CN107294587A - The transmission method and system of downlink data - Google Patents
The transmission method and system of downlink data Download PDFInfo
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- CN107294587A CN107294587A CN201610213245.1A CN201610213245A CN107294587A CN 107294587 A CN107294587 A CN 107294587A CN 201610213245 A CN201610213245 A CN 201610213245A CN 107294587 A CN107294587 A CN 107294587A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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Abstract
The invention discloses a kind of transmission method of downlink data and system.According to methods described, the system obtains the channel condition information of self terminal；Based on the channel condition information, the multiple candidate beam groups related to antenna port quantity are chosen from beam set；According to the endless form of default each candidate beam group, the pre-coding matrix constituted with each candidate beam group is encoded to downlink data；Data after coding and corresponding pre-coding matrix are sent to the terminal by respective antenna port.The terminal that the present invention solves high-speed mobile can not accurately detect channel quality, and then cause the problem of base station can not provide anti-interference more excellent encoding scheme.
Description
Technical field
The present embodiments relate to the transmission method and system of the communication technology, more particularly to a kind of downlink data.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is by 3GPP (The 3rd Generation
Partnership Project, third generation partner program) UMTS (the Universal Mobile that organize to set up
Telecommunications System, UMTS) technical standard Long Term Evolution, in 2004
December in year formally sets up the project and started in the meeting of 3GPP Toronto.LTE system introduces OFDM
(Orthogonal Frequency Division Multiplexing, OFDM) and MIMO
Key technologies such as (Multi-Input＆Multi-Output, multiple-input and multiple-outputs), significantly increases frequency spectrum
Efficiency and message transmission rate.
In LTE standard, the data transfer between base station and terminal need to be encoded by pre-coding matrix,
Select the mode of pre-coding matrix most in the following ways：Terminal is by receiving the down channel that base station is sent
State information reference signals, are measured to down channel, and according to selected by measurement result is reported to base station
Pre-coding matrix instruction (PMI) information, order instruction (RI) information and channel quality information (CQI),
So as to the suitable downlink transfer parameter of base station selection.
When user is in the scenes such as high-speed mobile, due to higher Doppler frequency shift or other reasonses, report
The information such as PMI it is not accurate enough so that the performance of reduction downlink transfer link.In order to resist at a high speed
The inaccurate situation of PMI information under mobile context, LTE introduces two kinds of open-loop transmission moulds in version 8
Formula：Send out diversity and long time delay cyclic delay diversity (Large delay CDD).Wherein hair diversity is merely capable of
Improve the error performance of unique user, it is impossible to improve the handling capacity of user and system.Long time delay CDD is based on
Cell reference signals (CRS) can highest support 4 layers of transmission, but can only using fixed precoding,
The flexibility of precoding is reduced, the further lifting of performance is limited.Accordingly, it would be desirable to enter to prior art
Row is improved.
The content of the invention
The present invention provides the transmission method and system of a kind of downlink data, to solve user in high-speed mobile scene
Under, when base station can not obtain precise channel status information, the problem of how precoding being carried out to downlink data.
In a first aspect, the embodiments of the invention provide a kind of transmission method of downlink data, including：It is obtained from
The channel condition information of terminal；Based on the channel condition information, chosen and antenna port from beam set
The related multiple candidate beam groups of quantity；According to the endless form of default each candidate beam group, waited with each
The pre-coding matrix for selecting wave beam group to be constituted is encoded to downlink data；By the data after coding and utilize institute
State pre-coding matrix coding downstream modulation DRS (Dedicated Reference Signal) be sent to by respective antenna port it is described
Terminal.
Second aspect, the embodiment of the present invention additionally provides a kind of Transmission system of downlink data, including：Obtain
Module, the channel condition information for obtaining self terminal；Module is chosen, for based on channel status letter
Breath, chooses the multiple candidate beam groups related to antenna port quantity from beam set；Coding module, is used
In the endless form according to default each candidate beam group, the precoding square constituted with each candidate beam group
Battle array is encoded to downlink data；Sending module, for by the data after coding and utilize the precoding square
The downstream modulation DRS (Dedicated Reference Signal) of battle array coding is sent to the terminal by respective antenna port.
The present invention channel condition information that is provided according to terminal chooses multiple candidate beam groups, and according to institute
The pre-coding matrix that is constituted of each candidate beam group chosen is encoded to the data to be sent, so
Channel quality can not accurately be detected by solving the terminal of high-speed mobile, and then it is anti-interference to cause base station not provide
The problem of property more excellent encoding scheme.
Brief description of the drawings
Fig. 1 is the flow chart of the transmission method of the downlink data in the embodiment of the present invention one；
Fig. 2 is the structural representation of the Transmission system of the downlink data in the embodiment of the present invention three.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The specific embodiment of place description is used only for explaining the present invention, rather than limitation of the invention.Also need in addition
It is noted that illustrate only part related to the present invention for the ease of description, in accompanying drawing and not all knot
Structure.
Embodiment one
Fig. 1 is the flow chart of the transmission method for the downlink data that the embodiment of the present invention one is provided, and the present embodiment can
The pre-coding matrix matched suitable for base station for the data decimation to be sent and network environment, and then by number
According to the situation for carrying out coding transmission, this method can be performed by the Transmission system in base station, wherein, it is described
Base station can be installed on optional position, be particularly suitable for use near highway/high ferro circuit, for moving at a high speed
Dynamic terminal service.The transmission method specifically includes following steps：
Step S110, the channel condition information for obtaining self terminal.
Specifically, Transmission system enters line period/aperiodic letter with the terminal in place base station institute coverage
Road quality testing, and obtain the channel condition information of terminal.Wherein, the channel condition information includes following
It is at least one：PMI (pre-coding matrix instruction), RI (the transmission number of plies) and CQI (channel quality) etc..
The Transmission system performs step S120 according to the channel condition information received.
A kind of alternative is before step S110 is performed, to first carry out step S100.
Step S100, the downlink channel condition information reference signal (CSI-RS) to terminal transmission non-precoded,
So that the terminal is based on the detection to down channel, the channel condition information is fed back.
Specifically, the cell that the Transmission system is covered to base station sends the CSI-RS sequences of non-precoded,
Each terminal carries out channel quality measurement based on the CSI-RS sequence pairs down channel received, and according to channel
Quality selects the information such as suitable pre-coding matrix, the transmission number of plies, then by resulting CQI and PMI
The Transmission system is given with the information feedback such as RI, then the Transmission system performs step S110.
Step S120, based on the channel condition information, from beam set choose with antenna port quantity
Related multiple candidate beam groups.
Here, the Transmission system is according to based on the transmission number of plies and precoding square in the channel condition information
Rule constructed by battle array configured information, a number of precoding is selected in optional pre-coding matrix set
Matrix constitutes candidate beam group.
Here, the pre-coding matrix instruction that the Transmission system is not provided according to terminal is pre- to choose one
Encoder matrix, but refer to the channel condition information and constitute candidate to choose multiple optimal pre-coding matrixes
Wave beam group.The strategy that the Transmission system chooses candidate beam group can be depending on the application environment according to real base station.
For example, the base station is located at by high-speed line, the Selection Strategy set by Transmission system therein should be for height
Depending on the mobile terminal of speed.
Step S130, the endless form according to default each candidate beam group, with each candidate beam group institute
Comprising pre-coding matrix downlink data is encoded.
Here, base station, which can dispatch multiple Physical Resource Block (PRB), is used for terminal progress downlink data biography
Defeated, the Transmission system can recycle the pre-coding matrix in candidate beam group to the PRB of base station scheduling
Precoding is carried out to downlink data, the endless form can be according to precoding numbering in candidate beam group by small
To big or descending circulated.
In the present embodiment, the encoding operation includes：
Step S131, based on the transmission number of plies in the channel condition information, the data after modulation are carried out
Layer mapping, obtains data vector.
Step S132, based on the transmission number of plies, the data vector is entered into circulation delay precoding.
Here, the Transmission system first layer is mapped after data vector and a υ × υ DFT matrixes
It is multiplied, data-signal is averaged between the different layers.The expression formula for the DFT matrixes that the number of plies is υ is：
Then, data vector is multiplied by the Transmission system with a υ × υ diagonal circulation delay matrix,
Wherein, the expression formula of the diagonal circulation delay matrix is：
In formula, i=0,1 ...,Represent the data symbol number transmitted on each antenna port.
Step S133, the endless form according to default each candidate beam group, recycle each candidate beam
The constituted pre-coding matrix of group is encoded to each data vector by circulation delay precoding.
In this, it is assumed that the Transmission system scheduled K PRB (Physical Resource Block), all PRB according to
LSB order is arranged as p, p+1 ..., p+K-1.The Transmission system is different PRB circulations point
Precoding is used as with each candidate beam group.Specifically the method for salary distribution is：The precoding that q-th of PRB pair is answered should
Should be Wk, wherein k is precoding index, and specific calculation is
Wherein, 4 be candidate beam group quantity an example.
Again by data vector and the pre-coding matrix W of current selectedkIt is multiplied, and performs step S140.
Step S140, the downstream modulation encoded by the data after coding and using the pre-coding matrix are special
Reference signal is sent to the terminal by respective antenna port.
Here, the data after coding are first mapped in corresponding resource by the Transmission system, then pass through
OFDM is modulated, and the terminal is sent to finally by corresponding antenna port.
At the same time, the Transmission system selects downlink reference signal always according to the quantity of pre-coding matrix
DMRS port, generates the downstream modulation DRS (Dedicated Reference Signal) (DMRS signals) of corresponding ports；And to each
The downstream modulation DRS (Dedicated Reference Signal) of individual DMRS port is multiplied by corresponding pre-coding matrix W respectivelyk, pass through
Corresponding DMRS port is sent to terminal, so that terminal-pair received signal is demodulated.
The technical scheme of the present embodiment, the channel condition information provided according to terminal chooses multiple candidate's ripples
Beam group, and the pre-coding matrix constituted according to selected each candidate beam group is come to the data to be sent
Encoded, the accurate channel state of user under high-speed mobile scene can not accurately be obtained by so solving base station
Information, it is impossible to the problem of selecting optimal encoding scheme.The present embodiment provides more high noise immunity for terminal
Data transfer.
In addition, the selection candidate beam group number consistent with antenna port number, is conducive to the transmission speed of matched data
The other factors such as rate.
Embodiment two
Candidate's ripple can be chosen as follows in order to have more the Transmission system in universality, each base station
Beam group.That is step S120 includes：Step S121, S122 and S123.(being unillustrated)
Step S121, the transmission number of plies judged in the channel condition information, if the transmission number of plies is more than
Default number of plies threshold value, then perform step S122, conversely, then performing step S123.
Here, the Transmission system is pre-defined：vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
When getting channel condition information, transmission number of plies RI therein is judged, the present embodiment is with most 8 layers transmission
Exemplified by the number of plies, the default number of plies threshold value is 4.If the acquired transmission number of plies is more than default number of plies threshold value,
Step S122 is then performed, conversely, then performing step S123.
Step S122, corresponding described the transmitting the number of plies and multiple times related to antenna port quantity of selection
Select wave beam group.
Specifically, the Transmission system is based on the transmission number of plies, from beam set：
Or,Middle selection and antenna port quantity phase
The candidate beam group of pass；
Wherein, Wm (t)Corresponding pre-coding matrix set when representing the transmission number of plies for t, m=0,1,2,3,
vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
The present embodiment is that 4, candidate beam group number is 4 citings by 8, number of plies threshold value of the maximum transmitted number of plies.
As acquired transmission number of plies RI=5, according toChoosing
4 candidate beam collection are taken to be combined into
As RI=6, according toChoose 4
Candidate beam collection is combined into
As RI=7, according toChoosing
4 candidate beam collection are taken to be combined into
As RI=8, the pre-coding matrix directly constituted using following wave beam group
Step S123, the pre-coding matrix instruction in the channel condition information, choose and antenna end
The related multiple candidate beam groups of mouth quantity.
Here, the Transmission system is it is determined that the transmission number of plies is less than or equal to after the number of plies threshold, according to channel shape
The transmission number of plies in state information come select it is consistent with antenna port quantity, with the channel condition information
The phase adjustment factor identical candidate beam group of pre-coding matrix corresponding to PMI.
Specifically, described second chooses submodule according to the phase property of the pre-coding matrix instruction, from right
The precoding set of the number of plies should be transmitted：
OrIt is middle to choose related to antenna port quantity multiple
Candidate beam group；
Wherein, Wm,n (t)、Wm,m′,n (t)、Wm,m′,m″ (t)OrRepresent corresponding when the transmission number of plies is t
Pre-coding matrix set, m, m ', m "=0,1 ..., 15, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32],
N=0,1,2,3.
The present embodiment is by taking double codebook structures as an example, PMI1Specify several possible beam directions, PMI2With
In carrying out beam selection in multiple candidate beam groups that PMI is specified, and determine two antenna polarization directions
On the co-phasing factors (the phase adjustment factor).
As RI=1, two PMI parameters respectively i that terminal is reported1And i2.Now, the transmission system
System basisChoosing 4 candidate beam groups is
As RI=2, two PMI parameters respectively i that terminal is reported1And i2.Now, the transmission system
System selection candidate beam group is in two kinds of situation：
Work as i2<When 8, according toThe candidate beam group of selection is
Work as i2>When 7, according toThe candidate beam group of selection is
As RI=3, two PMI parameters respectively i that terminal is reported1And i2.Now, when
i2During ∈ { 0, Isosorbide-5-Nitrae, 5,8,9,12,13 }, according toChoosing 4 candidate beam groups is
Work as i2During ∈ { 2,3,6,7,10,11,14,15 }, according toChoose 4 candidate beams
Group is
As RI=4, two PMI parameters respectively i that terminal is reported1And i2.The now Transmission system
According toChoose 4 candidate beams can be
The transmission number of plies and the phase adjustment factor of pre-coding matrix that the present embodiment is reported according to terminal, in institute
Several pre-coding matrixes composition candidate beam group is chosen around the corresponding wave beam of pre-coding matrix reported, such as
This, effectively increases the accuracy of selected wave beam group, and is further improved by way of recycling
The anti-interference of data transfer.
Embodiment three
Fig. 2 is the structural representation of the Transmission system for the downlink data that the embodiment of the present invention three is provided, this implementation
The pre-coding matrix that the data decimation that example is applicable to base station to be sent matches with network environment, and then
Data are carried out to the situation of coding transmission, this method can be performed by the Transmission system in base station, wherein,
The base station can be installed on optional position, be particularly suitable for use near highway/high ferro circuit, for height
The mobile terminal service of speed.The Transmission system 1 specifically includes acquisition module 11, chooses module 12, compiles
Code module 13, sending module 14.
The acquisition module 11 is used for the channel condition information for obtaining self terminal.
Specifically, acquisition module 11 and the terminal in place base station institute coverage enter line period/aperiodic
Channel quality measurement, and obtain the channel condition information that terminal is reported.Wherein, the channel condition information bag
Include following at least one：PMI (pre-coding matrix instruction), RI (the transmission number of plies) and CQI (channels
Quality) etc..The acquisition module 11 performs according to the channel condition information received and chooses module 12.
A kind of alternative is before the execution of acquisition module 11, first to be sent from sending module 14 to terminal
The downlink channel condition information reference signal (CSI-RS) of non-precoded, so as to the terminal-pair down channel
Measure and feed back.
Specifically, the cell that the sending module 14 is covered to place base station sends non-precoded
CSI-RS sequences, each terminal is measured based on the CSI-RS sequence pair down channels received, and according to
Measure obtained channel condition information and select the information such as suitable pre-coding matrix, the transmission number of plies, then by gained
The information feedbacks such as CQI, PMI and the RI arrived give the acquisition module 11, then the acquisition mould
The channel condition information received is supplied to selection module 12 by block 11.
The selection module 12 is used to be based on the channel condition information, is chosen and antenna from beam set
The related multiple candidate beam groups of port number.
Here, the selection module 12 is according to based on the transmission number of plies in the channel condition information and prelisting
Criterion constructed by code matrix configured information, selects a number of pre- in optional pre-coding matrix set
Encoder matrix constitutes candidate beam group.
Here, the pre-coding matrix instruction that the selection module 12 is not provided according to terminal is pre- to choose
Encoder matrix, but refer to the channel condition information and constitute candidate to choose multiple optimal pre-coding matrixes
Wave beam group.It is described choose module 12 choose the strategy of candidate beam group can be according to the application environment of real base station
Depending on.For example, the base station is located at by high-speed line, the selection plan therein chosen set by module 12
Depending on slightly should be for the terminal of high-speed mobile.
The coding module 13 is used for the endless form according to default each candidate beam group, uses each candidate
The pre-coding matrix that wave beam group is included is encoded to downlink data.
Here, base station, which can dispatch multiple Physical Resource Block (PRB), is used for terminal progress downlink data biography
Defeated, the Transmission system can recycle the pre-coding matrix in candidate beam group to the PRB of base station scheduling
Precoding is carried out to downlink data, the endless form can be according to precoding numbering in candidate beam group by small
To big or descending circulated.
In the present embodiment, the coding module 13 includes：Layer mapping submodule, circulation delay prelist numeral
Module, encoding submodule.
The layer mapping submodule is used for based on the transmission number of plies in the channel condition information, after modulation
Data carry out layer mapping, obtain data vector.
The circulation delay precoding submodule is used to be based on the transmission number of plies, and the data vector is carried out
Circulation delay precoding.
Here, the data vector circulated after delay precoding submodule first maps layer and one
υ × υ DFT matrix multiples, are averaged between the different layers to data-signal.The number of plies is υ DFT
The expression formula of matrix is：
Then, the circulation delay precoding submodule prolongs the diagonal circulation of data vector and a υ × υ
When matrix multiple, wherein, it is described it is diagonal circulation delay matrix expression formula be：
In formula, i=0,1 ...,Represent the data symbol number transmitted on each antenna port.
The encoding submodule is used for the endless form according to default each candidate beam group, recycles each wait
The pre-coding matrix that wave beam group is constituted is selected to encode each data vector through circulation delay precoding.
In this, it is assumed that the encoding submodule scheduled K PRB (Physical Resource Block), all PRB
Order according to LSB is arranged as p, p+1 ..., p+K-1.The encoding submodule is different PRB
Each candidate beam group of cycle assignment is used as precoding.Specifically the method for salary distribution is：It is pre- that q-th of PRB pair is answered
Coding should be Wk, wherein k is precoding index, and specific calculation is
Wherein, 4 be candidate beam group quantity an example.
Again by data vector and the pre-coding matrix W of current selectedkIt is multiplied, and performs sending module 14.
The sending module 14 is used for the data after coding and utilizes the descending of pre-coding matrix coding
Demodulation DRS (Dedicated Reference Signal) is sent to the terminal by respective antenna port.
Here, each data after coding are carried out resource impact by the sending module 14, adjusted by OFDM
Launched after system by different antenna ports.
At the same time, the sending module 14 selects downlink reference signal always according to the quantity of pre-coding matrix
DMRS port, generates the downstream modulation DRS (Dedicated Reference Signal) (DMRS signals) of corresponding ports；And to each
The downstream modulation DRS (Dedicated Reference Signal) of individual DMRS port is multiplied by corresponding pre-coding matrix W respectivelyk, pass through
Corresponding DMRS port is sent to terminal, so that the data that terminal-pair is received are demodulated and decoded.
The technical scheme of the present embodiment, the channel condition information provided according to terminal chooses multiple candidate's ripples
Beam group, and the pre-coding matrix included according to selected each candidate beam group is come to the data to be sent
Encoded, high speed mobile terminal accurate channel information can not be obtained by so solving base station, and then cause base
Stand the problem of more excellent encoding scheme of anti-interference can not be provided.The present embodiment provides more Gao Kanggan for terminal
The data transfer of immunity.
In addition, the selection candidate beam group number consistent with antenna port number, is conducive to the transmission speed of matched data
The other factors such as rate.
Example IV
Candidate's ripple can be chosen as follows in order to have more the Transmission system in universality, each base station
Beam group.I.e. described selection module 12 includes：Judging submodule, first choose submodule and second and choose son
Module.(being unillustrated)
The judging submodule is used to judge the transmission number of plies in the channel condition information, if the transport layer
Number is more than default number of plies threshold value, then performs first and choose submodule, conversely, then performing second chooses submodule.
Here, the judging submodule is pre-defined：vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
When getting channel condition information, transmission number of plies RI therein is judged, the present embodiment is with most 8 layers transmission
Exemplified by the number of plies, the default number of plies threshold value is 4.If the acquired transmission number of plies is more than default number of plies threshold value,
Then perform first and choose submodule, conversely, then performing second chooses submodule.
It is described first selection submodule be used for choose correspondence it is described transmission the number of plies and with antenna port quantity phase
The multiple candidate beam groups closed.
Specifically, described first submodule is chosen based on the transmission number of plies, from beam set：
Or,Middle selection and antenna port quantity phase
The candidate beam group of pass；
Wherein, Wm (t)Corresponding pre-coding matrix set when representing the transmission number of plies for t, m=0,1,2,3,
vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
The present embodiment is that 4, candidate beam group number is 4 citings by 8, number of plies threshold value of the maximum transmitted number of plies.
As acquired transmission number of plies RI=5, according toChoosing
4 candidate beam collection are taken to be combined into
As RI=6, according toChoose 4
Candidate beam collection is combined into
As RI=7, according toChoosing
4 candidate beam collection are taken to be combined into
As RI=8, the pre-coding matrix directly constituted using following wave beam group
Described second, which chooses submodule, is used for the pre-coding matrix instruction in the channel condition information, choosing
Take the multiple candidate beam groups related to antenna port quantity.
Here, it is described second choose submodule it is determined that transmission the number of plies be less than or equal to the number of plies threshold after, according to
The transmission number of plies in channel condition information come select it is consistent with antenna port quantity, believe with the channel status
The phase adjustment factor identical candidate beam group of pre-coding matrix in breath corresponding to PMI.
Specifically, described second chooses submodule according to the phase property of the pre-coding matrix instruction, from right
The precoding set of the number of plies should be transmitted：
OrIt is middle to choose related to antenna port quantity multiple
Candidate beam group；
Wherein, Wm,n (t)、Wm,m′,n (t)、Wm,m′,m″ (t)OrRepresent corresponding when the transmission number of plies is t
Pre-coding matrix set, m, m ', m "=0,1 ..., 15, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32],
N=0,1,2,3.
The present embodiment is by taking double codebook structures as an example, PMI1Specify several possible beam directions, PMI2With
In carrying out beam selection in multiple candidate beam groups that PMI is specified, and determine two antenna polarization directions
On the co-phasing factors (the phase adjustment factor).
As RI=1, two PMI parameters respectively i that terminal is reported1And i2.Now, second choosing
Take submodule according toChoosing 4 candidate beam groups is
As RI=2, two PMI parameters respectively i that terminal is reported1And i2.Now, second choosing
Submodule is taken to select candidate beam group in two kinds of situation：
Work as i2<When 8, according toThe candidate beam group of selection is
Work as i2>When 7, according toThe candidate beam group of selection is
As RI=3, two PMI parameters respectively i that terminal is reported1And i2.Now, when
i2During ∈ { 0, Isosorbide-5-Nitrae, 5,8,9,12,13 }, according toChoosing 4 candidate beam groups is
Work as i2During ∈ { 2,3,6,7,10,11,14,15 }, according toChoose 4 candidate beams
Group is
As RI=4, two PMI parameters respectively i that terminal is reported1And i2.Now described second choose
Submodule according toChoose 4 candidate beams can be
The transmission number of plies and the phase adjustment factor of pre-coding matrix that the present embodiment is reported according to terminal, in institute
Candidate beam group is chosen around the corresponding wave beam group of pre-coding matrix reported, in this way, effectively increasing selected
The accuracy for the wave beam group selected, and further increase by way of recycling the anti-interference of data transfer
Property.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art
It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art
Row it is various it is obvious change, readjust and substitute without departing from protection scope of the present invention.Therefore, though
So the present invention is described in further detail by above example, but the present invention be not limited only to
Upper embodiment, without departing from the inventive concept, can also include other more equivalent embodiments,
And the scope of the present invention is determined by scope of the appended claims.
Claims (12)
1. a kind of transmission method of downlink data, it is characterised in that including：
Obtain the channel condition information of self terminal；
Based on the channel condition information, the multiple times related to antenna port quantity are chosen from beam set
Select wave beam group；
According to the endless form of default each candidate beam group, the precoding constituted with each candidate beam group
Matrix is encoded to downlink data；
The downstream modulation DRS (Dedicated Reference Signal) encoded by the data after coding and using the pre-coding matrix is led to
Cross respective antenna port and be sent to the terminal.
2. the transmission method of downlink data according to claim 1, it is characterised in that be obtained from
Before the down channel detection information of terminal, in addition to：
To terminal send non-precoded downlink channel condition information reference signal, so as to the terminal be based on pair
The detection of down channel, feeds back the channel condition information.
3. the transmission method of downlink data according to claim 1, it is characterised in that described to be based on
Channel condition information, the selection multiple candidate beam groups related to antenna port quantity include from beam set：
Judge the transmission number of plies in the channel condition information, if the transmission number of plies is more than default number of plies threshold value,
Then choose corresponding described the transmitting the number of plies and multiple candidate beam groups related to antenna port quantity；
If the transmission number of plies is less than or equal to default number of plies threshold value, pre- in the channel condition information
Encoder matrix is indicated, chooses the multiple candidate beam groups related to antenna port quantity.
4. the transmission method of downlink data according to claim 3, it is characterised in that the selection
Correspondence it is described transmission the number of plies and the multiple candidate beam groups related to antenna port quantity include：
Based on the transmission number of plies, from beam set：
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>40</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>48</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>48</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>24</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>24</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
Or,Middle selection and antenna port quantity phase
The candidate beam group of pass；
Wherein, Wm (t)Represent pre-coding matrix set corresponding when the transmission number of plies is t, m=0,1,2,3.,
vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
5. the transmission method of downlink data according to claim 3, it is characterised in that the basis
Pre-coding matrix instruction in channel condition information, chooses the multiple candidate beams related to antenna port quantity
Group includes：
According to the phase property of the pre-coding matrix instruction, from the precoding set of the correspondence transmission number of plies：
<mrow>
<msubsup>
<mi>W</mi>
<mrow>
<mi>m</mi>
<mo>,</mo>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
<mo>,</mo>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</mrow>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>24</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mi>m</mi>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mi>m</mi>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
</msub>
</mrow>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
<mrow>
<msubsup>
<mover>
<mi>W</mi>
<mo>~</mo>
</mover>
<mrow>
<mi>m</mi>
<mo>,</mo>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
<mo>,</mo>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</mrow>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>24</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mi>m</mi>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mi>m</mi>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mo>&prime;</mo>
</msup>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<msup>
<mi>m</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
OrIt is middle to choose related to antenna port quantity multiple
Candidate beam group；
Wherein, Wm,n (t)、Wm,m′,n (t)、Wm,m′,m″ (t)OrRepresent corresponding when the transmission number of plies is t
Pre-coding matrix set, m, m ', m "=0,1 ..., 15, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32],
N=0,1,2,3.
6. the transmission method of downlink data according to claim 1, it is characterised in that it is described according to
The endless form of default each candidate beam group, the pre-coding matrix constituted with each candidate beam group is under
Row data, which carry out coding, to be included：
Based on the transmission number of plies in the channel condition information, layer mapping is carried out to the data after modulation, obtained
Data vector；
Based on the transmission number of plies, circulation delay precoding is carried out to the data vector；
According to the endless form of default each candidate beam group, it is pre- that each candidate beam group of recycling is constituted
Encoder matrix is encoded to each data vector by circulation delay precoding.
7. a kind of Transmission system of downlink data, it is characterised in that including：
Acquisition module, the channel condition information for obtaining self terminal；
Module is chosen, for based on the channel condition information, being chosen and antenna port number from beam set
Measure related multiple candidate beam groups；
Coding module, for the endless form according to default each candidate beam group, with each candidate beam group
The pre-coding matrix constituted is encoded to downlink data；
Sending module, the downstream modulation for being encoded by the data after coding and using the pre-coding matrix is special
The terminal is sent to by respective antenna port with reference signal.
8. the Transmission system of downlink data according to claim 7, it is characterised in that the transmission
Module is additionally operable to send the downlink channel condition information reference signal of non-precoded to terminal, so as to the terminal
Based on the detection to down channel, and by the information feedback to the acquisition module.
9. the Transmission system of downlink data according to claim 7, it is characterised in that the selection
Module includes：
Judging submodule, for judging the transmission number of plies in the channel condition information, if the transmission number of plies
More than default number of plies threshold value, then perform first and choose submodule, conversely, then performing second chooses submodule；
It is described first selection submodule be used for choose correspondence it is described transmission the number of plies and with antenna port quantity phase
The multiple candidate beam groups closed；
Described second, which chooses submodule, is used for the pre-coding matrix instruction in the channel condition information, choosing
Take the multiple candidate beam groups related to antenna port quantity.
10. the Transmission system of downlink data according to claim 9, it is characterised in that described first
Choosing submodule is used to be based on the transmission number of plies, from beam set：
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>40</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>48</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mo>-</mo>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
<mrow>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>48</mn>
</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
</mrow>
</msub>
</mtd>
<mtd>
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<mrow>
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</msub>
</mtd>
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</mrow>
</msub>
</mtd>
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</mrow>
</msub>
</mtd>
<mtd>
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<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mtd>
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<mn>24</mn>
</mrow>
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</mtd>
</mtr>
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</mtd>
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</mtd>
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<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>8</mn>
</mrow>
</msub>
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</mtd>
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<mi>m</mi>
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</mrow>
</msub>
</mtd>
<mtd>
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<msub>
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<mrow>
<mn>2</mn>
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<mo>+</mo>
<mn>16</mn>
</mrow>
</msub>
</mrow>
</mtd>
<mtd>
<msub>
<mi>v</mi>
<mrow>
<mn>2</mn>
<mi>m</mi>
<mo>+</mo>
<mn>24</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
Or,Middle selection and antenna port quantity phase
The candidate beam group of pass；
Wherein, Wm (t)Corresponding pre-coding matrix set when representing the transmission number of plies for t, m=0,1,2,3,
vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]。
11. the Transmission system of downlink data according to claim 9, it is characterised in that described second
Choosing submodule is used for the phase property according to the pre-coding matrix instruction, from prelisting for the correspondence transmission number of plies
Code collection is closed：
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</msqrt>
</mfrac>
<mfenced open = "[" close = "]">
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</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>,</mo>
</mrow>
OrIt is middle to choose related to antenna port quantity multiple
Candidate beam group；
Wherein, Wm,n (t)、Wm,m′,n (t)、Wm,m′,m″ (t)OrRepresent corresponding when the transmission number of plies is t
Pre-coding matrix set, m, m ', m "=0,1 ..., 15, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32],
N=0,1,2,3.
12. the Transmission system of downlink data according to claim 7, it is characterised in that the coding
Module includes：
Layer mapping submodule, for based on the transmission number of plies in the channel condition information, to the number after modulation
According to layer mapping is carried out, data vector is obtained；
Circulation delay precoding submodule, for based on the transmission number of plies, being followed to the data vector
Ring delay precoding；
Encoding submodule, for the endless form according to default each candidate beam group, recycles each candidate
The pre-coding matrix that wave beam group is constituted is encoded to each data vector by circulation delay precoding.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855414A (en) * | 2019-11-18 | 2020-02-28 | 展讯通信（上海）有限公司 | Downlink decoding method, device, user equipment and storage medium |
| CN111934733A (en) * | 2020-08-31 | 2020-11-13 | Oppo广东移动通信有限公司 | Method, device, terminal and storage medium for determining test precoding matrix |
| CN112088505A (en) * | 2018-05-22 | 2020-12-15 | 株式会社Ntt都科摩 | Precoding method, decoding method, transmitting device and receiving device |
| CN113940020A (en) * | 2019-03-29 | 2022-01-14 | 瑞典爱立信有限公司 | CSI-based precoding in search space subsets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012129798A1 (en) * | 2011-03-30 | 2012-10-04 | Huawei Technologies Co., Ltd. | Method and apparatus for open loop transmission in a multiple antenna wireless communication system |
| CN102957467A (en) * | 2011-08-24 | 2013-03-06 | 中兴通讯股份有限公司 | Method and system for processing signals of multiple antennas in downlink system |
| KR20150064834A (en) * | 2013-12-04 | 2015-06-12 | 한밭대학교 산학협력단 | System and method of wireless relaying communications using cyclic precoding |
-
2016
- 2016-04-07 CN CN201610213245.1A patent/CN107294587A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012129798A1 (en) * | 2011-03-30 | 2012-10-04 | Huawei Technologies Co., Ltd. | Method and apparatus for open loop transmission in a multiple antenna wireless communication system |
| CN102957467A (en) * | 2011-08-24 | 2013-03-06 | 中兴通讯股份有限公司 | Method and system for processing signals of multiple antennas in downlink system |
| KR20150064834A (en) * | 2013-12-04 | 2015-06-12 | 한밭대학교 산학협력단 | System and method of wireless relaying communications using cyclic precoding |
Non-Patent Citations (3)
| Title |
|---|
| SAMSUNG: "4Tx and 8Tx feedback framework for Rel.10", 《3GPP TSG RAN WG1 MEETING #62 R1-104602》 * |
| SAMSUNG: "Discussions on open and semi-open loop transmission in eFD-MIMO", 《3GPP TSG RAN WG1 MEETING #84BIS R1-162697》 * |
| SAMSUNG: "MIMO for 5G new radio interface: sub-6GHz", 《3GPP TSG RAN WG1 #84BIS R1-162182》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112088505A (en) * | 2018-05-22 | 2020-12-15 | 株式会社Ntt都科摩 | Precoding method, decoding method, transmitting device and receiving device |
| CN113940020A (en) * | 2019-03-29 | 2022-01-14 | 瑞典爱立信有限公司 | CSI-based precoding in search space subsets |
| CN110855414A (en) * | 2019-11-18 | 2020-02-28 | 展讯通信（上海）有限公司 | Downlink decoding method, device, user equipment and storage medium |
| CN110855414B (en) * | 2019-11-18 | 2021-11-26 | 展讯通信（上海）有限公司 | Downlink decoding method, device, user equipment and storage medium |
| CN111934733A (en) * | 2020-08-31 | 2020-11-13 | Oppo广东移动通信有限公司 | Method, device, terminal and storage medium for determining test precoding matrix |
| CN111934733B (en) * | 2020-08-31 | 2021-12-24 | Oppo广东移动通信有限公司 | Method, device, terminal and storage medium for determining test precoding matrix |
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