CN109302219A - Processing method, base station, user equipment and the computer-readable medium of precoding - Google Patents
Processing method, base station, user equipment and the computer-readable medium of precoding Download PDFInfo
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- CN109302219A CN109302219A CN201710608725.2A CN201710608725A CN109302219A CN 109302219 A CN109302219 A CN 109302219A CN 201710608725 A CN201710608725 A CN 201710608725A CN 109302219 A CN109302219 A CN 109302219A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
Abstract
A kind of processing method of precoding, base station, user equipment and computer-readable medium, the described method includes: in arbitrary information feedback subframe t, the first parameter information that user equipment is fed back is received and stored, first parameter information includes the first matrix W1(t) and third matrix W3(t) information, the first matrix W1(t) it is suitable for precoding aerial array or subarray, third matrix W3(t) coupled relation being suitable between precoding mutiple antennas array；In information feedback subframe t+1, the second parameter information that user equipment is fed back is received and stored, and updating third matrix according to the first parameter information and the second parameter information is W3(t+1), the second parameter information includes the first matrix W1(t+1) information；According to the first matrix W1(t+1) and third matrix is W3(t+1), data of the decoding Jing Guo precoding.Using the above scheme, the feedback rates of the treatment process of precoding can be reduced and save the communication resource.
Description
Technical field
The present embodiments relate to the communications field more particularly to a kind of processing method of precoding, base station, user equipment and
Computer-readable medium.
Background technique
As the current information communication technology is increasingly developed, various multimedia life & amusement services be continuously developed and
Market is introduced, so that the demand of radio communication service rapidly increases in worldwide.Correspondingly, in order to respond actively this
The capacity of growing needs, communication service must increase.Therefore, multiple-input and multiple-output (Multiple-Input
Multiple-Output, MIMO) communication system also comes into being.
MIMO communication system makes signal by the way that multiple transmitting antennas and receiving antenna are respectively set in transmitting terminal and receiving end
It is transmitted and is received by the mutiple antennas of transmitting terminal and receiving end, to improve message capacity, but inevitably mutiple antennas
Between can generate interference.To reduce interference, the reliability of MIMO communication system is improved, and introduce pre-coding scheme.In precoding
In scheme, the situation of multi-antenna array, then can use matrix W if it exists1And W2Come one aerial array of precoding or one
Some subarray in aerial array, and matrix W can be used3Carry out the coupled relation between precoding mutiple antennas array.
Currently, when each channel state information (Channel State Information, CSI) feeds back subframe, user
Equipment (User Equipment, UE) needs to feed back above-mentioned matrix W to base station (Base Station, BS)1And matrix W3, BS
It stores and uses the matrix W1And matrix W3Decode the signal Jing Guo UE precoding.
But the processing method of above-mentioned precoding, there are problems that feedback rates are excessively high and the communication resource wastes.
Summary of the invention
The embodiment of the present invention solves the problems, such as that the feedback rates for being the treatment process for how reducing precoding and saving communication provide
Source.
To solve the above problems, the embodiment of the invention provides a kind of processing methods of precoding, which comprises
Arbitrary information feedback subframe t, receives and stores the first parameter information that user equipment is fed back, in which: described
First parameter information includes the first matrix W of current channel condition information feedback subframe1(t) and third matrix W3(t) information,
First matrix W1Suitable for some subarray in one aerial array of precoding or an aerial array, the third square
Battle array W3Suitable for the coupled relation between precoding mutiple antennas array；In adjacent next information feedback subframe t+1,
The second parameter information that user equipment is fed back is received and stored, and more according to first parameter information and the second parameter information
The third matrix of new current channel condition information feedback subframe is W3(t+1), in which: second parameter information includes current letter
First matrix W of channel state information feedback subframe1(t+1) information；According to first matrix W1(t+1), the second matrix W2(t
+ 1) and the third matrix is W3(t+1) coded data, and by the data transmission after coding to the user equipment.
Optionally, the third matrix W of the current channel condition information feedback subframe3(t+1) meet following formula:
Wherein:P-th of aerial array is relative to first when for information feedback subframe (t+1)
The phase difference of aerial array, p are the index of aerial array, phase differenceIt is to be caused by alignment error and range difference, j
For the mark of imaginary number.
Optionally, the antenna array structure is evenly distributed or uneven arrangement.
Optionally, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceRelative to described
Three matrix Ws3It (t+1) is additive factor.
Optionally, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceMeet following formula:
Wherein:U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase, Mg(p)
For the vertical index of aerial array p, and meet Mg(p)∈[1,Mg- 1], Ng(p) horizontal index for being aerial array p, and meet
Ng(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT mistake
Decimation factor, N1And N2For two-dimensional vector length.
Optionally, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceRelative to described
Three matrix Ws3It (t+1) is multiplication factor.
Optionally, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceMeet following formula:
Wherein,U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase, Mg(p)
For the vertical index of aerial array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng
(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2It crosses and adopts for DFT
Like factor, N1And N2For two-dimensional vector length；For the antenna distance ratio of the vertical direction M of aerial array,For day
The antenna distance ratio of the horizontal direction N of linear array.
The embodiment of the invention provides a kind of processing methods of precoding, which comprises in arbitrary channel status
Information feeds back subframe t, the first parameter information of feedback to base station, in which: first parameter information includes current channel condition letter
First matrix W of breath feedback subframe1(t) and third matrix W3(t) information, first matrix W1(t) it is suitable for precoding one
Some subarray in aerial array or an aerial array, the third matrix W3(t) it is suitable for precoding mutiple antennas battle array
Coupled relation between column；In adjacent next information feedback subframe t+1, the second parameter information is fed back to the base
It stands, so that the base station, which updates current channel condition information according to first parameter information and the second parameter information, feeds back subframe
Third matrix be W3(t+1), in which: second parameter information includes the first square of current channel condition information feedback subframe
Battle array W1(t+1) information.
Optionally, the method also includes: in information feedback subframe t ', judge whether to meet condition: (t ' %
Rw3)==0；Wherein: t ' > (t+1), and Rw3For third matrix W3The feedback proportional factor；When determination meets the condition,
Feed back current third matrix W3(t’)。
The embodiment of the invention provides a kind of base station, the base station includes: storage unit, is suitable in arbitrary channel status
Information feeds back subframe t, receives and stores the first parameter information that user equipment is fed back, in which: the first parameter information packet
Include the first matrix W of current channel condition information feedback subframe1(t) and third matrix W3(t) information, first matrix W1
Suitable for some subarray in one aerial array of precoding or an aerial array, the third matrix W3Suitable for precoding
Coupled relation between mutiple antennas array；Updating unit, suitable in adjacent next information feedback subframe t+1,
The second parameter information that user equipment is fed back is received and stored, and more according to first parameter information and the second parameter information
The third matrix of new current channel condition information feedback subframe is W3(t+1), in which: second parameter information includes current letter
First matrix W of channel state information feedback subframe1(t+1) information；Coding unit is suitable for according to first matrix W1(t+
1), the second matrix W2(t+1) and the third matrix is W3(t+1) coded data, and by the data transmission after coding to institute
State user equipment.
Optionally, the third matrix W of the current channel condition information feedback subframe3(t+1) meet following formula:
Wherein:P-th of aerial array is relative to first when for information feedback subframe (t+1)
The phase difference of aerial array, p are the index of aerial array, phase difference It is to be caused by alignment error and range difference, j
For the mark of imaginary number.
Optionally, the antenna array structure is evenly distributed or uneven arrangement.
Optionally, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceRelative to the third
Matrix W3It (t+1) is additive factor.
Optionally, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceMeet following formula:
Wherein:U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase, Mg(p)
For the vertical index of aerial array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng
(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2It crosses and adopts for DFT
Like factor, N1And N2For two-dimensional vector length.
Optionally, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceRelative to described
Three matrix Ws3It (t+1) is multiplication factor.
Optionally, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceMeet following formula:
Wherein,U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase, Mg(p)
For the vertical index of aerial array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng
(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2It crosses and adopts for DFT
Like factor, N1And N2For two-dimensional vector length；For the antenna distance ratio of the vertical direction M of aerial array,For day
The antenna distance ratio of the horizontal direction N of linear array.
The embodiment of the invention provides a kind of base station, including memory and processor, being stored on the memory can
The computer instruction run on the processor, the processor execute any of the above institute when running the computer instruction
The step of processing method for the precoding stated.
The embodiment of the invention provides a kind of computer-readable mediums, are stored thereon with computer instruction, the computer
The step of executing any of the above the method when instruction operation.
The embodiment of the invention provides a kind of user equipment, the user equipment includes: the first feedback unit, is suitable in office
The information feedback subframe t of meaning, the first parameter information of feedback to base station, in which: first parameter information includes working as
First matrix W of preceding information feedback subframe1(t) and third matrix W3(t) information, first matrix W1(t) it fits
Some subarray in one aerial array of precoding or an aerial array, the third matrix W3(t) it is suitable for prelisting
Coupled relation between code mutiple antennas array；Second feedback unit, suitable in adjacent next information feedback
Frame t+1, the second parameter information of feedback to the base station, so that the base station is believed according to first parameter information and the second parameter
The third matrix that breath updates current channel condition information feedback subframe is W3(t+1), in which: second parameter information includes working as
First matrix W of preceding information feedback subframe1(t+1) information.
Optionally, the user equipment further include: judging unit is suitable in information feedback subframe t ', judgement
Whether condition is met: (t ' %Rw3)==0；Wherein: t ' > (t+1), and Rw3For third matrix W3The feedback proportional factor；It is described
Second feedback unit is further adapted for feeding back current third matrix W when determination meets the condition3(t’)。
The embodiment of the invention provides a kind of user equipment, including memory and processor, it is stored on the memory
The computer instruction that can be run on the processor, the processor execute any of the above when running the computer instruction
The step of processing method of precoding described in kind.
The embodiment of the invention provides a kind of computer-readable mediums, are stored thereon with computer instruction, the computer
The step of executing any of the above the method when instruction operation.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantage that
Above-mentioned scheme, since at information feedback subframe (t+1), base station can be according to the first parameter information
And first matrix W1(t+1) the corresponding third matrix of information update current subframe is W3(t+1), therefore user equipment only need to be to base
Feedback of standing includes the first matrix W1(t+1) information, without including simultaneously the first matrix W to base station feedback1(t+1) and third
Matrix W3(t+1) information, therefore the feedback rates of the treatment process of precoding can be reduced, and then save the communication resource.
Further, by using the calculation of different third matrixes to different antennae array structure, can more there be needle
To property, the accuracy of precoding processing is improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of panel of one of the embodiment of the present invention including multi-antenna array；
Fig. 2 is the flow chart of the processing method of one of embodiment of the present invention precoding；
Fig. 3 is the aerial array of one of embodiment of the present invention non-uniform Distribution；
Fig. 4 is the flow chart of the processing method of one of embodiment of the present invention precoding；
Fig. 5 is the Signalling exchange schematic diagram of the treatment process of one of embodiment of the present invention precoding；
Fig. 6 is the structural schematic diagram of one of embodiment of the present invention base station；
Fig. 7 is the structural schematic diagram of one of embodiment of the present invention user equipment.
Specific embodiment
On the trades council of 3GPP, (New Radio, NR) code book of newly eating dishes without rice or wine repeatedly has been discussed.And it is current
Discuss the possibility structure of the code book of multi-antenna array.Matrix W1And W2Characterize double exponent sheets, in multi-antenna array array structure, square
Battle array W1And W2To some subarray in one aerial array of precoding or an aerial array, and matrix W can be used3
Carry out the coupled relation between precoding mutiple antennas array.
Fig. 1 shows the structural schematic diagram that one of embodiment of the present invention includes the panel of multi-antenna array, panel
Overall length Mg=2, beam overall Ng=2, entire panel include M × N number of sub-panel, and M=4, N=8,4 sub-panels are respectively panel
0, panel 1, panel 2 and panel 3.There is the aerial array of multiple right-angled intersections on each panel.IM,1Indicate same height
The fore-and-aft distance of two aerial arrays of panel, IN,1Indicate the lateral distance of two aerial arrays of the same sub-panel, IM,2
Indicate the fore-and-aft distance of two aerial arrays of two neighboring sub-panel, IN,2Indicate two antenna arrays of two neighboring sub-panel
The lateral distance of column.
Combination pre-coding matrix W can satisfy formula (1):
Wherein, W1Including the two-dimentional DFT vector having a size of M × N, W3Be size be Mg × Ng, and including aerial array couple
The vertical vector of coefficient.SymbolIndicate Kronecker (kronecker) operation, IxIndicate that size is the unit matrix of x.And
Matrix W2Include the coefficient for the multiple DFT vector sum polarizations of linear combination.
It is best pre- between panel also, under the application scenarios of multi-panel, that is, in the case where multi-antenna array
Encoder phase difference depend on first panel in the last one aerial array and second panel in first aerial array it
Between horizontal or vertical direction distance.And phase difference can further include calibration error compensation.
For ease of understanding, it may be considered that the adjacent panel of a simple situation, i.e. two of them in multi-panel uses
One-dimensional DFT.Parameter u at this timemMeet the distance between the antenna in panel with above-mentioned the distance between two calibration panels
Distance equal to the last one on different panels with first antenna.In other words, aerial array uniformly linear leap
Several panels.In fact, parameter umParameter k-1 and parameter k between phase differenceMeet following formula (2):
Also, the phase difference between vectorMeet following formula (3):
Over-sampling is not being used in special circumstances, such as O2When equal to 1,Always with
It is equal, because meeting following formula (4):
If necessary to additional phase adjustment, such as cause due to the different interval between panel or due to calibration error
Phase adjustment can be embedded into W3In matrix.W can actually be defined3Various code book formats, but these parameters at least with
umThe last one phase difference between first element it is related.Similar definition applies also for parameter umWith parameter vm.More than
Description is assuming that all panels all use identical W1And W2Under the premise of.
However, if parameter O1And O2When at least one is greater than 1, then it will appear matrix W3Selection depend on parameter m and ginseng
The problem of selection of number n.And if matrix W3Feedback rates be lower than W1, then can solve the select permeability.
And at present when each channel state information (Channel State Information, CSI) feeds back subframe, it uses
Family equipment (User Equipment, UE) needs to feed back above-mentioned matrix W to base station (Base Station, BS)1And matrix W3,
BS is stored and is used the matrix W1And matrix W3Decode the signal Jing Guo UE precoding.Therefore the processing method of above-mentioned precoding,
The problem of there are still feedback rates are excessively high and the communication resource wastes.
To solve the above problems, the base station in the embodiment of the present invention is according to the first parameter information and the first matrix W1(t+1)
The corresponding third matrix of information update current subframe be W3(t+1), therefore user equipment only need to include the first square to base station feedback
Battle array W1(t+1) information, without including simultaneously the first matrix W to base station feedback1(t+1) and third matrix W3(t+1) letter
Breath, therefore the feedback rates of the treatment process of precoding can be reduced, and then save the communication resource.
It is understandable to enable the above objects, features, and advantages of the embodiment of the present invention to become apparent, it is right with reference to the accompanying drawing
The specific embodiment of the embodiment of the present invention is described in detail.
Fig. 2 shows the flow charts of the processing method of one of embodiment of the present invention precoding, below with reference to Fig. 2 to institute
It states method to be discussed in detail step by step, the method can be implemented in accordance with the following steps:
Step S21: in arbitrary information feedback subframe t, user equipment is fed back first is received and stored
Parameter information.
It in specific implementation, can also include the second matrix W in first parameter information2(t) information, the second square
Battle array W2W is come from suitable for combination1DFT wave beam and polarization.Second matrix W2It can satisfy following formula (5):
If W corresponding to each aerial array2It is identical, φpEach aerial array can be then equal to relative to first day
The compensation factor of linear array panel 0.In specific implementation, first parameter information may include current channel condition information
The first matrix W of (Channel State Information, CSI) feedback subframe t1(t) and third matrix W3(t) information,
First matrix W1(t) some subarray being suitable in one aerial array of precoding or an aerial array, described the
Three matrix Ws3(t) coupled relation being suitable between precoding mutiple antennas array.
In specific implementation, for aerial array shown in fig. 1, matrix W1It can satisfy formula (6):
In general, W1In parameter blThe 2D DFT vector of over-sampling, in other words, parameter b can be equal tolIt can satisfy as follows
Formula (7):
Assuming that vertical DFT component of a vector m ∈ [0, O2N2, and horizontal DFT component of a vector n ∈ [0, O -1]1N1- 1], then wherein
Parameter umAnd vnMeet formula (8) and (9) respectively:
Wherein, O1、O2、N1And N2It is DFT oversample factor and two-dimensional vector length respectively.In general, all blVector is both needed to
Meet formula (10):
If i not equal to j or it is equal when, parameter blIt can satisfy following formula (11):
BHB=I (11)
In specific implementation,Compensation equal to any one aerial array p relative to first aerial array panel0
Factor, and third matrix W3Meet following formula (12):
Step S22: in adjacent next information feedback subframe t+1, it is anti-to receive and store user equipment institute
Second parameter information of feedback, and current channel condition information feedback is updated according to first parameter information and the second parameter information
The third matrix of subframe is W3(t+1)。
In specific implementation, second parameter information includes the first matrix W of current channel condition information feedback subframe1
(t+1) information, without including the third matrix W of current channel condition information feedback subframe3(t+1), therefore W can be reduced3
Feedback rates, and then the communication resource can be saved.
In specific implementation, it is assumed that the first matrix W of information feedback subframe t1(t) it is based on DFT exponent m (t)
With n (t).Third matrix W3(t) it is also fed back, and third matrix W3(t) meet following formula (13):
Also, in information feedback subframe t+1, user equipment also feeds back DFT exponent m (t+1) and n (t+1) extremely
Base station.
Therefore, the third matrix W of the current channel condition information feedback subframe3(t+1) following formula (14) be can satisfy:
Wherein:P-th of aerial array is relative to first when for information feedback subframe (t+1)
The phase difference of aerial array, p are the indexes of aerial array, and p > 0, phase difference It is by alignment error and range difference
Alignment error is caused to cause.
In specific implementation, the antenna array structure can there are many, for example can be evenly distributed, or non-
It is evenly distributed.Also, the difference of antenna array structure, phase differenceRelative to the third matrix W3(t+1) tribute
It offers or the influence of calculated result is not identical.Specifically,
When aerial array heaven linear array be classified as be uniformly distributed when, phase differenceRelative to the third matrix W3
It (t+1) is additive factor.And when aerial array heaven linear array is classified as non-uniform Distribution, phase differenceRelative to institute
State third matrix W3It (t+1) is multiplication factor.In specific implementation, when aerial array heaven linear array be classified as be uniformly distributed when, it is right
In each sub-panel, phase differenceIt can satisfy following formula (15):
Wherein:U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase.
Wherein,V when for information feedback subframe tnIn each factor phase, MgIt (p) is antenna array
The vertical index of column, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng(p)∈[1,
Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT oversample factor, N1
And N2For two-dimensional vector length.
Also, specifically,It can satisfy following formula (16):
It can satisfy following formula (17):
It can satisfy following formula (18):
It can satisfy following formula (19):
Wherein, um,kEqual to umK-th of element, arg () be equal to phase.It should be noted that since B meets formula (11)
Shown orthogonality constraint, therefore for the b in all mutually orthogonal vector setj, parameterAnd parameter?
It is equal.
Also, it in specific implementation, can be according to parameterumThe phase and subframe t and t+1 of the last one element
Corresponding parameter vn, subframe t and t+1 when umAnd vnDifferent elements between phase difference, calculating parameter
For ease of understanding, Fig. 3 shows the aerial array of one of embodiment of the present invention non-uniform Distribution.It needs to illustrate
, the angle of departure (AOD) that Fig. 3 is based only upon in horizontal direction and define, and it is same based on the azimuth (ZOD) in vertical direction
It is applicable in.
Signal phase difference α with reference to Fig. 3, between minimum antenna and therewith immediate antenna1Meet formula (20):
α1=2 π x1/λ (20)
Wherein: λ and x1Respectively equal to wavelength and range difference.And correspondingly, phase difference α2Meet following formula (21):
α2=2 π x2/λ (21)
On the other hand, with reference to Fig. 3, it is known that the angle of departure (AOD)Meet formula (22):
Based on above-mentioned, between panel phase differenceMeet formula (23):
Therefore, the signal message then based on following formula (24)~(26) shown:
Available formula (27):
In specific implementation, finally formula (27) can be substituted into formula (15), obtained when aerial array heaven linear array
When for non-uniform Distribution, phase differenceIt can satisfy following formula (28):
Wherein,U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase
Also, Mg(p) it is the vertical index of aerial array, and meets Mg(p)∈[1,Mg- 1], NgIt (p) is aerial array
Horizontal index, and meet Ng(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1-
1], O1And O2For DFT oversample factor, N1And N2For two-dimensional vector length；For the antenna of the vertical direction M of aerial array
Distance rates,For the antenna distance ratio of the horizontal direction N of aerial array.
Step S23: according to first matrix W1(t+1) and the third matrix is W3(t+1), precoding is passed through in decoding
Data.
In specific implementation, base station can be directly according to first matrix W1(t+1) and the third matrix is W3(t+
1) data by precoding, are decoded, therefore can be improved the reliability communicated between base station and user equipment.
In specific implementation, the available alignment error information in base stationIn turn by the alignment error informationGeneration
Enter formula (28), the formula (29) after can be simplified:
In the prior art, in each subframe, user equipment is required to the first matrix corresponding to base station feedback current time
W1With third matrix W3。
And the base station in the embodiment of the present invention is according to the first parameter information and the first matrix W1(t+1) information update is current
The corresponding third matrix of subframe is W3(t+1), therefore user equipment only need to include the first matrix W to base station feedback1(t+1) information,
Without including simultaneously the first matrix W to base station feedback1(t+1) and third matrix W3(t+1) information, therefore can reduce pre-
The feedback rates of the treatment process of coding, and then the communication resource can be saved.For make those skilled in the art more fully understand and
Realize the present invention, Fig. 4 shows the flow chart of the processing method of one of embodiment of the present invention precoding, as shown in figure 4, institute
The method of stating may include step:
Step S41: in arbitrary information feedback subframe t, the first parameter information is fed back to base station.
In specific implementation, first parameter information includes the first matrix W of current channel condition information feedback subframe1
(t) and third matrix W3(t) information, first matrix W1(t) it is suitable for one aerial array of precoding or an antenna array
Some subarray in column, the third matrix W3(t) coupled relation being suitable between precoding mutiple antennas array.
It in specific implementation, can also include the second matrix W in first parameter information2(t) information, the second square
Battle array W2W is come from suitable for combination1DFT wave beam and polarization.
Step S42: in adjacent next information feedback subframe t+1, the second parameter information is fed back to described
Base station, so that the base station updates current channel condition information feedback according to first parameter information and the second parameter information
The third matrix of frame is W3(t+1)。
In specific implementation, second parameter information includes the first matrix W of current channel condition information feedback subframe1
(t+1) information.
In order to reduce W3Feedback rates while, take into account the reliability of communication, in specific implementation, user equipment is also
It can judge whether to meet condition: (t ' %R in information feedback subframe t 'w3)==0, when determination meets the item
When part, current third matrix W is just fed back3(t').Wherein: t ' > (t+1), and Rw3For third matrix W3Feedback proportional because
Son.
To sum up, the user equipment in the embodiment of the present invention only feeds back at information feedback subframe (t+1)
One matrix W1(t) information, and base station can be according to the first parameter information and the first matrix W1(t+1) information update is currently sub
The corresponding third matrix of frame is W3(t+1), therefore the feedback rates of the treatment process of precoding can be reduced, and then communication can be saved
Resource.
To more fully understand those skilled in the art and realizing the present invention, Fig. 5 is shown in the embodiment of the present invention
A kind of Signalling exchange schematic diagram of the treatment process of precoding, as shown in figure 5, the signalling interactive process can be according to following step
It is rapid to implement:
Step S51: in CSI feedback subframe t, user equipment is to the first matrix W of base station feedback1(t), the second matrix W2(t) and
Third matrix W3(t) information.
Step S52: base station saves the first matrix W1(t), the second matrix W2(t) and third matrix W3(t) information.
Step S53: in CSI feedback subframe t+1, first matrix W of the user equipment to base station feedback current time1(t+1)
And second matrix W2(t+1) information.
Step S54: first matrix W at base station preservation current time1(t+1) and the second matrix W2(t+1) information, and base
In W1(t)、W1(t+1) and third matrix W3(t) information updates the third matrix W at current time3(t+1) information.
Step S55: in CSI feedback subframe t+2, user equipment is to the first matrix W of base station feedback1(t+2), the second matrix W2
(t+2) and third matrix W3(t+2) information.
Step S56: base station saves the first matrix W1(t+2), the second matrix W2(t+2) and third matrix W3(t+2) letter
Breath.
To sum up, the user equipment in the embodiment of the present invention is in subframe t+1, to the first matrix W of base station feedback1(t+1), base station
It can be according to the first parameter information and the first matrix W1(t+1) the corresponding third matrix of information update current subframe is W3(t+
1), therefore user equipment is not necessarily to base station feedback include simultaneously the first matrix W1(t+1) and third matrix W3(t+1) information, therefore
The feedback rates of the treatment process of precoding can be reduced, and then the communication resource can be saved.
To more fully understand those skilled in the art and realizing the present invention, Fig. 6 is shown in the embodiment of the present invention
A kind of structural schematic diagram of base station, as shown in fig. 6, the base station may include: that storage unit 61, updating unit 62 and coding are single
Member 63, in which:
Storage unit 61 is suitable for receiving and storing user equipment in arbitrary information feedback subframe t and being fed back
The first parameter information, in which: first parameter information include current channel condition information feedback subframe the first matrix W1
(t) and third matrix W3(t) information, first matrix W1Suitable for one aerial array of precoding or an aerial array
In some subarray, the third matrix W3Suitable for the coupled relation between precoding mutiple antennas array；
Updating unit 62, suitable for receiving and storing user and setting in adjacent next information feedback subframe t+1
Standby the second parameter information fed back, and current channel condition letter is updated according to first parameter information and the second parameter information
The third matrix of breath feedback subframe is W3(t+1), in which: second parameter information includes current channel condition information feedback
First matrix W of frame1(t+1) information；
Coding unit 63 is suitable for according to first matrix W1(t+1), the second matrix W2(t+1) and the third matrix is
W3(t+1), coded data, and by the data transmission after coding to the user equipment.
To sum up, the updating unit 62 of base station of the embodiment of the present invention can be according to the first parameter information and the first matrix W1(t+
1) the corresponding third matrix of information update current subframe is W3(t+1), therefore user equipment only need to include first to base station feedback
Matrix W1(t+1) information, without including simultaneously the first matrix W to base station feedback1(t+1) and third matrix W3(t+1) letter
Breath, therefore the feedback rates of the treatment process of precoding can be reduced, and then the communication resource can be saved.
In specific implementation, the third matrix W of the current channel condition information feedback subframe3(t+1) meet following public
Formula:Wherein:It is anti-for channel state information
Phase difference of p-th of aerial array relative to first aerial array when presenting subframe (t+1), p is the index of aerial array, phase
DifferenceIt is to cause alignment error to cause by alignment error and range difference, j is the mark of imaginary number.
In specific implementation, the antenna array structure is evenly distributed or uneven arrangement.
In specific implementation, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceRelative to institute
State third matrix W3It (t+1) is additive factor.
In specific implementation, when aerial array heaven linear array be classified as be uniformly distributed when, phase differenceMeet such as
Lower formula:
Wherein:U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase.
Wherein,V when for information feedback subframe tnIn each factor phase, MgIt (p) is antenna array
The vertical index of column, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng(p)∈[1,
Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT oversample factor, N1
And N2For two-dimensional vector length.
In specific implementation, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceRelative to
The third matrix W3It (t+1) is multiplication factor.
In specific implementation, when aerial array heaven, linear array is classified as non-uniform Distribution, phase differenceMeet
Following formula:
Wherein,U when for information feedback subframe tmIn the last one factor phase,For
V when information feedback subframe tnIn the last one factor phase,For information feedback subframe t
When umIn each factor phase,V when for information feedback subframe tnIn each factor phase.
Wherein, Mg(p) it is the vertical index of aerial array, and meets Mg(p)∈[1,Mg- 1], NgIt (p) is aerial array
Horizontal index, and meet Ng(p)∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1-
1], O1And O2For DFT oversample factor, N1And N2For two-dimensional vector length；For the antenna of the vertical direction M of aerial array
Distance rates,For the antenna distance ratio of the horizontal direction N of aerial array.
To more fully understand those skilled in the art and realizing the present invention, Fig. 7 is shown in the embodiment of the present invention
A kind of structural schematic diagram of user equipment, as shown in fig. 7, the user equipment may include: the first feedback unit 71 and second
Feedback unit 72, in which:
First feedback unit 71 is suitable for feeding back the first parameter information to base in arbitrary information feedback subframe t
It stands, in which: first parameter information includes the first matrix W of current channel condition information feedback subframe1(t) and third matrix
W3(t) information, first matrix W1(t) certain height being suitable in one aerial array of precoding or an aerial array
Array, the third matrix W3(t) coupled relation being suitable between precoding mutiple antennas array；
Second feedback unit 72, suitable for feeding back the second parameter in adjacent next information feedback subframe t+1
Information is to the base station, so that the base station updates current channel condition according to first parameter information and the second parameter information
The third matrix that information feeds back subframe is W3(t+1), in which: second parameter information includes current channel condition information feedback
First matrix W of subframe1(t+1) information.
To sum up, the second feedback unit 72 in the embodiment of the present invention is at information feedback subframe (t+1), only
Feed back the first matrix W1(t) information, and base station can be according to the first parameter information and the first matrix W1(t+1) information update
The corresponding third matrix of current subframe is W3(t+1), therefore the feedback rates of the treatment process of precoding can be reduced, and then can saved
The about communication resource.
The reduction of feedback rates and the raising of communication reliability in order to balance, in specific implementation, the user equipment may be used also
To include: judging unit (not shown), and the judging unit, it may be adapted to sentence in information feedback subframe t '
It is disconnected whether to meet condition: (t ' %Rw3)==0；Wherein: t ' > (t+1), and Rw3For third matrix W3The feedback proportional factor.Institute
The second feedback unit 72 is stated, is further adapted for feeding back current third matrix W when determination meets the condition3(t’)。
The embodiment of the invention provides a kind of computer-readable mediums, are stored thereon with computer instruction, the computer
The step of executing Fig. 3 corresponding any of the above item the method when instruction operation.
The embodiment of the invention provides a kind of computer-readable mediums, are stored thereon with computer instruction, the computer
The step of executing Fig. 4 corresponding any of the above item the method when instruction operation.
The embodiment of the invention provides a kind of base station, including memory and processor, being stored on the memory can
The computer instruction run on the processor, the processor execute Fig. 3 corresponding when running the computer instruction
The step of processing method of precoding described in one.
The embodiment of the invention provides a kind of user equipment, including memory and processor, it is stored on the memory
The computer instruction that can be run on the processor, the processor executes Fig. 4 when running the computer instruction corresponding
Described in any item precodings processing method the step of.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can store in computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (22)
1. a kind of processing method of precoding characterized by comprising
In arbitrary information feedback subframe t, the first parameter information that user equipment is fed back is received and stored,
In: first parameter information includes the first matrix W of current channel condition information feedback subframe1(t) and third matrix W3(t)
Information, first matrix W1Suitable for some subarray in one aerial array of precoding or an aerial array, institute
State third matrix W3Suitable for the coupled relation between precoding mutiple antennas array；
In adjacent next information feedback subframe t+1, the second parameter that user equipment is fed back is received and stored
Information, and the third square that current channel condition information feeds back subframe is updated according to first parameter information and the second parameter information
Battle array is W3(t+1), in which: second parameter information includes the first matrix W of current channel condition information feedback subframe1(t+1)
Information；
According to first matrix W1(t+1), the second matrix W2(t+1) and the third matrix is W3(t+1) coded data, and
By the data transmission after coding to the user equipment.
2. the processing method of precoding as described in claim 1, which is characterized in that current channel condition information feedback
The third matrix W of frame3(t+1) meet following formula:
Wherein:P-th of aerial array is relative to first antenna when for information feedback subframe (t+1)
The phase difference of array, p are the index of aerial array, phase differenceIt is to be caused by alignment error and range difference, j is void
Several marks.
3. the processing method of precoding as claimed in claim 2, which is characterized in that the antenna array structure is evenly distributed
Or uneven arrangement.
4. the processing method of precoding as claimed in claim 3, which is characterized in that when aerial array heaven, linear array is classified as uniformly
When distribution, phase differenceRelative to the third matrix W3It (t+1) is additive factor.
5. the processing method of precoding as claimed in claim 4, which is characterized in that when aerial array heaven, linear array is classified as uniformly
When distribution, phase differenceMeet following formula:
Wherein:U when for information feedback subframe tmIn the last one factor phase,For channel
V when status information feedback subframe tnIn the last one factor phase,U when for information feedback subframe tm
In each factor phase,V when for information feedback subframe tnIn each factor phase, MgIt (p) is day
The vertical index of linear array p, and meet Mg(p)∈[1,Mg- 1], Ng(p) horizontal index for being aerial array p, and meet Ng(p)
∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT over-sampling because
Son, N1And N2For two-dimensional vector length.
6. the processing method of precoding as claimed in claim 3, which is characterized in that when aerial array heaven, linear array is classified as non-equal
When even distribution, phase differenceRelative to the third matrix W3It (t+1) is multiplication factor.
7. the processing method of precoding as claimed in claim 6, which is characterized in that when aerial array heaven, linear array is classified as non-equal
When even distribution, phase differenceMeet following formula:
Wherein,U when for information feedback subframe tmIn the last one factor phase,For letter
V when channel state information feeds back subframe tnIn the last one factor phase,When for information feedback subframe t
umIn each factor phase,V when for information feedback subframe tnIn each factor phase, Mg(p) it is
The vertical index of aerial array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng(p)
∈[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT over-sampling because
Son, N1And N2For two-dimensional vector length；For the antenna distance ratio of the vertical direction M of aerial array,For aerial array
Horizontal direction N antenna distance ratio.
8. a kind of processing method of precoding characterized by comprising
In arbitrary information feedback subframe t, the first parameter information is fed back to base station, in which: the first parameter letter
Breath includes the first matrix W of current channel condition information feedback subframe1(t) and third matrix W3(t) information, first square
Battle array W1(t) some subarray being suitable in one aerial array of precoding or an aerial array, the third matrix W3(t)
Suitable for the coupled relation between precoding mutiple antennas array；
In adjacent next information feedback subframe t+1, the second parameter information is fed back to the base station, so that described
Base station updates the third matrix of current channel condition information feedback subframe according to first parameter information and the second parameter information
For W3(t+1), in which: second parameter information includes the first matrix W of current channel condition information feedback subframe1(t+1)
Information.
9. the processing method of precoding as claimed in claim 8, which is characterized in that further include:
In information feedback subframe t ', judge whether to meet condition: (t ' %Rw3)==0；Wherein: t ' > (t+1), and
Rw3For third matrix W3The feedback proportional factor；
When determination meets the condition, current third matrix W is fed back3(t’)。
10. a kind of base station characterized by comprising
Storage unit is suitable for receiving and storing user equipment is fed back first in arbitrary information feedback subframe t
Parameter information, in which: first parameter information includes the first matrix W of current channel condition information feedback subframe1(t) and
Three matrix Ws3(t) information, first matrix W1Suitable for some in one aerial array of precoding or an aerial array
Subarray, the third matrix W3Suitable for the coupled relation between precoding mutiple antennas array；
Updating unit, suitable for it is anti-to receive and store user equipment institute in adjacent next information feedback subframe t+1
Second parameter information of feedback, and current channel condition information feedback is updated according to first parameter information and the second parameter information
The third matrix of subframe is W3(t+1), in which: second parameter information includes the of current channel condition information feedback subframe
One matrix W1(t+1) information；
Coding unit is suitable for according to first matrix W1(t+1), the second matrix W2(t+1) and the third matrix is W3(t+
1) coded data, and by the data transmission after coding to the user equipment.
11. base station as claimed in claim 10, which is characterized in that the third square of the current channel condition information feedback subframe
Battle array W3(t+1) meet following formula:
Wherein:P-th of aerial array is relative to first antenna when for information feedback subframe (t+1)
The phase difference of array, p are the index of aerial array, phase difference It is to be caused by alignment error and range difference.
12. base station as claimed in claim 11, which is characterized in that the antenna array structure is evenly distributed or uneven arrangement.
13. base station as claimed in claim 12, which is characterized in that when aerial array heaven linear array be classified as be uniformly distributed when, phase
Potential differenceRelative to the third matrix W3It (t+1) is additive factor.
14. base station as claimed in claim 13, which is characterized in that when aerial array heaven linear array be classified as be uniformly distributed when, phase
Potential differenceMeet following formula:
Wherein:U when for information feedback subframe tmIn the last one factor phase,For channel
V when status information feedback subframe tnIn the last one factor phase,U when for information feedback subframe tm
In each factor phase,V when for information feedback subframe tnIn each factor phase, MgIt (p) is day
The vertical index of linear array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng(p)∈
[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT over-sampling because
Son, N1And N2For two-dimensional vector length.
15. base station as claimed in claim 12, which is characterized in that when aerial array heaven, linear array is classified as non-uniform Distribution,
Phase differenceRelative to the third matrix W3It (t+1) is multiplication factor.
16. base station as claimed in claim 15, which is characterized in that when aerial array heaven, linear array is classified as non-uniform Distribution,
Phase differenceMeet following formula:
Wherein,U when for information feedback subframe tmIn the last one factor phase,For channel
V when status information feedback subframe tnIn the last one factor phase,U when for information feedback subframe tm
In each factor phase,V when for information feedback subframe tnIn each factor phase, MgIt (p) is day
The vertical index of linear array, and meet Mg(p)∈[1,Mg- 1], Ng(p) it is the horizontal index of aerial array, and meets Ng(p)∈
[1,Ng-1]；umAnd vnFor DFT vector, and meet m ∈ [0, O2N2- 1], n ∈ [0, O1N1- 1], O1And O2For DFT over-sampling because
Son, N1And N2For two-dimensional vector length；For the antenna distance ratio of the vertical direction M of aerial array,For aerial array
Horizontal direction N antenna distance ratio.
17. a kind of user equipment characterized by comprising
First feedback unit is suitable in arbitrary information feedback subframe t, the first parameter information of feedback to base station,
In: first parameter information includes the first matrix W of current channel condition information feedback subframe1(t) and third matrix W3(t)
Information, first matrix W1(t) some subarray being suitable in one aerial array of precoding or an aerial array,
The third matrix W3(t) coupled relation being suitable between precoding mutiple antennas array；
Second feedback unit, suitable for feeding back the second parameter information extremely in adjacent next information feedback subframe t+1
The base station, so that the base station is anti-according to first parameter information and the second parameter information update current channel condition information
The third matrix for presenting subframe is W3(t+1), in which: second parameter information includes current channel condition information feedback subframe
First matrix W1(t+1) information.
18. user equipment as claimed in claim 17, which is characterized in that further include:
Judging unit is suitable for judging whether to meet condition: (t ' %R in information feedback subframe t 'w3)==0；Its
In: t ' > (t+1), and Rw3For third matrix W3The feedback proportional factor；Second feedback unit is further adapted for meeting when determining
When the condition, current third matrix W is fed back3(t’)。
19. a kind of computer-readable medium, is stored thereon with computer instruction, which is characterized in that the computer instruction operation
When perform claim the step of requiring any one of 1 to 7 the method.
20. a kind of computer-readable medium, is stored thereon with computer instruction, which is characterized in that the computer instruction operation
When perform claim the step of requiring any one of 8 to 9 the method.
21. a kind of base station, including memory and processor, be stored on the memory to run on the processor
Computer instruction, which is characterized in that perform claim requires any one of 1 to 7 institute when the processor runs the computer instruction
The step of processing method for the precoding stated.
22. a kind of user equipment, which is characterized in that including memory and processor, being stored on the memory can be in institute
The computer instruction run on processor is stated, perform claim requirement 8 to 9 is any when the processor runs the computer instruction
The step of processing method of precoding described in.
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