CN104303442B

CN104303442B - Feedback method, receiving terminal and the transmitting terminal of pre-coding matrix instruction

Info

Publication number: CN104303442B
Application number: CN201380001967.5A
Authority: CN
Inventors: 张雷鸣; 吴强; 刘江华; 王建国
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-03-08
Filing date: 2013-05-17
Publication date: 2018-04-20
Anticipated expiration: 2033-05-17
Also published as: CN104303442A; CN108322244B; CN108599819A; CN108599819B; CN108322243B; CN108322243A; CN108322244A

Abstract

The present invention provides a kind of feedback method of pre-coding matrix instruction, receiving terminal and transmitting terminal, and this method includes：Receiving terminal is based on reference signal, and pre-coding matrix W is selected from code book, wherein,The θ₁With the θ₂Phase difference of adjacent two antennas in transmitting terminal first antenna group and the second antenna sets for same transport layer transmitting signal weighting value is represented respectively, it is describedThe first antenna group and second antenna sets are represented for the phase difference of same transport layer transmitting signal weighting value andM is positive integer, and n is the nonnegative integer less than M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and second antenna sets belong to same multiaerial system；The receiving terminal sends pre-coding matrix instruction PMI to the transmitting terminal.In this manner it is ensured that the weak dependence of antenna, effectively improves the precision of precoding, so as to reduce performance loss, the handling capacity of system is improved.

Description

Feedback method, receiving terminal and the transmitting terminal of pre-coding matrix instruction

Technical field

The present embodiments relate to wireless communication field, and more particularly, to the feedback side of pre-coding matrix instruction Method, receiving terminal and transmitting terminal.

Background technology

By launching precoding technique and receiving folding, multiple-input, multiple-output（Multiple Input Multiple Output, MIMO）Wireless communication system can obtain diversity and array gain.It can be expressed as using the system of precoding

Wherein, y is to receive signal phasor, and H is channel matrix,It is pre-coding matrix, s is the symbolic vector of transmitting, and n is Measurement noise.

Optimal precoding usually requires the completely known channel condition information of transmitter（Channel State Information, CSI）.Common method is user equipment（User Equipment, UE）Instantaneous CSI is quantified and reported Accuse includes mobile station to base station, wherein user equipment（Mobile Station, MS）, relaying（Relay）, mobile phone （Mobile Telephone）, mobile phone（handset）And portable equipment（portable equipment）Deng base station includes node B（NodeB）Base station（Base station, BS）, access point（Access Point）, launch point（Transmission Point, TP）, enode b（Evolved Node B, eNB）Or relaying（Relay）Deng.Existing Long Term Evolution（Long TermEvolution, LTE）The CSI information of System Reports includes order instruction（Rank Indicator, RI）, pre-coding matrix refers to Show（Precoding Matrix Indicator, PMI）Indicated with channel quality（ChannelQuality Indicator, CQI）Information etc., wherein, RI and PMI indicate respectively the transmission number of plies used and pre-coding matrix.It is commonly referred to as used to prelist The collection of code matrix is combined into code book, and each pre-coding matrix therein is the code word in code book.

The strong correlation characteristic between the codebook design used in existing LTE system is all based on antenna.But with same pole Change the increase of the spacing between two antennas in direction, the correlation between antenna gradually weakens, and based on strong correlation between antenna The phase difference of antenna element involved in the code book of characteristic maintains unanimously.Therefore, existing codebook design be applied to spacing compared with The scene of big antenna configuration can not be matched preferably, cause the PMI information that base station is fed back according to UE to carry out precoding accuracy Reduce, so as to cause performance loss larger, reduce the handling capacity of system.

The content of the invention

An embodiment of the present invention provides a kind of feedback method of pre-coding matrix instruction, receiving terminal and transmitting terminal, Neng Gouti The precision of high precoding, so as to reduce performance loss, improves the handling capacity of system.

First aspect, there is provided a kind of feedback method of pre-coding matrix instruction, this method include：Receiving terminal is based on reference Signal, selects pre-coding matrix W from code book, wherein, it is describedMatrix X₁It is according to θ₁Definite, square Battle array X₂It is according to θ₂WithDefinite, the θ₁Represent that adjacent two antennas in transmitting terminal first antenna group are directed to same transmission The phase difference of layer transmitting signal weighting value, the θ₂Represent that adjacent two antennas in the second antenna sets of transmitting terminal are directed to same biography The phase difference of defeated layer transmitting signal weighting value, it is describedRepresent the first antenna group and second antenna sets for same The transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, and the n is non-less than the M Negative integer, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and described second Antenna sets belong to same multiaerial system；The receiving terminal sends pre-coding matrix instruction PMI to the transmitting terminal, with toilet State transmitting terminal and the W is determined according to the PMI.

With reference to first aspect, in a kind of implementation of first aspect, it is true that the receiving terminal is based on the reference signal Determine order instruction, the order instruction corresponds to the useful transmission number of plies；The receiving terminal is based on reference signal, is selected from code book pre- Encoder matrix W, including：The receiving terminal is based on the reference signal, selection and the corresponding institute of the order instruction from code book State W.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode,

It is described when the order instruction is 1Or

It is described when the order instruction is 2

Wherein, the α and β is constant.

When order instruction is 1,

It is described

When order instruction is 2,

It is described

Wherein, it is describedThe Y1 and Y2 are mutually independent P × 1 Tie up column selection vector, N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and P is just whole less than N Number.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the pre-coding matrix instruction PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂, the PMI₁For indicating the W₁, the PMI₂For indicating the W₂ ¹Or W₂ ²。

It is described

Alternatively,

Wherein, For integer, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, institute It is the positive integer less than N to state P, and α is constant, and θ ' is real number.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the P values are 4, described Y, Y₁' and Y₂' be respectively following column vector in one kind：

With

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the pre-coding matrix instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, the PMI₇For indicating the W₃, the PMI₈For indicating the W₄ ¹。

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, when the order instruction is 2,

Wherein, For integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is Positive integer less than N, β are constant, and θ ' is real number.

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are in two transport layers The phase difference of first transport layer transmitting signal weighting value, the θ₂Specific adjacent two represented in the second antenna sets of transmitting terminal Antenna is for the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first Adjacent two antennas in antenna sets are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, institute State θ₄Represent adjacent two antennas in the second antenna sets of transmitting terminal for second transport layer transmitting letter in two transport layers The phase difference of number weighted value, For integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding in codebook set Two in matrix arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the pre-coding matrix instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the PMI₉For indicating the W₃, the PMI₁₀For indicating the W₄ ²。

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect It is described in modeIt is describedWherein, N=2^k, the k is non-negative Integer, the A are the positive integer of N described in aliquot, and the M is positive integer less than the N, the i₁For less than（N/A-1） Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Independently of each other,For downward rounding operation symbol.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the pre-coding matrix instruction PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄, the PMI₃For indicating the i₁, the PMI₄For indicating the i₂And i₃, the PMI₄For the i₂And i₃Connection Compile in collaboration with code value, the PMI₄=P·i₂+i₃。

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect It is described in modeIt is described

Wherein, N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, the P be less than The positive integer of the N, the i₁For less than（N/A-1）Nonnegative integer,For downward rounding operation symbol, mod transports for modulus Operator number.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the pre-coding matrix instruction PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅For indicating the i₁, the PMI₆For indicating the i₄。

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, reference signal is based in the receiving terminal, after selecting pre-coding matrix W from code book, the method further includes：

The receiving terminal carries out line replacement or column permutation according to the numbering of antenna to the W.

With reference to first aspect and its any of above-mentioned implementation implementation, realized in the another kind of first aspect In mode, reference signal is based in the receiving terminal, before selecting pre-coding matrix W from code book, the method further includes：Institute State receiving terminal and receive the reference signal that the transmitting terminal is sent；Wherein, the reference signal includes at least one of following：Letter The specific reference signal CRS of channel state information reference signal CSI RS, demodulated reference signal DM RS, cell.

Second aspect, there is provided a kind of method for receiving pre-coding matrix instruction, this method include：Transmitting terminal receives Hold the pre-coding matrix instruction PMI sent；The transmitting terminal determines the reception end group according to the pre-coding matrix instruction PMI In the pre-coding matrix W that reference signal is selected from code book, wherein, it is describedMatrix X₁It is according to θ₁Really Fixed, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent adjacent two antennas in transmitting terminal first antenna group for same One transport layer launches the phase difference of signal weighting value, the θ₂Represent that adjacent two antennas in the second antenna sets of transmitting terminal are directed to The phase difference of same transport layer transmitting signal weighting value, it is describedRepresent that the first antenna group and second antenna sets are directed to The phase difference of same transport layer transmitting signal weighting value and describedThe M is positive integer, and the n is less than described The nonnegative integer of M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and institute State the second antenna sets and belong to same multiaerial system.

With reference to second aspect, in a kind of implementation of second aspect, the W is corresponding with order instruction, and the order refers to Show and correspond to the useful transmission number of plies.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode,

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.

When the order instruction is 1,

It is described

When the order instruction is 2,

It is described

Wherein, it is describedThe Y1 and Y2 are mutually independent P × 1 Tie up column selection vector, N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, the P be less than The positive integer of the N.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the pre-coding matrix instruction PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂；The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI The pre-coding matrix W selected, including：The transmitting terminal is according to the PMI₁Determine that the receiving terminal is based on reference signal from code book The W of selection₁, and according to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²；It is correspondingly, described Transmitting terminal is according to the W₁With the W₂ ¹Determine the W, or according to the W₁With the W₂ ²Determine the W.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, when the order instruction is 1,

It is described

Alternatively,

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the P values are 4, described Y, Y₁' and Y₂' be respectively following column vector in one kind：

With

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the pre-coding matrix instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, the transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI The pre-coding matrix W selected, including：The transmitting terminal is according to the PMI₇Determine that the receiving terminal is based on reference signal from code book The W of selection₃, and according to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；Correspondingly, the transmitting End is according to the W₃With the W₄ ¹Determine the W.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, when the order instruction is 2,

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are in two transport layers The phase difference of first transport layer transmitting signal weighting value, the θ₂Specific adjacent two represented in the second antenna sets of transmitting terminal Antenna is for the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first Adjacent two antennas in antenna sets are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, institute State θ₄Represent adjacent two antennas in the second antenna sets of transmitting terminal for second transport layer transmitting letter in two transport layers The phase difference of number weighted value, It is integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one in codebook set prelists Two in code matrix arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is less than N just Integer, β are constant, and θ ' is real number.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the pre-coding matrix instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI The pre-coding matrix W selected, including：The transmitting terminal is according to the PMI₉Determine that the receiving terminal is based on reference signal from code book The W of selection₃, and according to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；Correspondingly, the transmitting End is according to the W₃With the W₄ ²Determine the W.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect It is described in modeIt is describedWherein, N=2^k, the k is non-negative Integer, the A are the positive integer of N described in aliquot, and the M is positive integer less than the N, the i₁For less than（N/A-1） Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Independently of each other,For downward rounding operation symbol.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the pre-coding matrix instruction PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄；The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI The pre-coding matrix W selected, including：The transmitting terminal is according to the PMI₃Determine the i₁, and according to the PMI₄Determine the i₂ And i₃, wherein, the PMI₄For the i₂And i₃Combined coding value, the PMI₄=P·i₂+i₃；The transmitting terminal is according to i₁、i₂And i₃Determine the W that the receiving terminal is selected from code book.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect It is described in modeIt is describedWherein, institute State N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is the positive integer less than the N, institute State i₁For less than（N/A-1）Nonnegative integer,For downward rounding operation symbol, mod is modulo operation symbol.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the pre-coding matrix instruction PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆；The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI The pre-coding matrix W selected, including：The transmitting terminal is according to the PMI₅The i indicated₁With the PMI₆The i indicated₄ Determine the pre-coding matrix W that the receiving terminal is selected from code book.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；The transmitting terminal is according to the pre-coding matrix instruction PMI determines the pre-coding matrix W that the receiving terminal is selected based on reference signal from code book, including：The transmitting terminal is according to institute State the θ of pre-coding matrix instruction PMI instructions₁The pre-coding matrix selected with the definite receiving terminal of Δ θ from code book W。

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, determine that the receiving terminal is based on reference signal from code book according to the pre-coding matrix instruction PMI in the transmitting terminal After the pre-coding matrix W of middle selection, the method further includes：The transmitting terminal is according to the numbering of antenna to the W into every trade Displacement or column permutation.

With reference to any of second aspect and its above-mentioned implementation implementation, realized in the another kind of second aspect In mode, before the pre-coding matrix instruction PMI that the transmitting terminal receives that receiving terminal is sent, the method further includes：It is described Transmitting terminal sends the reference signal to the receiving terminal, so that the receiving terminal is selected based on the reference signal from code book Pre-coding matrix W；Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, solution Adjust reference signal DMRS, the specific reference signal CRS of cell.

The third aspect, there is provided a kind of receiving terminal, the receiving terminal include：Selecting unit, for based on reference signal, from code Pre-coding matrix W is selected in this, wherein, it is describedMatrix X1 is according to θ₁Definite, matrix X₂It is basis θ₂WithDefinite, the θ₁Represent adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting signal The phase difference of weighted value, the θ₂Represent adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting letter The phase difference of number weighted value, it is describedRepresent that the first antenna group and second antenna sets are launched for same transport layer The phase difference of signal weighting value and describedThe M is positive integer, and the n is the nonnegative integer less than the M, The θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and the second antenna sets category In same multiaerial system；Transmitting element, for sending pre-coding matrix instruction PMI to the transmitting terminal, so as to the hair Penetrate end and the W is determined according to the PMI.

With reference to the third aspect, in a kind of implementation of the third aspect, the receiving terminal further includes determination unit, described Determination unit, for determining order instruction based on the reference signal, the order instruction corresponds to the useful transmission number of plies；The choosing Unit is selected to be specifically used for：Based on reference signal, selected from code book corresponding with the order instruction that the determination unit determines Pre-coding matrix W.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode,

When the order instruction that the determination unit determines is 1,

The selecting unit selectionOr

When the order instruction that the determination unit determines is 2,

The selecting unit selection

Wherein, the α and β is constant.

When the order instruction that the determination unit determines is 1, the selecting unit selection

It is described

When the order instruction that the determination unit determines is 2, the selecting unit selection

It is described

Wherein, matrixThe Y1 and Y2 are mutually independent P × 1 Tie up column selection vector, N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, the P be less than The positive integer of the N.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the first pre-coding matrix instruction PMI₁It is pre- with second Encoder matrix indicates PMI₂, the PMI₁For indicating the W₁, the PMI₂For indicating the W₂ ¹Or W₂ ²。

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, when the order instruction that the determination unit determines is 1, the selecting unit selection

It is described

Alternatively,

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the 7th pre-coding matrix instruction PMI₇With Eight pre-coding matrix instruction PMI₈, the PMI₇For indicating the W₃, the PMI₈For indicating the W₄ ¹。

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, when the order instruction that the determination unit determines is 2, the selecting unit selection

It is described

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the 9th pre-coding matrix instruction PMI₉With Ten pre-coding matrix instruction PMI₁₀, the PMI₉For indicating the W₃, the PMI₁₀For indicating the W₄ ²。

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect It is described in modeIt is described

Wherein, N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, the M be less than The positive integer of the N, the i₁For less than（N/A-1）Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Phase It is mutually independent,For downward rounding operation symbol.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the 3rd pre-coding matrix instruction PMI₃It is pre- with the 4th Encoder matrix indicates PMI₄, the PMI₃For indicating the i₁, the PMI₄For indicating the i₂And i₃, the PMI₄For institute State i₂And i₃Combined coding value, PMI₄=P·i₂+i₃。

It is describedIt is described

Wherein, N=2^k, k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N Positive integer, the i₁For less than（N/A-1）Nonnegative integer,For downward rounding operation symbol, mod is modulo operator Number.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the 5th pre-coding matrix instruction PMI₅It is pre- with the 6th Encoder matrix indicates PMI₆, the PMI₅For indicating the i₁, the PMI₆For indicating the i₄。

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the selecting unit is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.

With reference to any of the third aspect and its above-mentioned implementation implementation, realized in the another kind of the third aspect In mode, the receiving terminal further includes receiving unit, the receiving unit, the reference sent for receiving the transmitting terminal Signal；Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulation reference letter Number DM RS, the specific reference signal CRS of cell.

Fourth aspect, there is provided a kind of transmitting terminal, the transmitting terminal include：Receiving unit, for receiving receiving terminal transmission Pre-coding matrix instruction PMI；Determination unit, the pre-coding matrix instruction PMI for being received according to the receiving unit are true The pre-coding matrix W that the fixed receiving terminal is selected based on reference signal from code book, wherein, it is describedSquare Battle array X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent adjacent in transmitting terminal first antenna group Two antennas are for the phase difference of same transport layer transmitting signal weighting value, the θ₂Represent the phase in the second antenna sets of transmitting terminal Adjacent two antennas launch the phase difference of signal weighting value for same transport layer, describedRepresent the first antenna group and described Second antenna sets are for the same transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, The n is the nonnegative integer less than the M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, it is described First antenna group and second antenna sets belong to same multiaerial system.

With reference to fourth aspect, in a kind of implementation of fourth aspect, the W is corresponding with order instruction, and the order refers to Show and correspond to the useful transmission number of plies.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode,

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.

When being designated as 1 described in order,

It is described

When the order instruction is 2,

It is described

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the pre-coding matrix instruction PMI that the receiving unit receives includes the first pre-coding matrix instruction PMI₁With Two pre-coding matrix instruction PMI₂；The determination unit is specifically used for：According to the PMI₁Determine that the receiving terminal is based on reference to letter Number W selected from code book₁, and according to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²； Correspondingly, the determination unit is specifically used for：According to the W₁With the W₂ ¹Determine the W, or according to the W₁With it is described W₂ ²Determine the W.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, when the order instruction is 1,

It is described

Alternatively,

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the P values are 4, described Y, Y₁' and Y₂' be respectively following column vector in one kind：

With

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the pre-coding matrix instruction PMI that the receiving unit receives includes the 7th pre-coding matrix instruction PMI₇With Eight pre-coding matrix instruction PMI₈；The determination unit is specifically used for：According to the PMI₇Determine that the receiving terminal is based on reference to letter Number W selected from code book₃, and according to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；Accordingly , the determination unit is specifically used for：According to the W₃With the W₄ ¹Determine the W.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, when the order instruction is 2,

It is described

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the pre-coding matrix instruction PMI that the receiving unit receives includes the 9th pre-coding matrix instruction PMI₉With Ten pre-coding matrix instruction PMI₁₀, the determination unit is specifically used for：According to the PMI₉Determine that the receiving terminal is based on reference The W that signal is selected from code book₃, and according to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；Phase Answer, the determination unit is specifically used for：According to the W₃With the W₄ ²Determine the W.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect It is described in modeIt is describedWherein, N=2^k, the k is non-negative Integer, the A are the positive integer of N described in aliquot, and the M is positive integer less than the N, the i₁For less than（N/A-1） Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Independently of each other,For downward rounding operation symbol.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the pre-coding matrix instruction PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄；The determination unit is specifically used for：According to the PMI₃Determine the i₁, and according to the PMI₄Determine the i₂And i₃, Wherein, the PMI₄For the i₂And i₃Combined coding value, PMI₄=P·i₂+i₃；According to the i₁、i₂And i₃Determine described connect The pre-coding matrix W that receiving end is selected from code book.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the pre-coding matrix instruction PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆；The determination unit is specifically used for：According to the PMI₅The i indicated₁With the PMI₆The i indicated₄Determine institute State the pre-coding matrix W that receiving terminal is selected from code book.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；The determination unit is specifically used for：According to described pre- The θ of encoder matrix instruction PMI instructions₁The pre-coding matrix W selected with the definite receiving terminal of Δ θ from code book.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the determination unit is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.

With reference to any of fourth aspect and its above-mentioned implementation implementation, realized in the another kind of fourth aspect In mode, the transmitting terminal further includes transmitting element：The transmitting element, it is described with reference to letter for being sent to the receiving terminal Number, the pre-coding matrix W selected so as to the receiving terminal based on the reference signal from code book；Wherein, the reference signal Including at least one of following：Channel state information reference signals CSI RS, demodulated reference signal DM RS, cell specifically refer to Signal CRS.

5th aspect, there is provided a kind of receiving terminal, the receiving terminal include：Processor, for based on reference signal, from code book Middle selection pre-coding matrix W, wherein, it is describedMatrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂ WithDefinite, the θ₁Represent that adjacent two antennas in transmitting terminal first antenna group add for same transport layer transmitting signal The phase difference of weights, the θ₂Represent adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting signal The phase difference of weighted value, it is describedRepresent the first antenna group and second antenna sets for same transport layer transmitting letter The phase difference of number weighted value and describedM is positive integer, and n is the nonnegative integer less than M, in the code book at least There is the θ of a pre-coding matrix₁And θ₂Differ, the first antenna group and second antenna sets belong to same multiple antennas System；Transmitter, for sending pre-coding matrix instruction PMI to the transmitting terminal, so that the transmitting terminal is true according to the PMI The W of the fixed processor selection.

With reference to the 5th aspect, in a kind of implementation of the 5th aspect, the processor is additionally operable to：Based on the reference Signal determines order instruction, and the order instruction corresponds to the useful transmission number of plies；The processor is specifically used for：Based on reference to letter Number, selected from code book and the definite corresponding W of the order instruction.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode,

When the order instruction that the processor determines is 1, the processor selection

Or

When the order instruction that the processor determines is 2, the processor selection

Wherein, the α and β is constant.

It is described

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the pre-coding matrix instruction PMI that the transmitter is sent includes the first pre-coding matrix instruction PMI₁Prelist with second Code matrix instruction PMI₂, the PMI₁For indicating the W₁, the PMI₂For indicating the W₂ ¹Or W₂ ²。

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, when the order instruction that the processor determines is 1, the selecting unit selection

It is described

Alternatively,

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the pre-coding matrix instruction PMI that the transmitting element is sent includes the 7th pre-coding matrix instruction PMI₇With Eight pre-coding matrix instruction PMI₈, the PMI₇For indicating the W₃, the PMI₈For indicating the W₄ ¹。

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, when the order instruction that the processor determines is 2, the selecting unit selection

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, when the order instruction that the processor determines is 2, the processor selection

It is described

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the pre-coding matrix instruction PMI that the transmitter is sent includes the 9th pre-coding matrix instruction PMI₉With the tenth Pre-coding matrix instruction PMI₁₀, the PMI₉For indicating the W₃, the PMI₁₀For indicating the W₄ ²。

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized It is described in modeIt is describedWherein, N=2^k, the k is non-negative Integer, the A are the positive integer of N described in aliquot, and the M is positive integer less than the N, the i₁For less than（N/A-1） Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Independently of each other,For downward rounding operation symbol.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the pre-coding matrix instruction PMI that the transmitter is sent includes the 3rd pre-coding matrix instruction PMI₃With the 4th Pre-coding matrix instruction PMI₄, the PMI₃For indicating the i₁, the PMI₄For indicating the i₂And i₃, the PMI₄For The i₂And i₃Combined coding value, the PMI₄=P·i₂+i₃。

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized It is described in modeIt is describedWherein, institute State N=2^k, k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is positive integer less than the N, the i₁ For less than（N/A-1）Nonnegative integer,For downward rounding operation symbol, mod is modulo operation symbol.

With reference to the 5th aspect and its above-mentioned implementation, in another implementation of the 5th aspect, the transmitter The pre-coding matrix instruction PMI sent includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, The PMI₅For indicating the i₁, the PMI₆For indicating the i₄。

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to the 5th aspect and its above-mentioned implementation, in another implementation of the 5th aspect, the processor It is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.

With reference to any of the 5th aspect and its above-mentioned implementation implementation, another at the 5th aspect is realized In mode, the receiving terminal further includes receiver, the receiver, the reference letter sent for receiving the transmitting terminal Number；Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.

6th aspect, there is provided a kind of transmitting terminal, the transmitting terminal include：Receiver, for receiving the pre- of receiving terminal transmission Encoder matrix indicates PMI；Processor, described in the pre-coding matrix instruction PMI for being received according to the receiver is determined The pre-coding matrix W that receiving terminal is selected based on reference signal from code book, wherein, it is describedMatrix X₁It is According to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent adjacent two days in transmitting terminal first antenna group Line is for the phase difference of same transport layer transmitting signal weighting value, the θ₂Represent adjacent two in the second antenna sets of transmitting terminal Antenna launches the phase difference of signal weighting value for same transport layer, describedRepresent the first antenna group and described second Antenna sets are for the same transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, the n For the nonnegative integer less than the M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, described first Antenna sets and second antenna sets belong to same multiaerial system.

With reference to the 6th aspect, in a kind of implementation of the 6th aspect, the W is corresponding with order instruction, and the order refers to Show and correspond to the useful transmission number of plies.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode,

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.

When the order instruction is 1,

It is described

When the order instruction is 2,

It is described

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the P values are 4, and the Y1 and Y2 are respectively one kind in following column vector：

With

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the W₁To represent the matrix of the characteristic of channel in broadband, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array；Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing short-term Battle array.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the pre-coding matrix instruction PMI that the receiver receives includes the first pre-coding matrix instruction PMI₁Prelist with second Code matrix instruction PMI₂；The processor is specifically used for：According to the PMI₁Determine that the receiving terminal is based on reference signal from code book The W of middle selection₁, and according to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²；Correspondingly, institute Processor is stated to be specifically used for：According to the W₁With the W₂ ¹Determine the W, or according to the W₁With the W₂ ²Determine the W.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, when the order instruction is 1,

It is described

Alternatively,

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the P values are 4, described Y, Y₁' and Y₂' be respectively following column vector in one kind：

With

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the pre-coding matrix instruction PMI that the receiver receives includes the 7th pre-coding matrix instruction PMI₇With the 8th Pre-coding matrix instruction PMI₈；The processor is specifically used for：According to the PMI₇Determine the receiving terminal be based on reference signal from The W selected in code book₃, and according to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；Correspondingly, institute Processor is stated to be specifically used for：According to the W₃With the W₄ ¹Determine the W.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, when the order instruction is 2,

It is described

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the P values are 4, the Y₃And Y₄One kind in respectively following column vector：

With

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or institute State W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the pre-coding matrix instruction PMI that the receiver receives includes the 9th pre-coding matrix instruction PMI₉With the tenth Pre-coding matrix instruction PMI₁₀, the processor is specifically used for：According to the PMI₉Determine that the receiving terminal is based on reference signal The W selected from code book₃, and according to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；Correspondingly, The processor is specifically used for：According to the W₃With the W₄ ²Determine the W.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized It is described in modeIt is describedWherein, N=2^k, the k is non-negative Integer, the A are the positive integer of N described in aliquot, and the M is positive integer less than the N, the i₁For less than（N/A_-1）'s Nonnegative integer, the i₂And i₃It is positive integer and the i₂And i₃Independently of each other,For downward rounding operation symbol.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the pre-coding matrix instruction PMI that the receiver receives includes the 3rd pre-coding matrix instruction PMI₃Prelist with the 4th Code matrix instruction PMI₄；The processor is specifically used for：According to the PMI₃Determine the i₁, and according to the PMI₄Determine institute State i₂And i₃, wherein, the PMI₄For the i₂And i₃Combined coding value, PMI₄=P·i₂+i₃；According to the i₁、i₂And i₃Really The pre-coding matrix W that the fixed receiving terminal is selected from code book.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized It is described in modeIt is describedWherein, institute State N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is the positive integer less than the N, institute State i₁For less than（N/A-1）Nonnegative integer,For downward rounding operation symbol, mod is modulo operation symbol.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the pre-coding matrix instruction PMI that the receiver receives includes the 5th pre-coding matrix instruction PMI₅With the 6th Pre-coding matrix instruction PMI₆；The processor is specifically used for：According to the PMI₅The i indicated₁With the PMI₆Indicate The i₄Determine the W that the receiving terminal is selected from code book.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the θ₂=θ₁+ Δ θ, wherein, it is describedN=2^k, the k is nonnegative integer, and the m is less than institute State the nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；The processor is specifically used for：According to the reception The θ for the pre-coding matrix instruction PMI instructions that device receives₁Described in being selected from code book with the definite receiving terminal of Δ θ W。

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the t is -1/8, -1/16, -1/32,0,1/32,1/16 or 1/8.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the processor is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.

With reference to any of the 6th aspect and its above-mentioned implementation implementation, another at the 6th aspect is realized In mode, the transmitting terminal further includes transmitter, the transmitter, for sending the reference signal to the receiving terminal, with Toilet states the pre-coding matrix W that receiving terminal is selected based on the reference signal from code book；Wherein, the reference signal is included extremely It is one of following less：Channel state information reference signals CSI RS, demodulated reference signal DM RS, the specific reference signal of cell CRS。

Based on such scheme, user equipment selects pre-coding matrix W based on reference signal from code book, wherein,Pass through θ respectively₁And θ₂Represent the phase difference between adjacent two antennas in first antenna group and the The phase difference between adjacent two antennas in two antenna sets.In this way, it can be selected according to antenna spacer conditions suitable pre- Encoder matrix, ensures the weak dependence of antenna, and therefore, base station is selected based on what user equipment was fed back from the codebook structure of the present invention The pre-coding matrix selected carries out precoding, effectively improves the precision of precoding, so as to reduce performance loss, improves gulping down for system The amount of spitting.

Brief 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 can also be obtained according to these attached drawings Attached drawing.

Fig. 1 is the flow chart of the feedback method of the pre-coding matrix instruction of one embodiment of the invention.

Fig. 2 is the flow chart of the method for the reception pre-coding matrix instruction of another embodiment of the present invention.

Fig. 3 is the structure diagram of the receiving terminal of one embodiment of the invention.

Fig. 4 is the structure diagram of the transmitting terminal of one embodiment of the invention.

Fig. 5 is the block diagram of the equipment of one embodiment of the invention.

Fig. 6 is the structure diagram of the receiving terminal of another embodiment of the present invention.

Fig. 7 is the structure diagram of the transmitting terminal of another embodiment of the present invention.

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 of the present invention, rather than whole embodiments.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 technical scheme can be applied to various communication systems, such as：Global system for mobile telecommunications （Global System of Mobile communication, GSM）System, CDMA（Code Division Multiple Access, CDMA）System, wideband code division multiple access（Wideband Code Division Multiple Access, WCDMA）System, General Packet Radio Service（General Packet Radio Service, GPRS）, for a long time drill Into（Long Term Evolution, LTE）System, advanced Long Term Evolution（Advanced long term evolution, LTE-A）System, Universal Mobile Communication System（Universal Mobile Telecommunication System, UMTS） Deng.

It should also be understood that in embodiments of the present invention, user equipment（UE, User Equipment）Including but not limited to move Platform（MS, Mobile Station）, relaying（Relay）, mobile terminal（Mobile Terminal）, mobile phone（Mobile Telephone）, mobile phone（handset）And portable equipment（portable equipment）Deng the user's equipment can be through wireless Access net（RAN, Radio Access Network）Communicate with one or more core nets, for example, user equipment can be with It is mobile phone（Or it is " honeycomb " phone）, there is the computer etc. of wireless communication function, user equipment can also be portable Formula, pocket, hand-held, built-in computer or vehicle-mounted mobile device.

In embodiments of the present invention, base station can be the base station in GSM or CDMA（Base Transceiver Station, BTS）Or the base station in WCDMA（NodeB, NB）, can also be the evolved base station in LTE （Evolutional Node B, eNB or e-NodeB）, or relaying etc., it is of the invention not limit.

Fig. 1 is the flow chart of the feedback method of the pre-coding matrix instruction of one embodiment of the invention.This method is by receiving End performs.

101st, receiving terminal is based on reference signal, and pre-coding matrix W is selected from code book, wherein, Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, θ₁Represent adjacent two in transmitting terminal first antenna group Root antenna is for the phase difference of same transport layer transmitting signal weighting value, θ₂Represent adjacent two in the second antenna sets of transmitting terminal Antenna launches the phase difference of signal weighting value for same transport layer,Represent first antenna group and the second antenna sets for same Transport layer transmitting signal weighting value phase difference andM is positive integer, and n is the nonnegative integer less than M, in the codebook The θ of at least one pre-coding matrix₁And θ₂Differ, first antenna group and the second antenna sets belong to same multiaerial system.

102nd, receiving terminal sends pre-coding matrix instruction PMI to transmitting terminal, so that transmitting terminal obtains precoding square according to PMI Battle array W.

Multiaerial system refers to transmitting terminal（Such as base station）And receiving terminal（Such as UE）The system to be communicated by more antennas. Relative to a single aerial system, the mutiple antennas of transmitting terminal and receiving terminal can form the diversity gain or spatial multiplexing gain in space, Transmission reliability and power system capacity can effectively be improved.Diversity gain and spatial multiplexing gain can generally lead in multiaerial system The reception for crossing the method for precoding and receiving terminal of transmitting terminal merges algorithm acquisition.For example, in LTE system, transmitting terminal uses 4 Antenna, and use 2 antennas in receiving terminal.

In addition, the multiaerial system of the embodiment of the present invention can also apply the scene in multi-point joint transmission, multi-point joint Transmission refers to that multiple transmitting terminals carry out the joint transmission of signal for same user, for example, transmitting terminal A has 2 antennas, transmitting End B also has 2 antennas, and even a transmitting terminal carries out joint transmission simultaneously for receiving terminal.So the receiving terminal received signal can To regard the signal that 4 antenna base stations are sent as.

Based on such scheme, receiving terminal selects pre-coding matrix W based on reference signal from code book, wherein,θ₁And θ₂Represent that adjacent two antennas are directed to same transmission in first antenna group and the second antenna sets respectively The phase difference of layer transmitting signal weighting value.In this way, suitable pre-coding matrix can be selected according to antenna spacer conditions, ensure The weak dependence of antenna, therefore, the precoding square selected from the codebook structure of the present invention that transmitting terminal is fed back based on receiving terminal Battle array carries out precoding, effectively improves the precision of precoding, so as to reduce performance loss, improves the handling capacity of system.

For convenience, following embodiment transmitting terminals will be illustrated by taking base station as an example, receiving terminal will by taking UE as an example into Row explanation, it should be appreciated that the embodiment of the present invention does not limit this, and receiving terminal can be base station, and transmitting terminal can be UE.

It should be noted that the embodiment of the present invention is not construed as limiting the type of the reference signal in 101.For example, it may be Channel state information reference signals（Channel State Information Reference Signal, CSI RS）, demodulation Reference signal（Demodulation RS, DM RS）Or the specific reference signal of cell（Cell-specific RS, CRS）, CSI It can also include channel quality to indicate（Channel Quality Indicator/Index, abbreviation CQI）.Also need to explanation It is that UE can be notified by receiving base station（Such as wireless heterogeneous networks（Radio Resource Control, RRC）Signaling or Person's Downlink Control Information（Downlink Control Information, DCI））Or obtained based on cell ID ID with reference to letter Number resource distribution and obtain reference signal in corresponding resource or subframe.

Alternatively, in a step 101, receiving terminal can be based on reference signal and obtain channel estimation value, be estimated based on the channel Evaluation calculate channel capacity or handling capacity or string away from etc., according to the predefined criterion of receiving terminal such as channel capacity or handling capacity most The criterion or string changed greatly select pre-coding matrix away from criterion is minimized from code book.

Further, receiving terminal is also based on reference signal and determines that order instruction RI, order instruction RI correspond to useful transmission The number of plies.For example, UE can be based on reference signal port number and codebook subset limit unique value of the corresponding RI allowed Obtain RI；Or UE is based on reference signal and obtains channel estimation value, based on the channel estimation value, for each order instruction allowed RI values, and corresponding pre-coding matrix calculate channel capacity or the isocratic value of handling capacity；Selection is so that metric is optimal Order instruction RI as definite order instruction RI.In a step 101, receiving terminal can be based on reference signal, be selected from code book With the corresponding pre-coding matrix W of order instruction.Specifically, codebook subset corresponding with order instruction can be determined from code book, then Pre-coding matrix W is selected from codebook subset, pre-coding matrix W can also directly be determined by order instruction.

Alternatively, codebook subset can be predefined, or code book is reported to transmitting terminal by receiving terminal, true by transmitting terminal Determine codebook subset and notify to receiving terminal；Or determined by receiving terminal and report codebook subset, for example, codebook subset limitation can be by Base station notifies UE by high-level signaling such as RRC signaling.Alternatively, in a step 102, UE can pass through Physical Uplink Control Channel （Physical Uplink ControlChannel, PUCCH）Or Physical Uplink Shared Channel（Physical Uplink Shared Channel, PUSCH）Pre-coding matrix instruction PMI is sent to base station.It is to be understood that the embodiment of the present invention does not make this Limit.

In addition, pre-coding matrix instruction PMI and order instruction RI can be sent in identical subframe, can also be in different sons Frame is sent.

It is to be understood that matrix X₁Can also be according to θ₁And other factors（Such as amplitude）To determine, i.e. X₁It is according at least to θ₁Determine 's；Similarly, matrix X₂It is according at least to 2 Hes of θDefinite, this is not limited by the present invention.

Alternatively, as one embodiment, in a step 101, pre-coding matrix W is corresponding with order instruction, order instruction pair Should be in the useful transmission number of plies.When order instruction is greater than or equal to 2, θ₁And θ₂First antenna group and second day can be represented respectively Adjacent two antennas are directed to the phase difference of the weighted value of the transmitting signal of any one transport layer in multiple transport layers in line group.

Specifically, under the scene of 4 antennas, when order instruction is 1, pre-coding matrix can be：

Alternatively, when order instruction is 2, pre-coding matrix can be：

α and β is constant, alternatively,With

What above-mentioned example was merely exemplary, and have to limit the scope of the invention, the code book in the present invention can also be Order instruction is the code book of other values, for convenience, the code book for being 2 as 1 code book and order instruction using order instruction in the present invention Exemplified by illustrate, it should be appreciated that this is not limited by the present invention.

It should also be understood that above-mentioned code book is represented with the structure type of solid size sheet, it is of course also possible to the structure type with dicode sheet Represent, this is not limited by the present invention.

Preferably, the embodiment of the present invention is illustrated by taking the scene of 4 antennas as an example, and 4 antennas are divided into two antenna sets, every group Including two antennas.It is to be understood that the embodiment of the present invention does not limit this, for example, the embodiment of the present invention can also be applied to 8 days The scene of line.

Specifically, under the scene of 8 antennas, each antenna sets in two antenna sets can include 4 antennas,

When order instruction is 1, pre-coding matrix can be：

Alternatively, when order instruction is 2, pre-coding matrix can be：

For convenience of description, following examples will be illustrated by taking 4 antenna scenes as an example.

Alternatively, in an implementation mode, by taking order instruction is 1 and 2 as an example, when order instruction is 1, pre-coding matrix：

When order instruction is 2, pre-coding matrix：

Wherein,

Y1 and Y2 is vectorial for mutually independent P × 1 dimension column selection, N=2^k, k is nonnegative integer, and m is non-negative whole less than N Number, P are the positive integer less than N.That is N is 2 power, can be using value as 0,2,4,8 ..., etc., m ∈ { 0,1 ..., N-1 }, P ∈{0,1,…,N-1}。

For example, k values are 4, i.e. N=16, m ∈ { 0,1 ..., N-1 }={ 0,1 ..., 15 }, P=4, Y1 and Y2 can be respectively One kind in following column vector：

With

I.e.：Y1 and Y2 can be identical or different.

Assuming thatI.e.For（5）The first row of matrix X in formula, it is assumed thatI.e.For（5）Formula The secondary series of middle matrix X.

Alternatively, in a step 102, receiving terminal can send the first pre-coding matrix instruction PMI to transmitting terminal₁With second Pre-coding matrix instruction PMI₂, i.e. pre-coding matrix instruction PMI includes PMI₁And PMI₂.Further, with it is identical or different when Between the cycle send PMI₁And PMI₂.Wherein, PMI₁For indicating W₁, PMI₂For indicating W₂ ¹Or W₂ ².In other words, PMI₁And PMI₂ Can have identical or different time-domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.

Alternatively, W₁To represent the matrix of the characteristic of channel in broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array, or W₁To represent the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing short-term.W₂In on The value of target digital representation order.Correspondingly, receiving terminal can send PMI to transmitting terminal at larger time intervals₁, with shorter Time interval to transmitting terminal send PMI₂。

Certainly, receiving terminal can directly indicate selected pre-coding matrix W by a PMI, for example, code book shares 256 pre-coding matrixes, when the PMI that receiving terminal is sent is 0, the 1st into transmitting terminal 256 pre-coding matrixes of instruction is pre- Encoder matrix, when the PMI that receiving terminal is sent is 1, the 2nd precoding square in 256 pre-coding matrixes is indicated to transmitting terminal Battle array ..., i.e. the value 0-255 of PMI correspond to corresponding pre-coding matrix in 256 pre-coding matrixes respectively.It is to be understood that this Inventive embodiments are not construed as limiting the mode of receiving terminal instruction pre-coding matrix.

Alternatively, receiving terminal can send pre-coding matrix by physical control channel or Physical Shared Channel to transmitting terminal Indicate PMI.For example, UE can send pre-coding matrix by Physical Uplink Control Channel or Physical Uplink Shared Channel to base station Indicate PMI.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Therefore, by column selection vector of the embodiment of the present invention Y1 and Y2 independently in matrix X select one arrange to Amount, so as to ensure that the weak dependence of the corresponding code book of larger spacing antenna.

Alternatively, under another implementation, θ₁And θ₂Value, which can be distinguished, is：

Wherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N（For example, N=16, A=2）, M is less than N just Integer, i₁For less than（N/A-1）Nonnegative integer, i₂And i₃It is positive integer and i₂And i₃Independently of each other,For downward rounding Oeprator.That is N is 2 power, can be using value as 0,2,4,8 ..., etc., P ∈ { 0,1 ..., N-1 }, i₁∈{0,1,…, N/A-1}。

Alternatively, in a step 102, receiving terminal can send the 3rd pre-coding matrix instruction PMI to transmitting terminal₃With the 4th Pre-coding matrix instruction PMI₄, i.e. pre-coding matrix instruction PMI includes PMI₃And PMI₄.Further, with it is identical or different when Between the cycle send PMI₃And PMI₄.Wherein, PMI₃For indicating i₁, PMI₄For indicating i₂And i₃.Specifically, PMI₄Can be i₂ And i₃Combined coding value.Transmitting terminal can pass through PMI₄Value and i₂And i₃Correspondence determine i₂And i₃.For example, transmitting terminal PMI can be pre-set₄And i₂Correspondence, passes through PMI₄Value determine i₂, further according to relational expression PMI₄=P·i₂+i₃Determine i₃； Similarly, transmitting terminal can pre-set PMI₄And i₃Correspondence, passes through PMI₄Value determine i₃, further according to relational expression PMI₄= P·i₂+i₃Determine i₂。

In other words, PMI₃And PMI₄Can have different time-domains or frequency domain granularity.Certainly, receiving terminal can lead to Cross a PMI and directly indicate selected pre-coding matrix W.Specific embodiment may be referred to above-described embodiment, herein not Repeat again.

It is to be understood that the embodiment of the present invention is not construed as limiting the mode of receiving terminal instruction pre-coding matrix.

Alternatively, receiving terminal can send pre-coding matrix by physical control channel or Physical Shared Channel to transmitting terminal Indicate PMI.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Therefore, the embodiment of the present invention can pass through i according to the current characteristic of channel₂And i₃Selection θ independently₁And θ₂, It ensure that the weak dependence of the corresponding code book of larger spacing antenna.

Alternatively, under another implementation, θ₁And θ₂Value, which can also be distinguished, is：

Wherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N, and P is the positive integer less than N, i₁For less than（N/ A-1）Nonnegative integer, i₄For less than（PM-1）Positive integer（Such as P=4, M=4, i₄<15）,Accorded with for downward rounding operation Number, mod is modulo operation symbol.That is N is 2 power, can be using value as 0,2,4,8 ..., etc., P ∈ { 0,1 ..., N-1 }, i₁∈{0,1,…,N/A-1}。

Alternatively, in a step 102, receiving terminal can send the 5th pre-coding matrix instruction PMI to transmitting terminal₅With the 6th Pre-coding matrix instruction PMI₆, i.e. pre-coding matrix instruction PMI includes PMI₅And PMI₆.Further, with it is identical or different when Between the cycle send PMI₅And PMI₆.Wherein, PMI₅For indicating i₁, PMI₆For indicating i₄.In other words, PMI₅And PMI₆Can be with With different time-domains or frequency domain granularity.Certainly, receiving terminal can directly indicate selected precoding by a PMI Matrix W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Therefore, the embodiment of the present invention can pass through i according to the current characteristic of channel₄Determine θ₁And θ₂, selected precoding θ in matrix₁And θ₂Can be identical or different, it ensure that the weak dependence of the corresponding code book of larger spacing antenna.

θ₂=θ₁+Δθ（11）

Wherein, N=2^k, k is nonnegative integer, and m is the nonnegative integer less than N, and the absolute value of Δ θ=2 π t, t are less than 1, for example, T is 1/8, -1/16, -1/32,0,1/32,1/16 or 1/8 etc..

In a step 101, receiving terminal can be according to θ₁With the selection of Δ θ（Such as the current characteristic of channel）From code book Select pre-coding matrix W.

Similarly, in a step 102, receiving terminal can send two pre-coding matrix instructions to transmitting terminal, indicate respectively θ₁With Δ θ.It is further possible to two pre-coding matrix instructions are sent with the identical or different time cycle, in other words Say, which can have different time-domains or frequency domain granularity.Certainly, receiving terminal can pass through one A PMI directly indicates selected pre-coding matrix W.Specific embodiment may be referred to above-described embodiment, no longer superfluous herein State.

Therefore, the embodiment of the present invention can pass through θ according to the current characteristic of channel₁And θ₂Between phase deviation Δ θ, can Providing Δ θ in limited excursion, ensure that the weak dependence of the corresponding code book of larger spacing antenna.

Alternatively, under another implementation, by taking order instruction is 1 and 2 as an example, when order instruction is 1, precoding square Battle array：

Alternatively,

Wherein,Be integer, can continuously value or discontinuous value, Y, Y₁' And Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and P is just whole less than N Number.That is N is 2 power, can be using value as 0,2,4,8 ..., etc., m1 ∈ { 0,1 ..., N-1 }, P ∈ { 0,1 ..., N-1 }. For example, k values are 4, i.e. N=16, m1 ∈ { 0,1 ..., N-1 }={ 0,1 ..., 15 }, α are constant, and θ ' is real number.

Alternatively, P=4, Y, Y₁' and Y₂' can be respectively one kind in following column vector：

With

I.e.：

Alternatively, in a step 102, receiving terminal can send the 7th pre-coding matrix instruction PMI to transmitting terminal₇With the 8th Pre-coding matrix instruction PMI₈, i.e. pre-coding matrix instruction PMI includes PMI₇And PMI₈.Further, with it is identical or different when Between the cycle send PMI₇And PMI₈.Wherein, PMI₇For indicating W₃, PMI₈For indicating W₄ ¹.In other words, PMI₇And PMI₈Can be with With identical or different time-domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.

Alternatively, W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹To represent the matrix of the characteristic of channel of subband, or W₃To represent the matrix of the long-term characteristic of channel, W₄ ¹To represent the matrix of the short-term characteristic of channel.Correspondingly, receiving terminal can be with Longer time interval sends PMI to transmitting terminal₇, PMI is sent to transmitting terminal with shorter time interval₈。

When order instruction is 2, pre-coding matrix：

Wherein,Be integer, can continuously value or discontinuous value, Y₃And Y₄ Be P ×¹Tie up column selection vector, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and P is the positive integer less than N.That is N For 2 power, can be using value as 0,2,4,8 ..., etc., m1 ∈ { 0,1 ..., N-1 }, P ∈ { 0,1 ..., N-1 }.For example, k Value is 4, i.e. N=16, m1 ∈ { 0,1 ..., N-1 }={ 0,1 ..., 15 }, and β is constant, and θ ' is real number.

Alternatively, when order instruction is 2, pre-coding matrix can also be：

In above formula（16）In, θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are directed to two transport layers In first transport layer transmitting signal weighting value phase difference, θ₂Specific adjacent two days represented in the second antenna sets of transmitting terminal Line is for the phase difference of first transport layer transmitting signal weighting value in two transport layers, θ₃Represent transmitting terminal first antenna group In adjacent two antennas for the phase difference of the weighted value of second transport layer transmitting signal in two transport layers, and θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights.Also, above formula（16）In D, Y₃, Y₄WithSo that in codebook set in any one pre-coding matrix Two row are mutually orthogonal.

Wherein, when order is 2, Y₃And Y₄Can be identical or different, the embodiment of the present invention does not limit this.

It is pointed out that θ ' can take any real number, the embodiment of the present invention does not limit the value of θ ', for example, θ ' Value can be 0 or 2 π integral multiple, for example,θ ' can be positive number and not be the integral multiple of 2 π, can be with Be negative and be 2 π integral multiple.For example,OrL is positive integer and is not N Integral multiple.

Alternatively, P=4, Y₃And Y₄It can be respectively one kind in following column vector：

With

I.e.：

Alternatively, in a step 102, receiving terminal can send the 9th pre-coding matrix instruction PMI to transmitting terminal₉With the tenth Pre-coding matrix instruction PMI₁₀, i.e. pre-coding matrix instruction PMI includes PMI₉And PMI₁₀.Further, with identical or different Time cycle sends PMI₉And PMI₁₀.Wherein, PMI₉For indicating W₃, PMI₁₀For indicating W₄ ².In other words, PMI₉And PMI₁₀ Can have identical or different time-domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.

Alternatively, W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband, or Person W₃To represent the matrix of the long-term characteristic of channel, W₄ ²To represent the matrix of the short-term characteristic of channel.Correspondingly, receiving terminal can be with At larger time intervals PMI is sent to transmitting terminal₉, PMI is sent to transmitting terminal with shorter time interval₁₀。

Certainly, receiving terminal can directly indicate selected pre-coding matrix W by a PMI.Specific embodiment Above-described embodiment is may be referred to, details are not described herein again.

Therefore, by the selection of θ ' in the embodiment of the present invention, so as to ensure that the weak of the corresponding code book of larger spacing antenna Correlation.

It is pointed out that represent above-mentioned code book with other equivalent matrixes（Or pre-coding matrix）Mode both fall within this The scope of invention.For example, the pre-coding matrix by the pre-coding matrix W in the embodiment of the present invention after row or column displacement The scope of the present invention is also fallen into, such as different antenna number will correspondingly result in pre-coding matrix line replacement.

Fig. 2 is the flow chart of the method for precoding of another embodiment of the present invention.The method of Fig. 2 is performed by transmitting terminal, and It is corresponding with the method for Fig. 1, therefore will suitably omission and the embodiment repetitive description of Fig. 1.

201, transmitting terminal receives the pre-coding matrix instruction PMI that receiving terminal is sent.

202, it is pre- that transmitting terminal according to pre-coding matrix instruction PMI determines that receiving terminal is selected based on reference signal from code book Encoder matrix W, wherein,Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, θ₁Represent adjacent two antennas in transmitting terminal first antenna group for the phase difference of same transport layer transmitting signal weighting value, θ₂ Represent phase difference of adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting signal weighting value, First antenna group and the second antenna sets are represented for the phase difference of same transport layer transmitting signal weighting value andM is Positive integer, n are the θ of the nonnegative integer, in the codebook at least one pre-coding matrix less than M₁And θ₂Differ, first antenna Group and the second antenna sets belong to same multiaerial system.

Based on such scheme, transmitting terminal receives the pre-coding matrix instruction PMI that receiving terminal is sent, according to the pre-coding matrix Instruction PMI determines that receiving terminal selects pre-coding matrix W based on reference signal from code book, wherein,θ₁With θ₂Represent that adjacent two antennas are for same transport layer transmitting signal weighting value in first antenna group and the second antenna sets respectively Phase difference.In this way, suitable pre-coding matrix can be selected according to antenna spacer conditions, ensure the weak dependence of antenna, because This, transmitting terminal carries out precoding based on the pre-coding matrix selected from the codebook structure of the present invention that receiving terminal is fed back, effectively Ground improves the precision of precoding, so as to reduce performance loss, improves the handling capacity of system.

Alternatively, reference signal in step 202 can be that CSI RS, DM RS or CRS, CSI can also include channel Quality indicator (CQI).It should also be noted that, UE can be notified by receiving base station（Such as RRC signaling or DCI）Or it is based on Cell ID ID obtains the resource distribution of reference signal and obtains reference signal in corresponding resource or subframe.

Alternatively, in step 201, transmitting terminal can receive receiving terminal by physical control channel or Physical Shared Channel The pre-coding matrix instruction PMI of transmission.Refer to for example, base station can receive the pre-coding matrix that UE is sent by PUCCH or PUSCH Show PMI.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Preferably, the embodiment of the present invention applies the scene of 4 antennas, and 4 antennas are divided into two antenna sets, and every group includes two days Line.It is to be understood that the embodiment of the present invention does not limit this, for example, the embodiment of the present invention can also be applied to the scene of 8 antennas, 8 Pre-coding matrix form under antenna scene may be referred to above-mentioned, and details are not described herein again.For convenience of description, following examples will be with 4 Illustrated exemplified by antenna scene.

It is to be understood that matrix X₁Can also be according to θ₁Determined with other factors such as amplitude, i.e. X₁It is according at least to θ₁Determine 's；Similarly, matrix X₂It is according at least to θ₂WithDefinite, this is not limited by the present invention.

Alternatively, as one embodiment, pre-coding matrix W is corresponding with order instruction, and order instruction corresponds to useful biography The defeated number of plies, the order instruction can determine by receiving terminal, and specific example refers to above-mentioned, and details are not described herein again.Specifically, at 4 days Under the scene of line, the pre-coding matrix that order instruction is 1 can be above-mentioned（1）Formula；Alternatively, the pre-coding matrix that order instruction is 2 can To be above-mentioned（2）Formula.

Alternatively, in an implementation mode, in step 202, by taking order instruction is 1 and 2 as an example, when order instruction is 1, The pre-coding matrix that transmitting terminal determines can be above-mentioned（3）Formula；Alternatively, when order instruction is 2, precoding square that transmitting terminal determines Battle array can be above-mentioned（4）Formula.

With

I.e.：Y1 and Y2 can be identical or different.

Assuming thatI.e.To be above-mentioned（5）The first row of matrix X in formula, it is assumed thatI.e.For It is above-mentioned（5）The secondary series of matrix X in formula.

Alternatively, in step 201, transmitting terminal receives the first pre-coding matrix instruction PMI that receiving terminal is sent₁With second Pre-coding matrix instruction PMI₂, pre-coding matrix instruction PMI includes PMI₁And PMI₂.Further, with the identical or different time Cycle receives the PMI that receiving terminal is sent₁And PMI₂.In other words, PMI₁And PMI₂Can have identical or different time-domain or Frequency domain granularity（Either based on different period of sub-frame or subband size）.In step 202, transmitting terminal is according to PMI₁Determine The W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₂Determine the W that UE is selected from code book₂ ¹Or W₂ ², Transmitting terminal can be according to W₁And W₂ ¹Determine pre-coding matrix W, or according to W₁And W₂ ²Determine pre-coding matrix W.

Alternatively, W₁To represent the matrix of the characteristic of channel in broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array, W₂In upper target digital representation order value；Or W₁To represent the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is to represent The matrix of the short-term characteristic of channel.Correspondingly, transmitting terminal can receive the PMI of receiving terminal transmission at larger time intervals₁, with Shorter time interval receives the PMI that receiving terminal is sent₂。

Certainly, transmitting terminal can directly determine selected pre-coding matrix W, example by the PMI that receiving terminal is sent Such as, code book shares 256 pre-coding matrixes, and when the PMI that transmitting terminal receives receiving terminal transmission is 0, transmitting terminal determines to receive Hold selection is the 1st pre-coding matrix in 256 pre-coding matrixes of code book, when transmitting terminal receives receiving terminal transmission When PMI is 1, what transmitting terminal determined receiving terminal selection is the 2nd pre-coding matrix ... ... in 256 pre-coding matrixes of code book, That is the value 0-255 of PMI correspond to corresponding pre-coding matrix in 256 pre-coding matrixes respectively.It is to be understood that the present invention is implemented Example is not construed as limiting the mode of UE instruction pre-coding matrixes.

Alternatively, transmitting terminal can receive the precoding that receiving terminal is sent by physical control channel or Physical Shared Channel Matrix indicates PMI.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Alternatively, under another implementation, θ₁And θ₂Value, which can be distinguished, isWithWherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N（For example, N=16, A=2）, M is small In the positive integer of N, i₁For less than（N/A-1）Nonnegative integer, i₂And i₃It is positive integer and i₂And i₃Independently of each other,For to Lower rounding operation symbol.That is N is 2 power, can be using value as 0,2,4,8 ..., etc., P ∈ { 0,1 ..., N-1 }, i₁∈ {0,1,…,N/A-1}。

Alternatively, in step 201, transmitting terminal receives the 3rd pre-coding matrix instruction PMI that receiving terminal is sent₃With the 4th Pre-coding matrix instruction PMI₄, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₃And PMI₄。 In step 202, transmitting terminal is according to PMI₃Determine i₁, according to PMI₄Determine i₂And i₃.Specifically, PMI₄Can be i₂And i₃Connection Compile in collaboration with code value.Transmitting terminal can pass through PMI₄Value and i₂And i₃Correspondence determine i₂And i₃.For example, transmitting terminal can be advance PMI is set₄And i₂Correspondence, passes through PMI₄Value determine i₂, further according to relational expression PMI₄=P·i₂+i₃Determine i₃；Similarly, Transmitting terminal can pre-set PMI₄And i₃Correspondence, passes through PMI₄Value determine i₃, further according to relational expression PMI₄=P·i₂+i₃ Determine i₂。

In other words, PMI₃And PMI₄Can have different time-domains or frequency domain granularity.Certainly, transmitting terminal can lead to A PMI for crossing receiving terminal transmission directly determines selected pre-coding matrix W.Specific embodiment may be referred to above-mentioned reality Example is applied, details are not described herein again.

Alternatively, under another implementation, θ₁And θ₂Value, which can also be distinguished, is WithWherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N, and P is Positive integer less than N, i₁For less than（N/A-1）Nonnegative integer, i₄For less than（PM-1）Positive integer（Such as P=4, M=4, i4< 15）,For downward rounding operation symbol, mod is modulo operation symbol.That is N be 2 power, can using value as 0,2,4, 8 ..., etc., P ∈ { 0,1 ..., N-1 }, i₁∈{0,1,…,N/A-1}。

Alternatively, in step 201, transmitting terminal receives the 5th pre-coding matrix instruction PMI that receiving terminal is sent₅With the 6th Pre-coding matrix instruction PMI₆, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₅And PMI₆。 In step 202, according to PMI₅Determine i₁, according to PMI₆Determine i₄.In other words, PMI₅And PMI₆There can be the different time Domain or frequency domain granularity.Certainly, transmitting terminal can directly determine selected precoding square by the PMI that receiving terminal is sent Battle array W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Alternatively, under another implementation, θ 1 and θ 2 can also distinguish value and beAnd θ₂=θ₁+Δθ。 Wherein, N=2^k, k is nonnegative integer, and m is the nonnegative integer less than N, and the absolute value of Δ θ=2 π t, t are less than 1, for example, t is 1/8 ,- 1/16th, -1/32,0,1/32,1/16 or 1/8 etc..

Similarly, in step 201, transmitting terminal can receive two pre-coding matrix instructions of receiving terminal transmission, this two A pre-coding matrix instruction indicates respectively θ₁With Δ θ.It is further possible to received with the identical or different time cycle Two pre-coding matrix instructions sent are held, in other words, which there can be the different time Domain or frequency domain granularity.Transmitting terminal can pass through θ₁Pre-coding matrix W is determined with Δ θ；Certainly, transmitting terminal can pass through receiving terminal The PMI sent directly determines the selected pre-coding matrix W of receiving terminal.Specific embodiment may be referred to above-mentioned implementation Example, details are not described herein again.

Alternatively, in an implementation mode, in step 202, when order instruction is 1, precoding that transmitting terminal determines Matrix can be above-mentioned（12）Or（13）Formula.

Similarly, in step 201, transmitting terminal can receive receiving terminal transmission two pre-coding matrix instructions, the 7th Pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, which indicates respectively PMI₇With PMI₈, it is further possible to which two pre-coding matrixes that receiving terminal transmission is received with the identical or different time cycle refer to Show, in other words, which can have different time-domains or frequency domain granularity.In step 202, Transmitting terminal is according to PMI₇Determine the W that receiving terminal is selected based on reference signal from code book₃, and according to PMI₈Determine UE from code book The W of selection₄ ¹, transmitting terminal can be according to W₃And W₄ ¹Determine pre-coding matrix W.

When order instruction is 2, the pre-coding matrix that transmitting terminal determines can be above-mentioned（14）Or（16）Formula.

Similarly, in step 201, transmitting terminal can receive receiving terminal transmission two pre-coding matrix instructions, the 9th Pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, which indicates respectively PMI₉With PMI₁₀, it is further possible to which two pre-coding matrixes that receiving terminal transmission is received with the identical or different time cycle refer to Show, in other words, which can have different time-domains or frequency domain granularity.In step 202, Transmitting terminal is according to PMI₉Determine the W that receiving terminal is selected based on reference signal from code book₃, and according to PMI₁₀Determine UE from code book The W of selection₄ ², transmitting terminal can be according to W₃And W₄ ²Determine pre-coding matrix W.

Certainly, the PMI that transmitting terminal can be sent by receiving terminal directly determines the selected precoding square of receiving terminal Battle array W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Fig. 3 is the structure diagram of the receiving terminal of one embodiment of the invention.Receiving terminal 300 includes selecting unit 301 and hair Send unit 302.

Selecting unit 301, for based on reference signal, pre-coding matrix W to be selected from code book, wherein,Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, θ₁Represent transmitting terminal first Adjacent two antennas in antenna sets are for the phase difference of same transport layer transmitting signal weighting value, θ₂Represent transmitting terminal second day Adjacent two antennas in line group launch the phase difference of signal weighting value for same transport layer,Represent first antenna group and the Two antenna sets for same transport layer transmitting signal weighting value phase difference andM is positive integer, and n is non-less than M The θ of negative integer, in the codebook at least one pre-coding matrix₁And θ₂Differ, first antenna group and the second antenna sets belong to same One multiaerial system.

Transmitting element 302, for sending pre-coding matrix instruction PMI to transmitting terminal, so that transmitting terminal determines to select according to PMI Select the pre-coding matrix W of the selection of unit 301.

Multiaerial system refers to the system that transmitting terminal and receiving terminal are communicated by more antennas.Relative to single antenna system The mutiple antennas of system, transmitting terminal and receiving terminal can form the diversity gain or spatial multiplexing gain in space, can effectively improve Transmission reliability and power system capacity.Diversity gain and spatial multiplexing gain generally can prelisting by transmitting terminal in multiaerial system The reception of code method and receiving terminal merges algorithm and obtains.For example, in LTE system, transmitting terminal uses 4 antennas, and is receiving End uses 2 antennas.

Transmitting terminal of the embodiment of the present invention can be base station, and correspondingly, receiving terminal can be UE；Or transmitting terminal can be UE, correspondingly, receiving terminal can be base stations.It is to be understood that the embodiment of the present invention does not limit this.

Receiving terminal 300 can realize each step of receiving terminal involved in Fig. 1 to the method for Fig. 2, to avoid repeating, no longer in detail Thin description.

Alternatively, determination unit 303 can also be included as one embodiment, receiving terminal 300, determination unit 303, is used for Order instruction is determined based on reference signal, order instruction corresponds to the useful transmission number of plies.Selecting unit 301 is specifically used for：Based on ginseng Signal is examined, the corresponding pre-coding matrix W of order instruction that selection is determined with determination unit 303 from code book.

Specifically, when the order instruction that determination unit 303 determines is 1, the pre-coding matrix that selecting unit 301 selects can be with It is above-mentioned（1）Formula；Alternatively, when the order instruction that determination unit 303 determines is 2, the pre-coding matrix that selecting unit 301 selects can To be above-mentioned（2）Formula.

Alternatively, in an implementation mode, by taking order instruction is 1 and 2 as an example, when the order instruction that determination unit 303 determines For 1 when, selecting unit 301 select pre-coding matrix can be above-mentioned（3）Formula；Alternatively, when the order that determination unit 303 determines refers to When being shown as 2, the pre-coding matrix that selecting unit 301 selects can be above-mentioned（4）Formula.Specific example may be referred to it is above-mentioned, herein Repeat no more.

Alternatively, W₁To represent the matrix of the characteristic of channel in broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for representing subband Battle array, W₂In upper target digital representation order value；Or W₁To represent the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is to represent The matrix of the short-term characteristic of channel.

Alternatively, the pre-coding matrix instruction PMI that transmitting element 302 is sent can include the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂, PMI₁For indicating W₁, PMI₂For indicating W₂ ¹Or W₂ ².Correspondingly, transmitting terminal can To receive the PMI of the transmission of transmitting element 302 at larger time intervals₁, transmitting element 302 is received with shorter time interval and is sent out The PMI sent₂。

Alternatively, under another implementation, when the order instruction that determination unit 303 determines is 1, selecting unit 301 The pre-coding matrix of selection can be above-mentioned（12）Or（13）Formula, specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹To represent the matrix of the characteristic of channel of subband, or W₃To represent the matrix of the long-term characteristic of channel, W₄ ¹To represent the matrix of the short-term characteristic of channel.

Alternatively, the pre-coding matrix instruction PMI that transmitting element 302 is sent can include the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, PMI₇For indicating W₃, PMI₈For indicating W₄ ¹.In other words, PMI₇And PMI₈ Can have identical or different time-domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.Phase Ying Di, transmitting terminal can receive the PMI of the transmission of transmitting element 302 at larger time intervals₇, received with shorter time interval The PMI that transmitting element 302 is sent₈。

Alternatively, under another implementation, when the order instruction that determination unit 303 determines is 2, selecting unit 301 The pre-coding matrix of selection can be above-mentioned（14）Or（16）Formula, specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband, or Person W₃To represent the matrix of the long-term characteristic of channel, W₄ ²To represent the matrix of the short-term characteristic of channel.

Alternatively, the pre-coding matrix instruction PMI that transmitting element 302 is sent can include the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, PMI₉For indicating W₃, PMI₁₀For indicating W₄ ².Correspondingly, transmitting terminal can be with The PMI that transmitting element 302 is sent is received at larger time intervals₉, transmitting element 302 is received with shorter time interval and is sent PMI₁₀。

Alternatively, the pre-coding matrix instruction PMI that transmitting element 302 is sent can include the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄, PMI₃For indicating i₁, PMI₄For indicating i₂And i₃, specifically, PMI₄Can be i₂And i₃Combined coding value.Transmitting terminal can pass through PMI₄Value and i₂And i₃Correspondence determine i₂And i₃.For example, transmitting End can pre-set PMI₄And i₂Correspondence, passes through PMI₄Value determine i₂, further according to relational expression PMI₄=P·i₂+i₃Determine i₃；Similarly, transmitting terminal can pre-set PMI₄And i₃Correspondence, passes through PMI₄Value determine i₃, further according to relational expression PMI₄=P·i₂+i₃Determine i₂。

Alternatively, the pre-coding matrix instruction PMI that transmitting element 302 is sent can include the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅For indicating i₁, PMI₆For indicating i₄。

Alternatively, under another implementation, θ₁And θ₂Value, which can also be distinguished, isAnd θ₂=θ₁+Δθ.Its In, N=2^k, k is nonnegative integer, and m is the nonnegative integer less than N, and the absolute value of Δ θ=2 π t, t are less than 1, for example, t is 1/8, -1/ 16th, -1/32,0,1/32,1/16 or 1/8 etc..

Alternatively, can be also used for as another embodiment, selecting unit 301：According to the numbering of antenna to precoding Matrix W carries out line replacement or column permutation.

Alternatively, as another embodiment, receiving terminal 300 can also include receiving unit 304, and receiving unit 304, is used In the reference signal for receiving transmitting terminal transmission.It is true that determination unit 303 is specifically used for the reference signal based on the reception of receiving unit 304 Determine order instruction；Alternatively, selecting unit 301 is specifically used for the reference signal received based on receiving unit 304, selected from code book pre- Encoder matrix W.Wherein, reference signal includes at least one of following：CSI RS, DM RS or CRS etc..

Fig. 4 is the structure diagram of the transmitting terminal of one embodiment of the invention.The transmitting terminal 400 of Fig. 4 includes receiving unit 401 With determination unit 402.

Receiving unit 401, for receiving the pre-coding matrix instruction PMI of receiving terminal transmission.

Determination unit 402, the pre-coding matrix instruction PMI for being received according to receiving unit 401 determine that receiving terminal is based on The pre-coding matrix W that reference signal is selected from code book, wherein,Matrix X₁It is according to θ₁Definite, square Battle array X₂It is according to θ₂WithDefinite, θ₁Represent that adjacent two antennas in transmitting terminal first antenna group are sent out for same transport layer Penetrate the phase difference of signal weighting value, θ₂Represent that adjacent two antennas in the second antenna sets of transmitting terminal are launched for same transport layer The phase difference of signal weighting value,Represent first antenna group and the second antenna sets for same transport layer transmitting signal weighting value Phase difference andM is positive integer, and n is the nonnegative integer less than M, in the codebook at least one pre-coding matrix θ₁And θ₂Differ, first antenna group and the second antenna sets belong to same multiaerial system.

Transmitting terminal 400 can realize each step of transmitting terminal involved in Fig. 1 to the method for Fig. 2, to avoid repeating, no longer in detail Thin description.

Alternatively, as one embodiment, pre-coding matrix W is corresponding with order instruction, and order instruction corresponds to useful biography The defeated number of plies.

Specifically, order instruction is that 1 code book can be above-mentioned（1）Formula；Alternatively, the code book that order instruction is 2 can be above-mentioned （2）Formula.

Code book in the present invention can also be the code book that order instruction is other values, for convenience, with order in the present invention Be designated as 1 code book and order instruction be 2 code book exemplified by illustrate, it should be appreciated that this is not limited by the present invention.

Alternatively, in an implementation mode, by taking order instruction is 1 and 2 as an example, when order instruction is 1, determination unit 402 Definite pre-coding matrix can be above-mentioned（3）Formula；Alternatively, when order instruction is 2, the definite precoding square of determination unit 402 Battle array can be above-mentioned（4）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving can prelist including first Code matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂.Alternatively, PMI₁And PMI₂When can have identical or different Between domain or frequency domain granularity（Either based on different period of sub-frame or subband size）, receiving unit 401 can be specifically used for The PMI that receiving terminal is sent is received at larger time intervals₁, with the PMI of shorter time interval reception receiving terminal transmission₂.Determine Unit 402 can be specifically used for：According to PMI₁Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₂ Determine the W that receiving terminal is selected from code book₂ ¹Or W₂ ².Correspondingly, determination unit 402 can also be specifically used for：According to W₁And W₂ ¹Really Determine pre-coding matrix W, or according to W₁And W₂ ²Determine pre-coding matrix W.

Certainly, determination unit 402 can be specifically used for one sent by receiving terminal received by receiving unit 401 PMI directly determines selected pre-coding matrix W, for example, code book shares 256 pre-coding matrixes, when receiving unit 401 receives When the PMI sent to receiving terminal is 0, what determination unit 402 determined receiving terminal selection is the in 256 pre-coding matrixes of code book 1 pre-coding matrix, when the PMI that receiving unit 401 receives receiving terminal transmission is 1, determination unit 402 determines that receiving terminal selects What is selected is the 2nd pre-coding matrix ... ... in 256 pre-coding matrixes of code book, i.e. the value 0-255 of PMI correspond to respectively Corresponding pre-coding matrix in 256 pre-coding matrixes.It is to be understood that mode of the embodiment of the present invention to UE instruction pre-coding matrixes It is not construed as limiting.

Alternatively, the receiving unit 401 of transmitting terminal 400 can be connect by physical control channel or Physical Shared Channel The pre-coding matrix instruction PMI that receiving end is sent.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Alternatively, under another implementation, when order instruction is 1, the definite pre-coding matrix of determination unit 402 can Think above-mentioned（12）Or（13）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving can prelist including the 7th Code matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈.Alternatively, PMI₇And PMI₈When can have identical or different Between domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.Receiving unit 401 can be specifically used for The PMI that receiving terminal is sent is received at larger time intervals₇, with the PMI of shorter time interval reception receiving terminal transmission₈.Determine Unit 402 can be specifically used for：According to PMI₇Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₈ Determine the W that receiving terminal is selected from code book₄ ¹.Correspondingly, determination unit 402 can also be specifically used for：According to W₁And W₄ ¹Determine pre- Encoder matrix W.

Alternatively, under another implementation, when order instruction is 2, the definite pre-coding matrix of determination unit 402 can Think above-mentioned（14）Or（16）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving can prelist including the 9th Code matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀.Receiving unit 401 can be specifically used between longer time Every the PMI for receiving receiving terminal transmission₉, with the PMI of shorter time interval reception receiving terminal transmission₁₀.Determination unit 402 can have Body is used for：According to PMI₉Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₁₀Determine receiving terminal from The W selected in code book₄ ².Correspondingly, determination unit 402 can also be specifically used for：According to W₁And W₄ ²Determine pre-coding matrix W.

Alternatively, receiving unit 401 can be specifically used for receiving the 3rd pre-coding matrix instruction PMI that receiving terminal is sent₃ With the 4th pre-coding matrix instruction PMI₄, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₃With PMI₄.Determination unit 402 can be specifically used for according to PMI₃Determine i₁, according to PMI₄Determine i₂And i₃.Specifically, PMI₄Can be i₂And i₃Combined coding value, PMI₄=P·i₂+i₃.Determination unit 402 can be specifically used for passing through PMI₄Value and i₂And i₃Pair It should be related to definite i₂And i₃。

In other words, PMI₃And PMI₄Can have different time-domains or frequency domain granularity.Certainly, determination unit 402 can Directly to determine selected precoding square specifically for the PMI sent by receiving terminal received by receiving unit 401 Battle array W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Alternatively, under another implementation, θ₁And θ₂Value, which can also be distinguished, is WithWherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N, and P is Positive integer less than N, i₁For less than（N/A-1）Nonnegative integer, i₄For less than（PM-1）Positive integer（Such as P=4, M=4, i₄< 15）,For downward rounding operation symbol, mod is modulo operation symbol.That is N be 2 power, can using value as 0,2,4, 8 ..., etc., P ∈ { 0,1 ..., N-1 }, i₁∈{0,1,…,N/A-1}。

Alternatively, receiving unit 401 can be specifically used for receiving the 5th pre-coding matrix instruction PMI that receiving terminal is sent₅ With the 6th pre-coding matrix instruction PMI₆, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₅With PMI₆.Determination unit 402 can be specifically used for according to PMI₅Determine i₁, according to PMI₆Determine i₄.In other words, PMI₅And PMI₆Can With with different time-domains or frequency domain granularity.Certainly, determination unit 402 can be specifically used for connecing by receiving unit 401 The PMI sent by receiving terminal received directly determines selected pre-coding matrix W.Specific embodiment may be referred to Embodiment is stated, details are not described herein again.

Similarly, receiving unit 401 can be specifically used for receiving two pre-coding matrix instructions that receiving terminal is sent, this two A pre-coding matrix instruction indicates respectively θ₁With Δ θ.It is further possible to received with the identical or different time cycle Two pre-coding matrix instructions sent are held, in other words, which there can be the different time Domain or frequency domain granularity.Determination unit 402 can be specifically used for passing through θ₁Pre-coding matrix W is determined with Δ θ.Certainly, determine single The PMI sent by receiving terminal that member 402 can be specifically used for receiving by receiving unit 401 directly determines selected pre- Encoder matrix W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Alternatively, can be also used for as another embodiment, determination unit 402：According to the numbering of antenna to precoding Matrix W carries out line replacement or column permutation.

Alternatively, transmitting element 403 can also be included as another embodiment, transmitting terminal 400, transmitting element 403 is used In to receiving terminal send reference signal, the pre-coding matrix W selected so as to receiving terminal based on reference signal from code book.Wherein, Reference signal includes at least one of following：CSI RS, DM RS or CRS etc..

The embodiment of the present invention further provides the device embodiment for realizing each step and method in above method embodiment.Figure 5 show a kind of embodiment of equipment, and in this embodiment, equipment 500 includes processor 501, memory 502, transmitter 503 With receiver 504.The operation of 501 control device 500 of processor, processor 501 can also be known as CPU（Central Processing Unit, central processing unit）.Memory 502 can include read-only storage and random access memory, and Instruction and data is provided to processor 501.The a part of of memory 502 can also include non-volatile row random access memory （NVRAM）.Processor 501, memory 502, transmitter 503 and receiver 504 are coupled by bus system 55, wherein Bus system 510 further includes power bus, controlling bus and status signal bus in addition in addition to including data/address bus.But in order to For the sake of clear explanation, various buses are all designated as bus system 510 in figure.

The method that the embodiments of the present invention disclose can apply above-mentioned equipment 500.Wherein, processor 501 is probably A kind of IC chip, has the disposal ability of signal.During realization, each step of the above method can pass through processing The integrated logic circuit of hardware in device 501 or the instruction of software form are completed.

Further, Fig. 6 is the structure diagram of the receiving terminal of another embodiment of the present invention.Receiving terminal 600 includes processing Device 601 and transmitter 602.

Processor 601, for based on reference signal, pre-coding matrix W to be selected from code book, wherein,Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, θ₁Represent transmitting terminal first Adjacent two antennas in antenna sets are for the phase difference of same transport layer transmitting signal weighting value, θ₂Represent transmitting terminal second day Adjacent two antennas in line group launch the phase difference of signal weighting value for same transport layer,Represent first antenna group and Second antenna sets for same transport layer transmitting signal weighting value phase difference andM is positive integer, and n is less than M's The θ of nonnegative integer, in the codebook at least one pre-coding matrix₁And θ₂Differ, first antenna group and the second antenna sets belong to Same multiaerial system.

Transmitter 602, for sending pre-coding matrix instruction PMI to transmitting terminal, so that transmitting terminal determines to handle according to PMI The pre-coding matrix W that device 601 selects.

Receiving terminal 600 can realize each step of receiving terminal involved in Fig. 1 to the method for Fig. 2, to avoid repeating, no longer in detail Thin description.

Alternatively, as one embodiment, processor 601 can be also used for determining order instruction based on reference signal, and order refers to Show and correspond to the useful transmission number of plies.Processor 601 is specifically used for：Based on reference signal, selection and order instruction phase from code book Corresponding pre-coding matrix W.

Specifically, when the definite order instruction of processor 601 is 1, the pre-coding matrix that processor 601 selects can be above-mentioned （1）Formula；Alternatively, when the order instruction that processor 601 determines is 2, the pre-coding matrix that processor 601 selects can be above-mentioned（2） Formula.

Alternatively, in an implementation mode, by taking order instruction is 1 and 2 as an example, when the order instruction that processor 601 determines is 1 When, the pre-coding matrix that processor 601 selects can be above-mentioned（3）Formula；Alternatively, when the order instruction that processor 601 determines is 2 When, the pre-coding matrix that processor 601 selects can be above-mentioned（4）Formula.Specific example may be referred to it is above-mentioned, it is no longer superfluous herein State.

Alternatively, the pre-coding matrix instruction PMI that transmitter 602 is sent can include the first pre-coding matrix instruction PMI₁ With the second pre-coding matrix instruction PMI₂, PMI₁For indicating W₁, PMI₂For indicating W₂ ¹Or W₂ ²。

Alternatively, under another implementation, when the order instruction that processor 601 determines is 1, processor 601 selects Pre-coding matrix can be above-mentioned（12）Or（13）Formula, specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that transmitter 602 is sent can include the 7th pre-coding matrix instruction PMI₇ With the 8th pre-coding matrix instruction PMI₈, PMI₇For indicating W₃, PMI₈For indicating W₄ ¹.In other words, PMI₇And PMI₈Can be with With identical or different time-domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.Accordingly Ground, transmitting terminal can at larger time intervals receiver transmitter 602 send PMI₇, received and sent with shorter time interval The PMI that device 602 is sent₈。

Alternatively, under another implementation, when the order instruction that processor 601 determines is 2, processor 601 selects Pre-coding matrix can be above-mentioned（14）Or（16）Formula, specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that transmitter 602 is sent can include the 9th pre-coding matrix instruction PMI₉ With the tenth pre-coding matrix instruction PMI₁₀, PMI₉For indicating W₃, PMI₁₀For indicating W₄ ².Correspondingly, transmitting terminal can with compared with The PMI that long time interval receiver transmitter 602 is sent₉, with the PMI of the shorter transmission of time interval receiver transmitter 602₁₀。

Alternatively, the pre-coding matrix instruction PMI that transmitter 602 is sent can include the 3rd pre-coding matrix instruction PMI₃ With the 4th pre-coding matrix instruction PMI₄, PMI₃For indicating i₁, PMI₄For indicating i₂And i₃, specifically, PMI₄Can be i₂With i₃Combined coding value.Transmitting terminal can pass through PMI₄Value and i₂And i₃Correspondence determine i₂And i₃.For example, transmitting terminal can To pre-set PMI₄And i₂Correspondence, passes through PMI₄Value determine i₂, further according to relational expression PMI₄=P·i₂+i₃Determine i₃；Class As, transmitting terminal can pre-set PMI₄And i₃Correspondence, passes through PMI₄Value determine i₃, further according to relational expression PMI₄=P· i₂+i₃Determine i₂。

Alternatively, the pre-coding matrix instruction PMI that transmitter 602 is sent can include the 5th pre-coding matrix instruction PMI₅ With the 6th pre-coding matrix instruction PMI₆, the PMI₅For indicating i₁, PMI₆For indicating i₄。

Alternatively, can be also used for as another embodiment, processor 601：According to the numbering of antenna to precoding square Battle array W carries out line replacement or column permutation.

Alternatively, receiver 603, receiver 603, for connecing can also be included as another embodiment, receiving terminal 600 Receive the reference signal that transmitting terminal is sent.Processor 602 is specifically used for determining that order refers to based on the reference signal that receiver 603 receives Show；Alternatively, processor 6021 is specifically used for the reference signal received based on receiver 603, pre-coding matrix is selected from code book W.Wherein, reference signal includes at least one of following：CSI RS, DM RS or CRS etc..

Fig. 7 is the structure diagram of the transmitting terminal of another embodiment of the present invention.The transmitting terminal 700 of Fig. 7 includes receiver 701 With processor 702.

Receiver 701, for receiving the pre-coding matrix instruction PMI of receiving terminal transmission.

Processor 702, the pre-coding matrix instruction PMI for being received according to receiver 701 determine that receiving terminal is based on reference The pre-coding matrix W that signal is selected from code book, wherein,Matrix X₁It is according to θ₁Definite, matrix X₂ It is according to θ₂WithDefinite, θ₁Represent adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting letter The phase difference of number weighted value, θ₂Represent adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting signal The phase difference of weighted value,Represent the phase of first antenna group and the second antenna sets for same transport layer transmitting signal weighting value Difference andM is positive integer, and n is the θ of the nonnegative integer, in the codebook at least one pre-coding matrix less than M₁With θ₂Differ, first antenna group and the second antenna sets belong to same multiaerial system.

Transmitting terminal 700 can realize each step of transmitting terminal involved in Fig. 1 to the method for Fig. 2, to avoid repeating, no longer in detail Thin description.

Alternatively, in an implementation mode, by taking order instruction is 1 and 2 as an example, when order instruction is 1, processor 702 is true Fixed pre-coding matrix can be above-mentioned（3）Formula；Alternatively, when order instruction is 2, the definite pre-coding matrix of processor 702 can Think above-mentioned（4）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving can include the first precoding Matrix indicates PMI₁With the second pre-coding matrix instruction PMI₂.Alternatively, PMI₁And PMI₂There can be the identical or different time Domain or frequency domain granularity（Either based on different period of sub-frame or subband size）, receiver 701 can be specifically used for compared with Long time interval receives the PMI that receiving terminal is sent₁, with the PMI of shorter time interval reception receiving terminal transmission₂.Processor 702 can be specifically used for：According to PMI₁Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₂Determine The W that receiving terminal is selected from code book₂ ¹Or W₂ ².Correspondingly, processor 702 can also be specifically used for：According to W₁And W₂ ¹Determine to prelist Code matrix W, or according to W₁And W₂ ²Determine pre-coding matrix W.

Certainly, the PMI sent by receiving terminal that processor 702 can be specifically used for receiving by receiver 701 is straight Definite selected pre-coding matrix W is met, for example, code book shares 256 pre-coding matrixes, when receiver 701 receives reception When the PMI that end is sent is 0, what processor 702 determined receiving terminal selection is that the 1st in 256 pre-coding matrixes of code book prelists Code matrix, when the PMI that receiver 701 receives receiving terminal transmission is 1, what processor 702 determined receiving terminal selection is code book The 2nd pre-coding matrix ... ... in 256 pre-coding matrixes, i.e. the value 0-255 of PMI correspond to 256 precodings respectively Corresponding pre-coding matrix in matrix.It is to be understood that the embodiment of the present invention is not construed as limiting the mode of UE instruction pre-coding matrixes.

Alternatively, the receiver 701 of transmitting terminal 700 can be received by physical control channel or Physical Shared Channel Hold the pre-coding matrix instruction PMI sent.It is to be understood that the embodiment of the present invention is not construed as limiting this.

Alternatively, under another implementation, when order instruction is 1, the definite pre-coding matrix of processor 702 can be with To be above-mentioned（12）Or（13）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving can include the 7th precoding Matrix indicates PMI₇With the 8th pre-coding matrix instruction PMI₈.Alternatively, PMI₇And PMI₈There can be the identical or different time Domain or frequency domain granularity（Either based on different period of sub-frame or subband size）.Receiver 701 can be specifically used for compared with Long time interval receives the PMI that receiving terminal is sent₇, with the PMI of shorter time interval reception receiving terminal transmission₈.Processor 702 can be specifically used for：According to PMI₇Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₈Determine The W that receiving terminal is selected from code book₄ ¹.Correspondingly, processor 702 can also be specifically used for：According to W₁And W₄ ¹Determine precoding square Battle array W.

Alternatively, under another implementation, when order instruction is 2, the definite pre-coding matrix of processor 702 can be with To be above-mentioned（14）Or（16）Formula.Specific example may be referred to above-mentioned, and details are not described herein again.

Alternatively, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving can include the 9th precoding Matrix indicates PMI₉With the tenth pre-coding matrix instruction PMI₁₀.Receiver 701 can be specifically used for connecing at larger time intervals Receive the PMI that receiving terminal is sent₉, with the PMI of shorter time interval reception receiving terminal transmission₁₀.Processor 702 can be used specifically In：According to PMI₉Determine the W that receiving terminal is selected based on reference signal from code book₁, and according to PMI₁₀Determine receiving terminal from code book The W of middle selection₄ ².Correspondingly, processor 702 can also be specifically used for：According to W₁And W₄ ²Determine pre-coding matrix W.

Therefore, by θ in the embodiment of the present invention+selection, so as to ensure that the weak of the corresponding code book of larger spacing antenna Correlation.

Alternatively, receiver 701 can be specifically used for receiving the 3rd pre-coding matrix instruction PMI that receiving terminal is sent₃With 4th pre-coding matrix instruction PMI₄, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₃With PMI₄.Processor 702 can be specifically used for according to PMI₃Determine i₁, according to PMI₄Determine i₂And i₃.Specifically, PMI₄Can be i₂ And i₃Combined coding value, PMI₄=P·i₂+i₃.Processor 702 can be specifically used for passing through PMI₄Value and i₂And i₃Correspondence Relation determines i₂And i₃。

In other words, PMI₃And PMI₄Can have different time-domains or frequency domain granularity.Certainly, processor 702 can be with Selected pre-coding matrix W is directly determined specifically for the PMI sent by receiving terminal received by receiver 701. Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Alternatively, receiver 701 can be specifically used for receiving the 5th pre-coding matrix instruction PMI that receiving terminal is sent₅With 6th pre-coding matrix instruction PMI₆, further, the PMI of receiving terminal transmission is received with the identical or different time cycle₅With PMI₆.Processor 702 can be specifically used for according to PMI₅Determine i₁, according to PMI₆Determine i₄.In other words, PMI₅And PMI₆Can be with With different time-domains or frequency domain granularity.Certainly, processor 702 can be specifically used for by receiver 701 receive by The PMI that receiving terminal is sent directly determines selected pre-coding matrix W.Specific embodiment may be referred to above-mentioned implementation Example, details are not described herein again.

Similarly, two pre-coding matrix instructions that receiver 701 can be sent specifically for receiving receiving terminal, this two Pre-coding matrix instruction indicates respectively θ₁With Δ θ.It is further possible to receiving terminal is received with the identical or different time cycle Two pre-coding matrix instructions sent, in other words, which can have different time-domains Or frequency domain granularity.Processor 702 can be specifically used for passing through θ₁Pre-coding matrix W is determined with Δ θ.Certainly, processor 702 can Directly to determine selected pre-coding matrix specifically for the PMI sent by receiving terminal received by receiver 701 W.Specific embodiment may be referred to above-described embodiment, and details are not described herein again.

Alternatively, can be also used for as another embodiment, processor 702：According to the numbering of antenna to precoding square Battle array W carries out line replacement or column permutation.

Alternatively, as another embodiment, transmitting terminal 700 can also include transmitter 703, transmitter 703 be used for Receiving terminal sends reference signal, the pre-coding matrix W selected so as to receiving terminal based on reference signal from code book.Wherein, refer to Signal includes at least one of following：CSI RS, DM RS or CRS etc..

Those of ordinary skill in the art may realize that each exemplary list described with reference to the embodiments described herein Member and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually Performed with hardware or software mode, application-specific and design constraint depending on technical solution.Professional technician Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of 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, can be with Realize by another way.For example, device embodiment described above is only schematical, 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 when actually realizing Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit Close or communicate to connect, can be electrical, machinery 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 with positioned at a place, or can also be distributed to multiple In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units integrate in a unit.

If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment（Can be People's computer, server, or network equipment etc.）Perform all or part of step of each embodiment the method for the present invention. And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（ROM, Read-Only Memory）, arbitrary access deposits Reservoir（RAM, Random Access Memory）, magnetic disc or CD etc. are various can be with the medium of store program codes.

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 the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention answers the scope of the claims of being subject to.

Claims

A kind of 1. feedback method of pre-coding matrix instruction, it is characterised in that including：

Receiving terminal is based on reference signal, and pre-coding matrix W is selected from code book, wherein, it is describedMatrix X₁ It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent adjacent two in transmitting terminal first antenna group Antenna is for the phase difference of same transport layer transmitting signal weighting value, the θ₂Represent adjacent two in the second antenna sets of transmitting terminal Root antenna launches the phase difference of signal weighting value for same transport layer, describedRepresent the first antenna group and described second Antenna sets are for the same transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, the n For the nonnegative integer less than the M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, described first Antenna sets and second antenna sets belong to same multiaerial system；

The receiving terminal sends pre-coding matrix instruction PMI to the transmitting terminal, so that the transmitting terminal is determined according to the PMI The W.
2. the method as described in claim 1, it is characterised in that the method further includes：

The receiving terminal determines order instruction based on the reference signal, and the order instruction corresponds to the useful transmission number of plies；

The receiving terminal is based on reference signal, selects pre-coding matrix W to include from code book：

The receiving terminal is based on the reference signal, selection and the corresponding W of the order instruction from code book.
3. method as claimed in claim 2, it is characterised in that

It is described when the order instruction is 1Or

It is described when the order instruction is 2

Wherein, the α and β is constant.
4. method as claimed in claim 3, it is characterised in that

When the order instruction is 1,

It is described

When the order instruction is 2,

It is described

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, N=2^k, k is nonnegative integer, and m is the nonnegative integer less than N, and the P is the positive integer less than N.
5. method as claimed in claim 4, it is characterised in that the P values are 4, the Y₁And Y₂Respectively following column vector In one kind：

With
6. method as described in claim 4 or 5, it is characterised in that the W₁To represent the matrix of the characteristic of channel in broadband, W₂ ¹ And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
7. method as described in claim 4 or 5, it is characterised in that the pre-coding matrix instruction PMI includes the first precoding Matrix indicates PMI₁With the second pre-coding matrix instruction PMI₂, the PMI₁For indicating the W₁, the PMI₂For indicating State W₂ ¹Or W₂ ²。
8. method as claimed in claim 2, it is characterised in that when the order instruction is 1,

It is described

Alternatively,

Wherein,n₁, n₂..., n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
9. method as claimed in claim 8, it is characterised in that the P values are 4, described Y, Y₁' and Y₂' it is respectively following row One kind in vector：With
10. method as claimed in claim 8 or 9, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
11. method as claimed in claim 8 or 9, it is characterised in that the pre-coding matrix instruction PMI prelists including the 7th Code matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, the PMI₇For indicating the W₃, the PMI₈For indicating The W₄ ¹。
12. method as claimed in claim 2, it is characterised in that when the order instruction is 2,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
13. method as claimed in claim 2, it is characterised in that when the order instruction is 2,

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_PIt is Integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding square in codebook set Two in battle array arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
14. the method as described in claim 12 or 13, it is characterised in that the P values are 4, the Y₃And Y₄It is respectively following One kind in column vector：

With
15. the method as described in claim 12 or 13, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
16. the method as described in claim 12 or 13, it is characterised in that it is pre- that the pre-coding matrix instruction PMI includes the 9th Encoder matrix indicates PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the PMI₉For indicating the W₃, the PMI₁₀For Indicate the W₄ ²。
17. such as claim 1-3 any one of them methods, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Mutually solely It is vertical,For downward rounding operation symbol.
18. method as claimed in claim 17, it is characterised in that the pre-coding matrix instruction PMI includes the 3rd precoding Matrix indicates PMI₃With the 4th pre-coding matrix instruction PMI₄, the PMI₃For indicating the i₁, the PMI₄For indicating State i₂And i₃, the PMI₄For the i₂And i₃Combined coding value, PMI₄=Pi₂+i₃。
19. such as claim 1-3 any one of them methods, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operator Number.
20. method as claimed in claim 19, it is characterised in that the pre-coding matrix instruction PMI includes the 5th precoding Matrix indicates PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅For indicating the i₁, the PMI₆For indicating State i₄。
21. such as claim 1-3 any one of them methods, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.
22. method as claimed in claim 21, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32,1/16 Or 1/8.
23. such as claim 1-5 any one of them methods, it is characterised in that reference signal is based in the receiving terminal, from code After selecting pre-coding matrix W in this, the method further includes：

The receiving terminal carries out line replacement or column permutation according to the numbering of antenna to the W.
24. such as claim 1-5 any one of them methods, it is characterised in that reference signal is based in the receiving terminal, from code Before selecting pre-coding matrix W in this, the method further includes：

The receiving terminal receives the reference signal that the transmitting terminal is sent；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.
A kind of 25. method for receiving pre-coding matrix instruction, it is characterised in that including：

Transmitting terminal receives the pre-coding matrix instruction PMI that receiving terminal is sent；

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, wherein,Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDetermine , the θ₁Represent phase of adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting signal weighting value Potential difference, the θ₂Represent adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting signal weighting value Phase difference, it is describedRepresent the first antenna group and second antenna sets for same transport layer transmitting signal weighting value Phase difference andM is positive integer, and n is the nonnegative integer less than M, at least one precoding square in the code book The θ of battle array₁And θ₂Differ, the first antenna group and second antenna sets belong to same multiaerial system.
26. method as claimed in claim 25, it is characterised in that the W is corresponding with order instruction, and the order instruction corresponds to The useful transmission number of plies.
27. method as claimed in claim 26, it is characterised in that

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.
28. method as claimed in claim 27, it is characterised in that

When the order instruction is 1, the pre-coding matrix

When the order instruction is 2, the pre-coding matrix

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and the P is less than the N just Integer.
29. method as claimed in claim 28, it is characterised in that the P values are 4, the Y₁And Y₂Respectively it is following arrange to One kind in amount：

With
30. the method as described in claim 28 or 29, it is characterised in that the W₁To represent the matrix of the characteristic of channel in broadband, The W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
31. the method as described in claim 28 or 29, it is characterised in that it is pre- that the pre-coding matrix instruction PMI includes first Encoder matrix indicates PMI₁With the second pre-coding matrix instruction PMI₂；

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, including：

The transmitting terminal is according to the PMI₁Determine the W that the receiving terminal is selected based on reference signal from code book₁, and root According to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²；

Correspondingly, the transmitting terminal is according to the W₁With the W₂ ¹Determine the W, or according to the W₁With the W₂ ²Determine institute State W.
32. method as claimed in claim 26, it is characterised in that when the order instruction is 1,

It is described

Alternatively,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
33. method as claimed in claim 32, it is characterised in that the P values are 4, described Y, Y₁' and Y₂' respectively following One kind in column vector：

With
34. the method as described in claim 32 or 33, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
35. the method as described in claim 32 or 33, it is characterised in that it is pre- that the pre-coding matrix instruction PMI includes the 7th Encoder matrix indicates PMI₇With the 8th pre-coding matrix instruction PMI₈,

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, including：

The transmitting terminal is according to the PMI₇Determine the W that the receiving terminal is selected based on reference signal from code book₃, and root According to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；

Correspondingly, the transmitting terminal is according to the W₃With the W₄ ¹Determine the W.
36. method as claimed in claim 26, it is characterised in that when the order instruction is 2,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
37. method as claimed in claim 26, it is characterised in that when the order instruction is 2,

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_PIt is Integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding square in codebook set Two in battle array arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
38. the method as described in claim 36 or 37, it is characterised in that the P values are 4, the Y₃And Y₄It is respectively following One kind in column vector：

With
39. the method as described in claim 36 or 37, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
40. the method as described in claim 36 or 37, it is characterised in that it is pre- that the pre-coding matrix instruction PMI includes the 9th Encoder matrix indicates PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the transmitting terminal is according to the pre-coding matrix instruction PMI Determine the pre-coding matrix W that the receiving terminal is selected based on reference signal from code book, including：

The transmitting terminal is according to the PMI₉Determine the W that the receiving terminal is selected based on reference signal from code book₃, and root According to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；

Correspondingly, the transmitting terminal is according to the W₃With the W₄ ²Determine the W.
41. such as claim 25-27 any one of them methods, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Mutually solely It is vertical,For downward rounding operation symbol.
42. method as claimed in claim 41, it is characterised in that the pre-coding matrix instruction PMI includes the 3rd precoding Matrix indicates PMI₃With the 4th pre-coding matrix instruction PMI₄；

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, including：

The transmitting terminal is according to the PMI₃Determine the i₁, and according to the PMI₄Determine the i₂And i₃, wherein, the PMI₄ For the i₂And i₃Combined coding value, the PMI₄=Pi₂+i₃；

The transmitting terminal is according to the i₁、i₂And i₃Determine the pre-coding matrix W that the receiving terminal is selected from code book.
43. such as claim 25-27 any one of them methods, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N just Integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operation symbol.
44. method as claimed in claim 43, it is characterised in that the pre-coding matrix instruction PMI includes the 5th precoding Matrix indicates PMI₅With the 6th pre-coding matrix instruction PMI₆；

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, including：

The transmitting terminal is according to the PMI₅The i indicated₁With the PMI₆The i indicated₄Determine the receiving terminal from code The pre-coding matrix W selected in this.
45. such as claim 25-27 any one of them methods, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；

The transmitting terminal determines that the receiving terminal is selected based on reference signal from code book according to the pre-coding matrix instruction PMI Pre-coding matrix W, including：

The θ that the transmitting terminal is indicated according to the pre-coding matrix instruction PMI₁With the definite receiving terminal of Δ θ from code book The pre-coding matrix W of middle selection.
46. method as claimed in claim 45, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32,1/16 Or 1/8.
47. such as claim 25-29 any one of them methods, it is characterised in that in the transmitting terminal according to the precoding After matrix instruction PMI determines the pre-coding matrix W that the receiving terminal is selected based on reference signal from code book, the method is also Including：

The transmitting terminal carries out line replacement or column permutation according to the numbering of antenna to the W.
48. such as claim 25-29 any one of them methods, it is characterised in that receive receiving terminal in the transmitting terminal and send Pre-coding matrix instruction PMI before, the method further includes：

The transmitting terminal sends the reference signal to the receiving terminal, so that the receiving terminal is based on the reference signal from code The pre-coding matrix W selected in this；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.
49. a kind of receiving terminal, including：

Selecting unit, for based on reference signal, pre-coding matrix W to be selected from code book, wherein, it is describedMatrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent transmitting terminal Adjacent two antennas in first antenna group are for the phase difference of same transport layer transmitting signal weighting value, the θ₂Represent transmitting Phase difference of adjacent two antennas in the second antenna sets for same transport layer transmitting signal weighting value is held, it is describedRepresent institute First antenna group and second antenna sets are stated for the phase difference of same transport layer transmitting signal weighting value and describedM is positive integer, and n is the nonnegative integer less than M, the θ of at least one pre-coding matrix in the code book₁And θ₂ Differ, the first antenna group and second antenna sets belong to same multiaerial system；

Transmitting element, for sending pre-coding matrix instruction PMI to the transmitting terminal, so that the transmitting terminal is according to the PMI Determine the W of the selecting unit selection.
50. receiving terminal as claimed in claim 49, it is characterised in that the receiving terminal further includes determination unit,

The determination unit, for determining order instruction based on the reference signal, the order instruction corresponds to useful transport layer Number；

The selecting unit is specifically used for：Based on the reference signal, the institute that selection is determined with the determination unit from code book State the corresponding pre-coding matrix W of order instruction.
51. receiving terminal as claimed in claim 50, it is characterised in that

When the order instruction that the determination unit determines is 1,

The selecting unit selectionOr

When the order instruction that the determination unit determines is 2,

The selecting unit selection

Wherein, the α and β is constant.
52. receiving terminal as claimed in claim 51, it is characterised in that

When the order instruction that the determination unit determines is 1, the selecting unit selects described

When the order instruction that the determination unit determines is 2, the selecting unit selection

It is described

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, the N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and the P is less than the N Positive integer.
53. receiving terminal as claimed in claim 52, it is characterised in that the P values are 4, the Y₁And Y₂Respectively following row One kind in vector：

With
54. the receiving terminal as described in claim 52 or 53, it is characterised in that the W₁To represent the square of the characteristic of channel in broadband Battle array, the W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
55. the receiving terminal as described in claim 52 or 53, it is characterised in that the pre-coding matrix that the transmitting element is sent refers to Show that PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂, the PMI₁It is described for indicating W₁, the PMI₂For indicating the W₂ ¹Or W₂ ²。
56. receiving terminal as claimed in claim 50, it is characterised in that

When the order instruction that the determination unit determines is 1, the selecting unit selection

It is described

Alternatively,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
57. receiving terminal as claimed in claim 56, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
58. the receiving terminal as described in claim 56 or 57, it is characterised in that the precoding square that the transmitting element is sent Battle array instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, the PMI₇For indicating State W₃, the PMI₈For indicating the W₄ ¹。
59. receiving terminal as claimed in claim 50, it is characterised in that

When the order instruction that the determination unit determines is 2, the selecting unit selection

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
60. receiving terminal as claimed in claim 59, it is characterised in that

When the order instruction that the determination unit determines is 2, the selecting unit selection

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_PIt is Integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding square in codebook set Two in battle array arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
61. receiving terminal as claimed in claim 60, it is characterised in that the P values are 4, the Y₃And Y₄Respectively following row One kind in vector：

With
62. such as the receiving terminal any one of claim 59-61, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
63. such as the receiving terminal any one of claim 59-61, it is characterised in that the transmitting element is sent described Pre-coding matrix instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the PMI₉ For indicating the W₃, the PMI₁₀For indicating the W₄ ²。
64. such as claim 49-51 any one of them receiving terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Mutually solely It is vertical,For downward rounding operation symbol.
65. the receiving terminal as described in claim 64, it is characterised in that the pre-coding matrix instruction that the transmitting element is sent PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄, the PMI₃For indicating the i₁, The PMI₄For indicating the i₂And i₃, the PMI₄For the i₂And i₃Combined coding value, the PMI₄=Pi₂+i₃。
66. such as claim 49-51 any one of them receiving terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N just Integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operation symbol.
67. the receiving terminal as described in claim 66, it is characterised in that the pre-coding matrix instruction that the transmitting element is sent PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅For indicating the i₁, The PMI₆For indicating the i₄。
68. such as claim 49-51 any one of them receiving terminals, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.
69. receiving terminal as recited in claim 68, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32,1/ 16 or 1/8.
70. such as claim 49-53 any one of them receiving terminals, it is characterised in that

The selecting unit is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.
71. such as claim 49-53 any one of them receiving terminals, it is characterised in that the receiving terminal further includes receiving unit,

The receiving unit, the reference signal sent for receiving the transmitting terminal；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.
A kind of 72. transmitting terminal, it is characterised in that including：

Receiving unit, for receiving the pre-coding matrix instruction PMI of receiving terminal transmission；

Determination unit, the pre-coding matrix instruction PMI for being received according to the receiving unit determine the reception end group In the pre-coding matrix W that reference signal is selected from code book, wherein, it is describedMatrix X₁It is according to θ₁Really Fixed, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent adjacent two antennas in transmitting terminal first antenna group for same One transport layer launches the phase difference of signal weighting value, the θ₂Represent that adjacent two antennas in the second antenna sets of transmitting terminal are directed to The phase difference of same transport layer transmitting signal weighting value, it is describedRepresent that the first antenna group and second antenna sets are directed to The phase difference of same transport layer transmitting signal weighting value and describedThe M is positive integer, and the n is less than the M Nonnegative integer, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and described Second antenna sets belong to same multiaerial system.
73. the transmitting terminal as described in claim 72, it is characterised in that the W is corresponding with order instruction, and the order instruction corresponds to In the useful transmission number of plies.
74. the transmitting terminal as described in claim 73, it is characterised in that

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.
75. the transmitting terminal as described in claim 74, it is characterised in that

When the order instruction is 1, the pre-coding matrix

When the order instruction is 2, the pre-coding matrix

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, the N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and the P is less than the N Positive integer.
76. the transmitting terminal as described in claim 75, it is characterised in that the P values are 4, the Y₁And Y₂Respectively following row One kind in vector：

With
77. the transmitting terminal as described in claim 75 or 76, it is characterised in that the W₁To represent the square of the characteristic of channel in broadband Battle array, the W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
78. the transmitting terminal as described in claim 75 or 76, it is characterised in that the precoding square that the receiving unit receives Battle array instruction PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂；

The determination unit is specifically used for：According to the PMI₁Determine what the receiving terminal was selected based on reference signal from code book The W₁, and according to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²；

Correspondingly, the determination unit is specifically used for：According to the W₁With the W₂ ¹Determine the W, or according to the W₁And institute State W₂ ²Determine the W.
79. the transmitting terminal as described in claim 73, it is characterised in that when the order instruction is 1,

It is described

Alternatively,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
80. the transmitting terminal as described in claim 79, it is characterised in that the P values are 4, described Y, Y₁' and Y₂' be respectively under One kind in row column vector：

With
81. the transmitting terminal as described in claim 79 or 80, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
82. the transmitting terminal as described in claim 79 or 80, it is characterised in that the precoding square that the receiving unit receives Battle array instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈；

The determination unit is specifically used for：According to the PMI₇Determine what the receiving terminal was selected based on reference signal from code book The W₃, and according to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；

Correspondingly, the determination unit is specifically used for：According to the W₃With the W₄ ¹Determine the W.
83. the transmitting terminal as described in claim 73, it is characterised in that when the order instruction is 2,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
84. the transmitting terminal as described in claim 73, it is characterised in that when the order instruction is 2,

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_PIt is Integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding square in codebook set Two in battle array arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
85. the transmitting terminal as described in claim 83 or 84, it is characterised in that the P values are 4, the Y₃And Y₄Under respectively One kind in row column vector：

With
86. the transmitting terminal as described in claim 83 or 84, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
87. the transmitting terminal as described in claim 83 or 84, it is characterised in that the precoding square that the receiving unit receives Battle array instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀,

The determination unit is specifically used for：According to the PMI₉Determine what the receiving terminal was selected based on reference signal from code book The W₃, and according to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；

Correspondingly, the determination unit is specifically used for：According to the W₃With the W₄ ²Determine the W.
88. such as claim 72-74 any one of them transmitting terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Independently of each otherFor downward rounding operation symbol.
89. the transmitting terminal as described in claim 88, it is characterised in that the pre-coding matrix instruction PMI prelists including the 3rd Code matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄；

The determination unit is specifically used for：

According to the PMI₃Determine the i₁, and according to the PMI₄Determine the i₂And i₃, wherein, the PMI₄For the i₂With i₃Combined coding value, PMI₄=Pi₂+i₃；

According to the i₁、i₂And i₃Determine the pre-coding matrix W that the receiving terminal is selected from code book.
90. such as claim 72-74 any one of them transmitting terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operator Number.
91. the transmitting terminal as described in claim 90, it is characterised in that the pre-coding matrix that the receiving unit receives refers to Show that PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆；

The determination unit is specifically used for：

According to the PMI₅The i indicated₁With the PMI₆The i indicated₄Determine what the receiving terminal was selected from code book Pre-coding matrix W.
92. such as claim 72-74 any one of them transmitting terminals, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；

The determination unit is specifically used for：

The θ indicated according to the pre-coding matrix instruction PMI₁Selected with the definite receiving terminal of Δ θ from code book pre- Encoder matrix W.
93. the transmitting terminal as described in claim 92, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32,1/ 16 or 1/8.
94. such as claim 72-76 any one of them transmitting terminals, it is characterised in that

The determination unit is additionally operable to：

Line replacement or column permutation are carried out to the W according to the numbering of antenna.
95. such as claim 72-76 any one of them transmitting terminals, it is characterised in that the transmitting terminal further includes transmitting element：

The transmitting element, for sending the reference signal to the receiving terminal, so that the receiving terminal is based on the reference The pre-coding matrix W that signal is selected from code book；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.
96. a kind of receiving terminal, including：

Processor, for based on reference signal, pre-coding matrix W to be selected from code book, wherein, it is described Matrix X₁It is according to θ₁Definite, matrix X₂It is according to θ₂WithDefinite, the θ₁Represent the phase in transmitting terminal first antenna group Adjacent two antennas are for the phase difference of same transport layer transmitting signal weighting value, the θ₂Represent in the second antenna sets of transmitting terminal Adjacent two antennas launch the phase difference of signal weighting value for same transport layer, describedRepresent the first antenna group and institute The second antenna sets are stated for the same transport layer transmitting phase difference of signal weighting value and describedM is positive integer, and n is Nonnegative integer less than M, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group Belong to same multiaerial system with second antenna sets；

Transmitter, for sending pre-coding matrix instruction PMI to the transmitting terminal, so that the transmitting terminal is true according to the PMI The W of the fixed processor selection.
97. the receiving terminal as described in claim 96, it is characterised in that

The processor is additionally operable to：Order instruction is determined based on the reference signal, the order instruction corresponds to useful transport layer Number；

The processor is specifically used for：Based on the reference signal, selected from code book corresponding with the definite order instruction The W.
98. the receiving terminal as described in claim 97, it is characterised in that

When the order instruction that the processor determines is 1, the processor selection

It is describedOr

When the order instruction that the processor determines is 2, the processor selection

It is described

Wherein, the α and β is constant.
99. the receiving terminal as described in claim 98, it is characterised in that

When the order instruction that the processor determines is 1, the processor selection

It is described

When the order instruction that the processor determines is 2, the processor selection

It is described

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, the N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and the P is less than the N Positive integer.
100. the receiving terminal as described in claim 99, it is characterised in that the P values are 4, the Y₁And Y₂It is respectively following One kind in column vector：

With
101. the receiving terminal as described in claim 99 or 100, it is characterised in that the W₁To represent the characteristic of channel in broadband Matrix, the W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
102. the receiving terminal as described in claim 99 or 100, it is characterised in that the pre-coding matrix that the transmitter is sent refers to Show that PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂, the PMI₁It is described for indicating W₁, the PMI₂For indicating the W₂ ¹Or W₂ ²。
103. the receiving terminal as described in claim 102, it is characterised in that

When the order instruction that the processor determines is 1, the selecting unit selection

It is described

Alternatively,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
104. the receiving terminal as described in claim 103, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
105. the receiving terminal as described in claim 103 or 104, it is characterised in that the described of transmitting element transmission prelists Code matrix instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, the PMI₇For referring to Show the W₃, the PMI₈For indicating the W₄ ¹。
106. the receiving terminal as described in claim 97, it is characterised in that

When the order instruction that the processor determines is 2, the selecting unit selection

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
107. the receiving terminal as described in claim 106, it is characterised in that

When the order instruction that the processor determines is 2, the processor selection

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_PIt is Integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding square in codebook set Two in battle array arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
108. the receiving terminal as described in claim 107, it is characterised in that the P values are 4, the Y₃And Y₄It is respectively following One kind in column vector：

With
109. such as the receiving terminal any one of claim 106-108, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
110. such as the receiving terminal any one of claim 106-108, it is characterised in that the transmitter is sent described Pre-coding matrix instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, the PMI₉ For indicating the W₃, the PMI₁₀For indicating the W₄ ²。
111. such as claim 96-98 any one of them receiving terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Mutually solely It is vertical,For downward rounding operation symbol.
112. the receiving terminal as described in claim 111, it is characterised in that the pre-coding matrix that the transmitter is sent refers to Show that PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄, the PMI₃It is described for indicating i₁, the PMI₄For indicating the i₂And i₃, the PMI₄For the i₂And i₃Combined coding value, the PMI₄=Pi₂+ i₃。
113. such as claim 96-98 any one of them receiving terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N just Integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operation symbol.
114. the receiving terminal as described in claim 113, it is characterised in that the pre-coding matrix that the transmitter is sent refers to Show that PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅It is described for indicating i₁, the PMI₆For indicating the i₄。
115. such as claim 96-98 any one of them receiving terminals, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1.
116. the receiving terminal as described in claim 115, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32, 1/16 or 1/8.
117. such as claim 96-100 any one of them receiving terminals, it is characterised in that

The processor is additionally operable to：Line replacement or column permutation are carried out to the W according to the numbering of antenna.
118. such as claim 96-100 any one of them receiving terminals, it is characterised in that the receiving terminal further includes receiver,

The receiver, the reference signal sent for receiving the transmitting terminal；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.
A kind of 119. transmitting terminal, it is characterised in that including：

Receiver, for receiving the pre-coding matrix instruction PMI of receiving terminal transmission；

Processor, the pre-coding matrix instruction PMI for being received according to the receiver determine that the receiving terminal is based on ginseng The pre-coding matrix W that signal is selected from code book is examined, wherein, it is describedMatrix X₁It is according to θ₁Definite, Matrix X₂It is according to θ₂WithDefinite, the θ₁Represent that adjacent two antennas in transmitting terminal first antenna group are directed to same biography The phase difference of defeated layer transmitting signal weighting value, the θ₂Represent adjacent two antennas in the second antenna sets of transmitting terminal for same Transport layer launches the phase difference of signal weighting value, describedRepresent the first antenna group and second antenna sets for same The transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, and the n is non-less than the M Negative integer, the θ of at least one pre-coding matrix in the code book₁And θ₂Differ, the first antenna group and described second Antenna sets belong to same multiaerial system.
120. the transmitting terminal as described in claim 119, it is characterised in that the W is corresponding with order instruction, the order instruction pair Should be in the useful transmission number of plies.
121. the transmitting terminal as described in claim 120, it is characterised in that

It is described when the order instruction is 1

It is described when the order instruction is 2

Wherein, the α and β is constant.
122. the transmitting terminal as described in claim 121, it is characterised in that

When the order instruction is 1,

It is described

When the order instruction is 2,

It is described

Wherein, it is describedThe Y₁And Y₂Column selection is tieed up for mutually independent P × 1 Select vector, the N=2^k, the k is nonnegative integer, and the m is the nonnegative integer less than the N, and the P is less than the N Positive integer.
123. the transmitting terminal as described in claim 122, it is characterised in that the P values are 4, the Y₁And Y₂It is respectively following One kind in column vector：

With
124. the transmitting terminal as described in claim 122 or 123, it is characterised in that the W₁To represent the characteristic of channel in broadband Matrix, the W₂ ¹And W₂ ²It is the matrix for the characteristic of channel for representing subband；

Alternatively, the W₁To represent the matrix of the long-term characteristic of channel, the W₂ ¹And W₂ ²It is the characteristic of channel for representing short-term Matrix.
125. the transmitting terminal as described in claim 122 or 123, it is characterised in that the pre-coding matrix that the receiver receives Instruction PMI includes the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂；

The processor is specifically used for：According to the PMI₁Determine the institute that the receiving terminal is selected based on reference signal from code book State W₁, and according to the PMI₂Determine the W that the receiving terminal is selected from code book₂ ¹Or W₂ ²；

Correspondingly, the processor is specifically used for：According to the W₁With the W₂ ¹Determine the W, or according to the W₁With it is described W₂ ²Determine the W.
126. the transmitting terminal as described in claim 120, it is characterised in that when the order instruction is 1,

It is described

Alternatively,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y, Y₁' and Y₂' it is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, the P For the positive integer less than N, α is constant, and θ ' is real number.
127. the transmitting terminal as described in claim 126, it is characterised in that the P values are 4, described Y, Y₁' and Y₂' be respectively One kind in following column vector：

With
128. the transmitting terminal as described in claim 126 or 127, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ¹It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ¹To represent the matrix of the short-term characteristic of channel.
129. the transmitting terminal as described in claim 126 or 127, it is characterised in that the precoding that the receiver receives Matrix instruction PMI includes the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈；

The processor is specifically used for：According to the PMI₇Determine the institute that the receiving terminal is selected based on reference signal from code book State W₃, and according to the PMI₈Determine the W that the receiving terminal is selected from code book₄ ¹；

Correspondingly, the processor is specifically used for：According to the W₃With the W₄ ¹Determine the W.
130. the transmitting terminal as described in claim 120, it is characterised in that when the order instruction is 2,

Wherein,n₁,n₂,…,n_PIt is whole Number, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is small In the positive integer of N, β is constant, and θ ' is real number.
131. the transmitting terminal as described in claim 120, it is characterised in that when the order instruction is 2,

It is described

Wherein, the θ₁Specific adjacent two antennas represented in transmitting terminal first antenna group are for first in two transport layers The phase difference of a transport layer transmitting signal weighting value, the θ₂Specific adjacent two antennas represented in the second antenna sets of transmitting terminal For the phase difference of first transport layer transmitting signal weighting value in two transport layers, the θ₃Represent transmitting terminal first antenna Adjacent two antennas in group are for the phase difference of second transport layer transmitting signal weighting value in two transport layers, the θ₄ Represent that adjacent two antennas in the second antenna sets of transmitting terminal add for second transport layer transmitting signal in two transport layers The phase difference of weights,n₁,n₂,…,n_P For integer, Y₃And Y₄It is that P × 1 dimension column selection is vectorial, the D, Y₃, Y₄WithSo that any one precoding in codebook set Two in matrix arrange mutually orthogonal, N=2^k, k is nonnegative integer, and m1 is the nonnegative integer less than N, and the P is just whole less than N Number, β is constant, and θ ' is real number.
132. the transmitting terminal as described in claim 130 or 131, it is characterised in that the P values are 4, the Y₃And Y₄Respectively For one kind in following column vector：

With
133. the transmitting terminal as described in claim 130 or 131, it is characterised in that

The W₃To represent the matrix of the characteristic of channel in broadband, W₄ ²It is the matrix for the characteristic of channel for representing subband；Or

The W₃To represent the matrix of the long-term characteristic of channel, the W₄ ²To represent the matrix of the short-term characteristic of channel.
134. the transmitting terminal as described in claim 130 or 131, it is characterised in that the precoding that the receiver receives Matrix instruction PMI includes the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀,

The processor is specifically used for：According to the PMI₉Determine the institute that the receiving terminal is selected based on reference signal from code book State W₃, and according to the PMI₁₀Determine the W that the receiving terminal is selected from code book₄ ²；

Correspondingly, the processor is specifically used for：According to the W₃With the W₄ ²Determine the W.
135. such as claim 119-121 any one of them transmitting terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the M is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1), the i₂And i₃It is positive integer and the i₂And i₃Mutually solely It is vertical,For downward rounding operation symbol.
136. the transmitting terminal as described in claim 135, it is characterised in that the pre-coding matrix instruction that the receiver receives PMI includes the 3rd pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄；

The processor is specifically used for：

According to the PMI₃Determine the i₁, and according to the PMI₄Determine the i₂And i₃, wherein, the PMI₄For the i₂With i₃Combined coding value, PMI₄=Pi₂+i₃；

According to the i₁、i₂And i₃Determine the pre-coding matrix W that the receiving terminal is selected from code book.
137. such as claim 119-121 any one of them transmitting terminals, it is characterised in that

It is describedIt is described

Wherein, the N=2^k, the k is nonnegative integer, and the A is the positive integer of N described in aliquot, and the P is less than the N Positive integer, the i₁For the nonnegative integer less than (N/A-1),For downward rounding operation symbol, mod is modulo operator Number.
138. the transmitting terminal as described in claim 137, it is characterised in that the pre-coding matrix that the receiver receives refers to Show that PMI includes the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆；

The processor is specifically used for：

According to the PMI₅The i indicated₁With the PMI₆The i indicated₄Determine what the receiving terminal was selected from code book The W.
139. such as claim 119-121 any one of them transmitting terminals, it is characterised in that

The θ₂=θ₁+ Δ θ, wherein, it is describedThe N=2^k, the k is nonnegative integer, and the m is less than described The nonnegative integer of N, the absolute value of the Δ θ=2 π t, the t are less than 1；

The processor is specifically used for：

The θ that the pre-coding matrix instruction PMI received according to the receiver is indicated₁With the definite receiving terminal of Δ θ from code The pre-coding matrix W selected in this.
140. the transmitting terminal as described in claim 139, it is characterised in that the t is -1/8, -1/16, -1/32,0,1/32, 1/16 or 1/8.
141. such as claim 119-123 any one of them transmitting terminals, it is characterised in that

The processor is additionally operable to：

Line replacement or column permutation are carried out to the W according to the numbering of antenna.
142. such as claim 119-123 any one of them transmitting terminals, it is characterised in that the transmitting terminal further includes transmission Device,

The transmitter, for sending the reference signal to the receiving terminal, believes so that the receiving terminal is based on the reference Number pre-coding matrix W selected from code book；

Wherein, the reference signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal The specific reference signal CRS of DM RS, cell.