CN103178886A - Beam forming method, communication stations and mobile stations - Google Patents
Beam forming method, communication stations and mobile stations Download PDFInfo
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- CN103178886A CN103178886A CN2011104323060A CN201110432306A CN103178886A CN 103178886 A CN103178886 A CN 103178886A CN 2011104323060 A CN2011104323060 A CN 2011104323060A CN 201110432306 A CN201110432306 A CN 201110432306A CN 103178886 A CN103178886 A CN 103178886A
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- residential quarter
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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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- 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
Abstract
The invention discloses a beam forming method, communication stations and mobile stations. The beam forming method, the communication stations and the mobile stations are applied to a wireless communication system comprising a plurality of collaborative cells. The beam forming method comprises the steps of enabling the communication station of every collaborative cell to determine weight of three-dimensional beam forming according to pitch angle instruction information and first channel information coming from the communication station of the cell and pitch angle instruction information and second channel information coming from the communication stations of other collaborative cells; and enabling the communication station of every collaborative cell to perform weighting processing on to-be-sent data according to the weight, and sending the data to the mobile station of the cell. By applying the beam forming method, the problems that two-dimensional beam forming cannot be used for distinguishing processing of the mobile stations with different pitch angles and feedback quantity is large in the prior art are solved, co-channel interference of different mobile stations is reduced while the feedback quantity is reduced, and system performance is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of beam form-endowing method, communication station and mobile radio station.
Background technology
Traditional cellular type network topological structure is by the point-to-multipoint transmission mode of a communication station to a plurality of mobile radio stations.Concerning the communication station of cell edge, this transmission mode exists larger minizone co-channel interference.A method that solves this minizone co-channel interference can be united a plurality of communication stations, and between communication station, cooperation mutually, become useful signal to interference signal.This a plurality of communication stations and the system that a plurality of mobile radio stations communicate on identical running time-frequency resource of utilizing is called multicast communication.Cooperative beam moulding (Coordinated Beamforming, referred to as CB) be exactly to use extensively and one of the multicast communication technology that is easy to realize, as shown in Figure 1, two residential quarters mutually cooperate and carry out wave beam forming, travelling carriage 1 utilizes correlation technique, determines that residential quarter 2 is its cooperation cell.Wherein, the method of determining cooperation cell can be: mobile radio station 1 is measured the large scale decline of the communication station arrival mobile radio station 1 at other place, residential quarter, if this large scale decline is satisfied a threshold value with the large scale decline difference that communication station 1 arrives mobile radio station 1, with its cooperation cell as mobile radio station 1, and residential quarters that all participate in cooperation are called the cooperation cell set of mobile radio station 1.For travelling carriage 1, residential quarter 1 is its main cooperation cell, and other cooperation cell such as residential quarter 2 are its auxiliary cooperation cell.Same operation can be determined the cooperation cell set of mobile radio station 2, and in Fig. 1, the main cooperation cell of mobile radio station 2 is residential quarter 2, and auxiliary cooperation cell is residential quarter 1.Here, auxiliary cooperation cell and the main cooperation cell station that relatively moves, as for mobile radio station 1, the cooperation cell set comprises residential quarter 1 and residential quarter 2, and its small area 1 is main cooperation cell, and residential quarter 2 is assisted cells.And for mobile radio station 2, the cooperation cell set also comprises residential quarter 2 and residential quarter 1, and its small area 1 is auxiliary cooperation cell, and residential quarter 2 is main cooperation cell.In addition, the residential quarter number in the cooperation cell set can have more than two, and cooperation cell each other not necessarily.Such as, the cooperation cell set of mobile radio station 1 and the cooperation cell set of mobile radio station 2 can be different.In the present invention, the residential quarter concept can change the concept of corresponding sector into.
Communication station in the cooperation cell set, determine weights of main cooperation cell communication station by mutual cooperation, and with these weights, the data that each antenna element of main cooperation cell communication station sends are weighted processing, make array aim in real time the useful signal direction, and form zero point to suppress interference signal at interference radiating way, namely send data by the wave beam forming technology.
In general, tradition realizes that the method for cooperative beam figuration generally refers to two-dimentional wave beam forming, needs the main cooperation cell of the mobile radio station feedback communication station of assisted cell to the channel matrix information of this mobile radio station.Take shown in Figure 1 cooperation cell system as example, for mobile radio station 1, need feedback communication station 1 to channel matrix information and the pre-coding matrix index of mobile radio station 1, communication station 1 also needs mobile radio station 2 by the channel matrix information of communication station 2 feedback communication stations 1 to mobile radio station 2.This channel matrix information can be by the indirect feedback of pre-coding matrix index, this will depending on the specific implementation algorithm.The pre-coding matrix that pre-coding matrix index and the channel matrix information of communication station 1 by these feedbacks determines its road mobile radio station 1 jointly, the feedback quantity of this algorithm is very large.And traditional wave beam forming can only be distinguished the different mobile radio station of horizontal azimuth, and the same for horizontal azimuth, and the vertical different mobile radio station of the angle of pitch can't be distinguished.As shown in Figures 2 and 3, Fig. 2 shows horizontal azimuth difference, vertical two identical mobile radio stations of the angle of pitch, and Fig. 3 shows two mobile radio stations that horizontal azimuth is identical, the vertical angle of pitch is different.For the vertical different mobile radio station of the angle of pitch in Fig. 3, two-dimentional wave beam forming can't carry out differentiating and processing to it.
Summary of the invention
The invention provides a kind of beam form-endowing method, in correlation technique, two-dimentional wave beam forming can't carry out differentiating and processing and the large problem of feedback quantity to the different mobile radio station of the vertical angle of pitch to solve at least.
According to an aspect of the present invention, a kind of beam form-endowing method is provided, be applied to comprise the wireless communication system of a plurality of cooperation cell, comprise: the communication station of each cooperation cell is according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station; The communication station of each cooperation cell is weighted processing according to weights to sent data, and sends data to the mobile radio station of this residential quarter.
Preferably, the communication station of each cooperation cell is according to before determining the weights of three-dimensional wave beam forming from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and from the angle of pitch indication information of other cooperation cell communication station and second channel information, also comprise: the communication station of each cooperation cell will be sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell, wherein, this cell communication station that calculates for the mobile radio station of each cooperation cell of angle of pitch indication information is to the angle of pitch quantized value of this mobile radio station; The communication station of each cooperation cell receives the angle of pitch indication information from other cooperation cell communication station, and will send to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter; The mobile radio station of each cooperation cell is determined the first channel information according to the angle of pitch indication information of received all cooperation cell communication station, and the first channel information is sent to the communication station of this residential quarter; The communication station of each cooperation cell determines second channel information according to the angle of pitch indication information from other cooperation cell communication station, and the second channel information of determining is sent to the communication station of other cooperation cell.
Preferably, angle of pitch indication information is angle of pitch value 1 or angle of pitch value 0, wherein, angle of pitch value 1 expression vertical direction angle is less than or equal to angle of pitch threshold value, angle of pitch value 0 expression vertical direction angle is greater than angle of pitch threshold value, and when the angle of pitch was defined as the angle of transmitted wave and Z axis positive direction, the vertical direction angle was defined as the cosine value of the angle of pitch, when the angle of pitch was defined as the angle of transmitted wave and Z axis negative direction, the vertical direction angle was defined as the sine value of the angle of pitch.
Preferably, when this residential quarter angle of pitch indication information was angle of pitch value 1, the first channel information comprised the pre-coding matrix index of this residential quarter; When this residential quarter angle of pitch indication information was angle of pitch value 0, the first channel information comprised that the pre-coding matrix index of this residential quarter, channel matrix information and all angle of pitch indication informations of this residential quarter are the second channel information of the cooperation cell of angle of pitch value 0.
Preferably, the transmission means of the angle of pitch indication information between cooperation cell and/or second channel information comprises one of following at least: the transmission means of radio broadcasting, Optical Fiber Transmission mode, coaxial cable transmission means, Double-strand transmission mode.
Preferably, the second channel information communication station that is the cooperation cell of angle of pitch value 0 for all angle of pitch indication informations arrives the channel matrix information of this residential quarter mobile radio station.
Preferably, channel matrix information is that communication station is to the quantized value of the matrix of the channel coefficients formation of travelling carriage or the pre-coding matrix index corresponding with the pre-coding matrix of its correlation minimum.
Preferably, the communication station of each cooperation cell is according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station, comprise: when the angle of pitch indication information from this residential quarter mobile radio station was angle of pitch value 1, the pre-coding matrix corresponding according to the pre-coding matrix index of this residential quarter determined the weights of three-dimensional wave beam forming; Otherwise, be the weights that the pre-coding matrix corresponding to pre-coding matrix index of the channel matrix information of the second channel information of cooperation cell of angle of pitch value 0 and this residential quarter and this residential quarter determined three-dimensional wave beam forming according to all angle of pitch indication informations.
Preferably, the pre-coding matrix corresponding to pre-coding matrix index of the channel matrix information of the second channel information by following at least a kind of mode cooperation cell that is angle of pitch value 0 according to all angle of pitch indication informations and this residential quarter and this residential quarter determined the weights of three-dimensional wave beam forming: believe leakage make an uproar ratio method, ZF method, Game Theory.
According to a further aspect in the invention, a kind of communication station is provided, comprise: the weights determination module is used for according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station; Data transmission blocks is used for being weighted processing according to weights to sent data, and sends data to the mobile radio station of this residential quarter.
Preferably, communication station also comprises: the first receiver module, be used for to receive the angle of pitch indication information from this residential quarter mobile radio station, wherein, angle of pitch indication information calculates for the mobile radio station of each cooperation cell this cell communication station is to the angle of pitch quantized value of this mobile radio station; The first sending module is used for being sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell; The second receiver module be used for to receive the angle of pitch indication information from other cooperation cell communication station; The second sending module is used for being sent to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter; The 3rd receiver module is used for receiving the first channel information from this residential quarter mobile radio station; The second channel determination module is used for determining second channel information according to the first channel information with from the angle of pitch indication information of other cooperation cell communication station; The 3rd sending module is for second channel information being sent to the communication station of other cooperation cell.
According to a further aspect in the invention, a kind of mobile radio station is provided, comprise: angle of pitch indication information determination module, be used for to determine the angle of pitch indication information of this residential quarter, wherein angle of pitch indication information is that mobile radio station this cell communication station that calculates is to the angle of pitch quantized value of self; The 4th sending module is for the angle of pitch indication information of this residential quarter being sent to the communication station of this residential quarter; The 4th receiver module, the angle of pitch indication information from other cooperation cell communication station that be used for to receive that this cell communication station forwards; The first channel determination module is used for determining the first channel information according to the angle of pitch indication information of this residential quarter with from the angle of pitch indication information of other cooperation cell communication station; The 5th sending module is used for the first channel information is sent to this cell communication station.
by the present invention, three-dimensional wave beam forming is applied on coordinated multipoint transmission, by measuring angle of pitch indication information, and determine the first channel information and second channel information according to angle of pitch indication information, and according to angle of pitch indication information, the first channel information and second channel information are determined the weights of three-dimensional wave beam forming, use these weights to be weighted the method for processing to sent data, solved that in the correlation technique, two-dimentional wave beam forming can't carry out differentiating and processing and the larger problem of feedback quantity to the different mobile radio station of the vertical angle of pitch, and then reduced the co-channel interference of different mobile radio stations when reducing feedback quantity, promoted systematic function.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of realizing the cooperative beam figuration according to correlation technique;
Fig. 2 is the wave beam forming varying level azimuth mobile radio station schematic diagram according to correlation technique;
Fig. 3 is the wave beam forming par azimuth mobile radio station schematic diagram according to correlation technique;
Fig. 4 is the flow chart according to the beam form-endowing method of the embodiment of the present invention;
Fig. 5 realizes the schematic diagram of vertical direction interference inhibition according to the method for the wave beam forming of the embodiment of the present invention;
Fig. 6 is the aerial array schematic diagram one of aerial array index take horizontal direction as main sequence according to the preferred embodiment of the invention;
Fig. 7 is the aerial array schematic diagram two of aerial array index take horizontal direction as main sequence according to the preferred embodiment of the invention;
Fig. 8 is the process schematic diagram that wave beam forming three-dimensional according to the cooperation of the embodiment of the present invention realized;
Fig. 9 is the flow chart of three-dimensional according to the preferred embodiment of the invention wave beam forming implementation method;
Figure 10 is the schematic diagram one of the three-dimensional wave beam forming angle of pitch of cooperating according to the preferred embodiment of the invention;
Figure 11 is the schematic diagram two of the three-dimensional wave beam forming angle of pitch of cooperating according to the preferred embodiment of the invention;
Figure 12 is the aerial array schematic diagram one of aerial array index take vertical direction as main sequence according to the preferred embodiment of the invention;
Figure 13 is the aerial array schematic diagram two of aerial array index take vertical direction as main sequence according to the preferred embodiment of the invention;
Figure 14 is the structured flowchart one according to the communication station of the embodiment of the present invention;
Figure 15 is the structured flowchart two according to the communication station of the embodiment of the present invention; And
Figure 16 is the structured flowchart according to the mobile radio station of the embodiment of the present invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
The large problem of feedback quantity in the time of can't carrying out differentiating and processing and cooperation to the different mobile radio station of the vertical angle of pitch in order to solve in correlation technique two-dimentional wave beam forming, the embodiment of the present invention provides a kind of beam form-endowing method, be applied to comprise the wireless communication system of a plurality of cooperation cell, Fig. 4 is the flow chart according to the beam form-endowing method of the embodiment of the present invention, as shown in Figure 4, the method comprises the following steps:
Step S402, the communication station of each cooperation cell is according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station;
Step S404, the communication station of each cooperation cell is weighted processing according to weights to sent data, and sends data to the mobile radio station of this residential quarter.
pass through the embodiment of the present invention, employing is applied to three-dimensional wave beam forming on coordinated multipoint transmission, by measuring angle of pitch indication information, and determine the first channel information and second channel information according to angle of pitch indication information, and according to angle of pitch indication information, the first channel information and second channel information are determined the weights of three-dimensional wave beam forming, use these weights to be weighted the method for processing to sent data, solved that in the correlation technique, two-dimentional wave beam forming can't carry out differentiating and processing and the large problem of cell cooperative feedback quantity to the different mobile radio station of the vertical angle of pitch, and then reduced the co-channel interference of different mobile radio stations when reducing feedback quantity, promoted systematic function.
According to before determining the weights of three-dimensional wave beam forming from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and from the angle of pitch indication information of other cooperation cell communication station and second channel information, can also comprise following processing in the communication station of each cooperation cell:
(1) communication station of each cooperation cell will be sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell, wherein, this cell communication station that calculates for the mobile radio station of each cooperation cell of angle of pitch indication information is to the angle of pitch quantized value of this mobile radio station;
(2) communication station of each cooperation cell receives the angle of pitch indication information from other cooperation cell communication station, and will send to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter;
(3) mobile radio station of each cooperation cell is determined the first channel information according to the angle of pitch indication information of received all cooperation cell communication stations, and the first channel information is sent to the communication station of this residential quarter;
(4) communication station of each cooperation cell determines second channel information according to the angle of pitch indication information from other cooperation cell communication station, and the second channel information of determining is sent to the communication station of other cooperation cell.Wherein second channel information can arrive for the communication station that all angle of pitch indication informations are the cooperation cell of angle of pitch value 0 channel matrix information of this residential quarter mobile radio station, wherein, this channel matrix information can be for communication station to the quantized value of the matrix of the channel coefficients formation of travelling carriage or the pre-coding matrix index corresponding with the pre-coding matrix of its correlation minimum.
Wherein, when being weighted processing to sent data, can leaking the ratio method of making an uproar, ZF method, Game Theory etc. by letter it is processed.Be weighted processing by several different methods to sent data, increased the flexibility of processing procedure.
In the process of the two-dimentional wave beam forming of cooperation, there is very large feedback quantity, when using three microbeam figurations to realize in the process of coordinated multipoint transmission, feedback quantity is still many, based on the consideration that reduces feedback quantity, in step S402 implementation, increased the process of judgement angle of pitch indication information.When the angle of pitch indication information from this residential quarter mobile radio station was angle of pitch value 1, the pre-coding matrix corresponding according to the pre-coding matrix index of this residential quarter determined the weights of three-dimensional wave beam forming; If during angle of pitch value 0, pre-coding matrix corresponding to pre-coding matrix index that is the channel matrix information of the second channel information of cooperation cell of angle of pitch value 0 and this residential quarter and this residential quarter according to all angle of pitch indication informations determined the weights of three-dimensional wave beam forming.In this step, need to judge angle of pitch indication information, Fig. 5 realizes the schematic diagram of vertical direction interference inhibition according to the method for the wave beam forming of the embodiment of the present invention.The deterministic process that increases can greatly reduce the feedback quantity in the process of the three-dimensional wave beam forming of cooperation.
In implementation process, angle of pitch indication information is that the implication of angle of pitch value 1 and 0 expression of angle of pitch value is not identical, wherein, angle of pitch value 1 can represent that the vertical direction angle is less than or equal to angle of pitch threshold value, angle of pitch value 0 can represent that the vertical direction angle is greater than angle of pitch threshold value, when the angle of pitch is defined as the angle of transmitted wave and Z axis positive direction, the vertical direction angle is defined as the cosine value of the angle of pitch, when the angle of pitch was defined as the angle of transmitted wave and Z axis negative direction, the vertical direction angle was defined as the sine value of the angle of pitch.Certainly, angle of pitch value is artificial definition, can represent with 0 and 1, also can represent with 1 and 2, and the relation of this angle of pitch value and angle of pitch threshold value is also artificial the definition, for example, angle of pitch value 1 also can represent the vertical direction angle greater than angle of pitch threshold value, and angle of pitch value 0 can represent that also the vertical direction angle is less than or equal to angle of pitch threshold value.
When this residential quarter angle of pitch indication information was angle of pitch value 1, the first channel information comprised the pre-coding matrix index of this residential quarter; When this residential quarter angle of pitch indication information was angle of pitch value 0, the first channel information comprised that the pre-coding matrix index of this residential quarter, channel matrix information and all angle of pitch indication informations of this residential quarter are the second channel information of the cooperation cell of angle of pitch value 0.
In the process of processing above-mentioned information, the angle of pitch indication information between cooperation cell and second channel information can be by the modes of radio broadcasting, and the wire transmission modes such as optical fiber, coaxial cable, twisted-pair feeder transmit.
Preferred embodiment
The present embodiment is applied to planar antenna array with the multicast communication technology of this applying three-dimensional wave beam forming, in the present embodiment, and can be with the multicast communication technology of this applying three-dimensional wave beam forming the three-dimensional wave beam forming of cooperation.Planar array antenna as shown in Figure 6 and Figure 7.The aerial array index is arranged take horizontal direction as main sequence, namely first ranked first row, then ranked second row, to the last delegation.Aerial array on the X-Z plane as shown in Figure 6, the aerial array on Y-Z plane is as shown in Figure 7.Communication station has N in the horizontal direction
HThe root antenna has N in vertical direction
VThe root antenna.A plurality of residential quarters are arranged in the network of wireless communication system, as shown in Figure 8, for residential quarter 1, by the measurement that large scale declines, judge that the residential quarter of its cooperation comprises N
CIndividual residential quarter, this N
CThe communication station of individual residential quarter and mobile radio station send data on identical running time-frequency resource, its time/frequency source block carrier index is l=1 ..., N
S, N
SCarrier wave number on the expression Resource Block, it can be only pilot frequency carrier wave or data carrier, can be also pilot tone and data carrier, and on this identical running time-frequency resource, the mobile radio station number of the communication station service of each residential quarter is 1, represents in order to simplify lower target, and we stipulate that the communication station call number in same residential quarter, the call number of mobile radio station all follow the call number of residential quarter identical, for example, communication station call number corresponding to cell i is i, and the call number that mobile radio station is corresponding is i, i=1,, N
C
As shown in Figure 9, be the flow chart of three-dimensional according to the preferred embodiment of the invention wave beam forming implementation method.Communication station in cooperation cell and the mobile radio station three-dimensional wave beam forming of can realizing as follows cooperating:
Step S902, the mobile radio station in each cooperation cell calculate respectively its cell communication station, place to the angle of pitch indication information of mobile radio station, and this angle of pitch indication information are fed back to the communication station of this residential quarter.Angle of pitch indication information can calculate as follows:
Obtain this cell communication station to the overall channel matrix coefficient H (l) of mobile radio station by channel estimating.For j=1 ..., N
H, l=1 ..., N
S, the channel coefficient matrix H of extraction vertical direction
V(l, j), it satisfies m by all column indexes in H (l)
i=(i-1) N
H+ j, i=1 ..., N
VThe matrix that consists of of row.Wherein, the element h in H (l)
N, m(l) the expression m of communication station root antenna is to the channel coefficients of mobile radio station n root antenna on l carrier wave on Resource Block, n=1 ..., N
R, m=(i-1) N
H+ j, j, i=1 ..., N
V, j=1 ..., N
H, N
RThe number of antennas of expression mobile radio station, N
HExpression communication station aerial array number of antennas in the horizontal direction, N
VExpression communication station aerial array number of antennas in the vertical direction;
Calculate the correlation matrix of vertical direction according to the channel coefficient matrix of vertical direction
Calculate the excitation vector e of vertical direction
VCorrelation matrix R with vertical direction
VThe absolute value of quadratic form
Wherein, the excitation vector of vertical direction
Wherein, the conjugate transpose of subscript H representing matrix, the transposition of subscript T representing matrix.
[π, π) scope in search for and make
Get peaked θ
V, max, wherein, if angle of pitch definition is as shown in figure 10, be the angle of transmitted wave and Z axis positive direction, increase in the direction of the clock, scope is [0, π],
If angle of pitch definition is as shown in figure 11, be the angle of transmitted wave and Z axis negative direction, by counterclockwise increasing, scope is
Wherein, λ is the wavelength of radio wave, d
zBay spacing in vertical direction, φ
maxBe this cell communication station to the angle of pitch of mobile radio station, and definition
Be the vertical direction angle.
To vertical direction angle Ω
VQuantize, work as Ω
VWhen being less than or equal to the characteristic value threshold value, it is angle of pitch value 1, otherwise is angle of pitch value 0.And indicate to feed back to the communication station of this residential quarter with 1bit information.Usually, can represent angle of pitch value 1 with 1, represent angle of pitch value 0 with 0.
Step S904, the communication station of each residential quarter receives the angle of pitch indication information from this residential quarter mobile radio station, and angle of pitch indication information is sent to the communication station of other cooperation cell.
Step S906, the communication station of each residential quarter receive the angle of pitch indication information from other cooperation cell communication station, and angle of pitch indication information are sent to the mobile radio station of this residential quarter.
Step S908, the mobile radio station of each residential quarter receive that this cell communication station sends angle of pitch indication information, and utilize the angle of pitch indication information of all cooperation cell to determine the first channel information.Definite and the feedback of the first channel information can be passed through following process implementation.
According to this cell communication station overall channel matrix coefficient H (l) to mobile radio station, l=1 ..., N
SCalculate pre-coding matrix, and the pre-coding matrix index that this pre-coding matrix is corresponding is as the part of the first channel information.
If the angle of pitch indicated value of this residential quarter is 0, the overall channel matrix coefficient H (l) of mobile radio station is arrived at this cell communication station, l=1 ..., N
SQuantized value or the pre-coding matrix index corresponding with its pre-coding matrix that mates most as the part of the first channel information.
If the angle of pitch value of this residential quarter be 0 and this residential quarter be auxiliary cooperation cell as other cooperation cell, concerning all the main cooperation cell take it as auxiliary cooperation cell, if the angle of pitch value of this main cooperation cell is 0, this main cooperation cell communication station is the part of the first channel information to the channel matrix information of this residential quarter mobile radio station.To this cell communication station feedback the first channel information.
Step S910, the communication station of each residential quarter receive the first channel information of this residential quarter mobile radio station feedback, and determine second channel information according to the angle of pitch indication information of other cooperation cell communication station.Can determine by the following method second channel information, and feed back this second channel information to cooperation cell.
If the angle of pitch value of this residential quarter be 0 and this residential quarter be auxiliary cooperation cell as other cooperation cell, main cooperation cell to all take it as auxiliary cooperation cell, if the angle of pitch value of this main cooperation cell is 0, this main cooperation cell communication station is second channel information to the channel matrix information of this residential quarter mobile radio station; Other situation, the second information are empty.Send second channel information to cooperation cell.
Step S912, the communication station of each residential quarter determines the weights of three-dimensional wave beam forming according to all angle of pitch indication informations, the first channel information, second channel information, and sends to the mobile radio station of this residential quarter after data to be sent are processed with three-dimensional beam shape-endowing weight value weighting.Its step is as follows:
When this residential quarter angle of pitch indication information is angle of pitch value 1, be the weights of its three-dimensional wave beam forming with pre-coding matrix corresponding to the pre-coding matrix index of this residential quarter; Otherwise, be that the second channel information of cooperation cell of angle of pitch value 0 and the channel matrix information of this residential quarter and the pre-coding matrix corresponding to pre-coding matrix index of this residential quarter leak based on letter the weights that make an uproar ratio method, ZF method, Game Theory etc. realize determining three-dimensional wave beam forming jointly with all angle of pitch indication informations.
The communication station of each residential quarter is weighted processing according to the three-dimensional beam shape-endowing weight value that calculates to sent data, and the data after weighting is processed send to the communication station of this residential quarter.
Communication station in cooperation cell and mobile radio station, completed the process of cooperation transmission data to step S912 by step S902, they send data on identical running time-frequency resource, and because cooperation generates beam shape-endowing weight value, can significantly reduce co-channel interference, improve the efficiency of transmission of wireless communication system.
For the user on other running time-frequency resource, can first find out similarly its cooperation cell, and complete the process of the three-dimensional wave beam forming of cooperation according to above-mentioned steps.
, namely first ranked first row, then ranked second row take vertical direction as main sequence when the antenna of communication station, to the last row.Aerial array on the X-Z plane as shown in figure 12, the aerial array on Y-Z plane is as shown in figure 13.Communication station has N in the horizontal direction
HThe root antenna has N in vertical direction
VThe root antenna.In this case, if with in step S902 for all j=1 ..., N
H, l=1 ..., N
S, satisfy m by all column indexes in H (l)
i=(j-1) N
V+ i, i=1 ..., N
VThe matrix that consists of of row as the channel coefficient matrix H on vertical direction
V(l, j), wherein, the element h in H (l)
N, m(l) the expression m of communication station root antenna is to the channel coefficients of mobile radio station n root antenna on l carrier wave on Resource Block, n=1 ..., N
R, m=(j-1) N
V+ i, i=1 ..., N
V, j=1 ..., N
H, N
RThe number of antennas of expression mobile radio station, N
HExpression communication station aerial array number of antennas in the horizontal direction, N
VExpression communication station aerial array number of antennas in the vertical direction; L=1 ..., N
SCarrier wave number on the expression Resource Block, it can be only pilot frequency carrier wave or data carrier, can be also pilot tone and data carrier.After revising above-mentioned parameter, can carry out similar computing to it, do not give unnecessary details herein.
Figure 14 is the structured flowchart one according to the communication station of the embodiment of the present invention.As shown in figure 14, this communication station comprises: weights determination module 10 is used for according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station; Data transmission blocks 20 is used for being weighted processing according to weights to sent data, and sends data to the mobile radio station of this residential quarter.
As shown in figure 15, this communication station can also comprise: the first receiver module 30, be used for to receive the angle of pitch indication information from this residential quarter mobile radio station, wherein, angle of pitch indication information calculates for the mobile radio station of each cooperation cell this cell communication station is to the angle of pitch quantized value of this mobile radio station; The first sending module 40 is used for being sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell; The second receiver module 50 be used for to receive the angle of pitch indication information from other cooperation cell communication station; The second sending module 60 is used for being sent to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter; The 3rd receiver module 70 is used for receiving the first channel information from this residential quarter mobile radio station; Second channel determination module 80 is used for determining second channel information according to the first channel information with from the angle of pitch indication information of other cooperation cell communication station; The 3rd sending module 90 is for second channel information being sent to the communication station of other cooperation cell.
Figure 16 is the structured flowchart according to the mobile radio station of the embodiment of the present invention.As shown in figure 16, this mobile radio station can comprise: angle of pitch indication information determination module 100, be used for to determine the angle of pitch indication information of this residential quarter, and wherein angle of pitch indication information is that mobile radio station this cell communication station that calculates is to the angle of pitch quantized value of self; The 4th sending module 102 is for the angle of pitch indication information of this residential quarter being sent to the communication station of this residential quarter; The 4th receiver module 104, the angle of pitch indication information from other cooperation cell communication station that be used for to receive that this cell communication station forwards; The first channel determination module 106 is used for determining the first channel information according to the angle of pitch indication information of this residential quarter with from the angle of pitch indication information of other cooperation cell communication station; The 5th sending module 108 is used for the first channel information is sent to this cell communication station.
As can be seen from the above description, the present invention has realized following technique effect:
Three-dimensional wave beam forming is a kind of wave beam forming technology of considering simultaneously a kind of solid of horizontal azimuth and the vertical angle of pitch, it can adjust the level orientation angle adaptively, can adjust adaptively vertical luffing angle again, thereby can distinguish the mobile radio station of different orientations, also can distinguish the mobile radio station of the different angles of pitch.Three-dimensional wave beam forming can realize better that the interference of vertical direction suppresses, it more can satisfy the requirement of coordinated multipoint transmission than traditional wave beam forming, and the feedback quantity that needs still less, can realize better interference suppressioning effect with less feedback quantity, improved the whole link performance of system.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. beam form-endowing method is applied to comprise it is characterized in that the wireless communication system of a plurality of cooperation cell, comprising:
The communication station of each cooperation cell is according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station;
The communication station of described each cooperation cell is weighted processing according to described weights to sent data, and described data is sent to the mobile radio station of described this residential quarter.
2. method according to claim 1, it is characterized in that, the communication station of each cooperation cell also comprises according to before determining the weights of three-dimensional wave beam forming from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and from the angle of pitch indication information of other cooperation cell communication station and second channel information:
The communication station of each cooperation cell will be sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell, wherein, this cell communication station that calculates of the described angle of pitch indication information mobile radio station that is described each cooperation cell is to the angle of pitch quantized value of this mobile radio station;
The communication station of described each cooperation cell receives the angle of pitch indication information from other cooperation cell communication station, and will send to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter;
The mobile radio station of each cooperation cell is determined the first channel information according to the angle of pitch indication information of the angle of pitch indication information of this residential quarter and received other cooperation cell communication station, and described the first channel information is sent to the communication station of this residential quarter;
The communication station of each cooperation cell determines second channel information according to described the first channel information and from the angle of pitch indication information of other cooperation cell communication station, and the described second channel information that will determine sends to the communication station of other cooperation cell.
3. method according to claim 1, it is characterized in that, described angle of pitch indication information is angle of pitch value 1 or angle of pitch value 0, wherein, angle of pitch value 1 expression vertical direction angle is less than or equal to angle of pitch threshold value, angle of pitch value 0 expression vertical direction angle is greater than angle of pitch threshold value, when the angle of pitch is defined as the angle of transmitted wave and Z axis positive direction, the vertical direction angle is defined as the cosine value of the angle of pitch, when the angle of pitch was defined as the angle of transmitted wave and Z axis negative direction, the vertical direction angle was defined as the sine value of the angle of pitch.
4. method according to claim 3, is characterized in that, when this residential quarter angle of pitch indication information was angle of pitch value 1, described the first channel information comprised the pre-coding matrix index of this residential quarter; When this residential quarter angle of pitch indication information was angle of pitch value 0, described the first channel information comprised that the communication station of the pre-coding matrix index of this residential quarter, the channel matrix information of this residential quarter and the cooperation cell that all angle of pitch indication informations are angle of pitch value 0 is to the channel matrix information of this residential quarter mobile radio station.
5. method according to claim 1, is characterized in that, it is one of following that the angle of pitch indication information between cooperation cell and/or the transmission means of described second channel information comprise at least:
The transmission means of radio broadcasting, Optical Fiber Transmission mode, coaxial cable transmission means, Double-strand transmission mode.
6. method according to claim 3, is characterized in that, second channel information is the channel matrix information that the communication station of the cooperation cell of angle of pitch value 0 arrives this residential quarter mobile radio station for all angle of pitch indication informations.
7. method according to claim 6, is characterized in that, described channel matrix information is that communication station is to the quantized value of the matrix of the channel coefficients formation of travelling carriage or the pre-coding matrix index corresponding with the pre-coding matrix of its correlation minimum.
8. method according to claim 3, it is characterized in that, the communication station of each cooperation cell comprises according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station:
When the angle of pitch indication information from this residential quarter mobile radio station was angle of pitch value 1, the pre-coding matrix corresponding according to the pre-coding matrix index of this residential quarter determined the weights of described three-dimensional wave beam forming;
Otherwise, be the weights that the pre-coding matrix corresponding to pre-coding matrix index of the channel matrix information of the second channel information of cooperation cell of angle of pitch value 0 and this residential quarter and this residential quarter determined described three-dimensional wave beam forming according to all angle of pitch indication informations.
9. method according to claim 8, it is characterized in that, the pre-coding matrix corresponding to pre-coding matrix index of the second channel information by following at least a kind of mode cooperation cell that is angle of pitch value 0 according to all angle of pitch indication informations and the channel matrix information of this residential quarter and this residential quarter determined the weights of described three-dimensional wave beam forming:
Letter leaks make an uproar ratio method, ZF method, Game Theory.
10. a communication station, is characterized in that, comprising:
The weights determination module is used for according to from the angle of pitch indication information of this residential quarter mobile radio station and the first channel information and the weights of determining three-dimensional wave beam forming from angle of pitch indication information and the second channel information of other cooperation cell communication station;
Data transmission blocks is used for being weighted processing according to described weights to sent data, and described data is sent to the mobile radio station of described this residential quarter.
11. communication station according to claim 10 is characterized in that, described communication station also comprises:
The first receiver module be used for to receive the angle of pitch indication information from this residential quarter mobile radio station, and wherein, the mobile radio station that described angle of pitch indication information is described each cooperation cell calculates this cell communication station is to the angle of pitch quantized value of this mobile radio station;
The first sending module is used for being sent to from the angle of pitch indication information of this residential quarter mobile radio station the communication station of other cooperation cell;
The second receiver module be used for to receive the angle of pitch indication information from other cooperation cell communication station;
The second sending module is used for being sent to from the angle of pitch indication information of other cooperation cell communication station the mobile radio station of this residential quarter;
The 3rd receiver module is used for receiving the first channel information from this residential quarter mobile radio station;
The second channel determination module is used for determining second channel information according to described the first channel information with from the angle of pitch indication information of other cooperation cell communication station;
The 3rd sending module is for described second channel information being sent to the communication station of other cooperation cell.
12. a mobile radio station is characterized in that, comprising:
Angle of pitch indication information determination module be used for to be determined the angle of pitch indication information of this residential quarter, and wherein angle of pitch indication information is that described mobile radio station this cell communication station that calculates is to the angle of pitch quantized value of self;
The 4th sending module is for the angle of pitch indication information of this residential quarter being sent to the communication station of this residential quarter;
The 4th receiver module, the angle of pitch indication information from other cooperation cell communication station that be used for to receive that this cell communication station forwards;
The first channel determination module is used for determining the first channel information according to the angle of pitch indication information of this residential quarter with from the angle of pitch indication information of other cooperation cell communication station;
The 5th sending module is used for described the first channel information is sent to described cell communication station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110432306.0A CN103178886B (en) | 2011-12-21 | 2011-12-21 | Beam form-endowing method, communication station and movement station |
| PCT/CN2012/071795 WO2013091305A1 (en) | 2011-12-21 | 2012-02-29 | Beam forming method, communication station and mobile station |
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| CN201110432306.0A CN103178886B (en) | 2011-12-21 | 2011-12-21 | Beam form-endowing method, communication station and movement station |
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| CN109120322A (en) * | 2018-06-06 | 2019-01-01 | 西安科技大学 | Multiple cell multi-user's 3D-MIMO beam form-endowing method |
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Also Published As
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|---|---|
| CN103178886B (en) | 2017-12-26 |
| WO2013091305A1 (en) | 2013-06-27 |
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