CN104321983A - Method for transmitting precoding matrix, UE (user equipment) and base station - Google Patents

Method for transmitting precoding matrix, UE (user equipment) and base station Download PDF

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CN104321983A
CN104321983A CN201380001909.2A CN201380001909A CN104321983A CN 104321983 A CN104321983 A CN 104321983A CN 201380001909 A CN201380001909 A CN 201380001909A CN 104321983 A CN104321983 A CN 104321983A
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value
pmi
code book
book index
pmi1
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CN104321983B (en
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吴强
张雷鸣
周永行
刘江华
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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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

The invention discloses a method for transmitting a precoding matrix, UE (user equipment) and a base station. The method includes determining a first precoding matrix in a first codebook set, wherein the first codebook set is a subset of a second codebook set, and the precoding matrixes are indicated by a first codebook index and a second codebook index; determining the value of a first precoding matrix indicator (PMI) and the value of a second PMI for indicating the first precoding matrix; and sending the PMI to the base station, wherein the PMI includes the value of the first PMI and the value of the second PMI for indicating the first precoding matrix. The method for transmitting a precoding matrix, the UE and the base station disclosed in the embodiment, without changing a feedback mode and a feedback bit, can indicate more precoding matrixes suitable for uniform linear antennas, and can guarantee that the performance applied to a dual polarized antenna is not influenced, thereby improving the system performance and enhancing the user experience.

Description

The method of transmitting pre-encoding matrix, subscriber equipment and base station
Technical field
The present invention relates to the communications field, particularly relate to the method for transmitting pre-encoding matrix in the communications field, subscriber equipment and base station.
Background technology
Multiple-input, multiple-output (Multiple Input Multiple Output, referred to as " MIMO ") wireless system is by (BeamForming, referred to as " BF ")/precoding of launching beam figuration and receive merging, can obtain diversity and array gain.The signal phasor utilizing the canonical system of BF or precoding to receive can be represented by following equalities (1) usually:
y=HVs+n （1）
Wherein, y represents the signal phasor of reception, and H represents channel matrix, and V represents pre-coding matrix, and s represents the symbolic vector of transmitting, and n represents measurement noises.
Optimum precoding needs the complete known channel state information of transmitter (Channel State Information, referred to as " CSI ") usually.Conventional method is that subscriber equipment (User Equipment, referred to as " UE ") quantizes instantaneous CSI, and feeds back to evolution base station (evolved NodeB, referred to as " eNB ").At existing Long Term Evolution (Long Term Evolution, referred to as " LTE ") in the 8th version (R8) of system, the CSI information of UE feedback can comprise order instruction (Rank Indicator, referred to as " RI "), pre-coding matrix instruction (Precoding Matrix Indicator, referred to as " PMI ") and channel quality instruction (Channel Quality Indicator, referred to as " CQI ") information etc., wherein RI and PMI indicates the number of plies and the pre-coding matrix of use respectively.The code book of LTE R8 is mainly Single User MIMO (Single User MIMO, referred to as " SU-MIMO ") designed by, pre-coding matrix wherein or code word demand fulfillment 8 phase-shift keying (8Phase Shift Keying, referred to as " 8PSK ") constraint, thus limit the precision of space quantization, this makes the transmission means for space quantization precision sensitivities such as multiuser MIMOs (Multiple User MIMO, referred to as " MU-MIMO "), and performance will be severely limited.
In order to reach higher system requirements, third generation partner program (3rd Generation Partnership Project, referred to as " 3GPP ") the further performance strengthening MU-MIMO of LTE system needs, this system also introduces cooperative multipoint transmission (Coordinated Multi-Point, referred to as " CoMP ") technology simultaneously.Current CoMP technology is based on the feedback of single community, and thus above-mentioned two kinds of technology are all had higher requirement to feedback performance.Due to feedback channel capacity constraint, codebook set size is also therefore limited, and this design for code book is had higher requirement.
3GPP LTE R8 system adopts single code book, and pre-coding matrix is indicated by RI and PMI.For 4 antennas, the corresponding relation of each code word in RI and PMI and code book is as shown in table 1 below:
Table 1
Wherein, represent by matrix row set s} form matrix, I is the unit matrix of 4 × 4, u nprovided by upper table 1.
In the code book of R8, be the pre-coding matrix of 1 for order (Rank), index is the pre-coding matrix of 0-7 is discrete Fourier transform (Discrete Fourier Transform, referred to as " DFT ") vector, this DFT vector is applicable to even linear array (Uniform Linear Array, referred to as " ULA ") antenna.DFT vector refers to the pre-coding matrix of T X 1, and this DFT vector v has the form as shown in equation (2) usually:
v=[1 e j2πm/N…e j2π(T-2)m/N e j2π(T-1)m/N] T （2）
Wherein, N, m are integer, and N=2 x, x is nonnegative integer, and namely N is the x power side of 2, and t element of this DFT vector v is e j2 π (t-1) m/N(t=1,2 ..., T).
In the tenth version (R10) of 3GPP LTE system, the code book that 8 antennas adopt is by two groups of DFT vector v m, between these two groups of DFT vectors, there is phase difference in composition wherein DFT vector v mand phase difference represented by following equalities (3):
Shown below is the codebook structure of 8 antennas, this codebook structure designs according to dual polarized antenna, and wherein, it is that namely to transmit the number of plies be 1 layer to 1(that table 2 shows order) 8 antenna codebooks; It is that namely to transmit the number of plies be 2 layers to 2(that table 3 shows order) 8 antenna codebooks; It is that namely to transmit the number of plies be 3 layers to 3(that table 4 shows order) 8 antenna codebooks; It is that namely to transmit the number of plies be 4 layers to 4(that table 5 shows order) 8 antenna codebooks.
Table 2
Table 3
Table 4
Table 5
Based on the codebook structure design of 8 antennas, by suitably revising DFT vector v, 4 antenna codebooks that order is 1 and 2 can be obtained.But for 4 antenna codebooks that order is 3 and 4, owing to can not ensure the orthogonality of each row of pre-coding matrix based on the codebook structure design of 8 antennas, thus can not obtain based on 8 antenna codebooks of 3GPP LTE R10 system.
The index of the pre-coding matrix of 8 antennas can by the first code book index i 1with the second code book index i 2representing, is 8 antenna codebooks of 1 for order, the first code book index i 1with the second code book index i 24 bits are all needed to represent.In order to the expense of feedback resources can be saved, PMI can represent with 4 bits, this just needs to carry out down-sampling (subsampling) to PMI or 8 antenna codebooks, wherein, the subpattern 2 down-sampling code book of physical uplink control channel (Physical Uplink Control Channel, referred to as " PUCCH ") the pattern 1-1 of 8 antennas is as shown in table 6.
Table 6
Code book is strengthened for 4 antennas, in order to while enhancing systematic function, do not increase the complexity of codebook design and feedback, the codebook structure design of 8 antennas can be continued to use, and the index of pre-coding matrix also can by the first code book index i 1with the second code book index i 2represent.In order to save the expense of feedback resources, PMI also can represent with 4 bits, and this also needs to carry out down-sampling (subsampling) to PMI or 4 antenna codebooks.
But, strengthen for code book for 4 antennas based on 8 antenna codebook structures, when pattern is the subpattern 2 of PUCCH pattern 1-1, continue to use after 8 antenna down-sampling code books as shown in table 6 carry out code book down-sampling, when order is 1, pre-coding matrix only has 4 DFT vectors, and 4 antenna codebooks of R8 system have 8 DFT vectors.Thus, when the antenna configured is even linear array ULA antenna, 4 antennas strengthen code book in the subpattern 2 of PUCCH pattern 1-1, and the pre-coding matrix being applicable to ULA antenna is less than the pre-coding matrix of R8 system, and performance loss is serious.
Summary of the invention
Embodiments provide a kind of method of transmitting pre-encoding matrix, subscriber equipment and base station, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna.
First aspect, provide a kind of method of transmitting pre-encoding matrix, the method comprises: in the first codebook set, determine the first pre-coding matrix, this the first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; Determine the first pre-coding matrix instruction value of PMI and the value of the 2nd PMI indicating this first pre-coding matrix; Send PMI, this PMI to base station and comprise the value of the PMI being used to indicate this first pre-coding matrix and the value of the 2nd PMI, so that this pre-coding matrix is determined according to this PMI in this base station; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the 2nd PMI has incidence relation.
In conjunction with first aspect, in the first possible implementation of first aspect, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprising: the value of this first code book index and/or span are uniquely determined accordingly by a PMI for the span of the 2nd PMI this second code book index corresponding.
In conjunction with first aspect, in the implementation that the second of first aspect is possible, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprise: the span of a PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, these at least two the first value set and these at least two the second value set have one-to-one relationship.
In conjunction with the implementation that the second of first aspect is possible, in the third possible implementation of first aspect, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In conjunction with first aspect, in the 4th kind of possible implementation of first aspect, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
In conjunction with first aspect, in the 5th kind of possible implementation of first aspect, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In conjunction with the first of first aspect or first aspect to any one the possible implementation in the 5th kind of possible implementation, in the 6th kind of possible implementation of first aspect, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In conjunction with the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation of first aspect, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In conjunction with the first of first aspect or first aspect to any one the possible implementation in the 5th kind of possible implementation, in the 8th kind of possible implementation of first aspect, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
In conjunction with the first of first aspect or first aspect to any one the possible implementation in the 5th kind of possible implementation, in the 9th kind of possible implementation of first aspect, this sends PMI to base station, comprising: on a up channel, send this PMI to this base station.
Second aspect, provide a kind of method of transmitting pre-encoding matrix, the method comprises: in the first codebook set, determine the first pre-coding matrix, this first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; Determine the combined coding value indicating this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; The pre-coding matrix instruction PMI comprising this combined coding value is sent, so that this first pre-coding matrix is determined according to this PMI in this base station to base station.
In conjunction with second aspect, in the first possible implementation of second aspect, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In conjunction with the first possible implementation of second aspect or second aspect, in the implementation that the second of second aspect is possible, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
7th aspect, provide a kind of method of transmitting pre-encoding matrix, the method comprises: pre-coding matrix instruction PMI, this PMI of receiving subscriber equipment transmission comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI; According to the value of a PMI and the value of the 2nd PMI, determine the value of the first code book index and the value of the second code book index, this first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and this first codebook set is the subset of this second codebook set; According to the value of this first code book index and the value of this second code book index, in this second codebook set, determine this first pre-coding matrix; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the value of the 2nd PMI has incidence relation.
In conjunction with the 7th aspect, in the first possible implementation in the 7th, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprising: the value of this first code book index and/or span are uniquely determined accordingly by a PMI for the span of the 2nd PMI this second code book index corresponding.
In conjunction with the 7th aspect, in the implementation that the second in the 7th is possible, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprise: the span of a PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, these at least two the first value set and these at least two the second value set have one-to-one relationship.
In conjunction with the implementation that the second of the 7th aspect is possible, in the third possible implementation in the 7th, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In conjunction with the 7th aspect, in the 4th kind of possible implementation in the 7th, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
In conjunction with the 7th aspect, in the 5th kind of possible implementation in the 7th, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 6th kind of possible implementation in the 7th, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In conjunction with the 6th kind of possible implementation of the 7th aspect, in the 7th kind of possible implementation in the 7th, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 8th kind of possible implementation in the 7th, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 9th kind of possible implementation in the 7th, the pre-coding matrix instruction PMI that this reception subscriber equipment sends, comprising: on a up channel, receive this PMI that this subscriber equipment sends.
Fourth aspect, provide a kind of method of transmitting pre-encoding matrix, the method comprises: pre-coding matrix instruction PMI, this PMI of receiving subscriber equipment transmission comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set; According to this combined coding value, determine the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; According to the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, determine this first pre-coding matrix in the second codebook set being applied to four antennas, this first codebook set is the subset of this second codebook set.
In conjunction with fourth aspect, in the first possible implementation of fourth aspect, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In conjunction with the first possible implementation of fourth aspect or fourth aspect, in the implementation that the second of fourth aspect is possible, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
5th aspect, provide a kind of subscriber equipment, this subscriber equipment comprises: the first determination module, for determining the first pre-coding matrix in the first codebook set, this the first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; Second determination module, for determining the first pre-coding matrix instruction value of PMI and value of the 2nd PMI of this first pre-coding matrix indicating this first determination module to determine; Sending module, is used to indicate the value of a PMI of this first pre-coding matrix and the value of the 2nd PMI, so that this pre-coding matrix is determined according to this PMI in this base station for what send to base station that PMI, this PMI comprise that this second determination module determines; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the 2nd PMI has incidence relation.
In conjunction with the 5th aspect, in the first the possible implementation in the 5th, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
In conjunction with the 5th aspect, in the implementation that the second in the 5th is possible, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
In conjunction with the implementation that the second of the 5th aspect is possible, in the third possible implementation in the 5th, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In conjunction with the 5th aspect, in the 4th kind of possible implementation in the 5th, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
In conjunction with the 5th aspect, in the 5th kind of possible implementation in the 5th, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In conjunction with the first of the 5th aspect or the 5th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 6th kind of possible implementation in the 5th, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In conjunction with the 6th kind of possible implementation of the 5th aspect, in the 7th kind of possible implementation in the 5th, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1e j2 π m/32] t, m and n is nonnegative integer.
In conjunction with the first of the 5th aspect or the 5th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 8th kind of possible implementation in the 5th, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
In conjunction with the first of the 5th aspect or the 5th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 9th kind of possible implementation in the 5th, this sending module specifically for: on a up channel, send this PMI to this base station.
6th aspect, provide a kind of subscriber equipment, this subscriber equipment comprises: the first determination module, for determining the first pre-coding matrix in the first codebook set, this first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; Second determination module, for determining the combined coding value of this first pre-coding matrix indicating this first determination module to determine, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; Sending module, for comprising this combined coding value that this second determination module is determined to the instruction of base station transmission pre-coding matrix PMI, this PMI, so that this first pre-coding matrix is determined according to this PMI in this base station.
In conjunction with the 6th aspect, in the first possible implementation in the 6th, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In conjunction with the first possible implementation of the 6th aspect or the 6th aspect, in the implementation that the second in the 6th is possible, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
7th aspect, provide a kind of base station, this base station comprises: receiver module, and pre-coding matrix instruction PMI, this PMI of sending for receiving subscriber equipment comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI; First determination module, for the value of a PMI that receives according to this receiver module and the value of the 2nd PMI, determine the value of the first code book index and the value of the second code book index, this first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and this first codebook set is the subset of this second codebook set; Second determination module, for the value of this first code book index and the value of this second code book index determined according to this first determination module, determines this first pre-coding matrix in this second codebook set; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the value of the 2nd PMI has incidence relation.
In conjunction with the 7th aspect, in the first the possible implementation in the 7th, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
In conjunction with the 7th aspect, in the implementation that the second in the 7th is possible, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
In conjunction with the implementation that the second of the 7th aspect is possible, in the third possible implementation in the 7th, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In conjunction with the 7th aspect, in the 4th kind of possible implementation in the 7th, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
In conjunction with the 7th aspect, in the 5th kind of possible implementation in the 7th, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 6th kind of possible implementation in the 7th, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In conjunction with the 6th kind of possible implementation of the 7th aspect, in the 7th kind of possible implementation in the 7th, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 8th kind of possible implementation in the 7th, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
In conjunction with the first of the 7th aspect or the 7th aspect to any one the possible implementation in the 5th kind of possible implementation, in the 9th kind of possible implementation in the 7th, this receiver module specifically for: receive on a up channel this subscriber equipment send this PMI.
Eighth aspect, provides a kind of base station, and this base station comprises: receiver module, and pre-coding matrix instruction PMI, this PMI of sending for receiving subscriber equipment comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set; First determination module, for this combined coding value received according to this receiver module, determine the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; Second determination module, for the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix determined according to this first determination module, in the second codebook set being applied to four antennas, determine this first pre-coding matrix, this first codebook set is the subset of this second codebook set.
In conjunction with eighth aspect, in the first possible implementation of eighth aspect, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In conjunction with the first possible implementation of eighth aspect or eighth aspect, in the implementation that the second of eighth aspect is possible, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
Based on technique scheme, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, subscriber equipment and base station, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in the embodiment of the present invention below, apparently, accompanying drawing described is below only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the indicative flowchart of the method for transmitting pre-encoding matrix according to the embodiment of the present invention.
Fig. 2 is another indicative flowchart of the method for transmitting pre-encoding matrix according to the embodiment of the present invention.
Fig. 3 is an indicative flowchart again of the method for transmitting pre-encoding matrix according to the embodiment of the present invention.
Fig. 4 is an indicative flowchart again of the method for transmitting pre-encoding matrix according to the embodiment of the present invention.
Fig. 5 is the schematic block diagram of the subscriber equipment according to the embodiment of the present invention.
Fig. 6 is another schematic block diagram of the subscriber equipment according to the embodiment of the present invention.
Fig. 7 is the schematic block diagram of the base station according to the embodiment of the present invention.
Fig. 8 is another schematic block diagram of the base station according to the embodiment of the present invention.
Fig. 9 is a schematic block diagram again of the subscriber equipment according to the embodiment of the present invention.
Figure 10 is a schematic block diagram again of the subscriber equipment according to the embodiment of the present invention.
Figure 11 is a schematic block diagram again of the base station according to the embodiment of the present invention.
Figure 12 is a schematic block diagram again of the base station according to the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of protection of the invention.
Should understand, the technical scheme of the embodiment of the present invention can be applied to various communication system, such as: global system for mobile telecommunications (Global System of Mobile communication, referred to as " GSM ") system, code division multiple access (Code Division Multiple Access, referred to as " CDMA ") system, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, referred to as " WCDMA ") system, GPRS (General Packet Radio Service, referred to as " GPRS "), Long Term Evolution (Long Term Evolution, referred to as " LTE ") system, LTE Frequency Division Duplexing (FDD) (Frequency Division Duplex, referred to as " FDD ") system, LTE time division duplex (Time Division Duplex, referred to as " TDD "), universal mobile telecommunications system (Universal Mobile Telecommunication System, referred to as " UMTS ") or global interconnection inserting of microwave (Worldwide Interoperability for Microwave Access, referred to as " WiMAX ") communication system etc.
Will also be understood that, in embodiments of the present invention, subscriber equipment (User Equipment, referred to as " UE ") terminal (Terminal) can be referred to as, travelling carriage (Mobile Station, referred to as " MS ") or mobile terminal (Mobile Terminal) etc., this subscriber equipment can through wireless access network (Radio Access Network, referred to as " RAN ") communicate with one or more core net, such as, subscriber equipment can be mobile phone (or being called " honeycomb " phone) or the computer etc. with mobile terminal, such as, subscriber equipment can also be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network switched voice and/or data.
In embodiments of the present invention, base station can be base station (the Base Transceiver Station in GSM or CDMA, referred to as " BTS "), also can be the base station (NodeB, referred to as " NB ") in WCDMA, can also be evolved base station (the Evolutional Node B in LTE, referred to as " ENB or e-NodeB "), the present invention does not limit, but for convenience of description, following embodiment will be described for ENB.
Fig. 1 shows the indicative flowchart of the method 100 according to the transmitting pre-encoding matrix of the embodiment of the present invention, and the method 100 such as can be performed by subscriber equipment.The method 100 comprises:
S110, determines the first pre-coding matrix in the first codebook set, and this first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index;
S120, determines the first pre-coding matrix instruction value of PMI and the value of the 2nd PMI indicating this first pre-coding matrix;
S130, sends PMI, this PMI and comprises the value of the PMI being used to indicate this first pre-coding matrix and the value of the 2nd PMI, so that this pre-coding matrix is determined according to this PMI in this base station to base station;
Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the 2nd PMI has incidence relation.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Specifically, in S110, user equipment (UE) such as based on channel condition information (Channel State Information, referred to as " CSI "), can determine that in the first codebook set UE expects the first pre-coding matrix that base station eNB uses when sending downlink data.This first codebook set can indicate PMI I by the first pre-coding matrix pMI1and the second pre-coding matrix instruction PMI I pMI2instruction, this first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises can by the first code book index i 1with the second code book index i 2instruction.
In embodiments of the present invention, a PMI I pMI1value and this first code book index i 1value can have the first corresponding relation, this first corresponding relation can be functional relation, also can be mapping relations, such as i 1=2*I pMI1; 2nd PMI I pMI2value and this second code book index i 2value can have the second corresponding relation, this second corresponding relation can be functional relation, also can be mapping relations, such as, the 2nd PMI I pMI2value be used to indicate the second code book index i 2span in value sequence number etc.
In embodiments of the present invention, the span of this second code book index that the span of a PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation.Alternatively, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprising: the value of this first code book index and/or span are uniquely determined accordingly by a PMI for the span of the 2nd PMI this second code book index corresponding.
Comprise for the first codebook set the pre-coding matrix that the first code book index i1 as shown in Table 7 and the second code book index i2 indicates to be described.
Table 7
i 1=2*I PMI1 i 2（I PMI2） DFT vector
0(m=0)，I PMI1=0 0（I PMI2=0） Be
0(m=0)，I PMI1=0 2（I PMI2=1） No
2(m=4)，I PMI1=1 1（I PMI2=0） Be
2(m=4)，I PMI1=1 3（I PMI2=1） No
4(m=8)，I PMI1=2 0（I PMI2=0） No
4(m=8)，I PMI1=2 2（I PMI2=1） Be
6(m=12)，I PMI1=3 1（I PMI2=0） No
6(m=12)，I PMI1=3 3（I PMI2=1） Be
8(m=16)，I PMI1=4 0（I PMI2=0） Be
8(m=16)，I PMI1=4 2（I PMI2=1） No
10(m=20)，I PMI1=5 1（I PMI2=0） Be
10(m=20)，I PMI1=5 3（I PMI2=1） No
12(m=24)，I PMI1=6 0（I PMI2=0） No
12(m=24)，I PMI1=6 2（I PMI2=1） Be
14(m=28)，I PMI1=7 1（I PMI2=0） No
14(m=28)，I PMI1=7 3（I PMI2=1） Be
As shown in table 7, as a PMI I pMI1span when being (0,2,4,6), the corresponding first code book index i of a PMI 1span be (0,4,8,12), now, the 2nd PMI I pMI2corresponding this second code book index i 2span be (0,2); As a PMI I pMI1span when being (1,3,5,7), the corresponding first code book index i of a PMI 1span be (2,6,10,14), now, the 2nd PMI I pMI2corresponding this second code book index i 2span be (1,3).
Therefore, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span, and namely the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI and/or span.
Such as, when the value of a PMI is 0, or when the value of a PMI this first code book index corresponding is 0, the span of the 2nd PMI this second code book index corresponding can only be (0,2); Again such as, when the span of a PMI is (1,3) time, or the span of a PMI this first code book index corresponding is when be (2,6), the span of the 2nd PMI this second code book index accordingly can only be (1,3), namely, when determining value and/or the span of a PMI this first code book index corresponding, maybe when determining value and/or the span of a PMI, determine the span of the 2nd PMI this second code book index corresponding simultaneously.
In embodiments of the present invention, alternatively, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprise: the span of a PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
Should be understood that the quantity of the first value set is equal with the quantity of the second value set.Should also be understood that in the first value set, each element is different, in the second value set, each element is also different.
Such as, as shown in table 7, the span of a PMI this first code book index corresponding comprises two the first value set (0,4,8,12) and (2,6,10,14); The span of the 2nd PMI this second code book index corresponding comprises two the second value set (0,2) and (1,3); Wherein, the first value set (0,4,8,12) is corresponding with the second value set (0,2), and the first value set (2,6,10,14) is corresponding with the second value set (1,3).
Alternatively, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In embodiments of the present invention, because the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI has incidence relation, thus the method for the transmitting pre-encoding matrix of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
In S120, subscriber equipment can determine the first code book index i indicating this first pre-coding matrix 1with the second code book index i 2and the first corresponding relation can be had based on the value of the value of a PMI and this first code book index, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, determine the first pre-coding matrix instruction value of PMI and the value of the 2nd PMI indicating this first pre-coding matrix.
In embodiments of the present invention, alternatively, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
As can be seen from Table A 1, work as I pMI1span when being (0,2,4,6), namely work as I pMI1corresponding i 1span when being (0,4,8,12), corresponding i 2value be scope be (0,2).Work as I pMI1span when being (1,3,5,7), namely work as I pMI1corresponding i 1span when being (2,6,10,14), corresponding i 2value be scope be (1,3).I.e. I pMI2corresponding i 2value or span and I pMI1corresponding i 1value or span be associated.
Should be understood that the embodiment of the present invention only with the I shown in Table A 1 pMI1, I pMI2, i 1and i 2span be that example is described, but the embodiment of the present invention is not limited to this, such as, I pMI1, I pMI2, i 1and i 2can also be other span, can I be made equally pMI2corresponding i 2value or span and I pMI1corresponding i 1value or span be associated, and corresponding first codebook set still can comprise eight DFT vectors.
In embodiments of the present invention, alternatively, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In S130, subscriber equipment such as on PUCCH channel, Physical Uplink Shared Channel (Physical Uplink Shared Channel, referred to as " PUSCH ") or other channel on send PMI, this PMI to base station and comprise the value of the PMI being used to indicate this first pre-coding matrix and the value of the 2nd PMI.
Alternatively, subscriber equipment sends this PMI to base station on a up channel.This up channel can be the channels such as PUCCH or PUSCH.Such as, subscriber equipment transmits this PMI on a PUCCH, or subscriber equipment transmits this PMI on a PUSCH.Should be understood that subscriber equipment also can send respectively to base station and be used to indicate the value of a PMI of this first pre-coding matrix and the value of the 2nd PMI, the embodiment of the present invention is not limited to this.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, the quantity of value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.Such as, as shown in table 7, the bit number carrying the value of the 2nd PMI is the span of the 1, two PMI this second code book index corresponding is (0,2) and (Isosorbide-5-Nitrae), and the value quantity of this second code book index is 4, is greater than 2(that is 2 1).Thus, UE can indicate more DFT vector by less resource.
In embodiments of the present invention, alternatively, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
Such as, as shown in table 7, the first codebook set being applied to 4 antennas according to the embodiment of the present invention comprises 8 DFT vectors, identical with the DFT vector in 3GPP LTE R8 system, thus can not affect systematic function when being applied to ULA antenna, and each pre-coding matrix that this first codebook set comprises is applicable to dual polarized antenna.
In embodiments of the present invention, alternatively, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
In addition, associative list A1 and Table A 2 known, work as i 1=0 and i 2when=0, work as i 1=2 and i 2when=1, work as i 1=4 and i 2when=2, work as i 1=6 and i 2when=3, work as i 1=8 and i 2when=0, work as i 1=10 and i 2when=1, work as i 1=12 and i 2when=2 or work as i 1=1 and i 2when=3, corresponding pre-coding matrix be all that DFT is vectorial, has 8 DFT vectors in 16 pre-coding matrixes namely in embodiments of the present invention after down-sampling.
In embodiments of the present invention, can determine that order is 4 antenna codebooks of 2 according to table 3, and the down-sampling code book shown in table 6 can be reused.According to the order sub sampling shown in 4 antenna codebook structures and table 6 that is 2,16 orders be 2 pre-coding matrix comprise 32 vectors, and comprise 8 DFT vectors equally.The embodiment of the present invention can when carrying out code book down-sampling and do not change feedback model and feedback bits thus, instruction is more applicable to the pre-coding matrix of even linear array antenna, and each pre-coding matrix in the codebook set after down-sampling can both be applicable to dual polarized antenna, thus can ensure not affect the performance being applied to dual polarized antenna, and systematic function can be improved, and strengthen Consumer's Experience.
Should understand, in embodiments of the present invention, first codebook set is described to comprise the pre-coding matrix shown in table 7, second codebook set is described to comprise the pre-coding matrix shown in Table A 2, but the embodiment of the present invention is not limited to this, the first codebook set and the second codebook set can also have other codebook structure.
Should be understood that base station (eNB) can first to UE configurating channel state information reference signals (Channel State Information Reference Signal, referred to as " CSI-RS "), particularly, for the N of base station troot antenna or N tindividual antenna port, base station configures N to UE tthe resource of the antenna port of individual CSI-RS, wherein N tfor natural number, such as N tequal 4.UE thus can in corresponding CSI-RS measure channel quality, and RI, PMI, CQI etc. of using when can determine that UE expects that eNB sends downlink data.UE can configure on the feedback resources to this UE, by this CSI feedback to base station at eNB after determining the channel condition informations such as RI, PMI, CQI (Channel State Information, referred to as " CSI ").Such as, base station is the subpattern 2 of PUCCH pattern 1-1 to the feedback model that UE configures, then UE feeds back RI, at feedback the one PMI I in the subframe of feedback RI pMI1, the 2nd PMI I pMI2i is fed back respectively with in the subframe of CQI pMI1, I pMI2and CQI.For simplicity, do not repeat them here.
Should also be understood that in embodiments of the present invention, pre-coding matrix set can be called code book, and each pre-coding matrix in pre-coding matrix set can be called code word, but the present invention is not limited to this.
Will also be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process does not also mean that the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and should not form any restriction to the implementation process of the embodiment of the present invention.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Fig. 2 shows the indicative flowchart of the method 200 according to the transmitting pre-encoding matrix of the embodiment of the present invention, and the method 200 such as can be performed by subscriber equipment.The method 200 comprises:
S210, determines the first pre-coding matrix in the first codebook set, and this first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index;
S220, determine the combined coding value indicating this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5;
S230, sends the pre-coding matrix instruction PMI comprising this combined coding value, so that this first pre-coding matrix is determined according to this PMI in this base station to base station.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Specifically, in 3GPP LTE R10 system, for 8 antenna codebooks, the subpattern 1 of PUCCH feedback pattern 1-1 adopts order RI as shown in table 8 and the first code book index i 1the mode of combined coding.
Table 8
In embodiments of the present invention, when 4 antennas strengthen the subpattern 1 of code book support PUCCH feedback pattern 1-1, namely order RI and the first code book index i are supported when 4 antennas strengthen code books 1during combined coding, 4 antennas can be divided into strengthen code book and only support that order RI is the combined coding situation of 1 and 2, and 4 antennas strengthen the combined coding situation that code book support order RI is 1 to 4.To be described respectively below.
When strengthening code book according to 4 antennas of the embodiment of the present invention and only supporting that order RI is the combined coding of 1 and 2, in embodiments of the present invention, alternatively, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix is by shown in lower list B1:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
As shown shown in B1,4 antennas that this table B1 determines strengthen code book and have employed down-sampling, and carry this combined coding value I rI/PMI1bit number be 4, i.e. RI and i 1combined coding one share 4 bits and represent.
Strengthen code book according to 4 antennas of the embodiment of the present invention and also can not adopt down-sampling, now code book is meticulousr, and such as, as shown in table B4, this 4 antenna strengthens code book and also only supports that order RI is the combined coding of 1 and 2, but in this code book, RI and i 1combined coding need altogether to represent with 5 bits.
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
When strengthening code book according to 4 antennas of the embodiment of the present invention and supporting order RI to be the combined coding of 1 to 4, according to the codebook structure of 8 antennas, can determine order be 3 or 4(namely to transmit the number of plies be 3 layers or 4 layers) 4 antennas strengthen code books, respectively as shown in Table 9 and Table 10, wherein, the first code book index i 1value be fixed as 0, do not need additional bit to represent.
Table 9
Table 10
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In embodiments of the present invention, alternatively, when the bit number of this combined coding value of carrying is 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is determined by lower list table B5:
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In table B5, order RI be 1 and 2 code book carried out down-sampling, and RI and i 1combined coding need altogether to represent with 5 bits.
In order to improve RI and i further 1the feedback performance of combined coding, the bit number of feedback can be restricted to 4 bits, now, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix is by lower list B2 or show B3 and determine:
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In table B2, when order RI is 1, corresponding i 1there are 8 kinds of states; When order RI is 2, corresponding i 1there are 6 kinds of states; When order RI is 3 and 4, corresponding i 1there is a kind of state respectively, and RI and i 1combined coding represent with 4 bits altogether only.In table B3, when order RI is 1 and 2, corresponding i 1there are 7 kinds of states respectively; When order RI is 3 and 4, corresponding i 11 kind of state respectively, and RI and i 1combined coding represent with 4 bits altogether only.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Above composition graphs 1 and Fig. 2, describes the method for the transmitting pre-encoding matrix according to the embodiment of the present invention in detail from the angle of subscriber equipment, below in conjunction with Fig. 3 and Fig. 4, describe the method according to the transmitting pre-encoding matrix of the embodiment of the present invention from the angle of base station.
As shown in Figure 3, the method 300 according to the transmitting pre-encoding matrix of the embodiment of the present invention can be performed by base station, and the method 300 comprises:
S310, pre-coding matrix instruction PMI, this PMI of receiving subscriber equipment transmission comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI;
S320, according to the value of a PMI and the value of the 2nd PMI, determine the value of the first code book index and the value of the second code book index, this first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and this first codebook set is the subset of this second codebook set;
S330, according to the value of this first code book index and the value of this second code book index, determines this first pre-coding matrix in this second codebook set;
Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the value of the 2nd PMI has incidence relation.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Should be understood that in embodiments of the present invention, the CSI information that base station can be sent by UE, receive the PMI that UE sends, this CSI information can also comprise RI and CQI etc.Base station can obtain the pre-coding matrix of UE feedback according to RI and PMI, and the channel quality that can obtain when using this pre-coding matrix according to CQI.When Single User MIMO transmission is carried out to UE in base station, base station can use this pre-coding matrix to carry out precoding to the downlink data of UE, can determine the modulation coding mode sending this downlink data according to CQI simultaneously.When multi-user MIMO transmissions is carried out to UE in base station, the such as multiuser MIMO of two users, the pre-coding matrix of the pre-coding matrix that base station can be fed back according to this UE and pairing UE feedback, by ZF (Zero Forcing, referred to as " ZF ") method, the pre-coding matrix of the multi-user interference that can be eliminated.Thus, base station can use this pre-coding matrix to carry out precoding to the downlink data of multiuser MIMO.Further, base station can according to the CQI of two user feedbacks, determines modulation coding mode when these two users carry out multi-user MIMO transmissions.For simplicity, do not repeat them here.
In embodiments of the present invention, alternatively, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprising: the value of this first code book index and/or span are uniquely determined accordingly by a PMI for the span of the 2nd PMI this second code book index corresponding.
Alternatively, the span of this second code book index that the span of the one PMI this first code book index corresponding is corresponding to the 2nd PMI has incidence relation, comprise: the span of a PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
In embodiments of the present invention, alternatively, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
In embodiments of the present invention, alternatively, the quantity of value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
Alternatively, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In embodiments of the present invention, alternatively, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In embodiments of the present invention, alternatively, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
In embodiments of the present invention, alternatively, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
Alternatively, in embodiments of the present invention, the pre-coding matrix instruction PMI that this reception subscriber equipment sends, comprising: on a up channel, receive this PMI that this subscriber equipment sends.
Should be understood that base station that base station side describes and the mutual of subscriber equipment and correlation properties, function etc. corresponding with the description with reference to figure 1 of user equipment side, for simplicity, do not repeat them here.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Fig. 4 shows the indicative flowchart of the method 300 according to the transmitting pre-encoding matrix of the embodiment of the present invention, and the method 300 can be performed by subscriber equipment.As shown in Figure 4, the method 300 comprises:
S410, pre-coding matrix instruction PMI, this PMI of receiving subscriber equipment transmission comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set;
S420, according to this combined coding value, determine the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5;
S430, according to the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, determine this first pre-coding matrix in the second codebook set being applied to four antennas, this first codebook set is the subset of this second codebook set.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
Should be understood that base station that base station side describes and the mutual of subscriber equipment and correlation properties, function etc. corresponding with the description with reference to figure 2 of user equipment side, for simplicity, do not repeat them here.
Therefore, the method of the transmitting pre-encoding matrix of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Above composition graphs 1 to Fig. 4, describes the method for the transmitting pre-encoding matrix according to the embodiment of the present invention in detail, below in conjunction with Fig. 5 to Figure 12, describes the subscriber equipment according to the embodiment of the present invention and base station in detail.
Fig. 5 shows the schematic block diagram of the subscriber equipment 600 according to the embodiment of the present invention, and as shown in Figure 5, this subscriber equipment 600 comprises:
First determination module 610, for determining the first pre-coding matrix in the first codebook set, this first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index;
Second determination module 620, for determining the first pre-coding matrix instruction value of PMI and value of the 2nd PMI of this first pre-coding matrix indicating this first determination module 610 to determine;
Sending module 630, is used to indicate the value of a PMI of this first pre-coding matrix and the value of the 2nd PMI, so that this pre-coding matrix is determined according to this PMI in this base station for what send to base station that PMI, this PMI comprise that this second determination module 620 determines;
Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the 2nd PMI has incidence relation.
Therefore, the subscriber equipment of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
Alternatively, as an embodiment, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
In embodiments of the present invention, alternatively, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
Alternatively, as an embodiment, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
Alternatively, as an embodiment, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In embodiments of the present invention, alternatively, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In embodiments of the present invention, alternatively, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
Alternatively, as an embodiment, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
Alternatively, as an embodiment, this sending module 630 specifically for: on a up channel, send this PMI to this base station.
Should understand, may correspond in performing the subscriber equipment according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the subscriber equipment 600 of the embodiment of the present invention, and above-mentioned and other operation of the modules in subscriber equipment 600 and/or function are in order to realize the corresponding flow process of the method in Fig. 1, for simplicity, do not repeat them here.
Therefore, the subscriber equipment of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Fig. 6 shows the schematic block diagram of the subscriber equipment 700 according to the embodiment of the present invention.As shown in Figure 7, this subscriber equipment 700 comprises:
First determination module 710, for determining the first pre-coding matrix in the first codebook set, this first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index;
Second determination module 720, for determining the combined coding value of this first pre-coding matrix indicating this first determination module 710 to determine, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5;
Sending module 730, for comprising this combined coding value that this second determination module 720 is determined to the instruction of base station transmission pre-coding matrix PMI, this PMI, so that this first pre-coding matrix is determined according to this PMI in this base station.
Therefore, the subscriber equipment of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
Should understand, may correspond in performing the subscriber equipment according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the subscriber equipment 700 of the embodiment of the present invention, and above-mentioned and other operation of the modules in subscriber equipment 700 and/or function are in order to realize the corresponding flow process of the method in Fig. 2, for simplicity, do not repeat them here.
Therefore, the subscriber equipment of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Fig. 7 shows the schematic block diagram of the base station 800 according to the embodiment of the present invention.As shown in Figure 7, this base station 800 comprises:
Receiver module 810, pre-coding matrix instruction PMI, this PMI of sending for receiving subscriber equipment comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI;
First determination module 820, for the value of a PMI that receives according to this receiver module 810 and the value of the 2nd PMI, determine the value of the first code book index and the value of the second code book index, this first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and this first codebook set is the subset of this second codebook set;
Second determination module 830, for the value of this first code book index and the value of this second code book index determined according to this first determination module 820, determines this first pre-coding matrix in this second codebook set;
Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the value of the 2nd PMI has incidence relation.
Therefore, the base station of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
In embodiments of the present invention, alternatively, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
Alternatively, as an example, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
Alternatively, as an example, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
Alternatively, as an example, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
In embodiments of the present invention, alternatively, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2
0 0 0 0
0 0 1 2
1 2 0 1
1 2 1 3
2 4 0 0
2 4 1 2
3 6 0 1
3 6 1 3
4 8 0 0
4 8 1 2
5 10 0 1
5 10 1 3
6 12 0 0
6 12 1 2
7 14 0 1
7 14 1 3
Wherein, I pMI1represent a PMI; I pMI2represent the 2nd PMI; i 1represent this first code book index; i 2represent this second code book index i 2.
In embodiments of the present invention, alternatively, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
Alternatively, as an example, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
Alternatively, in embodiments of the present invention, this receiver module specifically for: receive on a up channel this subscriber equipment send this PMI.
Should understand, may correspond in performing the base station according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the base station 800 of the embodiment of the present invention, and above-mentioned and other operation of the modules in base station 800 and/or function are in order to realize the corresponding flow process of the method in Fig. 3, for simplicity, do not repeat them here.
Therefore, the base station of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Fig. 8 shows the schematic block diagram of the base station 900 according to the embodiment of the present invention.As shown in Figure 8, this base station 900 comprises:
Receiver module 910, pre-coding matrix instruction PMI, this PMI of sending for receiving subscriber equipment comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set;
First determination module 920, for this combined coding value received according to this receiver module 910, determine the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5;
Second determination module 930, for the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix determined according to this first determination module 920, in the second codebook set being applied to four antennas, determine this first pre-coding matrix, this first codebook set is the subset of this second codebook set.
Therefore, the base station of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Table B3
I RI/PMI1 RI i 1
0-6 1 2I RI/PMI1
7-13 2 2（I RI/PMI1-8）
14 3 0
15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
In embodiments of the present invention, alternatively, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1
0-15 1 I RI/PMI1
16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
16 3 0
17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
Should understand, may correspond in performing the base station according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the base station 900 of the embodiment of the present invention, and above-mentioned and other operation of the modules in base station 900 and/or function are in order to realize the corresponding flow process of the method in Fig. 4, for simplicity, do not repeat them here.
Therefore, the base station of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
In addition, term " system " and " network " are often used interchangeably in this article herein.Term "and/or" herein, being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.In addition, character "/" herein, general expression forward-backward correlation is to the relation liking a kind of "or".
Should be understood that in embodiments of the present invention, " B corresponding to A " represents that B and A is associated, and can determine B according to A.But should also be understood that and determine B and do not mean that only to determine B according to A according to A, B can also be determined according to A and/or out of Memory.
As shown in Figure 9, the embodiment of the present invention additionally provides a kind of subscriber equipment 10, and this subscriber equipment 10 comprises processor 11, memory 12, bus system 13 and transmitter 14.Wherein, processor 11, memory 12 are connected by bus system 13 with transmitter 14, and this memory 12 is for storing instruction, and the instruction that this processor 11 stores for performing this memory 12, sends signal to control transmitter 14.Wherein, this processor 11 for: in the first codebook set, determine the first pre-coding matrix, this first codebook set is the subset of the second codebook set, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; This processor 11 is also for the first pre-coding matrix instruction value of PMI and value of the 2nd PMI of determining indicating this first pre-coding matrix; This transmitter 14 for: send PMI, this PMI to base station and comprise the value of the PMI being used to indicate this first pre-coding matrix and the value of the 2nd PMI, so that this pre-coding matrix is determined according to this PMI in this base station; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the 2nd PMI has incidence relation.
Therefore, the subscriber equipment of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Should understand, in each embodiment of the present invention, this processor can be CPU (Central Processing Unit, referred to as " CPU "), this processor can also be other general processors, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components etc.The processor etc. of general processor can be microprocessor or this processor also can be any routine.
This memory can comprise read-only memory and random access memory, and provides instruction and data to processor.A part for memory can also comprise nonvolatile RAM.Such as, the information of all right storage device type of memory.
This bus system, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system.
In implementation procedure, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware in processor or software form.Step in conjunction with the method disclosed in the embodiment of the present invention can directly be presented as that hardware processor is complete, or hardware in purpose processor and software module combination complete.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory, and processor reads the information in memory, completes the step of said method in conjunction with its hardware.For avoiding repetition, be not described in detail here.
Alternatively, as an embodiment, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
Alternatively, as an embodiment, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
Alternatively, as an embodiment, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
Alternatively, as an embodiment, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
Alternatively, as an embodiment, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
Alternatively, as an embodiment, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1.
Alternatively, as an embodiment, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2.
Alternatively, as an embodiment, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
Alternatively, as an embodiment, transmitter 14 specifically for sending this PMI to this base station on a up channel.
Should understand, may correspond in performing the subscriber equipment according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the subscriber equipment 10 of the embodiment of the present invention, and subscriber equipment 600, and above-mentioned and other operation of the modules in subscriber equipment 10 and/or function are in order to realize the corresponding flow process of the method in Fig. 1, for simplicity, do not repeat them here.
Therefore, the subscriber equipment of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
As shown in Figure 10, the embodiment of the present invention additionally provides a kind of subscriber equipment 20, and this subscriber equipment 20 comprises processor 21, memory 22, bus system 23 and transmitter 24.Wherein, processor 21, memory 22 are connected by bus system 23 with transmitter 24, and this memory 22 is for storing instruction, and the instruction that this processor 21 stores for performing this memory 22, sends signal to control transmitter 24.Wherein, this processor 21 for: in the first codebook set, determine the first pre-coding matrix, this first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that this second codebook set comprises is indicated by the first code book index and the second code book index; This processor 21 also for: determine the combined coding value indicating this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; This transmitter 24 for: to base station send comprise this combined coding value pre-coding matrix instruction PMI so that this first pre-coding matrix is determined according to this PMI in this base station.
Alternatively, as an embodiment, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine.
Alternatively, as an embodiment, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine.
Should understand, may correspond in performing the subscriber equipment according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the subscriber equipment 20 of the embodiment of the present invention, and subscriber equipment 700, and above-mentioned and other operation of the modules in subscriber equipment 20 and/or function are in order to realize the corresponding flow process of the method in Fig. 2, for simplicity, do not repeat them here.
Therefore, the subscriber equipment of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
As shown in figure 11, the embodiment of the present invention additionally provides a kind of base station 30, and this base station 30 comprises processor 31, memory 32, bus system 33 and receiver 34.Wherein, processor 31, memory 32 are connected by bus system 33 with receiver 34, and this memory 32 is for storing instruction, and the instruction that this processor 31 stores for performing this memory 32, to control receiver 34 Received signal strength.Wherein, this receiver 34 for: receive subscriber equipment send pre-coding matrix instruction PMI, this PMI comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI; This processor 31 for: according to the value of a PMI and the value of the 2nd PMI, determine the value of the first code book index and the value of the second code book index, this first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and this first codebook set is the subset of this second codebook set; This processor 31 also for: according to the value of this first code book index and the value of this second code book index, in this second codebook set, determine this first pre-coding matrix; Wherein, the value of the one PMI and the value of this first code book index have the first corresponding relation, the value of the 2nd PMI and the value of this second code book index have the second corresponding relation, and the span of the span of a PMI this first code book index corresponding this second code book index corresponding to the value of the 2nd PMI has incidence relation.
Therefore, the base station of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
Alternatively, as an embodiment, the span of the 2nd PMI this second code book index corresponding is uniquely determined by the value of a PMI this first code book index corresponding and/or span.
Alternatively, as an embodiment, the span of the one PMI this first code book index corresponding comprises element mutually different at least two the first value set, the span of the 2nd PMI this second code book index corresponding comprises element mutually different at least two the second value set, and these at least two the first value set and these at least two the second value set have one-to-one relationship.
Alternatively, as an embodiment, each first value set in these at least two the first value set comprises at least two values, and each second value set in these at least two the second value set comprises at least two values.
Alternatively, as an embodiment, the quantity of the value that the span of the 2nd PMI this second code book index corresponding comprises is greater than 2 n, wherein N is the bit number of the value of carrying the 2nd PMI.
Alternatively, as an embodiment, this first codebook set comprises eight discrete Fourier transform DFT vectors; Or the quantity of DFT vector that comprises of this first codebook set is the half of the quantity of the pre-coding matrix that this first codebook set comprises.
Alternatively, as an embodiment, the value of a PMI, the 2nd PMI, this first code book index corresponding to a PMI and this second code book index corresponding with the 2nd PMI is determined by Table A 1.
Alternatively, as an embodiment, the pre-coding matrix W that this second codebook set comprises is determined by Table A 2.
Alternatively, as an embodiment, the pre-coding matrix that this first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of this first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
Alternatively, as an embodiment, this PMI that this receiver 34 sends specifically for receiving this subscriber equipment on a up channel.
Should understand, may correspond in performing the base station according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the base station 30 of the embodiment of the present invention, and base station 800, and above-mentioned and other operation of the modules in base station 30 and/or function are in order to realize the corresponding flow process of the method in Fig. 3, for simplicity, do not repeat them here.
Therefore, the base station of the embodiment of the present invention, by the span of the span of corresponding first code book index of a PMI second code book index corresponding to the 2nd PMI, there is incidence relation, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus can systematic function be improved, and strengthen Consumer's Experience.
As shown in figure 12, the embodiment of the present invention additionally provides a kind of base station 40, and this base station 40 comprises processor 41, memory 42, bus system 43 and receiver 44.Wherein, processor 41, memory 42 are connected by bus system 43 with receiver 44, and this memory 42 is for storing instruction, and the instruction that this processor 41 stores for performing this memory 42, to control receiver 44 Received signal strength.Wherein, this receiver 44 for: receive pre-coding matrix instruction PMI, this PMI that subscriber equipment sends and comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set; This processor 41 for: according to this combined coding value, determine the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, wherein, the order of this combined coding value and this first pre-coding matrix has the first corresponding relation, the value of the first code book index of this combined coding value and this first pre-coding matrix has the second corresponding relation, and the bit number carrying this combined coding value is 4 or 5; This processor 41 also for: according to the value of the first code book index of this first pre-coding matrix of sum of ranks of this first pre-coding matrix, in the second codebook set being applied to four antennas, determine this first pre-coding matrix, this first codebook set is the subset of this second codebook set.
Alternatively, as an embodiment, when to carry the bit number of this combined coding value be 4, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix by lower list B1, show B2 or show B3 to determine.
Alternatively, as an embodiment, when to carry the bit number of this combined coding value be 5, the corresponding relation of the value of this first code book index of sum of ranks of this combined coding value and this first pre-coding matrix is by lower list B4 or show B5 and determine.
Should understand, may correspond in performing the base station according to the method for the transmitting pre-encoding matrix of the embodiment of the present invention according to the base station 40 of the embodiment of the present invention, and base station 900, and above-mentioned and other operation of the modules in base station 40 and/or function are in order to realize the corresponding flow process of the method in Fig. 4, for simplicity, do not repeat them here.
Therefore, the subscriber equipment of the embodiment of the present invention, can when not changing feedback model and feedback bits, instruction is more applicable to the pre-coding matrix of even linear array antenna, and can ensure not affect the performance being applied to dual polarized antenna, thus systematic function can be improved, and strengthen Consumer's Experience.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, 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.Professional and technical personnel 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.
Those skilled in the art can be well understood to, and for convenience of description and succinctly, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.In addition, shown or discussed coupling each other or direct-coupling or communication connection can be indirect coupling by some interfaces, device or unit or communication connection, also can be electric, machinery or other form connect.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of embodiment of the present invention scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, and also can be that the independent physics of unit exists, also can be that two or more unit are in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is in essence in other words to the part that prior art contributes, or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; can expect amendment or the replacement of various equivalence easily, these amendments or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (52)

1. a method for transmitting pre-encoding matrix, is characterized in that, comprising:
In the first codebook set, determine the first pre-coding matrix, described first codebook set is the subset of the second codebook set, and the pre-coding matrix that described second codebook set comprises is indicated by the first code book index and the second code book index;
Determine the first pre-coding matrix instruction value of PMI and the value of the 2nd PMI indicating described first pre-coding matrix;
Send PMI, described PMI to base station and comprise the value of the described PMI being used to indicate described first pre-coding matrix and the value of described 2nd PMI, so that described pre-coding matrix is determined according to described PMI in described base station;
Wherein, the value of a described PMI and the value of described first code book index have the first corresponding relation, the value of described 2nd PMI and the value of described second code book index have the second corresponding relation, and the span of the span of a described PMI described first code book index accordingly described second code book index corresponding to described 2nd PMI has incidence relation.
2. method according to claim 1, is characterized in that, the span of described second code book index that the span of a described PMI described first code book index is accordingly corresponding to described 2nd PMI has incidence relation, comprising:
The span of described 2nd PMI described second code book index accordingly by a described PMI, uniquely determine accordingly by the value of described first code book index and/or span.
3. method according to claim 1, is characterized in that, the span of described second code book index that the span of a described PMI described first code book index is accordingly corresponding to described 2nd PMI has incidence relation, comprising:
The span of a described PMI described first code book index accordingly comprises element mutually different at least two the first value set, the span of described 2nd PMI described second code book index accordingly comprises element mutually different at least two the second value set, and described at least two the first value set and described at least two the second value set have one-to-one relationship.
4. method according to claim 3, it is characterized in that, each first value set in described at least two the first value set comprises at least two values, and each second value set in described at least two the second value set comprises at least two values.
5. method according to claim 1, is characterized in that, the quantity of the value that the span of described 2nd PMI described second code book index accordingly comprises is greater than 2 n, wherein N is the bit number of the value carrying described 2nd PMI.
6. method according to claim 1, is characterized in that, described first codebook set comprises eight discrete Fourier transform DFT vectors; Or
The quantity of the DFT vector that described first codebook set comprises is the half of the quantity of the pre-coding matrix that described first codebook set comprises.
7. method according to any one of claim 1 to 6, it is characterized in that, the value of a described PMI, described 2nd PMI, described first code book index corresponding to a described PMI and described second code book index corresponding with described 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2 0 0 0 0 0 0 1 2 1 2 0 1 1 2 1 3 2 4 0 0 2 4 1 2 3 6 0 1 3 6 1 3 4 8 0 0 4 8 1 2 5 10 0 1 5 10 1 3 6 12 0 0 6 12 1 2 7 14 0 1 7 14 1 3
Wherein, I pMI1represent a described PMI; I pMI2represent described 2nd PMI; i 1represent described first code book index; i 2represent described second code book index i 2.
8. method according to claim 7, is characterized in that, the pre-coding matrix W that described second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
9. method according to any one of claim 1 to 6, is characterized in that, the pre-coding matrix that described first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of described first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
10. method according to any one of claim 1 to 6, is characterized in that, described to base station transmission PMI, comprising:
A up channel sends described PMI to described base station.
The method of 11. 1 kinds of transmitting pre-encoding matrixes, is characterized in that, comprising:
In the first codebook set, determine the first pre-coding matrix, described first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that described second codebook set comprises is indicated by the first code book index and the second code book index;
Determine the combined coding value indicating described first pre-coding matrix, wherein, the order of described combined coding value and described first pre-coding matrix has the first corresponding relation, the value of the first code book index of described combined coding value and described first pre-coding matrix has the second corresponding relation, and the bit number carrying described combined coding value is 4 or 5;
The pre-coding matrix instruction PMI comprising described combined coding value is sent, so that described first pre-coding matrix is determined according to described PMI in described base station to base station.
12. methods according to claim 11, it is characterized in that, when to carry the bit number of described combined coding value be 4, the corresponding relation of the value of the first code book index described in the sum of ranks of described combined coding value and described first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Table B3
I RI/PMI1 RI i 1 0-6 1 2I RI/PMI1 7-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
13. methods according to claim 11 or 12, it is characterized in that, when to carry the bit number of described combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of described combined coding value and described first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1 0-15 1 I RI/PMI1 16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8） 16 3 0
17 4 0 18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
The method of 14. 1 kinds of transmitting pre-encoding matrixes, is characterized in that, comprising:
The pre-coding matrix instruction PMI, the described PMI that receive subscriber equipment transmission comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI;
According to the value of a described PMI and the value of described 2nd PMI, determine the value of the first code book index and the value of the second code book index, described first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and described first codebook set is the subset of described second codebook set;
According to the value of described first code book index and the value of described second code book index, in described second codebook set, determine described first pre-coding matrix;
Wherein, the value of a described PMI and the value of described first code book index have the first corresponding relation, the value of described 2nd PMI and the value of described second code book index have the second corresponding relation, and the span of the span of a described PMI described first code book index accordingly described second code book index corresponding to the value of described 2nd PMI has incidence relation.
15. methods according to claim 14, is characterized in that, the span of described second code book index that the span of a described PMI described first code book index is accordingly corresponding to described 2nd PMI has incidence relation, comprising:
The span of described 2nd PMI described second code book index accordingly by a described PMI, uniquely determine accordingly by the value of described first code book index and/or span.
16. methods according to claim 14, is characterized in that, the span of described second code book index that the span of a described PMI described first code book index is accordingly corresponding to described 2nd PMI has incidence relation, comprising:
The span of a described PMI described first code book index accordingly comprises element mutually different at least two the first value set, the span of described 2nd PMI described second code book index accordingly comprises element mutually different at least two the second value set, and described at least two the first value set and described at least two the second value set have one-to-one relationship.
17. methods according to claim 16, it is characterized in that, each first value set in described at least two the first value set comprises at least two values, and each second value set in described at least two the second value set comprises at least two values.
18. methods according to claim 14, is characterized in that, the quantity of the value that the span of described 2nd PMI described second code book index accordingly comprises is greater than 2 n, wherein N is the bit number of the value carrying described 2nd PMI.
19. methods according to claim 14, is characterized in that, described first codebook set comprises eight discrete Fourier transform DFT vectors; Or
The quantity of the DFT vector that described first codebook set comprises is the half of the quantity of the pre-coding matrix that described first codebook set comprises.
20. according to claim 14 to the method according to any one of 19, it is characterized in that, the value of a described PMI, described 2nd PMI, described first code book index corresponding to a described PMI and described second code book index corresponding with described 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2 0 0 0 0 0 0 1 2 1 2 0 1 1 2 1 3 2 4 0 0 2 4 1 2 3 6 0 1 3 6 1 3 4 8 0 0 4 8 1 2 5 10 0 1 5 10 1 3 6 12 0 0 6 12 1 2 7 14 0 1 7 14 1 3
Wherein, I pMI1represent a described PMI; I pMI2represent described 2nd PMI; i 1represent described first code book index; i 2represent described second code book index i 2.
21. methods according to claim 20, is characterized in that, the pre-coding matrix W that described second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
22., according to claim 14 to the method according to any one of 19, is characterized in that, the pre-coding matrix that described first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of described first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
23., according to claim 14 to the method according to any one of 19, is characterized in that, the pre-coding matrix instruction PMI that described reception subscriber equipment sends, comprising:
A up channel receives the described PMI that described subscriber equipment sends.
The method of 24. 1 kinds of transmitting pre-encoding matrixes, is characterized in that, comprising:
The pre-coding matrix instruction PMI, the described PMI that receive subscriber equipment transmission comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set;
According to described combined coding value, the value of the first code book index of the first pre-coding matrix described in the sum of ranks determining described first pre-coding matrix, wherein, the order of described combined coding value and described first pre-coding matrix has the first corresponding relation, the value of the first code book index of described combined coding value and described first pre-coding matrix has the second corresponding relation, and the bit number carrying described combined coding value is 4 or 5;
The value of the first code book index of the first pre-coding matrix according to the sum of ranks of described first pre-coding matrix, in the second codebook set being applied to four antennas, determine described first pre-coding matrix, described first codebook set is the subset of described second codebook set.
25. methods according to claim 24, it is characterized in that, when to carry the bit number of described combined coding value be 4, the corresponding relation of the value of the first code book index described in the sum of ranks of described combined coding value and described first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1
0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Table B3
I RI/PMI1 RI i 1 0-6 1 2I RI/PMI1 7-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
26. methods according to claim 24 or 25, it is characterized in that, when to carry the bit number of described combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of described combined coding value and described first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1 0-15 1 I RI/PMI1 16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8）
16 3 0 17 4 0 18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
27. 1 kinds of subscriber equipmenies, is characterized in that, comprising:
First determination module, for determining the first pre-coding matrix in the first codebook set, described first codebook set is the subset of the second codebook set, and the pre-coding matrix that described second codebook set comprises is indicated by the first code book index and the second code book index;
Second determination module, for determining the first pre-coding matrix instruction value of PMI and value of the 2nd PMI of described first pre-coding matrix indicating described first determination module to determine;
Sending module, for sending PMI to base station, what described PMI comprised that described second determination module determines is used to indicate the value of a described PMI of described first pre-coding matrix and the value of described 2nd PMI, so that described pre-coding matrix is determined according to described PMI in described base station;
Wherein, the value of a described PMI and the value of described first code book index have the first corresponding relation, the value of described 2nd PMI and the value of described second code book index have the second corresponding relation, and the span of the span of a described PMI described first code book index accordingly described second code book index corresponding to described 2nd PMI has incidence relation.
28. subscriber equipmenies according to claim 27, is characterized in that, the span of described 2nd PMI described second code book index accordingly by a described PMI, uniquely determine accordingly by the value of described first code book index and/or span.
29. subscriber equipmenies according to claim 27, it is characterized in that, the span of a described PMI described first code book index accordingly comprises element mutually different at least two the first value set, the span of described 2nd PMI described second code book index accordingly comprises element mutually different at least two the second value set, and described at least two the first value set and described at least two the second value set have one-to-one relationship.
30. subscriber equipmenies according to claim 29, it is characterized in that, each first value set in described at least two the first value set comprises at least two values, and each second value set in described at least two the second value set comprises at least two values.
31. subscriber equipmenies according to claim 27, is characterized in that, the quantity of the value that the span of described 2nd PMI described second code book index accordingly comprises is greater than 2 n, wherein N is the bit number of the value carrying described 2nd PMI.
32. subscriber equipmenies according to claim 27, is characterized in that, described first codebook set comprises eight discrete Fourier transform DFT vectors; Or
The quantity of the DFT vector that described first codebook set comprises is the half of the quantity of the pre-coding matrix that described first codebook set comprises.
33. subscriber equipmenies according to any one of claim 27 to 32, it is characterized in that, the value of a described PMI, described 2nd PMI, described first code book index corresponding to a described PMI and described second code book index corresponding with described 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2 0 0 0 0 0 0 1 2 1 2 0 1 1 2 1 3 2 4 0 0 2 4 1 2 3 6 0 1 3 6 1 3 4 8 0 0 4 8 1 2 5 10 0 1 5 10 1 3 6 12 0 0 6 12 1 2 7 14 0 1 7 14 1 3
Wherein, I pMI1represent a described PMI; I pMI2represent described 2nd PMI; i 1represent described first code book index; i 2represent described second code book index i 2.
34. subscriber equipmenies according to claim 33, is characterized in that, the pre-coding matrix W that described second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
35. subscriber equipmenies according to any one of claim 27 to 32, it is characterized in that, the pre-coding matrix that described first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of described first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
36. subscriber equipmenies according to any one of claim 27 to 32, is characterized in that, described sending module specifically for: on a up channel, send described PMI to described base station.
37. 1 kinds of subscriber equipmenies, is characterized in that, comprising:
First determination module, for determining the first pre-coding matrix in the first codebook set, described first codebook set is the subset of the second codebook set being applied to four antennas, and the pre-coding matrix that described second codebook set comprises is indicated by the first code book index and the second code book index;
Second determination module, for determining the combined coding value of described first pre-coding matrix indicating described first determination module to determine, wherein, the order of described combined coding value and described first pre-coding matrix has the first corresponding relation, the value of the first code book index of described combined coding value and described first pre-coding matrix has the second corresponding relation, and the bit number carrying described combined coding value is 4 or 5;
Sending module, for comprising the described combined coding value that described second determination module is determined to the instruction of base station transmission pre-coding matrix PMI, described PMI, so that described first pre-coding matrix is determined according to described PMI in described base station.
38. according to subscriber equipment according to claim 37, it is characterized in that, when to carry the bit number of described combined coding value be 4, the corresponding relation of the value of the first code book index described in the sum of ranks of described combined coding value and described first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Table B3
I RI/PMI1 RI i 1 0-6 1 2I RI/PMI1 7-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
39. subscriber equipmenies according to claim 37 or 38, it is characterized in that, when to carry the bit number of described combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of described combined coding value and described first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1 0-15 1 I RI/PMI1 16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8） 16 3 0 17 4 0
18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
40. 1 kinds of base stations, is characterized in that, comprising:
Receiver module, the pre-coding matrix instruction PMI, the described PMI that send for receiving subscriber equipment comprise the value of a PMI of the first pre-coding matrix be used to indicate in the first codebook set and the value of the 2nd PMI;
First determination module, for the value of a described PMI that receives according to described receiver module and the value of described 2nd PMI, determine the value of the first code book index and the value of the second code book index, described first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, and described first codebook set is the subset of described second codebook set;
Second determination module, for the value of described first code book index determined according to described first determination module and the value of described second code book index, determines described first pre-coding matrix in described second codebook set;
Wherein, the value of a described PMI and the value of described first code book index have the first corresponding relation, the value of described 2nd PMI and the value of described second code book index have the second corresponding relation, and the span of the span of a described PMI described first code book index accordingly described second code book index corresponding to the value of described 2nd PMI has incidence relation.
41. base stations according to claim 40, is characterized in that, the span of described 2nd PMI described second code book index accordingly by a described PMI, uniquely determine accordingly by the value of described first code book index and/or span.
42. base stations according to claim 40, it is characterized in that, the span of a described PMI described first code book index accordingly comprises element mutually different at least two the first value set, the span of described 2nd PMI described second code book index accordingly comprises element mutually different at least two the second value set, and described at least two the first value set and described at least two the second value set have one-to-one relationship.
43. base stations according to claim 42, it is characterized in that, each first value set in described at least two the first value set comprises at least two values, and each second value set in described at least two the second value set comprises at least two values.
44. base stations according to claim 40, is characterized in that, the quantity of the value that the span of described 2nd PMI described second code book index accordingly comprises is greater than 2 n, wherein N is the bit number of the value carrying described 2nd PMI.
45. base stations according to claim 40, is characterized in that, described first codebook set comprises eight discrete Fourier transform DFT vectors; Or
The quantity of the DFT vector that described first codebook set comprises is the half of the quantity of the pre-coding matrix that described first codebook set comprises.
46. base stations according to any one of claim 40 to 45, it is characterized in that, the value of a described PMI, described 2nd PMI, described first code book index corresponding to a described PMI and described second code book index corresponding with described 2nd PMI is determined by Table A 1:
Table A 1
I PMI1 i 1=2I PMI1 I PMI2 i 2 0 0 0 0 0 0 1 2 1 2 0 1 1 2 1 3 2 4 0 0 2 4 1 2 3 6 0 1 3 6 1 3 4 8 0 0 4 8 1 2 5 10 0 1 5 10 1 3 6 12 0 0 6 12 1 2 7 14 0 1 7 14 1 3
Wherein, I pMI1represent a described PMI; I pMI2represent described 2nd PMI; i 1represent described first code book index; i 2represent described second code book index i 2.
47. base stations according to claim 46, is characterized in that, the pre-coding matrix W that described second codebook set comprises is determined by Table A 2:
Table A 2
Wherein, v m=[1 e j2 π m/32] t, m and n is nonnegative integer.
48. base stations according to any one of claim 40 to 45, it is characterized in that, the pre-coding matrix that described first codebook set comprises is the pre-coding matrix being applied to four antennas; Or the pre-coding matrix that comprises of described first codebook set is be applied to four antennas and order is the pre-coding matrix of 1.
49. base stations according to any one of claim 40 to 45, is characterized in that, described receiver module specifically for: on a up channel, receive the described PMI that described subscriber equipment sends.
50. 1 kinds of base stations, is characterized in that, comprising:
Receiver module, the pre-coding matrix instruction PMI, the described PMI that send for receiving subscriber equipment comprise the combined coding value of the first pre-coding matrix be used to indicate in the first codebook set;
First determination module, for the described combined coding value received according to described receiver module, the value of the first code book index of the first pre-coding matrix described in the sum of ranks determining described first pre-coding matrix, wherein, the order of described combined coding value and described first pre-coding matrix has the first corresponding relation, the value of the first code book index of described combined coding value and described first pre-coding matrix has the second corresponding relation, and the bit number carrying described combined coding value is 4 or 5;
Second determination module, for the value of the first code book index of the first pre-coding matrix described in the sum of ranks of described first pre-coding matrix determined according to described first determination module, in the second codebook set being applied to four antennas, determine described first pre-coding matrix, described first codebook set is the subset of described second codebook set.
51. base stations according to claim 50, it is characterized in that, when to carry the bit number of described combined coding value be 4, the corresponding relation of the value of the first code book index described in the sum of ranks of described combined coding value and described first pre-coding matrix by lower list B1, show B2 or show B3 to determine:
Table B1
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1
8-15 2 2（I RI/PMI1-8）
Table B2
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Table B3
I RI/PMI1 RI i 1 0-6 1 2I RI/PMI1 7-13 2 2（I RI/PMI1-8） 14 3 0 15 4 0
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
52. base stations according to claim 51 or 52, it is characterized in that, when to carry the bit number of described combined coding value be 5, the corresponding relation of the value of sum of ranks first code book index of described combined coding value and described first pre-coding matrix is by lower list B4 or show B5 and determine:
Table B4
I RI/PMI1 RI i 1 0-15 1 I RI/PMI1 16-31 2 I RI/PMI1-16
Table B5
I RI/PMI1 RI i 1 0-7 1 2I RI/PMI1 8-15 2 2（I RI/PMI1-8） 16 3 0
17 4 0 18-31 Retain Empty
Wherein, I rI/PMI1represent combined coding value; RI presentation code rank of matrix; i 1represent the first code book index.
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