CN102957467B - The signal processing method and system of multiple antennas in a kind of downlink system - Google Patents
The signal processing method and system of multiple antennas in a kind of downlink system Download PDFInfo
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Abstract
The invention provides the signal processing method and system of multiple antennas in a kind of downlink system, including：When handling transmission signal, base station according to down channel it is long when channel information, cyclic prefix codeword set is determined, according to the mode of cyclic prefix and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and demodulated reference signal (DMRS).Using the present invention, for highspeed user's equipment (UE), the performance that signal transmits can be effectively improved.
Description
Technical field
The present invention relates to the signal processing technology of multiple antennas, a kind of signal transacting of multiple antennas in downlink system is particularly related to
Method and system.
Background technology
It is configured with a base station in Long Term Evolution (LTE, Long term evolution) system of multiple antennas, for
Low speed user equipment (UE, User Equipment), it will usually in the codebook selection and to base station feedback precoding index (PMI,
Precoding Matrix Index), channel quality index (CQI, Channel Quality Index) and order index
(RI, Rank Indicator), weights of the precoding as transmitting antenna corresponding to the PMI of base station feedback.This mode
Premise be：The channel variation that precoding progress signal corresponding to UE feedbacks PMI to base station use was launched in this period is little,
This is satisfiable for low speed UE.But for the UE of high-speed mobile, because channel variation is fast, now, when UE feeds back
Channel when channel corresponding to the PMI of the selection and CQI calculated based on PMI sends signal with base station can mismatch, if base station
The PMI and CQI of feedback are continuing with, then can cause performance loss.Therefore, in this case, more days of generally use open loop
The method of line improves signal quality.
The basic thought of the method for open loop multi-antenna is：Base station cyclically uses power of one group of precoding as transmitting antenna
Value, the data on running time-frequency resource to distributing to UE are transmitted.Wherein, running time-frequency resource unit corresponding to each precoding can be with
It is one or more of subframe subcarrier, can also be Physical Resource Block (PRB, Physical Resource
Block) or using identical precoding several continuous physical resource blocks (PRB bundling).The purpose is to pass through
The multiple running time-frequency resource units for distributing to UE, such as PRB, it is transmitted in multiple beam directions that precoding is formed, makes letter
Ergodic (Ergodic) is presented in road, so as to reach the effect of diversity.In the transmission of the versions of LTE the 8th (R8, Release 8)
In pattern 3 (TM3, Transmission Mode 3), when RI is more than 2, the precoding of Open-Loop Spatial Multiplexing can be expressed as：
Wherein, x(v)(i) data of the v layers on i-th of subcarrier before precoding, y are represented(p-1)(i) i-th of son is represented
The data on p-th of antenna on carrier wave after precoding, U represent dimension υ × υ discrete Fourier transform (DFT, Discrete
Fourier Transform) matrix, D (i) expression dimensions υ × υ diagonal matrix, it is possible to achieve cyclic delay diversity, its kth
Individual diagonal element is e-j2π(k-1)/v, W (i) is represented and encoder matrix, W (i)=Ck, k=1 ..., 4, it is that PMI is in code book
12nd, 13,14,15 orthogonal one group pre-coding matrix, and k and i, v relation are：On
State formula to show, sub- W (i) of carrier transformation per v.
In LTE R10, because the antenna number of base station can increase to 8 antennas, therefore, 8 new antenna codebooks are devised.
8 antenna codebooks employ the structure of dicode sheet, i.e.,：One code word contain with time relatively slow change it is long when (long-term)
PMI components i1With (short-term) the in short-term PMI components i with time relatively fast change2.The design of TE R10 8 antenna codebooks is adopted
With GoB (wave beam lattice, Grid of Beam) mode, GoB be by one group 4 tie up two polarised directions of DFT vectors combine and
Into.For the code word that the number of plies is 1, i.e. RI=1, an i1Correspond to 4 DFT vectors, two polarised directions are combined into 16
Individual beamlet, correspond respectively to 16 i2Call number.The code word of other numbers of plies is chosen and number of plies phase on the basis of 1 layer of code word
Corresponding beamlet adds a phase factor between a different polarised directions, forms the code book of different layers, and i1And i2
Number have difference for each layer, specific process refers to 3GPP LTER10 agreements 36.211v10.0.0
6.3.4.2.3 section.
In addition, in LTE R10, except public reference signal (CRS, the Common Reference used in legacy version
Signal outside), also newly introduce downlink demodulation reference signal (DMRS, DeModulation Reference Signal) and
Channel state information reference signals (CSI-RS, Channel Status Information Reference Signal).Its
In, DMRS in the case where UE does not know the precoding that base station uses, can realize the demodulation of data channel, and CSI-RS can be with
UE measurements are made to obtain more accurately channel information.
In LTE R10, divided ring space multiplexing technique is not strengthened, especially newly-increased TM9, mainly pin
To closed loop mode design.That is, in existing Open-Loop Spatial Multiplexing technology, still using 4 fixed orthogonal codes
For word as the precoding recycled, base station does not know UE any channel information, the transmission mode of this open loop completely or not
Although not needing UE feedback information, the improvement of the signal transmission performance to high speed UE is can be achieved with, due to 8 antenna codes
This is the structure of dicode sheet, and therefore, existing Open-Loop Spatial Multiplexing technology can not fully support the configuration of 8 transmitting antennas and dicode sheet
Structure, for example for, it is impossible to improve signal transmission performance using channel information during long in dicode sheet, also,
High speed UE performance can not be strengthened using DMRS well.
The content of the invention
In view of this, it is a primary object of the present invention to provide in a kind of downlink system the signal processing method of multiple antennas and
System, for high speed UE, the performance that signal transmits can be effectively improved.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of transmission signal processing method of multiple antennas in downlink system, this method includes：
When handling transmission signal, base station according to down channel it is long when channel information, determine cyclic prefix code word set
Close；
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination, transmitting data and DMRS are carried out pre-
Coding.
In such scheme, the down channel it is long when channel information include：PMI components and RI when long.
In such scheme, it is described according to down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to it is long when PMI components, selected according to the selection mode pre-set in code book corresponding to the order indicated by RI
Corresponding PMI components in short-term；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as circulation and prelist when will be long
Code codeword set.
In such scheme, it is determined that during cyclic prefix codeword set, this method further comprises：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, PMI components institute when will be long is selected
All code words indicated, are defined as cyclic prefix codeword set.
In such scheme, when carrying out precoding to transmitting data and DMRS, this method further comprises：
When the running time-frequency resource granularity for carrying out cyclic prefix is subcarrier, using in the cyclic prefix codeword set
Pre-encoding codeword part component to DMRS carry out precoding；
When the running time-frequency resource granularity for carrying out cyclic prefix is PRB, using in the cyclic prefix codeword set
Pre-encoding codeword carries out precoding to DMRS.
In such scheme, the part component pair of the pre-encoding codeword using in the cyclic prefix codeword set
DMRS carries out precoding, is：
When codebook structure is W=W1W2When, using W1Precoding is carried out to DMRS；Wherein, W2Represent with sub-carrier variations
The component of code word.
In such scheme, this method further comprises：
When need obtain greater angle extension beam coverage when, base station according to the down channel it is long when channel
Information, PMI components when selecting more than one adjacent long, by selection more than one it is adjacent long when PMI components, described descending
Channel it is long when channel information in it is long when PMI components and according to the selection mode pre-set, when identified each long
The corresponding all code words indicated by PMI components in short-term of PMI components, are defined as cyclic prefix codeword set.
In such scheme, the selection more than one it is adjacent long when PMI components, be：
Base station is according to UE speed and the correlation of channel, PMI points when selecting more than one adjacent long in the codebook
Amount；Or
Base station is according to the selection mode pre-set, PMI components when selecting more than one adjacent long in the codebook；Or
Person,
UE determine the down channel it is long when channel information in it is long when PMI components it is adjacent long when PMI components, and
By the down channel of determination it is long when channel information in it is long when PMI components it is adjacent long when PMI components be sent to base
Stand；Base station by the down channel received it is long when channel information in it is long when PMI components adjacent long when PMI components, make
PMI components when adjacent long for more than one of selection.
In such scheme, the down channel by determination it is long when channel information in it is long when PMI components phase
PMI components are sent to base station when adjacent long, are：
By the down channel of determination it is long when channel information in it is long when PMI components it is adjacent long when PMI components
By bitmap modes or the mode of the merging mode configuration index number pre-set, base station is sent to.
In such scheme, base station according to down channel it is long when channel information, determine cyclic prefix codeword set it
Before, this method further comprises：
Base station obtain the down channel it is long when channel information.
In such scheme, the base station obtain the down channel it is long when channel information, be：
Down channel described in UE to base station feedback it is long when channel information；Or base station utilizes channel heterogeneite, in measurement
Row channel, obtain the down channel it is long when channel information.
In such scheme, channel described in UE to base station feedback it is long when channel information when, this method further comprises：
UE use Closed-Loop Spatial Multiplexing Report mode, to channel described in base station feedback it is long when channel information；Or
Physical uplink control channel (PUCCH, Physical Uplink Control CHannel) or physical uplink link traffic
In channel (PUSCH, Physical Uplink Service CHannel), PMI components when reporting long to base station, broadband CQI,
And RI；When the order indicated by RI is more than 2, the differential CQI of the second code word is further reported to base station.
Present invention also offers a kind of method for processing received signal of multiple antennas in downlink system, this method includes：
When handling reception signal, channel information when UE is according to long with base station identical down channel, it is determined that circulation is pre-
Coding codeword set；
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination used by base station, carry out CQI's
Calculating and the demodulation of reception signal.
In such scheme, the foundation and base station identical down channel it is long when channel information, determine cyclic prefix
Codeword set, it is：
According to base station identical it is long when PMI components, be semi-statically configured according to the selection mode pre-set or by base station
Selection mode is simultaneously known by wireless heterogeneous networks (RRC, Radio Resource Control) signaling of base station transmission
Selection mode, with the order indicated by the identical RI of base station corresponding to corresponding PMI components in short-term of selection in code book；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as circulation and prelist when will be long
Code codeword set.
In such scheme, it is determined that during cyclic prefix codeword set, this method further comprises：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, PMI components institute when will be long is selected
All code words indicated, are defined as cyclic prefix codeword set.
In such scheme, when carrying out CQI calculating, this method further comprises：
Frequency resource granularity during precoding is also carried out based on base station simultaneously, utilizes CRS, and/or CSI-RS, and/or DMRS
It is upper to measure obtained channel information, calculate CQI.
In such scheme, when carrying out the demodulation of reception signal, this method further comprises：
UE obtains cyclic prefix code word when base station to DMRS use during precoding by measuring DMRS
Whole or portion corresponding to the component of pre-encoding codeword in set or the pre-encoding codeword in the cyclic prefix codeword set
Divide equivalent channels information.
In such scheme, after obtaining equivalent channels information corresponding to DMRS, this method further comprises：
If the equivalent channels information for measuring to obtain on DMRS includes whole equivalent channels informations, will be measured on DMRS
The equivalent channels information arrived, the whole equivalent channels informations used as demodulation；
If the equivalent channels information for measuring to obtain on DMRS includes part equivalent channels information, will be measured on DMRS
The mode of cyclic prefix and the cyclic prefix codeword set pair of determination used by the equivalent channels information arrived and base station
The equivalent channels information answered merges, and believes the equivalent channels information after merging as whole equivalent channels that demodulation uses
Breath.
In such scheme, this method further comprises：
When need obtain greater angle extension beam coverage when, UE according to the down channel it is long when channel believe
Breath, PMI components when selecting more than one adjacent long, by selection more than one it is adjacent long when PMI components, the descending letter
Road it is long when channel information in it is long when PMI components and according to predetermined selection mode determine it is selected each long when PMI points
The corresponding all code words indicated by PMI components in short-term of amount, are defined as cyclic prefix codeword set；
The predetermined selection mode, it is：The selection mode that is pre-configured with is semi-statically configured selection mode simultaneously by base station
UE selection mode is sent to by RRC signaling.
In such scheme, the selection more than one it is adjacent long when PMI components, be：
Base station is referred to by RRC signaling, and/or Downlink Control Information (DCI, Downlink Control Information)
Show selected by UE more than one it is adjacent long when PMI components；Or
UE is according to the selection mode pre-set, PMI components when selecting more than one adjacent long in the codebook；Or
UE is according to the speed of itself and the correlation of channel, PMI points when selecting more than one adjacent long in the codebook
Amount.
In such scheme, UE according to base station identical down channel it is long when channel information, determine cyclic prefix
Before codeword set, this method further comprises：
UE is by measuring down channel, channel information when obtaining described and base station identical down channel long.
Invention further provides a kind of transmission signal processing equipment of multiple antennas in downlink system, the device includes：First
Determining module and precoding module；Wherein,
First determining module, for when handling transmission signal, base station according to down channel it is long when channel information, it is determined that
Cyclic prefix codeword set, and the cyclic prefix codeword set of determination is sent to precoding module；
Precoding module, for receive the first determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS.
In such scheme, first determining module, it is additionally operable to when the wave cover model for needing acquisition greater angle extension
When enclosing, according to the down channel it is long when channel information, PMI components when selecting more than one adjacent long, by the one of selection
PMI components when adjacent long more than individual, the down channel it is long when channel information in it is long when PMI components and according to pre-
The selection mode first set, PMI components corresponding all code words indicated by PMI components in short-term when identified each long, it is determined that
For cyclic prefix codeword set.
In such scheme, the device further comprises the first acquisition module, for obtain the down channel it is long when believe
Road information, and by the down channel of acquisition it is long when channel information be sent to the first determining module；
First determining module, be additionally operable to receive the first acquisition module send the down channel it is long when channel believe
Breath.
Invention further provides a kind of reception signal processing unit of multiple antennas in downlink system, the device includes：Second
Determining module, CQI computing modules and demodulation module；Wherein,
Second determining module, for when handling reception signal, channel during according to long with base station identical down channel
Information, cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules and solution
Mode transfer block；
CQI computing modules, for receive the second determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out CQI calculating used by base station；
Demodulation module, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out the demodulation of reception signal used by standing.
In such scheme, second determining module, it is additionally operable to need the beam coverage for obtaining greater angle extension
When, according to the down channel it is long when channel information, PMI components when selecting more than one adjacent long, by one of selection
More than it is adjacent long when PMI components, the down channel it is long when channel information in it is long when PMI components and according to predetermined
Selection mode determine it is selected each long when the corresponding all code words indicated by PMI components in short-term of PMI components, be defined as following
Ring pre-encoding codeword set；
The predetermined selection rule, it is：The selection mode that is pre-configured with is semi-statically configured selection mode simultaneously by base station
UE selection mode is sent to by RRC signaling.
In such scheme, the device further comprises：Second acquisition module, for by measuring down channel, obtaining institute
Channel information when stating long with base station identical down channel, and believe when will obtain long with base station identical down channel
Road information is sent to the second determining module；
Second determining module, it is additionally operable to receive the described and base station identical down channel that the second acquisition module is sent
It is long when channel information.
Present invention also offers a kind of signal processing system of multiple antennas in downlink system, the system includes：Downlink system
The reception signal processing unit of multiple antennas in the transmission signal processing equipment and downlink system of middle multiple antennas；More days in downlink system
The transmission signal processing equipment of line further comprises：First determining module and precoding module；Multiple antennas connects in downlink system
Signal processing apparatus is received to further comprise：Second determining module, CQI computing modules and demodulation module；Wherein,
First determining module, for when handling transmission signal, base station according to down channel it is long when channel information, it is determined that
Cyclic prefix codeword set, and the cyclic prefix codeword set of determination is sent to precoding module；
Precoding module, for receive the first determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS；
Second determining module, for when handling reception signal, channel during according to long with base station identical down channel
Information, cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules and solution
Mode transfer block；
CQI computing modules, for receive the second determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out CQI calculating used by base station；
Demodulation module, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out the demodulation of reception signal used by standing.
In such scheme, first determining module, it is additionally operable to when the wave cover model for needing acquisition greater angle extension
When enclosing, according to the down channel it is long when channel information, PMI components when selecting more than one adjacent long, by the one of selection
PMI components when adjacent long more than individual, the down channel it is long when channel information in it is long when PMI components and according to pre-
The selection mode first set, PMI components corresponding all code words indicated by PMI components in short-term when identified each long, it is determined that
For cyclic prefix codeword set；And/or
Second determining module, when being additionally operable to need to obtain the beam coverage of greater angle extension, according to described
Down channel it is long when channel information, PMI components when selecting more than one adjacent long, by more than one adjacent length of selection
When PMI components, the down channel it is long when channel information in it is long when PMI components and true according to predetermined selection mode
PMI components corresponding all code words indicated by PMI components in short-term when fixed selected each long, are defined as cyclic prefix code word
Set；
The predetermined selection rule, it is：The selection mode that is pre-configured with is semi-statically configured selection mode simultaneously by base station
UE selection mode is sent to by RRC signaling.
In such scheme, the reception signal processing unit of multiple antennas further comprises in the downlink system：First obtains
Module, for obtain the down channel it is long when channel information, and by the down channel of acquisition it is long when channel information
It is sent to the first determining module；
First determining module, be additionally operable to receive the first acquisition module send the down channel it is long when channel believe
Breath；And/or
The reception signal processing unit of multiple antennas further comprises in the downlink system：Second acquisition module, for leading to
Measurement down channel is crossed, channel information when obtaining described and base station identical down channel long, and described and base station will be obtained
Identical down channel it is long when channel information be sent to the second determining module；
Second determining module, it is additionally operable to receive the described and base station identical down channel that the second acquisition module is sent
It is long when channel information.
The signal processing method and system of multiple antennas in downlink system provided by the invention, when handling transmission signal, base
Stand according to down channel it is long when channel information, determine cyclic prefix codeword set；According to cyclic prefix mode and really
Fixed cyclic prefix codeword set, precoding is carried out to transmitting data and DMRS；When handling reception signal, UE foundations and base
Identical of standing down channel it is long when channel information, determine cyclic prefix codeword set；It is pre- according to circulation used by base station
The mode of coding and the cyclic prefix codeword set of determination, carry out CQI calculating and the demodulation of reception signal, in this way, for
High speed UE, the performance of signal transmission can be effectively improved.
In addition, when need obtain greater angle extension beam coverage when, according to down channel it is long when channel believe
Breath, PMI components i when selecting more than one adjacent long1, by selection more than one it is adjacent long when PMI components i1It is and each adjacent
It is long when PMI components i1The corresponding components of PMI in short-term i2Indicated all code words, are defined as cyclic prefix codeword set, such as
This, can further improve the performance of signal transmission.
In addition, obtained equivalent channels information will be measured from DMRS, the part equivalent channel used as demodulation
Information or whole equivalent channels informations, in this way, the performance of demodulation can be effectively improved.
Brief description of the drawings
Fig. 1 is the method flow schematic diagram of the transmission signal processing of multiple antennas in downlink system of the present invention；
Fig. 2 is the method flow schematic diagram of the reception signal processing of multiple antennas in downlink system of the present invention；
Fig. 3 is the method schematic diagram of the signal transacting of multiple antennas in downlink system provided by the invention；
Fig. 4 is the schematic diagram of cyclic prefix in embodiment one；
Fig. 5 be embodiment one in antenna to DMRS mapping mode schematic diagram；
Fig. 6 is the structural representation of R10 feedback models 1-1 subpattern in example IV；
Fig. 7 is the apparatus structure schematic diagram of the transmission signal processing of multiple antennas in downlink system of the present invention；
Fig. 8 is the apparatus structure schematic diagram of the reception signal processing of multiple antennas in downlink system of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.
The present invention basic thought be：When handling transmission signal, base station according to down channel it is long when channel information, really
Determine cyclic prefix codeword set；According to the mode of cyclic prefix and the cyclic prefix codeword set of determination, to launching number
Precoding is carried out according to DMRS；When handling reception signal, UE according to base station identical down channel it is long when channel information,
Determine cyclic prefix codeword set；According to the mode of cyclic prefix and the cyclic prefix code word of determination used by base station
Set, carries out CQI calculating and the demodulation of reception signal.
The transmission signal processing method of multiple antennas in downlink system of the present invention, as shown in figure 1, comprising the following steps：
Step 101：When handling transmission signal, base station according to down channel it is long when channel information, it is determined that circulation prelist
Code codeword set；
Here, the down channel refers to：Base station sends channel used in data to UE；The down channel it is long when
Channel information includes：PMI components i when long1And RI.
It is described according to down channel it is long when channel information, determine cyclic prefix codeword set, be specially：
According to it is long when PMI components i1, selected according to the selection mode pre-set in code book corresponding to the order indicated by RI
Select corresponding PMI components i in short-term2；
PMI components i when will be long1And the corresponding PMI components i in short-term of selection2Indicated all code words, are defined as circulating
Pre-encoding codeword set；
Wherein, corresponding PMI components i in short-term is selected in code book corresponding to the order indicated by RI2When, selected is corresponding
The components of PMI in short-term i2Can be whole in code book PMI components i in short-term2Or the PMI components in short-term of the part in code book
i2；Here it is possible to foundation is it needs to be determined that be the whole PMI components i in short-term of selection2, or selected section PMI components i in short-term2, specifically
Ground, can determine it is the whole PMI components i in short-term of selection by emulation experiment according to the quality for the signal transmission for needing to reach2,
Or selected section PMI components i in short-term2, and selection mode is configured on base station, the selection mode of configuration can be specifically：
Fixed uses the several components of the PMI in short-term i of certain in code book2, or, Ke Yishi：At regular intervals, it is transformed into using other
The fixed several components of PMI in short-term i2, the selection mode of this configuration is properly termed as the selection mode being semi-statically configured；Wherein,
The concrete processing procedure that selection is carried out by emulation experiment is the conventional techniques of those skilled in the art, no longer superfluous here
State.
It is determined that during cyclic prefix codeword set, this method can further include：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, PMI components i when will be long is selected1
Indicated all code words, are defined as cyclic prefix codeword set；Wherein, the order indicated by the RI be more than 4, that is,
Say, the order indicated by RI is 5,6,7,8, now, due to not including PMI components i in short-term in LTE R10 8 antenna codebooks2, because
This, selects PMI components i when will be long1Indicated all code words, are defined as cyclic prefix codeword set.
Before this step, this method can further include：
Base station obtain the down channel it is long when channel information；
Specifically, down channel described in UE to base station feedback it is long when channel information；Or base station utilizes channel inequality
Property, measure up channel, obtain the down channel it is long when channel information；Wherein, UE can be obtained by measuring down channel
The down channel it is long when channel information；When downlink system is time division duplex (TDD, Time Division
Duplexing) during system, base station can utilize channel heterogeneite, measure up channel, obtain the down channel it is long when believe
Road information；Here, UE obtain the down channel it is long when channel information concrete processing procedure can use prior art；Base station
Obtain the down channel it is long when channel information concrete processing procedure be prior art, repeat no more here.
Channel described in UE to base station feedback it is long when channel information when, this method can further include：
UE use Closed-Loop Spatial Multiplexing transmission mode, to channel described in base station feedback it is long when channel information；Or week
Increase a kind of new Report Type in phase Report mode, specifically, in PUCCH or PUSCH, PMI when reporting long
Component i1, broadband CQI and RI；When the order indicated by RI is more than 2, the differential CQI of the second code word is further reported；Wherein,
The concrete processing procedure of the transmission mode of the Closed-Loop Spatial Multiplexing and the transmission mould of the Closed-Loop Spatial Multiplexing defined in LTE R10
The concrete processing procedure of formula is identical.CQI effect is identical with prior art, and how base station uses CQI process
It is not the content that the present invention is concerned about.
Step 102：According to the mode of cyclic prefix and the cyclic prefix codeword set of determination, to transmitting data and
DMRS carries out precoding；
Here, when carrying out precoding to transmitting data, base station is entered using the data on precoding WD (i) U sub-carriers i
Row precoding, wherein, D (i) represents dimension υ × υ diagonal matrix, and D (i) k-th of diagonal element is e-j2π(k-1)/v, U expressions
Dimension υ × υ DFT matrixes, v represent the number of plies of RI instructions, and W represents that dimension is NT× v pre-coding matrix, NTRepresent base station
Transmitting antenna number, per v subcarrier or each PRB or multiple PRB convert a W；Here, concrete processing procedure is existing skill
Art, repeat no more here.
When carrying out precoding to transmitting data and DMRS, this method can further include：
Base station uses pre-encoding codeword or the cyclic prefix codeword set in the cyclic prefix codeword set
In pre-encoding codeword component to DMRS carry out precoding；Wherein, when the running time-frequency resource granularity for carrying out cyclic prefix is son
During carrier wave, precoding is carried out to DMRS using the part component of the pre-encoding codeword in the cyclic prefix codeword set, when
When the running time-frequency resource granularity for carrying out cyclic prefix is PRB, using the pre-encoding codeword in the cyclic prefix codeword set
Precoding is carried out to DMRS；
Wherein, the part component of the pre-encoding codeword using in the cyclic prefix codeword set is carried out to DMRS
Precoding, it is specially：
When codebook structure is W=W1W2When, using W1Precoding is carried out to DMRS；Wherein, W2Represent with sub-carrier variations
The component of code word.
It is determined that cyclic prefix mode when, can according to the cyclic prefix codeword set of determination, circulate it is pre-
Running time-frequency resource granularity, the resource quantity and DMRS precoding modes of distribution of coding, determine the mode of cyclic prefix；
Wherein, running time-frequency resource granularity and the resource quantity of distribution are configured on base station in advance；The phase according to determination
Cyclic prefix codeword set, the running time-frequency resource granularity of progress cyclic prefix, the resource quantity of distribution and the DMRS answered is pre-
Coded system, the concrete processing procedure for determining the mode of cyclic prefix are the conventional techniques of those skilled in the art, this
In repeat no more.In practical application, predefined side can be used by determining the concrete processing procedure of the mode of cyclic prefix
Formula, i.e.,：Base station determines the mode of cyclic prefix in the way of the cyclic prefix being pre-configured with.
This method can further include：
When need obtain greater angle extension beam coverage when, base station according to the down channel it is long when channel
Information, PMI components i when selecting more than one adjacent long1, by selection more than one it is adjacent long when PMI components i1, it is described
Down channel it is long when channel information in it is long when PMIi1Component and according to the selection mode pre-set, it is identified each
PMI components i when long1Corresponding PMI components i in short-term2Indicated all code words, are defined as cyclic prefix codeword set；
Wherein, the selection more than one it is adjacent long when PMI components i1, it is specially：
Base station is according to UE speed and the correlation of channel, PMI points when selecting more than one adjacent long in the codebook
Measure i1；Or
Base station is according to the selection mode pre-set, PMI components i when selecting more than one adjacent long in the codebook1；Or
Person,
UE determine the down channel it is long when channel information in it is long when PMI components i1It is adjacent long when PMI components
i1, and by the down channel of determination it is long when channel information in it is long when PMI components i1It is adjacent long when PMI components i1
It is sent to base station；Base station by the down channel received it is long when channel information in it is long when PMI components i1Adjacent length
When PMI components i1, it is alternatively that more than one it is adjacent long when PMI components i1；
Wherein, the down channel by determination it is long when channel information in it is long when PMI components i1It is adjacent
PMI components i when long1Base station is sent to, is specially：
By the down channel of determination it is long when channel information in it is long when PMI components i1It is adjacent long when PMI points
Measure i1By bitmap modes or the mode of the merging mode configuration index number pre-set, base station is sent to；Base station passes through
Bitmap modes or the call number be would know that the determination that UE is sent the down channel it is long when channel information in length
When PMI components i1It is adjacent long when PMI components i1；Here, by bitmap modes, the described descending of determination is sent to base station
Channel it is long when channel information in it is long when PMI components i1It is adjacent long when PMI components i1Concrete processing procedure can use it is existing
There is technology.
When setting selection mode, it is necessary to consider UE speed and the correlation of channel, likewise, UE determine it is described under
Row channel it is long when channel information in it is long when PMI components i1It is adjacent long when PMI components i1When, it is necessary to consider UE speed,
And the correlation of channel, concrete processing procedure are the conventional techniques of those skilled in the art.When base station can pass through long
PMI components i1The frequency of renewal determines UE speed.
The concrete processing procedure that base station determines to need to obtain the opportunity of the beam coverage of greater angle extension is existing
Technology, repeat no more here.
The method for processing received signal of multiple antennas in downlink system of the present invention, as shown in Fig. 2 comprising the following steps：
Step 201：When handling reception signal, UE according to base station identical down channel it is long when channel information, really
Determine cyclic prefix codeword set；
Here, the down channel it is long when channel information include：PMI components i when long1And RI.
The foundation and base station identical down channel it is long when channel information, determine cyclic prefix codeword set, have
Body is：
According to base station identical it is long when PMI components i1, according to predetermined selection mode, signified with base station identical RI
Corresponding PMI components i in short-term is selected in code book corresponding to the order shown2；
PMI components i when will be long1And the corresponding PMI components i in short-term of selection2Indicated all code words, are defined as circulating
Pre-encoding codeword set；
Wherein, the predetermined selection mode, it is specially：The selection mode that is pre-configured with is semi-statically configured by base station
Selection mode and RRC signaling are sent to UE selection mode.
The PMI components i in short-term corresponding to selection in code book corresponding to the order indicated by RI2When, selected is corresponding short
When PMI components i2Can be whole in code book PMI components i in short-term2Or the PMI components i in short-term of the part in code book2；
Here it is possible to foundation is it needs to be determined that be the whole PMI components i in short-term of selection2, or selected section PMI components i in short-term2, specifically,
Can determine it is the whole PMI components i in short-term of selection by emulation experiment according to the quality for the signal transmission for needing to reach2, still
Selected section PMI components i in short-term2, and selection mode is configured on UE, wherein, the selection mode configured on UE and match somebody with somebody on base station
The selection mode put is identical；The concrete processing procedure that selection is carried out by emulation experiment is the usual of those skilled in the art
Technological means, repeat no more here.For being semi-statically configured selection mode by base station and UE selection being sent to by RRC signaling
Mode, specifically, base station at regular intervals, are transformed into using the several components of PMI in short-term i from last different fixation2,
And notify to determine therefrom that selection mode to UE, UE by RRC signaling；Here, it is necessary to which explanation is：The cyclic prefix that UE is determined
Codeword set is identical with the cyclic prefix codeword set that base station determines.
It is determined that during cyclic prefix codeword set, this method can further include：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, PMI components i when will be long is selected1
Indicated all code words, are defined as cyclic prefix codeword set；Wherein, the order indicated by the RI be more than 4, that is,
Say, the order indicated by RI is 5,6,7,8, now, due to not including PMI components i in short-term in LTE R10 8 antenna codebooks2, because
This, selects PMI components i when will be long1Indicated all code words, are defined as cyclic prefix codeword set.
Before this step, this method can further include：
UE is by measuring down channel, channel information when obtaining described and base station identical down channel long；Wherein, have
Body processing procedure can use prior art.
Step 202：According to the mode of cyclic prefix and the cyclic prefix codeword set of determination used by base station, enter
Row CQI calculating and the demodulation of reception signal；
Here, UE has known the mode of cyclic prefix used by base station in advance, such as, using predefined mode,
Know the mode of cyclic prefix used by base station, i.e.,：UE knows base station in the way of the cyclic prefix being pre-configured with
The mode of used cyclic prefix.
When carrying out CQI calculating, UE can also carry out frequency resource granularity during precoding based on base station simultaneously, utilize
Obtained channel information is measured on CRS, and/or CSI-RS, and/or DMRS, calculates CQI, wherein, calculate CQI specific processing
Process can use prior art.
When carrying out the demodulation of reception signal, this method can further include：
UE obtains cyclic prefix code word when base station to DMRS use during precoding by measuring DMRS
Whole or portion corresponding to the component of pre-encoding codeword in set or the pre-encoding codeword in the cyclic prefix codeword set
Divide equivalent channels information；
Wherein, if base station carries out during precoding the codebook structure that uses as W=W to DMRS1W2, then measured on DMRS
To equivalent channels information be：HW1；Wherein, W2The component of the code word in LTE R108 antenna codebooks with sub-carrier variations is represented,
W1Represent the part component of pre-encoding codeword that base station to DMRS use during precoding, H represents the antenna and UE of base station
Channel matrix between antenna, here, W1Can be specifically for NT×NTThe unit matrix I, N of dimensionTRepresent the transmitting antenna of base station
Number.
After obtaining equivalent channels information corresponding to DMRS, this method can further include：
If the equivalent channels information for measuring to obtain on DMRS includes whole equivalent channels informations, will be measured on DMRS
The equivalent channels information arrived, the whole equivalent channels informations used as demodulation；
If the equivalent channels information for measuring to obtain on DMRS includes part equivalent channels information, will be measured on DMRS
The mode of cyclic prefix and the cyclic prefix codeword set pair of determination used by the equivalent channels information arrived and base station
The equivalent channels information answered merges, and believes the equivalent channels information after merging as whole equivalent channels that demodulation uses
Breath；Here, determine used by the base station corresponding to the mode of cyclic prefix and the cyclic prefix codeword set of determination
The concrete processing procedure of equivalent channels information can use prior art, UE obtain used by base station the mode of cyclic prefix and
The method of equivalent channels information corresponding to the cyclic prefix codeword set of determination is properly termed as implicitly obtaining equivalent channels information
Method.
This method can further include：
When need obtain greater angle extension beam coverage when, UE according to the down channel it is long when channel believe
Breath, PMI components i when selecting more than one adjacent long1, by selection more than one it is adjacent long when PMI components i1, it is described under
Row channel it is long when channel information in it is long when PMI components i1And the selected each length determined according to predetermined selection mode
When PMI components i1Corresponding PMI components i in short-term2Indicated all code words, are defined as cyclic prefix codeword set；
Wherein, the selection more than one it is adjacent long when PMI components i1, it is specially：
Base station by way of RRC signaling, and/or DCI indicate selection and the cyclic prefix of UE cyclic prefix code words,
UE is according to the selection of cyclic prefix received, PMI components i when selecting more than one adjacent long1；Or
UE is according to the selection mode pre-set, PMI components i when selecting more than one adjacent long in the codebook1；Or
Person,
UE is according to the speed of itself and the correlation of channel, PMI points when selecting more than one adjacent long in the codebook
Measure i1；
Wherein, in practical application, which kind of mode UE has determined that using to select more than one adjacent in advance with base station
PMI components i when long1, no matter using which kind of mode, selected by UE and base station more than one it is adjacent long when PMI components i1Phase
Together, for for example, UE and base station can use the selection mode pre-set, PMI when selecting more than one adjacent long
Component i1, now, UE is identical with the selection mode that base station is pre-set；PMI components i when UE can pass through long1The frequency of renewal
Rate determines the speed of itself.
The predetermined selection mode, it is：The selection mode that is pre-configured with is semi-statically configured selection mode simultaneously by base station
UE selection mode is sent to by RRC signaling.
The signal processing method of multiple antennas in downlink system provided by the invention, as shown in figure 3, being carried out to transmission signal
During processing, transmitting data are after layer maps, corresponding to the vector [x of different layers composition(0)(i)…x(υ-1)(i)]T, different layers
Data premultiplication DFT matrix Us transform to frequency domain, the obtained frequency domain data diagonal matrix D (i) that premultiplication converts with subcarrier number i again,
Systemic circulation delay diversity is realized by way of frequency domain phase offset, afterwards by obtained data premultiplication pre-coding matrix successively again
W(iv) and multiply pre-coding matrix W (iRB), carry out the transmission of multiple antennas；Wherein, W (iv) and W (iRB) with different code books and prelist
The mode of code is different.DMRS passes through premultiplication pre-coding matrix W (iRB) after corresponding DMRS port send.
Accordingly, when handling reception signal, UE first by measuring DMRS, obtain reference channel position etc.
Imitate channel information HrW(iRB), obtain the equivalent channels information HW (i of Data Position by interpolationRB), by base station used by circulate
Precoding mode and circulation codeword set determine precoding component W (iv) D (i) U, afterwards with HW (iRB) generated data resource list
Equivalent channels information HW (the i of first (RE, Resource Element) positionRB)W(iv) D (i) U, utilize the equivalent channel of acquisition
Information, to receiving data H [y(0)…y(P)]TIt is demodulated to obtain demodulating data [x(0)…x(v)]T。
Here, it is necessary to which explanation is：The signal processing method of multiple antennas is semi-loop in downlink system provided by the invention
Space multiplexing technique.
The present invention is described in further detail again with reference to embodiment.
Embodiment one
The application scenarios of the present embodiment are：The running time-frequency resource granularity of cyclic prefix is subcarrier, and code book is the 8 of LTER10
Antenna codebook, DMRS pre-coding matrix are unit matrix, the signal processing method of multiple antennas in the downlink system of the present embodiment,
As shown in figure 3, the order of channel is 2, then corresponding R10 code books are as shown in table 1：
Table 1
Wherein,Represent phase factor, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]TRepresent DFT vectors.
Accordingly, in the present embodiment, And W (iv) every 2 sub- carrier transformations are once；Meanwhile in the present embodiment, select i2=0,1,2,3 code
I of the word as code word in circulation codeword set2Component.First, UE measures channel matrix H by CRS or CIS-RS or DMRS；It
Afterwards, different i is traveled through1Value, each i1Value substitutes into code word calculation formula in table 1, with reference to selected i2Calculate each i1It is corresponding to follow
Ring codeword setBased on each i1Corresponding codeword set and predefined cyclic prefix mode and the letter of measurement
Road matrix H, Signal to Interference plus Noise Ratio is calculated, select i corresponding to the maximum codeword set of Signal to Interference plus Noise Ratio1And accordingly make data throughout maximum
CQI reported to base station.The mode reported can continue to use times supported under the transmission mode of the mono- cell Closed-Loop Spatial Multiplexing of R10
A kind of feedback model.Base station side is according to the i reported1It can determine that circulation codeword setAnd cyclically use these code words
Data on sub-carrier carry out precoding.In the present embodiment, the mode of cyclic prefix select be：I is used successively2=0,
1st, the code word in gathering corresponding to 2,3 carries out precoding, i.e.,：The i from set2=0 code word starts, to distributed resource block
Sequentially each two subcarrier uses identical precoding, two RB number from low to high for subcarrier in (RB, Resource Bulk)
Cyclic prefix schematic diagram such as Fig. 4, in Fig. 4,Expression uses i2Code word in gathering corresponding to=0 carries out pre-
Coding,Expression uses i2Code word in gathering corresponding to=1 carries out precoding,Expression uses i2In gathering corresponding to=2
Code word carry out precoding,Expression uses i2Code word in gathering corresponding to=3 carries out precoding, and represents physical down control
Channel (PDCCH, physical downlink control channel) signal processed,Represent DMRS；Identical patterns represent
There are identical W (iv).Use unit matrix W (iRB) pre-coding matrix as DMRS, then 8 antennas just need to take 8 DMRS
Port, it is contemplated that the change of the channel of lower two time slots of high speed is more apparent and is easy to the measurement of identical polarization antenna channel, because
This, can use Fig. 5 shown in antenna to DMRS mapping mode, i.e.,：Identical polarization antenna mapping is to closest DMRS's
RE positions, in Figure 5,A polarised direction is represented,Represent another polarised direction.
Based on the mapping mode in Fig. 5, UE, which can be measured and be obtained two different polarised direction multiple antennas by interpolation, to be believed
Road, so as to synthesize 8 transmitting antenna channel matrix Hs.After UE obtains channel matrix H by DMRS or CRS, cyclic prefix code is used
Code word in word set forms W (iv) D (i) U, according to the agreement of cyclic prefix mode as shown in Figure 4, wherein, identical figure
Case, which represents, identical W (iv), with reference to channel matrix H, form equivalent channels information HW (iv) D (i) U, and each RE positions are demodulated with this
The data put.
Embodiment two
Unlike embodiment one：The application scenarios of the present embodiment are：The wave beam for needing to obtain greater angle extension covers
Lid scope, now, UE determine the down channel it is long when channel information in it is long when PMI components i1It is adjacent long when PMI
Component i1, and by the down channel of determination it is long when channel information in it is long when PMI components i1It is adjacent long when PMI points
Measure i1Base station is sent to, is specially：To the i in code book shown in table 11Component merges, so as to obtain bigger beam scanning angle
Degree extension.In the present embodiment, UE is to every 4 i1Merge, and obtain the sequence number i ' after a merging1And carried out to base station
Report, then i '1Corresponding bit number be 2；The call number i ' then reported1With i in code book1The corresponding relation of the call number such as institute of table 2
Show：
Table 2
| i′1 | I in corresponding code book1 |
| 00 | 0、1、2、3 |
| 01 | 4、5、6、7 |
| 10 | 8、9、10、11 |
| 11 | 12、13、14、15 |
Wherein, for example, when UE is fed back to i '1When=00, PMI components i when base station should choose long1Call number for 0,1,
2nd, 3 and PMI components i in short-term2=0, the code word indicated by 1 forms circulation codeword set.
Except above-mentioned merging i1Method outside, another kind merge i1Method be：UE is measured and is reported i1Rather than i '1, example
Such as, as the i that UE is measured to obtain and reported1It is worth for 2, then chooses i1=1 and i1=3 merge, i.e.,：Choose i in code book1=
1,2,3, i2=0, the code word indicated by 1 forms circulation codeword set.
Embodiment three
Unlike embodiment one, the application scenarios of the present embodiment are：The running time-frequency resource granularity of cyclic prefix is RB,
Code book is LTE R10 8 antenna codebooks, PMI components i when DMRS pre-coding matrix is long1PMI components i in short-term2Indicate
Code word；Cyclic prefix codeword set selects：UE feedbacks it is long when PMI components i1And i1The corresponding components of PMI in short-term i2=
Code word indicated by 8 ..., 15；UE is directly using the equivalent channels information H measured on the channel for sending DMRSrW(i1, i2) insert
It is worth to data RE equivalent channels information HW (i1, i2)。
Under these conditions, two kinds of situations be present, UE is known that the mode of the cyclic prefix of base station and circulation prelist
Code codeword set, the mode and cyclic prefix codeword set of the cyclic prefix of base station can not also be known.When UE does not know
When the mode and cyclic prefix codeword set of cyclic prefix, CQI is calculated in a manner of in LTE R10, i.e.,：Using it is long when
PMI components i1PMI components i in short-term2Instantaneous code word W (the i specified1, i2), the broadband CQI being calculated, and/or subband CQI.
And when UE knows the mode and cyclic prefix codeword set of the cyclic prefix of base station, UE is calculated in the cyclic prefix
CQI under precoding mode.Latter event can obtain the CQI more matched to precoding than the previous case, therefore, it is possible to
Obtain more preferable signal transmission performance.
Example IV
In embodiment two, three, PMI components i when long1Feedback using single cell Closed-Loop Spatial Multiplexing transmission mode under
Any feedback model supported, i.e.,：Although without using parameter i2, but still fed back by the feedback model in R10, and
In the present embodiment, it is assumed that periodic feedback pattern is 1-1, i.e.,：Feed back broadband PMI and broadband CQI.R10 periodic feedback patterns 1-1's
Subpattern 2, two kinds of Report Types is contained in the pattern, one kind is RI, i.e.,：RI is only reported in the sub-frame of uplink of place, it is another
It is PMIi when broadband CQI, broadband are long1And broadband PMIi in short-term2, i.e.,：When reporting broadband CQI, broadband long in the sub-frame of uplink of place
PMIi1And broadband PMIi in short-term2Three kinds of information.In this mode, in ascending control information (UCI, Uplink Control
Informatica the bit number of each parameter and its occupancy) fed back in domain is as shown in table 3：
Table 3
From table 3 it is observed that in order to meet that a subframe Report Body is no more than the limitation of 11 bits, broadband CQI is 4 ratios
Spy, differential CQI bit during order (Rank) ＞ 1 are 3, and remaining bit can only allow i1And i2Down-sampling is all carried out, so, is reduced
Resolution ratio.For only needing to feed back i1Semi-loop multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-
Put) mode, i.e.,：Technical scheme provided by the invention, if directly utilizing existing feedback system, i2It is equivalently employed without
Information, but i can be made1Bit number reduce.Now, if removing otiose i2, i when Rank=1,21Bit number can be with
Return to 4 bits, Rank=3,4i1Bit number can return to 2 bits, so as to add i1Feedback accuracy, and then lifted
The performance of signal transmission.Therefore, the feedback system that the present embodiment provides passes equivalent to a new semi-loop that is directed to is added
The periodic feedback Report Type of defeated pattern, as shown in fig. 6, i.e.：Report PMI points of 4 bit widths band simultaneously in a sub-frame of uplink
Measure i1, 4 bit widths band CQI, when the order indicated by RI is more than 2, further report 3 bit differential CQIs of the second code word.Its
In, broadband PMI components i1Can also be 3 bits, 2 bits or 1 bit, specific bit number can be according to concrete scene, by base station
Configured by RRC signaling, or fixed configurations are some bit number.
Embodiment five
In the present embodiment, it is different from embodiment one, two and three：The selection of cyclic prefix code word is independent of any
PMI information, it is assumed that RI=2, for 2 layers of code book in table 1, choose codeword set { W (i1, i2), wherein, choose i1=0,4,
8,12 } and i2The code word of={ 0,1,2,3,4,5,6,7 } instruction, as cyclic prefix codeword set.The side of cyclic prefix
Formula can be by i1=0 starts, for example, the use of the order of cyclic prefix code word can be W (0,0) ..., W (0,7), W (4,
0) ..., W (4,7) ..., W (12,0) ..., W (12,7).
Embodiment six
In the present embodiment, RI=5, then corresponding code book is as shown in table 4,
Table 4
As can be seen from Table 4, due to RI=5, therefore, only parameter i1Without i2, therefore, only use i1=0,1,2,
3 } 4 code words indicated by use i as cyclic prefix codeword set14 code words indicated by={ 0,1,2,3 } are made
For the code word in cyclic prefix codeword set, precoding is carried out to DMRS and data.
To realize the transmission signal processing method of multiple antennas in above-mentioned downlink system, present invention also offers a kind of descending system
The transmission signal processing equipment of multiple antennas in system, as shown in fig. 7, the device includes：First determining module 71 and precoding module
72；Wherein,
First determining module 71, for when handling transmission signal, base station according to down channel it is long when channel information, really
Determine cyclic prefix codeword set, and the cyclic prefix codeword set of determination is sent to precoding module 72；
Precoding module 72, for receive the first determining module 71 transmission determination cyclic prefix codeword set after,
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS.
Wherein, the device can further include the first acquisition module, for obtain the down channel it is long when believe
Road information, and by the down channel of acquisition it is long when channel information be sent to the first determining module 71；
First determining module 71, be additionally operable to receive the first acquisition module send the down channel it is long when channel
Information.
First determining module 71, it is additionally operable to when needing to obtain the beam coverage of greater angle extension, according to
The down channel it is long when channel information, PMI components i when selecting more than one adjacent long1, by more than one phase of selection
PMI components i when adjacent long1, the down channel it is long when channel information in it is long when PMI components i1And according to pre-setting
Selection mode, PMI components i when identified each long1Corresponding PMI components i in short-term2Indicated all code words, are defined as following
Ring pre-encoding codeword set.
Here, it is necessary to which explanation is：In the downlink system of the present invention in the transmission signal processing equipment of multiple antennas
Modules are the logic module of base station；In the downlink system of the present invention in the transmission signal processing equipment of multiple antennas the
The concrete processing procedure of one determining module, precoding module and the first acquisition module is hereinbefore described in detail, repeats no more.
To realize the method for processing received signal of multiple antennas in above-mentioned downlink system, present invention also offers a kind of descending system
The reception signal processing unit of multiple antennas in system, as shown in figure 8, the device includes：Second determining module 81, CQI computing modules
82 and demodulation module 83；Wherein,
Second determining module 81, believe for when handling reception signal, during according to long with base station identical down channel
Road information, cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules 82
And demodulation module 83；
CQI computing modules 82, for receive the second determining module 81 transmission determination cyclic prefix codeword set after,
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination used by base station, CQI calculating is carried out；
Demodulation module 83, for receive the second determining module 81 transmission determination cyclic prefix codeword set after, according to
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out the demodulation of reception signal used by according to base station.
Wherein, the device can further include：Second acquisition module, for by measuring down channel, obtaining institute
Channel information when stating long with base station identical down channel, and believe when will obtain long with base station identical down channel
Road information is sent to the second determining module 81；
Second determining module 81, it is additionally operable to receive the described and descending letter of base station identical that the second acquisition module is sent
Road it is long when channel information.
Second determining module 81, when being additionally operable to need to obtain the beam coverage of greater angle extension, according to institute
State down channel it is long when channel information, PMI components i when selecting more than one adjacent long1, more than one by selection be adjacent
It is long when PMI components i1, the down channel it is long when channel information in it is long when PMI components i1And according to predetermined selection
Mode determine it is selected each long when PMI components i1Corresponding PMI components i in short-term2Indicated all code words, are defined as circulating
Pre-encoding codeword set；The predetermined selection rule, it is：The selection mode that is pre-configured with is semi-statically configured choosing by base station
Select mode and UE selection mode is sent to by RRC signaling.
Here, it is necessary to which explanation is：In the downlink system of the present invention in the reception signal processing unit of multiple antennas
Modules are UE logic module；The present invention the downlink system in multiple antennas transmission signal processing equipment in second
Determining module and the concrete processing procedure of demodulation module are hereinbefore described in detail, repeat no more.
The reception of multiple antennas in transmission signal processing equipment and downlink system based on multiple antennas in above-mentioned downlink system
Signal processing apparatus, present invention also offers a kind of signal processing system of multiple antennas in downlink system, the system includes：It is descending
In system in the transmission signal processing equipment and downlink system of multiple antennas multiple antennas reception signal processing unit；In downlink system
The transmission signal processing equipment of multiple antennas further comprises：First determining module and precoding module；Multiple antennas in downlink system
Reception signal processing unit further comprise：Second determining module, CQI computing modules and demodulation module；Wherein,
First determining module, for when handling transmission signal, base station according to down channel it is long when channel information, it is determined that
Cyclic prefix codeword set, and the cyclic prefix codeword set of determination is sent to precoding module；
Precoding module, for receive the first determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS；
Second determining module, for when handling reception signal, channel during according to long with base station identical down channel
Information, cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules and solution
Mode transfer block；
CQI computing modules, for receive the second determining module transmission determination cyclic prefix codeword set after, foundation
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out CQI calculating used by base station；
Demodulation module, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base
The mode of cyclic prefix and the cyclic prefix codeword set of determination, carry out the demodulation of reception signal used by standing.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (27)
1. the transmission signal processing method of multiple antennas in a kind of downlink system, it is characterised in that this method includes：
When handling transmission signal, base station according to down channel it is long when channel information, determine cyclic prefix codeword set；
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination, to transmitting data and demodulated reference signal
DMRS carries out precoding；
The down channel it is long when channel information include：Precoding index PMI components and order index RI when long；
It is described according to down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to it is long when PMI components, selected according to the selection mode pre-set in code book corresponding to the order indicated by RI corresponding
PMI components in short-term；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set.
2. according to the method for claim 1, it is characterised in that it is determined that during cyclic prefix codeword set, this method is entered
One step includes：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, select when will be long indicated by PMI components
All code words, be defined as cyclic prefix codeword set.
3. according to the method for claim 1, it is characterised in that when carrying out precoding to transmitting data and DMRS, the party
Method further comprises：
When the running time-frequency resource granularity for carrying out cyclic prefix is subcarrier, using pre- in the cyclic prefix codeword set
The part component of coding codeword carries out precoding to DMRS；
When the running time-frequency resource granularity for carrying out cyclic prefix is PRB, using prelisting in the cyclic prefix codeword set
Code code word carries out precoding to DMRS.
4. according to the method for claim 3, it is characterised in that described using pre- in the cyclic prefix codeword set
The part component of coding codeword carries out precoding to DMRS, is：
When codebook structure is W=W1W2When, using W1Precoding is carried out to DMRS；Wherein, W2Represent the code word with sub-carrier variations
Component.
5. according to the method for claim 1, it is characterised in that this method further comprises：
When need obtain greater angle extension beam coverage when, base station according to the down channel it is long when channel believe
Breath, PMI components when selecting more than one adjacent long, by selection more than one it is adjacent long when PMI components, the descending letter
Road it is long when channel information in it is long when PMI components and according to the selection mode pre-set, PMI when identified each long
The corresponding all code words indicated by PMI components in short-term of component, are defined as cyclic prefix codeword set.
6. according to the method for claim 5, it is characterised in that the selection more than one it is adjacent long when PMI components,
For：
Base station is according to the speed of user equipment (UE) and the correlation of channel, when selecting more than one adjacent long in the codebook
PMI components；Or
Base station is according to the selection mode pre-set, PMI components when selecting more than one adjacent long in the codebook；Or
UE determine the down channel it is long when channel information in it is long when PMI components it is adjacent long when PMI components, and will be true
The fixed down channel it is long when channel information in it is long when PMI components it is adjacent long when PMI components be sent to base station；Base
Stand the down channel that will receive it is long when channel information in it is long when PMI components adjacent long when PMI components, it is alternatively that
More than one it is adjacent long when PMI components.
7. according to the method for claim 6, it is characterised in that the down channel by determination it is long when channel believe
During long in breath PMI components it is adjacent long when PMI components be sent to base station, be：
By the down channel of determination it is long when channel information in it is long when PMI components it is adjacent long when PMI components pass through
The mode of bitmap bitmap modes or the merging mode configuration index number pre-set, is sent to base station.
8. according to the method described in any one of claim 1 to 7, it is characterised in that base station according to down channel it is long when believe
Road information, before determining cyclic prefix codeword set, this method further comprises：
Base station obtain the down channel it is long when channel information.
9. according to the method for claim 8, it is characterised in that the base station obtain the down channel it is long when channel believe
Breath, it is：
Down channel described in UE to base station feedback it is long when channel information；Or base station utilizes channel heterogeneite, measures up letter
Road, obtain the down channel it is long when channel information.
10. according to the method for claim 9, it is characterised in that channel described in UE to base station feedback it is long when channel information
When, this method further comprises：
UE use Closed-Loop Spatial Multiplexing Report mode, to channel described in base station feedback it is long when channel information；Or in physics
In uplink control channel PUCCH or physical uplink link traffic channel PUSCH, PMI components, broadband when reporting long to base station
Channel quality indexes CQI and RI；When the order indicated by RI is more than 2, the difference of the second code word is further reported to base station
CQI。
11. the method for processing received signal of multiple antennas in a kind of downlink system, it is characterised in that this method includes：
When handling reception signal, UE according to base station identical down channel it is long when channel information, determine cyclic prefix
Codeword set；
According to the mode of cyclic prefix and the cyclic prefix codeword set of determination used by base station, CQI calculating is carried out
And the demodulation of reception signal；
The down channel it is long when channel information include：PMI components and RI when long；
The foundation and base station identical down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to base station identical it is long when PMI components, be semi-statically configured selection according to the selection mode pre-set or by base station
The selection mode that mode and the radio resource control RRC signaling sent by base station are known, signified with base station identical RI
Corresponding PMI components in short-term are selected in code book corresponding to the order shown；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set.
12. according to the method for claim 11, it is characterised in that it is determined that during cyclic prefix codeword set, this method
Further comprise：
When the order indicated by RI is more than 4, from code book corresponding to the order indicated by RI, select when will be long indicated by PMI components
All code words, be defined as cyclic prefix codeword set.
13. according to the method for claim 11, it is characterised in that when carrying out CQI calculating, this method is further wrapped
Include：
Running time-frequency resource granularity during precoding is also carried out based on base station simultaneously, utilizes public reference signal CRS, and/or channel shape
Obtained channel information is measured on state information reference signal CSI-RS, and/or DMRS, calculates CQI.
14. according to the method for claim 11, it is characterised in that when carrying out the demodulation of reception signal, this method enters one
Step includes：
UE obtains cyclic prefix codeword set when base station to DMRS use during precoding by measuring DMRS
In pre-encoding codeword or the pre-encoding codeword in the cyclic prefix codeword set component corresponding to it is all or part of etc.
Imitate channel information.
15. according to the method for claim 14, it is characterised in that after obtaining equivalent channels information corresponding to DMRS, the party
Method further comprises：
If the equivalent channels information for measuring to obtain on DMRS includes whole equivalent channels informations, measurement on DMRS is obtained
Equivalent channels information, the whole equivalent channels informations used as demodulation；
If the equivalent channels information for measuring to obtain on DMRS includes part equivalent channels information, measurement on DMRS is obtained
Used by equivalent channels information and base station corresponding to the mode of cyclic prefix and the cyclic prefix codeword set of determination
Equivalent channels information merges, whole equivalent channels informations that the equivalent channels information after merging is used as demodulation.
16. according to the method for claim 11, it is characterised in that this method further comprises：
When need obtain greater angle extension beam coverage when, UE according to the down channel it is long when channel information,
PMI components when selecting more than one adjacent long, by selection more than one it is adjacent long when PMI components, the down channel
It is long when channel information in it is long when PMI components and according to predetermined selection mode determine it is selected each long when PMI components
Corresponding all code words indicated by PMI components in short-term, are defined as cyclic prefix codeword set；
The predetermined selection mode, it is：The selection mode that is pre-configured with is semi-statically configured selection mode by base station and passed through
RRC signaling is sent to UE selection mode.
17. according to the method for claim 16, it is characterised in that the selection more than one it is adjacent long when PMI components,
For：
Base station by RRC signaling, and/or Downlink Control Information DCI indicate selected by UE more than one it is adjacent long when PMI points
Amount；Or
UE is according to the selection mode pre-set, PMI components when selecting more than one adjacent long in the codebook；Or
UE is according to the speed of itself and the correlation of channel, PMI components when selecting more than one adjacent long in the codebook.
18. according to the method described in any one of claim 11 to 17, it is characterised in that in UE according to descending with base station identical
Channel it is long when channel information, before determining cyclic prefix codeword set, this method further comprises：
UE is by measuring down channel, channel information when obtaining described and base station identical down channel long.
19. the transmission signal processing equipment of multiple antennas in a kind of downlink system, it is characterised in that the device includes：First determines
Module and precoding module；Wherein,
First determining module, for when handling transmission signal, base station according to down channel it is long when channel information, it is determined that circulation
Pre-encoding codeword set, and the cyclic prefix codeword set of determination is sent to precoding module；
Precoding module, for receive the first determining module transmission determination cyclic prefix codeword set after, according to circulation
The mode of precoding and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS；
The down channel it is long when channel information include：Precoding index PMI components and order index RI when long；
It is described according to down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to it is long when PMI components, selected according to the selection mode pre-set in code book corresponding to the order indicated by RI corresponding
PMI components in short-term；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set.
20. device according to claim 19, it is characterised in that first determining module, being additionally operable to work as needs to obtain
Greater angle extension beam coverage when, according to the down channel it is long when channel information, select more than one adjacent
It is long when PMI components, by selection more than one it is adjacent long when PMI components, the down channel it is long when channel information in
It is long when PMI components and according to the selection mode pre-set, corresponding PMI in short-term points of PMI components when identified each long
The indicated all code words of amount, are defined as cyclic prefix codeword set.
21. the device according to claim 19 or 20, it is characterised in that the device further comprises the first acquisition module,
For obtain the down channel it is long when channel information, and by the down channel of acquisition it is long when channel information be sent to
First determining module；
First determining module, be additionally operable to receive the first acquisition module send the down channel it is long when channel information.
22. the reception signal processing unit of multiple antennas in a kind of downlink system, it is characterised in that the device includes：Second determines
Module, CQI computing modules and demodulation module；Wherein,
Second determining module, for when handling reception signal, channel information during according to long with base station identical down channel,
Cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules and solution mode transfer
Block；
CQI computing modules, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base station
The mode of used cyclic prefix and the cyclic prefix codeword set of determination, carry out CQI calculating；
Demodulation module, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base station institute
Using cyclic prefix by the way of and determination cyclic prefix codeword set, carry out the demodulation of reception signal；
The down channel it is long when channel information include：PMI components and RI when long；
The foundation and base station identical down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to base station identical it is long when PMI components, be semi-statically configured selection according to the selection mode pre-set or by base station
The selection mode that mode and the radio resource control RRC signaling sent by base station are known, signified with base station identical RI
Corresponding PMI components in short-term are selected in code book corresponding to the order shown；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set.
23. device according to claim 22, it is characterised in that second determining module, be additionally operable to need to obtain more
Wide-angle extension beam coverage when, according to the down channel it is long when channel information, select more than one adjacent
PMI components when long, by selection more than one it is adjacent long when PMI components, the down channel it is long when channel information in
When long PMI components and according to predetermined selection mode determine it is selected each long when the corresponding PMI components in short-term of PMI components
Indicated all code words, are defined as cyclic prefix codeword set；
The predetermined selection rule, it is：The selection mode that is pre-configured with is semi-statically configured selection mode by base station and passed through
RRC signaling is sent to UE selection mode.
24. the device according to claim 22 or 23, it is characterised in that the device further comprises：Second acquisition module,
Channel information during for by measuring down channel, obtaining long with base station identical down channel, and described in obtaining
With base station identical down channel it is long when channel information be sent to the second determining module；
Second determining module, it is additionally operable to receive the described and length of base station identical down channel that the second acquisition module is sent
When channel information.
25. the signal processing system of multiple antennas in a kind of downlink system, it is characterised in that the system includes：It is more in downlink system
The reception signal processing unit of multiple antennas in the transmission signal processing equipment and downlink system of antenna；Multiple antennas in downlink system
Transmission signal processing equipment further comprises：First determining module and precoding module；The reception letter of multiple antennas in downlink system
Number processing unit further comprises：Second determining module, CQI computing modules and demodulation module；Wherein,
First determining module, for when handling transmission signal, base station according to down channel it is long when channel information, it is determined that circulation
Pre-encoding codeword set, and the cyclic prefix codeword set of determination is sent to precoding module；
Precoding module, for receive the first determining module transmission determination cyclic prefix codeword set after, according to circulation
The mode of precoding and the cyclic prefix codeword set of determination, precoding is carried out to transmitting data and DMRS；
Second determining module, for when handling reception signal, channel information during according to long with base station identical down channel,
Cyclic prefix codeword set is determined, and the cyclic prefix codeword set of determination is sent to CQI computing modules and solution mode transfer
Block；
CQI computing modules, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base station
The mode of used cyclic prefix and the cyclic prefix codeword set of determination, carry out CQI calculating；
Demodulation module, after the cyclic prefix codeword set for the determination for receiving the transmission of the second determining module, according to base station institute
Using cyclic prefix by the way of and determination cyclic prefix codeword set, carry out the demodulation of reception signal；
The down channel it is long when channel information include：Precoding index PMI components and order index RI when long；
The base station according to down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to it is long when PMI components, selected according to the selection mode pre-set in code book corresponding to the order indicated by RI corresponding
PMI components in short-term；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set；
The foundation and base station identical down channel it is long when channel information, determine cyclic prefix codeword set, be：
According to base station identical it is long when PMI components, be semi-statically configured selection according to the selection mode pre-set or by base station
The selection mode that mode and the radio resource control RRC signaling sent by base station are known, signified with base station identical RI
Corresponding PMI components in short-term are selected in code book corresponding to the order shown；
PMI components and corresponding all code words indicated by PMI components in short-term of selection, are defined as cyclic prefix code when will be long
Word set.
26. system according to claim 25, it is characterised in that first determining module, being additionally operable to work as needs to obtain
Greater angle extension beam coverage when, according to the down channel it is long when channel information, select more than one adjacent
It is long when PMI components, by selection more than one it is adjacent long when PMI components, the down channel it is long when channel information in
It is long when PMI components and according to the selection mode pre-set, corresponding PMI in short-term points of PMI components when identified each long
The indicated all code words of amount, are defined as cyclic prefix codeword set；And/or
Second determining module, when being additionally operable to need to obtain the beam coverage of greater angle extension, according to described descending
Channel it is long when channel information, PMI components when selecting more than one adjacent long, by selection more than one it is adjacent long when
PMI components, the down channel it is long when channel information in it is long when PMI components and determined according to predetermined selection mode
It is selected each long when the corresponding all code words indicated by PMI components in short-term of PMI components, be defined as cyclic prefix code word set
Close；
The predetermined selection rule, it is：The selection mode that is pre-configured with is semi-statically configured selection mode by base station and passed through
RRC signaling is sent to UE selection mode.
27. the system according to claim 25 or 26, it is characterised in that the reception signal of multiple antennas in the downlink system
Processing unit further comprises：First acquisition module, for obtain the down channel it is long when channel information, and by acquisition
The down channel it is long when channel information be sent to the first determining module；
First determining module, be additionally operable to receive the first acquisition module send the down channel it is long when channel information；
And/or
The reception signal processing unit of multiple antennas further comprises in the downlink system：Second acquisition module, surveyed for passing through
Down channel is measured, channel information when obtaining described and base station identical down channel long, and will obtain described identical with base station
Down channel it is long when channel information be sent to the second determining module；
Second determining module, it is additionally operable to receive the described and length of base station identical down channel that the second acquisition module is sent
When channel information.
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| CN104218982B (en) * | 2013-05-31 | 2017-11-24 | 华为技术有限公司 | The method and apparatus for determining downlink channel condition information |
| US10630352B2 (en) | 2014-11-07 | 2020-04-21 | Lg Electronics Inc. | Signal transmission method and apparatus of apparatus having plurality of antennas in wireless communication system |
| CN106936479B (en) * | 2015-12-28 | 2021-04-09 | 电信科学技术研究院 | Broadcast information transmission method and device |
| EP3399663A4 (en) | 2016-02-03 | 2019-01-16 | Samsung Electronics Co., Ltd. | Method and apparatus for configuring reference signal and for generating channel information in mobile communication system |
| CN107294587A (en) * | 2016-04-07 | 2017-10-24 | 北京信威通信技术股份有限公司 | The transmission method and system of downlink data |
| CN107404342A (en) * | 2016-05-19 | 2017-11-28 | 北京信威通信技术股份有限公司 | A kind of descending multiple antennas method for precoding and system |
| CN107733502A (en) * | 2016-08-11 | 2018-02-23 | 株式会社Ntt都科摩 | Reference signal is sent and feedback method, base station and mobile station |
| CN107769826A (en) * | 2016-08-19 | 2018-03-06 | 索尼公司 | Electronic equipment and method and wireless communication system in wireless communication system |
| CN109076035B (en) | 2016-09-30 | 2020-01-03 | 华为技术有限公司 | Information reporting method and device |
| CN109245875B (en) | 2017-08-12 | 2019-09-13 | 华为技术有限公司 | The method and transmitting device of pre-coding matrix subset limitation |
| CN110971275B (en) * | 2018-09-28 | 2021-11-23 | 大唐移动通信设备有限公司 | Uplink transmission method, uplink transmission scheduling method and device |
| CN110267196B (en) * | 2019-06-18 | 2021-03-23 | 西京学院 | Indoor positioning method based on three-dimensional code mapping |
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