, N h, θ ithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, θ i, φ ispan is [0,2 π], i=1, L, N c.

Preferably, described h ibe expressed as h i = x ⊗ h ~ i Or h i = h ~ i ⊗ x , h i = α h ~ i β h ~ i Or h i = h ~ i , 1 x · · · h ~ i , N h 2 x , Wherein, x = 1 2 α β , α β For plural number, represent the variable that dual polarization polarised direction is relevant, for a jth element, n vwith for positive integer, represent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, represent that kronecker amasss.

Preferably, described vector v ia kth element k=1 ..., N v, vector a kth element θ ithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, θ i, φ ispan is [0,2 π], i=1 ..., N c.

Preferably, described in α β Include but not limited to one of following form:

1 0 , 0 1 , 1 1 , 1 - 1 , 1 j , 1 - j , j 1 , j - 1 .

Preferably, i-th of described complex matrix U f is classified as 2i, φ i), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ, φ are the variablees that angle is relevant, θ i, φ ispan is [0,2 π], i=1 ..., N c.

Preferably, described f 2for by θ i, φ ibe mapped to N tl element of the vector of × 1 is v i , 1 h i · · · v i , Nv h i Or h i , 1 v i · · · h i , N h v i L element, i=1 ..., N c.

Preferably, described in n mthe complex matrix of × υ, represent a jth code word of Equations of The Second Kind code book, j=1 ..., N s2, N s2for the code word number of Equations of The Second Kind code book, υ is the total number of plies information of data of described terminal, N mfor being less than N tpositive integer.

Preferably, the first matrix U is being determined iinformation and the second matrix after information, described method also comprises:

Terminal is according to the first matrix U iinformation and the second matrix information obtains channel related information and calculate channel quality indicator (CQI) according to W; Wherein, F is by matrix be mapped to N t× υ ties up the function of matrix.

Preferably, in terminal to report first matrix U iinformation and the second matrix after information, described method also comprises:

The first matrix U that base station is sent according to terminal iinformation and the second matrix information obtains channel related information W = F ( U i , P j v ) ;

According to W, terminal is dispatched, and select downlink transmission mode to communicate with terminal., wherein downlink transmission mode includes but not limited to one or more in following transmission means:

Single user MIMO transmission pattern, Multi-user mimo transmissions pattern, single user/multi-user's switching at runtime transmission mode, coordinated multipoint transmission pattern.

The invention provides a kind of terminal, as shown in Figure 5, described terminal comprises:

Matrix information determining unit, for measuring channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;

Index information reports unit, for reporting instruction first matrix U iindex information and instruction the second matrix index information.

The invention provides a kind of terminal, as shown in Figure 6, described terminal comprises:

Matrix information determining unit, for measuring channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;

Parameter information reports unit, for reporting structure first matrix U iparameter information and structure the second matrix parameter information.

The embodiment of the present invention is when terminal is to base station transmitting channel state information, be divided into the first code book index and the second code book index, the precoding direction that first code book index mainly indicates this terminal large, and the second code book index is on the large precoding direction that a code book index indicates, the instantaneous precoding direction of the described terminal of further instruction more refinement, thus improve the precision of 3D MIMO and/or Massive MIMO precoding.In addition, the code word matrix dimension that first code book is corresponding is large but feedback cycle is long, and the dimension of code word matrix corresponding to the second code book is much smaller than code word dimension corresponding to the first code book, it needs, and the bit number of quantification is very little, feedback cycle is short, so the method utilizing the embodiment of the present invention to provide, can obtain on the basis of not obvious increase feedback quantity and can meet the precoding information of quantization error, thus significantly strengthen the performance of 3D MIMO or Massive MIMO, and then improve efficiency of transmission and the transmission quality of system.

It should be noted that, to described U ieach row order exchange, or to described each row order exchange, all within the protection range of this patent.

Below in conjunction with embodiment, the inventive method is further described.

Embodiment 1

In the present embodiment, base station and terminal all preserve two class code books: first kind code book U i, i=1 ..., N s1, wherein, U in t× N mcomplex matrix, N s1for the code word number of first kind code book; Equations of The Second Kind code book υ is the total number of plies information of data of user, wherein, n mthe complex matrix of × υ, for the code word number of Equations of The Second Kind code book, υ is for being not more than N mpositive integer.Terminal completes the feedback procedure of pre-coding matrix index by step (1.1) and (1.2):

(1.1) terminal measures the down channel matrix information H of described base station to terminal, determines first kind code book index i according to channel matrix information H, and the code word of its correspondence is U i, and when cycle T 1 arrives, code book index i is fed back to base station.

Certainly, uplink detection (Sounding) information or alternate manner also can be utilized directly by U ifeed back to base station.

(1.2) terminal determines total number of plies υ and Equations of The Second Kind code book index j according to channel matrix information H, and the code word of its correspondence is and when cycle T 2 arrives, code book index j is fed back to base station.

Certainly, up Sounding information or alternate manner also can be utilized directly will feed back to base station.

Preferably, terminal feeds back CQI to base station according to step (1.3).

(1.3) terminal is according to code word U iwith calculate and obtain channel related information calculate CQI according to W again and feed back to base station.

Wherein, F (A, B) is by N t× N mmatrix A, B and N mthe matrix B of × υ is mapped to N ta function of × υ Matrix C, is greater than the situation of 1 for υ, each row of C keep orthogonal.Such as, to C=A × B, or its Equivalent realization form here, c i,jfor Matrix C i-th row j column element, a i,lfor matrix A, the i-th row l column element of B, b l,jthe capable j column element of l for matrix B.For the situation that C is multiple row, need to carry out orthogonalization process to each row of C.

Base station obtains pre-coding matrix by step (2.1) and (2.2).

(2.1) base station receives the first matrix U that UE sends iinformation and the second matrix information.

Wherein, base station can also combine the mode of searching codebook set by the mode of code book index and obtain the first matrix U iinformation and the second matrix information, such as, the first code book index i fed back by UE, and to search with the first code book index i the code word that code word corresponding to the first code book obtain its correspondence be U i; The the second code book index j fed back by UE, and in conjunction with the maximum data number of plies υ that active user can reach, searching the code word that code word corresponding to the second code book obtain its correspondence is

Certainly, if terminal feedback is not code book index, base station also can therefrom obtain the first matrix U by corresponding terminal feedback technology such as up Sounding iinformation and the second matrix information.

(2.2) according to the first matrix U iinformation and the second matrix information obtains channel related information W = F ( U i , P j v ) .

Wherein, F (A, B) is by N t× N mmatrix A, B and N mthe matrix B of × υ is mapped to N ta function of × υ Matrix C, is greater than the situation of 1 for υ, each row of C keep orthogonal.Its processing procedure is consistent with the processing procedure of terminal.

Preferably, base station performs step (2.3) to complete with channel related information W user scheduling and the process transmitting data.

(2.3) base station is dispatched UE according to W, and selects downlink transmission mode to communicate with UE.Described downlink transmission mode can be following one: SU-MIMO transmission mode, multi-user's multiple-input and multiple-output (Multiple User, MU-MIMO) transmission mode, single user/multi-user's switching at runtime transmission mode and coordinated multipoint transmission pattern.

Embodiment 2

In the present embodiment, the building method of first kind code book is illustrated, i.e. function f 1be expressed as the form that two vectorial kronecker are long-pending.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, i=1 ..., N s1, N s1for the code word number of first kind code book.

I-th code word U of first kind code book ikth row u i,k, be f 1(v i,k, h i,k), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, i.e. f 1(v, h) represents N v× 1 vector v i,k, h i,kand N hthe form that the kronecker of the vectorial h of × 1 is long-pending, k=1 ..., N m, i=1 ..., N s1.Wherein, the concrete form that kronecker amasss follows the indexed mode of antenna in aerial array relevant.

In the present embodiment, the example having some more concrete.

Example a: be configured with planar antenna array as shown in Figure 7 in base station side, wherein, each position comprises the antenna of a single polarization, the index of antenna with behavior main sequence, i.e. first drained the first row, then ranked second row until drained last column.For this antenna index mode, n hthe vectorial h of × 1 represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, such as v i,k, N v× 1 vector v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, such as h i,k, k=1 ..., N m, i=1 ..., N s1.N hrepresent the columns of antenna, N vrepresent the line number of antenna.A concrete antenna configuration, e.g., has 32 antennas for base station side, and be arranged in the form that 4 row 8 arrange, so h is a N hthe vector of × 1, so v i,k, h i,kit is the vector of 4 × 1.F 1the result of (v, h) is the vector of 32 × 1.

Certainly, vector v i,k, h i,kthe form of DFT vector can be expressed as further, as vector v with h ia kth element k=1 ..., N v, vectorial h ia kth element k=1 ..., N hithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, i=1 ..., N s1.

Example b: be configured with planar antenna array as shown in Figure 8 in base station side, wherein, each position comprises the antenna of a single polarization, and the index of antenna take row as main sequence, i.e. first drained first row, then ranked second row until drained last is only classified as.For this antenna index mode, wherein, the implication of h and v and the just the same of example a.

Example c: be configured with planar antenna array as shown in Figure 9 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna with behavior main sequence, i.e. first drained the first row, ranked second row again until drained last column, for the antenna of same a line, the first antenna of a drained polarised direction, the antenna of such as positive 45 ° of polarization, arrange the antenna of another one polarised direction again, the antenna of such as positive 45 ° of polarization.For this antenna index mode, n hthe vectorial h of × 1 represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, such as h i,k.And h can be expressed as further wherein, x represents and includes but not limited to one of following form by the variable that polarised direction is relevant: 1 0 , 0 1 , 1 1 , 1 - 1 , 1 j , 1 - j , j 1 , j - 1 , represent the precoding vector with the same polarised direction antenna of a line, such as n v× 1 vector v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, such as v i,k, k=1 ..., N m, i=1 ..., N s1.N hrepresent the columns of antenna, N vrepresent the line number of antenna.

Certainly, vector v i,k, h i,kwith the form of DFT vector can be expressed as further, as vector v ia kth element k=1 ..., N v, vector a kth element θ ithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, i=1 ..., N s1.

Example d: be configured with planar antenna array as shown in Figure 10 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna with behavior main sequence, i.e. first drained the first row, then ranked second row until drained last column, for the antenna of same a line, a pair identical dual polarized antenna is put in first ranking, antenna negative 45 ° of antennas polarized again of such as first 45 ° of polarization, then arranges a pair dual polarized antenna of the next position of same a line.For this antenna index mode, h can be expressed as further wherein parameter h, v, x, implication and example c just the same.

Example e: be configured with planar antenna array as shown in figure 11 in base station side, wherein, each position comprises a pair dual-polarized antenna, and the index of antenna take row as main sequence, i.e. first drained first row, ranked second row again until drained last is only classified as, for the antenna of same a line, the first antenna of a drained polarised direction, the antenna of such as positive 45 ° of polarization, arrange the antenna of another one polarised direction again, the antenna of such as positive 45 ° of polarization.For this antenna index mode, and h can be expressed as further wherein parameter h, v, x, implication and example c just the same.

Example f: be configured with planar antenna array as shown in figure 12 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna take row as main sequence, i.e. first drained first row, then ranked second row until drained last is only classified as, for the antenna of same a line, a pair identical dual polarized antenna is put in first ranking, antenna negative 45 ° of antennas polarized again of such as first 45 ° of polarization, then arranges a pair dual polarized antenna of the next position of same a line.For this antenna index mode, h can be expressed as further wherein parameter h, v, x, implication and example c just the same.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 3

In the present embodiment, the building method of first kind code book is illustrated, i.e. function f 1be expressed as two vectorial expansion forms.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, i=1 ..., N s1, N s1for the code word number of first kind code book.

I-th code word U of first kind code book ikth row u i,k, be f 1(v i,k, h i,k), k=1 ..., N m, i=1 ..., N s1, wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, f 1the concrete form of (v, h) is relevant with the indexed mode of antenna in aerial array.

In the present embodiment, the example having some more concrete.

Example a: be configured with planar antenna array as shown in Figure 7 in base station side, wherein, each position comprises the antenna of a single polarization, the index of antenna with behavior main sequence, i.e. first drained the first row, then ranked second row until drained last column.For this antenna index mode, f 1 ( v , h ) = v 1 h · · · v Nv h , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, N hthe vectorial h of × 1 represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, such as v i,k, N v× 1 vector v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, such as h i,k, k=1 ..., N m, i=1 ..., N s1.N hrepresent the columns of antenna, N vrepresent the line number of antenna.A concrete antenna configuration, e.g., has 32 antennas for base station side, and be arranged in the form that 4 row 8 arrange, so h is a N hthe vector of × 1, so v i,k, h i,kit is the vector of 4 × 1.F 1the result of (v, h) is the vector of 32 × 1.

Certainly, vector v i,k, h i,kthe form of DFT vector can be expressed as further, as vector v with h ia kth element k=1 ..., N v, vectorial h ia kth element k=1 ..., N hithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, i=1 ..., N s1.

Example b: be configured with planar antenna array as shown in Figure 8 in base station side, wherein, each position comprises the antenna of a single polarization, and the index of antenna take row as main sequence, i.e. first drained first row, then ranked second row until drained last is only classified as.For this antenna index mode, f 1 ( v , h ) = h 1 v · · · h N h v , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, wherein, the implication of h and v and the just the same of example a.

Example c: be configured with planar antenna array as shown in Figure 9 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna with behavior main sequence, i.e. first drained the first row, ranked second row again until drained last column, for the antenna of same a line, the first antenna of a drained polarised direction, the antenna of such as positive 45 ° of polarization, arrange the antenna of another one polarised direction again, the antenna of such as positive 45 ° of polarization.For this antenna index mode, f 1 ( v , h ) = v 1 h · · · v Nv h , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, N hthe vectorial h of × 1 represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, such as h i,k.And h can be expressed as further or h = α h ~ β h ~ , Here, x = 1 2 α β , Wherein, x represents and includes but not limited to one of following form by the variable that polarised direction is relevant: 1 0 , 0 1 , 1 1 , 1 - 1 , 1 j , 1 - j , j 1 , j - 1 , represent the precoding vector with the same polarised direction antenna of a line, such as n v× 1 vector v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, such as v i,k, k=1 ..., N m, i=1 ..., N s1.N hrepresent the columns of antenna, N vrepresent the line number of antenna.

Certainly, vector v i,k, h i,kwith the form of DFT vector can be expressed as further, as vector v ia kth element v i , k = 1 N v e j ( k - 1 ) θ i , k = 1 , · · · , N v , Vector a kth element h ~ i , k = 1 N h e j ( k - 1 ) φ i , θ ithe variable of the level orientation angular dependence (-dance) of arrival bearing, φ ithe variable that the vertical angle of pitch of arrival bearing is relevant, i=1 ..., N s1.

Example d: be configured with planar antenna array as shown in Figure 10 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna with behavior main sequence, i.e. first drained the first row, then ranked second row until drained last column, for the antenna of same a line, a pair identical dual polarized antenna is put in first ranking, antenna negative 45 ° of antennas polarized again of such as first 45 ° of polarization, then arranges a pair dual polarized antenna of the next position of same a line.For this antenna index mode, f 1 ( v , h ) = v 1 h · · · v Nv h , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, h can be expressed as further or h ~ 1 x · · · h ~ N h 2 x , Wherein parameter h, v, x, implication and example c just the same.

Example e: be configured with planar antenna array as shown in figure 11 in base station side, wherein, each position comprises a pair dual-polarized antenna, and the index of antenna take row as main sequence, i.e. first drained first row, ranked second row again until drained last is only classified as, for the antenna of same a line, the first antenna of a drained polarised direction, the antenna of such as positive 45 ° of polarization, arrange the antenna of another one polarised direction again, the antenna of such as positive 45 ° of polarization.For this antenna index mode, f 1 ( v , h ) = h 1 v · · · h N h v , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, and h can be expressed as further or h = α h ~ β h ~ , Here, x = 1 2 α β , Wherein parameter h, v, x, implication and example c just the same.

Example f: be configured with planar antenna array as shown in figure 12 in base station side, wherein, each position comprises a pair dual-polarized antenna, the index of antenna take row as main sequence, i.e. first drained first row, then ranked second row until drained last is only classified as, for the antenna of same a line, a pair identical dual polarized antenna is put in first ranking, antenna negative 45 ° of antennas polarized again of such as first 45 ° of polarization, then arranges a pair dual polarized antenna of the next position of same a line.For this antenna index mode, f 1 ( v , h ) = h 1 v · · · h N h v , V kfor a kth element of vector v, k=1 ..., N v, h kfor a kth element of vectorial h, k=1 ..., N h, N vand N hrepresent line number and the columns of antenna in planar antenna array respectively, and N t=N v× N h, h can be expressed as further or h ~ 1 x · · · h ~ N h 2 x , Wherein parameter h, v, x, implication and example c just the same.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 4

In the present embodiment, the building method of first kind code book is illustrated, i.e. function f 2be expressed as the vector that two angles are formed.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, i=1 ..., N s1, N s1for the code word number of first kind code book.

I-th code word U of first kind code book ikth row u i,k, be f 2i,k, φ i,k), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ, φ are the variablees that angle is relevant, and such as θ represents the variable that horizontal direction parallactic angle is relevant, such as θ i,k, φ represents the variable that vertical pitching is relevant, such as φ i,k, k=1 ..., N m, i=1 ..., N s1.Wherein, f 2l the element of (θ, φ) and the f of embodiment 2 or embodiment 3 1(v, h) l element when v, h have DFT vector form is just the same.Here be not repeated.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 5

In the present embodiment, illustrate the building method of first kind code book, from a large matrix, select multiple row to form, and function f 1be expressed as the form that two vectorial kronecker are long-pending.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, it is from N t× N ccomplex matrix U in select N marrange and obtain, i=1 ..., N s1, N s1for the code word number of first kind code book.

Here, i-th of complex matrix U f is classified as 1(v i, h i), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, i.e. f 1(v, h) represents N v× 1 vector v i,k, h i,kand N hthe form that the kronecker of the vectorial h of × 1 is long-pending, h represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, and v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, k=1 ..., N m, i=1 ..., N c, N cfor the columns of matrix U.k=1,…,N m,i=1,…,N s1。Wherein, the concrete form that kronecker amasss follows the indexed mode of antenna in aerial array relevant.More concrete example and embodiment 2 li completely the same, is not repeated here.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 6

In the present embodiment, illustrate the building method of first kind code book, it selects multiple row to form from a large matrix, and function f 1represent and two vector extensions are become the vector form that a dimension is larger.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, it is from N t× N ccomplex matrix U in select N marrange and obtain, i=1 ..., N s1, N s1for the code word number of first kind code book.

Here, i-th of complex matrix U f is classified as 1(v i, h i), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, h represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, and v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, k=1 ..., N m, i=1 ..., N c, N cfor the columns of matrix U.F 1the concrete form of (v, h) is relevant with the indexed mode of antenna in aerial array, and the example a ~ example f of concrete execution mode and embodiment is completely the same, is not repeated here.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 7

In the present embodiment, illustrate the building method of first kind code book, from a large matrix, select multiple row to form, and function f 2represent and two angles are generated a vector.Base station and terminal all preserve two class code books, first kind code book U i, wherein, U in t× N mcomplex matrix, it is from N t× N ccomplex matrix U in select N marrange and obtain, i=1 ..., N s1, N s1for the code word number of first kind code book.

Here, i-th of complex matrix U f is classified as 2i, φ i), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ, φ are the variablees that angle is relevant, and such as θ represents the variable that horizontal direction parallactic angle is relevant, such as θ i, φ represents the variable that vertical pitching is relevant, such as φ i, i=1 ..., N c.Wherein, f 2l the element of (θ, φ) and the f of embodiment 5 or embodiment 6 1(v, h) l element when v, h have DFT vector form is just the same.Here be not repeated.

Certainly, for different antenna index or arrangement mode, f 1some change of the form of (v, h), as long as but be all within the protection range of this patent by vector form larger for two vector generations one.

Easily know, the present invention i-th code word U iin the order of each row can mutually exchange, i=1 ..., N s1.

Terminal by completing the feedback procedure of pre-coding matrix index with the duplicate step of embodiment 1 (1.1) and (1.2), and completes calculating to CQI and feedback procedure by step (1.3), is not repeated here.

Base station by completing pre-coding matrix acquisition process with the duplicate step of embodiment 1 (2.1) and (2.2), and completes the scheduling to user by step (2.3), and the process of transmission data, is not repeated here.

Embodiment 8

To adopting the precoding matrix feedback method of the embodiment of the present invention to realize, process that eNB with UE communicate is introduced below:

Step 001, eNB sends CSI-RS to UE;

Step 002, UE carries out down channel estimation according to the CSI-RS received, and obtains pre-coding matrix (Pre-coding Matrix);

Step 003, UE determines CSI, and wherein PMI comprises the index of first kind code book and the index of Equations of The Second Kind code book;

Step 004, institute CSI is reported eNB by UE;

Step 005, eNB obtains the code word of first kind code book according to the first kind code book index in CSI, obtains the code word of Equations of The Second Kind code book according to Equations of The Second Kind code book index, and according to the code word of first kind code book and the code word determination channel related information of Equations of The Second Kind code book;

Step 006, eNB dispatches UE according to channel related information, and selects transmission means to communicate with UE.

Adopt the present invention can be embodied as Massive MIMO transmission and high-precision channel condition information is provided.

It should be noted that, if do not conflicted, each feature in the embodiment of the present invention and embodiment can be combined with each other, all within protection scope of the present invention.In addition, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.

Claims (17)

1. a precoding matrix feedback method, is characterized in that, described method comprises:
Terminal measures channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;
Terminal to report indicates the first matrix U iindex information and instruction the second matrix index information; Or,
Terminal to report constructs the first matrix U iparameter information and structure the second matrix parameter information.
2. method according to claim 1, is characterized in that, described in n t× N mcomplex matrix, U irepresent i-th code word of first kind code book, U ikth row u i,knormalized N tthe multiple column vector of × 1, N tfor antenna or the measurement pilot frequency port number of base station, k=1 ..., N m, i=1 ..., N s1, N s1for the code word number of first kind code book, N mfor the columns of first kind code book code word.
3. method according to claim 2, is characterized in that, described u i,kfor f 1(v i,k, h i,k), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, v represents when only having 1 array antenna, the pre-coding matrix that this array antenna has, and h represents when only having 1 row antenna, the pre-coding matrix that this row antenna has, k=1 ..., N m, i=1 ..., N s1, N vand N hfor positive integer.
4. method according to claim 2, is characterized in that, described u i,kfor f 2i,k, φ i,k), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ i,k, φ i,kspan is [0,2 π], k=1 ..., N m, i=1 ..., N s1.
5. method according to claim 1 and 2, is characterized in that, described U ifrom N t× N ccomplex matrix U in select N marrange and obtain.
6. method according to claim 5, is characterized in that, i-th of described complex matrix U is classified as f 1(v i, h i), wherein, f 1(v, h) is by N v× 1 vector v i,k, h i,kand N hthe vectorial h of × 1 is mapped to N tthe function of the vector of × 1, k=1 ..., N m, i=1 ..., N c, N cfor the columns of matrix U.
7. the method according to claim 3 or 6, is characterized in that, described in or f 1(v i, h i)=h iv i, or, f 1 ( v i , h i ) = v i , 1 h i · · · v i , Nv h i Or f 1 ( v i , h i ) = h i , 1 v i · · · h i , N h v i V i,kfor vector v ia kth element, k=1 ..., N v, h i,kfor vectorial h ia kth element, k=1 ..., N h, N vand N hfor positive integer, and N t=N v× N h, represent that kronecker amasss.
8. method according to claim 7, is characterized in that, described vector v ia kth element v i , k = 1 N v e j ( k - 1 ) θ i , K=1 ..., N v, vectorial h ia kth element h i , k = 1 N h e j ( k - 1 ) φ i , K=1 ..., N h, θ i, φ ispan is [0,2 π], i=1 ..., N c.
9. method according to claim 7, is characterized in that, described h ibe expressed as or h i = h ~ i ⊗ x , h i = α h ~ i β h ~ i Or h i = h ~ i , 1 x · · · h ~ i , N h 2 x , Wherein, x = 1 2 α β , α, β are plural number, for a jth element, n vwith for positive integer, and N t=N v× N h, represent that kronecker amasss.
10. method according to claim 9, is characterized in that, described vector v ia kth element v i , k = 1 N v e j ( k - 1 ) θ i , K=1 ..., N v, vector a kth element h ~ i , k = 1 N h e j ( k - 1 ) φ i , θ i, φ ispan is [0,2 π], i=1 ..., N c.
11. methods according to claim 9, is characterized in that, described in include but not limited to one of following form:
1 0 , 0 1 , 1 1 , 1 - 1 , 1 j , 1 - j , j 1 , j - 1 .
12. methods according to claim 5, is characterized in that, i-th of described complex matrix U is classified as f 2i, φ i), wherein, f 2θ, φ are mapped to N by (θ, φ) tthe function of the vector of × 1, θ i, φ ispan is [0,2 π], i=1, L, N c.
13. methods according to claim 4 or 12, is characterized in that, described f 2for by θ i, φ ibe mapped to N tl element of the vector of × 1 is or l element, i=1 ..., N c.
14. methods according to claim 1, is characterized in that, described in n mthe complex matrix of × υ, represent a jth code word of Equations of The Second Kind code book, j=1 ..., N s2, N s2for the code word number of Equations of The Second Kind code book, υ is the total number of plies information of data of described terminal, N mfor being less than N tpositive integer.
15. methods according to claim 1, is characterized in that, are determining the first matrix U iinformation and the second matrix after information, described method also comprises:
Terminal is according to the first matrix U iinformation and the second matrix information obtains channel related information and calculate channel quality indicator (CQI) according to W; Wherein, F is by matrix U i, be mapped to N t× υ ties up the function of matrix.
16. methods according to claim 1, is characterized in that, in terminal to report first matrix U iinformation and the second matrix after information, described method also comprises:
The first matrix U that base station is sent according to terminal iinformation and the second matrix information obtains channel related information W = F ( U i , P j V ) ;
Dispatch terminal according to W, and select downlink transmission mode to communicate with terminal, wherein downlink transmission mode includes but not limited to one or more in following transmission means:
Single user MIMO transmission pattern, Multi-user mimo transmissions pattern, single user/multi-user's switching at runtime transmission mode, coordinated multipoint transmission pattern.
17. 1 kinds of terminals, is characterized in that, described terminal comprises:
Matrix information determining unit, for measuring channel matrix H, and determines the first matrix U according to channel matrix H iinformation and the second matrix information;
Index information reports unit, for reporting instruction first matrix U iindex information and instruction the second matrix index information; Or,
Parameter information reports unit, for reporting structure first matrix U iparameter information and structure the second matrix parameter information.
CN201310319590.XA 2013-07-26 2013-07-26 Pre-coding matrix feedback method and terminal CN104348575A (en)

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