CN108599819A

CN108599819A - Feedback method, receiving terminal and the transmitting terminal of pre-coding matrix instruction

Info

Publication number: CN108599819A
Application number: CN201810280892.3A
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: 2018-09-28
Anticipated expiration: 2033-05-17
Also published as: CN108599819B; CN108322244A; CN104303442A; CN104303442B; CN108322243B; CN108322243A; CN108322244B

Abstract

The present invention provides a kind of feedback method of pre-coding matrix instruction, receiving terminal and transmitting terminal, this method：Receiving terminal is based on reference signal, and pre-coding matrix W is selected from code book, whereinThe 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 indicated respectively, it is describedThe first antenna group and second antenna sets are indicated 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 θ₂It differs, the first antenna group and second antenna sets belong to the 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, 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 fields, and more particularly, to the feedback side of pre-coding matrix instruction Method, receiving terminal and transmitting terminal.

Background technology

By emitting 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 state information of transmitter (Channel State Information, CSI).Common method is that user equipment (User Equipment, UE) is quantified and reported to instantaneous CSI It accuses to base station, wherein user equipment includes mobile station (Mobile Station, MS), relaying (Relay), mobile phone (Mobile Telephone), mobile phone (handset) and portable equipment (portable equipment) etc., base station includes node Base station B (NodeB) (Base station, BS), access point (Access Point), launch point (Transmission Point, TP), evolution node B (Evolved Node B, eNB) or relaying (Relay) etc..Existing long term evolution (Long Term Evolution, LTE) the CSI information of System Reports includes order instruction (Rank Indicator, RI), pre-coding matrix instruction (Precoding Matrix Indicator, PMI) and channel quality indicate (Channel Quality Indicator, CQI) Information etc., wherein RI and PMI indicates respectively the transmission number of plies used and pre-coding matrix.Commonly referred to as used precoding square The collection of battle array is combined into code book, and each pre-coding matrix therein is the code word in code book.

Codebook design used in existing LTE system is all based on strong correlation characteristic between 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, and base station is caused to carry out precoding accuracy according to the PMI information that UE is fed back It reduces, to cause performance loss larger, reduces the handling capacity of system.

Invention content

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 improves the handling capacity of system to reduce performance loss.

In a first aspect, providing a kind of feedback method of pre-coding matrix instruction, this method includes：Receiving terminal is based on reference Signal selects pre-coding matrix W, wherein described from code bookMatrix X₁It is according to θ₁Determining, square Battle array X₂It is according to θ₂WithDetermining, the θ₁Indicate 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 θ₂Indicate 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 describedIndicate that the first antenna group and second antenna sets are directed to same biography The phase difference of defeated layer transmitting signal weighting value and describedThe M is positive integer, and the n is non-negative less than the M Integer, the θ of at least one pre-coding matrix in the code book₁And θ₂It differs, the first antenna group and second day described Line group belongs to the same multiaerial system；The receiving terminal sends pre-coding matrix instruction PMI to the transmitting terminal, so as to described Transmitting terminal determines the W according to the PMI.

With reference to first aspect, in a kind of realization method 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, and institute corresponding with the order instruction is selected from code book State W.

With reference to first aspect and its any one of above-mentioned realization method realization method, it is 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.

With reference to first aspect and its any one of above-mentioned realization method realization method, it is realized in the another kind of first aspect In mode, it is based on reference signal in the receiving terminal, before selecting pre-coding matrix W in code book, the method further includes：Institute It states receiving terminal and receives 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, provides a kind of method receiving pre-coding matrix instruction, and this method includes：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 describedMatrix X₁It is according to θ₁It determines , matrix X₂It is according to θ₂WithDetermining, the θ₁Indicate adjacent two antennas in transmitting terminal first antenna group for same Transport layer emits the phase difference of signal weighting value, the θ₂Indicate adjacent two antennas in the second antenna sets of transmitting terminal for same One transport layer emits the phase difference of signal weighting value, describedIndicate the first antenna group and second antenna sets for same One transport layer emits the phase difference of signal weighting value and describedThe M is positive integer, and the n is less than the M's Nonnegative integer, the θ of at least one pre-coding matrix in the code book₁And θ₂It differs, the first antenna group and described Two antenna sets belong to the same multiaerial system.

In conjunction with second aspect, in a kind of realization method of second aspect, the W is corresponding with order instruction, and the order refers to Show and corresponds to the useful transmission number of plies.

In conjunction with any one of second aspect and its above-mentioned realization method realization method, 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.

In conjunction with any one of second aspect and its above-mentioned realization method realization method, 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 DM RS, the specific reference signal CRS of cell.

The third aspect provides a kind of receiving terminal, which includes：Selecting unit, for being based on reference signal, from code Selection pre-coding matrix W in this, wherein describedMatrix X₁It is according to θ₁Determining, matrix X₂It is basis θ₂WithDetermining, the θ₁Indicate that adjacent two antennas in transmitting terminal first antenna group emit signal for same transport layer The phase difference of weighted value, the θ₂Indicate 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 describedIndicate the first antenna group and second antenna sets for same transport layer transmitting letter The phase difference of number weighted value and describedThe M is positive integer, and the n is the nonnegative integer less than the M, in institute State the θ of at least one pre-coding matrix in code book₁And θ₂It differs, the first antenna group and second antenna sets belong to The same multiaerial system；Transmission unit, for sending pre-coding matrix instruction PMI to the transmitting terminal, so as to the transmitting End determines the W according to the PMI.

In conjunction with the third aspect, in a kind of realization method of the third aspect, the receiving terminal further includes determination unit, described Determination unit, for determining that order instruction, the order instruction correspond to the useful transmission number of plies based on the reference signal；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.

In conjunction with any one of the third aspect and its above-mentioned realization method realization method, 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.

In conjunction with any one of the third aspect and its above-mentioned realization method realization method, 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 provides a kind of transmitting terminal, which includes：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 describedSquare Battle array X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, the θ₁Indicate adjacent in transmitting terminal first antenna group Two antennas are for the phase difference of same transport layer transmitting signal weighting value, the θ₂Indicate the phase in the second antenna sets of transmitting terminal Adjacent two antennas emit the phase difference of signal weighting value for same transport layer, describedIndicate 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, institute It is the nonnegative integer less than the M, the θ of at least one pre-coding matrix in the code book to state n₁And θ₂It differs, described One antenna sets and second antenna sets belong to the same multiaerial system.

In conjunction with fourth aspect, in a kind of realization method of fourth aspect, the W is corresponding with order instruction, and the order refers to Show and corresponds to the useful transmission number of plies.

In conjunction with any one of fourth aspect and its above-mentioned realization method realization method, 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.

In conjunction with any one of fourth aspect and its above-mentioned realization method realization method, realized in the another kind of fourth aspect In mode, the transmitting terminal further includes transmission unit：The transmission unit, it is described with reference to letter for being sent to the receiving terminal Number, the pre-coding matrix W selected from code book based on the reference signal so as to the receiving terminal；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, provides a kind of receiving terminal, which includes：Processor, for being based on reference signal, from code book Middle selection pre-coding matrix W, wherein describedMatrix X₁It is according to θ₁Determining, matrix X₂It is according to θ₂ WithDetermining, the θ₁Indicate that adjacent two antennas in transmitting terminal first antenna group add for same transport layer transmitting signal The phase difference of weights, the θ₂Indicate that adjacent two antennas in the second antenna sets of transmitting terminal emit signal for same transport layer The phase difference of weighted value, it is describedIndicate that the first antenna group and second antenna sets emit signal for same transport layer The phase difference of weighted value and describedM is positive integer, and n is the nonnegative integer less than M, in the code book at least The θ of one pre-coding matrix₁And θ₂It differs, the first antenna group and second antenna sets belong to the same multiple antennas system System；Transmitter, for sending pre-coding matrix instruction PMI to the transmitting terminal, so that the transmitting terminal is determined according to the PMI The W of the processor selection.

In conjunction with the 5th aspect, in a kind of realization method of the 5th aspect, the processor is additionally operable to：Based on the reference Signal determines that order instruction, the order instruction correspond to the useful transmission number of plies；The processor is specifically used for：Based on reference to letter Number, the W corresponding with the order instruction determined is selected from code book.

In conjunction with any one of the 5th aspect and its above-mentioned realization method realization method, 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.

In conjunction with any one of the 5th aspect and its above-mentioned realization method realization method, 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, provides a kind of transmitting terminal, which includes：Receiver, for receiving the pre- of receiving terminal transmission Encoder matrix indicates PMI；Processor, described in the pre-coding matrix instruction PMI determinations for being received according to the receiver The pre-coding matrix W that receiving terminal is selected based on reference signal from code book, wherein describedMatrix X₁It is According to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, the θ₁Indicate adjacent two days in transmitting terminal first antenna group Line is for the phase difference of same transport layer transmitting signal weighting value, the θ₂Indicate adjacent two in the second antenna sets of transmitting terminal Antenna emits the phase difference of signal weighting value for same transport layer, describedIndicate the first antenna group and second day described Line group is for the same transport layer transmitting phase difference of signal weighting value and describedThe M is positive integer, and the n is Less than the nonnegative integer of the M, the θ of at least one pre-coding matrix in the code book₁And θ₂It differs, described first day Line group and second antenna sets belong to the same multiaerial system.

In conjunction with the 6th aspect, in a kind of realization method of the 6th aspect, the W is corresponding with order instruction, and the order refers to Show and corresponds to the useful transmission number of plies.

In conjunction with any one of the 6th aspect and its above-mentioned realization method realization method, 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.

In conjunction with any one of the 6th aspect and its above-mentioned realization method realization method, 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 includes 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 said program, user equipment selects pre-coding matrix W based on reference signal from code book, whereinPass through θ respectively₁And θ₂Indicate 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, 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, to reduce performance loss, improves gulping down for system The amount of spitting.

Description of the drawings

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

Fig. 1 is the 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.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiment is a 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 without making creative work Example is applied, the scope of protection of the invention should be all belonged to.

It should be understood that technical scheme of the present invention can be applied to various communication systems, such as：Global system for mobile telecommunications (GlobalSystem of Mobile communication, GSM) system, CDMA (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) it system, General Packet Radio Service (General Packet Radio Service, GPRS), drills for a long time 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) includes 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) etc., which can be through wireless Access net (RAN, Radio Access Network) is communicated with one or more core nets, for example, user equipment can be with It is mobile phone (or being " honeycomb " phone), the computer etc. with 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 base station (the Base Transceiver in GSM or CDMA Station, BTS), it can also be the base station (NodeB, NB) in WCDMA, can also be the evolved base station in LTE (Evolutional Node B, eNB or e-NodeB), or relaying etc., the present invention does 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 executes.

101, receiving terminal is based on reference signal, and pre-coding matrix W is selected from code book, whereinSquare Battle array X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, θ₁Indicate adjacent two in transmitting terminal first antenna group Antenna is for the phase difference of same transport layer transmitting signal weighting value, θ₂Indicate adjacent two days in the second antenna sets of transmitting terminal Line emits the phase difference of signal weighting value for same transport layer,Indicate that first antenna group and the second antenna sets are directed to same biography The phase difference of defeated layer transmitting signal weighting value andM is positive integer, and n is the nonnegative integer less than M, in the codebook extremely It is few that there are one the θ of pre-coding matrix₁And θ₂It differs, first antenna group and the second antenna sets belong to the same multiaerial system.

102, 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 the system that transmitting terminal (such as base station) and receiving terminal (such as UE) are 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 the joint transmission that multiple transmitting terminals carry out the same user signal, for example, transmitting terminal A has 2 antennas, transmitting Hold B that also there are 2 antennas, two transmitting terminals to carry 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 said program, receiving terminal selects pre-coding matrix W based on reference signal from code book, whereinθ₁And θ₂Indicate 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, 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 type of the reference signal in the embodiment of the present invention pair 101 is not construed as limiting.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 Can also include that channel quality indicates (channel Quality Indicator/Index, abbreviation CQI).Also need to explanation Be, UE can by receive base station notice (such as wireless heterogeneous networks (Radio Resource Control, RRC) signaling or Person's Downlink Control Information (Downlink Control Information, DCI)) or based on cell ID ID obtain with reference to letter Number resource distribution and obtain reference signal in corresponding resource or subframe.

Optionally, 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., most according to the predefined criterion of receiving terminal such as channel capacity or handling capacity 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, the channel estimation value is based on, for each order instruction allowed RI values, and corresponding pre-coding matrix calculate channel capacity or the isocratic magnitude of handling capacity；Selection is so that metric is optimal Order instruction RI as determining order instruction RI.In a step 101, receiving terminal can be based on reference signal, be selected from code book Pre-coding matrix W corresponding with 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, can also directly determine pre-coding matrix W by order instruction.

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

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

It should be understood that matrix X₁It can also be according to θ₁It is determined with other factors (such as amplitude), i.e. X₁It is according at least to θ₁It determines 's；Similarly, matrix X₂It is according at least to θ₂WithDetermining, this is not limited by the present invention.

Optionally, as one embodiment, in a step 101, pre-coding matrix W is corresponding with order instruction, order instruction pair It 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 indicated respectively Phase difference of adjacent two antennas for 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, optionally,With

Above-mentioned example is only exemplary, and have to be limited the scope of the invention, and the code book in the present invention can also be Order instruction is the code book of other values, for convenience, the code book that the code book and order instruction for being 1 with order instruction in the present invention are 2 For 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 indicated with the structure type of solid size sheet, it is of course also possible to the structure type of dicode sheet It indicates, 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 should 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 may 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.

Optionally, 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 that mutually independent P × 1 ties up column selection vector, 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 the power that N is 2, can be with value for 0,2,4,8 ..., etc., m ∈ { 0,1, L, N-1 }, P ∈{0,1,L,N-1}。

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

With

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

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

Optionally, 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 period send PMI₁And PMI₂.Wherein, PMI₁It is used to indicate W₁, PMI₂It is used to indicate 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).

Optionally, W₁For the matrix of the characteristic of channel in expression broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for indicating subband Battle array or W₁To indicate the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is the matrix for indicating the short-term characteristic of channel.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 is shared 256 pre-coding matrixes indicate that the 1st in 256 pre-coding matrixes is pre- to transmitting terminal when the PMI that receiving terminal is sent is 0 Encoder matrix indicates the 2nd precoding square in 256 pre-coding matrixes when the PMI that receiving terminal is sent is 1 to transmitting terminal Battle array ..., i.e. the value 0-255 of PMI corresponds to corresponding pre-coding matrix in 256 pre-coding matrixes respectively.It should be understood that this Inventive embodiments indicate that the mode of pre-coding matrix is not construed as limiting to receiving terminal.

Optionally, 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 should be understood that the embodiment of the present invention is not construed as limiting this.

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

Optionally, under another realization method, θ₁And θ₂Value, which can be distinguished, is：

Wherein, N=2^k, k is nonnegative integer, and A is the positive integer (for example, N=16, A=2) of aliquot N, and M is less than N's Positive integer, i₁To be less than the nonnegative integer of (N/A-1), i₂And i₃It is positive integer and i₂And i₃Independently of each other,For downward rounding Oeprator.That is the power that N is 2, can be with value for 0,2,4,8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁∈{0,1,L,N/ A-1}。

Optionally, in a step 102, receiving terminal can send third 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 period send PMI₃And PMI₄.Wherein, PMI₃It is used to indicate i₁, PMI₄It is used to indicate 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=Pi₂+i₃It determines i₃；Similarly, transmitting terminal can pre-set PMI₄And i₃Correspondence passes through PMI₄Value determine i₃, further according to relational expression PMI₄=Pi₂+i₃Determine i₂。

In other words, PMI₃And PMI₄Can have different time-domains or frequency domain granularity.Certainly, receiving terminal can lead to It crosses a PMI and directly indicates selected pre-coding matrix W.Specific embodiment can refer to above-described embodiment, herein not It repeats again.

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

Optionally, receiving terminal can send pre-coding matrix by physical control channel or Physical Shared Channel to transmitting terminal Indicate PMI.It should 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.

Optionally, under another realization method, 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, i₁To be less than (N/ A-1 nonnegative integer), i₄To be less than positive integer (such as the P=4, M=4, i of (PM-1)₄<15),It is accorded with for downward rounding operation Number, mod is modulo operation symbol.That is the power that N is 2, can be with value for 0,2,4,8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁∈{0,1,L,N/A-1}。

Optionally, 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 period send PMI₅And PMI₆.Wherein, PMI₅It is used to indicate i₁, PMI₆It is used to indicate i₄.In other words, PMI₅And PMI₆It can 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 can refer 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 the π of Δ θ=2 t, t are less than 1, example Such as, 1/8 t, -1/16, -1/32,0,1/32,1/16 or 1/8 etc..

In a step 101, receiving terminal can be according to θ₁Selection (such as current characteristic of channel) with Δ θ is 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 send two pre-coding matrix instructions with the identical or different time cycle, in other words It says, 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 can refer to above-described embodiment, no longer superfluous herein It states.

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 variation range, ensure that the weak dependence of the corresponding code book of larger spacing antenna.

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

Alternatively,

Wherein,n₁,n₂,L,n_PBe integer, can continuous value or discontinuous value, Y, Y₁' and Y₂' it is that P × 1 ties up column selection vector, 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 the power that N is 2, can be with value for 0,2,4,8 ..., etc., m1 ∈ { 0,1, L, N-1 }, P ∈ { 0,1, L, N-1 }.Example Such as, k values are 4, i.e. N=16, m1 ∈ { 0,1, L, N-1 }={ 0,1, L, 15 }, and α is constant, and θ ' is real number.

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

With

I.e.：

Optionally, 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 period send PMI₇And PMI₈.Wherein, PMI₇It is used to indicate W₃, PMI₈It is used to indicate W₄ ¹.In other words, PMI₇And PMI₈It can be with With identical or different time-domain or frequency domain granularity (either based on different period of sub-frame or subband size).

Optionally, W₃For the matrix of the characteristic of channel in expression broadband, W₄ ¹For indicate subband the characteristic of channel matrix, or W₃To indicate the matrix of the long-term characteristic of channel, W₄ ¹To indicate 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,n₁,n₂,L,n_PBe integer, can continuous value or discontinuous value, Y₃And Y₄ Column selection vector, N=2 are tieed up for P × 1^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 with value for 0,2,4,8 ..., etc., m1 ∈ { 0,1, L, N-1 }, P ∈ { 0,1, L, N-1 }.For example, k takes Value is 4, i.e. N=16, m1 ∈ { 0,1, L, N-1 }={ 0,1, L, 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), θ₁Specific adjacent two antennas indicated in transmitting terminal first antenna group are directed to two transport layers In first transport layer emit signal weighting value phase difference, θ₂Specific adjacent two days indicated 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, θ₃Indicate transmitting terminal first antenna group In adjacent two antennas for second transport layer transmitting signal in two transport layers weighted value phase difference and θ₄ Indicate 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, D, Y in above formula (16)₃, 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 should be pointed out that θ can take arbitrary real number, the embodiment of the present invention not to limit the value of θ ', for example, θ ' Value can be the integral multiple of 0 or 2 π, for example,θ ' can be positive number and be not the integral multiple of 2 π, can also be Positive number and be 2 π integral multiple, can also be negative and be 2 π integral multiple.For example,OrL be positive integer and be not N integral multiple.

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

With

I.e.：

Optionally, 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, PMI₉It is used to indicate W₃, PMI₁₀It is used to indicate 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).

Optionally, W₃For the matrix of the characteristic of channel in expression broadband, W₄ ²It is the matrix for the characteristic of channel for indicating subband, or Person W₃To indicate the matrix of the long-term characteristic of channel, W₄ ²To indicate 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 can be referred to, details are not described herein again.

Therefore, the selection of middle θ ' through the embodiment of the present invention, to ensure that the weak of the corresponding code book of larger spacing antenna Correlation.

It should be pointed out that both falling within this in such a way that other equivalent matrixes indicate above-mentioned code book (or pre-coding matrix) The range 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 executed by transmitting terminal, and It is corresponding with the method for Fig. 1, therefore will the appropriate embodiment repetitive description omitted with 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 from code book based on reference signal Encoder matrix W, whereinMatrix X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, θ₁ Indicate adjacent two antennas in transmitting terminal first antenna group for the phase difference of same transport layer transmitting signal weighting value, θ₂Table Show phase difference of adjacent two antennas in the second antenna sets of transmitting terminal for same transport layer transmitting signal weighting value,It indicates First antenna group and the second antenna sets for same transport layer transmitting signal weighting value phase difference andM is just whole Number, n are the nonnegative integer less than M, in the codebook the θ of at least one pre-coding matrix₁And θ₂Differ, first antenna group and Second antenna sets belong to the same multiaerial system.

Based on said program, 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, whereinθ₁With θ₂Indicate 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 The precision that ground improves precoding improves the handling capacity of system to reduce performance loss.

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

Optionally, 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 should 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, 4 antennas to be divided into two antenna sets, and every group includes two days Line.It should 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 can refer to above-mentioned, and details are not described herein again.For convenience of description, following examples will be with 4 It is illustrated for antenna scene.

It should be understood that matrix X₁It can also be according to θ₁It is determined with other factors such as amplitude, i.e. X₁It is according at least to θ₁It determines 's；Similarly, matrix X₂It is according at least to θ₂WithDetermining, this is not limited by the present invention.

Optionally, 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 can refer 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.

Optionally, 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, the precoding square of transmitting terminal determination Battle array can be above-mentioned (4) formula.

With

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

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

Optionally, 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 Period 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 PMI₁It determines 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.

Optionally, W₁For the matrix of the characteristic of channel in expression broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for indicating subband Battle array, W₂In upper target digital representation order value；Or W₁To indicate the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is to indicate 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, which determines, to be received 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 corresponds to corresponding pre-coding matrix in 256 pre-coding matrixes respectively.It should be understood that the present invention is implemented Example indicates that the mode of pre-coding matrix is not construed as limiting to UE.

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

Optionally, under another realization method, θ₁And θ₂Value, which can be distinguished, isWithWherein, N=2^k, k is nonnegative integer, and A is the positive integer (for example, N=16, A=2) of aliquot N, M For the positive integer less than N, i₁To be less than the nonnegative integer of (N/A-1), i₂And i₃It is positive integer and i₂And i₃Independently of each other, For downward rounding operation symbol.That is the power that N is 2, can be with value for 0,2,4,8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁ ∈{0,1,L,N/A-1}。

Optionally, in step 201, transmitting terminal receives the third pre-coding matrix instruction PMI that receiving terminal is sent₃With the 4th Pre-coding matrix instruction PMI₄, further, the PMI that receiving terminal is sent 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=Pi₂+i₃Determine i₃；Similarly, Transmitting terminal can pre-set PMI₄And i₃Correspondence passes through PMI₄Value determine i₃, further according to relational expression PMI₄=Pi₂+ i₃Determine 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 can refer to above-mentioned reality Example is applied, details are not described herein again.

Optionally, under another realization method, 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, i₁To be less than the nonnegative integer of (N/A-1), i₄For be 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 with value be 0,2,4, 8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁∈{0,1,L,N/A-1}。

Optionally, 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 that receiving terminal is sent 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 can refer to above-described embodiment, and details are not described herein again.

Optionally, under another realization method, θ₁And θ₂Value, which can also be distinguished, isAnd 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 the π of V θ=2 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..

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 be 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 can refer to above-mentioned implementation Example, details are not described herein again.

Optionally, in an implementation mode, in step 202, when order instruction is 1, the precoding of transmitting terminal determination 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, refer to it is further possible to receive two pre-coding matrixes that receiving terminal is sent with the identical or different time cycle 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, refer to it is further possible to receive two pre-coding matrixes that receiving terminal is sent with the identical or different time cycle 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 can refer 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 selects pre-coding matrix W for being based on reference signal from code book, whereinMatrix X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, θ₁Indicate transmitting terminal first day Adjacent two antennas in line group are for the phase difference of same transport layer transmitting signal weighting value, θ₂Indicate the second antenna of transmitting terminal Adjacent two antennas in group emit the phase difference of signal weighting value for same transport layer,Indicate first antenna group and second Antenna sets for same transport layer transmitting signal weighting value phase difference andM is positive integer, and n is non-negative less than M Integer, the in the codebook θ of at least one pre-coding matrix₁And θ₂It differs, first antenna group and the second antenna sets belong to same A multiaerial system.

Transmission unit 302 is selected for sending pre-coding matrix instruction PMI to transmitting terminal so that transmitting terminal is determined 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.

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 the joint transmission that multiple transmitting terminals carry out the same user signal, for example, transmitting terminal A has 2 antennas, transmitting Hold B that also there are 2 antennas, even 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.

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 should 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.

Optionally, as one embodiment, receiving terminal 300 can also include determination unit 303, and determination unit 303 is used for Determine that order instruction, order instruction correspond to the useful transmission number of plies based on reference signal.Selecting unit 301 is specifically used for：Based on ginseng Signal is examined, pre-coding matrix W corresponding with the order instruction that determination unit 303 determines is selected 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.

Optionally, in an implementation mode, by taking order instruction is 1 and 2 as an example, when the order instruction that determination unit 303 determines When being 1, the pre-coding matrix that selecting unit 301 selects 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 can refer to it is above-mentioned, herein It repeats no more.

Optionally, W₁For the matrix of the characteristic of channel in expression broadband, W₂ ¹And W₂ ²It is the square for the characteristic of channel for indicating subband Battle array, W₂In upper target digital representation order value；Or W₁To indicate the matrix of the long-term characteristic of channel, W₂ ¹And W₂ ²It is to indicate The matrix of the short-term characteristic of channel.

Optionally, the pre-coding matrix instruction PMI that transmission unit 302 is sent may include the first pre-coding matrix instruction PMI₁With the second pre-coding matrix instruction PMI₂, PMI₁It is used to indicate W₁, PMI₂It is used to indicate W₂ ¹Or W₂ ².Correspondingly, transmitting terminal can To receive the PMI of the transmission of transmission unit 302 at larger time intervals₁, transmission unit 302 is received with shorter time interval and is sent out The PMI sent₂。

Optionally, under another realization method, when the order instruction that determination unit 303 determines is 1, selecting unit 301 The pre-coding matrix selected can be above-mentioned (12) or (13) formula, and specific example can refer to above-mentioned, and details are not described herein again.

Optionally, W₃For the matrix of the characteristic of channel in expression broadband, W₄ ¹For indicate subband the characteristic of channel matrix, or W₃To indicate the matrix of the long-term characteristic of channel, W₄ ¹To indicate the matrix of the short-term characteristic of channel.

Optionally, the pre-coding matrix instruction PMI that transmission unit 302 is sent may include the 7th pre-coding matrix instruction PMI₇With the 8th pre-coding matrix instruction PMI₈, PMI₇It is used to indicate W₃, PMI₈It is used to indicate 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 transmission unit 302 at larger time intervals₇, received with shorter time interval The PMI that transmission unit 302 is sent₈。

Optionally, under another realization method, when the order instruction that determination unit 303 determines is 2, selecting unit 301 The pre-coding matrix selected can be above-mentioned (14) or (16) formula, and specific example can refer to above-mentioned, and details are not described herein again.

Optionally, W₃For the matrix of the characteristic of channel in expression broadband, W₄ ²It is the matrix for the characteristic of channel for indicating subband, or Person W₃To indicate the matrix of the long-term characteristic of channel, W₄ ²To indicate the matrix of the short-term characteristic of channel.

Optionally, the pre-coding matrix instruction PMI that transmission unit 302 is sent may include the 9th pre-coding matrix instruction PMI₉With the tenth pre-coding matrix instruction PMI₁₀, PMI₉It is used to indicate W₃, PMI₁₀It is used to indicate W₄ ².Correspondingly, transmitting terminal can be with The PMI that transmission unit 302 is sent is received at larger time intervals₉, transmission unit 302 is received with shorter time interval and is sent PMI₁₀。

Optionally, the pre-coding matrix instruction PMI that transmission unit 302 is sent may include third pre-coding matrix instruction PMI₃With the 4th pre-coding matrix instruction PMI₄, PMI₃It is used to indicate i₁, PMI₄It is used to indicate 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=Pi₂+i₃Really Determine i₃；Similarly, transmitting terminal can pre-set PMI₄And i₃Correspondence passes through PMI₄Value determine i₃, further according to relational expression PMI₄=Pi₂+i₃Determine i₂。

Optionally, under another realization method, θ₁And θ₂Value, which can also be distinguished, isWithWherein, N=2^k, k is nonnegative integer, and A is the positive integer of aliquot N, and P is small In the positive integer of N, i₁To be less than the nonnegative integer of (N/A-1), i₄To be less than positive integer (such as the P=4, M=4, i of (PM-1)₄< 15),For downward rounding operation symbol, mod is modulo operation symbol.That is N be 2 power, can with value be 0,2,4, 8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁∈{0,1,L,N/A-1}。

Optionally, the pre-coding matrix instruction PMI that transmission unit 302 is sent may include the 5th pre-coding matrix instruction PMI₅With the 6th pre-coding matrix instruction PMI₆, the PMI₅It is used to indicate i₁, PMI₆It is used to indicate i₄。

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

Optionally, 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 received based on 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, the pre-coding matrix instruction PMI for receiving 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, whereinMatrix X₁It is according to θ₁Determining, square Battle array X₂It is according to θ₂WithDetermining, θ₁Indicate 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, θ₂Indicate that adjacent two antennas in the second antenna sets of transmitting terminal emit for same transport layer The phase difference of signal weighting value,Indicate first antenna group and the second antenna sets for same transport layer transmitting signal weighting value Phase difference andM is positive integer, n is the nonnegative integer less than M, in the codebook at least one pre-coding matrix θ₁And θ₂It differs, first antenna group and the second antenna sets belong to the 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.

Optionally, 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, the code book that order instruction is 1 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 that order instruction is the code book of other values, for convenience, with order in the present invention 1 code book and order instruction is designated as to be illustrated for 2 code book, it should be appreciated that this is not limited by the present invention.

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

Optionally, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving may include first prelisting Code matrix indicates PMI₁With the second pre-coding matrix instruction PMI₂.Optionally, 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, the PMI that receiving terminal is sent is received with shorter time interval₂.It determines 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 receiving terminal choosing 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 is corresponded to respectively Corresponding pre-coding matrix in 256 pre-coding matrixes.It should be understood that the embodiment of the present invention indicates UE the mode of pre-coding matrix It is not construed as limiting.

Optionally, 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 should be understood that the embodiment of the present invention is not construed as limiting this.

Optionally, under another realization method, when order instruction is 1, the pre-coding matrix that determination unit 402 determines can Think above-mentioned (12) or (13) formula.Specific example can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving may include the 7th prelisting Code matrix indicates PMI₇With the 8th pre-coding matrix instruction PMI₈.Optionally, 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, the PMI that receiving terminal is sent is received with shorter time interval₈.It determines 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 ¹It determines pre- Encoder matrix W.

Optionally, under another realization method, when order instruction is 2, the pre-coding matrix that determination unit 402 determines can Think above-mentioned (14) or (16) formula.Specific example can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that receiving unit 401 can be specifically used for receiving may include the 9th prelisting Code matrix indicates PMI₉With the tenth pre-coding matrix instruction PMI₁₀.Receiving unit 401 can be specifically used for between longer time Every the PMI for receiving receiving terminal transmission₉, the PMI that receiving terminal is sent is received with shorter time interval₁₀.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.

Optionally, receiving unit 401 can be specifically used for receiving the third pre-coding matrix instruction PMI that receiving terminal is sent₃ With the 4th pre-coding matrix instruction PMI₄, further, the PMI that receiving terminal is sent 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=Pi₂+i₃.Determination unit 402 can be specifically used for passing through PMI₄Value and i₂And i₃'s Correspondence determines 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 by the PMI that receiving terminal is sent specifically for what is received by receiving unit 401 Battle array W.Specific embodiment can refer to above-described embodiment, and details are not described herein again.

Optionally, 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 that receiving terminal is sent 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 PMI₆It can 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 can refer to upper 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 be 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, it determines single Member 402 can be specifically used for selected pre- by directly being determined by the PMI that receiving terminal is sent of receiving of receiving unit 401 Encoder matrix W.Specific embodiment can refer to above-described embodiment, and details are not described herein again.

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

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

The embodiment of the present invention, which further provides, realizes the device embodiment of 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 may include read-only memory 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 may be A kind of IC chip, the processing capacity with 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 selects pre-coding matrix W for being based on reference signal from code book, whereinMatrix X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithDetermining, θ₁Indicate transmitting terminal first Adjacent two antennas in antenna sets are for the phase difference of same transport layer transmitting signal weighting value, θ₂Indicate transmitting terminal second day Adjacent two antennas in line group emit the phase difference of signal weighting value for same transport layer,Indicate 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 Negative integer, the in the codebook θ of at least one pre-coding matrix₁And θ₂It differs, first antenna group and the second antenna sets belong to same One multiaerial system.

Transmitter 602, for sending pre-coding matrix instruction PMI to transmitting terminal, so that transmitting terminal is handled according to PMI determinations 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.

Optionally, as one embodiment, processor 601 can be also used for determining that order instruction, order refer to based on reference signal Show and corresponds 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 order instruction that processor 601 determines 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.

Optionally, 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 can refer to it is above-mentioned, it is no longer superfluous herein It states.

Optionally, the pre-coding matrix instruction PMI that transmitter 602 is sent may include the first pre-coding matrix instruction PMI₁ With the second pre-coding matrix instruction PMI₂, PMI₁It is used to indicate W₁, PMI₂It is used to indicate W₂ ¹Or W₂ ²。

Optionally, under another realization method, 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 can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that transmitter 602 is sent may include the 7th pre-coding matrix instruction PMI₇ With the 8th pre-coding matrix instruction PMI₈, PMI₇It is used to indicate W₃, PMI₈It is used to indicate W₄ ¹.In other words, PMI₇And PMI₈It can 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。

Optionally, under another realization method, 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 can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that transmitter 602 is sent may include the 9th pre-coding matrix instruction PMI₉ With the tenth pre-coding matrix instruction PMI₁₀, PMI₉It is used to indicate W₃, PMI₁₀It is used to indicate 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。

Optionally, under another realization method, θ₁And θ₂Value, which can be distinguished, isWithWherein, N=2^k, k is nonnegative integer, and A is the positive integer (for example, N=16, A=2) of aliquot N, and M is Positive integer less than N, i₁To be less than the nonnegative integer of (N/A-1), i₂And i₃It is positive integer and i₂And i₃Independently of each other,For Downward rounding operation symbol.That is the power that N is 2, can be with value for 0,2,4,8 ..., etc., P ∈ { 0,1, L, N-1 }, i₁∈ {0,1,L,N/A-1}。

Optionally, the pre-coding matrix instruction PMI that transmitter 602 is sent may include third pre-coding matrix instruction PMI₃ With the 4th pre-coding matrix instruction PMI₄, PMI₃It is used to indicate i₁, PMI₄It is used to indicate 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=Pi₂+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。

Optionally, the pre-coding matrix instruction PMI that transmitter 602 is sent may include the 5th pre-coding matrix instruction PMI₅ With the 6th pre-coding matrix instruction PMI₆, the PMI₅It is used to indicate i₁, PMI₆It is used to indicate i₄。

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

Optionally, as another embodiment, receiving terminal 600 can also include receiver 603, receiver 603, for connecing Receive the reference signal that transmitting terminal is sent.The reference signal that processor 602 is specifically used for receiving based on receiver 603 determines that order refers to 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, the pre-coding matrix instruction PMI for receiving 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, whereinMatrix X₁It is according to θ₁Determining, matrix X₂ It is according to θ₂WithDetermining, θ₁Indicate adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting letter The phase difference of number weighted value, θ₂Indicate that adjacent two antennas in the second antenna sets of transmitting terminal emit signal for same transport layer The phase difference of weighted value,Indicate 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 nonnegative integer less than M, in the codebook the θ of at least one pre-coding matrix₁And θ₂ It differs, first antenna group and the second antenna sets belong to the 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.

Optionally, 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 pre-coding matrix that processor 702 determines can Think above-mentioned (4) formula.Specific example can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving may include the first precoding Matrix indicates PMI₁With the second pre-coding matrix instruction PMI₂.Optionally, 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, the PMI that receiving terminal is sent is received with shorter time interval₂.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 PMI₂It determines 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 ¹Determination prelists Code matrix W, or according to W₁And W₂ ²Determine pre-coding matrix W.

Certainly, it is straight can be specifically used for the PMI sent by receiving terminal received by receiver 701 for processor 702 It connects and determines selected pre-coding matrix W, 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 should be understood that the embodiment of the present invention indicates that the mode of pre-coding matrix is not construed as limiting to UE.

Optionally, 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 should be understood that the embodiment of the present invention is not construed as limiting this.

Optionally, under another realization method, when order instruction is 1, the pre-coding matrix that processor 702 determines can be with For above-mentioned (12) or (13) formula.Specific example can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving may include the 7th precoding Matrix indicates PMI₇With the 8th pre-coding matrix instruction PMI₈.Optionally, 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, the PMI that receiving terminal is sent is received with shorter time interval₈.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 PMI₈It determines 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.

Optionally, under another realization method, when order instruction is 2, the pre-coding matrix that processor 702 determines can be with For above-mentioned (14) or (16) formula.Specific example can refer to it is above-mentioned, details are not described herein again.

Optionally, the pre-coding matrix instruction PMI that receiver 701 can be specifically used for receiving may 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, the PMI that receiving terminal is sent is received with shorter time interval₁₀.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.

Optionally, receiver 701 can be specifically used for receiving the third pre-coding matrix instruction PMI that receiving terminal is sent₃With 4th pre-coding matrix instruction PMI₄, further, the PMI that receiving terminal is sent 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=Pi₂+i₃.Processor 702 can be specifically used for passing through PMI₄Value and i₂And i₃Correspondence Relationship 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 by the PMI that receiving terminal is sent specifically for what is received by receiver 701. Specific embodiment can refer to above-described embodiment, and details are not described herein again.

Optionally, 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 that receiving terminal is sent 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 PMI₆It can 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 can refer 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 receive receiving terminal 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 by the PMI that receiving terminal is sent specifically for what is received by receiver 701 W.Specific embodiment can refer to above-described embodiment, and details are not described herein again.

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

Optionally, 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 from code book based on reference signal so as to receiving terminal.Wherein, it refers 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 lists described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is implemented in hardware or software, depends on the specific application and design constraint of technical solution.Professional technician Each specific application can be used different methods to achieve the described function, 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, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit It closes or communicates to connect, can be electrical, machinery or other forms.

The unit illustrated as separating component may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme 's.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, 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.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. a kind of method receiving pre-coding matrix instruction, which is characterized in that including：

Transmitting terminal receives the pre-coding matrix instruction PMI from receiving terminal；

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, whereinMatrix X₁It is according to θ₁Determining, matrix X₂It is according to θ₂WithIt determines , the θ₁Indicate phase of adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting signal weighting value Potential difference, the θ₂Indicate that adjacent two antennas in the second antenna sets of the transmitting terminal emit signal weighting for same transport layer The phase difference of value, it is describedIndicate that the first antenna group and second antenna sets emit signal weighting for same transport layer The phase difference of value andM is positive integer, and n is the nonnegative integer less than M, at least one prelists in the code book The θ of code matrix₁And θ₂It differs, the first antenna group and second antenna sets belong to the same multiaerial system.

2. the method as described in claim 1, which is characterized in that the W is corresponding with order instruction, and the order instruction, which corresponds to, to be had The transmission number of plies.

3. method as claimed in claim 2, which is characterized 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.

4. method as described in any one of claims 1 to 3, which is characterized in that received in the transmitting terminal and come from the reception Before the pre-coding matrix instruction PMI at end, the method further includes：

The transmitting terminal sends the reference signal to the receiving terminal, wherein the reference signal includes at least one of following： The specific reference signal CRS of channel state information reference signals CSI RS, demodulated reference signal DM RS, cell.

5. a kind of transmitting terminal, which is characterized in that including：

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

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 describedMatrix X₁It is according to θ₁It determines , matrix X₂It is according to θ₂WithDetermining, the θ₁Indicate adjacent two antennas in transmitting terminal first antenna group for same Transport layer emits the phase difference of signal weighting value, the θ₂Indicate adjacent two antenna needles in the second antenna sets of the transmitting terminal Emit same transport layer the phase difference of signal weighting value, it is describedIndicate the first antenna group and the second antenna sets needle The phase difference of signal weighting value and described is emitted to same transport layerThe M is positive integer, and the n is less than institute The nonnegative integer for stating 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 the same multiaerial system.

6. transmitting terminal as claimed in claim 5, which is characterized in that the W is corresponding with order instruction, and the order instruction corresponds to The useful transmission number of plies.

7. transmitting terminal as claimed in claim 6, which is characterized 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.

8. such as claim 5 to 7 any one of them transmitting terminal, which is characterized in that the transmitting terminal further includes transmission unit：

The transmission unit, for sending the reference signal to the receiving terminal, wherein the reference signal include at least under One of row：The specific reference signal CRS of channel state information reference signals CSI RS, demodulated reference signal DM RS, cell.

9. a kind of transmitting terminal, which is characterized in that including：

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

Processor, the pre-coding matrix instruction PMI for being received according to the receiver determine that the receiving terminal is based on ginseng Examine the pre-coding matrix W that signal is selected from code book, wherein describedMatrix X₁It is according to θ₁Determining, Matrix X₂It is according to θ₂WithDetermining, the θ₁Indicate 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 θ₂Indicate that adjacent two antennas in the second antenna sets of the transmitting terminal are directed to The phase difference of same transport layer transmitting signal weighting value, it is describedIndicate 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 θ₂It differs, the first antenna group and described Second antenna sets belong to the same multiaerial system.

10. transmitting terminal as claimed in claim 9, which is characterized in that the W is corresponding with order instruction, and the order instruction corresponds to In the useful transmission number of plies.

11. transmitting terminal as claimed in claim 10, which is characterized 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.

12. such as claim 9 to 11 any one of them transmitting terminal, which is characterized in that the transmitting terminal further includes transmitter,

The transmitter, for sending the reference signal to the receiving terminal, wherein the reference signal includes at least following One of：The specific reference signal CRS of channel state information reference signals CSI RS, demodulated reference signal DM RS, cell.

13. a kind of IC chip, which is characterized in that the IC chip includes integrated circuit, the integrated circuit For：

Receive the pre-coding matrix instruction PMI from receiving terminal；

The pre-coding matrix instruction PMI received according to the receiving unit determines that the receiving terminal is based on reference signal from code The pre-coding matrix W selected in this, wherein describedMatrix X₁It is according to θ₁Determining, matrix X₂It is root According to θ₂WithDetermining, the θ₁Indicate adjacent two antennas in transmitting terminal first antenna group for same transport layer transmitting letter The phase difference of number weighted value, the θ₂Indicate that adjacent two antennas in the second antenna sets of the transmitting terminal are directed to same transport layer Emit the phase difference of signal weighting value, it is describedIndicate that the first antenna group and second antenna sets are directed to same transport layer Emit the phase difference of signal weighting value and describedThe M is positive integer, and the n is non-negative whole less than the M Number, the θ of at least one pre-coding matrix in the code book₁And θ₂It differs, the first antenna group and second antenna Group belongs to the same multiaerial system.

14. IC chip as claimed in claim 13, which is characterized in that the W is corresponding with order instruction, and the order refers to Show and corresponds to the useful transmission number of plies.

15. IC chip as claimed in claim 14, which is characterized 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.

16. such as claim 13 to 15 any one of them IC chip, which is characterized in that the integrated circuit is also used In：The reference signal is sent to the receiving terminal, wherein the reference signal includes at least one of following：Channel status is believed Cease reference signal CSI RS, demodulated reference signal DM RS, the specific reference signal CRS of cell.

17. a kind of computer readable storage medium, which is characterized in that be stored with computer in the computer readable storage medium Program or instruction, when the computer program or instruction be run when, execute following steps：

Receive the pre-coding matrix instruction PMI from receiving terminal；

18. computer readable storage medium as claimed in claim 17, which is characterized in that the W is corresponding with order instruction, institute It states order instruction and corresponds to the useful transmission number of plies.

19. computer readable storage medium as claimed in claim 18, which is characterized 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.

20. such as claim 17 to 19 any one of them computer readable storage medium, which is characterized in that when the computer When program or instruction are run, following steps are also executed：The reference signal is sent to the receiving terminal, wherein the reference Signal includes at least one of following：Channel state information reference signals CSI RS, demodulated reference signal DM RS, cell are specific Reference signal CRS.