CN102239711A - Method and device for feeding back channel information and acquiring channel matrix - Google Patents

Method and device for feeding back channel information and acquiring channel matrix Download PDF

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Publication number
CN102239711A
CN102239711A CN2009801473495A CN200980147349A CN102239711A CN 102239711 A CN102239711 A CN 102239711A CN 2009801473495 A CN2009801473495 A CN 2009801473495A CN 200980147349 A CN200980147349 A CN 200980147349A CN 102239711 A CN102239711 A CN 102239711A
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antenna
link
matrix
base station
chain
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CN102239711B (en
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张兴炜
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method and a device for feeding back channel information and acquiring channel matrix are provided. The method for feeding back channel information includes: the channel matrix of the first link is selected to be regarded as a reference matrix, and said first link consists of a first antenna in the base station side and a second antenna in the terminal side and the spatial propagation channel between them; a ratio of the mismatch parameters for representing the relationship between the channel matrix of the second link and the reference matrix is acquired, and said second link includes: at least one link consisting of the first antenna and at least one antenna excepting the second antenna in the terminal side and the corresponding spatial propagation channel, and at least one link consisting of the second antenna and at least one antenna excepting the first antenna in the base station side and the corresponding spatial propagation channel; the ratio of the reference matrix and the mismatch parameter is fed back to the base station. The embodiment of the present invention can save the overhead for feeding back channel information.

Description

Method and device for feeding back channel information and acquiring channel matrix
Feedback channel information and the method and apparatus for obtaining channel matrix
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of feedback channel information and the method and apparatus for obtaining channel matrix.Background technology
Long Term Evolution（Long Term Evolution, LTE) system is improved and enhances 3G aerial access technology, it uses OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology, multiple-input and multiple-output（Multiple Input Multiple Output, MIMO) technology etc. improves systematic function.It is that each user distributes several subcarriers in ofdm system, by the channel information of user feedback on each subcarrier, realizes effective scheduling of resource, improve frequency spectrum resource utilization rate.Base station and terminal are respectively provided with many antennas in mimo system（Mimo system is also included when base station side sets many antennas in a broad sense, and end side sets the descending MISO or up SIMO systems of single antenna）.Assuming that the antenna amount of base station is m, the antenna amount of terminal is n, it is M () that i-th antenna of base station has transmitting mismatch parameter on k-th of subcarrier, and it is M that the jth root antenna of terminal has reception mismatch parameter on k-th of subcarrierRU(J, k, then spatial channel matrix H of the link that the i-th of base station piece antenna and the jth root antenna of terminal are constituted on kth subcarrierDL(j, j, k are
Hdl a, j, k) = Mte a, k) x Hp a, j, k) χ Mru(j, k), wherein, HpA, j, k) it is propagation channel square P cars.There is a kind of direct channels feedback (Direct Channel Feedback in the prior art, DCFB) scheme, it is that the spatial channel matrix calculated according to aforesaid way on obtained each link is fed back into base station, under above-mentioned assumed condition, DCFB schemes need the quantity of the channel matrix fed back individual for w x.The feedback overhead of the mode of channel matrix on reversed each link of feedback is very big.The content of the invention The embodiment of the present invention provides a kind of feedback channel information and the method and apparatus for obtaining channel matrix, to reduce the expense of feedback channel matrixes.
The embodiments of the invention provide a kind of method of feedback channel information, including：
The channel matrix of the first link is chosen as Criterion-matrix, the first antenna of the first chain route base station side and the second antenna of end side and spatial channel composition between the two；
The ratio of the mismatch parameter of relation between channel matrix and Criterion-matrix for the second link of sign is obtained, second link includes：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；The ratio of the Criterion-matrix and mismatch parameter is fed back to base station.
The embodiments of the invention provide a kind of method for obtaining channel matrix, including：
Criterion-matrix and the ratio of mismatch parameter that receiving terminal apparatus is sent, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
The channel matrix of all links is obtained according to the ratio of the Criterion-matrix and mismatch parameter.
The embodiments of the invention provide a kind of device of feedback channel information, including：
Module is chosen, for choosing the channel matrix of the first link as Criterion-matrix, the first antenna of the first chain route base station side and the second antenna of end side and spatial channel composition between the two；Acquisition module, is used for the ratio of the mismatch parameter of relation between the channel matrix and Criterion-matrix that characterize the second link for obtaining, and second link includes：By at least one at least one link that just blunt antenna and corresponding spatial channel are constituted of first antenna and end side in addition to the second antenna, and by least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel constitute to A few link；
Feedback module, for feeding back the ratio of the Criterion-matrix and mismatch parameter to base station.
The embodiments of the invention provide a kind of device for obtaining channel matrix, including：
Receiving module, the Criterion-matrix and the ratio of mismatch parameter sent for receiving terminal apparatus, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
Computing module, the channel matrix for obtaining all links according to the ratio of the Criterion-matrix and mismatch parameter.As shown from the above technical solution, the embodiment of the present invention is by feeding back a Criterion-matrix and characterizing the ratio of the mismatch parameter of relation between the channel matrix of remaining link and the Criterion-matrix, less resource can be taken in feedback channel information, expense is reduced.Brief description of the drawings
Fig. 1 is the schematic flow sheet of first method provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of second method provided in an embodiment of the present invention；
Fig. 3 is the schematic flow sheet of third method provided in an embodiment of the present invention；
Fig. 4 is the schematic flow sheet of fourth method provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of the 5th method provided in an embodiment of the present invention；
Fig. 6 is the schematic flow sheet of the 6th method provided in an embodiment of the present invention；
Fig. 7 is the structural representation of first device provided in an embodiment of the present invention；
Fig. 8 is the structural representation of second device provided in an embodiment of the present invention；
Fig. 9 is the structural representation of system provided in an embodiment of the present invention. Embodiment
Below by drawings and examples, technical scheme is described in further detail.Fig. 1 is the schematic flow sheet of first method provided in an embodiment of the present invention, including：
Step 11:Terminal device chooses the channel matrix of the first link as Criterion-matrix, the second antenna of the first chain route base station side first antenna and end side and spatial channel composition between the two.
Assuming that the antenna amount of base station is m, the antenna amount of terminal is n, then each of the links by base station side an antenna i (first antenna）, end side antenna j (second antenna）And antenna i (first antennas）With antenna j (the second antennas）Between spatial channel composition, m x n bar links can be constituted under above-mentioned assumed condition, in system.Terminal device can arbitrarily choosing one be used as the first link in this m x n bar link.
Step 12:Terminal device obtains the ratio of the mismatch parameter of relation between channel matrix and Criterion-matrix for the second link of sign, and second link includes：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel, for example, second link includes each link being made up of each antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel and each link being made up of each antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
Step 13:Terminal device feeds back the ratio of the Criterion-matrix and mismatch parameter to base station.
The present embodiment can take less resource feedback channel information by feeding back a Criterion-matrix and characterizing the ratio of the mismatch parameter of relation between the channel matrix of remaining link and the Criterion-matrix, reduce expense.The terminal device can obtain the mismatch parameter of the channel matrix of the second link and mismatch parameter with Criterion-matrix, by the way that 2 mismatch parameters are compared, and obtain characterizing the ratio of the mismatch parameter of relation between the channel matrix and Criterion-matrix of the second link.The mismatch parameter how terminal device obtains the channel matrix of each link is prior art, is not repeated herein. Fig. 2 is the schematic flow sheet of second method provided in an embodiment of the present invention, including：Step 21:Criterion-matrix and the ratio of mismatch parameter that base station receiving terminal apparatus is sent, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
Step 22:Base station obtains the channel matrix of all links according to the ratio of the Criterion-matrix and mismatch parameter.
The present embodiment is according to Criterion-matrix and characterizes the ratio of the mismatch parameter of relation between the channel matrix of remaining link and Criterion-matrix, can calculate the channel matrix for obtaining each link, can take fewer resource and obtain the channel matrix of each link.
Base station and terminal device are respectively with the evolution base station in LTE in following embodiments（Evolution NodeB, eNB) and user equipment（User Equipment, UE) exemplified by, it is to be understood that following embodiments can also be applied in other systems.
It is simple in order to state, represent that the transmitting that eNB i-th antenna and UE jth root antenna are constituted is received with chain (i, j) in following each embodiment（Tx/Rx) link, wherein, i=l ..., m, j=l ... n, m, n are respectively the antenna number set in the antenna number and UE set on eNB, the antenna that eNB sides are set uses eNB antennas 1 respectively, eNB antennas m represents that the antenna that UE sides are set uses UE antennas 1 respectively, and UE antennas n is represented.
Channel matrixes of the link chain (i, j) on some subcarrier is represented with H (i, j) in following each embodiment, H (i, j) calculation formula is： H ( , j、 = ΜΤΕ ή χ H p i, j、x M RUU、
Wherein, Mre(0 is transmitting antenna mismatch parameter of eNB i-th antenna on the subcarrier, MRFor UE reception antenna mismatch parameter of the jth root antenna on the subcarrier, Hp(, ') and it is propagation channel matrixes of the link chain (i, j) on the subcarrier. Following examples are based on following theorem：When the distance between two antennas of composition antenna array very little（For example, less than the half wavelength of current sub-carrier）When, equivalent to one antenna of transmitting or reception produced due to the mutual coupling effect between antenna, two antennas produces transmitting or reception.Therefore, it is considered that the propagation channel approximate matrix between two antennas and same transmitting of the other end or reception antenna, for example, eNB the i-th l roots and the i-th 2 antennas apart from very little, then the i-th l roots antenna and the i-th 2 antennas are equal with the propagation channel approximate matrix for the link that UE jth O roots antenna is constituted respectively, i.e. Hp( l, O) « Hp( 2, O).Similarly, if UE 2 antennas of jth l roots and jth apart from very little, the propagation channel square P car approximately equals for the link that 2 antennas of jth l roots antenna and jth are constituted with eNB the i-th O roots antenna respectively, i.e. Hp ( 0, jl) - Hp ( 0, jl)。
Each specific embodiment is described separately below：
Fig. 3 is the schematic flow sheet of third method provided in an embodiment of the present invention, the present embodiment is with link chain (l, 1) it is the first link, and exemplified by ratio of the ratio of mismatch parameter for the mismatch parameter of the ratio and the UE antennas n of UE antennas 2 and UE antennas 1 of the eNB antennas m of eNB antennas 2 and the mismatch parameter of eNB antennas 1.Referring to Fig. 3, the present embodiment includes：
Step 301:UE regard the channel matrix of chain (l, 1) link as Criterion-matrix.It regard matrix H (l, l) as Criterion-matrix.
Step 302:UE calculates the ratio for the mismatch parameter for obtaining the channel matrix and relation between Criterion-matrix for characterizing the second link, that is, calculates the ratio for obtaining the eNB antennas m of eNB antennas 2 respectively with the ratio and the UE antennas n of UE antennas 2 of the mismatch parameter of eNB antennas 1 respectively with the mismatch parameter of UE antennas 1.
Second link includes the link being made up of respectively with the UE antenna in addition to the 1st antenna eNB the 1st antenna and the link being made up of respectively with the eNB antenna in addition to the 1st antenna UE the 1st antenna, that is the second link includes chain (1, j) (j=2, ..., η) with chain (i, 1) (i=2 .., m).
2 antennas are provided with assuming that being provided with eNB on 4 antennas, UE.
According to above-mentioned channel matrix calculation formula The channel matrix that each link can be obtained can be as shown in table 1：
Table 1 The H of 2 eNB antennas of channel matrix UE 1 UE antennas of antenna 1) ^MTE{\)Hp{\,\)MRU(\) H(\,2) = MTE(\)Hp(\,2)MRU(2) H of eNB antennas 2 2) ^MTE{2)Hp{2,\)MRU{\) H(2,2) = MTE(2)Hp(2,2)MRU(2) H { 2 of eNB antennas 3>,\)^MTE{2>)Hp{2>,\)MRU{\) H(3,2) = MTE(3)Hp(3,2)MRU(2) H of eNB antennas 4) ^MTE{ )Hp{ ,\)MRU{\) H(4,2) = MTE(4)Hp(4,2)MRU(2) assume eNB and UE antenna array antenna distance between any two it is blunt it is small (be, for example, less than the half wavelength of current sub-carrier）, according to above-mentioned theorem, then the two of side piece antenna is equal with the propagation channel approximate matrix for the link that the same antenna of opposite side is constituted respectively.
That is Hp (1, j) « Hp (2, j)^-^Hp(m, j) , Hp « Hp (i,2) ---H, (i, n)。
In the case where above-mentioned propagation channel approximate matrix is equal, then it can obtain there is Relationship of Coefficients, i.e. the ratio between antenna mismatch parameter between channel matrix.
The problem of resource overhead caused in order to avoid the channel matrix of each link of existing feedback is larger, the UE of the present embodiment can recover each channel matrix with feedback reference matrix and the ratio of mismatch parameter, eNB according to the ratio and Criterion-matrix of mismatch parameter.
Step 303:The ratio of Criterion-matrix and each mismatch parameter obtained above is fed back to eNB by UE.Specifically, for link chain (l, l) channel matrix H (l, l) of the link, link chain (lj) (j=2 are still fed back, ..., n) and chain (i, l) (i=2 ..., m) ratio of the mismatch parameter of corresponding link is fed back, and remaining link can not feedback-related information.The feedback information of i.e. each Link Feedback can be with shown in oral thermometer 2：
Table 2
The UE antennas 2 of feedback information UE antennas 1
The H (l, l) of eNB antennas 1=r£(1) ^ (1,1) ^ ^ (1) eNB antennas 21
ENB antennas 31
(）
ENB antennas 41
MTE(1) aforesaid way is generalized to eNB antenna numbers for m, UE antenna numbers are n scene, then each link of interface needs the feedback information fed back can be as shown in table 3 in ^：
Table 3
Step 304:ENB obtains the channel matrix of each link according to the feedback information.
ENB is received after feedback information, it is necessary to be calculated as below：
It can be directly obtained for link chain (l, 1), the Criterion-matrix H (l, l) as fed back；Channel matrix H (U) for link chain (i, 1) can be multiplied with Criterion-matrix and obtain according to link chain (i, the 1) ratios fed back, and calculation formula is：
H(U) = β{ίλ) χ H(l,l) , i=2, ... ,m;
Channel matrix H (l) for link chain (l, j) can be multiplied with Criterion-matrix and obtain according to link chain (l, the j) ratios fed back, and calculation formula is：
It can be multiplied and obtained with Criterion-matrix according to link chain (i, 1) and link chain (l, j) ratio fed back for link chain (i, j) channel matrix, calculation formula is： Η (, /)=β () χ β (1, /) χ Η (1), i=2 ..., m, j=2 ..., n.
The computational methods that eNB recovers the channel matrix of each link according to feedback information can be as shown in table 4:
Table 4
The present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, the present embodiment only needs one channel matrix of feedback and m+n-2 numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save；Also, the scene of the present embodiment Geng Shi Yong Yu Round array antennas.
In the third embodiment, all antennas are all with link chain (l, 1) channel matrix as benchmark, and feedback characterizes the ratio of the mismatch parameter of relation between corresponding channel matrix and the Criterion-matrix.The condition apart from very little of the element of this Dui Yu Round array antenna or antenna array between any two can be met very well.But for linear array antenna, only adjacent antenna disclosure satisfy that spacing is blunt small, such as antenna 1 and antenna 2 are smaller than half wavelength, and the spacing that antenna 2 and antenna 3 are smaller than between half wavelength, but antenna 1 and antenna 3 is perhaps just unsatisfactory for condition.At this moment need to obtain to characterize the ratio of the mismatch parameter of relation between the channel matrix of adjacent link, rather than all using the ratio with the mismatch parameter of Criterion-matrix relation.
Fig. 4 is the schematic flow sheet of fourth method provided in an embodiment of the present invention, the present embodiment is using the first link as link chain (l, 1), and exemplified by ratio of the ratio for the mismatch parameter between the ratio of mismatch parameter between eNB sides adjacent antenna on the basis of eNB antennas 1 and the UE sides adjacent antenna on the basis of UE antennas 1 of mismatch parameter.Referring to Fig. 4, the present embodiment includes：
Step 401:UE regard the channel matrix of chain (l, 1) link as Criterion-matrix.It regard matrix H (l, l) as Criterion-matrix. Step 402:UE calculates the ratio of the mismatch parameter between the adjacent antenna obtained on the basis of the antenna in the first link, that is, calculates the ratio of the mismatch parameter between the ratio of mismatch parameter between the eNB sides adjacent antenna obtained on the basis of eNB antennas 1 and the UE sides adjacent antenna on the basis of UE antennas 1.
Second link includes the link being made up of respectively with the UE antenna in addition to the 1st antenna eNB the 1st antenna and the link being made up of respectively with the eNB antenna in addition to the 1st antenna UE the 1st antenna, that is the second link includes chain (1, j) (j=2, ..., η) with chain (i, 1) (i=2 .., m).
Step 403:The ratio of Criterion-matrix (H (l, l)) and above-mentioned each mismatch parameter is fed back to eNB by UE.
Specifically, for link chain (l, l) channel matrix H (l, l) of the link, link chain (lj) (j=2 are still fed back, ..., n) and chain (i, l) (i=2 ..., m) ratio of corresponding link and the mismatch parameter of adjacent link is fed back, and remaining link can not feedback-related information.The feedback information of i.e. each Link Feedback can be as shown in table 5：
Table 5
Step 404:ENB obtains the channel matrix of each link according to the feedback information. It can be directly obtained for link chain (l, 1) channel matrix, the Criterion-matrix ^ (1,1) as fed back；
For link chain (i, 1) channel matrix can calculate adjacent link chain (i-l, 1) channel matrix after obtain.
For link chain (l, j) channel matrix can calculate adjacent link chain (l, j-1) channel matrix after obtain.
Can have following several for link chain (i, j) channel matrix computational methods：
Method one：Calculate successively link chain (2, l) arrive link chain (i, l) channel matrix, then calculate successively link chain (i, 2) arrive link chain (i, j) channel matrix；
Method two：Calculate successively link chain (l, 2) arrive link chain (l, j) channel matrix, then calculate successively link chain (2, j) arrive link chain (i, j) channel matrix；
Method three：Channel matrix is respectively obtained according to method one and method two, afterwards, obtained after making the processing such as geometric average or arithmetic average.
The computational methods that eNB recovers the channel matrix of each link according to feedback information can be as shown in table 6：Table 6
Above-mentioned eNB is to calculate channel matrix successively, the channel matrix of adjacent link is calculated further according to the channel matrix calculated successively, it is to be understood that can also be directly according to the value of feedback and Criterion-matrix of each link The channel matrix of the link is directly calculated, i.e.,：
The calculation formula of link chain (i, 1) channel matrix is：
H(U) = β{ίλ) χ β(ί - 1,1) χ · · · χ β(2,ϊ) χ H(l,l) , i=2, · .. ,m;
The calculation formula of link chain (l, j) channel matrix is：
H(l, j) = β(\, j) χ β(\, 7 - 1) χ · · · χ β(\,2) χ H(l,l) , j=2, ... ,η;
The calculation formula of link chain (i, j) channel matrix is：
H(i, j) = χ H(l,l) , i=2,...,m, j=2,...,n。
The method for calculating channel matrix successively above can avoid repetitive operation, reduce operand, this method that chain channel matrix is directly calculated according to the value of feedback and Criterion-matrix of each link has the raising for avoiding effect to realize accurately well for error propagation, it can be the combination of both approaches in practical operation, be traded off between operand and precision.
The present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, the present embodiment only needs one channel matrix of feedback and m+n-2 numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save；And the present embodiment is more suitable for the scene of linear array antenna.
In third and fourth embodiment, benchmark is all used as with link chain (l, 1) channel matrix, it is to be understood that the channel matrix of any link can be regard as Criterion-matrix.In order to better profit from channel relevancy, Criterion-matrix can be taken as the channel matrix of the link of intermediate antenna composition.
Fig. 5 is the schematic flow sheet of the 5th method provided in an embodiment of the present invention, and unlike 3rd embodiment, the present embodiment using link chain () channel matrix are used as Criterion-matrix.Referring to Fig. 5,
The present embodiment includes：
) channel matrix of link is used as Criterion-matrix.I.e. by square, L* " represents to round downwards, that is, is taken as being less than or equal to * most Big integer.
Step 502:UE calculate obtain each antenna between the channel matrix and Criterion-matrix that characterize the second link outside relation with Outside each antenna
The
The link of antenna composition and the link being made up of respectively with eNB except antenna UE the antenna, i.e. the second+l ..., n) and chain (i.) (i=l ...,
Step 503:The ratio of Criterion-matrix and each mismatch parameter obtained above is fed back to eNB by UEtSpecific link chain (
+ l ..., m) ratio of the mismatch parameter of feedback respective links, and remaining link can not feedback-related information.The feedback information of i.e. each Link Feedback can be as shown in table 7:
Table 7
The n of feedback information UE antennas 1 '
UE antennas ' UE antenna n eNB antennas 11111
β(1
Step 504:ENB obtains the channel matrix of each link according to the feedback information.
ENB is received after feedback information, it is necessary to be calculated as below：
For link chain (；-) can directly obtain, the Criterion-matrix H that as feeds back (
For link chain (i:-) channel matrix can be according to link chain (i:：) ratio of feedback is multiplied with Criterion-matrix and obtains, calculation formula is：
H(i, ) x H( +l,...,m;
For link chain (, channel matrix j) can according to link chain (, the j) ratio of feedback
With the mutually multiplied ^ of Criterion-matrix
+l,...,n;
Can be according to link chain (i for link chain (i, j) channel matrix:；) and link Chain (, j) ratio and Criterion-matrix of feedback are mutually multiplied
+l,...,m 2 w 2 +l,...,n。
The computational methods that eNB recovers the channel matrix of each link according to feedback information can be as shown in table 8:
Table 8
The present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, the present embodiment only needs one channel matrix of feedback and m+n-2 numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save；Also, the present embodiment is used as benchmark, Ke Yigeng using middle bay Utilize channel relevancy well.
Fig. 6 is the schematic flow sheet of the 6th method provided in an embodiment of the present invention, and unlike fourth embodiment, the present embodiment using link chain () channel matrix are used as Criterion-matrix.Referring to Fig. 6,
The present embodiment includes：
Step 601:UE regard the channel matrix of chain () link as Criterion-matrix.I.e. by square Battle array) it is used as Criterion-matrix.
602:UE calculates the ratio for obtaining the mismatch parameter between adjacent antenna on the basis of the antenna in the first link, that is, calculates between the eNB sides adjacent antenna obtained on the basis of eNB antennas The ratio of mismatch parameter between the ratio of mismatch parameter and UE sides adjacent antenna on the basis of UE antennas.
Second link includes the antenna by eNB respectively with UE except the | in addition to 2 antennas of W The antenna of antenna composition is constituted and chain (the specific link chain of i. steps 60 (
+ l ..., the ratio beta of the mismatch parameter of corresponding link m) is fed back, and remaining link can not be anti- Present relevant information.The feedback information of i.e. each Link Feedback can be as shown in table 9:
Table 9
Step 604:ENB obtains the channel matrix of each link according to the feedback information.
Winter
For link chain (；) can directly obtain, the Criterion-matrix H () as fed back
For link chain (i:) channel matrix can calculate successively after the channel matrix of adjacent link
For link chain (, channel matrix j) can be calculated after the channel matrix of adjacent link successively
Can have following several for link chain (i, j) channel matrix computational methods（Assuming that i>
Method one：Link chain () to link chain (i is calculated successively:：) channel square Battle array, then the channel matrix that link chain (+1) arrives link chain (i, j) is calculated successively;Method two：Calculate successively link chain (+1) to link chain (, channel matrix j):
Calculating link chain successively again, (+l j) arrives link chain (i, j) channel matrix;
Method three：Channel matrix is respectively obtained according to method one and method two, afterwards, obtained after making geometric average or the flat equalization process of-art.
Work as i<, or j<When, it would however also be possible to employ the computational methods that the similar calculating successively of three kinds of above-mentioned methods obtains the channel matrix that eNB recovers each link according to feedback information can be as shown in table 10:
Table 10
Above-mentioned eNB is to calculate channel matrix successively, the channel matrix of adjacent link is calculated further according to the channel matrix calculated successively, it is to be understood that directly can also directly calculate the channel matrix of the link according to the value of feedback and Criterion-matrix of each link, i.e.,：
The calculation formula of link chain (i.) channel matrix is：
), i=+ l ..., m; H(i, )χ-χβ( )XH (), i=l ..., -1:The calculation formula of link chain (j) channel matrix is：
When+l ..,
= A Ι)χβ( ]-ί)χ-χβ(
As j=l ..., -1,
The calculation formula of link chain (i, j) channel matrix is：
)
The present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, the present embodiment only needs one channel matrix of feedback and m+n-2 numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save；The present embodiment can preferably meet channel relevancy, also, the amount of calculation that the present embodiment can also be such that base station side is done when recovering channel matrix is minimum.
3rd-six embodiment is to exist by UE between many antennas and many antennas exemplified by correlation, when UE has an antenna or when there are many antennas and uncorrelated many antennas, i.e. the distance between antennas two-by-two of many antennas of UE is all insufficient to small.Every antenna of correspondence is then needed to perform above-mentioned step.Specifically, the present invention can also include following examples：
7th embodiment：Corresponding to 3rd embodiment, with UE first antenna（UE antennas 1) exemplified by, it is necessary to which feedack can be as shown in table 11：
Table 11
Feedback information UE antennas 1
The H (l, l) of eNB antennas 1=r£ (1)^ (1,1)^ ^ (1)
ENB antennas 2
MTE(1) eNB antennas m
Upon reception of the feedback information, computational methods can be as shown in table 12 by eNB：
Table 12
Computational methods UE antennas 1
ENB antennas 1 directly obtain H (l, l) ENB antennas 2 ENB antennas m
UE remaining antenna similarly performs above-mentioned steps, and the present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, current embodiment require that n channel matrix of feedback with（M-l) x numerical value, compared with DCFB needs x matrix of feedback, can reduce the overhead bit that feedback takes, greatly save air interface resource.
8th embodiment：Corresponding to fourth embodiment, with UE first antenna（UE antennas 1) exemplified by, it is necessary to which feedack can be as shown in table 13：
Table 13
Feedback information UE antennas 1
The H (l, l) of eNB antennas 1=r£ (1)^(1,1)^ ^(1)
ENB antennas 2
MTE(1))
ENB antennas 3
,1)= Μτε(3)
ΜΤΕ(2)
ENB antennas m=N(m'1 = M»
H(m-\,\) TE(w-l) upon reception of the feedback information, computational methods can be as shown in table 14 by eNB：
Table 14
Computational methods UE antennas 1
ENB antennas 1 are directly obtained/(1,1)
The H (l, l) of eNB antennas 2 is multiplied by A2, l)
ENB antennas 3 calculate H (2, l) after be multiplied by (3,1) ENB antennas m is multiplied by β η after calculating H (w _ 1,1))
UE remaining antenna similarly performs above-mentioned steps, the present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, current embodiment require that n channel matrix of feedback and 0-1) χ numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save.
9th embodiment：Corresponding to the 5th embodiment, with UE first antenna（UE antennas 1) exemplified by, it is necessary to which feedack can be as shown in Table 15：
Table 15
ENB antennas 1
- .. eNB antennas are directly obtained, and 1)
L2」
..-eNB antennas m m
— ,1)
UE remaining antenna similarly performs above-mentioned steps, the present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect II fruit same with DCFB, but compared with DCFB, current embodiment require that n channel matrix of feedback and 0-1) χ numerical value, need to feed back x matrix phase with DCFB
X
Than that can reduce the overhead bit that feedback takes, greatly save air interface resource.
Tenth embodiment：Corresponding to sixth embodiment, with UE first antenna（UE antennas 1) exemplified by, it is necessary to which feedack can be as shown in table 17：
Table 17
--eNB antennas m,
MTE (m - 1)
ENB upon reception of the feedback information,
Table 18
UE remaining antenna similarly performs above-mentioned steps, the present embodiment can recover all channel matrixes by above-mentioned calculating, reach the effect same with DCFB, but compared with DCFB, current embodiment require that n channel matrix of feedback and 0- 1) χ numerical value, compared with DCFB needs x matrix of feedback, the overhead bit that feedback takes can be reduced, air interface resource is greatlyd save.
Fig. 7 is the structural representation of first device provided in an embodiment of the present invention, including chooses module 71, acquisition module 72 and feedback module 73.Choose module 71 and be used as Criterion-matrix for choosing the channel matrix of the first link；Acquisition module 72 is used for the ratio for obtaining the mismatch parameter of relation between the channel matrix and Criterion-matrix that characterize the second link, and second link includes：Second antenna is removed by first antenna and end side Outside at least one antenna and corresponding spatial channel composition at least one link, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；Feedback module 73 is used for the ratio for feeding back the Criterion-matrix and mismatch parameter to base station.
Wherein, the second antenna composition of the first antenna of the first chain route base station side and end side, the acquisition module includes first module or second unit；The first module is used to calculating the ratio of the mismatch parameter of the ratio of at least one antenna in addition to first antenna for obtaining base station side and the mismatch parameter of first antenna and at least one antenna in addition to the second antenna of end side and the second antenna；The second unit is used on the basis of the first antenna of base station side the ratio for calculating the ratio of the mismatch parameter between the adjacent antenna for obtaining base station side and the mismatch parameter between the adjacent antenna for obtaining end side being calculated on the basis of the second antenna of end side.
The feedback module can include third unit, Unit the 4th；The third unit is used to the Criterion-matrix is fed back into base station by first link；Unit the 4th is used to the ratio of the corresponding mismatch parameter of second link is fed back into base station by second link.
The device can be arranged on terminal equipment side, and the method for the specific method for determining Criterion-matrix and ratio calculated may refer to above-mentioned embodiment of the method.
The present embodiment can take less resource feedback channel information by feeding back a Criterion-matrix and characterizing the ratio of the mismatch parameter of relation between the channel matrix of remaining link and the Criterion-matrix, reduce expense.
Fig. 8 is the structural representation of second device provided in an embodiment of the present invention, including receiving module 81 and computing module 82.Receiving module 81 is used for the Criterion-matrix of receiving terminal apparatus transmission and the ratio of mismatch parameter, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and by the second antenna and base station side in addition to first antenna extremely At least one link of a few antenna and corresponding spatial channel composition；Computing module 82 is used for the channel matrix that all links are obtained according to the ratio of the Criterion-matrix and mismatch parameter.
The device can be arranged on base station side, specifically may refer to above-mentioned embodiment of the method according to the method for Criterion-matrix and the channel matrix of each link of ratio calculation.
The present embodiment is according to Criterion-matrix and characterizes the ratio of the mismatch parameter of relation between the channel matrix of remaining link and Criterion-matrix, can calculate the channel matrix for obtaining each link, can take fewer resource and obtain the channel matrix of each link.
Fig. 9 is the structural representation of system provided in an embodiment of the present invention, including terminal device 91 and base station 92.The channel matrix that terminal device 91 is used to choose the first link is used as Criterion-matrix；Obtain for characterize each second link channel matrix and Criterion-matrix between relation mismatch parameter ratio, second link includes the link that is made up of respectively with the antenna in addition to the antenna in the first link in opposite side of eating dishes without rice or wine the antenna in the first link；And feed back the ratio of the Criterion-matrix and mismatch parameter；Base station 92 is used to receiving the ratio of the Criterion-matrix and mismatch parameter, and according to the channel matrix of the corresponding each link of the ratio acquisition of the Criterion-matrix and mismatch parameter.
Wherein, the terminal device in the present embodiment may refer to the device shown in Fig. 7, and base station may refer to the device shown in Fig. 8.
The present embodiment can take less resource feedback channel information by feeding back a Criterion-matrix and characterizing the ratio of the mismatch parameter of relation between the channel matrix of remaining link and the Criterion-matrix, reduce expense；According to Criterion-matrix and the ratio of the mismatch parameter of relation between the channel matrix of remaining link and Criterion-matrix is characterized, the channel matrix for obtaining each link can be calculated, the effect same with DCFB can be realized but fewer resource is taken.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, and foregoing program can be stored in computer read/write memory medium, and the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than it is entered Row limitation, although the present invention is described in detail with reference to preferred embodiments, it will be understood by those within the art that：It can still modify or equivalent substitution to technical scheme, and these modifications or equivalent substitution can not also make the spirit and scope of amended technical scheme disengaging technical solution of the present invention.For example, previous embodiments methods described can be combined with prior art and realize the feedback of channel information, that is, a part of link in mimo system can be using the feedback channel information described in the embodiment of the present invention and the method for obtaining channel matrix, and other links then realize the feedback of channel information and the acquisition of channel matrix using prior art.In actual applications, for a link, the ratio for directly feeding back the mismatch parameter of relation between its channel matrix or feedback its channel matrix of sign and Criterion-matrix is needed all to be manually set, above-described embodiment is not considered as limitation of the present invention.

Claims (12)

  1. Claim
    1st, a kind of method of feedback channel information, it is characterised in that including：
    The channel matrix of the first link is chosen as Criterion-matrix, the first antenna of the first chain route base station side and the second antenna of end side and spatial channel composition between the two；
    The ratio of the mismatch parameter of relation between channel matrix and Criterion-matrix for the second link of sign is obtained, second link includes：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；The ratio of the Criterion-matrix and mismatch parameter is fed back to base station.
    2nd, according to the method described in claim 1, it is characterised in that choosing the first link includes：When the antenna of base station side and the antenna of end side are linear array antenna, the bay in base station side centre position is chosen as first antenna, the bay for choosing end side centre position is used as the second antenna.
    3rd, according to the method described in claim 1, it is characterised in that the ratio for obtaining the mismatch parameter of relation between channel matrix and Criterion-matrix for the second link of sign includes：
    Calculate the ratio of the mismatch parameter of the ratio of at least one antenna in addition to first antenna for obtaining base station side and the mismatch parameter of first antenna and at least one antenna in addition to the second antenna of end side and the second antenna；
    Or,
    The ratio of the mismatch parameter between the adjacent antenna for obtaining base station side is calculated on the basis of the first antenna of base station side and the ratio of the mismatch parameter between the adjacent antenna for obtaining end side is calculated on the basis of the second antenna of end side.
    4th, according to the method described in claim 1, it is characterised in that the ratio of the feedback Criterion-matrix and mismatch parameter includes to base station：
    The Criterion-matrix is fed back to by base station by first link；
    The ratio of the corresponding mismatch parameter of second link is fed back to by base station by second link.
    5th, according to any described method of claim 1-4, it is characterised in that when end side at least The method of channel information.
    6th, a kind of method for obtaining channel matrix, it is characterised in that including：
    Criterion-matrix and the ratio of mismatch parameter that receiving terminal apparatus is sent, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
    The channel matrix of all links is obtained according to the ratio of the Criterion-matrix and mismatch parameter.
    7th, method according to claim 6, it is characterised in that
    First link is chain (i0, j0), and chain (i0, j0) represents the link being made up of the antenna i0 of base station side and the antenna jO of end side；
    Second link includes link chain (i,) and link chain (i0 j0, j), wherein, chain (i, j0 the link of the antenna i of base station side and the antenna jO compositions of end side) is represented, (i0 j) represents the link of the antenna i0 of base station side and the antenna j compositions of end side to chain；
    The ratio of the mismatch parameter be β (i) and (0,）；
    Wherein ,=l ..., w, and ≠ 0, j=...,n, Kj ≠ jO, m is the number of the antenna of base station side, and n is the number of the antenna of end side, and i0 is any number in l m, and jO is any number in l n；
    The channel matrix for obtaining all links according to the ratio of the Criterion-matrix and mismatch parameter includes：
    Link chain (i0, j0) channel matrix is the Criterion-matrix H (i0, j0);
    Work as G,O) = Ji^_, β ο, j=MWhen ^U), wherein, M () is the day of base station side
    MTE(iO) MRU(jO) line i mismatch parameter, M (0) is the antenna i0 of base station side mismatch parameter, and Μ () is end side Antenna j mismatch parameter, M^GO) for end side antenna jO mismatch parameter,
    The calculation formula of link chain (i, j0) channel matrix H (i, j0) is：
    (i0, (i0, calculation formula j) is channel matrix H j) link chain：
    The calculation formula of link chain (i, j) channel matrix H (i, j) is：
    H(i,j)^fi(i,jO)xfi(iO,j)xH(iO,jO)。
    8th, method according to claim 6, it is characterised in that
    First link is chain (i0, j0), and chain (i0, j0) represents the link being made up of the antenna i0 of base station side and the antenna jO of end side；
    Second link includes linkCHain (i,) and link chain (i0 j0, j), wherein, chain (i, j0 the link of the antenna i of base station side and the antenna jO compositions of end side) is represented, (i0 j) represents the link of the antenna i0 of base station side and the antenna j compositions of end side to chain；
    The ratio of the mismatch parameter be β (i) and (0,）；
    Wherein ,=l ..., m, and ≠ 0, j=...,n, j ≠ jO, m is the number of the antenna of base station side, and n is the number of the antenna of end side, and i0 is any number in l m, and jO is any number in l n；
    The channel matrix for obtaining all links according to the ratio of the Criterion-matrix and mismatch parameter includes：
    Link chain (i0, j0) channel matrix is the Criterion-matrix H (i0, j0);
    Work as ο) be mismatch parameter between base station side adjacent antenna ratio and β α ο, when Α is the ratio of the mismatch parameter between the adjacent antenna of end side,
    Link chain (i, j0) channel matrix H (i, j0) is obtained according to following calculation formula from H (i0, j0) recursion：
    H (i, j0)=β (, Μ χ H (i', j0), wherein, H (, jQ ") for the channel matrix of the base station side link adjacent and nearer with link chain (i0, j0) with link chain (i, j0)；
    Link chain (i0, j) channel matrix H (i0, j) according to following calculation formula from H (i0, j0) recursion Obtain：
    H (i0, j)=fi (iO, j) x H (iO, f), wherein, H (iO, f, for end side and link chain (i0, the channel matrix of j) adjacent and nearer with link chain (i0, j0) link；
    Link chain (i, j) channel matrix H (i, j) is obtained by any of the following two kinds method, or by the following two kinds method respectively obtain after be averaging processing again after obtain：
    Method one：Calculate link chain (i0, j0 link chain (i) are arrived, j0 channel matrix) is calculated and link chain (i again, j0 it is) adjacent and with link chain (i0, j0) channel matrix of the link farther out to link chain (i, j)；Method two：Calculate linkCHain (i0, j0) to link chain (i0, channel matrix j) calculate again with link chain (i0, it is j) adjacent and with link chain (i0, j0) channel matrix of the link farther out to link chain (i, j).
    9th, a kind of device of feedback channel information, it is characterised in that including：
    Module is chosen, for choosing the channel matrix of the first link as Criterion-matrix, the first antenna of the first chain route base station side and the second antenna of end side and spatial channel composition between the two；Acquisition module, is used for the ratio of the mismatch parameter of relation between the channel matrix and Criterion-matrix that characterize the second link for obtaining, and second link includes：By at least one at least one link that just blunt antenna and corresponding spatial channel are constituted of first antenna and end side in addition to the second antenna, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
    Feedback module, for feeding back the ratio of the Criterion-matrix and mismatch parameter to base station.
    10th, device according to claim 9, it is characterised in that the acquisition module includes first module or second unit；
    The first module is used to calculating the ratio of the mismatch parameter of the ratio of at least one antenna in addition to first antenna for obtaining base station side and the mismatch parameter of first antenna and at least one antenna in addition to the second antenna of end side and the second antenna；
    The second unit is used on the basis of the first antenna of base station side the ratio for calculating the ratio of the mismatch parameter between the adjacent antenna for obtaining base station side and the mismatch parameter between the adjacent antenna for obtaining end side being calculated on the basis of the second antenna of end side. 11st, device according to claim 9, it is characterised in that the feedback module includes third unit, Unit the 4th；
    The third unit is used to the Criterion-matrix is fed back into base station by first link；Unit the 4th is used to the ratio of the corresponding mismatch parameter of second link is fed back into base station by second link.
    12nd, a kind of device for obtaining channel matrix, it is characterised in that including：
    Receiving module, the Criterion-matrix and the ratio of mismatch parameter sent for receiving terminal apparatus, the Criterion-matrix is the channel matrix for the first link chosen, the ratio of the mismatch parameter is used to characterize the relation between the channel matrix and Criterion-matrix of the second link, second antenna of first chain route base station side first antenna and end side and spatial channel composition between the two, second link include：At least one link being made up of at least one antenna in addition to the second antenna of first antenna and end side and corresponding spatial channel, and at least one link being made up of at least one antenna in addition to first antenna of the second antenna and base station side and corresponding spatial channel；
    Computing module, the channel matrix for obtaining all links according to the ratio of the Criterion-matrix and mismatch parameter.
    13rd, device according to claim 12, it is characterised in that
    First link is chain (i0, j0), and chain (i0, j0) represents the link being made up of the antenna i0 of base station side and the antenna jO of end side；
    Second link includes linkCHain (i,) and link chain (i0 j0, j), wherein, chain (i, j0 the link of the antenna i of base station side and the antenna jO compositions of end side) is represented, (i0 j) represents the link of the antenna i0 of base station side and the antenna j compositions of end side to chain；
    The ratio of the mismatch parameter is β α, ο) and (0,）；
    Wherein ,=l ..., w, and ≠ 0, j=...,n, Kj ≠ jO, m is the number of the antenna of base station side, and n is the number of the antenna of end side, and i0 is any number in l m, and jO is any number in l n；
    The computing module includes Unit the 5th or Unit the 6th；
    Unit the 5th is used for the channel matrix that all links are obtained according to following manner： Link chain (i0, j0) channel matrix is the Criterion-matrix H (i0, j0);
    Work as G,O) = Ji^_, β ο, j=MWhen ^U), wherein,M (0For the day of base station side
    MTE(iO) MRU(jO) line i mismatch parameter, M (0) for base station side antenna i0 mismatch parameter, Μ () for end side antenna j mismatch parameter, M^GO) for end side antenna jO mismatch parameter,
    The calculation formula of link chain (i, j0) channel matrix H (i, j0) is：
    (i0, (i0, calculation formula j) is channel matrix H j) link chain：
    The calculation formula of link chain (i, j) channel matrix H (i, j) is：
    H(i, j) = β(ί, j0) x β(ΪΟ, j) x H(i0, jO)；
    Unit the 6th is used for the channel matrix that all links are obtained according to following manner：
    Link chain (i0, j0) channel matrix is the Criterion-matrix H (i0, j0);
    When β (i) be base station side adjacent antenna between mismatch parameter ratio and ^ 0) be end side adjacent antenna between mismatch parameter ratio when,
    Link chain (i, j0) channel matrix H (i, j0) is obtained according to following calculation formula from H (i0, j0) recursion：
    H (i, j0)=β (, Μ χ H (i', j0), wherein, H (, jQ ") for the channel matrix of the base station side link adjacent and nearer with link chain (i0, j0) with link chain (i, j0)；
    Link chain (i0, channel matrix H (i0, being obtained according to following calculation formula from H (i0, j0) recursion j) j)：
    H (i0, j)=fi (i0, j) xH (i0, f), wherein, H (i0, f, for end side and link chain (i0, the channel matrix of j) adjacent and nearer with link chain (i0, j0) link；
    Link chain (i, j) channel matrix H (i, j) is obtained by any of the following two kinds method, or by the following two kinds method respectively obtain after be averaging processing again after obtain：
    Method one：The channel matrix for calculating link chain (i0, j0) to link chain (i, j0) is calculated and link again Chain (i, j0) it is adjacent and with the channel matrix of the links of link chain (i0, j0) farther out to link chain (i, j)；Method two：Calculate linkCHain (i0, j0) to link chain (i0, channel matrix j) calculate again with link chain (i0, it is j) adjacent and with link chain (i0, j0) channel matrix of the link farther out to link chain (i, j).
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1691536A (en) * 2004-04-28 2005-11-02 索尼株式会社 Wireless communication system
US20060146725A1 (en) * 2004-12-30 2006-07-06 Qinghua Li Downlink transmit beamforming
WO2007126036A1 (en) * 2006-04-27 2007-11-08 Sony Corporation Wireless communication system, wireless communication apparatus, and wireless communication method
CN101094021A (en) * 2006-06-20 2007-12-26 中兴通讯股份有限公司 Method and device of self-adapting communication with multiple antennae
CN101170340A (en) * 2007-11-22 2008-04-30 上海交通大学 Sub-channel distribution method for low-complexity, multi-user and multi-antenna OFDM system
CN101405957A (en) * 2006-03-23 2009-04-08 三菱电机株式会社 Method for selecting antennas in multiple-input, multiple-output wireless communications network

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1691536A (en) * 2004-04-28 2005-11-02 索尼株式会社 Wireless communication system
US20060146725A1 (en) * 2004-12-30 2006-07-06 Qinghua Li Downlink transmit beamforming
CN101405957A (en) * 2006-03-23 2009-04-08 三菱电机株式会社 Method for selecting antennas in multiple-input, multiple-output wireless communications network
WO2007126036A1 (en) * 2006-04-27 2007-11-08 Sony Corporation Wireless communication system, wireless communication apparatus, and wireless communication method
CN101094021A (en) * 2006-06-20 2007-12-26 中兴通讯股份有限公司 Method and device of self-adapting communication with multiple antennae
CN101170340A (en) * 2007-11-22 2008-04-30 上海交通大学 Sub-channel distribution method for low-complexity, multi-user and multi-antenna OFDM system

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