CN108540189A - A kind of incoherent multi-antenna transmission method and device - Google Patents

A kind of incoherent multi-antenna transmission method and device Download PDF

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Publication number
CN108540189A
CN108540189A CN201710127698.7A CN201710127698A CN108540189A CN 108540189 A CN108540189 A CN 108540189A CN 201710127698 A CN201710127698 A CN 201710127698A CN 108540189 A CN108540189 A CN 108540189A
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matrix
signal
level
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equivalent
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刘兵朝
孙鹏
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Beijing Xinwei Telecom Technology Inc
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Beijing Xinwei Telecom Technology Inc
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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
    • 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
    • H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a kind of incoherent treating method and apparatus of multi-antenna signal.This method includes：Instruction terminal feeds back order instruction parameter, and order instruction parameter list shows data transfer layer number；Initial signal is obtained, carrying out level-one precoding to initial signal according to the first coding rule obtains level encoder signal；Two level pre-coding matrix is constructed according to the order instruction parameter, aerial panel port number and the antenna for base station port number that receive；According to two level pre-coding matrix to level encoder signal processing, the incoherent precoding to initial signal is completed.The present invention solves the problems, such as that the phase difference that mutiple antennas plane transport signal generates in existing coherent transmission technology is affected to system performance.This can invent the influence for reducing aerial panel transmission signal phase difference to system performance, improve signal transmission performance.

Description

A kind of incoherent multi-antenna transmission method and device
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of incoherent multi-antenna transmission methods and device.
Background technology
Extensive antenna is carried in base station can not only provide higher array gain, and can form the narrow wave of high-gain Beam is communicated with UE, while improving gain of received signal, inter-user interference can be significantly reduced, to allow multi-user same Shi Jinhang is communicated, and improves power system capacity today.In order to meet the needs of 5G is to high data rate, the NR projects of 3GPP are being studied The MIMO technology of 32 antenna ports, corresponding antenna array unit number is at least supported to be up to 256.
Consider from Project Realization angle, the concept of aerial panel (Panel), the i.e. antenna array of base station are introduced in NR projects Row include the Panel of multiple same sizes, and each Panel contains a certain number of antennas, parameter (Mg, Ng, M, N, P) is used in combination To describe the antenna configuration of base station.Wherein Mg indicates that Panel number in vertical dimensions, Ng indicate the Panel in horizontal dimensions Number, M indicate that the antenna element number in vertical dimensions in each Panel, N indicate in each Panel in horizontal dimensions Antenna element number, P indicate antenna polarization parameter, P=1 indicate single-polarized antenna, P=2 indicate dual polarized antenna.Such as (2,2,4,8,2) mean that the aerial array of base station includes 4 Panel, and each Panel arranges a dual polarized antenna list comprising 4 rows 8 Member, therefore entire aerial array includes 4 × 4 × 8 × 2=256 antenna element altogether.
It introduces after more Panel, it is inevitably poor in the presence of a random phase between different Panel, system is transmitted Performance causes certain loss.
Invention content
The embodiment of the present invention provides a kind of incoherent treating method and apparatus of multi-antenna signal, more to solve the prior art The problem of phase difference generated in a aerial panel transmission signal process influences the transmission performance of system.
In a first aspect, an embodiment of the present invention provides a kind of incoherent processing method of multi-antenna signal, this method includes.
Instruction terminal feeds back order instruction parameter, and the order instruction parameter list shows data transfer layer number.
Initial signal is obtained, carrying out level-one precoding to the initial signal according to the first coding rule obtains level encoder Signal, wherein the initial signal is that the output signal after layer mapping is carried out according to aerial panel quantity.
Two level is constructed according to the order instruction parameter, aerial panel port number and the antenna for base station port number that receive Pre-coding matrix；
According to the two level pre-coding matrix to the level encoder signal processing, the non-phase to the initial signal is completed Intervene coding.
Second aspect, the embodiment of the present invention additionally provide a kind of incoherent processing unit of multi-antenna signal, the device packet It includes：
Parameter configuration module is sent, is used to indicate terminal feedback order instruction parameter, the order instruction parameter list registration is according to biography The defeated number of plies.
Level-one precoded signal acquisition module, for obtaining initial signal, according to the first coding rule to the initial letter Number carry out level-one precoding obtain level encoder signal, wherein the initial signal be according to aerial panel quantity carry out layer reflect Output signal after penetrating.
Two level pre-coding matrix constructing module, the order instruction parameter received for basis, aerial panel port number Amount and antenna for base station port number construct two level pre-coding matrix.
Relevant precoding module, for, to the level encoder signal processing, being completed according to the two level pre-coding matrix Incoherent precoding to the initial signal.
The embodiment of the present invention solves in prior art mutiple antennas plane transport signal process and will produce phase difference, and shadow The problem of ringing to the transmission performance of system.Precoding will be independently carried out to institute's transmission data, not on the same day by each aerial panel The transmission signal of line panel then carries out incoherent transmission in the way of sending out diversity.Reduce aerial panel transmission signal phase difference Influence to system performance, improves signal transmission performance.
Description of the drawings
Fig. 1 is a kind of incoherent process flow figure of multi-antenna signal in the embodiment of the present invention one；
Fig. 2 is a kind of incoherent process flow figure of multi-antenna signal in the embodiment of the present invention two；
Fig. 3 is a kind of incoherent processing device structure diagram of multi-antenna signal in the embodiment of the present invention three.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of incoherent process flow figure for multi-antenna signal that the embodiment of the present invention one provides, this implementation Example is applicable to the case where carrying out precoding to multiple panel antennas transmission signal, and this method can be by being set to the one of base station end The incoherent processing unit of multi-antenna signal is planted to execute, which can be realized by the mode of software and/or hardware.Such as figure Shown in 1, this method includes：
S110, instruction terminal feed back order instruction parameter, and the order instruction parameter indicates the parallel data transmission number of plies；
The incoherent processing method of multi-antenna signal described in the present embodiment can be used in time division duplex long term evolution In technology (Time Division Duplex Long Term Evolution, LTE) downlink transmission process.Specifically, under LTE Row transmission uses the physical layer framework of MIMO-OFDM, multiple (most eight) by most eight transmitting antenna parallel transmissions Data flow can effectively improve hardware circuit solution.In the Physical layer procedures of LTE, precoding is its Core Feature mould Block, the transfer function of Physical Downlink Shared Channel are required for realizing by precoding.Step S110-S140 in the present embodiment is Belong to pre-encode operation.
Wherein, order instruction parameter (Rank Indication, RI) can indicate a plurality of transmission between transmitting terminal and receiving terminal Correlation between channel.In the mimo system using Nt transmission antenna and Nr reception antenna, transmission channel can be adopted It is indicated with matrix, and RI indicates transmission channel in MIMO (Multiple-Input Multiple-Output) system Order, it is considered as the number of independent parallel channel on transmission channel between transceiver, the i.e. quantity of parallel data stream.Example Property, if RI is 1, then it represents that a plurality of transmission channel is perfectly correlated, is likely to interfere with each other between the signal transmitted, makes Receiving terminal is obtained to be difficult to accurately receive.If RI is more than 1, then it represents that have the uncorrelated channel of a plurality of independence, UE that can receive different logical The signal of road, and channel capacity is improved to increase transmission reliability according to precoding rule independence or combined decoding.
In the beginning of the incoherent processing method of the multi-antenna signal, the feedback information of base station meeting configurating terminal, with instruction Terminal sends order instruction parameter according to some period, and then base station is made to get the quantity of parallel data stream in up channel.
S120, initial signal is obtained, carrying out level-one precoding to the initial signal according to the first coding rule obtains one Grade encoded signal, wherein the initial signal is that the output signal after layer mapping is carried out according to aerial panel quantity.
Wherein, initial signal is made of the data processing in the downlink transmission process of LTE according to upper layer transport, specifically , LTE system can carry out channel coding to the data from upper layer first and form code word；Then to the different code words of formation into Row modulation generates modulation symbol, and the modulation symbol of different code words is combined and carries out layer mapping, after being mapped by layer Initial signal in signal, that is, the present embodiment of generation carries out the object of pre-encode operation.
After receiving initial signal, initial signal can be pre-processed first, i.e. the first coding rule is to described initial Signal processing obtains level encoder signal, and then mitigates influence of the random phase to system performance between aerial panel.
Multi-antenna signal system in the present embodiment may include two or four aerial panel, and initial signal is according to day Line number of panels carry out the output signal after layer mapping, and the signal of the output after the mapping of different antennae number of panels layer is not Together.
Illustratively, when antenna number of panels are 2, only allow to transmit by two layers, then exported after layer maps Initial signal can be usedIt indicates.
When antenna number of panels are 4, only allow to transmit by four layers, then the initial signal exported after layer maps can With withIt indicates.
Wherein, x (i) indicates the initial signal vector of each aerial panels of moment i.Indicate the symbolic number of every layer of transmission.
Specifically, described obtain level encoder letter according to the first coding rule to initial signal progress level encoder Number, including：
Level encoder is carried out to the initial signal according to the coding rule for sending diversity and obtains level encoder signal.
Wherein, the operation principle for sending diversity is to receive carrying phase by multiple channels (time, frequency or space) With multiple copies of information, since the transmission characteristic of multiple channels is different, the decline of the multiple copies of signal would not be identical.Base station The information that side includes using multiple copies can more correctly recover the primary number of delivering letters, and reach the effect of compensation fading channel loss Fruit, to improve wireless communication signal channel quality in the case where not increasing transimission power and bandwidth.
The coding rule for sending diversity includes a variety of Space Time Coding, delay transmitting diversity coding, switching transmitting diversity coding Equal coding rules.
For coding rule to send diversity is a variety of Space Time Coding, when antenna number of panels are 2, x (i) is carried out The signal exported after Space Time Coding isIt is defined as follows：
Wherein, y(P)(2i) indicates the output signal of antenna port P.P=0 or 1.
When antenna number of panels are 4, the signal that exports is after carrying out Space Time Coding to x (i) It is defined as follows：
Wherein, y(P)(2i) indicates the output signal of antenna port P.
The order instruction parameter, aerial panel port number and the antenna for base station port number structure that S130, basis receive Make two level pre-coding matrix.
Specifically, when the network mode of base station and terminal room is tdd mode, base station side instruction terminal side sends detection ginseng Signal (Sounding Reference Signal, SRS) is examined, up channel matrix is estimated according to SRS signal, on described Row channel matrix obtains equivalent downgoing baseband channel matrix；According to aerial panel quantity to the equivalent downgoing baseband channel matrix It is split to obtain the corresponding equivalent downgoing baseband channel submatrix of each aerial panel；To each equivalent sub- square of downgoing baseband channel Battle array carries out singular value decomposition and obtains the right singular matrix of each equivalent down channel submatrix；According to the right singular matrix, order Indicate that parameter, aerial panel port number and antenna for base station port number construct two level pre-coding matrix.
Wherein, SRS signal can be used for estimating up channel frequency domain information, do frequency selective scheduling；It can be used for Estimate up channel, does down beam shaping.Tdd mode, that is, TDD mode (Time Division Duplexing, TDD), it is one kind of the full-duplex communication used in mobile communication system.In this mode, upper and lower between base station and mobile station The row time is less than channel coherency time, so that it may channel characteristics are estimated with the fairly simple SRS signal according to end side feedback, and Obtain uplink signal matrix.Equivalent Base-Band channel matrix indicates the complex envelope of bandpass signal, refers to that concentrate on a certain carrier frequency attached Close signal frequency.Transmission antenna quantity in aerial panel port number, that is, S110 is expressed as Nt and base station in the present embodiment Antenna port quantity reception antenna quantity, is expressed as Nr.
Further, equivalent downgoing baseband channel matrix is obtained according to the up channel matrix, including：Calculate uplink letter The product of road matrix and chain calibration matrix, and down channel matrix is obtained according to channel reciprocity；If base station has analog wave Beam figuration function then carries out analog beam figuration to the down channel matrix and converts to obtain equivalent downgoing baseband channel matrix； If base station does not have analog beam figuration function, directly using the down channel matrix as equivalent downgoing baseband channel square Battle array.
Illustratively, base station can send SRS signal with triggering terminal, and estimate up channel matrix according to SRS, be multiplied by chain Road calibration matrix simultaneously obtains equivalent down channel matrix H according to channel reciprocity.
Further, described that Equivalent Base-Band channel matrix is obtained according to the up channel matrix, including：Calculate uplink letter The product of road matrix and chain calibration matrix, and down channel matrix is obtained according to channel reciprocity；If base station side has simulation Wave beam forming function then carries out analog beam figuration to the down channel matrix H and converts to obtain Equivalent Base-Band channel matrix If not having analog beam figuration function, using the down channel matrix H as Equivalent Base-Band channelWhereinDimension be Nr × Nt, Nr indicate that end side antenna port number, Nt indicate base station side antenna port number.
Then aerial panel quantity n is to equivalent downgoing baseband channel matrixIt is split as the equivalent down channel of corresponding number SubmatrixI.e.And respectively to eachCarry out singular value decomposition (Singular Value Decomposition, SVD)：
It is corresponding to obtain specifically, the multi-antenna signal system in the present embodiment includes two or four aerial panel Equivalent down channel matrix can beOr Dimension be Nr × N, N Indicate the antenna port number that each aerial panel includes, it is preferred that the antenna port number that each aerial panel includes is identical.
The order instruction parameter, aerial panel port number and the antenna for base station port number structure that S130, basis receive Make two level pre-coding matrix.
Further, compare and be worth between order instruction parameter, aerial panel port number and antenna for base station port number three Size, comparison result is different, and the building method of two level pre-coding matrix is different.
Constructing the realization method design philosophy of two level pre-coding matrix can be：It independently prelists to each aerial panel Code construction, when transmit the number of plies it is less when, each layer signal is transmitted by part or all of aerial panel, when transmission the number of plies compared with When more, different layers are transmitted by different aerial panels.
It, can be according to if it is determined that meeting RI≤N, then according to formula in order to realize the make Construct the two level pre-coding matrix W, whereinExpression takes the right side corresponding with i-th of equivalent downgoing baseband channel submatrix Singular matrix ViPreceding RI row, i ∈ [1, NP], NP be aerial panel quantity.
If it is determined that meeting N≤RI≤Nt/2, then according to formula：G1=[diag { V1,V2,…,VNp/2},diag {VNp/2+1,VNp/2+2,…,VNp}]TConstruct the first intermediary matrix G1；Take the first intermediary matrix G1Preceding RI row construction described two Grade pre-coding matrix W, i.e.,：W=G1 (RI), wherein diag { V1,V2,…,VNp/2Indicate with V1,V2,…,VNp/2For block diagonal element Plain structural matrix, remaining element are 0, diag { VNp/2+1,VNp/2+2,…,VNpIndicate with VNp/2+1,VNp/2+2,…,VNpFor block pair Angle element structural matrix, remaining element are 0.
If it is determined that meeting Nt/2≤RI, then according to formula：G2=diag { V1,V2,…,VNp, construct the second intermediary matrix G2：RI row construct the two level pre-coding matrix W before taking second intermediary matrix, i.e.,：W=G2 (RI)。
S140, according to the two level pre-coding matrix to level encoder signal processing, complete to the incoherent of initial signal Precoding.
Specifically, level encoder signal y (i) completions pair that the two level pre-coding matrix premultiplication S110 obtained with S130 is obtained The incoherent coding of the initial signal.And resource impact, orthogonal frequency division multiplexing tune are carried out to the data after incoherent precoding (Orthogonal Frequency Division Multiplexing, OFDM) and simulation phase shift processing are made, and passes through antenna Array is sent.
The embodiment of the present invention will independently carry out precoding, different antennae panel by each aerial panel to institute's transmission data Transmission signal then carry out incoherent transmission in the way of sending out diversity；It reduces aerial panel and transmits signal phase difference to system The influence of performance, improves signal transmission performance.
Embodiment two
Fig. 2 is the incoherent process flow figure of the multi-antenna signal in the embodiment of the present invention two, and the present embodiment is in reality On the basis of applying example one, the pressure of transmission information is completed by calculating the average value of singular value when constructing two level pre-coding matrix Contracting, as shown in Fig. 2, this method includes：
S210, instruction terminal feed back order instruction parameter, and the order instruction parameter list shows data transfer layer number；
S220, initial signal is obtained, level-one precoding is carried out to the initial signal according to the coding rule for sending diversity Level encoder signal is obtained, the initial signal is that the output signal after layer mapping is carried out according to aerial panel quantity.
The order instruction parameter, aerial panel port number and the antenna for base station port number structure that S230, basis receive Make two level pre-coding matrix.
Optionally, the realization method design philosophy of construction two level pre-coding matrix can be：Selection has optimum channel matter The corresponding down channel of aerial panel of amount constructs precoding, and base station selected part or all of aerial panel sends each layer of letter Number, the aerial panel for sending each layer signal at this time uses identical pre-coding matrix.
It, can be according to if it is determined that meet RI≤N, then calculating the equivalent downgoing baseband letter in order to realize the make The average value of preceding RI singular value in road submatrixAnd select maximumCorresponding right singular matrix Preceding RI row construction two level pre-coding matrix：Wherein VoptFor with maximumIt is corresponding Right singular matrix, in W,It repeats Np times.
If it is determined that meeting N≤RI≤Nt/2, then it is a unusual to calculate preceding RI in the equivalent downgoing baseband channel submatrix The average value of value selects right singular matrix corresponding with maximum average value to construct VoptThird intermediary matrix G3, and take the third Intermediary matrix G3Preceding RI row construction two level pre-coding matrix W, specific formula are：G3=[diag { Vopt,Vopt,…,Vopt},diag {Vopt,Vopt,…,Vopt}]T, W=G3 (RI)；Wherein, in G3In diag { Vopt,Vopt,…,Vopt, VoptIt repeats Np/2 times.
If it is determined that meet Nt/2≤RI, then calculates and state putting down for preceding RI singular value in equivalent downgoing baseband channel submatrix Mean value selects right singular matrix V corresponding with maximum average valueoptConstruct the 4th intermediary matrix G4, take the 4th intermediary matrix VoptPreceding RI row construction two level pre-coding matrix W, specific formula are：G4=diag { Vopt,Vopt,…,Vopt, W=G4 (RI)；Its In, in G4In diag { Vopt,Vopt,…,Vopt, VoptIt repeats Np times.
S240, according to the two level pre-coding matrix to the level encoder signal processing, complete to the initial signal Incoherent precoding.
The technical solution of the present embodiment states putting down for preceding RI singular value in equivalent downgoing baseband channel submatrix by calculating Mean value selects right singular matrix corresponding with maximum average value to construct two level pre-coding matrix, improves transmission reliability.
Embodiment three
The incoherent processing method apparatus structure that Fig. 3 show a kind of multi-antenna signal of the offer of the embodiment of the present invention three shows It is intended to, as shown in figure 3, the incoherent processing method device of the multi-antenna signal includes：Send parameter configuration module 310, level-one Precoded signal acquisition module 320, two level pre-coding matrix constructing module 330 and initial signal are concerned with precoding module 340.
Wherein, parameter configuration module 310 is sent, terminal feedback order instruction parameter, the order instruction parameter list are used to indicate Show data transfer layer number.
Level-one precoded signal acquisition module 320, for obtaining initial signal, according to the first coding rule to described initial Signal carries out level-one precoding and obtains level encoder signal, wherein the initial signal is to carry out layer according to aerial panel quantity Output signal after mapping.
Two level pre-coding matrix constructing module 330, the order instruction parameter received for basis, aerial panel port Quantity and antenna for base station port number construct two level pre-coding matrix.
Initial signal is concerned with precoding module 340, for being believed the level encoder according to the two level pre-coding matrix Number processing, completes incoherent precoding to the initial signal.
The embodiment of the present invention will independently carry out precoding, different antennae panel by each aerial panel to institute's transmission data Transmission signal then carry out incoherent transmission in the way of sending out diversity；Solves mutiple antennas face in existing coherent transmission technology The problem of phase difference that plate transmission signal generates is affected to system performance.Reduce aerial panel transmission signal phase difference pair The influence of system performance, improves signal transmission performance.
On the basis of the various embodiments described above, level-one pre-coding matrix computing module 320 includes：
Diversity coding unit is sent, for carrying out level encoder to the initial signal according to the coding rule for sending diversity Obtain level encoder signal.
On the basis of the various embodiments described above, two level pre-coding matrix constructing module 330 includes：
Equivalent downgoing baseband channel matrix acquiring unit is used for when the network mode of base station and terminal room is tdd mode, SRS signal is obtained, up channel matrix is estimated according to SRS signal, equivalent downgoing baseband is obtained according to the up channel matrix Channel matrix；
Equivalent downgoing baseband channel submatrix acquiring unit is used for according to aerial panel quantity to the Equivalent Base-Band channel Matrix is split to obtain equivalent downgoing baseband channel submatrix corresponding with different antennae panel；
Singular value decomposition unit, it is each for being obtained to each equivalent downgoing baseband channel submatrix progress singular value decomposition The right singular matrix of equivalent downgoing baseband channel submatrix；
Two level pre-coding matrix structural unit, for according to the right singular matrix, order instruction parameter, aerial panel port Quantity and antenna for base station port number construct two level pre-coding matrix.
On the basis of the various embodiments described above, the Equivalent Base-Band channel matrix acquiring unit includes：
Down channel matrix obtains subelement, the product for calculating up channel matrix and chain calibration matrix, and root Down channel matrix is obtained according to channel reciprocity；
Equivalent downgoing baseband channel obtains the first subelement, if having the function of analog beam figuration for base station, to institute Down channel matrix progress analog beam figuration is stated to convert to obtain equivalent downgoing baseband channel matrix；
Equivalent downgoing baseband channel obtains the second subelement, will if not having analog beam figuration function for base station The down channel matrix is as equivalent downgoing baseband channel.
On the basis of the various embodiments described above, the two level pre-coding matrix structural unit includes：
First value range subelement, for if it is determined that meeting RI≤N, then according to formula Construct the two level pre-coding matrix W, whereinExpression takes the right side corresponding with i-th of equivalent downgoing baseband channel submatrix Singular matrix ViPreceding RI row, i ∈ [1, NP], NP be aerial panel quantity；
Second value range subelement, if it is determined that meet N≤RI≤Nt/2, then according to formula：G1=[diag { V1, V2,…,VNp/2},diag{VNp/2+1,VNp/2+2,…,VNp}]TConstruct the first intermediary matrix G1；Take the first intermediary matrix G1's Preceding RI row construct the two level pre-coding matrix W, i.e.,：W=G1 (RI), wherein diag { V1,V2,…,VNp/2Indicate with V1, V2,…,VNp/2For block diagonal element structural matrix, remaining element is 0, diag { VNp/2+1,VNp/2+2,…,VNpIndicate with VNp/2+1,VNp/2+2,…,VNpFor block diagonal element structural matrix, remaining element is 0；
Third value range subelement, for if it is determined that meeting Nt/2≤RI, then according to formula：G2=diag { V1, V2,…,VNp, construct the second intermediary matrix G2：RI row construct the two level pre-coding matrix W before taking second intermediary matrix, I.e.：W=G2 (RI)。
On the basis of the various embodiments described above, the two level pre-coding matrix further includes：
4th value range subelement, for if it is determined that meet RI≤N, then calculating equivalent downgoing baseband channel The average value of preceding RI singular value in matrixAnd select maximumBefore corresponding right singular matrix RI row construction two level pre-coding matrixes：Wherein VoptFor with maximumThe corresponding right side is unusual Matrix, in W,It repeats Np times；
5th value range subelement, for if it is determined that meet N≤RI≤Nt/2, then calculating the equivalent downgoing baseband The average value of preceding RI singular value in channel submatrix selects right singular matrix corresponding with maximum average value to construct VoptThird Intermediary matrix G3, and take the third intermediary matrix G3Preceding RI row construction two level pre-coding matrix W, specific formula are：G3= [diag{Vopt,Vopt,…,Vopt},diag{Vopt,Vopt,…,Vopt}]T, W=G3 (RI)；Wherein, in G3In diag { Vopt, Vopt,…,Vopt, VoptIt repeats Np/2 times；
6th value range subelement, for if it is determined that meeting Nt/2≤RI, then equivalent downgoing baseband channel to be stated in calculating The average value of preceding RI singular value in submatrix selects right singular matrix V corresponding with maximum average valueoptIt constructs among the 4th Matrix G4, take the 4th intermediary matrix VoptPreceding RI row construction two level pre-coding matrix W, specific formula are：G4=diag { Vopt, Vopt,…,Vopt, W=G4 (RI)；Wherein, in G4In diag { Vopt,Vopt,…,Vopt, VoptIt repeats Np times.
A kind of incoherent processing unit for multi-antenna signal that the embodiment of the present invention is provided can be used for executing the present invention A kind of incoherent processing method for multi-antenna signal that embodiment is provided, has corresponding function and advantageous effect.Not at this The technical detail of detailed description in embodiment, reference can be made to the incoherent processing for the multi-antenna signal that any embodiment of the present invention provides Method.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation, It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.

Claims (10)

1. a kind of incoherent processing method of multi-antenna signal, which is characterized in that including：
Instruction terminal feeds back order instruction parameter, and the order instruction parameter list shows data transfer layer number；
Initial signal is obtained, carrying out level-one precoding to the initial signal according to the first coding rule obtains level encoder letter Number, wherein the initial signal is that the output signal after layer mapping is carried out according to aerial panel quantity；
It is prelisted according to the order instruction parameter, aerial panel port number and the antenna for base station port number construction two level that receive Code matrix；
According to the two level pre-coding matrix to the level encoder signal processing, complete to the incoherent pre- of the initial signal Coding.
2. incoherent processing method according to claim 1, which is characterized in that it is described according to the first coding rule to described Initial signal carries out level encoder and obtains level encoder signal, including：
Level encoder is carried out to the initial signal according to the coding rule for sending diversity and obtains level encoder signal.
3. the incoherent processing method of multi-antenna signal according to claim 1, which is characterized in that the basis receives The order instruction parameter, aerial panel port number and antenna for base station port number construct two level pre-coding matrix, including：
When the network mode of base station and terminal room is tdd mode, SRS signal is obtained, up channel square is estimated according to SRS signal Battle array, equivalent downgoing baseband channel matrix is obtained according to the up channel matrix；
The equivalent downgoing baseband channel matrix is split to obtain according to aerial panel quantity corresponding with different antennae panel Equivalent downgoing baseband channel submatrix；
Singular value decomposition is carried out to each equivalent downgoing baseband channel submatrix and obtains the right side of each equivalent down channel submatrix Singular matrix；
Two level is constructed according to the right singular matrix, order instruction parameter, aerial panel port number and antenna for base station port number Pre-coding matrix.
4. the incoherent processing method of multi-antenna signal according to claim 3, which is characterized in that described according on described Row channel matrix obtains equivalent downgoing baseband channel matrix, including：
The product of up channel matrix and chain calibration matrix is calculated, and down channel matrix is obtained according to channel reciprocity；
If base station has the function of analog beam figuration, analog beam figuration is carried out to the down channel matrix and converts to obtain Imitate downgoing baseband channel matrix；
If the base station does not have analog beam figuration function, using the down channel matrix as equivalent downgoing baseband channel Matrix.
5. the incoherent processing method of multi-antenna signal according to claim 3, which is characterized in that unusual according to the right side Matrix V, order instruction parameter RI, aerial panel port number N and antenna for base station port number Nt construct the two level precoding square Battle array W, including：
If it is determined that meeting RI≤N, then according to formulaConstruct the two level pre-coding matrix W, whereinExpression takes right singular matrix V corresponding with i-th of equivalent downgoing baseband channel submatrixiPreceding RI row, i ∈ [1, NP], NP are aerial panel quantity；
If it is determined that meeting N≤RI≤Nt/2, then according to formula：
G1=[diag { V1,V2,…,VNp/2},diag{VNp/2+1,VNp/2+2,…,VNp}]TConstruct the first intermediary matrix G1；
Take the first intermediary matrix G1Preceding RI row construct the two level pre-coding matrix W, i.e.,：W=G1 (RI), wherein diag {V1,V2,…,VNp/2Indicate with V1,V2,…,VNp/2For block diagonal element structural matrix, remaining element is 0, diag { VNp/2+1, VNp/2+2,…,VNpIndicate with VNp/2+1,VNp/2+2,…,VNpFor block diagonal element structural matrix, remaining element is 0；
If it is determined that meeting Nt/2≤RI, then according to formula：G2=diag { V1,V2,…,VNp, construct the second intermediary matrix G2：
RI row construct the two level pre-coding matrix W before taking second intermediary matrix, i.e.,：W=G2 (RI)。
6. the incoherent processing method of multi-antenna signal according to claim 3, which is characterized in that unusual according to the right side Matrix V, order instruction parameter RI, aerial panel port number N and antenna for base station port number Nt construct the two level precoding square Battle array W, including：
If it is determined that meeting RI≤N, then the average value of preceding RI singular value in the equivalent downgoing baseband channel submatrix is calculatedAnd select maximumThe preceding RI row construction two level pre-coding matrixes of corresponding right singular matrix：Wherein VoptFor with maximumCorresponding right singular matrix, in W,Repeat Np It is secondary；
If it is determined that meeting N≤RI≤Nt/2, then preceding RI singular value in the equivalent downgoing baseband channel submatrix is calculated Average value selects right singular matrix corresponding with maximum average value to construct VoptThird intermediary matrix G3, and take among the third Matrix G3Preceding RI row construction two level pre-coding matrix W, specific formula are：
G3=[diag { Vopt,Vopt,…,Vopt},diag{Vopt,Vopt,…,Vopt}]T, W=G3 (RI)；
Wherein, in G3In diag { Vopt,Vopt,…,Vopt, VoptIt repeats Np/2 times；
If it is determined that meet Nt/2≤RI, then calculates and state being averaged for preceding RI singular value in equivalent downgoing baseband channel submatrix Value selects right singular matrix V corresponding with maximum average valueoptConstruct the 4th intermediary matrix G4, take the 4th intermediary matrix VoptPreceding RI row construction two level pre-coding matrix W, specific formula are：
G4=diag { Vopt,Vopt,…,Vopt, W=G4 (RI)；
Wherein, in G4In diag { Vopt,Vopt,…,Vopt, VoptIt repeats Np times.
7. a kind of incoherent processing unit of multi-antenna signal, which is characterized in that including：
Parameter configuration module is sent, terminal feedback order instruction parameter is used to indicate, the order instruction parameter list shows data transfer layer Number；
Level-one precoded signal acquisition module, for obtaining initial signal, according to the first coding rule to the initial signal into Row level-one precoding obtains level encoder signal, wherein the initial signal is after carrying out layer mapping according to aerial panel quantity Output signal；
Two level pre-coding matrix constructing module, for according to receive the order instruction parameter, aerial panel port number and Antenna for base station port number constructs two level pre-coding matrix；
Relevant precoding module, for, to the level encoder signal processing, being completed to institute according to the two level pre-coding matrix State the incoherent precoding of initial signal.
8. incoherent processing unit according to claim 7, which is characterized in that the level-one pre-coding matrix computing module Including：
Diversity coding unit is sent, is obtained for carrying out level encoder to the initial signal according to the coding rule for sending diversity Level encoder signal.
9. incoherent processing unit according to claim 7, which is characterized in that the two level pre-coding matrix constructing module Including：
Equivalent downgoing baseband channel matrix acquiring unit, for when the network mode of base station and terminal room is tdd mode, obtaining SRS signal estimates up channel matrix according to SRS signal, equivalent downgoing baseband channel is obtained according to the up channel matrix Matrix；
Equivalent downgoing baseband channel submatrix acquiring unit is used for according to aerial panel quantity to the Equivalent Base-Band channel matrix It is split to obtain equivalent downgoing baseband channel submatrix corresponding with different antennae panel；
Singular value decomposition unit, it is each equivalent for being obtained to each equivalent downgoing baseband channel submatrix progress singular value decomposition The right singular matrix of downgoing baseband channel submatrix；
Two level pre-coding matrix structural unit, for according to the right singular matrix, order instruction parameter, aerial panel port number Two level pre-coding matrix is constructed with antenna for base station port number.
10. incoherent processing unit according to claim 9, which is characterized in that the Equivalent Base-Band channel matrix obtains Unit includes：
Down channel matrix acquisition subelement, the product for calculating up channel matrix and chain calibration matrix, and according to letter Road reciprocity obtains down channel matrix；
Equivalent downgoing baseband channel obtains the first subelement, if having the function of analog beam figuration for base station, under described Row channel matrix carries out analog beam figuration and converts to obtain equivalent downgoing baseband channel matrix；
Equivalent downgoing baseband channel obtains the second subelement, will be described if not having analog beam figuration function for base station Down channel matrix is as equivalent downgoing baseband channel.
CN201710127698.7A 2017-03-06 2017-03-06 A kind of incoherent multi-antenna transmission method and device Pending CN108540189A (en)

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CN111278089A (en) * 2019-01-08 2020-06-12 维沃移动通信有限公司 Antenna panel control method, terminal equipment and network side equipment
CN111555850A (en) * 2019-02-12 2020-08-18 中国移动通信有限公司研究院 DMRS configuration method, device and computer readable storage medium
CN113196865A (en) * 2018-12-14 2021-07-30 株式会社Ntt都科摩 User terminal and wireless communication method
CN113938165A (en) * 2020-07-14 2022-01-14 青岛海信电子产业控股股份有限公司 Antenna adaptation method and user equipment
CN115065386A (en) * 2022-06-10 2022-09-16 杭州红岭通信息科技有限公司 Beamforming optimization method and device based on ZF and SVD hybrid precoding

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113196865A (en) * 2018-12-14 2021-07-30 株式会社Ntt都科摩 User terminal and wireless communication method
CN111278089A (en) * 2019-01-08 2020-06-12 维沃移动通信有限公司 Antenna panel control method, terminal equipment and network side equipment
CN111278089B (en) * 2019-01-08 2021-10-12 维沃移动通信有限公司 Antenna panel control method, terminal equipment and network side equipment
US12095167B2 (en) 2019-01-08 2024-09-17 Vivo Mobile Communication Co., Ltd. Antenna panel control method, terminal device, and network side device
CN111555850A (en) * 2019-02-12 2020-08-18 中国移动通信有限公司研究院 DMRS configuration method, device and computer readable storage medium
CN113938165A (en) * 2020-07-14 2022-01-14 青岛海信电子产业控股股份有限公司 Antenna adaptation method and user equipment
CN113938165B (en) * 2020-07-14 2023-04-25 青岛海信电子产业控股股份有限公司 Antenna adaptation method and user equipment
CN115065386A (en) * 2022-06-10 2022-09-16 杭州红岭通信息科技有限公司 Beamforming optimization method and device based on ZF and SVD hybrid precoding
CN115065386B (en) * 2022-06-10 2023-11-17 杭州红岭通信息科技有限公司 Beam forming optimization method and device based on ZF and SVD mixed precoding

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