CN107302389A - A kind of 3DMU MIMO pre-coding matrixes building method and device - Google Patents
A kind of 3DMU MIMO pre-coding matrixes building method and device Download PDFInfo
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- CN107302389A CN107302389A CN201710748210.2A CN201710748210A CN107302389A CN 107302389 A CN107302389 A CN 107302389A CN 201710748210 A CN201710748210 A CN 201710748210A CN 107302389 A CN107302389 A CN 107302389A
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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
- H04B7/0452—Multi-user MIMO systems
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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
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Abstract
The present invention relates to wireless communication technology field, more particularly to a kind of 3D MU MIMO pre-coding matrixes building methods and device.Wherein, the 3D MU MIMO pre-coding matrix building methods, including：Pre-coding matrix W is constructed to represent the first codebook matrix W in broadband or long-term channel characteristics1With for the first codebook matrix W1Second code book matrix W of bandwidth selection3, represent the second code book matrix W of arrowband or short-term channel behaviors2Product, first codebook matrix is：
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of 3D MU-MIMO pre-coding matrixes building method and
Device.
Background technology
In multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) system, lead on a base station
The standing antenna for base station being equipped with more than 128.Simultaneously base station by wireline cable respectively with multiple wireless access port (Radio
Access Port, RAP) connect, these wireless access ports are distributed in the different positions of the cellular cell under the base station range
Put and be deployed with multiple radio-frequency antennas on place, each wireless access port.Transmission end of base station is utilizing antenna for base station transmission signal
Before, it is necessary to carry out precoding to signal to be launched.Precoding technique is that a kind of transmission end of base station utilizes channel condition information
Transmission signal is pre-processed, the signal processing technology for the purpose of the bit error rate for improving power system capacity or reduction system.
Usually, it is the channel by obtaining the channel between antenna for base station and multiple wireless access ports to obtain precoding
Information matrix；Interference channel matrix is obtained according to channel information matrix；Interference channel matrix is expanded, obtains expanding interference
Channel matrix；Singular value decomposition (Singular Value are carried out to the associate matrix for expanding interference channel matrix
Decomposition, SVD), obtain first layer pre-coding matrix；After first layer pre-coding matrix premultiplication channel information matrix
Obtained matrix carries out SVD decomposition, obtains second layer pre-coding matrix；Prelisted according to first layer pre-coding matrix and the second layer
Code matrix computations obtain pre-coding matrix.
Specifically, the implementation of MIMO technology will depend on the utilization for channel condition information (CSI), in order to by hair
Sending end carries out precoding to improve system transmission performance, and transmitting terminal needs to know channel condition information (Channel Statement
Information, CSI), and channel condition information CSI carries out channel estimation using reference sequences generally by receiving terminal and obtained, this
It is generally necessary to receiving terminal channel condition information CSI and transmitting terminal is fed back to, for calculating suitable precoding in transmitting terminal
Or beam forming parameter.However, the finiteness of CSI feedback channel determines that the design of precoding codebook is necessary.In order to
Feedback quantity is reduced, a kind of dicode this W=W constituted by two layers is proposed in the situation on high order and low-rank1*W2Precoding
Method, W1With W2It is long-term pre-coding matrix (that is, the precoding square calculated using the long-time statistical of channel condition information respectively
Battle array) and short-term pre-coding matrix (that is, the pre-coding matrix calculated using the short term statistics of channel condition information).
Although proposing the pre-coding scheme based on dicode sheet in the prior art, such as existing LTE R8 systems are bases
It is main in mirror transformation Householder 4 antenna codebooks designed and 8 antenna codebooks of the LTE R10 systems based on dicode the design
Not account for the vertical free degree to antenna for level to Antenna Design, not filled in the free degree of space resources
Divide and utilize, be especially not efficiently used in the space resources of perpendicular domains, thus in multiple user distributions in same building thing
Different floors in the case of, these schemes be difficult to support multi-user transmission, be directly used in AAS antenna for base station deployment when, system
Performance is by degradation.
The content of the invention
The present invention in view of the shortcomings of the prior art, proposes a kind of 3D MU-MIMO pre-coding matrixes building method and device,
Applied in 4G LTE, LTE-A and 5G IMT-2020 GSMs eMBB, using including supporting vertical direction and level
The pre-coding matrix that direction quantifies, can make full use of the free degree of active antenna system vertical direction, so as to improve CSI feedback
Precision and throughput of system.
In a first aspect, the present invention proposes a kind of 3D MU-MIMO pre-coding matrix building methods, including：
Pre-coding matrix W is constructed to represent the first codebook matrix W in broadband or long-term channel characteristics1With for described first
Codebook matrix W1Second code book matrix W of bandwidth selection3, represent the second code book matrix W of arrowband or short-term channel behaviors2Product,
I.e.：
W=W3*W1*W2
First codebook matrix is：
Wherein, RCLA,H、RCLA,V、RULA,H、RULA,VIt is diagonal matrix, matrix DCLA,H、DCLA,V、DULA,H、DULA,VBe respectively classified as
Discrete Fourier transform DFT vectors.
Preferably, the W2For selection matrix W1In column vector or linear weighted combination matrix W1In column vector from
And constitute matrix W.
Preferably, it is described when the transmission antenna of the 3D MU-MIMO systems is four antennas and only transmits a code word
Channel independence precoding transmissions are one layer of transmission, or use two layers of progress re-transmission transmission for a code word.
Preferably, when the transmission antenna of the 3D MU-MIMO systems is eight antennas and only transmits a code word, institute
It is one layer of transmission to state channel independence precoding transmissions, or uses four layers or eight layers transmission for two code words.
Preferably, the first codebook matrix W1In matrix RCLA,H、RCLA,V、RULA,H、RULA,VBe respectively listed in [0,2 π]
Chosen in phase interval in equally distributed discrete Fourier transform DFT vectors.
Preferably, the first codebook matrix W1In matrix RCLA,H、RCLA,V、RULA,H、RULA,VThe ripple that is constituted of each row
It is adjacent overlapping between beam group subset.
Preferably, when the pre-coding matrix W set in matrix it is more than one when, to different subcarriers in turn according to
Positive sequence is using the logm in pre-coding matrix W set according to progress precoding.
Preferably, the pre-coding matrix W is at least one class index RI, the second code book matrix W2It is each
Code word is in the second code book matrix W2Every other code word on distinguished by every layer of at least two beam selection vector.
Preferably, in the pre-coding matrix W code books each code word according to the distribution feelings of corresponding basic beam pattern
Condition, vertical and horizontal direction average packet is carried out to code book.
Second aspect, the present invention proposes a kind of 3D MU-MIMO pre-coding matrix constructing apparatus, including：
Transmitter, for sending reference signal to receiving device；
Receiver, for receiving the pre-coding matrix instruction PMI that the receiving device is sent；
Determiner, for determining that the receiving device is based on reference signal and constructs the pre-coding matrix according to the PMI
W。
Beneficial effects of the present invention：A kind of 3D MU-MIMO pre-coding matrixes building method and device of the present invention, is utilized
Including the pre-coding matrix for supporting vertical direction to quantify with horizontal direction, active antenna system vertical direction can be made full use of
The free degree, solves the precision and system of the CSI feedback in 4G LTE, LTE-A and 5G IMT-2020 GSMs eMBB
The problem of handling capacity.
Brief description of the drawings
With accompanying drawing, the invention will be further described, but the embodiment in accompanying drawing does not constitute any limitation of the invention.
Fig. 1 is the example structure schematic diagram of 3D MU-MIMO pre-coding matrixes constructing apparatus one of the present invention.
Embodiment
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings, and this is presently preferred embodiments of the present invention.
The cross-polarized arrays polarized with vertical and horizontal are set to tend to lead to the transmission of good separation at transmitter
Passage, this sends attractive for multithread MIMO.Because use and the block diagonal of block diagonal structure pre-coding matrix
The block diagonal structure matching of channel matrix, so being suitable using the precoding of block diagonal structure.From this view, typically
The +/- 45 degree of cross-polarized arrays used are because send two not same polarizations in both vertical polarization and horizontal polarization
Mix, then channel matrix is likely to not use horizontal and vertical polarization to be block diagonal like that for another example, and this potentially increases
Inter-stream interference is added, and has thus damaged MIMO performances, thus be considered as unattractive.Accordingly, for +/- 45 degree of cross-poles
For change situation, block diagonal pre-coding matrix structure is not optimal, but it is very common that it, which is arranged in existing deployment,.
In this case, pre-coding matrix product structure is beneficial, because it is related to resolves into two by pre-coding matrix
The product of individual matrix, causes the newly-generated channel with the trend as block diagonal.Because it is empty effectively to obtain block diagonal
Intend channel, so the block diagonal pre-coding matrix W in product structure can be used now1To match its feature.
The present invention proposes a kind of 3D MU-MIMO pre-coding matrix building methods, including：
Pre-coding matrix W is constructed to represent the first codebook matrix W in broadband or long-term channel characteristics1With for described
One codebook matrix W1Second code book matrix W of bandwidth selection3, represent the second code book matrix W of arrowband or short-term channel behaviors2Multiply
Product W=W3*W1*W2。
For the user terminal UE of the different floors positioned at same building, traditional bidimensional MIMO sometimes can not be spatially
They are distinguished, so that it is enough simultaneously with the scheduling of same running time-frequency resource to cause them to tend not to, i.e., MU-MIMO can not be used.
When the transmission antenna of 3D MU-MIMO systems is four antennas and only one code word of transmission, the precoding of channel independence is passed
Defeated is one layer of transmission, or uses two layers of progress re-transmission transmission for a code word；When the transmission antenna of 3D MU-MIMO systems is
When for eight antennas and only transmitting a code word, channel independence precoding transmissions are one layer or two layers transmission, or are two code words
Use four layers or eight layers transmission.
When the matrix in pre-coding matrix W set is more than one, different subcarriers is used according to positive sequence in turn pre-
Logm in encoder matrix W set is according to progress precoding.
Based on common phase and selection W2Design follow structure for R10 version 8Tx codebook designs, common phase allows at two
Phase adjusted is carried out between polarization group and DFT vectors are generated according to two block diagonal matrixs.Due to W2Represent arrowband or short-term letter
The codebook matrix of road characteristic, feedback cycle is shorter, thus excessively depends on W2Common phase regulation is carried out, is unfavorable for feedback and opens
Pin.
Pre-coding matrix W is at least one class index RI, the second code book matrix W2Each code word in the second code book
Matrix W2Every other code word on distinguished by every layer of at least two beam selection vector.Wherein, it is each in pre-coding matrix W code books
Individual code word carries out vertical and horizontal direction average packet to code book according to the distribution situation of corresponding basic beam pattern.
The present embodiment, the horizontal direction at transmitter has to dual polarized antenna, has in vertical direction to dual polarized antenna,
They collectively form dual polarization uniform planar aerial array, can spatially distinguish different UE.So, the first codebook matrix
For：
Wherein, RCLA,H、RCLA,V、RULA,H、RULA,VIt is diagonal matrix, matrix DCLA,H、DCLA,V、DULA,H、DULA,VBe respectively classified as
Discrete Fourier transform DFT vectors, the vector form with antenna-array response matches well.
In addition, W2For selection matrix W1In column vector or linear weighted combination matrix W1In column vector so as to constituting
Matrix W.
The present embodiment, W1Represent the codebook matrix of broadband or long-term channel characteristics, W2Represent arrowband or short-term channel behaviors
Codebook matrix.W2It can be used for selection matrix W1In column vector so as to constituting matrix W, or for linear weighted combination matrix
W1In column vector so as to constituting matrix W.The selection operation of wave beam group allows resource block (RB) of the field angle in same sub-band
On refinement or adjustment so that frequency selectivity pre-coding gain is maximum, and the main origin W of phase-adjusted function1Undertake,
Efficiently solve the problem of short-term code book feedback overhead is higher.
In the implementation, it is the selection accuracy of each beam vectors group inward flange wave beam of guarantee, adjacent beams vector is directly
Generally there is certain overlap.The overlapping of field angle can be favourable for reducing " edge effect ", i.e., prelisted when using subband
When code or CSI feedbacks, it is ensured that public W1Matrix can more preferably be selected for the different resource block in identical precoding subband
(RB)。
First codebook matrix W1In matrix RCLA,H、RCLA,V、RULA,H、RULA,VBe respectively listed in [0,2 π] phase interval
Chosen in the discrete Fourier transform DFT vectors of even distribution.Also, the first codebook matrix W1In matrix RCLA,H、RCLA,V、
RULA,H、RULA,VThe wave beam group subset that is constituted of each row between be adjacent overlapping.
As shown in figure 1, one embodiment of the invention propose a kind of 3D MU-MIMO pre-coding matrixes constructing apparatus and its
Corresponding operation principle, it is specific as follows：
First, the transmitter for sending equipment sends reference signal to receiving device；
Then, the receiver for sending equipment receives the pre-coding matrix instruction PMI that receiving device is sent；
Finally, the determiner for sending equipment determines that receiving device is based on reference signal and constructs the first codebook matrix according to PMI
W1, the second code book matrix W2, and by the first codebook matrix W1With the second code book matrix W2It is multiplied, product is the precoding of construction
Matrix W.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of 3D MU-MIMO pre-coding matrix building methods, it is characterised in that including：
Pre-coding matrix W is constructed to represent the first codebook matrix W in broadband or long-term channel characteristics1With for first code book
Matrix W1Second code book matrix W of bandwidth selection3, represent the second code book matrix W of arrowband or short-term channel behaviors2Product, i.e.,：
W=W3*W1*W2
First codebook matrix is：
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Wherein, RCLA,H、RCLA,V、RULA,H、RULA,VIt is diagonal matrix, matrix DCLA,H、DCLA,V、DULA,H、DULA,VBe respectively classified as discrete
Fourier transformation DFT vectors.
2. 3D MU-MIMO pre-coding matrix building methods according to claim 1, it is characterised in that the W2For selecting
Select matrix W1In column vector or linear weighted combination matrix W1In column vector so as to constituting matrix W.
3. 3D MU-MIMO pre-coding matrix building methods according to claim 1, it is characterised in that as the 3D MU-
The transmission antenna of mimo system be four antennas and only transmit a code word when, the channel independence precoding transmissions be one layer biography
It is defeated, or use two layers of progress re-transmission transmission for a code word.
4. 3D MU-MIMO pre-coding matrix building methods according to claim 1, it is characterised in that as the 3D MU-
The transmission antenna of mimo system be eight antennas and only transmit a code word when, the channel independence precoding transmissions be one layer biography
It is defeated, or use four layers or eight layers transmission for two code words.
5. 3D MU-MIMO pre-coding matrix building methods according to claim 1, it is characterised in that first code book
Matrix W1In matrix RCLA,H、RCLA,V、RULA,H、RULA,VBe respectively listed in equally distributed direct computation of DFT in [0,2 π] phase interval
Chosen in leaf transformation DFT vectors.
6. 3D MU-MIMO pre-coding matrix building methods according to claim 1, it is characterised in that first code book
Matrix W1In matrix RCLA,H、RCLA,V、RULA,H、RULA,VThe wave beam group subset that is constituted of each row between be adjacent overlapping.
7. according to any described 3D MU-MIMO pre-coding matrix building methods of claim 1-6, it is characterised in that when described
When matrix in pre-coding matrix W set is more than one, the precoding square is used according to positive sequence in turn to different subcarriers
Logm in battle array W set is according to progress precoding.
8. 3D MU-MIMO pre-coding matrix building methods according to claim 7, it is characterised in that the precoding square
W is at least one class index RI, the second code book matrix W for battle array2Each code word in the second code book matrix W2It is all its
Distinguished in his code word by every layer of at least two beam selections vector.
9. 3D MU-MIMO pre-coding matrix building methods according to claim 7, it is characterised in that the precoding square
Each code word carries out vertical and horizontal direction according to the distribution situation of corresponding basic beam pattern to code book in battle array W code books
Average packet.
10. a kind of 3D MU-MIMO pre-coding matrix constructing apparatus, it is characterised in that including：
Transmitter, for sending reference signal to receiving device；
Receiver, for receiving the pre-coding matrix instruction PMI that the receiving device is sent；
Determiner, for determining that the receiving device is based on reference signal and constructs the pre-coding matrix W according to the PMI.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019157742A1 (en) * | 2018-02-14 | 2019-08-22 | 华为技术有限公司 | Channel state information matrix information processing method and communication apparatus |
| WO2020063719A1 (en) * | 2018-09-27 | 2020-04-02 | Qualcomm Incorporated | Subband-granularity linear combination for a csi codebook |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404084A (en) * | 2010-09-16 | 2012-04-04 | 上海贝尔股份有限公司 | Method for determining pre-coding matrix and corresponding communication method and equipment |
| CN104184690A (en) * | 2014-09-03 | 2014-12-03 | 西安电子科技大学 | Double-layer pre-coding method applicable to 3D MIMO system |
| CN104506281A (en) * | 2015-01-14 | 2015-04-08 | 西安电子科技大学 | Radio frequency and base band mixing pre-coding method for 3D (three dimensional)-MIMO (Multiple Input Multiple Output) system |
| CN106982088A (en) * | 2017-04-13 | 2017-07-25 | 南京邮电大学 | A kind of multiple stream transmission method based on CSI RS ports in 3D mimo systems |
| CN107094041A (en) * | 2017-05-09 | 2017-08-25 | 深圳市雷克斯托通信有限公司 | Building method, transmission method, transmission equipment and the receiving device of pre-coding matrix |
-
2017
- 2017-08-28 CN CN201710748210.2A patent/CN107302389A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404084A (en) * | 2010-09-16 | 2012-04-04 | 上海贝尔股份有限公司 | Method for determining pre-coding matrix and corresponding communication method and equipment |
| CN104184690A (en) * | 2014-09-03 | 2014-12-03 | 西安电子科技大学 | Double-layer pre-coding method applicable to 3D MIMO system |
| CN104506281A (en) * | 2015-01-14 | 2015-04-08 | 西安电子科技大学 | Radio frequency and base band mixing pre-coding method for 3D (three dimensional)-MIMO (Multiple Input Multiple Output) system |
| CN106982088A (en) * | 2017-04-13 | 2017-07-25 | 南京邮电大学 | A kind of multiple stream transmission method based on CSI RS ports in 3D mimo systems |
| CN107094041A (en) * | 2017-05-09 | 2017-08-25 | 深圳市雷克斯托通信有限公司 | Building method, transmission method, transmission equipment and the receiving device of pre-coding matrix |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019157742A1 (en) * | 2018-02-14 | 2019-08-22 | 华为技术有限公司 | Channel state information matrix information processing method and communication apparatus |
| WO2020063719A1 (en) * | 2018-09-27 | 2020-04-02 | Qualcomm Incorporated | Subband-granularity linear combination for a csi codebook |
| US11799525B2 (en) | 2018-09-27 | 2023-10-24 | Qualcomm Incorporated | Subband-granularity linear combination for a CSI codebook |
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