CN105207708B - A kind of generation method and device of wave beam forming weight vector - Google Patents
A kind of generation method and device of wave beam forming weight vector Download PDFInfo
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- CN105207708B CN105207708B CN201510560803.7A CN201510560803A CN105207708B CN 105207708 B CN105207708 B CN 105207708B CN 201510560803 A CN201510560803 A CN 201510560803A CN 105207708 B CN105207708 B CN 105207708B
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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
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—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
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- 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
- H04B7/0658—Feedback reduction
- H04B7/0663—Feedback reduction using vector or matrix manipulations
Abstract
The embodiment of the invention provides the generation methods and device of a kind of wave beam forming weight vector, wherein method, include: the time t_bf that base station executes wave beam forming as needed, search and t_bf apart from shortest SRS receiving time t_srs and with t_bf apart from shortest PM I receiving time t_pm i；Then the time difference T_SRS and t_bf of t_bf and t_srs and the time difference T_PM I of t_pm i are calculated；According to the relationship of T_SRS, T_PM I and time threshold, T_SRS or T_PM I is selected；When choosing T_SRS, down beam shaping weight vector is generated using SRS；When choosing T_PM I, down beam shaping weight vector is generated using PM I.The present invention can be improved the accuracy of wave beam forming weight vector, to obtain preferable wave beam forming effect, to effectively promote the performance of user's down beam shaping.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of generation method of down beam shaping weight vector
And device.
Background technique
Beamforming technique is introduced in LTE (Long Term Evolution, long term evolution project) standard, wave beam is assigned
Shape technology is a kind of Signal Pretreatment technology based on aerial array, and wave beam forming is by adjusting array element each in aerial array
Weighting coefficient generates the wave beam with directive property, so as to obtain apparent array gain.Therefore, beamforming technique is expanding
Large coverage, improvement edge throughput and AF panel etc. have very big advantage.
When using beamforming technique, most important link is " determining wave beam forming weight vector ", at this stage there are two types of
Mode: first way is uplink SRS (Sounding Reference Symbol, the detection reference that base station is sent according to UE
Signal), based on the heterogeneite of TDD system uplink and downlink channel, determine down beam shaping weight vector；The second way is base station
According to the PMI (Precoding Matrix Indicator, pre-coding matrix instruction) that UE is fed back, down beam shaping power is calculated
Vector.
But in the transmission mode TM9 of LTE, base station can configure the CSI-RS (Channel-State of 2 ports
Information reference signal, channel state information reference signals), for example, base station can use 8 antennas, that
4 antennas can share an antenna port；If UE at this stage is fixed one using above-mentioned first way
The transmission of uplink SRS is carried out on a uplink antenna, therefore, base station is sent using UE (User Equipment, user equipment)
A channel information can only be calculated in uplink SRS, and can not directly obtain one other channel information, also can not just be calculated
Accurately wave beam forming weight vector relatively.In addition, when using first way, using SRS be calculated wave beam forming weigh to
When amount carries out wave beam forming, it is possible to which the time interval that distance obtains wave beam forming weight vector is longer, and wireless channel has occurred and that
Large change, causes the effect of wave beam forming bad.
If, since PMI is UE in certain set element, chosen according to channel situation using the above-mentioned second way
With element similar in descending channel information, this selection mode certainly exists a certain amount error.
Currently, more accurately wave beam forming weight vector can be calculated there are no a kind of preferable method for TM9, acquisition compared with
Good wave beam forming effect, to effectively promote the performance of user's down beam shaping.
Summary of the invention
To solve the above-mentioned problems, the present invention a kind of generation method and device of wave beam forming weight vector, can be improved wave
The accuracy of beam figuration weight vector, to obtain preferable wave beam forming effect, to effectively promote user's down beam shaping
Performance.
One aspect of the present invention provides a kind of generation method of wave beam forming weight vector, which comprises
Base station executes the time t_bf of wave beam forming as needed, searches and joins with the time t_bf apart from shortest detection
Examine signal reception time t_srs and with the time t_bf apart from shortest pre-coding matrix instruction receiving time t_pmi；
Base station calculates separately the time difference T_ of the time difference T_SRS and time t_bf and t_pmi of time t_bf and t_srs
PMI；
Base station judges whether time difference T_SRS is less than first time threshold and judges time difference T_PMI whether less than
Two time thresholds；
If time difference T_SRS is greater than first time threshold and/or time difference T_PMI greater than second time threshold, base station
Lesser one in both access time difference T_SRS and time difference T_PMI；
When choosing time difference T_SRS, then base station utilizes the SRS received in time t_srs to generate down beam shaping
Weight vector；
When choosing time difference T_PMI, then base station utilizes the PMI received in time t_pmi to generate down beam shaping
Weight vector.
Optionally, if time difference T_SRS is no more than first time threshold and time difference T_PMI is not more than second time threshold
When, the method also includes:
Base station is utilized in the PMI time t_srs SRS received and received in time t_pmi, and reconstruct generates down going wave
Beam figuration weight vector.
Optionally, when the order that base station receives the channel of UE feedback is 1, base station utilizes and receives in time t_srs
The SRS and PMI received in time t_pmi, reconstruct generate down beam shaping weight vector, comprising:
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Its
In, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Base station is according to matrix M generator matrix M1 (m11；m21；m31；……；) and M2 (
……；mn1), wherein M1 is the matrix that n/2 row one arranges, and matrix numerical value is the corresponding numerical value of the 1st row to the n-th/2 row of M；M2
It is the matrix that n/2 row one arranges, matrix numerical value is M'sIt goes to the corresponding numerical value of line n；
Base station calculates a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2Refer to base station in time t_
1 (a of version matrix N for the PMI that pmi is received1；a2) in vector a1And a2；
Base station judges whether direction angle alpha and the difference η of deflection β are less than or equal to preset angle threshold value θ；
If η≤θ, base station selection M is as down beam shaping weight vector.
If η > θ, M1 is obtained M3 according to two coordinate system rotation alphas counterclockwise by base station, and M1 and M3 is merged and generates downlink
Wave beam forming weight vector；Or, M2 is rotated clockwise α according to two coordinate systems by base station obtains M4, M4 and M2 is merged under generating
Row wave beam forming weight vector；Or, base station maximizes criterion according to channel capacity, chooses in both M1 and M2 and make channel capacity most
One changed greatly is used as down beam shaping weight vector；Or, base station maximizes criterion according to channel capacity, M, M1 and M2 tri- is chosen
Channel capacity maximized one is made to be used as down beam shaping weight vector in person.
Optionally, when the order that base station receives the channel of UE feedback is 2, base station utilizes and receives in time t_srs
The SRS and PMI received in time t_pmi, reconstruct generate down beam shaping weight vector, comprising:
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Its
In, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Base station utilizes the 2 (a of version matrix N in the time t_pmi PMI received11a12；a21a22) reconstruct obtain code book N3；
Code book N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The 1st of code book N3 to n/2 row first row numerical value
It is a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is a21；The
Numerical value to n row secondary series is a22；
Base station is modified M using code book N3 and down beam shaping weight vector is calculated.
Optionally, base station is modified M using code book N3 and down beam shaping weight vector is calculated, comprising:
The product of the first column element and M corresponding position element that base station calculates code book N3 obtains M5；
The product of the second column element and M corresponding position element that base station calculates code book N3 obtains M6；
Base station is by M5 and M6 combination producing down beam shaping weight vector.
Another aspect of the present invention provides a kind of generating means of wave beam forming weight vector, and described device includes:
Time searching unit, for executing the time t_bf of wave beam forming as needed, search with the time t_bf away from
It is received from shortest detection reference signal receiving time t_srs and with pre-coding matrix instruction shortest with a distance from the time t_bf
Time t_pmi；
Time difference calculating unit, for calculating the time difference T_SRS and time t_bf and t_ of time t_bf and t_srs
The time difference T_PMI of pmi；
Judging unit, for judging whether time difference T_SRS is less than first time threshold and judges that time difference T_PMI is
It is no to be less than second time threshold；
Time difference selection unit, for being greater than as time difference T_SRS greater than first time threshold and/or time difference T_PMI
When second time threshold, lesser one in both access time difference T_SRS and time difference T_PMI；
First generation unit is used for when choosing time difference T_SRS, using in the case where the SRS that time t_srs is received is generated
Row wave beam forming weight vector；
Second generation unit is used for when choosing time difference T_PMI, using in the case where the PMI that time t_pmi is received is generated
Row wave beam forming weight vector.
Optionally, when the judging result of judging unit is time difference T_SRS no more than first time threshold and time difference T_
When PMI is not more than second time threshold, described device further include:
Reconfiguration unit, for using in the PMI time t_srs SRS received and received in time t_pmi, reconstruct
Generate down beam shaping weight vector.
Optionally, when the order of the channel of UE feedback is 1, the reconfiguration unit, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；
m21；m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Parameter matrix generation module, for according to matrix M generator matrix M1 (m11；m21；m31；……；) and M2 (……；mn1), wherein M1 be n/2 row one arrange matrix, matrix numerical value be M the 1st row extremely
The corresponding numerical value of the n-th/2 row；M2 is the matrix that n/2 row one arranges, and matrix numerical value is M'sIt goes to the corresponding number of line n
Value；
Deflection computing module, for calculating a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2
Refer to base station in the 1 (a of version matrix N of the time t_pmi PMI received1；a2) in vector a1And a2；
Deflection size judgment module, for judging it is preset whether the difference η of direction angle alpha and deflection β is less than or equal to
Angle threshold value θ；If η≤θ, selection module is triggered；If η > θ triggers raw submodule one, generation module two, generation module three
Or generation module four；
Module is chosen, for choosing M as down beam shaping weight vector.
Raw submodule one merges M1 and M3 under generating for M1 to be obtained M3 according to two coordinate system rotation alphas counterclockwise
Row wave beam forming weight vector；
Generation module two obtains M4 for M2 to be rotated clockwise α according to two coordinate systems, M4 and M2 is merged under generating
Row wave beam forming weight vector；
Generation module three is chosen in both M1 and M2 for maximizing criterion according to channel capacity and makes channel capacity most
One changed greatly is used as down beam shaping weight vector；
Generation module four is chosen in M, M1 and M2 three for maximizing criterion according to channel capacity and makes channel capacity
Maximized one is used as down beam shaping weight vector.
Optionally, when the order of the channel of UE feedback is 1, the reconfiguration unit, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；
m21；m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Codebook construction module, for utilizing the 2 (a of version matrix N in the time t_pmi PMI received11a12；a21a22) weight
Structure obtains code book N3；Code book N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The 1st of code book N3 is to n/2 row
The numerical value of first row is a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is
a21；TheNumerical value to n row secondary series is a22；
Down beam shaping weight vector is calculated for being modified using code book N3 to M in correction module.
Optionally, correction module, comprising:
Computational submodule one, the product for the first column element and M corresponding position element that calculate code book N3 obtain M5；
Computational submodule two, the product for the second column element and M corresponding position element that calculate code book N3 obtain M6；
Submodule is combined, is used for M5 and M6 combination producing down beam shaping weight vector.
As can be seen from the above-described embodiment, compared with prior art, the invention has the following advantages that
The present invention is from the angle of wireless channel real-time change, in order to enable down beam shaping weight vector and practical nothing
Line channel more matches, and has comprehensively considered the timeliness of SRS and PMI, selects the higher element of timeliness to generate downlink wave beam
Figuration weight vector.
The present invention in order to guarantee accuracy that timeliness is judged, the present invention using two time differences as evaluation factor, one
A is that base station needs to be implemented the time t_bf and Distance Time t_bf of wave beam forming and receives apart from shortest detection reference signal SRS
The time difference T_SRS of time t_srs；The other is time t_bf and Distance Time t_bf are apart from shortest pre-coding matrix instruction
The time difference T_PMI of PMI receiving time t_pmi；The two evaluation factors can characterize the timeliness of SRS and PMI；When the two
As soon as the time difference has when meeting condition, select the time difference lesser one because the time difference is smaller, then corresponding SRS or
The reliability of PMI is higher, can more reflect the actual conditions of wireless channel, in this way, being based on reliability higher SRS or PMI
The accuracy of the wave beam forming weight vector of generation is just higher, it will be able to preferable wave beam forming effect is obtained, to effectively mention
Rise the performance of user's down beam shaping.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the generation method for wave beam forming weight vector that the embodiment of the present invention one discloses；
The time diagram of SRS, PMI, down beam shaping that Fig. 2 discloses for the present invention；
Fig. 3 is a kind of flow chart of the generation method for wave beam forming weight vector that the embodiment of the present invention two discloses；
Fig. 4 is the vectorial coordinate system that the present invention discloses；
Fig. 5 is a kind of structure chart of the generating means for wave beam forming weight vector that the embodiment of the present invention three discloses；
Fig. 6 is a kind of structure chart of the generating means for wave beam forming weight vector that the embodiment of the present invention four discloses.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Embodiment is described in detail.
Embodiment one
Referring to Fig. 1, a kind of flow chart of the generation method for wave beam forming weight vector that the embodiment of the present invention one discloses such as is schemed
Shown in 1, this method be may comprise steps of:
S11: base station executes the time t_bf of wave beam forming as needed, searches with the time t_bf apart from shortest spy
Survey reference signal receiving time t_srs and with the time t_bf apart from shortest pre-coding matrix instruction receiving time t_pmi.
In order to explain the relationship of above-mentioned several times, it is illustrated below with reference to Fig. 2.
As shown in Fig. 2, base station can determine the time t_bf for needing to be implemented wave beam forming first；Since UE is periodical hair
RSR is sent, therefore, in order to guarantee the timeliness of RSR, the present invention only selects and receiving time t_ of the t_bf apart from shortest RSR
srs；Namely based on time t_bf, the RSR receiving time t_srs apart from the last time at the time point can be searched, meanwhile, it searches
Apart from the PMI receiving time t_pmi of the last time at the time point.Fig. 2 be using t_pmi less than t_srs time relationship as example,
In practical applications, t_pmi may also can be greater than or equal to t_srs.
S12: base station calculates separately the time of the time difference T_SRS and time t_bf and t_pmi of time t_bf and t_srs
Poor T_PMI.
, can be according to formula T_SRS=in specific calculate | t_bf-t_srs | calculate time difference T_SRS；According to formula
T_PMI=| t_bf-t_pmi | calculate time difference T_PMI.
S13: base station judges whether time difference T_SRS is less than first time threshold and judges whether time difference T_PMI is small
In second time threshold.
Here illustratively, in practical applications, first time threshold can be identical as second time threshold size, can also
Not identical with size, the two time thresholds can be preset according to actual needs.
S14: if time difference T_SRS is greater than first time threshold and/or time difference T_PMI greater than second time threshold,
Lesser one in both base station selection time difference T_SRS and time difference T_PMI.
If T_SRS is greater than first time threshold, illustrate that base station receives the time of SRS and base station needs to be implemented downlink wave beam
The time of figuration is apart from each other, it may be considered that the channel conditions at the two time points may have occurred certain variation；Likewise,
When T_PMI was greater than for the second time, illustrate that the time of base station reception PMI needs to be implemented the time phase of down beam shaping with base station
Away from farther out, it may be considered that the channel conditions at the two time points are it can also happen that certain variation；In this case, have to
Selection one is relatively reliable because usually determining down beam shaping weight vector, that is, base station selection time difference T_SRS and time difference
Lesser one in T_PMI the two, that is, choose the closer reference factor of receiving time distance t_bf.
S15: when choosing time difference T_SRS, then base station utilizes the SRS received in time t_srs to generate downlink wave beam
Figuration weight vector.
S16: when choosing time difference T_PMI, then base station utilizes the PMI received in time t_pmi to generate downlink wave beam
Figuration weight vector.
Here illustratively, it is only applicable to TDD system in the way of SRS generation down beam shaping weight vector, mainly
It is because TDD (Time) system is Time-Dependent differentiating uplink and downlink channel, the frequency that uplink and downlink channel uses is identical, therefore, letter
Road situation is also identical.And by PMI generate down beam shaping weight vector in the way of not only can be adapted for TDD system, but also can be with
Suitable for FDD system.
Through the foregoing embodiment, it will thus be seen that utilize method provided by the invention, comprehensively considered the timeliness of SRS and PMI
Property, select the higher element of timeliness to generate down beam shaping weight vector.The present invention in order to guarantee timeliness judge
Accuracy, using two time differences as evaluation factor, one is time t_bf and distance that base station needs to be implemented wave beam forming
The time difference T_SRS of the detection reference signal SRS receiving time t_srs of the last time time t_bf；The other is time t_bf
With the time difference T_PMI of the pre-coding matrix instruction PMI receiving time t_pmi of Distance Time t_bf the last time；The two are commented
The timeliness of SRS and PMI can be characterized by sentencing factor；As soon as selecting the time difference when the two time differences, which have, meets condition
Lesser one, because the time difference is smaller, then the reliability of corresponding SRS or PMI is higher, can more reflect wireless channel
Actual conditions, in this way, the accuracy based on reliability higher SRS or PMI the wave beam forming weight vector generated is just higher, energy
Preferable wave beam forming effect is enough obtained, to effectively promote the performance of user's down beam shaping.
Embodiment two
On the basis of the above embodiment 1, it is also possible to the case where being respectively less than time threshold there are two time differences, that is, if
Time difference T_SRS is no more than first time threshold and when time difference T_PMI is not more than second time threshold, in response to this,
The present invention also provides corresponding implementations.Referring specifically to flow chart shown in Fig. 2.As shown in figure 3, in above-mentioned Fig. 1 method
On the basis of, also add following steps:
S17: base station is utilized in the PMI time t_srs SRS received and received in time t_pmi, under reconstruct generates
Row wave beam forming weight vector.
Since the channel information of UE feedback is 2*2, the order of channel may be 1, it is also possible to be 2；Therefore base station according to
The order of the channel of UE feedback is determined using different reconstruct modes.
First way is to receive the case where order of the channel of UE feedback is 1, in this case, base for base station
Stand using in the PMI time t_srs SRS received and received in time t_pmi, reconstruct generate down beam shaping weigh to
Amount, comprising:
Step 1, base station utilize the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；
mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station.
Step 2, base station is according to matrix M generator matrix M1 (m11；m21；m31；……；) and M2 (……；mn1), wherein M1 be n/2 row one arrange matrix, matrix numerical value be M the 1st row extremely
The corresponding numerical value of the n-th/2 row；M2 is the matrix that n/2 row one arranges, and matrix numerical value is M'sIt goes to the corresponding number of line n
Value.
Step 3, base station calculate a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2Refer to that base station exists
1 (a of version matrix N for the PMI that time t_pmi is received1；a2) in vector a1And a2。
Step 4, base station judge whether direction angle alpha and the difference η of deflection β are less than or equal to preset angle threshold value θ.
Step 5, if η≤θ, base station selection M is as down beam shaping weight vector.
Step 6, if η > θ, M1 is obtained M3 according to two coordinate system rotation alphas counterclockwise by base station, and M1 and M3 is merged life
At down beam shaping weight vector；Or, M2 is rotated clockwise α according to two coordinate systems by base station obtains M4, M4 and M2 is merged
Generate down beam shaping weight vector；Or, base station maximizes criterion according to channel capacity, chooses in both M1 and M2 and make channel
One of maximum capacity is used as down beam shaping weight vector；Or, base station maximizes criterion according to channel capacity, M, M1 are chosen
With make in M2 three channel capacity it is maximized one be used as down beam shaping weight vector.
Below by an example, above-mentioned implementation is explained.
Assuming that base station is using two-port, the structure of 8 antennas, then heterogeneite of the base station based on SRS and uplink and downlink channel,
Pre-coding matrix M (the m of a 8*1 can be calculated11；m21；m31；m41；m51；m61；m71；m81).Being then based on the M can be with
Generate M1 (m11；m21；m31；m41) and M2 (m51；m61；m71；m81)；That is, M1 is made of four rows before M, M2 is by rear the four of M
Row composition.
Base station calculates a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2Refer to base station in time t_
1 (a of version matrix N for the PMI that pmi is received1；a2) in vector a1And a2；Base station judges the difference of direction angle alpha Yu deflection β
Whether η is less than or equal to preset angle threshold value θ；
About the calculation of direction angle alpha, Fig. 4 may refer to, it is assumed that the version matrix N 1 (1 of PMI；- 1), being then based on should
Coordinate system can calculate a1To a2Direction angle alpha be 180 degree；Assuming that the version matrix N 1 (1 of PMI；- j), a can be calculated1
To a2Direction angle alpha be 90 degree；It can be seen that a in conjunction with the coordinate system1To a2Direction angle alpha just refer to it is suitable according to rotating clockwise
Sequence, from a1To a2It is formed by rotation angle.
If η≤θ, base station selection M is as down beam shaping weight vector.
If η > θ, there are many processing modes for base station, for example, base station can be by M1 according to two coordinate system rotation alphas counterclockwise
Obtain M3 (m '51；m′61；m′71；m′81), then M1 and M3 is merged and generates down beam shaping weight vector (m11；m21；m31；
m41；m′51；m′61；m′71；m′81), that is, preceding four row that M1 is measured as down beam shaping omnidirectional, and M3 is assigned as downlink wave beam
Rear four row of shape omnidirectional amount.
If η > θ, M2 can also be rotated clockwise α according to two coordinate systems and obtain M4 (m ' by base station11；m′21；m′31；m
′41), M4 and M2 is merged and generates down beam shaping weight vector (m '11；m′21；m′31；m′41；m51；m61；m71；m81), that is, M4
Four rows before being measured as down beam shaping omnidirectional, and rear four row that M2 is measured as down beam shaping omnidirectional.
If η > θ, base station also maximizes criterion according to channel capacity, chooses and makes channel capacity maximum in both M1 and M2
One changed is used as down beam shaping weight vector.
If η > θ, base station also maximizes criterion according to channel capacity, chooses in M, M1 and M2 three and makes channel capacity most
One changed greatly is used as down beam shaping weight vector.
The second way is to receive the case where order of the channel of UE feedback is 2, in this case, base for base station
Stand using in the PMI time t_srs SRS received and received in time t_pmi, reconstruct generate down beam shaping weigh to
Amount, comprising:
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Its
In, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Utilize the 2 (a of version matrix N of the PMI received in time t_pmi11a12；a21a22) reconstruct obtain code book N3；The code
This N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The numerical value of the 1st to the n/2 row first row of code book N3 is
a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is a21；TheTo n row
The numerical value of secondary series is a22；
Base station is modified M using code book N3 and down beam shaping weight vector is calculated.
Specifically, base station can be accomplished by the following way " M is modified using code book N3, downlink wave beam is calculated
The step of figuration weight vector ".
The product of the first column element and M corresponding position element that base station calculates code book N3 obtains M5；
The product of the second column element and M corresponding position element that base station calculates code book N3 obtains M6；
Base station is by M5 and M6 combination producing down beam shaping weight vector.
Below by an example, above-mentioned implementation is explained.
It is still assumed that base station is using two-port, the structure of 8 antennas, then base station is based on the mutual of SRS and uplink and downlink channel
Pre-coding matrix M (the m of a 8*1 can be calculated in the opposite sex11；m21；m31；m41；m51；m61；m71；m81)。
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Its
In, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；Base station utilizes the version in the time t_pmi PMI received
2 (a of matrix N11a12；a21a22) reconstruct obtain code book N3；Since the antenna number of base station is 8, N3 is the square of eight rows two column
Battle array.
N3 is specifically expressed as follows:For example, 2 (a of version matrix N of PMI11 a12；a21 a22) it is specially 1/2
[1 1；1-1], then reconstructing code book N3 is specially
Then M5 is equal to the corresponding position element product of M and N3 first row, that is,
M5[a11*m11；a11*m21；a11*m31；a11*m41；a21*m51；a21*m61；a21*m71；a21*m81]；
Then M6 is equal to the corresponding position element product of M and N3 secondary series, i.e.,
M6[a12*m11；a12*m21；a12*m31；a12*m41；a22*m51；a22*m61；a22*m71；a22*m81]
The matrix that then the matrix combination producing that two eight rows one of M5 and M6 arrange is arranged at eight rows two, under which is used as
Row wave beam forming weight vector.
From through the foregoing embodiment, it will thus be seen that utilize method provided by the invention, comprehensively considered SRS and PMI when
Effect property, the timeliness of two elements have one be greater than time threshold when, then select the higher element of timeliness to generate down
Row wave beam forming weight vector；In addition, illustrating having for two elements at this time when the timeliness of two elements is both less than time threshold
Effect property it is just very high, in response to this, the present invention also provides corresponding reconstructing methods, i.e., according to two elements of RSR and PMI into
Row reconstruct obtains down beam shaping weight vector, the advantage for playing two elements comprehensive in this way, acquisition more accurately down going wave
Beam figuration weight vector can obtain preferable wave beam forming effect, to effectively promote the performance of user's down beam shaping.
Embodiment three
It is corresponding to above method embodiment one, the present invention also provides a kind of generating means of wave beam forming weight vector,
Structure drawing of device shown in Figure 5, the apparatus may include:
Time searching unit 51 is searched and the time t_bf for executing the time t_bf of wave beam forming as needed
It is connect apart from shortest detection reference signal receiving time t_srs and with the time t_bf apart from shortest pre-coding matrix instruction
T_pmi between time receiving；
Time difference calculating unit 52, for calculating the time difference T_SRS and time t_bf and t_ of time t_bf and t_srs
The time difference T_PMI of pmi；
Judging unit 53, for judging whether time difference T_SRS is less than first time threshold and judges time difference T_PMI
Whether second time threshold is less than；
Time difference selection unit 54, for working as, time difference T_SRS is greater than first time threshold and/or time difference T_PMI is big
When second time threshold, lesser one in both access time difference T_SRS and time difference T_PMI；
First generation unit 55, for being generated using the SRS received in time t_srs when choosing time difference T_SRS
Down beam shaping weight vector；
Second generation unit 56, for being generated using the PMI received in time t_pmi when choosing time difference T_PMI
Down beam shaping weight vector.
Referring to Fig. 6, another structure drawing of device shown in the present invention, which is to increase on the basis of fig. 4, reconstruct
Unit 57, reconfiguration unit are to be used for, when the judging result of judging unit be time difference T_SRS no more than first time threshold and when
Between difference T_PMI be not more than second time threshold when, received using the SRS received in time t_srs and in time t_pmi
PMI, reconstruct generate down beam shaping weight vector.
Optionally, when the order of the channel of UE feedback is 1, the reconfiguration unit, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；
m21；m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Parameter matrix generation module, for according to matrix M generator matrix M1 (m11；m21；m31；……；) and M2 (……；mn1), wherein M1 be n/2 row one arrange matrix, matrix numerical value be M the 1st row extremely
The corresponding numerical value of the n-th/2 row；M2 is the matrix that n/2 row one arranges, and matrix numerical value is M'sIt goes to the corresponding number of line n
Value；
Deflection computing module, for calculating a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2
Refer to base station in the 1 (a of version matrix N of the time t_pmi PMI received1；a2) in vector a1And a2；
Deflection size judgment module, for judging it is preset whether the difference η of direction angle alpha and deflection β is less than or equal to
Angle threshold value θ；If η≤θ, selection module is triggered；If η > θ triggers raw submodule one, generation module two, generation module three
Or generation module four；
Module is chosen, for choosing M as down beam shaping weight vector.
Raw submodule one merges M1 and M3 under generating for M1 to be obtained M3 according to two coordinate system rotation alphas counterclockwise
Row wave beam forming weight vector；
Generation module two obtains M4 for M2 to be rotated clockwise α according to two coordinate systems, M4 and M2 is merged under generating
Row wave beam forming weight vector；
Generation module three is chosen in both M1 and M2 for maximizing criterion according to channel capacity and makes channel capacity most
One changed greatly is used as down beam shaping weight vector；
Generation module four is chosen in M, M1 and M2 three for maximizing criterion according to channel capacity and makes channel capacity
Maximized one is used as down beam shaping weight vector.
Optionally, when the order of the channel of UE feedback is 1, the reconfiguration unit, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；
m21；m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Codebook construction module, for utilizing the 2 (a of version matrix N in the time t_pmi PMI received11a12；a21a22) weight
Structure obtains code book N3；Code book N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The 1st of code book N3 is to n/2 row
The numerical value of first row is a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is
a21；TheNumerical value to n row secondary series is a22；
Down beam shaping weight vector is calculated for being modified using code book N3 to M in correction module.
Optionally, correction module, comprising:
Computational submodule one, the product for the first column element and M corresponding position element that calculate code book N3 obtain M5；
Computational submodule two, the product for the second column element and M corresponding position element that calculate code book N3 obtain M6；
Submodule is combined, is used for M5 and M6 combination producing down beam shaping weight vector.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device class embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The generation method and device of a kind of wave beam forming weight vector provided herein are described in detail above,
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and the explanation of above embodiments is only used
The present processes and its core concept are understood in help；At the same time, for those skilled in the art, according to the application's
Thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as
Limitation to the application.
Claims (6)
1. a kind of generation method of wave beam forming weight vector, which is characterized in that the described method includes:
Base station executes the time t_bf of wave beam forming as needed, searches with the time t_bf apart from shortest detection with reference to letter
Number receiving time t_srs and with the time t_bf apart from shortest pre-coding matrix instruction receiving time t_pmi；
Base station calculates separately the time difference T_PMI of the time difference T_SRS and time t_bf and t_pmi of time t_bf and t_srs；
When base station judges whether time difference T_SRS is less than first time threshold and whether judges time difference T_PMI less than second
Between threshold value；
If time difference T_SRS is greater than first time threshold and/or time difference T_PMI greater than second time threshold, base station selection
Lesser one in both time difference T_SRS and time difference T_PMI；
When choosing time difference T_SRS, then base station utilize the SRS received in time t_srs generate down beam shaping weigh to
Amount；
When choosing time difference T_PMI, then base station utilize the PMI received in time t_pmi generate down beam shaping weigh to
Amount；
If time difference T_SRS is no more than first time threshold and when time difference T_PMI is not more than second time threshold, base station is utilized
In the PMI time t_srs SRS received and received in time t_pmi, reconstruct generates down beam shaping weight vector；
When the order that base station receives the channel of UE feedback is 1, base station is utilized in the time t_srs SRS received and in the time
The PMI that t_pmi is received, reconstruct generate down beam shaping weight vector, comprising:
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Wherein, M is
The matrix that n row one arranges, n indicate the number of antennas of base station；
Base station is according to matrix M generator matrixWith Wherein, M1 is the matrix that n/2 row one arranges, the 1st row that matrix numerical value is M to n-th/
The corresponding numerical value of 2 rows；M2 is the matrix that n/2 row one arranges, and matrix numerical value is M'sIt goes to the corresponding numerical value of line n；
Base station calculates a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2Refer to that base station connects in time t_pmi
1 (a of version matrix N of the PMI received1；a2) in vector a1And a2；
Base station judges whether direction angle alpha and the difference η of deflection β are less than or equal to preset angle threshold value θ；
If η≤θ, base station selection M is as down beam shaping weight vector；
If η > θ, M1 is obtained M3 according to two coordinate system rotation alphas counterclockwise by base station, and M1 and M3 is merged and generates downlink wave beam
Figuration weight vector；Or, M2 is rotated clockwise α according to two coordinate systems by base station obtains M4, M4 and M2 is merged and generates down going wave
Beam figuration weight vector；Or, base station maximizes criterion according to channel capacity, chooses in both M1 and M2 and channel capacity is maximized
One be used as down beam shaping weight vector；Or, base station maximizes criterion according to channel capacity, choose in M, M1 and M2 three
So that channel capacity maximized one is used as down beam shaping weight vector.
2. the method according to claim 1, wherein when base station receive UE feedback channel order be 2 when, base
Stand using in the PMI time t_srs SRS received and received in time t_pmi, reconstruct generate down beam shaping weigh to
Amount, comprising:
Base station utilizes the SRS received in time t_srs to generate pre-coding matrix M (m11；m21；m31；……；mn1)；Wherein, M is
The matrix that n row one arranges, n indicate the number of antennas of base station；
Base station utilizes the 2 (a of version matrix N in the time t_pmi PMI received11 a12；a21 a22) reconstruct obtain code book N3；It should
Code book N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The numerical value of the 1st to the n/2 row first row of code book N3 is equal
It is a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is a21；TheTo n
The numerical value of row secondary series is a22；
Base station is modified M using code book N3 and down beam shaping weight vector is calculated.
3. according to the method described in claim 2, it is characterized in that, base station is modified M using code book N3 is calculated down
Row wave beam forming weight vector, comprising:
The product of the first column element and M corresponding position element that base station calculates code book N3 obtains M5；
The product of the second column element and M corresponding position element that base station calculates code book N3 obtains M6；
Base station is by M5 and M6 combination producing down beam shaping weight vector.
4. a kind of generating means of wave beam forming weight vector, which is characterized in that described device includes:
Time searching unit is searched with the time t_bf distance most for executing the time t_bf of wave beam forming as needed
Short detection reference signal receiving time t_srs and with the time t_bf apart from shortest pre-coding matrix instruction receiving time
t_pmi；
Time difference calculating unit, for calculating the time difference T_SRS and time t_bf and t_pmi of time t_bf and t_srs
Time difference T_PMI；
Judging unit, for judging whether time difference T_SRS is less than first time threshold and judges whether time difference T_PMI is small
In second time threshold；
Time difference selection unit, for being greater than first time threshold and/or time difference T_PMI greater than second as time difference T_SRS
When time threshold, lesser one in both access time difference T_SRS and time difference T_PMI；
First generation unit, for generating down going wave using the SRS received in time t_srs when choosing time difference T_SRS
Beam figuration weight vector；
Second generation unit, for generating down going wave using the PMI received in time t_pmi when choosing time difference T_PMI
Beam figuration weight vector；
When the judging result of judging unit is time difference T_SRS no more than first time threshold and time difference T_PMI is no more than the
When two time thresholds, described device further include:
Reconfiguration unit, for using in the PMI time t_srs SRS received and received in time t_pmi, reconstruct to be generated
Down beam shaping weight vector；
When the order of the channel of UE feedback is 1, the reconfiguration unit, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；m21；
m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Parameter matrix generation module, for according to matrix M generator matrix WithWherein, M1 is the matrix that n/2 row one arranges, and matrix numerical value is M
The corresponding numerical value of the 1st row to the n-th/2 row；M2 is the matrix that n/2 row one arranges, and matrix numerical value is M'sIt goes to line n
Corresponding numerical value；
Deflection computing module, for calculating a1To a2Direction angle alpha and M1 to M2 deflection β；Wherein, a1And a2Refer to base
It stands in the 1 (a of version matrix N of the time t_pmi PMI received1；a2) in vector a1And a2；
Deflection size judgment module, for judging whether direction angle alpha and the difference η of deflection β are less than or equal to preset angle
Threshold θ；If η≤θ, selection module is triggered；If η > θ, raw submodule one, generation module two, generation module three or raw are triggered
At module four；
Module is chosen, for choosing M as down beam shaping weight vector；
M1 and M3 is merged for M1 to be obtained M3 according to two coordinate system rotation alphas counterclockwise and generates down going wave by raw submodule one
Beam figuration weight vector；
Generation module two obtains M4 for M2 to be rotated clockwise α according to two coordinate systems, and M4 and M2 is merged and generates down going wave
Beam figuration weight vector；
Generation module three is chosen in both M1 and M2 and channel capacity is maximized for maximizing criterion according to channel capacity
One be used as down beam shaping weight vector；
Generation module four is chosen for maximizing criterion according to channel capacity and makes channel capacity maximum in M, M1 and M2 three
One changed is used as down beam shaping weight vector.
5. device according to claim 4, which is characterized in that when the order of the channel of UE feedback is 1, the reconstruct is single
Member, comprising:
Pre-coding matrix generation module, for generating pre-coding matrix M (m using the SRS received in time t_srs11；m21；
m31；……；mn1)；Wherein, M is the matrix that n row one arranges, and n indicates the number of antennas of base station；
Codebook construction module, for utilizing the 2 (a of version matrix N in the time t_pmi PMI received11 a12；a21 a22) reconstruct
Obtain code book N3；Code book N3 is the matrix that n row two arranges, and n indicates the number of antennas of base station；The 1st of code book N3 is to n/2 row
The numerical value of one column is a11；1st to the numerical value of n/2 row secondary series be a12；TheNumerical value to n row first row is
a21；TheNumerical value to n row secondary series is a22；
Down beam shaping weight vector is calculated for being modified using code book N3 to M in correction module.
6. device according to claim 5, which is characterized in that the correction module, comprising:
Computational submodule one, the product for the first column element and M corresponding position element that calculate code book N3 obtain M5；
Computational submodule two, the product for the second column element and M corresponding position element that calculate code book N3 obtain M6；
Submodule is combined, is used for M5 and M6 combination producing down beam shaping weight vector.
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| CN108391315B (en) | 2016-11-03 | 2019-03-26 | 华为技术有限公司 | A kind of information transferring method and equipment |
| CN109120321B (en) * | 2017-06-22 | 2021-05-11 | 中兴通讯股份有限公司 | Beam forming method, device, base station and computer readable storage medium |
| US11442135B2 (en) * | 2018-05-31 | 2022-09-13 | Qualcomm Incorporated | Positioning methods for wireless networks that utilize beamformed communication |
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| CN114884633B (en) * | 2021-02-05 | 2023-11-10 | 大唐移动通信设备有限公司 | Downlink scheduling processing method, network equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686500A (en) * | 2008-09-25 | 2010-03-31 | 中国移动通信集团公司 | Method and user terminal for determining correlation parameters, and signal forming method and base station |
| WO2013125917A1 (en) * | 2012-02-23 | 2013-08-29 | 한국전자통신연구원 | Multi-input and multi-output communication method in large-scale antenna system |
| CN103701512A (en) * | 2013-12-16 | 2014-04-02 | 北京北方烽火科技有限公司 | Method and device for determining downlink beam forming weight vector |
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| CN101686500A (en) * | 2008-09-25 | 2010-03-31 | 中国移动通信集团公司 | Method and user terminal for determining correlation parameters, and signal forming method and base station |
| WO2013125917A1 (en) * | 2012-02-23 | 2013-08-29 | 한국전자통신연구원 | Multi-input and multi-output communication method in large-scale antenna system |
| CN103701512A (en) * | 2013-12-16 | 2014-04-02 | 北京北方烽火科技有限公司 | Method and device for determining downlink beam forming weight vector |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
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| CP01 | Change in the name or title of a patent holder |