CN104321983B

CN104321983B - Method, user equipment and the base station of transmitting pre-encoding matrix

Info

Publication number: CN104321983B
Application number: CN201380001909.2A
Authority: CN
Inventors: 吴强; 张雷鸣; 周永行; 刘江华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2018-06-05
Anticipated expiration: 2033-05-17
Also published as: CN104321983A

Abstract

The invention discloses a kind of method of transmitting pre-encoding matrix, user equipment and base stations.This method includes：The first pre-coding matrix is determined in the first codebook set, which is the subset of the second codebook set, and the pre-coding matrix which includes is indicated by the first code book index and the second code book index；It determines to be used to indicate the value of the first pre-coding matrix instruction PMI of first pre-coding matrix and the value of the 2nd PMI；PMI is sent to base station, which includes being used to indicate the value of the first PMI of first pre-coding matrix and the value of the 2nd PMI, in order to which the base station determines the pre-coding matrix according to the PMI.Method, user equipment and the base station of the transmitting pre-encoding matrix of the embodiment of the present invention, it can be in the case where not changing feedback model and feedback bits, it indicates more suitable for the pre-coding matrix of even linear array antenna, and it can ensure not influence the performance applied to dual polarized antenna, so as to improve system performance, and enhance user experience.

Description

Method, user equipment and the base station of transmitting pre-encoding matrix

Technical field

The present invention relates to the method for transmitting pre-encoding matrix in the communications field more particularly to the communications field, user equipment and Base station.

Background technology

Multiple-input, multiple-output（Multiple Input Multiple Output, referred to as " MIMO "）Wireless system passes through transmitting Wave beam forming（BeamForming, referred to as " BF "）/ precoding and reception merge, and can obtain diversity and array gain.Profit It usually can be by following equalities with BF or the canonical system received signal vector of precoding（1）It represents：

y=HVs+n （1）

Wherein, y represents received signal vector, and H represents channel matrix, and V represents pre-coding matrix, and s represents the symbol of transmitting Number vector, n represent measurement noise.

Optimal precoding usually requires the completely known channel state information of transmitter（Channel State Information, referred to as " CSI "）.Common method is user equipment（User Equipment, referred to as " UE "）To wink When CSI quantified, and feed back to evolution base station（Evolved NodeB, referred to as " eNB "）.In existing Long Term Evolution （Long Term Evolution, referred to as " LTE "）8th version of system（R8）In, the CSI information of UE feedbacks can include Order instruction（Rank Indicator, referred to as " RI "）, pre-coding matrix instruction（Precoding Matrix Indicator, Referred to as " PMI "）It is indicated with channel quality（Channel Quality Indicator, referred to as " CQI "）Information etc., wherein RI and PMI indicates respectively the number of plies used and pre-coding matrix.The code book of LTE R8 is mainly Single User MIMO（Single User MIMO, referred to as " SU-MIMO "）Designed, pre-coding matrix therein or code word need to meet 8 phase-shift keyings （8Phase Shift Keying, referred to as " 8PSK "）Constraint, so as to limit the precision of space quantization, this causes for more User MIMO（Multiple User MIMO, referred to as " MU-MIMO "）For the transmission mode for waiting space quantizations precision sensitivity, Performance will be severely limited.

In order to reach higher system requirements, third generation partner program（3rd Generation Partnership Project, referred to as " 3GPP "）LTE system needs to further enhance the performance of MU-MIMO, while the system also introduces association Make multicast communication（Coordinated Multi-Point, referred to as " CoMP "）Technology.CoMP technologies are fed back with single cell at present Based on, thus above two technology all proposes feedback performance higher requirement.Since feedback channel capacity is limited, code This set sizes is also therefore limited, this proposes higher requirement for the design of code book.

3GPP LTE R8 systems use single code book, and pre-coding matrix is indicated by RI and PMI.For 4 antennas For, RI and PMI and the correspondence of each code word in code book are as shown in table 1 below：

Table 1

Wherein,It represents by matrixRow set { s } form matrix, I be 4 × 4 list Position battle array, u_nIt is provided by upper table 1.

In the code book of R8, for order（Rank）For 1 pre-coding matrix, the pre-coding matrix indexed as 0-7 is discrete Fourier transformation（Discrete Fourier Transform, referred to as " DFT "）Vector, DFT vectors are suitable for uniform line Battle array（Uniform Linear Array, referred to as " ULA "）Antenna.DFT vectors refer to the pre-coding matrix of T X 1, the DFT vector vs Usually there is such as equation（2）Shown form：

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, i.e. N is 2 x power sides, and the t of the DFT vector vs A element is e^j2π(t-1)m/N（T=1,2 ..., T）.

In the tenth version of 3GPP LTE systems（R10）In, the code book that 8 antennas use is by two groups of DFT vector vs_mComposition, this There are phase differences between two groups of DFT vectorsWherein DFT vector vs_mAnd phase differenceBy following equalities（3）It represents：

The codebook structure of 8 antennas is shown below, which designs according to dual polarized antenna, wherein, table 2 It is 1 to show order（It is 1 layer to transmit the number of plies）8 antenna codebooks；Table 3 shows that order is 2（It is 2 layers to transmit the number of plies）8 days Line code sheet；Table 4 shows that order is 3（It is 3 layers to transmit the number of plies）8 antenna codebooks；Table 5 shows that order is 4（Transmitting the number of plies is 4 layers）8 antenna codebooks.

Table 2

Table 3

Table 4

Table 5

Codebook structure designing scheme based on 8 antennas by being appropriately modified to DFT vector vs, can obtain order as 1 With 24 antenna codebooks.But for 4 antenna codebooks that order is 3 and 4, since the codebook structure designing scheme based on 8 antennas cannot Ensure the orthogonality respectively arranged of pre-coding matrix, thus cannot be obtained based on 8 antenna codebooks of 3GPP LTE R10 systems.

The index of the pre-coding matrix of 8 antennas can be by the first code book index i₁With the second code book index i₂It represents, for order For 18 antenna codebooks, the first code book index i₁With the second code book index i₂4 bits is required for represent.In order to save The expense of feedback resources, PMI can represent that this just needs to carry out down-sampling to PMI or 8 antenna codebooks with 4 bits （subsampling）, wherein, the physical uplink control channel of 8 antennas（Physical Uplink Control Channel, referred to as " PUCCH "）The 2 down-sampling code book of subpattern of pattern 1-1 is as shown in table 6.

Table 6

Enhance code book for 4 antennas, in order to while strengthening system performance, not increase the complexity of codebook design and feedback Property can continue to use the codebook structure designing scheme of 8 antennas, and the index of pre-coding matrix can also be by the first code book index i₁ With the second code book index i₂It represents.In order to save the expense of feedback resources, PMI can also be represented with 4 bits, this It needs to carry out down-sampling to PMI or 4 antenna codebooks（subsampling）.

However, for enhancing code book based on 4 antennas of 8 antenna codebook structures, pattern is the son of PUCCH patterns 1-1 During pattern 2, after continuing to use 8 antenna down-sampling code books progress code book down-sampling as shown in table 6, when order is 1, pre-coding matrix is only There are 4 DFT vectors, and 4 antenna codebooks of R8 systems have 8 DFT vectors.Thus, when the antenna of configuration is even linear array ULA days During line, 4 antennas enhance code book in the subpattern 2 of PUCCH patterns 1-1, and R8 systems are less than suitable for the pre-coding matrix of ULA antennas The pre-coding matrix of system, performance loss are serious.

The content of the invention

An embodiment of the present invention provides a kind of method of transmitting pre-encoding matrix, user equipment and base stations, can not change In the case of becoming feedback model and feedback bits, instruction is more suitable for the pre-coding matrix of even linear array antenna.

In a first aspect, providing a kind of method of transmitting pre-encoding matrix, this method includes：In the first codebook set really Fixed first pre-coding matrix, first codebook set are the subset of the second codebook set, and what which included prelists Code matrix is indicated by the first code book index and the second code book index；Determine that be used to indicate first pre-coding matrix first prelists The value of code matrix instruction PMI and the value of the 2nd PMI；PMI is sent to base station, which includes being used to indicate the first precoding square The value of first PMI of battle array and the value of the 2nd PMI, in order to which the base station determines the pre-coding matrix according to the PMI；Wherein, The value of first PMI has the first correspondence, the value of the 2nd PMI and the second code book rope with the value of first code book index The value drawn has the second correspondence, and the value range and the 2nd PMI of corresponding first code book indexes of the first PMI The value range of corresponding second code book index has incidence relation.

With reference to first aspect, in the first possible realization method of first aspect, the first PMI it is corresponding this first The value range of the value range of code book index second code book index corresponding with the 2nd PMI has incidence relation, including： The value range of corresponding second code book indexes of 2nd PMI by corresponding first code book indexes of the first PMI value And/or value range uniquely determines.

With reference to first aspect, in second of possible realization method of first aspect, the first PMI it is corresponding this first The value range of the value range of code book index second code book index corresponding with the 2nd PMI has incidence relation, including： The value range of corresponding first code book indexes of first PMI includes the mutually different at least two first value collection of element It closes, the value range of corresponding second code book indexes of the 2nd PMI includes mutually different at least two second value of element Set, at least two first value set have one-to-one relationship at least two second value set.

Second of possible realization method with reference to first aspect, in the third possible realization method of first aspect In, each first value set in at least two first value set includes at least two values, this at least two second Each second value set in value set includes at least two values.

With reference to first aspect, in the 4th kind of possible realization method of first aspect, the 2nd PMI it is corresponding this second The quantity for the value that the value range of code book index includes is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

With reference to first aspect, in the 5th kind of possible realization method of first aspect, which includes eight A discrete Fourier transform DFT vectors；Or the quantity of DFT vectors that first codebook set includes is the first codebook set bag The half of the quantity of the pre-coding matrix included.

With reference to first aspect or first aspect the first is possible to any one of the 5th kind of possible realization method Realization method, in the 6th kind of possible realization method of first aspect, the first PMI, the 2nd PMI, with the first PMI phases First code book index and the value of second code book index corresponding with the 2nd PMI answered are determined by Table A 1：

Table A 1

I_PMI1	i₁=2I_PMI1	I_PMI2	i₂
				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 the first PMI；I_PMI2Represent the 2nd PMI；i₁Represent first code book index；i₂Representing should Second code book index i₂。

The 6th kind of possible realization method with reference to first aspect, in the 7th kind of possible realization method of first aspect In, the pre-coding matrix W which includes is determined by Table A 2：

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

With reference to first aspect or first aspect the first is possible to any one of the 5th kind of possible realization method Realization method, in the 8th kind of possible realization method of first aspect, the pre-coding matrix which includes is Pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is to be applied to four antennas and order 1 pre-coding matrix.

With reference to first aspect or first aspect the first is possible to any one of the 5th kind of possible realization method Realization method, in the 9th kind of possible realization method of first aspect, this sends PMI to base station, including：Believe in a uplink On road the PMI is sent to the base station.

Second aspect, provides a kind of method of transmitting pre-encoding matrix, and this method includes：In the first codebook set really Fixed first pre-coding matrix, first codebook set are the subset of the second codebook set applied to four antennas, second code book The pre-coding matrix that gathering includes is indicated by the first code book index and the second code book index；It determines to be used to indicate first precoding The combined coding value of matrix, wherein, the combined coding value and the order of first pre-coding matrix have the first correspondence, the connection The value for compiling in collaboration with code value and the first code book index of first pre-coding matrix has the second correspondence, and carries joint volume The bit number of code value is 4 or 5；Being sent to base station includes the pre-coding matrix instruction PMI of the combined coding value, in order to this Base station determines first pre-coding matrix according to the PMI.

With reference to second aspect, in the first possible realization method of second aspect, the combined coding value is being carried When bit number is 4, the corresponding pass of the value of the combined coding value with the sum of ranks of first pre-coding matrix first code book index System is determined by following table B1, table B2 or table B3：

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			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 ranks of matrix；i₁Represent the first code book index.

With reference to the possible realization method of the first of second aspect or second aspect, second in second aspect is possible In realization method, when carrying the bit number of the combined coding value and being 5, the combined coding value and first pre-coding matrix The correspondence of the value of the first code book index of sum of ranks is determined by following table B4 or table B5：

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1

16-31

2

I_RI/PMI1-16

Table B5

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）
			16	3	0
17	4	0
			18-31	Retain	It is empty

7th aspect, provides a kind of method of transmitting pre-encoding matrix, this method includes：Receive what user equipment was sent Pre-coding matrix instruction PMI, the PMI include the first PMI's of the first pre-coding matrix being used to indicate in the first codebook set The value of value and the 2nd PMI；According to the value of the first PMI and the value of the 2nd PMI, the value and second code of the first code book index are determined The value of this index, first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, should First codebook set is the subset of second codebook set；According to the value of first code book index and second code book index Value determines first pre-coding matrix in second codebook set；Wherein, the value of the first PMI and first code book index Value there is the first correspondence, the value of the 2nd PMI and the value of second code book index have the second correspondence, and should The corresponding value ranges of first code book index of first PMI and taking for corresponding second code book index of value of the 2nd PMI Being worth scope has incidence relation.

With reference to the 7th aspect, in the first possible realization method of the 7th aspect, the first PMI it is corresponding this first The value range of the value range of code book index second code book index corresponding with the 2nd PMI has incidence relation, including： The value range of corresponding second code book indexes of 2nd PMI by corresponding first code book indexes of the first PMI value And/or value range uniquely determines.

With reference to the 7th aspect, in second of possible realization method of the 7th aspect, the first PMI it is corresponding this first The value range of the value range of code book index second code book index corresponding with the 2nd PMI has incidence relation, including： The value range of corresponding first code book indexes of first PMI includes the mutually different at least two first value collection of element It closes, the value range of corresponding second code book indexes of the 2nd PMI includes mutually different at least two second value of element Set, at least two first value set have one-to-one relationship at least two second value set.

With reference to second of possible realization method of the 7th aspect, in the third possible realization method of the 7th aspect In, each first value set in at least two first value set includes at least two values, this at least two second Each second value set in value set includes at least two values.

With reference to the 7th aspect, in the 4th kind of possible realization method of the 7th aspect, the 2nd PMI it is corresponding this second The quantity for the value that the value range of code book index includes is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

With reference to the 7th aspect, in the 5th kind of possible realization method of the 7th aspect, which includes eight A discrete Fourier transform DFT vectors；Or the quantity of DFT vectors that first codebook set includes is the first codebook set bag The half of the quantity of the pre-coding matrix included.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 7th aspect or the 7th aspect Realization method, the 7th aspect the 6th kind of possible realization method in, the first PMI, the 2nd PMI, with the first PMI phases First code book index and the value of second code book index corresponding with the 2nd PMI answered are determined by Table A 1：

Table A 1

I_PMI1	i₁=2I_PMI1	I_PMI2	i₂
				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

With reference to the 6th kind of possible realization method of the 7th aspect, in the 7th kind of possible realization method of the 7th aspect In, the pre-coding matrix W which includes is determined by Table A 2：

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 7th aspect or the 7th aspect Realization method, in the 8th kind of possible realization method of the 7th aspect, the pre-coding matrix which includes is Pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is to be applied to four antennas and order 1 pre-coding matrix.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 7th aspect or the 7th aspect Realization method, in the 9th kind of possible realization method of the 7th aspect, the pre-coding matrix which sends refers to Show PMI, including：The PMI that the user's equipment is sent is received on a up channel.

Fourth aspect, provides a kind of method of transmitting pre-encoding matrix, and this method includes：Receive what user equipment was sent Pre-coding matrix instruction PMI, the PMI include the combined coding for the first pre-coding matrix being used to indicate in the first codebook set Value；According to the combined coding value, the first code book index of the sum of ranks of first pre-coding matrix first pre-coding matrix is determined Value, wherein, the order of the combined coding value and first pre-coding matrix has the first correspondence, the combined coding value with should The value of first code book index of the first pre-coding matrix has the second correspondence, and carries the bit number of the combined coding value For 4 or 5；According to the value of the first code book index of the sum of ranks of first pre-coding matrix first pre-coding matrix, should For determining first pre-coding matrix in the second codebook set of four antennas, which is second codebook set Subset.

With reference to fourth aspect, in the first possible realization method of fourth aspect, the combined coding value is being carried When bit number is 4, the corresponding pass of the value of the combined coding value with the sum of ranks of first pre-coding matrix first code book index System is determined by following table B1, table B2 or table B3：

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

With reference to the possible realization method of the first of fourth aspect or fourth aspect, second in fourth aspect is possible In realization method, when carrying the bit number of the combined coding value and being 5, the combined coding value and first pre-coding matrix The correspondence of the value of the first code book index of sum of ranks is determined by following table B4 or table B5：

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

5th aspect, provides a kind of user equipment, the user's equipment includes：First determining module, at first yard In this set determine the first pre-coding matrix, first codebook set be the second codebook set subset, second codebook set Including pre-coding matrix indicated by the first code book index and the second code book index；Second determining module, for determining to refer to Show the value and the 2nd PMI of the first pre-coding matrix instruction PMI of first pre-coding matrix that first determining module determines Value；Sending module, for sending PMI to base station, what which included that second determining module determines, which be used to indicate this, first prelists The value of the first PMI of code matrix and the value of the 2nd PMI, in order to which the base station determines the pre-coding matrix according to the PMI；Its In, the value of the first PMI has the first correspondence, value and the second code of the 2nd PMI with the value of first code book index The value of this index has the second correspondence, and the value range of corresponding first code book indexes of the first PMI with this The value range of corresponding second code book indexes of two PMI has incidence relation.

With reference to the 5th aspect, in the first possible realization method of the 5th aspect, the 2nd PMI it is corresponding this second The value range of code book index is uniquely determined by the value and/or value range of corresponding first code book indexes of the first PMI.

With reference to the 5th aspect, in second of possible realization method of the 5th aspect, the first PMI it is corresponding this first The value range of code book index includes the mutually different at least two first value set of element, the 2nd PMI it is corresponding this The value range of two code book indexes includes the mutually different at least two second value set of element, at least two first value Set has one-to-one relationship at least two second value set.

With reference to second of possible realization method of the 5th aspect, in the third possible realization method of the 5th aspect In, each first value set in at least two first value set includes at least two values, this at least two second Each second value set in value set includes at least two values.

With reference to the 5th aspect, in the 4th kind of possible realization method of the 5th aspect, the 2nd PMI it is corresponding this second The quantity for the value that the value range of code book index includes is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

With reference to the 5th aspect, in the 5th kind of possible realization method of the 5th aspect, which includes eight A discrete Fourier transform DFT vectors；Or the quantity of DFT vectors that first codebook set includes is the first codebook set bag The half of the quantity of the pre-coding matrix included.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 5th aspect or the 5th aspect Realization method, the 5th aspect the 6th kind of possible realization method in, the first PMI, the 2nd PMI, with the first PMI phases First code book index and the value of second code book index corresponding with the 2nd PMI answered are determined by Table A 1：

Table A 1

I_PMI1	i₁=2I_PMI1	I_PMI2	i₂
				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

With reference to the 6th kind of possible realization method of the 5th aspect, in the 7th kind of possible realization method of the 5th aspect In, the pre-coding matrix W which includes is determined by Table A 2：

Table A 2

Wherein,v_m=[ 1e^j2πm/32]^T,M and n is nonnegative integer.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 5th aspect or the 5th aspect Realization method, in the 8th kind of possible realization method of the 5th aspect, the pre-coding matrix which includes is Pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is to be applied to four antennas and order 1 pre-coding matrix.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 5th aspect or the 5th aspect Realization method, in the 9th kind of possible realization method of the 5th aspect, which is specifically used for：In a up channel On to the base station send the PMI.

6th aspect, provides a kind of user equipment, the user's equipment includes：First determining module, at first yard The first pre-coding matrix is determined in this set, which is the subset of the second codebook set applied to four antennas, The pre-coding matrix that second codebook set includes is indicated by the first code book index and the second code book index；Second determining module, For determining to be used to indicate the combined coding value for first pre-coding matrix that first determining module determines, wherein, the joint The order of encoded radio and first pre-coding matrix has the first correspondence, the combined coding value and first pre-coding matrix The value of first code book index has the second correspondence, and the bit number for carrying the combined coding value is 4 or 5；It sends Module, for sending pre-coding matrix instruction PMI to base station, which includes the combined coding that second determining module determines Value, in order to which the base station determines first pre-coding matrix according to the PMI.

With reference to the 6th aspect, in the first possible realization method of the 6th aspect, the combined coding value is being carried When bit number is 4, the corresponding pass of the value of the combined coding value with the sum of ranks of first pre-coding matrix first code book index System is determined by following table B1, table B2 or table B3：

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

With reference to the first possible realization method of the 6th aspect or the 6th aspect, second at the 6th aspect is possible In realization method, when carrying the bit number of the combined coding value and being 5, the combined coding value and first pre-coding matrix The correspondence of the value of the first code book index of sum of ranks is determined by following table B4 or table B5：

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

7th aspect, provides a kind of base station, which includes：Receiving module, for receiving the pre- of user equipment transmission Encoder matrix indicates that PMI, the PMI include the value of the first PMI of the first pre-coding matrix being used to indicate in the first codebook set With the value of the 2nd PMI；First determining module, for the value of the first PMI that is received according to the receiving module and the 2nd PMI Value, determines the value of the first code book index and the value of the second code book index, and first code book index and the second code book index are used to refer to Show the pre-coding matrix in the second codebook set, which is the subset of second codebook set；Second determines mould Block, for the value of first code book index and the value of second code book index determined according to first determining module, this First pre-coding matrix is determined in two codebook sets；Wherein, the value of the value of the first PMI and first code book index has the One correspondence, the value of the 2nd PMI have the second correspondence, and the first PMI phases with the value of second code book index The value range of value range second code book index corresponding with the value of the 2nd PMI for first code book index answered has Incidence relation.

With reference to the 7th aspect, in the first possible realization method of the 7th aspect, the 2nd PMI it is corresponding this second The value range of code book index is uniquely determined by the value and/or value range of corresponding first code book indexes of the first PMI.

With reference to the 7th aspect, in second of possible realization method of the 7th aspect, the first PMI it is corresponding this first The value range of code book index includes the mutually different at least two first value set of element, the 2nd PMI it is corresponding this The value range of two code book indexes includes the mutually different at least two second value set of element, at least two first value Set has one-to-one relationship at least two second value set.

Table A 1

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

It is possible to any one of the 5th kind of possible realization method with reference to the first of the 7th aspect or the 7th aspect Realization method, in the 9th kind of possible realization method of the 7th aspect, which is specifically used for：In a up channel Upper PMI for receiving the user's equipment and sending.

Eighth aspect provides a kind of base station, which includes：Receiving module, for receiving the pre- of user equipment transmission Encoder matrix indicates that PMI, the PMI include the combined coding value for the first pre-coding matrix being used to indicate in the first codebook set； First determining module for the combined coding value received according to the receiving module, determines the sum of ranks of first pre-coding matrix The value of first code book index of first pre-coding matrix, wherein, the combined coding value and the order of first pre-coding matrix have There is the first correspondence, which has the second corresponding pass with the value of the first code book index of first pre-coding matrix System, and the bit number for carrying the combined coding value is 4 or 5；Second determining module, for according to first determining module The value of first code book index of the sum of ranks of definite first pre-coding matrix first pre-coding matrix, applied to four antennas The second codebook set in determine first pre-coding matrix, first codebook set be second codebook set subset.

With reference to eighth aspect, in the first possible realization method of eighth aspect, the combined coding value is being carried When bit number is 4, the corresponding pass of the value of the combined coding value with the sum of ranks of first pre-coding matrix first code book index System is determined by following table B1, table B2 or table B3：

Table B1

I_RI/PMI1

RI

i₁

0-7	1	2I_RI/PMI1
			8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

With reference to the possible realization method of the first of eighth aspect or eighth aspect, second in eighth aspect is possible In realization method, when carrying the bit number of the combined coding value and being 5, the combined coding value and first pre-coding matrix The correspondence of the value of the first code book index of sum of ranks is determined by following table B4 or table B5：

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1

8-15	2	2（I_RI/PMI1-8）
			16	3	0
17	4	0
			18-31	Retain	It is empty

Based on above-mentioned technical proposal, method, user equipment and the base station of the transmitting pre-encoding matrix of the embodiment of the present invention, energy Enough in the case where not changing feedback model and feedback bits, instruction is more suitable for the precoding squares of even linear array antenna Battle array, and can ensure not influence the performance applied to dual polarized antenna, so as to improve system performance, and enhance user's body It tests.

Description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.

Fig. 1 is the schematic flow chart of the method for transmitting pre-encoding matrix according to embodiments of the present invention.

Fig. 2 is another schematic flow chart of the method for transmitting pre-encoding matrix according to embodiments of the present invention.

Fig. 3 is another schematic flow chart of the method for transmitting pre-encoding matrix according to embodiments of the present invention.

Fig. 4 is another schematic flow chart of the method for transmitting pre-encoding matrix according to embodiments of the present invention.

Fig. 5 is the schematic block diagram of user equipment according to embodiments of the present invention.

Fig. 6 is another schematic block diagram of user equipment according to embodiments of the present invention.

Fig. 7 is the schematic block diagram of base station according to embodiments of the present invention.

Fig. 8 is another schematic block diagram of base station according to embodiments of the present invention.

Fig. 9 is another schematic block diagram of user equipment according to embodiments of the present invention.

Figure 10 is another schematic block diagram of user equipment according to embodiments of the present invention.

Figure 11 is another schematic block diagram of base station according to embodiments of the present invention.

Figure 12 is another schematic block diagram of base station according to embodiments of the present invention.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is the part of the embodiment rather than whole embodiments of the present invention.Based on this hair Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of creative work is not made Example is applied, should all belong to the scope of protection of the invention.

It is to be understood that the technical solution of the embodiment of the present invention can be applied to various communication systems, such as：Global system for mobile telecommunications （Global System of Mobile communication, referred to as " GSM "）System, CDMA（Code Division Multiple Access, referred to as " CDMA "）System, wideband code division multiple access（Wideband Code Division Multiple Access, referred to as " WCDMA "）System, General Packet Radio Service（General Packet Radio Service, referred to as " GPRS "）, Long Term Evolution（Long Term Evolution, referred to as " LTE "）System, LTE Frequency division duplex（Frequency Division Duplex, referred to as " FDD "）System, LTE time division duplexs（Time Division Duplex, referred to as " TDD "）, Universal Mobile Communication 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..

It should also be understood that in embodiments of the present invention, user equipment（User Equipment, referred to as " UE "）It can be referred to as Terminal（Terminal）, mobile station（Mobile Station, referred to as " MS "）Or mobile terminal（Mobile Terminal） Deng the user's equipment can be through wireless access network（Radio Access Network, referred to as " RAN "）With one or more cores Heart net communicates, for example, user equipment can be mobile phone（Or it is " honeycomb " phone）Or the meter with mobile terminal Calculation machine etc., for example, user equipment can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile dress It puts, they exchange voice and/or data with wireless access network.

In embodiments of the present invention, base station can be the base station in GSM or CDMA（Base Transceiver Station, referred to as " BTS "）Or the base station in WCDMA（NodeB, referred to as " NB "）, can also be in LTE Evolved base station（Evolutional Node B, referred to as " ENB or e-NodeB "）, it is of the invention not limit, but be description side Just, following embodiments will be illustrated by taking ENB as an example.

Fig. 1 shows the schematic flow chart of the method 100 of transmitting pre-encoding matrix according to embodiments of the present invention, the party Method 100 can for example be performed by user equipment.This method 100 includes：

S110, determines the first pre-coding matrix in the first codebook set, which is the second codebook set Subset, the pre-coding matrix which includes indicates by the first code book index and the second code book index；

S120 determines to be used to indicate the value and the 2nd PMI of the first pre-coding matrix instruction PMI of first pre-coding matrix Value；

S130, to base station send PMI, the PMI include be used to indicate first pre-coding matrix the first PMI value and The value of 2nd PMI, in order to which the base station determines the pre-coding matrix according to the PMI；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the value of the 2nd PMI There is the second correspondence, and the value of corresponding first code book indexes of the first PMI with the value of second code book index The value range of scope second code book index corresponding with the 2nd PMI has incidence relation.

Therefore, the method for the transmitting pre-encoding matrix of the embodiment of the present invention passes through corresponding first code book indexes of the first PMI Value range the second code book index corresponding with the 2nd PMI value range have incidence relation, feedback can not changed In the case of pattern and feedback bits, instruction is more suitable for the pre-coding matrix of even linear array antenna, and can ensure not The performance applied to dual polarized antenna is influenced, so as to improve system performance, and enhances user experience.

Specifically, in S110, user equipment (UE) can for example be based on channel state information（Channel State Information, referred to as " CSI "）, determine that UE it is expected to use when base station eNB sends downlink data in the first codebook set The first pre-coding matrix.First codebook set can be by the first pre-coding matrix instruction PMI I_PMI1And second precoding Matrix instruction PMI I_PMI2Instruction, first codebook set are the subset of the second codebook set, what which included Pre-coding matrix can be by the first code book index i₁With the second code book index i₂Instruction.

In embodiments of the present invention, the first PMI I_PMI1Value and first code book index i₁Value can have first Correspondence, first correspondence can be functional relation or mapping relations, such as i₁=2*I_PMI1；2nd PMI I_PMI2Value and second code book index i₂Value can have the second correspondence, second correspondence can be function close System or mapping relations, for example, the 2nd PMI I_PMI2Value be used to indicate the second code book index i₂Value range in Value sequence number etc..

In embodiments of the present invention, the value range and the 2nd PMI phases of corresponding first code book indexes of the first PMI The value range for second code book index answered has incidence relation.Optionally, corresponding first code book indexes of the first PMI Value range second code book index corresponding with the 2nd PMI value range have incidence relation, including：This second The value range of corresponding second code book indexes of PMI by corresponding first code book indexes of the first PMI value and/or take Value scope uniquely determines.

With the first codebook set prelisting including the first code book index i1 as shown in Table 7 and the second code book index i2 instructions It is illustrated exemplified by code matrix.

Table 7

i₁=2*I_PMI1	i₂（I_PMI2）	DFT vectors
			0 (m=0), I_PMI1=0	0（I_PMI2=0）	It is
0 (m=0), I_PMI1=0	2（I_PMI2=1）	It is no
			2 (m=4), I_PMI1=1	1（I_PMI2=0）	It is
2 (m=4), I_PMI1=1	3（I_PMI2=1）	It is no
			4 (m=8), I_PMI1=2	0（I_PMI2=0）	It is no
4 (m=8), I_PMI1=2	2（I_PMI2=1）	It is
			6 (m=12), I_PMI1=3	1（I_PMI2=0）	It is no
6 (m=12), I_PMI1=3	3（I_PMI2=1）	It is
			8 (m=16), I_PMI1=4	0（I_PMI2=0）	It is
8 (m=16), I_PMI1=4	2（I_PMI2=1）	It is no
			10 (m=20), I_PMI1=5	1（I_PMI2=0）	It is
10 (m=20), I_PMI1=5	3（I_PMI2=1）	It is no
			12 (m=24), I_PMI1=6	0（I_PMI2=0）	It is no
12 (m=24), I_PMI1=6	2（I_PMI2=1）	It is
			14 (m=28), I_PMI1=7	1（I_PMI2=0）	It is no
14 (m=28), I_PMI1=7	3（I_PMI2=1）	It is

As shown in table 7, as the first PMI I_PMI1Value range be（0,2,4,6）When, corresponding first yard of the first PMI This index i₁Value range be（0,4,8,12）, at this point, the 2nd PMI I_PMI2Corresponding second code book index i₂Value Scope is（0,2）；As the first PMI I_PMI1Value range be（1,3,5,7）When, corresponding first code book indexes of the first PMI i₁Value range be（2,6,10,14）, at this point, the 2nd PMI I_PMI2Corresponding second code book index i₂Value range For（1,3）.

Therefore, the value range of corresponding second code book indexes of the 2nd PMI is this first yard corresponding by the first PMI The value and/or value range of this index uniquely determine, i.e. the value ranges of corresponding second code book indexes of the 2nd PMI by The value and/or value range of first PMI uniquely determines.

For example, when the value of the first PMI is 0 or the value of corresponding first code book indexes of the first PMI is 0 When, the value range of corresponding second code book indexes of the 2nd PMI is only（0,2）；In another example taking as the first PMI Value scope is（1,3）When or the value ranges of corresponding first code book indexes of the first PMI be（2,6）When, the 2nd PMI The value range of corresponding second code book index is only（1,3）, i.e., corresponding first code books of the first PMI ought be determined When the value and/or value range of index or when the value and/or value range of the first PMI is determined, determine simultaneously The value range of corresponding second code book indexes of 2nd PMI.

In embodiments of the present invention, optionally, the value range of corresponding first code book indexes of the first PMI with this The value range of corresponding second code book indexes of two PMI has incidence relation, including：First PMI is this first yard corresponding The value range of this index includes the mutually different at least two first value set of element, the 2nd PMI it is corresponding this second The value range of code book index includes the mutually different at least two second value set of element, at least two first value collection Close has one-to-one relationship at least two second value set.

It is to be understood that the quantity of the first value set is equal with the quantity of the second value set.It should also be understood that the first value collection Each element is different in conjunction, and each element is also different in the second value set.

For example, as shown in table 7, the value range of corresponding first code book indexes of the first PMI takes including two first Value set（0,4,8,12）With（2,6,10,14）；The value range of corresponding second code book indexes of 2nd PMI includes two Second value set（0,2）With（1,3）；Wherein, the first value set（0,4,8,12）With the second value set（0,2）It is corresponding, First value set（2,6,10,14）With the second value set（1,3）It is corresponding.

Optionally, each first value set in at least two first value set includes at least two values, should Each second value set at least two second value set includes at least two values.

In embodiments of the present invention, since the value range of corresponding first code book indexes of the first PMI is corresponding to the 2nd PMI The value range of the second code book index there is incidence relation, thus the method for the transmitting pre-encoding matrix of the embodiment of the present invention, It can indicate more to be suitable for the precoding square of even linear array antenna in the case where not changing feedback model and feedback bits Battle array, and can ensure not influence the performance applied to dual polarized antenna, so as to improve system performance, and enhance user's body It tests.

In S120, user equipment can determine to be used to indicate the first code book index i of first pre-coding matrix₁With Two code book index i₂, and the value of value and first code book index that can be based on the first PMI has the first correspondence, this The value of two PMI and the value of second code book index have the second correspondence, determine to be used to indicate first pre-coding matrix The value of first pre-coding matrix instruction PMI and the value of the 2nd PMI.

In embodiments of the present invention, optionally, the first PMI, the 2nd PMI, this first yard corresponding with the first PMI The value of this index and second code book index corresponding with the 2nd PMI is determined by Table A 1：

Table A 1

From Table A 1 as can be seen that working as I_PMI1Value range be（0,2,4,6）When, that is, work as I_PMI1Corresponding i₁Value model Enclose for（0,4,8,12）When, corresponding i₂Value be that scope is（0,2）.Work as I_PMI1Value range be（1,3,5,7）When, that is, work as I_PMI1Corresponding i₁Value range be（2,6,10,14）When, corresponding i₂Value be that scope is（1,3）.That is I_PMI2Corresponding i₂ Value or value range and I_PMI1Corresponding i₁Value or value range be associated.

It is to be understood that I of the embodiment of the present invention shown in only with Table A 1_PMI1、I_PMI2、i₁And i₂Value range exemplified by said It is bright, but the embodiment of the present invention is not limited to this, for example, I_PMI1、I_PMI2、i₁And i₂It can also be other value ranges, equally can So that I_PMI2Corresponding i₂Value or value range and I_PMI1Corresponding i₁Value or value range be associated, it is and corresponding The first codebook set can still include eight DFT vectors.

In embodiments of the present invention, optionally, the pre-coding matrix W which includes is determined by Table A 2：

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

In S130, user equipment is for example on PUCCH channels, Physical Uplink Shared Channel（Physical Uplink Shared Channel, referred to as " PUSCH "）Or send PMI to base station on other channels, the PMI include being used to indicate this The value of first PMI of one pre-coding matrix and the value of the 2nd PMI.

Optionally, user equipment sends the PMI on a up channel to base station.The up channel can be PUCCH Or the channels such as PUSCH.It is transmitted for example, user equipment transmits the PMI or user equipment on a PUCCH on a PUSCH The PMI.It is to be understood that user equipment can also send the first PMI for being used to indicate first pre-coding matrix to base station respectively The value of value and the 2nd PMI, the embodiment of the present invention are not limited to this.

In embodiments of the present invention, optionally, the value range of corresponding second code book indexes of the 2nd PMI includes The quantity of value is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.For example, as shown in table 7, carry this second The bit number of the value of PMI is 1, and the value range of corresponding second code book indexes of the 2nd PMI is（0,2）With（Isosorbide-5-Nitrae）, this The value quantity of two code book indexes is 4, more than 2（I.e. 2¹）.As a result, UE can be indicated with less resource more DFT to Amount.

In embodiments of the present invention, optionally, which includes eight discrete Fourier transform DFT vectors； Or the quantity of DFT vectors that includes of first codebook set include for first codebook set the one of the quantity of pre-coding matrix Half.

For example, as shown in table 7, the first codebook set applied to 4 antennas according to embodiments of the present invention includes 8 DFT Vector, it is identical with the DFT vectors in 3GPP LTE R8 systems, thus system performance when not interfering with applied to ULA antennas, And each pre-coding matrix that first codebook set includes is suitable for dual polarized antenna.

In embodiments of the present invention, optionally, the pre-coding matrix which includes is applied to four antennas Pre-coding matrix；Or the precoding square that it is 1 applied to four antennas and order that the pre-coding matrix that includes of first codebook set, which is, Battle array.

In addition, according to Table A 1 and Table A 2, work as i₁=0 and i₂When=0, work as i₁=2 and i₂When=1, work as i₁=4 and i₂When=2, when i₁=6 and i₂When=3, work as i₁=8 and i₂When=0, work as i₁=10 and i₂When=1, work as i₁=12 and i₂When=2 or work as i₁=1 and i₂It is corresponding when=3 Pre-coding matrix all for DFT vector, i.e., have 8 DFT in 16 pre-coding matrixes after down-sampling in embodiments of the present invention Vector.

In embodiments of the present invention, it can determine that order is 24 antenna codebooks according to table 3, and can reuse shown in table 6 Down-sampling code book.According to the sub-sampling shown in 4 antenna codebook structures and table 6 that order is 2,16 orders are 2 pre-coding matrix Including 32 vectors, and equally include 8 DFT vectors.Thus the embodiment of the present invention can carry out code book down-sampling and not In the case of changing feedback model and feedback bits, instruction is more suitable for the pre-coding matrix of even linear array antenna, and Each pre-coding matrix in codebook set after down-sampling can be suitable for dual polarized antenna, it is thus possible to which guarantee does not influence Applied to the performance of dual polarized antenna, and system performance and enhancing user experience can be improved.

It is to be understood that in embodiments of the present invention, the first codebook set is carried out exemplified by including the pre-coding matrix shown in table 7 Illustrate, the second codebook set is illustrated exemplified by including the pre-coding matrix shown in Table A 2, but the embodiment of the present invention and unlimited In this, the first codebook set and the second codebook set can also have other codebook structures.

It is to be understood that base station（eNB）It can be first to UE configurating channel state information reference signals（Channel State Information Reference Signal, referred to as " CSI-RS "）, specifically, for the N of base station_tRoot antenna or N_tA day Line end mouth, base station configure N to UE_tThe resource of the antenna port of a CSI-RS, wherein N_tFor natural number, such as N_tEqual to 4.UE by This can measure channel quality in corresponding CSI-RS resource, and can determine that UE it is expected to use when eNB sends downlink data RI, PMI, CQI etc..UE determines the channel state informations such as RI, PMI, CQI（Channel State Information, referred to as For " CSI "）Afterwards, can be allocated in eNB on the feedback resources of the UE, by the CSI feedback to base station.For example, base station is matched somebody with somebody to UE The feedback model put is the subpattern 2 of PUCCH patterns 1-1, then UE feeds back RI in the subframe of feedback RI, is feeding back the first PMI I_PMI1, the 2nd PMI I_PMI2I is fed back respectively in the subframe of CQI_PMI1、I_PMI2And CQI.For sake of simplicity, details are not described herein.

It should also be understood that in embodiments of the present invention, pre-coding matrix set is properly termed as code book, in pre-coding matrix set Each pre-coding matrix be properly termed as code word, but the present invention is not limited thereto.

It should also be understood that in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to perform The priority of order, the execution sequence of each process should be determined with its function and internal logic, without the reality of the reply embodiment of the present invention It applies process and forms any restriction.

Fig. 2 shows the schematic flow chart of the method 200 of transmitting pre-encoding matrix according to embodiments of the present invention, the party Method 200 can for example be performed by user equipment.This method 200 includes：

S210, determines the first pre-coding matrix in the first codebook set, which is applied to four antennas The second codebook set subset, the pre-coding matrix which includes is by the first code book index and the second code book rope Draw instruction；

S220 determines to be used to indicate the combined coding value of first pre-coding matrix, wherein, the combined coding value with this The order of one pre-coding matrix has the first correspondence, the combined coding value and the first code book index of first pre-coding matrix Value have the second correspondence, and carry the combined coding value bit number be 4 or 5；

S230 sends the pre-coding matrix instruction PMI for including the combined coding value to base station, in order to which the base station is according to this PMI determines first pre-coding matrix.

Therefore, the method for the transmitting pre-encoding matrix of the embodiment of the present invention can not change feedback model and feedback ratio In the case of spy, instruction is more suitable for the pre-coding matrix of even linear array antenna, and can ensure not influence to be applied to double The performance of poliarizing antenna so as to improve system performance, and enhances user experience.

Specifically, in 3GPP LTE R10 systems, for 8 antenna codebooks, the son of PUCCH feedback pattern 1-1 Pattern 1 uses order RI as shown in table 8 and the first code book index i₁The mode of combined coding.

Table 8

In embodiments of the present invention, when 4 antennas enhancing code book supports the subpattern 1 of PUCCH feedback pattern 1-1, i.e., when 4 Antenna enhancing code book supports order RI and the first code book index i₁During combined coding, 4 antennas enhancing code book can be divided into and only support order Combined coding situation and 4 antennas enhancing code book that RI is 1 and 2 support the combined coding situation that order RI is 1 to 4.It will divide below It is not described.

When 4 antennas enhancing code book according to embodiments of the present invention only supports the combined coding that order RI is 1 and 2, in this hair In bright embodiment, optionally, pair of the value of the combined coding value Yu the sum of ranks of first pre-coding matrix first code book index It should be related to as shown in following table B1：

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

As shown in table B1, the 4 antennas enhancing code book that table B1 is determined employs down-sampling, and carries the combined coding value I_RI/PMI1Bit number for 4, i.e. RI and i₁Combined coding one share 4 bits and represent.

4 antennas enhancing code book according to embodiments of the present invention can not also use down-sampling, and code book is finer at this time, such as As shown in table B4,4 antenna enhancing code book also only supports the combined coding that order RI is 1 and 2, but in the code book, RI and i₁'s Combined coding needs to be represented with 5 bits altogether.

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

When 4 antennas enhancing code book according to embodiments of the present invention supports the combined coding that order RI is 1 to 4, according to 8 antennas Codebook structure, it may be determined that order be 3 or 4（It is 3 layers or 4 layers to transmit the number of plies）4 antennas enhancing code book, respectively such as 9 He of table Shown in table 10, wherein, the first code book index i₁Value be fixed as 0, be not required additional bit represent.

Table 9

Table 10

Wherein, v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

In embodiments of the present invention, optionally, carry the combined coding value bit number be 5 when, the combined coding The correspondence of value and the value of the first code book index of sum of ranks of first pre-coding matrix is determined by following table table B5：

Table B5

In table B5, the code book that order RI is 1 and 2 has carried out down-sampling, and RI and i₁Combined coding altogether need with 5 A bit represents.

In order to further improve RI and i₁Combined coding feedback performance, the bit number of feedback can be limited to 4 Bit, at this point, the correspondence of the value of the combined coding value Yu the sum of ranks of first pre-coding matrix first code book index by Following table B2 or table B3 are determined：

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

In table B2, when order RI is 1, corresponding i₁There are 8 kinds of states；When order RI is 2, corresponding i₁There are 6 kinds of states； When order RI is 3 and 4, corresponding i₁There are a kind of state, and RI and i respectively₁Combined coding altogether only represented with 4 bits. In table B3, when order RI is 1 and 2, corresponding i₁There are 7 kinds of states respectively；When order RI is 3 and 4, corresponding i₁1 kind of shape respectively State, and RI and i₁Combined coding altogether only represented with 4 bits.

Above in conjunction with Fig. 1 and Fig. 2, it is pre- that transmission according to embodiments of the present invention is described in detail from the angle of user equipment The method of encoder matrix below in conjunction with Fig. 3 and Fig. 4, describes transmission according to embodiments of the present invention from the angle of base station and prelists The method of code matrix.

As shown in figure 3, the method 300 of transmitting pre-encoding matrix according to embodiments of the present invention can be performed by base station, it should Method 300 includes：

S310, receives the pre-coding matrix instruction PMI that user equipment is sent, which includes being used to indicate the first code book collection The value of the first PMI of the first pre-coding matrix in conjunction and the value of the 2nd PMI；

S320 according to the value of the first PMI and the value of the 2nd PMI, determines the value and the second code book of the first code book index The value of index, first code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, this One codebook set is the subset of second codebook set；

S330, it is true in second codebook set according to the value of first code book index and the value of second code book index Fixed first pre-coding matrix；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the value of the 2nd PMI There is the second correspondence, and the value of corresponding first code book indexes of the first PMI with the value of second code book index The value range of scope second code book index corresponding with the value of the 2nd PMI has incidence relation.

It is to be understood that in embodiments of the present invention, the CSI information that base station can be sent by UE receives the PMI that UE is sent, The CSI information can also include RI and CQI etc..Base station can obtain the pre-coding matrix of UE feedbacks according to RI and PMI, and can Channel quality during being obtained according to CQI using this pre-coding matrix.When base station carries out Single User MIMO transmission to UE, base station The pre-coding matrix can be used to carry out precoding to the downlink data of UE, while can be determined according to CQI to send the lower line number According to modulation coding scheme.When base station carries out multi-user MIMO transmissions to UE, for example, the multiuser MIMO of two users, base station The pre-coding matrix that can be fed back according to the UE pre-coding matrixes fed back and pairing UE, passes through force zero（Zero Forcing, letter Referred to as " ZF "）Method, the pre-coding matrix for the multi-user interference that can be eliminated.Thus, base station can use the precoding Matrix carries out precoding to the downlink data of multiuser MIMO.Also, base station can be determined according to the CQI of two user feedbacks The two users carry out modulation coding scheme during multi-user MIMO transmissions.For sake of simplicity, details are not described herein.

In embodiments of the present invention, optionally, the value range of corresponding first code book indexes of the first PMI with this The value range of corresponding second code book indexes of two PMI has incidence relation, including：The corresponding second codes of 2nd PMI The value range of this index is uniquely determined by the value and/or value range of corresponding first code book indexes of the first PMI.

Optionally, the value range of corresponding first code book indexes of the first PMI it is corresponding with the 2nd PMI this second The value range of code book index has incidence relation, including：The value range bag of corresponding first code book indexes of first PMI Include the mutually different at least two first value set of element, the value range of corresponding second code book indexes of the 2nd PMI Including the mutually different at least two second value set of element, at least two first value set with this at least two second Value set has one-to-one relationship.

In embodiments of the present invention, optionally, each first value set bag in at least two first value set At least two values are included, each second value set in at least two second value set includes at least two values.

In embodiments of the present invention, optionally, the value range of corresponding second code book indexes of the 2nd PMI includes The quantity of value is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

Optionally, which includes eight discrete Fourier transform DFT vectors；Or the first codebook set bag The half of the quantity for the pre-coding matrix that the quantity of the DFT vectors included includes for first codebook set.

Table A 1

I_PMI1	i₁=2I_PMI1	I_PMI2	i₂
				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

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

Optionally, in embodiments of the present invention, the pre-coding matrix instruction PMI which sends, including： The PMI that the user's equipment is sent is received on one up channel.

It is to be understood that the base station of base station side description and the interaction of user equipment and correlation properties, function etc. and user equipment side The description with reference to figure 1 it is corresponding, for sake of simplicity, details are not described herein.

Fig. 4 shows the schematic flow chart of the method 300 of transmitting pre-encoding matrix according to embodiments of the present invention, the party Method 300 can be performed by user equipment.As shown in figure 4, this method 300 includes：

S410, receives the pre-coding matrix instruction PMI that user equipment is sent, which includes being used to indicate the first code book collection The combined coding value of the first pre-coding matrix in conjunction；

S420 according to the combined coding value, determines the of the sum of ranks of first pre-coding matrix first pre-coding matrix The value of one code book index, wherein, the combined coding value and the order of first pre-coding matrix have the first correspondence, the joint The value of encoded radio and the first code book index of first pre-coding matrix has the second correspondence, and carries the combined coding The bit number of value is 4 or 5；

S430, according to the value of the first code book index of the sum of ranks of first pre-coding matrix first pre-coding matrix, Applied to first pre-coding matrix is determined in the second codebook set of four antennas, which is the second code book collection The subset of conjunction.

In embodiments of the present invention, optionally, carry the combined coding value bit number be 4 when, the combined coding The correspondence of the value of value with the sum of ranks of first pre-coding matrix first code book index is true by following table B1, table B2 or table B3 It is fixed：

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

In embodiments of the present invention, optionally, carry the combined coding value bit number be 5 when, the combined coding The correspondence of value and the value of the first code book index of sum of ranks of first pre-coding matrix is determined by following table B4 or table B5：

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

It is to be understood that the base station of base station side description and the interaction of user equipment and correlation properties, function etc. and user equipment side The description with reference to figure 2 it is corresponding, for sake of simplicity, details are not described herein.

Above in conjunction with Fig. 1 to Fig. 4, the method that transmitting pre-encoding matrix according to embodiments of the present invention is described in detail, Below in conjunction with Fig. 5 to Figure 12, user equipment according to embodiments of the present invention and base station is described in detail.

Fig. 5 shows the schematic block diagram of user equipment 600 according to embodiments of the present invention, as shown in figure 5, the user sets Standby 600 include：

First determining module 610, for determining the first pre-coding matrix, first codebook set in the first codebook set For the subset of the second codebook set, the pre-coding matrix which includes is by the first code book index and the second code book rope Draw instruction；

Second determining module 620, for determining to be used to indicate definite the first precoding square of first determining module 610 The value of the first pre-coding matrix instruction PMI of battle array and the value of the 2nd PMI；

Sending module 630, for sending PMI to base station, which is used to refer to including what second determining module 620 determined Show the value of the first PMI of first pre-coding matrix and the value of the 2nd PMI, in order to which the base station determines this according to the PMI Pre-coding matrix；

Therefore, the user equipment of the embodiment of the present invention, by the value ranges of corresponding first code book indexes of the first PMI with The value range of corresponding second code book indexes of 2nd PMI has incidence relation, can not change feedback model and feedback ratio In the case of spy, instruction is more suitable for the pre-coding matrix of even linear array antenna, and can ensure not influence to be applied to double The performance of poliarizing antenna so as to improve system performance, and enhances user experience.

In embodiments of the present invention, optionally, the value range of corresponding second code book indexes of the 2nd PMI by this The value and/or value range of corresponding first code book indexes of one PMI uniquely determine.

Optionally, as one embodiment, the value range of corresponding first code book indexes of the first PMI includes element Mutually different at least two first value set, the value range of corresponding second code book indexes of the 2nd PMI include member The mutually different at least two second value set of element, at least two first value set and at least two second value collection Closing has one-to-one relationship.

Optionally, as one embodiment, what the value ranges of corresponding second code book indexes of the 2nd PMI included takes The quantity of value is more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

Optionally, as one embodiment, which includes eight discrete Fourier transform DFT vectors；Or The one of the quantity for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set Half.

Table A 1

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

Optionally, as one embodiment, the pre-coding matrix which includes is applied to four antennas Pre-coding matrix；Or the pre-coding matrix that it is 1 applied to four antennas and order that the pre-coding matrix that includes of first codebook set, which is,.

Optionally, as one embodiment, which is specifically used for：To the base station on a up channel Send the PMI.

It is to be understood that user equipment 600 according to embodiments of the present invention may correspond to perform biography according to embodiments of the present invention The user equipment of the method for defeated pre-coding matrix, and above and other operation of the modules in user equipment 600 and/or Function is in order to realize the corresponding flow of the method in Fig. 1, for sake of simplicity, details are not described herein.

Fig. 6 shows the schematic block diagram of user equipment 700 according to embodiments of the present invention.As shown in fig. 7, the user sets Standby 700 include：

First determining module 710, for determining the first pre-coding matrix, first codebook set in the first codebook set To be applied to the subset of the second codebook set of four antennas, the pre-coding matrix which includes is by the first code book rope Draw and indicated with the second code book index；

Second determining module 720, for determining to be used to indicate definite the first precoding square of first determining module 710 The combined coding value of battle array, wherein, the combined coding value and the order of first pre-coding matrix have the first correspondence, the joint The value of encoded radio and the first code book index of first pre-coding matrix has the second correspondence, and carries the combined coding The bit number of value is 4 or 5；

Sending module 730, for sending pre-coding matrix instruction PMI to base station, which includes second determining module 720 definite combined coding values, in order to which the base station determines first pre-coding matrix according to the PMI.

Therefore, the user equipment of the embodiment of the present invention can refer in the case where not changing feedback model and feedback bits Show more pre-coding matrixes suitable for even linear array antenna, and can ensure not influence the property applied to dual polarized antenna Can, so as to improve system performance, and enhance user experience.

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

It is to be understood that user equipment 700 according to embodiments of the present invention may correspond to perform biography according to embodiments of the present invention The user equipment of the method for defeated pre-coding matrix, and above and other operation of the modules in user equipment 700 and/or Function is in order to realize the corresponding flow of the method in Fig. 2, for sake of simplicity, details are not described herein.

Fig. 7 shows the schematic block diagram of base station 800 according to embodiments of the present invention.As shown in fig. 7, the base station 800 is wrapped It includes：

Receiving module 810, for receiving the pre-coding matrix instruction PMI of user equipment transmission, which includes being used to indicate The value of the first PMI of the first pre-coding matrix in first codebook set and the value of the 2nd PMI；

First determining module 820, for the value of the first PMI that is received according to the receiving module 810 and the 2nd PMI Value, determines the value of the first code book index and the value of the second code book index, and first code book index and the second code book index are used to refer to Show the pre-coding matrix in the second codebook set, which is the subset of second codebook set；

Second determining module 830 for the value according to definite first code book index of first determining module 820 and is somebody's turn to do The value of second code book index determines first pre-coding matrix in second codebook set；

Therefore, the base station of the embodiment of the present invention passes through the value range and second of corresponding first code book indexes of the first PMI The value range of corresponding second code book indexes of PMI has incidence relation, can not change feedback model and feedback bits In the case of, instruction is more suitable for the pre-coding matrix of even linear array antenna, and can ensure not influence to be applied to dual polarization The performance of antenna so as to improve system performance, and enhances user experience.

In embodiments of the present invention, optionally, the value range of corresponding first code book indexes of the first PMI includes member The mutually different at least two first value set of element, the value range of corresponding second code book indexes of the 2nd PMI include The mutually different at least two second value set of element, at least two first value set and at least two second value Set has one-to-one relationship.

Optionally, as an example, each first value set in at least two first value set is included extremely Few two values, each second value set in at least two second value set include at least two values.

Optionally, as an example, the value that the value range of corresponding second code book indexes of the 2nd PMI includes Quantity be more than 2^N, wherein N is the bit number of the value of the 2nd PMI of carrying.

Optionally, as an example, which includes eight discrete Fourier transform DFT vectors；It or should The half of the quantity for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set.

Table A 1

Table A 2

Wherein,v_m=[1 e^j2πm/32]^T,M and n is nonnegative integer.

Optionally, as an example, the pre-coding matrix which includes is applied to the pre- of four antennas Encoder matrix；Or the pre-coding matrix that it is 1 applied to four antennas and order that the pre-coding matrix that includes of first codebook set, which is,.

Optionally, in embodiments of the present invention, which is specifically used for：The user is received on a up channel The PMI that equipment is sent.

It is to be understood that base station 800 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention it is pre- The base station of the method for encoder matrix, and above and other operation and/or function of the modules in base station 800 is in order to realize The corresponding flow of method in Fig. 3, for sake of simplicity, details are not described herein.

Fig. 8 shows the schematic block diagram of base station 900 according to embodiments of the present invention.As shown in figure 8, the base station 900 is wrapped It includes：

Receiving module 910, for receiving the pre-coding matrix instruction PMI of user equipment transmission, which includes being used to indicate The combined coding value of the first pre-coding matrix in first codebook set；

First determining module 920 for the combined coding value received according to the receiving module 910, determines that this is first pre- The value of first code book index of the sum of ranks of encoder matrix first pre-coding matrix, wherein, the combined coding value is first pre- with this The order of encoder matrix has the first correspondence, the combined coding value and the value of the first code book index of first pre-coding matrix With the second correspondence, and the bit number for carrying the combined coding value is 4 or 5；

Second determining module 930, for the sum of ranks of first pre-coding matrix determined according to first determining module 920 The value of first code book index of first pre-coding matrix determines that this is first pre- in the second codebook set applied to four antennas Encoder matrix, first codebook set are the subset of second codebook set.

Therefore, the base station of the embodiment of the present invention can indicate more in the case where not changing feedback model and feedback bits More pre-coding matrixes suitable for even linear array antenna, and can ensure not influence the performance applied to dual polarized antenna, from And system performance can be improved, and enhance user experience.

Table B1

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1
8-15	2	2（I_RI/PMI1-8）

Table B2

I_RI/PMI1	RI	i₁
			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	i₁
			0-6	1	2I_RI/PMI1
7-13	2	2（I_RI/PMI1-8）
			14	3	0
15	4	0

Table B4

I_RI/PMI1	RI	i₁
			0-15	1	I_RI/PMI1
16-31	2	I_RI/PMI1-16

Table B5

I_RI/PMI1	RI	i₁
			0-7	1	2I_RI/PMI1

8-15	2	2（I_RI/PMI1-8）
			16	3	0
17	4	0
			18-31	Retain	It is empty

It is to be understood that base station 900 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention it is pre- The base station of the method for encoder matrix, and above and other operation and/or function of the modules in base station 900 is in order to realize The corresponding flow of method in Fig. 4, for sake of simplicity, details are not described herein.

In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/ Or ", it is only a kind of incidence relation for describing affiliated partner, expression may have three kinds of relations, for example, A and/or B, it can be with table Show：Individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character "/" herein, typicallys represent front and rear Affiliated partner is a kind of relation of "or".

It is to be understood that in embodiments of the present invention, " B corresponding with A " represents that B is associated with A, and B can be determined according to A.But It should also be understood that determining that B is not meant to determine B only according to A according to A, can also B be determined according to A and/or other information.

As shown in figure 9, the embodiment of the present invention additionally provides a kind of user equipment 10, the user's equipment 10 includes processor 11st, memory 12, bus system 13 and transmitter 14.Wherein, processor 11, memory 12 and transmitter 14 pass through bus system 13 are connected, and for storing instruction, which is used to perform the instruction of the memory 12 storage to the memory 12, to control hair Device 14 is sent to send signal.Wherein, which is used for：The first pre-coding matrix is determined in the first codebook set, this first Codebook set is the subset of the second codebook set, and the pre-coding matrix which includes is by the first code book index and the Two code book indexes indicate；The processor 11 is additionally operable to：Determine to be used to indicate the first pre-coding matrix of first pre-coding matrix Indicate the value of PMI and the value of the 2nd PMI；The transmitter 14 is used for：To base station send PMI, the PMI include be used to indicate this first The value of first PMI of pre-coding matrix and the value of the 2nd PMI, in order to which the base station determines the precoding square according to the PMI Battle array；Wherein, the value of the value of the first PMI and first code book index has the first correspondence, the value of the 2nd PMI with this The value of two code book indexes has the second correspondence, and the value range of corresponding first code book indexes of the first PMI with The value range of corresponding second code book indexes of 2nd PMI has incidence relation.

It is to be understood that in each embodiment of the present invention, which can be central processing unit（Central Processing Unit, referred to as " CPU "）, which can also be other general processors, digital signal processor （DSP）, application-specific integrated circuit（ASIC）, ready-made programmable gate array（FPGA）Or other programmable logic device, discrete gate Or transistor logic, discrete hardware components etc..General processor can be that microprocessor or the processor can also It is any conventional processor etc..

The memory can include read-only memory and random access memory, and provide instruction and data to processor. The a part of of memory can also include nonvolatile RAM.For example, memory can be with storage device type Information.

It is total can also to include power bus, controlling bus and status signal in addition to including data/address bus for the bus system Line etc..But for the sake of clear explanation, various buses are all designated as bus system in figure.

During realization, each step of the above method can by the integrated logic circuit of the hardware in processor or The instruction of software form is completed.The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware processor It performs completion or performs completion with the hardware in processor and software module combination.Software module can be located at random storage Device, flash memory, read-only memory, this fields such as programmable read only memory or electrically erasable programmable memory, register into In ripe storage medium.The storage medium is located at memory, and processor reads the information in memory, is completed with reference to its hardware The step of stating method.To avoid repeating, it is not detailed herein.

Optionally, as one embodiment, the value ranges of corresponding second code book indexes of the 2nd PMI by this first The value and/or value range of corresponding first code book indexes of PMI uniquely determine.

Optionally, as one embodiment, each first value set in at least two first value set includes At least two values, each second value set in at least two second value set include at least two values.

Optionally, as one embodiment, the first PMI, the 2nd PMI, first code book corresponding with the first PMI The value of index and second code book index corresponding with the 2nd PMI is determined by Table A 1.

Optionally, as one embodiment, the pre-coding matrix W which includes is determined by Table A 2.

Optionally, as one embodiment, transmitter 14, which is specifically used for sending to the base station on a up channel, to be somebody's turn to do PMI。

It is to be understood that user equipment 10 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention The user equipment of the method for pre-coding matrix and user equipment 600, and the modules in user equipment 10 above-mentioned and Other operation and/or functions are in order to realize the corresponding flow of the method in Fig. 1, for sake of simplicity, details are not described herein.

As shown in Figure 10, the embodiment of the present invention additionally provides a kind of user equipment 20, and the user's equipment 20 includes processor 21st, memory 22, bus system 23 and transmitter 24.Wherein, processor 21, memory 22 and transmitter 24 pass through bus system 23 are connected, and for storing instruction, which is used to perform the instruction of the memory 22 storage to the memory 22, to control hair Device 24 is sent to send signal.Wherein, which is used for：The first pre-coding matrix is determined in the first codebook set, this first Codebook set is the subset of the second codebook set applied to four antennas, and the pre-coding matrix which includes is by the One code book index and the instruction of the second code book index；The processor 21 is additionally operable to：It determines to be used to indicate first pre-coding matrix Combined coding value, wherein, the combined coding value and the order of first pre-coding matrix have the first correspondence, the combined coding Value and the value of the first code book index of first pre-coding matrix have the second correspondence, and carry the combined coding value Bit number is 4 or 5；The transmitter 24 is used for：Being sent to base station includes the pre-coding matrix instruction of the combined coding value PMI, in order to which the base station determines first pre-coding matrix according to the PMI.

Optionally, as one embodiment, when carrying the bit number of the combined coding value and being 4, the combined coding value It is true by following table B1, table B2 or table B3 with the correspondence of the value of the sum of ranks of first pre-coding matrix first code book index It is fixed.

Optionally, as one embodiment, when carrying the bit number of the combined coding value and being 5, the combined coding value It is determined with the correspondence of the value of the first code book index of sum of ranks of first pre-coding matrix by following table B4 or table B5.

It is to be understood that user equipment 20 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention The user equipment of the method for pre-coding matrix and user equipment 700, and the modules in user equipment 20 above-mentioned and Other operation and/or functions are in order to realize the corresponding flow of the method in Fig. 2, for sake of simplicity, details are not described herein.

As shown in figure 11, the embodiment of the present invention additionally provides a kind of base station 30, which includes processor 31, memory 32nd, bus system 33 and receiver 34.Wherein, processor 31, memory 32 and receiver 34 are connected by bus system 33, should For storing instruction, which is used to perform the instruction of the memory 32 storage to memory 32, is connect with controlling and receiving device 34 The collection of letters number.Wherein, which is used for：The pre-coding matrix instruction PMI that user equipment is sent is received, which includes being used for Indicate the value of the first PMI of the first pre-coding matrix in the first codebook set and the value of the 2nd PMI；The processor 31 is used for： According to the value of the first PMI and the value of the 2nd PMI, the value of the first code book index and the value of the second code book index are determined, this One code book index and the second code book index are used to indicate the pre-coding matrix in the second codebook set, which is should The subset of second codebook set；The processor 31 is additionally operable to：According to the value of first code book index and second code book index Value determines first pre-coding matrix in second codebook set；Wherein, the value of the first PMI and first code book index Value there is the first correspondence, the value of the 2nd PMI and the value of second code book index have the second correspondence, and should The corresponding value ranges of first code book index of first PMI and taking for corresponding second code book index of value of the 2nd PMI Being worth scope has incidence relation.

Optionally, as one embodiment, which is specifically used for reception the user on a up channel and sets The PMI that preparation is sent.

It is to be understood that base station 30 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention and prelist The code base station of method of matrix and base station 800, and above and other operation and/or the work(of the modules in base station 30 It can be in order to realize the corresponding flow of the method in Fig. 3, for sake of simplicity, details are not described herein.

As shown in figure 12, the embodiment of the present invention additionally provides a kind of base station 40, which includes processor 41, memory 42nd, bus system 43 and receiver 44.Wherein, processor 41, memory 42 and receiver 44 are connected by bus system 43, should For storing instruction, which is used to perform the instruction of the memory 42 storage to memory 42, is connect with controlling and receiving device 44 The collection of letters number.Wherein, which is used for：The pre-coding matrix instruction PMI that user equipment is sent is received, which includes being used for Indicate the combined coding value of the first pre-coding matrix in the first codebook set；The processor 41 is used for：According to the combined coding Value determines the value of the first code book index of the sum of ranks of first pre-coding matrix first pre-coding matrix, wherein, which compiles The order of code value and first pre-coding matrix has the first correspondence, and the of the combined coding value and first pre-coding matrix The value of one code book index has the second correspondence, and the bit number for carrying the combined coding value is 4 or 5；The processing Device 41 is additionally operable to：According to the value of the first code book index of the sum of ranks of first pre-coding matrix first pre-coding matrix, should For determining first pre-coding matrix in the second codebook set of four antennas, which is second codebook set Subset.

Optionally, as one embodiment, when carrying the bit number of the combined coding value and being 5, the combined coding value It is determined with the correspondence of the value of the sum of ranks of first pre-coding matrix first code book index by following table B4 or table B5.

It is to be understood that base station 40 according to embodiments of the present invention may correspond to perform transmission according to embodiments of the present invention and prelist The code base station of method of matrix and base station 900, and above and other operation and/or the work(of the modules in base station 40 It can be in order to realize the corresponding flow of the method in Fig. 4, for sake of simplicity, details are not described herein.

Those of ordinary skill in the art may realize that each exemplary lists described with reference to the embodiments described herein Member and algorithm steps can be realized with the combination of electronic hardware, computer software or the two, in order to clearly demonstrate hardware With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This A little functions are performed actually with hardware or software mode, specific application and design constraint depending on technical solution.Specially Industry technical staff can realize described function to each specific application using distinct methods, but this realization is not It is considered as beyond the scope of this invention.

It is apparent to those skilled in the art that for convenience of description and succinctly, foregoing description is The specific work process of system, device and unit, may be referred to the corresponding process in preceding method embodiment, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit Division is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component in actual implementation It may be combined or can be integrated into another system or some features can be ignored or does not perform.In addition, shown or beg for The mutual coupling, direct-coupling or communication connection of opinion can be the INDIRECT COUPLING by some interfaces, device or unit Or communication connection or electricity, the connection of mechanical or other forms.

The unit illustrated as separating component may or may not be physically separate, be shown as unit The component shown may or may not be physical location, you can be located at a place or can also be distributed to multiple In network element.Some or all of unit therein can be selected to realize the embodiment of the present invention according to the actual needs Purpose.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that unit is individually physically present or two or more units integrate in a unit.It is above-mentioned integrated The form that hardware had both may be employed in unit is realized, can also be realized in the form of SFU software functional unit.

If the integrated unit is realized in the form of SFU software functional unit and is independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products It embodies, which is stored in a storage medium, is used including some instructions so that a computer Equipment（Can be personal computer, server or the network equipment etc.）Perform the complete of each embodiment the method for the present invention Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only memory（ROM, Read-Only Memory）, random access memory（RAM, Random Access Memory）, magnetic disc or CD etc. are various can store journey The medium of sequence code.

The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right It is required that protection domain subject to.

Claims

A kind of 1. method of transmitting pre-encoding matrix, which is characterized in that including：

The first pre-coding matrix is determined in the first codebook set, first codebook set is the subset of the second codebook set, The pre-coding matrix that second codebook set includes is indicated by the first code book index and the second code book index；

It determines to be used to indicate the value of the first pre-coding matrix instruction PMI of first pre-coding matrix and the value of the 2nd PMI；

PMI is sent to base station, the PMI includes being used to indicate value and the institute of the first PMI of first pre-coding matrix The value of the 2nd PMI is stated, in order to which the base station determines the pre-coding matrix according to the PMI；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the 2nd PMI's Value and the value of second code book index have the second correspondence, and the corresponding first code book ropes of the first PMI The value range of the value range drawn second code book index corresponding with the 2nd PMI has incidence relation.
2. according to the method described in claim 1, it is characterized in that, the first PMI corresponding first code book indexes The value range of value range second code book index corresponding with the 2nd PMI has incidence relation, including：

The value range of corresponding second code book index of 2nd PMI is corresponding described first yard by the first PMI The value and/or value range of this index uniquely determine.
3. according to the method described in claim 1, it is characterized in that, the first PMI corresponding first code book indexes The value range of value range second code book index corresponding with the 2nd PMI has incidence relation, including：

The value range of corresponding first code book index of first PMI includes element mutually different at least two first Value set, the value range of corresponding second code book index of the 2nd PMI include element mutually different at least two A second value set, at least two first value set has at least two second value set to be corresponded Relation.
4. according to the method described in claim 3, it is characterized in that, in at least two first value set each first Value set includes at least two values, and each second value set in at least two second value set is included at least Two values.
5. according to the method described in claim 1, it is characterized in that, the 2nd PMI corresponding second code book indexes The quantity for the value that value range includes is more than 2^N, wherein N is the bit number for the value for carrying the 2nd PMI.
6. according to the method described in claim 1, it is characterized in that, first codebook set includes eight discrete fouriers changes Change DFT vectors；Or

The number for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set The half of amount.

7. method according to any one of claim 1 to 6, which is characterized in that the first PMI, the 2nd PMI, The value of corresponding first code book indexes of first PMI and corresponding second code book indexes of the 2nd PMI It is determined by Table A 1：

Table A 1

Wherein, I_PMI1Represent the first PMI；I_PMI2Represent the 2nd PMI；i₁Represent first code book index；i₂It represents Second code book index.

8. the method according to the description of claim 7 is characterized in that the pre-coding matrix W that includes of second codebook set by Table A 2 determines：

Table A 2

Wherein,M and n is nonnegative integer.
9. method according to any one of claim 1 to 6, which is characterized in that first codebook set includes pre- Encoder matrix is the pre-coding matrix applied to four antennas；Or the pre-coding matrix that includes of first codebook set be applied to Four antennas and the pre-coding matrix that order is 1.
10. method according to any one of claim 1 to 6, which is characterized in that it is described to send PMI to base station, including：

On a up channel PMI is sent to the base station.
A kind of 11. method of transmitting pre-encoding matrix, which is characterized in that including：

Receive the pre-coding matrix instruction PMI that user equipment is sent, the PMI includes being used to indicate the in the first codebook set The value of the first PMI of one pre-coding matrix and the value of the 2nd PMI；

According to the value of the first PMI and the value of the 2nd PMI, the value and the second code book index of the first code book index are determined Value, 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 second codebook set；

According to the value of first code book index and the value of second code book index, first pre-coding matrix is determined；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the 2nd PMI's Value and the value of second code book index have the second correspondence, and the corresponding first code book ropes of the first PMI The value range of the value range drawn second code book index corresponding with the value of the 2nd PMI has incidence relation.
12. according to the method for claim 11, which is characterized in that corresponding first code book index of the first PMI Value range second code book index corresponding with the 2nd PMI value range have incidence relation, including：

The value range of corresponding second code book index of 2nd PMI is corresponding described first yard by the first PMI The value and/or value range of this index uniquely determine.
13. according to the method for claim 11, which is characterized in that corresponding first code book index of the first PMI Value range second code book index corresponding with the 2nd PMI value range have incidence relation, including：

The value range of corresponding first code book index of first PMI includes element mutually different at least two first Value set, the value range of corresponding second code book index of the 2nd PMI include element mutually different at least two A second value set, at least two first value set has at least two second value set to be corresponded Relation.
14. according to the method for claim 13, which is characterized in that each the in at least two first value set One value set includes at least two values, and each second value set in at least two second value set is included extremely Few two values.
15. according to the method for claim 11, which is characterized in that corresponding second code book index of the 2nd PMI The quantity of value that includes of value range be more than 2^N, wherein N is the bit number for the value for carrying the 2nd PMI.
16. according to the method for claim 11, which is characterized in that first codebook set includes eight discrete fouriers Convert DFT vectors；Or

The number for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set The half of amount.
17. the method according to any one of claim 11 to 16, which is characterized in that the first PMI, described second PMI, corresponding first code book indexes of the first PMI and corresponding second code book indexes of the 2nd PMI Value is determined by Table A 1：

Table A 1

Wherein, I_PMI1Represent the first PMI；I_PMI2Represent the 2nd PMI；i₁Represent first code book index；i₂It represents Second code book index.
18. according to the method for claim 17, which is characterized in that the pre-coding matrix W that second codebook set includes It is determined by Table A 2：

Table A 2

Wherein,M and n is nonnegative integer.
19. the method according to any one of claim 11 to 16, which is characterized in that first codebook set included Pre-coding matrix is the pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is application In the pre-coding matrix that four antennas and order are 1.
20. the method according to any one of claim 11 to 16, which is characterized in that described to receive what user equipment was sent Pre-coding matrix instruction PMI, including：

The PMI that the user equipment is sent is received on a up channel.
21. a kind of user equipment, which is characterized in that including：

First determining module, for determining the first pre-coding matrix in the first codebook set, first codebook set is the The subset of two codebook sets, the pre-coding matrix that second codebook set includes is by the first code book index and the second code book index Instruction；

Second determining module, for determining to be used to indicate the of first pre-coding matrix that first determining module determines The value of one pre-coding matrix instruction PMI and the value of the 2nd PMI；

Sending module, for sending PMI to base station, what the PMI included that second determining module determines is used to indicate described The value of the first PMI of first pre-coding matrix and the value of the 2nd PMI, in order to which the base station is true according to the PMI The fixed pre-coding matrix；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the 2nd PMI's Value and the value of second code book index have the second correspondence, and the corresponding first code book ropes of the first PMI The value range of the value range drawn second code book index corresponding with the 2nd PMI has incidence relation.
22. user equipment according to claim 21, which is characterized in that corresponding second code book of the 2nd PMI The value range of index is uniquely determined by the value and/or value range of corresponding first code book indexes of the first PMI.
23. user equipment according to claim 21, which is characterized in that corresponding first code book of the first PMI The value range of index includes the mutually different at least two first value set of element, the 2nd PMI corresponding described the The value range of two code book indexes includes the mutually different at least two second value set of element, and described at least two first take Value set has one-to-one relationship at least two second value set.
24. user equipment according to claim 23, which is characterized in that every in at least two first value set A first value set includes at least two values, each second value set bag in at least two second value set Include at least two values.
25. user equipment according to claim 21, which is characterized in that corresponding second code book of the 2nd PMI The quantity for the value that the value range of index includes is more than 2^N, wherein N is the bit number for the value for carrying the 2nd PMI.
26. user equipment according to claim 21, which is characterized in that first codebook set includes eight discrete Fu In leaf transformation DFT vector；Or

The number for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set The half of amount.
27. the user equipment according to any one of claim 21 to 26, which is characterized in that the first PMI, described Two PMI, corresponding first code book indexes of the first PMI and corresponding second code book indexes of the 2nd PMI Value determined by Table A 1：

Table A 1

Wherein, I_PMI1Represent the first PMI；I_PMI2Represent the 2nd PMI；i₁Represent first code book index；i₂It represents Second code book index.
28. user equipment according to claim 27, which is characterized in that the precoding square that second codebook set includes Battle array W is determined by Table A 2：

Table A 2

Wherein,M and n is nonnegative integer.
29. the user equipment according to any one of claim 21 to 26, which is characterized in that the first codebook set bag The pre-coding matrix included is the pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is Applied to the pre-coding matrix that four antennas and order are 1.
30. the user equipment according to any one of claim 21 to 26, which is characterized in that the sending module is specifically used In：On a up channel PMI is sent to the base station.
31. a kind of base station, which is characterized in that including：

Receiving module, for receiving the pre-coding matrix instruction PMI, the PMI of user equipment transmission including being used to indicate first The value of the first PMI of the first pre-coding matrix in codebook set and the value of the 2nd PMI；

First determining module, for the value of the first PMI and the value of the 2nd PMI received according to the receiving module, Determine the value of the first code book index and the value of the second code book index, first code book index and the second code book index are used to indicate Pre-coding matrix in second codebook set, first codebook set are the subset of second codebook set；

Second determining module, for the value and described second of first code book index determined according to first determining module The value of code book index determines first pre-coding matrix；

Wherein, the value of the first PMI and the value of first code book index have the first correspondence, the 2nd PMI's Value and the value of second code book index have the second correspondence, and the corresponding first code book ropes of the first PMI The value range of the value range drawn second code book index corresponding with the value of the 2nd PMI has incidence relation.
32. base station according to claim 31, which is characterized in that corresponding second code book index of the 2nd PMI Value range uniquely determined by the value and/or value range of corresponding first code book indexes of the first PMI.
33. base station according to claim 31, which is characterized in that corresponding first code book index of the first PMI Value range include the mutually different at least two first value set of element, the corresponding second code of the 2nd PMI The value range of this index includes the mutually different at least two second value set of element, at least two first value collection Close has one-to-one relationship at least two second value set.
34. base station according to claim 33, which is characterized in that each in at least two first value set One value set includes at least two values, and each second value set in at least two second value set is included extremely Few two values.
35. base station according to claim 31, which is characterized in that corresponding second code book index of the 2nd PMI The quantity of value that includes of value range be more than 2^N, wherein N is the bit number for the value for carrying the 2nd PMI.
36. base station according to claim 31, which is characterized in that first codebook set includes eight discrete fouriers Convert DFT vectors；Or

The number for the pre-coding matrix that the quantity for the DFT vectors that first codebook set includes includes for first codebook set The half of amount.

37. the base station according to any one of claim 31 to 36, which is characterized in that the first PMI, described second PMI, corresponding first code book indexes of the first PMI and corresponding second code book indexes of the 2nd PMI Value is determined by Table A 1：

Table A 1

38. the base station according to claim 37, which is characterized in that the pre-coding matrix W that second codebook set includes It is determined by Table A 2：

Table A 2

Wherein,M and n is nonnegative integer.
39. the base station according to any one of claim 31 to 36, which is characterized in that first codebook set included Pre-coding matrix is the pre-coding matrix applied to four antennas；Or the pre-coding matrix that first codebook set includes is application In the pre-coding matrix that four antennas and order are 1.
40. the base station according to any one of claim 31 to 36, which is characterized in that the receiving module is specifically used for： The PMI that the user equipment is sent is received on a up channel.