CN104283631A - Method and device for generating precoding matrix used in three-dimensional MIMO system and transmitter - Google Patents

Method and device for generating precoding matrix used in three-dimensional MIMO system and transmitter Download PDF

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Publication number
CN104283631A
CN104283631A CN201310282766.9A CN201310282766A CN104283631A CN 104283631 A CN104283631 A CN 104283631A CN 201310282766 A CN201310282766 A CN 201310282766A CN 104283631 A CN104283631 A CN 104283631A
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coding matrix
information
matrix
target
associating
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宋扬
云翔
陈岚
柿岛佑一
袁方
杨晨阳
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to CN201811541106.7A priority Critical patent/CN110266353B/en
Priority to CN201310282766.9A priority patent/CN104283631A/en
Priority to JP2014139186A priority patent/JP2015015717A/en
Publication of CN104283631A publication Critical patent/CN104283631A/en
Priority to JP2018235937A priority patent/JP2019041425A/en
Priority to JP2021074566A priority patent/JP2021108497A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Abstract

The embodiment of the invention provides a method and device for generating a precoding matrix used in a three-dimensional MIMO system and a transmitter. The method for generating the precoding matrix used in the three-dimensional MIMO system comprises the steps of obtaining a target horizontal information precoding matrix with respect to the horizontal component information of a three-dimensional channel between the transmitter and a receiver; obtaining a target vertical information precoding matrix with respect to the vertical component information of the three-dimensional channel between the transmitter and the receiver; obtaining a target united precoding matrix with respect to three-dimensional channel between the transmitter and the receiver; calculating the precoding matrix of the three-dimensional MIMO system according to the target horizontal information precoding matrix, the target vertical information precoding matrix and the target united precoding matrix.

Description

Generate method and apparatus and the transmitter of the pre-coding matrix being used for three-dimensional mimo system
Technical field
The present invention relates to method and apparatus and the transmitter of generating pre-coding matrix, more specifically, the present invention relates to a kind of generation and be used for the transmitter of the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system for the method for the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system and device and generation accordingly.
Background technology
In Long Term Evolution (LTE) communication system and LTE-Advanced communication system, multiple-input and multiple-output (MIMO) antenna system can be used in wireless base station and travelling carriage.In mimo systems, receive/send out at signal in machine many antennas are set, with by diversity or multiplexing raising systematic function.
In order to improve the availability of frequency spectrum of mimo system further, proposing can the azimuth (that is, horizontal direction angle) of control signal propagation and three dimensions (hereinafter referred to as " the three-dimensional ") mimo system of the angle of pitch (that is, vertical direction angle).But compared with the two-dimentional mimo system of traditional only controlling party parallactic angle, because the antenna amount adding the three-dimensional mimo system of antenna distribution is on the vertical axis large, channel dimension is high.This pre-coding matrix search causing three-dimensional mimo system and the calculation of complex generated, and code book needs to take larger memory space.
Such as, for the transmission channel (hereinafter referred to as " three dimensional channel ") in three-dimensional mimo system, can using by rotating codebook structure, obtaining pre-coding matrix for this channel or channel quantitative matrix (below for pre-coding matrix) C according to following formula (1):
C=W 1W 2 ……(1)
Wherein, W 1for the spatial correlation matrix of the statistics of three dimensional channel, W 2for reflecting the basic code word of the instantaneous and/or narrow band information of three dimensional channel, and by rotating W 1obtain the W being changed to this three dimensional channel applicable 2.
When Frequency Division Duplexing (FDD) (FDD) system for three-dimensional MIMO uses rotation codebook structure, need to prestore the spatial correlation matrix code book comprising multiple candidate spatial correlation matrix for three dimensional channel, and comprise the Basic codebook of the basic code word of multiple candidate.When pre-coding matrix selected by receiver, retrieve in the spatial correlation matrix code book prestored and Basic codebook, to obtain the three dimensional channel spatial correlation matrix W mated with the channel response of three dimensional channel 1with basic code word W 2.
Suppose that three-dimensional mimo system comprises the aerial array of 8 × 8, then each three dimensional channel spatial correlation matrix is of a size of 64 × 64.That is, in wireless base station and travelling carriage, all need larger memory space to store to code book, and the computation complexity generated when rotating pre-coding matrix C is very high.
In order to reduce complexity, proposing and horizontal information pre-coding matrix and vertical information pre-coding matrix are determined respectively for the horizontal direction of three dimensional channel and vertical direction, and generating the pre-coding matrix C of three dimensional channel, as shown in following formula (2),
C = W h W v T · · · · · · ( 2 )
Wherein, W hfor three dimensional channel horizontal information pre-coding matrix in the horizontal direction, W vfor three dimensional channel vertical information pre-coding matrix in vertical direction, for W vtransposed matrix.
In addition, all can use the above rotation codebook structure described in conjunction with formula (1) in each direction, thus obtain W by following formula (3) h, and obtain W by following formula (4) v.
W h=W h,1W h,2 ……(3)
W v=W v,1W v,2 ……(4)
Wherein, W h, 1for three dimensional channel spatial correlation matrix in the horizontal direction, pass through W h, 1rotation transformation obtain the basic code word W of this three dimensional channel applicable level in the horizontal direction h, 2.Similarly, W v, 1for three dimensional channel spatial correlation matrix in vertical direction, and pass through W v, 1rotation transformation obtain this three dimensional channel applicable vertical basic code word W in vertical direction v, 2.
Suppose that three-dimensional mimo system comprises the aerial array of 8 × 8, then W h, 1and W v, 1be the matrix of 8 × 8.Thus decrease the memory space taken required for code book, and reduce the computation complexity of generating pre-coding matrix.
But, pre-coding matrix structure and the actual three dimensional channel matrix difference to some extent of the three dimensional channel generated thus, and have identical information to be quantized in the horizontal direction and the vertical direction, cause quantified precision to reduce, produce quantization error.
Summary of the invention
In view of the above problems, generate the method and apparatus of the pre-coding matrix being used for three-dimensional multi-input multi-output system desirable to provide a kind of and generate the transmitter of the pre-coding matrix being used for three-dimensional multi-input multi-output system.
According to one embodiment of present invention, provide a kind of method generated for the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system, comprising: the target level information pre-coding matrix of the horizontal component information of the three dimensional channel between obtaining about transmitter and receiver; Obtain the target vertical information pre-coding matrix about the vertical component information of the three dimensional channel between transmitter and receiver; Obtain the target associating pre-coding matrix about the three dimensional channel between transmitter and receiver; And the pre-coding matrix of three-dimensional mimo system is calculated by target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.
According to another embodiment of the present invention, provide a kind of method generated for the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system, be applied to transmitter, described method comprises:
The first horizontal information designator of instruction first object horizontal information pre-coding matrix is received from receiver, indicate the second horizontal information designator of the second target level information pre-coding matrix, first vertical information designator of instruction first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix, wherein first object horizontal information pre-coding matrix instruction three dimensional channel in time and/or the horizontal component information that frequency band is added up, the horizontal component information of the instantaneous and/or arrowband of the second target level information pre-coding matrix instruction three dimensional channel, first object vertical information pre-coding matrix instruction three dimensional channel in time and/or the vertical component information that frequency band is added up, the vertical component information of the instantaneous and/or arrowband of the second target vertical information pre-coding matrix instruction three dimensional channel, according to the first horizontal information designator, from the first horizontal information code book prestored, obtain first object horizontal information pre-coding matrix, according to the second horizontal information designator, from the second horizontal information code book prestored, obtain the second target level information pre-coding matrix, according to the first vertical information designator, from the first vertical information code book prestored, obtain first object vertical information pre-coding matrix, according to the second vertical information designator, from the second vertical information code book prestored, obtain the second target vertical information pre-coding matrix, instantaneous and/or arrowband weighting coefficient matrix is obtained according to the second target level information pre-coding matrix and the second target vertical information pre-coding matrix, instantaneous and/or arrowband weighting coefficient matrix are corrected, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix, by first object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and the pre-coding matrix calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
According to another embodiment of the present invention, provide a kind of transmitter, comprise: receiving element, configuration carrys out the first horizontal information designator receiving instruction first object horizontal information pre-coding matrix from receiver, indicate the second horizontal information designator of the second target level information pre-coding matrix, first vertical information designator of instruction first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix, wherein first object horizontal information pre-coding matrix instruction three dimensional channel in time and/or the horizontal component information that frequency band is added up, the horizontal component information of the instantaneous and/or arrowband of the second target level information pre-coding matrix instruction three dimensional channel, first object vertical information pre-coding matrix instruction three dimensional channel in time and/or the vertical component information that frequency band is added up, the vertical component information of the instantaneous and/or arrowband of the second target vertical information pre-coding matrix instruction three dimensional channel, first level matrix acquiring unit, configuration comes according to the first horizontal information designator, from the first horizontal information code book prestored, obtains first object horizontal information pre-coding matrix, second level matrix acquiring unit, configuration comes according to the second horizontal information designator, from the second horizontal information code book prestored, obtains the second target level information pre-coding matrix, first vertical matrix acquiring unit, configuration comes according to the first vertical information designator, from the first vertical information code book prestored, obtains first object vertical information pre-coding matrix, second vertical matrix acquiring unit, configuration comes according to the second vertical information designator, from the second vertical information code book prestored, obtains the second target vertical information pre-coding matrix, weighting matrix acquiring unit, obtains instantaneous and/or arrowband weighting coefficient matrix according to the second target level information pre-coding matrix and the second target vertical information pre-coding matrix, weighting matrix correcting unit, configuration corrects instantaneous and/or arrowband weighting coefficient matrix, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix, computing unit, by first object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and the pre-coding matrix calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
According to another embodiment of the present invention, provide a kind of transmitter, comprise: receiving element, configuration come from receiver receive instruction long time/target level information pre-coding matrix long in broadband time/broadband horizontal message indicator, the target level information pre-coding matrix of instantaneous/arrowband instantaneous/narrow band level message indicator and instruction long time/target vertical information pre-coding matrix long in broadband time/broadband vertical message indicator, the target vertical information pre-coding matrix of instantaneous/arrowband instantaneous/arrowband vertical information designator, time wherein long/broadband, instantaneous/horizontal component the information of narrowband target horizontal information pre-coding matrix instruction three dimensional channel in time and/or on frequency band, and time long/broadband, instantaneous/vertical component the information of narrowband target vertical information pre-coding matrix instruction three dimensional channel in time and/or on frequency band, first matrix acquiring unit, configuration come according to time long/broadband horizontal message indicator, from prestore long time/broadband horizontal information code book, when obtaining long/the target level information pre-coding matrix of broadband, second matrix acquiring unit, configuration come according to instantaneous/narrow band level message indicator, from prestore instantaneous/narrow band level information code book, obtain instantaneous/narrowband target horizontal information pre-coding matrix, 3rd matrix acquiring unit, configuration come according to time long/broadband vertical message indicator, from prestore long time/broadband vertical information code book, when obtaining long/the target vertical information pre-coding matrix of broadband, 4th matrix acquiring unit, configuration come according to instantaneous/arrowband vertical information designator, from prestore instantaneous/arrowband vertical information code book, obtain instantaneous/narrowband target vertical information pre-coding matrix, 5th matrix acquiring unit, configuration comes to obtain instantaneous/arrowband weighting coefficient matrix according to instantaneous/narrowband target horizontal information pre-coding matrix and instantaneous/narrowband target vertical information pre-coding matrix, correcting unit, configuration instantaneous/arrowband weighting coefficient matrix is corrected, with obtain correction instantaneous/arrowband weighting coefficient matrix, computing unit, when configuration cause is long/broadband target level information pre-coding matrix, long time/broadband target vertical information pre-coding matrix and through overcorrect instantaneous/arrowband weighting coefficient matrix calculates the pre-coding matrix of three-dimensional mimo system.
Accompanying drawing explanation
Fig. 1 depicts according to one embodiment of the invention, generates the flow chart of the method for the pre-coding matrix being used for three-dimensional mimo system;
Fig. 2 shows when the method shown in Fig. 1 is applied to receiver, obtains the indicative flowchart of the method for target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.
Fig. 3 shows when the method shown in Fig. 1 is applied to transmitter, obtains the indicative flowchart of the method for target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.
Fig. 4 (a) shows the coding efficiency comparison diagram of the pre-coding matrix generation method 100 that the pre-coding matrix generation method that describes in conjunction with formula (2)-(4) describes with composition graphs 1, wherein in pre-coding matrix generation method 100, the matrix adopting the characteristic vector of horizontal channel spatial correlation matrix to form in horizontal information code book is as horizontal information pre-coding matrix and in vertical information code book, adopt matrix that the characteristic vector of vertical channel spatial correlation matrix is formed as vertical information pre-coding matrix.
Fig. 4 (b) shows the horizontal information pre-coding matrix adopting all characteristic vectors of horizontal channel spatial correlation matrix to form in horizontal information code book, and the pre-coding matrix generation method 100-a of the pre-coding matrix of the vertical information pre-coding matrix adopting all characteristic vectors of vertical channel spatial correlation matrix to form in vertical information code book and the horizontal information pre-coding matrix (i.e. the horizontal information pre-coding matrix of dimensionality reduction) adopting the part principal eigenvector of horizontal channel spatial correlation matrix to form in horizontal information code book, and the coding efficiency comparison diagram of the pre-coding matrix generation method 100-b of the pre-coding matrix (i.e. the vertical information pre-coding matrix of dimensionality reduction) of the vertical information pre-coding matrix adopting the part principal eigenvector of vertical channel spatial correlation matrix to form in vertical information code book.
Fig. 5 shows the exemplary block diagram of the device (below can referred to as pre-coding matrix generating apparatus) of the pre-coding matrix generated according to an embodiment of the invention for three-dimensional mimo system.
Fig. 6 shows the exemplary block diagram of the 3rd matrix acquiring unit according to an embodiment of the invention.
Fig. 7 shows the exemplary block diagram of the 3rd matrix acquiring unit according to another embodiment of the present invention.
Fig. 8 depicts according to another embodiment of the present invention, generates the flow chart of the method (can generate method referred to as pre-coding matrix below) of the pre-coding matrix being used for three-dimensional mimo system.
Fig. 9 illustrates and/or arrowband weighting coefficient matrix A instantaneous according to the acquisition of the second target level pre-coding matrix and the second target vertical pre-coding matrix.
Figure 10 shows the exemplary block diagram of transmitter according to an embodiment of the invention.
Embodiment
Hereinafter, the preferred embodiments of the present invention are described in detail with reference to accompanying drawing.Note, in the present description and drawings, there is substantially the same step and represent with the identical Reference numeral of element, and will be omitted the repetition of explanation of these steps and element.Subscript () in the examples below trepresent and transposition is carried out to matrix or vector, subscript () hrepresent and carry out conjugate transpose to matrix or vector, vec (A) represents to matrix A by column vector, " ο " for Hadamard product (Hadamard product) or by element product (Entrywise product), for Kronecker product (Kronecker product).
Fig. 1 depicts according to one embodiment of the invention, generates the flow chart of the method (can generate method referred to as pre-coding matrix below) 100 of the pre-coding matrix being used for three-dimensional mimo system.Below, with reference to Fig. 1, pre-coding matrix generation method 100 is according to an embodiment of the invention described.
As shown in Figure 1, in step S101, the target level information pre-coding matrix of the horizontal component information of the three dimensional channel between obtaining about transmitter and receiver.Preferably, target level information pre-coding matrix can indicate three dimensional channel in time and/or the horizontal component information that frequency band is added up.Such as, target level pre-coding matrix three dimensional channel can be indicated to add up in special time period, on frequency band long time and/or broadband horizontal component information.Alternatively, target level information pre-coding matrix also can indicate three dimensional channel particular moment and/or the horizontal component information in characteristic frequency (that is, instantaneous and/or arrowband).
According to an example of the present invention, target level information pre-coding matrix is made up of the characteristic vector of horizontal component information corresponding to the characteristic value of the horizontal component information of the three-dimensional mimo system being more than or equal to the first predetermined threshold.Such as, in order to ensure the quantified precision of the horizontal information for three dimensional channel of target level information pre-coding matrix, target level information pre-coding matrix can be made up of whole characteristic vectors of the spatial correlation matrix of horizontal component in three dimensional channel.But, when the number of characteristic vector is more, target level information pre-coding matrix can not be formed by whole characteristic vector.Preferably, for the ease of subsequent calculations, the characteristic vector of horizontal component information that can be corresponding by the larger characteristic value of the horizontal component information with three-dimensional mimo system forms target level information pre-coding matrix, to carry out dimensionality reduction to target level pre-coding matrix.Such as, target level pre-coding matrix can comprise the horizontal properties vector sum corresponding with the maximum horizontal characteristic value of the spatial correlation matrix of horizontal component in the three dimensional channel horizontal properties vector corresponding with second largest horizontal properties value.
In addition, according to another example of the present invention, described target level information pre-coding matrix can be selected from comprising the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring in step S101.For the number of different channel sequence (hereinafter referred to as channel sequence number), different horizontal information code books can be prestored.That is, according to the channel sequence number that may occur, the horizontal information code book corresponding to this channel sequence number is prestored.In step S101, according to channel sequence number, select target horizontal information pre-coding matrix from horizontal information code book that is corresponding to this channel sequence number, that prestore.Alternatively, also for the different channel sequence number that may occur, identical horizontal information code book can be prestored.That is, no matter the channel sequence number that receiver receives is how many, all horizontal information code book is prestored corresponding to identical.In the case, when the channel sequence number that receiver receives is greater than 1, the target level information pre-coding matrix of this multiple channel sequence can be identical.
When the target level information pre-coding matrix that hope obtains be by three dimensional channel in whole characteristic vectors of spatial correlation matrix of horizontal component form, each horizontal information pre-coding matrix prestored is formed by whole characteristic vectors of the spatial correlation matrix of horizontal component in three dimensional channel.And when the target level information pre-coding matrix that hope obtains is dimensionality reduction matrix, the each horizontal information pre-coding matrix prestored is formed by the characteristic vector of the horizontal component information corresponding with the characteristic value of horizontal component information of the three-dimensional mimo system being more than or equal to the first predetermined threshold, thus saves the memory space stored needed for code book.
Similar with step S101, in step s 102, the target vertical information pre-coding matrix of the vertical component information of the three dimensional channel between obtaining about transmitter and receiver.Preferably, target vertical information pre-coding matrix can indicate three dimensional channel in time and/or the vertical component information that frequency band is added up.Such as, target vertical pre-coding matrix three dimensional channel can be indicated to add up in special time period, on frequency band long time and/or broadband vertical component information.Alternatively, target vertical information pre-coding matrix also can indicate three dimensional channel in particular moment and/or the vertical component information in characteristic frequency (that is, instantaneous and/or arrowband).
According to an example of the present invention, target vertical information pre-coding matrix is made up of the characteristic vector of vertical component information corresponding to the characteristic value of the vertical component information of the three-dimensional mimo system being more than or equal to the second predetermined threshold.Such as, in order to ensure the quantified precision of the vertical information for three dimensional channel of target vertical information pre-coding matrix, target vertical information pre-coding matrix can be made up of whole characteristic vectors of the spatial correlation matrix of vertical component in three dimensional channel.But, when the number of characteristic vector is more, target vertical information pre-coding matrix can not be formed by whole characteristic vector.Preferably, for the ease of subsequent calculations, the characteristic vector of vertical component information that can be corresponding by the larger characteristic value of the vertical component information with three-dimensional mimo system forms target vertical information pre-coding matrix, to carry out dimensionality reduction to target vertical pre-coding matrix.Such as, target vertical pre-coding matrix can comprise the vertical features vector sum corresponding with the maximum perpendicular characteristic value of the spatial correlation matrix of vertical component in the three dimensional channel vertical features vector corresponding with second largest vertical features value.
In addition, according to another example of the present invention, described target vertical information pre-coding matrix can be selected from comprising the vertical information code book of multiple vertical information pre-coding matrix of prestoring in step s 102.For the different channel sequence number number that may occur, different vertical information code books can be prestored.That is, according to the channel sequence number that may occur, the vertical information code book corresponding to this number is prestored.In step s 102, according to channel sequence number, select target vertical information pre-coding matrix from vertical information code book that is corresponding to this channel sequence number, that prestore.Alternatively, also for the different channel sequence number that may occur, identical vertical information code book can be prestored.That is, no matter the channel sequence number that receiver receives is how many, all vertical information code book is prestored corresponding to identical.In the case, when the channel sequence number that receiver receives is greater than 1, the target vertical information pre-coding matrix of this multiple order can be identical.
When the target vertical information pre-coding matrix that hope obtains be by three dimensional channel in whole characteristic vectors of spatial correlation matrix of vertical component form, each vertical information pre-coding matrix prestored is formed by whole characteristic vectors of the spatial correlation matrix of vertical component in three dimensional channel.And when the target vertical information pre-coding matrix that hope obtains is dimensionality reduction matrix, each vertical information pre-coding matrix prestored is formed by the characteristic vector of the vertical component information corresponding with the characteristic value of vertical component information of the three-dimensional mimo system being more than or equal to the second predetermined threshold.Thus save the memory space stored needed for code book.
In step s 103, according to channel sequence number, combine pre-coding matrix from the select target the associating code book of multiple associating pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.Particularly, target associating pre-coding matrix can be the weighting coefficient matrix for horizontal component information and vertical component information.In addition, when there is multiple channel sequence, the target associating pre-coding matrix of multiple channel sequence is mutually orthogonal between two.
According to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel.Associating code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.In step s 103, can according to channel sequence number, combine pre-coding matrix from the selected phase target the phase combining code book of multiple phase combining pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.
According to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.Such as, target associating pre-coding matrix be amplitude target associating pre-coding matrix and phase object associating pre-coding matrix by element product.Preferably, amplitude target associating pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) amplitude information, and phase object associating pre-coding matrix can indicate three dimensional channel in particular moment and/or the phase information in characteristic frequency (that is, instantaneous and/or arrowband).
Associating code book comprises the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.In step s 103, can from the amplitude associating code book prestored selecting range target associating pre-coding matrix, and according to channel sequence number, from phase combining code book that is corresponding to this channel sequence number, that prestore, selected phase target combines pre-coding matrix.
When there is multiple channel sequence, the phase object associating pre-coding matrix of two adjacent channel sequence is mutually orthogonal.More specifically, for the different channel sequence number that may occur, different phase combining code books can be prestored.Such as, when channel sequence number=1 that may occur, phase combining code book={ [G can be prestored 1,1], [G 2,1] ..., [G m, 1], wherein M is the number of the phase combining pre-coding matrix in phase combining code book, and M is positive integer, and G is phase combining pre-coding matrix.When channel sequence number=2 that may occur, phase combining code book={ [G can be prestored 1,1, G 1,2], [G 2,1, G 2,2] ..., [G m, 1, G m, 2], wherein G i, 1, G i, 2orthogonal (i=1,2 ... M).As the channel sequence number=L that may occur (L is positive integer), phase combining code book={ [G can be prestored 1,1, G 1,2..., G 1, L], [G 2,1, G 2,2..., G 2, L] ..., [G m, 1, G m, 2..., G m,L], wherein G i, 1, G i, 2..., G i,Lpairwise orthogonal.Thus in step s 103, can according to channel sequence number, select described phase object to combine pre-coding matrix from corresponding to this channel sequence number, comprising the phase combining code book of multiple phase combining pre-coding matrix of prestoring, and the phase object of adjacent two channel sequence associating pre-coding matrix is mutually orthogonal.
Fig. 2 shows when the method shown in Fig. 1 is applied to receiver, obtains the indicative flowchart of the method for target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.
As shown in Figure 2, in step s 201, by the three dimensional channel response between transmitter and receiver, described horizontal channel component information and described vertical channel component information is calculated.Such as, estimate that the three dimensional channel between transmitter and receiver responds by receiver from the pilot signal that transmitter receives.
Then, in step S202, retrieve in horizontal information code book, to obtain with the horizontal information pre-coding matrix of horizontal channel information matches as target level information pre-coding matrix.In addition, in step S203, retrieve in vertical information code book, to obtain with the vertical information pre-coding matrix of vertical channel information matches as target vertical information pre-coding matrix.
Then, in step S204, respond according to target level information pre-coding matrix, target vertical information pre-coding matrix and three dimensional channel, according to the channel sequence number that receiver is determined, combine pre-coding matrix from the select target the associating code book of multiple associating pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.Such as, the order number making channel capacity maximum can be defined as channel sequence number by receiver.
As mentioned above, according to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel, and to combine code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.In step S204, can according to channel sequence number, for each phase combining pre-coding matrix in the phase combining code book corresponding to this channel sequence number, candidate's pre-coding matrix of the three-dimensional mimo system calculated by target level information pre-coding matrix, target vertical information pre-coding matrix and this associating pre-coding matrix, and combine pre-coding matrix using with the phase combining pre-coding matrix corresponding to candidate's pre-coding matrix of three dimensional channel responses match as target phase.
In addition, according to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.In addition, combine code book and comprise the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.In step S204, can first by the response of target level information pre-coding matrix, target vertical information pre-coding matrix and three dimensional channel, computing reference matrix.Retrieve in amplitude associating code book, combine pre-coding matrix and combine pre-coding matrix to obtain the amplitude of mating with R-matrix as target amplitude.
Preferably, when calculating long by following formula (5) and or broadband on the element ω of R-matrix Ω ' that adds up i' , j:
ω i , j ′ = E { | W h H ( : , i ) HW v ( : , j ) | 2 } 1 / 2 . . . . . . ( 5 )
Wherein, W h(:, target level information pre-coding matrix W i) for retrieving hi-th row (i.e. i-th characteristic vector of horizontal channel information), H be three dimensional channel respond, W v(:, target vertical information pre-coding matrix W j) for retrieving vjth row (i.e. a jth characteristic vector of vertical channel information).ω i' , jrepresent three-dimensional propagation characteristic vector the range value of corresponding weight coefficient.
Then, according to channel sequence number, for each phase combining pre-coding matrix in the phase combining code book corresponding to this channel sequence number, candidate's pre-coding matrix of the three-dimensional mimo system calculated by target level information pre-coding matrix, target vertical information pre-coding matrix, target amplitude associating pre-coding matrix and this associating pre-coding matrix, and combine pre-coding matrix using with the phase combining pre-coding matrix corresponding to candidate's pre-coding matrix of three dimensional channel responses match as target phase.
Such as, when channel sequence is 1, the pre-coding matrix for the three-dimensional mimo system of matrix representation obtains phase object associating pre-coding matrix by following formula (6):
G = arg max G i | vec ( H H ) · vec { C } | 2 . . . . . . ( 6 )
That is, make | vec (H h) vec{C}| 2reach the phase combining pre-coding matrix G of maximum ifor phase object associating pre-coding matrix.Wherein W hfor target level information pre-coding matrix, W vfor target vertical information pre-coding matrix, Ω is target amplitude associating pre-coding matrix, G ifor the phase combining pre-coding matrix in phase combining code book, i is the numbering of the phase combining pre-coding matrix in phase combining code book.
Then, according to target phase associating pre-coding matrix and target amplitude associating pre-coding matrix, such as, by by element product, calculate target associating pre-coding matrix.
Fig. 3 shows when the method shown in Fig. 1 is applied to transmitter, obtains the indicative flowchart of the method for target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.
As shown in Figure 3, in step S301, receive the 3rd designator of the first designator of indicating target horizontal information pre-coding matrix, the second designator of indicating target vertical information pre-coding matrix and indicating target associating pre-coding matrix from receiver.In step s 302, the channel sequence number designator being used to indicate channel sequence number is received from receiver.Then, in step S303, in horizontal information code book, obtain the horizontal information pre-coding matrix corresponding with the first designator as target level information pre-coding matrix.In addition, in step s 304, in vertical information code book, the vertical information pre-coding matrix corresponding with the second designator is obtained as target vertical information pre-coding matrix.In addition, in step S305, in the associating code book corresponding to this channel sequence number, the associating pre-coding matrix corresponding with described 3rd designator is obtained as described phase combining pre-coding matrix.
As mentioned above, according to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel, and to combine code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.In the case, the phase place designator of the 3rd designator instruction phase object associating pre-coding matrix.In step S305, according to channel sequence number designator determination channel sequence number, then in the phase combining code book corresponding to this channel sequence number, the phase combining pre-coding matrix corresponding with the 3rd designator can be obtained and combine pre-coding matrix as target phase.
In addition, according to an example of the present invention, target associating pre-coding matrix obtains by the amplitude target of the amplitude about three dimensional channel associating pre-coding matrix with about the phase object associating pre-coding matrix of the phase place of three dimensional channel, and combine code book and comprise the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.In the case, the 3rd designator can comprise the phase place designator of instruction phase object associating pre-coding matrix and the amplitude designator of indicator range target associating pre-coding matrix.In step S305, in amplitude associating code book, obtain the amplitude corresponding with amplitude designator to combine pre-coding matrix and combine pre-coding matrix as amplitude target, on the other hand, according to channel sequence number designator determination channel sequence number, then, in the phase combining code book corresponding to this channel sequence number, obtain the phase combining pre-coding matrix corresponding with the 3rd designator and combine pre-coding matrix as target phase.Then, according to target phase associating pre-coding matrix and target amplitude associating pre-coding matrix, such as, by by element product, calculate target associating pre-coding matrix.
It should be noted that each step of the method shown in Fig. 3 need not perform according to shown order.Can put upside down or perform some step concurrently.Such as, the first designator of indicating target horizontal information pre-coding matrix can be received from receiver simultaneously, second designator of indicating target vertical information pre-coding matrix and indicating target are combined the 3rd designator (step S301) of pre-coding matrix and are received the channel sequence number designator (step S302) being used to indicate channel sequence number from receiver, in addition, also first can perform and receive from receiver the channel sequence number designator (step S302) being used to indicate channel sequence number, perform the first designator receiving indicating target horizontal information pre-coding matrix from receiver again, 3rd designator (step S301) of the second designator of indicating target vertical information pre-coding matrix and indicating target associating pre-coding matrix.
Return Fig. 1, in step S104, calculate the pre-coding matrix of three-dimensional mimo system by each target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.Particularly, in addition, for each channel sequence number, calculated the pre-coding matrix of the three-dimensional mimo system of this channel sequence number by the target level information pre-coding matrix of this channel sequence number, described target vertical information pre-coding matrix and described target associating pre-coding matrix.
Such as, for the channel sequence number of often kind of channel, calculate the pre-coding matrix of the three-dimensional mimo system of this channel sequence number according to target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix by following formula (7):
Wherein the dimension of the pre-coding matrix C of three-dimensional mimo system is t h× t v, t hfor horizontal direction number of antennas, t vfor vertical direction number of antennas, and t hand t vfor positive integer, W hfor target level information pre-coding matrix, W vfor target vertical information pre-coding matrix, Ω is target amplitude associating pre-coding matrix, and G is target phase associating pre-coding matrix.
Alternatively, as shown in formula (8), for each channel sequence number, the three-dimensional precoding vector c of pre-coding matrix by column vector of three-dimensional mimo system can be obtained:
Separate target level pre-coding matrix and target vertical pre-coding matrix is being have employed according in the pre-coding matrix generation method of the present embodiment, compare with the method that three dimensional channel spin matrix calculates pre-coding matrix with above-mentioned employing three dimensional channel correlation matrix, the space of storage code book required in travelling carriage can be reduced, when retrieving channel matrix in the codebook, decrease the time of the required cost of traversal code book, and simplify further by the calculating needed for channel matrix acquisition pre-coding matrix.
In addition, pre-coding matrix is being combined as the weighting coefficient matrix for target level pre-coding matrix and target vertical pre-coding matrix according to have employed target in the pre-coding matrix generation method of the present embodiment, the channel correlation matrix be separated with vertical direction in the horizontal direction with above-mentioned employing calculates compared with the method for pre-coding matrix, the pre-coding matrix structure of the three dimensional channel generated is more close with actual three dimensional channel matrix, and improve quantified precision, thus decrease error.
It should be noted that each step of the method shown in Fig. 1 need not perform according to shown order.Can put upside down or perform some step concurrently.Such as, in the example that composition graphs 2 describes, can perform simultaneously obtain target level information pre-coding matrix (namely, step S202, corresponding to step S101) and obtain target vertical information pre-coding matrix (that is, step S203, corresponding to step S102), then target associating pre-coding matrix (that is, step S204, corresponding to step S103) is obtained according to acquisition target level information pre-coding matrix and target vertical information pre-coding matrix.Again such as, in the example that composition graphs 3 describes, can perform simultaneously obtain target level information pre-coding matrix (namely, step S302, corresponding to step S101), obtain target vertical information pre-coding matrix (that is, step S303, corresponding to step S102), and obtain target level information pre-coding matrix and target vertical information pre-coding matrix acquisition target associating pre-coding matrix (that is, step S304, corresponding to step S103).
In addition, when being applied to receiver, the method shown in Fig. 1 also can comprise the 3rd designator being used to indicate the first designator of determined target level information pre-coding matrix, the second designator of indicating target vertical information pre-coding matrix and indicating target associating pre-coding matrix to transmitter transmission.And the channel sequence number designator being used to indicate channel sequence number is sent to transmitter.
Particularly, very first time interval and the first band separation can send the first designator, send the second designator with second time interval and the second band separation, send the 3rd designator with the 3rd time interval and the 3rd band separation.According to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel.As mentioned above, target level information pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) horizontal component information, target vertical information pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) vertical component information, phase object associating pre-coding matrix can indicate the phase information of three dimensional channel on particular moment and/or characteristic frequency (that is, instantaneous and/or arrowband).Therefore, preferably, very first time interval and second time interval can be greater than for the 3rd time interval and the first band separation and the second band separation can be greater than the 3rd band separation.
According to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.In addition, the 3rd designator can comprise the phase place designator of instruction phase object associating pre-coding matrix and the amplitude designator of indicator range target associating pre-coding matrix.In the case, very first time interval and the first band separation can send the first designator, send the second designator with second time interval and the second band separation, send phase place designator with the 3rd time interval and the 3rd band separation and send amplitude designator with the 4th time interval and the 4th band separation.Because amplitude target associating pre-coding matrix can indicate three dimensional channel in time and/or the amplitude information that frequency band is added up.In addition, very first time interval, second time interval and the 4th time interval can be more than or equal to for the 3rd time interval, and the first band separation, the second band separation and the 4th band separation can be more than or equal to the 3rd band separation.
Fig. 4 (a) shows the coding efficiency comparison diagram of the pre-coding matrix generation method 100 that the pre-coding matrix generation method that describes in conjunction with formula (2)-(4) describes with composition graphs 1, wherein in pre-coding matrix generation method 100, the matrix adopting the characteristic vector of horizontal channel spatial correlation matrix to form in horizontal information code book is as horizontal information pre-coding matrix and in vertical information code book, adopt matrix that the characteristic vector of vertical channel spatial correlation matrix is formed as vertical information pre-coding matrix.As shown in Figure 14 (a), when test condition is identical, the coding efficiency of the pre-coding matrix generation method 1400 that the coding efficiency ratio of pre-coding matrix generation method 100 describes in conjunction with formula (2)-(4) improves about 10%.
Fig. 4 (b) shows the horizontal information pre-coding matrix adopting all characteristic vectors of horizontal channel spatial correlation matrix to form in horizontal information code book, and the pre-coding matrix generation method 100-a of the pre-coding matrix of the vertical information pre-coding matrix adopting all characteristic vectors of vertical channel spatial correlation matrix to form in vertical information code book and the horizontal information pre-coding matrix (i.e. the horizontal information pre-coding matrix of dimensionality reduction) adopting the part principal eigenvector of horizontal channel spatial correlation matrix to form in horizontal information code book, and the coding efficiency comparison diagram of the pre-coding matrix generation method 100-b of the pre-coding matrix (i.e. the vertical information pre-coding matrix of dimensionality reduction) of the vertical information pre-coding matrix adopting the part principal eigenvector of vertical channel spatial correlation matrix to form in vertical information code book.As shown in Figure 14 (a), when test condition is identical, pre-coding matrix generation method 100-a is almost identical with the coding efficiency of pre-coding matrix generation method 100-b.That is, the horizontal information pre-coding matrix of employing dimensionality reduction and vertical information pre-coding matrix, while decreasing the memory space required for code book, have an impact to coding efficiency hardly.
Fig. 5 shows the exemplary block diagram of the device (below can referred to as pre-coding matrix generating apparatus) 500 of the pre-coding matrix generated according to an embodiment of the invention for three-dimensional mimo system.As shown in Figure 5, the pre-coding matrix generating apparatus 500 of the present embodiment comprises the first matrix acquiring unit 510, second matrix acquiring unit 520, the 3rd matrix acquiring unit 530 and computing unit 540.The unit of pre-coding matrix generating apparatus 500 can perform each step/function of the pre-coding matrix generation method 100 in above-mentioned Fig. 1 respectively.Therefore, only the critical piece of pre-coding matrix generating apparatus 500 is described below, and eliminates the detail content that above composition graphs 1 described.
The target level information pre-coding matrix of the horizontal component information of the three dimensional channel between the first matrix acquiring unit 510 can obtain about transmitter and receiver.Preferably, target level information pre-coding matrix can indicate three dimensional channel in time and/or the horizontal component information that frequency band is added up.Such as, target level pre-coding matrix when long (that is, and/or broadband) horizontal component information that three dimensional channel can be indicated to add up in special time period, on frequency band.Alternatively, target level information pre-coding matrix also can indicate three dimensional channel on particular moment and/or horizontal component information in characteristic frequency (that is, instantaneous and/or arrowband).
According to an example of the present invention, target level information pre-coding matrix is made up of the characteristic vector of horizontal component information corresponding to the characteristic value of the horizontal component information of the three-dimensional mimo system being more than or equal to the first predetermined threshold.Such as, in order to ensure the quantified precision of the horizontal information for three dimensional channel of target level information pre-coding matrix, target level information pre-coding matrix can be made up of whole characteristic vectors of the spatial correlation matrix of horizontal component in three dimensional channel.But, when the number of characteristic vector is more, target level information pre-coding matrix can not be formed by whole characteristic vector.Preferably, for the ease of subsequent calculations, the characteristic vector of horizontal component information that can be corresponding by the larger characteristic value of the horizontal component information with three-dimensional mimo system forms target level information pre-coding matrix, to carry out dimensionality reduction to target level pre-coding matrix.Such as, target level pre-coding matrix can comprise the horizontal properties vector sum corresponding with the maximum horizontal characteristic value of the spatial correlation matrix of horizontal component in the three dimensional channel horizontal properties vector corresponding with second largest horizontal properties value.
In addition, according to another example of the present invention, the first matrix acquiring unit 510 can select described target level information pre-coding matrix from comprising the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring.For the channel sequence number that may occur, different horizontal information code books can be prestored.That is, according to the channel sequence number that may occur, the horizontal information code book corresponding to this channel sequence number is prestored.First matrix acquiring unit 510 according to channel sequence number, select target horizontal information pre-coding matrix from horizontal information code book that is corresponding to this channel sequence number, that prestore.Alternatively, also for the different channel sequence number that may occur, identical horizontal information code book can be prestored.That is, no matter the number of the channel sequence of receiver reception is how many, all horizontal information code book is prestored corresponding to identical.In the case, when the channel sequence number that receiver receives is greater than 1, the target level information pre-coding matrix of multiple channel sequence can be identical.
When the target level information pre-coding matrix that hope obtains be by three dimensional channel in whole characteristic vectors of spatial correlation matrix of horizontal component form, each horizontal information pre-coding matrix prestored is formed by whole characteristic vectors of the spatial correlation matrix of horizontal component in three dimensional channel.And when the target level information pre-coding matrix that hope obtains is dimensionality reduction matrix, the each horizontal information pre-coding matrix prestored is formed by the characteristic vector of the horizontal component information corresponding with the characteristic value of horizontal component information of the three-dimensional mimo system being more than or equal to the first predetermined threshold, thus saves the memory space stored needed for code book.
The target vertical information pre-coding matrix of the vertical component information of the three dimensional channel between can obtaining about transmitter and receiver with the first matrix acquiring unit 510, second matrix acquiring unit 520.Preferably, target vertical information pre-coding matrix can indicate three dimensional channel in time and/or the vertical component information that frequency band is added up.Such as, target vertical pre-coding matrix when long (that is, and/or broadband) vertical component information that three dimensional channel can be indicated to add up in special time period, on frequency band.Alternatively, target vertical information pre-coding matrix also can indicate the vertical component information of three dimensional channel on particular moment and/or characteristic frequency (that is, instantaneous and/or arrowband).
According to an example of the present invention, target vertical information pre-coding matrix is made up of the characteristic vector of vertical component information corresponding to the characteristic value of the vertical component information of the three-dimensional mimo system being more than or equal to the second predetermined threshold.Such as, in order to ensure the quantified precision of the vertical information for three dimensional channel of target vertical information pre-coding matrix, target vertical information pre-coding matrix can be made up of whole characteristic vectors of the spatial correlation matrix of vertical component in three dimensional channel.But, when the number of characteristic vector is more, target vertical information pre-coding matrix can not be formed by whole characteristic vector.Preferably, for the ease of subsequent calculations, the characteristic vector of vertical component information that can be corresponding by the larger characteristic value of the vertical component information with three-dimensional mimo system forms target vertical information pre-coding matrix, to carry out dimensionality reduction to target vertical pre-coding matrix.Such as, target vertical pre-coding matrix can comprise the vertical features vector sum corresponding with the maximum perpendicular characteristic value of the spatial correlation matrix of vertical component in the three dimensional channel vertical features vector corresponding with second largest vertical features value.
In addition, according to another example of the present invention, the second matrix acquiring unit 520 can select described target vertical information pre-coding matrix from comprising the vertical information code book of multiple vertical information pre-coding matrix of prestoring.For the different channel sequence number that may occur, different vertical information code books can be prestored.That is, according to the channel sequence number that may transmit, the vertical information code book corresponding to this channel sequence number is prestored.Second matrix acquiring unit 520 according to channel sequence number, select target vertical information pre-coding matrix from vertical information code book that is corresponding to this channel sequence number, that prestore.Alternatively, also for the different channel sequence number that may transmit, identical vertical information code book can be prestored.That is, no matter the channel sequence number that receiver receives is how many, all vertical information code book is prestored corresponding to identical.In the case, when the channel sequence number that receiver receives is greater than 1, the target vertical information pre-coding matrix of multiple channel sequence can be identical.
When the target vertical information pre-coding matrix that hope obtains be by three dimensional channel in whole characteristic vectors of spatial correlation matrix of vertical component form, each vertical information pre-coding matrix prestored is formed by whole characteristic vectors of the spatial correlation matrix of vertical component in three dimensional channel.And when the target vertical information pre-coding matrix that hope obtains is dimensionality reduction matrix, each vertical information pre-coding matrix prestored is formed by the characteristic vector of the vertical component information corresponding with the characteristic value of vertical component information of the three-dimensional mimo system being more than or equal to the second predetermined threshold.Thus save the memory space stored needed for code book.
3rd matrix acquiring unit 530, according to channel sequence number, combines pre-coding matrix from the select target the associating code book of multiple associating pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.Particularly, target associating pre-coding matrix can be the weighting coefficient matrix for horizontal component information and vertical component information.In addition, when channel sequence number is greater than 1, the target associating pre-coding matrix of multiple channel sequence is mutually orthogonal between two.
According to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel.Associating code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.3rd matrix acquiring unit 530 can according to channel sequence number, combines pre-coding matrix from the selected phase target the phase combining code book of multiple phase combining pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.
According to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.Such as, target associating pre-coding matrix be amplitude target associating pre-coding matrix and phase object associating pre-coding matrix by element product.Preferably, amplitude target associating pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) amplitude information, and phase object associating pre-coding matrix can indicate the phase information of three dimensional channel on particular moment and/or characteristic frequency (that is, instantaneous and/or arrowband).
Associating code book comprises the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.3rd matrix acquiring unit 530 selecting range target can combine pre-coding matrix from the amplitude associating code book prestored, and according to channel sequence number, from phase combining code book that is corresponding to this channel sequence number, that prestore, selected phase target combines pre-coding matrix.
When channel sequence number is greater than 1, the phase object associating pre-coding matrix of two adjacent channel sequence is mutually orthogonal.More specifically, for the different channels order number of the different channel sequence number that may transmit, different phase combining code books can be prestored.Such as, when channel sequence number=1 that may transmit, phase combining code book={ [G can be prestored 1,1], [G 2,1] ..., [G m, 1], wherein M is the number of the phase combining pre-coding matrix in phase combining code book, and M is positive integer, and G is phase combining pre-coding matrix.When channel sequence number=2 that may transmit, phase combining code book={ [G can be prestored 1,1, G 1,2], [G 2,1, G 2,2] ..., [G m, 1, G m, 2], wherein G i, 1, G i, 2orthogonal (i=1,2 ... M).As the channel sequence number=L that may transmit (L is positive integer), phase combining code book={ [G can be prestored 1,1, G 1,2..., G 1, L], [G 2,1, G 2,2..., G 2, L] ..., [G m, 1, G m, 2..., G m,L], wherein G i, 1, G i, 2..., G i,Lpairwise orthogonal.Thus in step s 103, can according to channel sequence number, select described phase object to combine pre-coding matrix from corresponding to this channel sequence number, comprising the phase combining code book of multiple phase combining pre-coding matrix of prestoring, and the phase object of adjacent two channel sequence associating pre-coding matrix is mutually orthogonal.
According to an example of the present invention, when the device 500 shown in Fig. 5 is receivers, device 500 also can comprise information acquisition unit.Information acquisition unit, by the three dimensional channel response between transmitter and receiver, calculates described horizontal channel component information and described vertical channel component information.Such as, from the pilot signal that transmitter receives, information acquisition unit estimates that the three dimensional channel between transmitter and receiver responds by receiver.
Then, the first matrix acquiring unit 510 is retrieved in horizontal information code book, to obtain with the horizontal information pre-coding matrix of horizontal channel information matches as target level information pre-coding matrix.In addition, the second matrix acquiring unit 520 is retrieved in vertical information code book, to obtain with the vertical information pre-coding matrix of vertical channel information matches as target vertical information pre-coding matrix.
Then, 3rd matrix acquiring unit 530 can respond according to target level information pre-coding matrix, target vertical information pre-coding matrix and three dimensional channel, according to channel sequence number, combine pre-coding matrix from the select target the associating code book of multiple associating pre-coding matrix that comprises that is corresponding to this channel sequence number, that prestore.
As mentioned above, according to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel, and to combine code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.3rd matrix acquiring unit 530 can according to channel sequence number, for each phase combining pre-coding matrix in the phase combining code book corresponding to this channel sequence number, candidate's pre-coding matrix of the three-dimensional mimo system calculated by target level information pre-coding matrix, target vertical information pre-coding matrix and this associating pre-coding matrix, and the phase combining pre-coding matrix corresponding to candidate's pre-coding matrix of the three-dimensional mimo system with three dimensional channel responses match is combined pre-coding matrix as target phase.
In addition, according to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.In addition, combine code book and comprise the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.Fig. 6 shows the exemplary block diagram of the 3rd matrix acquiring unit 530 according to an embodiment of the invention.3rd matrix acquiring unit 530 can comprise R-matrix acquisition module 610, magnitude matrix acquisition module 620 and phasing matrix acquisition module 630.Particularly, R-matrix acquisition module 610 can first by the response of target level information pre-coding matrix, target vertical information pre-coding matrix and three dimensional channel, computing reference matrix.Magnitude matrix acquisition module 620 can be combined in code book in amplitude and retrieved, and combines pre-coding matrix and combines pre-coding matrix to obtain the amplitude of mating with R-matrix as target amplitude.Preferably, when calculating long by above formula (5) and or broadband on the R-matrix added up, do not repeat them here.
Then, phasing matrix acquisition module 630 is according to channel sequence number, for each phase combining pre-coding matrix in the phase combining code book corresponding to this channel sequence number, candidate's pre-coding matrix of the three-dimensional mimo system calculated by target level information pre-coding matrix, target vertical information pre-coding matrix, target amplitude associating pre-coding matrix and this associating pre-coding matrix, and combine pre-coding matrix using with the phase combining pre-coding matrix corresponding to candidate's pre-coding matrix of three dimensional channel responses match as target phase.
Then, the 3rd matrix acquiring unit 530 can combine pre-coding matrix and target amplitude associating pre-coding matrix according to target phase, such as, by by element product, calculates target associating pre-coding matrix.
According to another example of the present invention, when the device 500 shown in Fig. 5 also can be receiver, device 500 also can comprise receiving element.Receiving element can receive the 3rd designator of the first designator of indicating target horizontal information pre-coding matrix, the second designator of indicating target vertical information pre-coding matrix and indicating target associating pre-coding matrix from receiver, and receives the channel sequence number designator being used to indicate channel sequence number from receiver.And receiving element can receive from receiver the channel sequence number designator being used to indicate channel sequence number.
Then, the first matrix acquiring unit 510 in horizontal information code book, can obtain the horizontal information pre-coding matrix corresponding with the first designator as target level information pre-coding matrix.Second matrix acquiring unit 520 in vertical information code book, can obtain the vertical information pre-coding matrix corresponding with the second designator as target vertical information pre-coding matrix.In addition, the 3rd matrix acquiring unit 530 in the associating code book corresponding to this channel sequence number, can obtain the associating pre-coding matrix corresponding with described 3rd designator as described phase combining pre-coding matrix.
As mentioned above, according to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel, and to combine code book can be the phase combining code book comprising multiple phase combining pre-coding matrix.In the case, the phase place designator of the 3rd designator instruction phase object associating pre-coding matrix.3rd matrix acquiring unit 530 according to channel sequence number designator determination channel sequence number, then in the phase combining code book corresponding to this channel sequence number, can obtain the phase combining pre-coding matrix corresponding with the 3rd designator and combines pre-coding matrix as target phase.
In addition, according to an example of the present invention, target associating pre-coding matrix obtains by the amplitude target of the amplitude about three dimensional channel associating pre-coding matrix with about the phase object associating pre-coding matrix of the phase place of three dimensional channel, and combine code book and comprise the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix.In the case, the 3rd designator can comprise the phase place designator of instruction phase object associating pre-coding matrix and the amplitude designator of indicator range target associating pre-coding matrix.Fig. 7 shows the exemplary block diagram of the 3rd matrix acquiring unit 530 according to another embodiment of the present invention.3rd matrix acquiring unit 530 can comprise magnitude matrix acquisition module 710, channel sequence number determination module 720 and phasing matrix acquisition module 730.Particularly, magnitude matrix acquisition module 710 can be combined in code book in amplitude, obtain the amplitude corresponding with amplitude designator to combine pre-coding matrix and combine pre-coding matrix as amplitude target, on the other hand, channel sequence number determination module 720 can according to channel sequence number designator determination channel sequence number, then phasing matrix acquisition module 730 in the phase combining code book corresponding to this channel sequence number, can obtain the phase combining pre-coding matrix corresponding with the 3rd designator and combines pre-coding matrix as target phase.Then, the 3rd matrix acquiring unit 530 can combine pre-coding matrix and target amplitude associating pre-coding matrix according to target phase, such as, by by element product, calculates target associating pre-coding matrix.
Return Fig. 5, computing unit 540 calculates the pre-coding matrix of three-dimensional mimo system by each target level information pre-coding matrix, target vertical information pre-coding matrix and target associating pre-coding matrix.Particularly, in addition, for each channel sequence number that may occur, calculated the pre-coding matrix of the three-dimensional mimo system of this channel sequence number by the target level information pre-coding matrix of this channel sequence number, described target vertical information pre-coding matrix and described target associating pre-coding matrix.
Separate target level pre-coding matrix and target vertical pre-coding matrix is being have employed according in the pre-coding matrix generation sole duty of the present embodiment, compare with the device that three dimensional channel spin matrix calculates pre-coding matrix with above-mentioned employing three dimensional channel correlation matrix, the space of storage code book required in travelling carriage can be reduced, when retrieving channel matrix in the codebook, decrease the time of the required cost of traversal code book, and simplify further by the calculating needed for channel matrix acquisition pre-coding matrix.
In addition, pre-coding matrix is being combined as the weighting coefficient matrix for target level pre-coding matrix and target vertical pre-coding matrix according to have employed target in the pre-coding matrix generating apparatus of the present embodiment, the channel correlation matrix be separated with vertical direction in the horizontal direction with above-mentioned employing calculates compared with the device of pre-coding matrix, the pre-coding matrix structure of the three dimensional channel generated is more close with actual three dimensional channel matrix, and improve quantified precision, thus decrease error.
In addition, when device 500 is receivers, the device shown in Fig. 5 also can comprise transmitting element.Transmitting element can send to transmitter the 3rd designator being used to indicate the first designator of determined target level information pre-coding matrix, the second designator of indicating target vertical information pre-coding matrix and indicating target associating pre-coding matrix.And the channel sequence number designator being used to indicate the channel sequence number of channel sequence number is sent to transmitter.
Particularly, transmitting element very first time interval and the first band separation can send the first designator, sends the second designator with second time interval and the second band separation, sends the 3rd designator with the 3rd time interval and the 3rd band separation.According to an example of the present invention, target associating pre-coding matrix can be the phase object associating pre-coding matrix about the phase place of three dimensional channel.As mentioned above, target level information pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) horizontal component information, target vertical information pre-coding matrix can indicate three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) vertical component information, phase object associating pre-coding matrix can indicate the phase information of three dimensional channel on particular moment and/or characteristic frequency (that is, instantaneous and/or arrowband).Therefore, preferably, very first time interval and second time interval can be greater than for the 3rd time interval and the first band separation and the second band separation can be greater than the 3rd band separation.
According to another example of the present invention, target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about three dimensional channel and the phase object associating pre-coding matrix about the phase place of three dimensional channel obtain.In addition, the 3rd designator can comprise the phase place designator of instruction phase object associating pre-coding matrix and the amplitude designator of indicator range target associating pre-coding matrix.In the case, transmitting element very first time interval and the first band separation can send the first designator, send the second designator with second time interval and the second band separation, send phase place designator with the 3rd time interval and the 3rd band separation and send amplitude designator with the 4th time interval and the 4th band separation.Because amplitude target associating pre-coding matrix can indicate three dimensional channel in time and/or the amplitude information that frequency band is added up.In addition, very first time interval, second time interval and the 4th time interval can be more than or equal to for the 3rd time interval, and the first band separation, the second band separation and the 4th band separation can be more than or equal to the 3rd band separation.
Fig. 8 depicts according to another embodiment of the present invention, generates the flow chart of the method (can generate method referred to as pre-coding matrix below) 800 of the pre-coding matrix being used for three-dimensional mimo system.Below, with reference to Fig. 8, pre-coding matrix generation method 800 is according to an embodiment of the invention described.Pre-coding matrix generation method 800 can be applicable to transmitter.
As shown in Figure 8, in step S801, receive from receiver and indicate the first horizontal information designator of first object horizontal information pre-coding matrix, indicate the second horizontal information designator of the second target level information pre-coding matrix, indicate the first vertical information designator of first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix.Particularly, first object horizontal information pre-coding matrix instruction three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) horizontal component information, second target level information pre-coding matrix instruction three dimensional channel on particular moment and/or characteristic frequency (namely, instantaneous and/or arrowband) horizontal component information, first object vertical information pre-coding matrix instruction three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) vertical component information, second target vertical information pre-coding matrix instruction three dimensional channel on particular moment and/or characteristic frequency (namely, instantaneous and/or arrowband) vertical component information.
Then, in step S801, according to the first horizontal information designator, from the first horizontal information code book, obtain first object horizontal information pre-coding matrix.Prestore the first horizontal information code book, and the first horizontal information code book can comprise multiple first horizontal information pre-coding matrix.Similarly, according to the second horizontal information designator in step S802, from the second horizontal information code book, obtain the second target level information pre-coding matrix.Prestore the second horizontal information code book, and the second horizontal information code book can comprise multiple second horizontal information pre-coding matrix.In step S803, according to the first vertical information designator, from the first vertical information code book, obtain first object vertical information pre-coding matrix.Prestore the first vertical information code book, and the first vertical information code book can comprise multiple first vertical information pre-coding matrix.In step S804, according to the second vertical information designator, from the second vertical information code book, obtain the second target vertical information pre-coding matrix.Prestore the second vertical information code book, and the second vertical information code book can comprise multiple second vertical information pre-coding matrix.
In step S805, obtain instantaneous and/or arrowband weighting coefficient matrix according to the second target level information pre-coding matrix and the second target vertical information pre-coding matrix.Such as, can by the second target level information pre-coding matrix and the second target vertical information pre-coding matrix, to obtain instantaneous and/or arrowband weighting coefficient matrix.
Fig. 9 illustrates and/or arrowband weighting coefficient matrix A instantaneous according to the acquisition of the second target level pre-coding matrix and the second target vertical pre-coding matrix.As shown in Figure 9, instantaneous and/or arrowband weighting coefficient matrix A is except element g hg vin addition, non-the elements in a main diagonal " g is also comprised h" and " g v".First object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and instantaneous and/or arrowband weighting coefficient matrix calculate the pre-coding matrix of three-dimensional mimo system, element " g h", " g v" and g hg velement multiplication respectively in pre-coding matrix horizontal in first object pre-coding matrix vertical with first object, causes the pre-coding matrix of three-dimensional mimo system to comprise and is repeated the data item of weighting with vertical direction in the horizontal direction.
Given this, in step S806, instantaneous and/or arrowband weighting coefficient matrix are corrected, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix.Preferably, in step S806, can by described instantaneous/arrowband weighting coefficient matrix in non-the elements in a main diagonal be set to zero, with correct described instantaneous/arrowband weighting coefficient matrix.
Finally, in step S807, by first object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and the pre-coding matrix calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
By the pre-coding matrix generation method of the present embodiment, the pre-coding matrix avoiding three-dimensional mimo system comprises and is repeated the data item of weighting with vertical direction in the horizontal direction, thus improve the quantified precision of the pre-coding matrix of three-dimensional mimo system, decrease error.
Figure 10 shows the exemplary block diagram of transmitter 1000 according to an embodiment of the invention.As shown in Figure 100 0, the transmitter 1000 of the present embodiment comprises the vertical matrix acquiring unit 1050 of the vertical matrix acquiring unit 1040, second of receiving element 1010, first level matrix acquiring unit 1020, second level matrix acquiring unit 1030, first, weighting matrix acquiring unit 1060, weighting matrix correcting unit 1070 and computing unit 1080.The unit of transmitter 1000 can perform each step/function of the pre-coding matrix generation method 800 in above-mentioned Fig. 8 respectively.Therefore, only the critical piece of transmitter 1000 is described below, and eliminates the detail content that above composition graphs 8 described.
Receiving element 1010 can receive from receiver and indicate the first horizontal information designator of first object horizontal information pre-coding matrix, indicates the second horizontal information designator of the second target level information pre-coding matrix, indicates the first vertical information designator of first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix.Particularly, first object horizontal information pre-coding matrix instruction three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) horizontal component information, second target level information pre-coding matrix instruction three dimensional channel on particular moment and/or characteristic frequency (namely, instantaneous and/or arrowband) horizontal component information, first object vertical information pre-coding matrix instruction three dimensional channel in time and/or frequency band is added up (namely, time long and/or broadband) vertical component information, second target vertical information pre-coding matrix instruction three dimensional channel on particular moment and/or characteristic frequency (namely, instantaneous and/or arrowband) vertical component information.
Then, the first level matrix acquiring unit 1020, according to the first horizontal information designator, obtains first object horizontal information pre-coding matrix from the first horizontal information code book.Prestore the first horizontal information code book, and the first horizontal information code book can comprise multiple first horizontal information pre-coding matrix.Similarly, the second level matrix acquiring unit 1030, according to the second horizontal information designator, obtains the second target level information pre-coding matrix from the second horizontal information code book.Prestore the second horizontal information code book, and the second horizontal information code book can comprise multiple second horizontal information pre-coding matrix.First vertical matrix acquiring unit 1040, according to the first vertical information designator, obtains first object vertical information pre-coding matrix from the first vertical information code book.Prestore the first vertical information code book, and the first vertical information code book can comprise multiple first vertical information pre-coding matrix.Second vertical matrix acquiring unit 1050, according to the second vertical information designator, obtains the second target vertical information pre-coding matrix from the second vertical information code book.Prestore the second vertical information code book, and the second vertical information code book can comprise multiple second vertical information pre-coding matrix.
Weighting matrix acquiring unit 1060 obtains instantaneous and/or arrowband weighting coefficient matrix according to the second target level information pre-coding matrix and the second target vertical information pre-coding matrix.Such as, can by the second target level information pre-coding matrix and the second target vertical information pre-coding matrix, to obtain instantaneous and/or arrowband weighting coefficient matrix.Then, weighting matrix correcting unit 1070 corrects instantaneous and/or arrowband weighting coefficient matrix, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix.Preferably, in step S806, can by described instantaneous/arrowband weighting coefficient matrix in non-the elements in a main diagonal be set to zero, with correct described instantaneous/arrowband weighting coefficient matrix.
Finally, computing unit 1080 is by first object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and the pre-coding matrix of three-dimensional mimo system calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
The pre-coding matrix of three-dimensional mimo system can be avoided to comprise by the transmitter of the present embodiment and be repeated the data item of weighting with vertical direction in the horizontal direction, thus improve the quantified precision of the pre-coding matrix of three-dimensional mimo system, decrease error.
Those of ordinary skill in the art can recognize, in conjunction with the unit of each example, module and algorithm steps that embodiment disclosed herein describes, can realize with electronic hardware, computer software or the combination of the two.And computer software can be placed in the computer-readable storage medium of arbitrary form.In order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those skilled in the art can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
It should be appreciated by those skilled in the art that and can be dependent on design requirement and other factors carries out various amendment, combination, incorporating aspects and replacement to the present invention, as long as they are in the scope of appended claims and equivalent thereof.

Claims (20)

1. generate a method for the code word pre-coding matrix being used for three-dimensional multiple-input and multiple-output (MIMO) system, comprising:
Obtain the target level information pre-coding matrix about the horizontal component information of the three dimensional channel between transmitter and described receiver;
Obtain the target vertical information pre-coding matrix about the vertical component information of the three dimensional channel between transmitter and described receiver;
Obtain the target associating pre-coding matrix about the three dimensional channel between transmitter and described receiver; And
The pre-coding matrix of described three-dimensional mimo system is calculated by described target level information pre-coding matrix, described target vertical information pre-coding matrix and described target associating pre-coding matrix.
2. the method for claim 1, wherein
Described target level information pre-coding matrix indicates described three dimensional channel in time and/or the horizontal component information that frequency band is added up;
Described target vertical information pre-coding matrix indicates described three dimensional channel in time and/or the vertical component information that frequency band is added up;
Described target associating pre-coding matrix is the weighting coefficient matrix for described horizontal component information and described vertical component information;
The described pre-coding matrix by the described three-dimensional mimo system of described target level information pre-coding matrix, described target vertical information pre-coding matrix and described target associating pre-coding matrix calculating comprises:
For the channel sequence number of often kind of channel, calculated the pre-coding matrix of this channel sequence number by described target level information pre-coding matrix, described target vertical information pre-coding matrix and described target associating pre-coding matrix; And
When described channel sequence number is greater than for the moment, the target associating pre-coding matrix of multiple channel sequence is mutually orthogonal between two.
3. method as claimed in claim 2, wherein
Described horizontal information pre-coding matrix be by be more than or equal to the first predetermined threshold described three-dimensional mimo system horizontal channel component in time and/or the spatial correlation matrix that frequency band is added up characteristic value characteristic of correspondence vector form; And
Described vertical information pre-coding matrix be by be more than or equal to the second predetermined threshold described three-dimensional mimo system vertical channel component in time and/or the spatial correlation matrix that frequency band is added up characteristic value characteristic of correspondence vector form.
4. method as claimed in claim 2 or claim 3, wherein
Described target level information pre-coding matrix is selected from comprising the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring;
Described target vertical information pre-coding matrix is selected from comprising the vertical information code book of multiple vertical information pre-coding matrix of prestoring;
According to channel sequence number, described target is selected to combine pre-coding matrix from corresponding to this channel sequence number, comprising the associating code book of multiple associating pre-coding matrix of prestoring.
5. method as claimed in claim 4, wherein
Described target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about described three dimensional channel and the phase object associating pre-coding matrix about the phase place of described three dimensional channel obtain;
Described associating code book comprises the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix;
Described according to channel sequence number, select described target to combine pre-coding matrix from corresponding to this channel sequence number, comprising the associating code book of multiple associating pre-coding matrix of prestoring and comprise:
From the described amplitude associating code book prestored, select described amplitude target to combine pre-coding matrix, and
According to channel sequence number, from described phase combining code book that is corresponding to this channel sequence number, that prestore, select described phase object to combine pre-coding matrix, wherein for different channel sequence numbers, prestore different phase combining code books;
When channel sequence number is greater than for the moment, target level information pre-coding matrix, the target vertical information pre-coding matrix of multiple channel sequence are identical with amplitude target associating pre-coding matrix, and the phase object associating pre-coding matrix of all channel sequence is mutually orthogonal between two.
6. method as claimed in claim 4, wherein said method is applied to receiver, and described method also comprises:
Responded by described three dimensional channel, calculate described horizontal channel component information and described vertical channel component information,
Wherein saidly described target level information pre-coding matrix is selected to comprise from comprising the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring:
Retrieve in described horizontal information code book, to obtain with the horizontal information pre-coding matrix of described horizontal channel information matches as described target level information pre-coding matrix;
Describedly described target vertical information pre-coding matrix is selected to comprise from comprising the vertical information code book of multiple vertical information pre-coding matrix of prestoring:
Retrieve in described vertical information code book, to obtain with the vertical information pre-coding matrix of described vertical channel information matches as described target vertical information pre-coding matrix;
The described channel sequence number determined according to receiver, select described target to combine pre-coding matrix from corresponding to this channel sequence number, comprising the associating code book of multiple associating pre-coding matrix of prestoring and comprise:
Respond according to described target level information pre-coding matrix, described target vertical information pre-coding matrix and described three dimensional channel, according to channel sequence number, described target is selected to combine pre-coding matrix from corresponding to this channel sequence number, comprising the associating code book of multiple associating pre-coding matrix of prestoring.
7. method as claimed in claim 6, wherein
Described target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about described three dimensional channel and the phase object associating pre-coding matrix about the phase place of described three dimensional channel obtain;
Described associating code book comprises the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix;
Described according to the response of described target level information pre-coding matrix, described target vertical information pre-coding matrix and described three dimensional channel, select described target to combine pre-coding matrix from comprising the associating code book of multiple associating pre-coding matrix of prestoring and comprise:
By the response of described target level information pre-coding matrix, described target vertical information pre-coding matrix and described three dimensional channel, computing reference matrix;
Retrieve in described amplitude associating code book, combine pre-coding matrix and combine pre-coding matrix to obtain the amplitude of mating with described R-matrix as described target amplitude;
According to the channel sequence number that receiver is determined, for each phase combining pre-coding matrix in the phase combining code book corresponding to this channel sequence number, the pre-coding matrix of the three-dimensional mimo system of candidate calculated by described target level information pre-coding matrix, described target vertical information pre-coding matrix, target amplitude associating pre-coding matrix and this associating pre-coding matrix, and combine pre-coding matrix using with the phase combining pre-coding matrix corresponding to the pre-coding matrix of the three-dimensional mimo system of the candidate of three dimensional channel responses match as described target phase.
8. method as claimed in claim 4, wherein said method is applied to transmitter, and described method also comprises:
Receive from receiver and indicate the first designator of described target level information pre-coding matrix, indicate the second designator of described target vertical information pre-coding matrix and indicate described target to combine the 3rd designator of pre-coding matrix; And
The channel sequence number designator being used to indicate channel sequence number is received from receiver,
Wherein saidly described target level information pre-coding matrix is selected to comprise from comprising the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring:
In described horizontal information code book, obtain the horizontal information pre-coding matrix corresponding with described first designator as described target level information pre-coding matrix;
Describedly described target vertical information pre-coding matrix is selected to comprise from comprising the vertical information code book of multiple vertical information pre-coding matrix of prestoring:
In described vertical information code book, obtain the vertical information pre-coding matrix corresponding with described second designator as described target vertical information pre-coding matrix;
Describedly select described target to combine pre-coding matrix from comprising the associating code book of multiple associating pre-coding matrix of prestoring to comprise:
According to described channel sequence number designator determination channel sequence number, and
In the associating code book corresponding to this channel sequence number, obtain the associating pre-coding matrix corresponding with described 3rd designator as described phase combining pre-coding matrix.
9. method as claimed in claim 8, wherein
Described target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about described three dimensional channel and the phase object associating pre-coding matrix about the phase place of described three dimensional channel obtain;
Described associating code book comprises the amplitude associating code book comprising multiple amplitude associating pre-coding matrix and the phase combining code book comprising multiple phase combining pre-coding matrix;
Described 3rd designator comprises the phase place designator of instruction described phase object associating pre-coding matrix and the amplitude designator of instruction described amplitude target associating pre-coding matrix;
Described in the associating code book corresponding to this channel sequence number, obtain the associating pre-coding matrix corresponding with described 3rd designator and comprise as described phase combining pre-coding matrix:
In described amplitude associating code book, the acquisition amplitude corresponding with described amplitude designator is combined pre-coding matrix and is combined pre-coding matrix as described amplitude target;
According to described channel sequence number designator determination channel sequence number, and
In the phase combining code book corresponding to this channel sequence number, obtain the phase combining pre-coding matrix corresponding with described phase place designator and combine pre-coding matrix as described target phase.
10. method as claimed in claim 2 or claim 3, wherein said method is applied to receiver, and described method also comprises:
To described transmitter send be used to indicate described target level information pre-coding matrix the first designator, indicate the second designator of described target vertical information pre-coding matrix and indicate described target to combine the 3rd designator of pre-coding matrix; And
The channel sequence number designator being used to indicate channel channel sequence number is sent to described transmitter.
11. methods as claimed in claim 10, wherein
Described first designator is sent with very first time interval and the first band separation;
Described second designator is sent with second time interval and the second band separation;
Described 3rd designator is sent with the 3rd time interval and the 3rd band separation;
Described very first time interval and second interval greater than or equal described 3rd time interval; And
Described first band separation and the second band separation are more than or equal to described 3rd band separation.
12. methods as claimed in claim 10, wherein
Described target associating pre-coding matrix is that the amplitude target associating pre-coding matrix by the amplitude about described three dimensional channel and the phase object associating pre-coding matrix about the phase place of described three dimensional channel obtain,
Described 3rd designator comprises the phase place designator of instruction described phase object associating pre-coding matrix and the amplitude designator of instruction described amplitude target associating pre-coding matrix;
Described first designator is sent with very first time interval and the first band separation;
Described second designator is sent with second time interval and the second band separation;
Described phase place designator is sent with the 3rd time interval and the 3rd band separation;
Described amplitude designator is sent with the 4th time interval and the 4th band separation;
Described very first time interval, second time interval and the 4th interval greater than or equal described 3rd time interval; And
Described first band separation, the second band separation and the 4th band separation are more than or equal to described 3rd band separation.
13. 1 kinds of generations are used for the method for the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system, and be applied to transmitter, described method comprises:
The first horizontal information designator of instruction first object horizontal information pre-coding matrix is received from receiver, indicate the second horizontal information designator of the second target level information pre-coding matrix, first vertical information designator of instruction first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix, wherein said first object horizontal information pre-coding matrix indicates described three dimensional channel in time and/or the horizontal component information that frequency band is added up, described second target level information pre-coding matrix indicates the horizontal component information of the instantaneous of described three dimensional channel and/or arrowband, described first object vertical information pre-coding matrix indicates described three dimensional channel in time and/or the vertical component information that frequency band is added up, described second target vertical information pre-coding matrix indicates the vertical component information of the instantaneous of described three dimensional channel and/or arrowband,
According to described first horizontal information designator, from the first horizontal information code book prestored, obtain described first object horizontal information pre-coding matrix;
According to described second horizontal information designator, from the second horizontal information code book prestored, obtain described second target level information pre-coding matrix;
According to described first vertical information designator, from the first vertical information code book prestored, obtain described first object vertical information pre-coding matrix;
According to described second vertical information designator, from the second vertical information code book prestored, obtain described second target vertical information pre-coding matrix;
Instantaneous and/or arrowband weighting coefficient matrix is obtained according to described second target level information pre-coding matrix and described second target vertical information pre-coding matrix;
Described instantaneous and/or arrowband weighting coefficient matrix is corrected, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix;
By described first object horizontal information pre-coding matrix, described first object vertical information pre-coding matrix and the pre-coding matrix calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
14. methods as claimed in claim 13, wherein saidly correct instantaneous/arrowband weighting coefficient matrix, with obtain correction instantaneous/arrowband weighting coefficient matrix comprises:
By described instantaneous/arrowband weighting coefficient matrix in non-the elements in a main diagonal be set to zero, with correct described instantaneous/arrowband weighting coefficient matrix.
15. 1 kinds of generations are used for the device of the pre-coding matrix of three-dimensional multiple-input and multiple-output (MIMO) system, comprising:
First matrix acquiring unit, configuration obtains the target level information pre-coding matrix of the horizontal component information about the three dimensional channel between transmitter and described receiver;
Second matrix acquiring unit, configuration obtains the target vertical information pre-coding matrix of the vertical component information about the three dimensional channel between transmitter and described receiver;
3rd matrix acquiring unit, configuration obtains the target associating pre-coding matrix about the three dimensional channel between transmitter and described receiver; And
Computing unit, configuration carrys out the pre-coding matrix being calculated described three-dimensional mimo system by described target level information pre-coding matrix, described target vertical information pre-coding matrix and described target associating pre-coding matrix.
16. devices as claimed in claim 15, wherein said device is receiver, and described device also comprises:
Information acquisition unit, configuration is responded by described three dimensional channel, calculates described horizontal channel component information and described vertical channel component information,
Wherein said first matrix acquiring unit is retrieved in comprising in the horizontal information code book of multiple horizontal information pre-coding matrix of prestoring, to obtain with the horizontal information pre-coding matrix of described horizontal channel information matches as described target level information pre-coding matrix;
Described second matrix acquiring unit is retrieved in comprising in the vertical information code book of multiple vertical information pre-coding matrix of prestoring, to obtain with the vertical information pre-coding matrix of described vertical channel information matches as described target vertical information pre-coding matrix;
Described 3rd matrix acquiring unit responds according to described target level information pre-coding matrix, described target vertical information pre-coding matrix and described three dimensional channel, according to channel sequence number, described target is selected to combine pre-coding matrix from corresponding to this channel sequence number, comprising the associating code book of multiple associating pre-coding matrix of prestoring.
17. devices as claimed in claim 15, wherein said device is transmitter, and described device also comprises:
Receiving element, configure and indicate the first designator of described target level information pre-coding matrix from receiver reception, indicate the second designator of described target vertical information pre-coding matrix and indicate described target to combine the 3rd designator of pre-coding matrix, and the channel sequence number designator being used to indicate channel sequence number is received from receiver
Wherein said first matrix acquiring unit comprises in the horizontal information code book of multiple horizontal information pre-coding matrix what prestore, obtains the horizontal information pre-coding matrix corresponding with described first designator as described target level information pre-coding matrix;
Described second matrix acquiring unit comprises in the vertical information code book of multiple horizontal information pre-coding matrix what prestore, obtains the vertical information pre-coding matrix corresponding with described second designator as described target vertical information pre-coding matrix;
Described 3rd matrix acquiring unit is according to described channel sequence number designator determination channel sequence number, and corresponding to this channel sequence number prestore comprise in the associating code book of multiple associating pre-coding matrix, obtain the associating pre-coding matrix corresponding with described 3rd designator as described phase combining pre-coding matrix.
18. devices as claimed in claim 15, wherein said device is receiver, and described device also comprises:
Transmitting element, configure to described transmitter send be used to indicate described target level information pre-coding matrix the first designator, indicate the second designator of described target vertical information pre-coding matrix and indicate the 3rd designator of described target associating pre-coding matrix; And
The channel sequence number designator being used to indicate channel sequence number is sent to described transmitter.
19. 1 kinds of transmitters, comprising:
Receiving element, configuration carrys out the first horizontal information designator receiving instruction first object horizontal information pre-coding matrix from receiver, indicate the second horizontal information designator of the second target level information pre-coding matrix, first vertical information designator of instruction first object vertical information pre-coding matrix, indicate the second vertical information designator of the second target vertical information pre-coding matrix, wherein said first object horizontal information pre-coding matrix indicates described three dimensional channel in time and/or the horizontal component information that frequency band is added up, described second target level information pre-coding matrix indicates the horizontal component information of the instantaneous of described three dimensional channel and/or arrowband, described first object vertical information pre-coding matrix indicates described three dimensional channel in time and/or the vertical component information that frequency band is added up, described second target vertical information pre-coding matrix indicates the vertical component information of the instantaneous of described three dimensional channel and/or arrowband,
First level matrix acquiring unit, configuration comes according to described first horizontal information designator, from the first horizontal information code book prestored, obtains described first object horizontal information pre-coding matrix;
Second level matrix acquiring unit, configuration comes according to described second horizontal information designator, from the second horizontal information code book prestored, obtains described second target level information pre-coding matrix;
First vertical matrix acquiring unit, configuration comes according to described first vertical information designator, from the first vertical information code book prestored, obtains described first object vertical information pre-coding matrix;
Second vertical matrix acquiring unit, configuration comes according to described second vertical information designator, from the second vertical information code book prestored, obtains described second target vertical information pre-coding matrix;
Weighting matrix acquiring unit, obtains instantaneous and/or arrowband weighting coefficient matrix according to described second target level information pre-coding matrix and described second target vertical information pre-coding matrix;
Weighting matrix correcting unit, configuration corrects instantaneous and/or arrowband weighting coefficient matrix, to obtain the instantaneous of correction and/or arrowband weighting coefficient matrix;
Computing unit, by first object horizontal information pre-coding matrix, first object vertical information pre-coding matrix and the pre-coding matrix calculating three-dimensional mimo system through the instantaneous of overcorrect and/or arrowband weighting coefficient matrix.
20. methods as claimed in claim 19, wherein
Described correcting unit by described instantaneous/arrowband weighting coefficient matrix in non-the elements in a main diagonal be set to zero, with correct described instantaneous/arrowband weighting coefficient matrix.
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