CN104935365B

CN104935365B - Method and apparatus for multi-user transmission

Info

Publication number: CN104935365B
Application number: CN201410109368.1A
Authority: CN
Inventors: 姜蕾; 王刚; 金石; 韩瑜
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 2014-03-21
Filing date: 2014-03-21
Publication date: 2019-01-01
Anticipated expiration: 2034-03-21
Also published as: CN104935365A

Abstract

The embodiment of the present invention proposes construction, selection and the method and apparatus of scheduling of the pre-coding matrix for MIMO transmission system.Wherein building method includes determining multiple first pre-coding matrixes, to constitute the first precoding codebook；Wherein determine that multiple first pre-coding matrixes can include determining that the complete or collected works of the basic wave beam, wherein each basic wave beam is determined by angle of declination and azimuth；The complete or collected works of the basic wave beam are divided into multiple basic beam subsets；And utilize associated first pre-coding matrix of each construction in the multiple basic beam subset.In some embodiments, in the complete or collected works of the basic wave beam, the multiple basic beam subset and the multiple first pre-coding matrix at least one of be predetermined, or at least partially through receiving the instruction from network node and determination.

Description

Method and apparatus for multi-user transmission

Technical field

The embodiment of the present invention relates to the use of the system that multiple-input and multiple-output (MIMO) is communicated, and relates more specifically to base Multi-user transmission scheme in dual polarization channel and three-dimensional (3D) mimo system of use dicode sheet.

Background technique

The demand driving communication technology of data rate sustainable growth is continued to develop.Increased transmission bandwidth is to improve data A kind of direct approach of rate, such as the communication bandwidth for reaching 100MHz is provided in 3GPP LTE using carrier wave polymerization.However, by In the finiteness of time and frequency resource, the target that the level of resources utilization is always unremitting pursuit in the communication technology is improved.It is multi-purpose Family multiple-input and multiple-output (MU-MIMO) technology can develop new freedom degree using airspace, and can be by same a period of time Multiple users effectively lifting system handling capacity is serviced on frequency resource block simultaneously.The research field of traditional MU-MIMO is confined to two Tie up (2D) horizontal plane.Thus for each wave beam, angle of declination is unique.The introducing of three-dimensional (3D) MIMO will be by according to mesh It marks the adaptive angle of declination for changing each wave beam in position of user and more fully utilizes space resources.

The implementation of MIMO technology will be dependent on the utilization for channel state information (CSI), this usually requires receiving end and estimates Meter channel status is simultaneously fed back to transmitting terminal, for calculating suitable precoding or beam forming parameter in transmitting terminal.For Reduction feedback quantity has had some known researchs.Such as entitled " the Codebook submitted on April 6th, 2010 Design and structure for multi-granular feedback " European patent application EP2556638A1 ([1]) In high order (Rank) and the case where low-rank propose a kind of method for precoding based on this W=W1*W2 of dicode, wherein W1 and W2 be respectively long-term pre-coding matrix (that is, the pre-coding matrix calculated using the long-time statistical of channel state information) and it is short-term in advance Encoder matrix (that is, the pre-coding matrix calculated using the short term statistics of channel state information).In addition, on December 27th, 2011 The Chinese patent application of entitled " a kind of Multi User Adaptive feedback method based on dicode sheet " submitted CN201110443683.4 also refers to the method for precoding based on dicode sheet in ([2]), and gives corresponding multi-user and pass Transmission scheme.And it is published in Personal Indoor and Mobile Radio Communications (PIMRC) 2013IEEE Entitled " A Limited Feedback Scheme for 3D Multiuser MIMO based in international conference The paper ([3]) of Kronecker Product Codebook " has studied 3D MU-MIMO system, and proposes according to best The Limited Feedback 3D beam-forming method of partner's cluster (Best Company Cluster, BCC) principle, where it is proposed in Crow Gram product (Kronecker Product) code book.However it is not mentioned in the case where dual polarized antenna in the prior art at these Efficient precoding how to be carried out to support 3D-MIMO, and how effectively to be fed back to improve the pairing rate of multi-user, thus Improve spectrum utilization efficiency, improves the handling capacity of system.

In fig. 1 it is shown that in the prior art using the example of the system operatio process of precoding.Wherein step 101 It is executed with 102 at UE sections.In step 101, user equipment (UE) receives downlink reference signal, the basic downlink reference Signal estimates long-term CSI statistics, and most matched for the UE and least matched long-term pre- using long-term CSI statistics calculating Encoder matrix, such as the index PMI1 of the long-term pre-coding matrix is obtained, and the index is fed back into base station (BS).In step 102, UE according to the estimation for obtaining compound channel by long-term pre-coding matrix and current short-term channel, and based on the compound channel Estimation select short-term pre-coding matrix (such as the suitable index PMI2 of selection), and calculate channel quality indicator (CQI), The CQI and PMI2 are fed back to base station together.Feedback based on UE, base station execute the operation in step 103-105.In step 103, base station executes user according to long-term feedback value PMI1 and draws cluster and matching operation；In step 104, base station is according to value of feedback CQI Implement user's scheduling；In step 105, base station determines long-term and short-term used in downlink transfer according to value of feedback PMI1 and PMI2 Then pre-coding matrix determines whole MU-MIMO adaptive transmission scheme.

Although proposing the pre-coding scheme based on dicode sheet in the prior art, such as in above-mentioned example In, the freedom degree of space resources is not fully utilized, is especially not efficiently used in the space resources of perpendicular domains.Cause And in the case where different floor of multiple user distributions in same building object, these schemes are difficult to support multi-user transmission.

Accordingly, there exist using new MU-MIMO transmission scheme to solve the above problems, thus more efficiently utilize space The demand of resource.

Summary of the invention

Aiming at the problems existing in the prior art, the embodiment of the present invention proposes a kind of MIMO method for precoding, and The corresponding multi-user transmission scheme with Limited Feedback.

According to an aspect of the present invention, it proposes a kind of pre-coding matrixes for MIMO transmission system Building method, including multiple first pre-coding matrixes of determination, to constitute the first precoding codebook；Wherein each described first prelist Code matrix is associated with one of them of multiple basic beam subsets, and the multiple basic beam subset is by the complete of basic wave beam Collection is obtained by one of following manner:

The complete or collected works of the basic wave beam are divided into the subset not overlapped uniformly；

The complete or collected works of the basic wave beam are divided into uniformly in the partly overlapping subset in horizontal domain；

The complete or collected works of the basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains；And

The complete or collected works of the basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain.

According to one embodiment of present invention, the complete or collected works of basic wave beam described in this method are arranged to uniform planar array Form, wherein with the wave beam angle of declination having the same of a line, and the wave beam azimuth having the same of same row；And The complete or collected works of the basic wave beam are generated by uniform planar aerial array.

According to still another embodiment of the invention, the complete or collected works of basic wave beam described in this method, the multiple basic wave beam At least one in collection and the multiple first pre-coding matrix is predetermined, or is come at least partially through receiving The instruction of automatic network node and determination.

Another alternate embodiment according to the present invention, multiple first pre-coding matrixes of the determination include true in the method The complete or collected works of the fixed basic wave beam, wherein each basic wave beam is determined by angle of declination and azimuth；By the basic wave beam Complete or collected works be divided into multiple basic beam subsets；And it is associated using each construction in the multiple basic beam subset First pre-coding matrix.

According to one embodiment of present invention, pass through in this methodEach described first is prelisted Code matrix is associated with one of them of multiple basic beam subsets, wherein W₁(k) k-th of first pre-coding matrixes, X are indicated_kTable Show k-th of basic beam subset, and k is nonnegative integral value.

According to one embodiment of present invention, this method further comprises determining multiple second pre-coding matrixes, to be used for Constitute double codebook matrix.

According to another aspect of the present invention, a kind of precoding information for MIMO transmission system is proposed Selection method selected from the complete or collected works of basic wave beam most matched basic including the long-time statistical according to channel state information Wave beam and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are divided into multiple bases by one of following manner This beam subset:

The complete or collected works of basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains；And

The complete or collected works of basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain；

And following most matched basic beam subset and least matched is selected from the multiple basic beam subset Basic beam subset, the most matched basic beam subset include the most matched basic wave beam of selection, and described Least matched basic beam subset includes the least matched basic wave beam of selection；And according to selection most The basic beam subset and/or least matched basic beam subset matched select corresponding from multiple first pre-coding matrixes First pre-coding matrix.

According to one embodiment of present invention, the complete or collected works of basic wave beam described in this method are arranged to uniform planar array The form of UPA, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And And the complete or collected works of the basic wave beam are generated by uniform planar aerial array.

According to one embodiment of present invention, in this method the most matched basic beam subset according to selection and/ Or least matched basic beam subset, select corresponding first pre-coding matrix to include: from multiple first pre-coding matrixes The index of most matched basic beam subset and/or least matched basic beam subset according to selection obtains described Index of corresponding first pre-coding matrix in the multiple pre-coding matrix.

According to one embodiment of present invention, in this method the most matched basic beam subset according to selection and/ Or least matched basic beam subset, select corresponding first pre-coding matrix to include: from multiple first pre-coding matrixes According to the most matched basic beam subset and/or least matched basic wave beam subset X_k, according toThe corresponding first pre-coding matrix W selected from multiple first pre-coding matrixes₁(k)。

According to still another embodiment of the invention, according to the long-time statistical of channel state information in this method, from basic wave beam Complete or collected works in select most matched basic wave beam and least matched basic wave beam includes: the length according to the channel state information Phase counts to obtain the feature vector of channel correlation matrix；Based in part in described eigenvector main feature vector and institute It states the distance of each basic wave beam in the complete or collected works of basic wave beam, selects the most matched basic wave beam and described least matched Basic wave beam；And in the case where the multiple basic wave beam sub-portion overlapping divided, based in part on institute Second feature vector is stated in feature vector to select the most matched basic beam subset and the least matched basic wave Beam subset.

According to some embodiments of the present invention, this method further includes according to channel state information in short-term, and selection second is pre- Encoder matrix, for selecting wave beam from given basic beam subset.

In further embodiment of the invention, this method further includes selecting cluster to index by one of following operation CI:

CI is selected equal to the index of selected corresponding first pre-coding matrix；Or

By the multiple basic beam subset or with it is the multiple the first of the multiple basic wave beam subset associations pre- Encoder matrix is arranged to the form of bidimensional uniform planar array, wherein the basic wave beam that every row of the uniform planar array is related to The basic wave beam that each column with same or similar angle of declination, and the uniform planar array is related to have it is identical or Similar azimuth；

The uniform planar array is divided into horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein extremely A few cluster includes more than one basic beam subset or more than one first pre-coding matrix；And

The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes selected described most matched First pre-coding matrix associated by basic beam subset or the most matched basic beam subset, and the 2nd CI The cluster of instruction includes the selected least matched basic beam subset or the least matched basic beam subset The first associated pre-coding matrix.

According to some embodiments of the present invention, this method further comprises at least by the selected pre-coding matrix rope Regard it as and cluster index feeds back to base station.

According to a further aspect of the invention, a kind of dispatching method for MIMO transmission system is provided, Including the channel quality and cluster index CI based in part on user feedback, the primary user to be dispatched is selected；And it determines The pairing user being scheduled simultaneously with the primary user；And when determining there are in the case where the pairing user, at least partly Ground the master is dispatched according to the channel quality, the first pre-coding matrix and CI of user feedback simultaneously on same running time-frequency resource User and the pairing user；Wherein first pre-coding matrix be selected from multiple first pre-coding matrixes, the multiple first The first pre-coding matrix of each of pre-coding matrix and a basic wave beam subset associations, the multiple basic beam subset are It is obtained by the complete or collected works of basic wave beam by one of following manner:

The complete or collected works of basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain.

According to some embodiments of the present invention, anti-by the CI and the primary user that feed back other users in the method The CI of feedback is compared to determine the pairing user, wherein the other users and the primary user feedback CI be respectively by The other users and the primary user pass through one of following operation selection:

By the multiple basic beam subset or with it is the multiple the first of the multiple basic wave beam subset associations pre- Encoder matrix is arranged to the form of bidimensional uniform planar array, wherein the basic wave beam that every row of the uniform planar array is related to The basic wave beam that each column with same or similar angle of declination, and the uniform planar array is related to have it is identical or Similar azimuth；The uniform planar array is divided into horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, Wherein at least one cluster includes more than one basic beam subset or more than one first pre-coding matrix；And

According to still another embodiment of the invention, the complete or collected works of the basic wave beam are arranged to uniform planar battle array in the method The form of column, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；With And the complete or collected works of the basic wave beam are generated by uniform planar aerial array.

In some embodiments of the invention, the complete or collected works of the basic wave beam in this method, the multiple basic wave beam At least one in subset and the multiple first pre-coding matrix is predetermined, or at least partially through reception Instruction from network node and determination.

According to some embodiments of the present invention, pass through in this methodEach described first is prelisted Code matrix is associated with one of them of multiple basic beam subsets, wherein W₁(k) k-th of first pre-coding matrixes, X are indicated_kTable Show k-th of basic beam subset, and k is nonnegative integral value.

According to a further aspect of the invention, a kind of pre-coding matrix for MIMO transmission system is provided Construction equipment, comprising:

First pre-coding matrix determining device, for determining multiple first pre-coding matrixes, to constitute the first precoding code This；Wherein each first pre-coding matrix is associated with one of them of multiple basic beam subsets, the multiple basic Beam subset is to be obtained by the complete or collected works of basic wave beam by one of following manner:

According to some embodiments of the present invention, the complete or collected works of basic wave beam are arranged to the form of uniform planar array, wherein With the wave beam angle of declination having the same of a line, and the wave beam azimuth having the same of same row；And the basic wave The complete or collected works of beam are generated by uniform planar aerial array.

According to still another embodiment of the invention, the complete or collected works of the basic wave beam, the multiple basic beam subset and described At least one in multiple first pre-coding matrixes is predetermined, or carrys out automatic network section at least partially through receiving The instruction of point and determination, and the first pre-coding matrix determining device further comprises storage device, for storing State the pre- of at least one in complete or collected works, the multiple basic beam subset and the multiple first pre-coding matrix of basic wave beam First define, and/or, reception device, for being determined described basic at least partially through the instruction from network node is received At least one of in the complete or collected works of wave beam, the multiple basic beam subset and the multiple first pre-coding matrix.

According to still another embodiment of the invention, the first pre-coding matrix determining device further comprises: beam definitions Device, for determining the complete or collected works of the basic wave beam, wherein each basic wave beam is determined by angle of declination and azimuth；Subset Dividing device, for the complete or collected works of the basic wave beam to be divided into multiple basic beam subsets, and, the first pre-coding matrix structure Device is made, for utilizing associated first pre-coding matrix of each construction in the multiple basic beam subset.

According to still another embodiment of the invention, pass throughBy each first pre-coding matrix with One of them of multiple basic beam subsets is associated, wherein W₁(k) k-th of first pre-coding matrixes, X are indicated_kIt indicates k-th Basic beam subset, and k is nonnegative integral value.

According to some embodiments of the present invention, the construction of the pre-coding matrix for being used for MIMO transmission system is set Standby further comprises the second pre-coding matrix determining device, for determining multiple second pre-coding matrixes, for being constituted dicode This matrix.

According to a further aspect of the invention, a kind of precoding information for MIMO transmission system is provided Selection equipment, comprising: beam selection device, for the long-time statistical according to channel state information, from the complete or collected works of basic wave beam Middle selection and the most matched basic wave beam of present channel and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are logical It crosses one of following manner and is divided into multiple basic beam subsets:

Beam subset selection device, for selecting following most matched basic wave beam from the multiple basic beam subset Subset and least matched basic beam subset, the most matched basic beam subset include the most matched base of selection This wave beam, and the least matched basic beam subset includes the least matched basic wave beam of selection；And the One pre-coding matrix selection device, for most matched basic beam subset and/or least matched base according to selection This beam subset selects corresponding first pre-coding matrix from multiple first pre-coding matrixes.

According to one embodiment of present invention, the complete or collected works of basic wave beam are arranged to the form of uniform planar array UPA, In with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And the basic wave The complete or collected works of beam are generated by uniform planar aerial array.

According to still another embodiment of the invention, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination.

In one embodiment of the invention, the first pre-coding matrix selection device according to selection for most matching Basic beam subset and/or least matched basic beam subset index, obtain corresponding first pre-coding matrix Index in the multiple pre-coding matrix.

In another embodiment of the present invention, the first pre-coding matrix selection device is used for according to described most matched basic Beam subset and/or least matched basic wave beam subset X_k, according toFrom multiple first precoding squares The corresponding first pre-coding matrix W selected in battle array₁(k)。

According to some embodiments of the present invention, beam selection device is used for the long-time statistical according to the channel state information The feature vector of channel correlation matrix is obtained, based in part on main feature vector in described eigenvector and described basic The distance of each basic wave beam in the complete or collected works of wave beam selects the most matched basic wave beam and the least matched basic wave Beam, and, in the case where the multiple basic wave beam sub-portion overlapping divided, based in part on the feature Second feature vector selects the most matched basic beam subset and the least matched basic beam subset in vector.

According to some embodiments of the present invention, the selection of the precoding information for being used for MIMO transmission system is set Standby further includes the second pre-coding matrix selection device, for selecting the second pre-coding matrix according to channel state information in short-term, For selecting wave beam from given basic beam subset.

According to still another embodiment of the invention, the selection of the precoding information for being used for MIMO transmission system is set Standby further comprises cluster index (CI) selection device, for selecting cluster to index CI by one of following operation:

According to another embodiment of the present invention, which further includes feedback device, and being used at least will be selected described pre- Encoder matrix index and cluster index feed back to base station.

According to a further aspect of the invention, a kind of controlling equipment for MIMO transmission system is provided, Including, user selection device indexes CI for the channel quality based in part on user feedback and the cluster of user feedback, Select the primary user to be dispatched, and the determining pairing user being scheduled simultaneously with the primary user；And；Dispatching device is used Determine that there are the channel qualities, the first precoding in the case where the pairing user, based in part on user feedback in working as Matrix and CI dispatch the primary user and the pairing user simultaneously on same running time-frequency resource；Wherein first precoding Matrix is selected from multiple first pre-coding matrixes, the first pre-coding matrix of each of the multiple first pre-coding matrix and one Basic wave beam subset associations, the multiple basic beam subset are to be obtained by the complete or collected works of basic wave beam by one of following manner:

According to some embodiments of the present invention, the user selection device passes through the CI that feeds back other users and the master The CI of user feedback is compared to determine the pairing user, wherein the CI of the other users and primary user feedback is Pass through one of following operation selection by the other users and the primary user respectively:

According to still another embodiment of the invention, wherein the complete or collected works of the basic wave beam are arranged to the shape of uniform planar array Formula, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And it is described The complete or collected works of basic wave beam are generated by uniform planar aerial array.

According to one embodiment of present invention, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination.

In some embodiments of the invention, wherein the multiple first pre-coding matrix passes through Each first pre-coding matrix is associated with one of them of multiple basic beam subsets, wherein W₁(k) it indicates k-th First pre-coding matrix, X_kIndicate k-th of basic beam subset, and k is nonnegative integral value.

Detailed description of the invention

Below with reference to attached drawing embodiment of the present invention will be described in more detail, the similar label in attached drawing refers to identical portions Point.Attached drawing is not necessarily drawn to scale, but is schematically illustrated exemplary embodiment.In the accompanying drawings,

Fig. 1 is in the prior art using the example flow diagram of the system operatio of precoding；

Fig. 2 is the illustrative diagram of single subdistrict in the system using 3D MU-MIMO；

Fig. 3 shows the flow chart of the code constructing method that prelists according to one example embodiment；

It is the schematic diagram of a given launching beam in Fig. 4；

The example of dual polarization uniform planar aerial array is shown in Fig. 5；

Fig. 6 is the schematic diagram of the complete or collected works of the basic wave beam indicated in the form of UPA；

Fig. 7 A-7D is the side that the complete or collected works of basic wave beam are divided into multiple basic beam subsets by embodiment according to the present invention Method schematic diagram；

Fig. 8 shows a basic position view of the beam subset in the complete or collected works of basic wave beam；

Fig. 9 A is the schematic flow chart of the precoding matrix selection method of embodiment according to the present invention；

Fig. 9 B shows the Mapping Examples of the cluster index and the first pre-coding matrix index of embodiment according to the present invention；

Figure 10 shows the flow chart for the illustrative methods that embodiment according to the present invention is scheduled；

Figure 11 shows the exemplary block diagram of the equipment for pre-coding matrix construction of embodiment according to the present invention；

Figure 12 is the exemplary block diagram of the equipment for selecting pre-coding matrix of embodiment according to the present invention；

Figure 13 is the schematic diagram of the equipment for MU-MIMO scheduling of embodiment according to the present invention；And

Figure 14 A shows the sector throughput of the system of the method using embodiment according to the present invention；And

Figure 14 B shows the cell throughout of the system of the method using embodiment according to the present invention.

Specific embodiment

Fig. 2 shows the examples for using single subdistrict in the system of 3D MU-MIMO, and wherein base station (BS) is located in cell The heart, and total K user equipment (UE) is served, it can be assumed that these UE are uniformly distributed in entire cell for the sake of simplicity. In this example for clarity, three UE are only shown.Wherein UE1 and UE2 is located at 8 layers of same seat (first layer is ground) building Interior different floors.It should be noted that the cell shown in Fig. 2 is only illustrative, it actually can have other shapes The overlay area of shape.

Under scene as shown in Figure 2, the UE1 and UE2 of the different floors for being located at same building, traditional bidimensional MIMO (2D-MIMO) cannot spatially distinguish them sometimes, often can not be simultaneously with same time-frequency so as to cause them Scheduling of resource, that is, MU-MIMO can not be used.Which limits the efficiency of the utilization of resources.In order to solve this problem, this hair 3D-MIMO is used in bright embodiment, and proposes efficient precoding building method, precoding selection method, dispatching method And corresponding equipment makes full use of horizontal and vertical space resources.

For illustrative purposes, the embodiment of the present invention is only introduced under the background of 3GPP LTE-A, but such as by field Technical staff is it should be understood that actually the embodiment of the present invention is not limited to this application scenarios.As long as with feature of the invention It is compatible, the embodiment of the present invention can also be applied at present and in other wireless communication systems in future.

The method for precoding of embodiment to facilitate the understanding of the present invention is introduced pass first below by taking downlink as an example Defeated model.

Mode

In downlink, receiving device estimates channel status using downlink pilot signal, and by the channel of estimation Quality indicator (CQI) feeds back to base station.Then base station is scheduled using the value of feedback.For the ease of explaining, here with one For the model of a simplification, wherein base station services two users using MU-MIMO simultaneously, and layer mapping number is 1.It is assumed that when Between the two users for being serviced simultaneously of t be user u and user s, then, user u can be expressed in time t received signal Are as follows:

y_u,t=H_u,tW_u,tx_u,t+H_u,tW_s,tx_s,t+n_u,t (1)

Wherein x_u,t,x_s,tIt is the symbol of base station transmission, which meets following power limited:W_u,tAnd W_s,tIt is to be directed to the pre-coding matrix of user u and user s in time t respectively；H_u,t It is the reception signal y of user u_u,tChannel experienced；n_u,tIndicate multiple additive Gaussian noise, obeying mean value is 0, and variance isFollowing normal distribution:It is indicated to simplify, below by H_u,t、W_u,tAnd W_s,tThe middle expression time Subscript t omit, to be illustrated respectively in the reception signal channel experienced of some time user u and for user u and use The pre-coding matrix of family s.

It is further assumed that using least mean-square error (MMSE) receiver in receiving end, then in the obtained reception of user u The Signal to Interference plus Noise Ratio (SINR) of signal can be indicated with following formula:

WhereinExpression is defined as, ()^-1Expression is inverted, and I indicates unit matrix.By above-mentioned public affairs Formula can be seen that maximize SINR and minimize inter-user interference, pre-coding matrix W_uAnd W_sDesign very It is crucial.In one embodiment of the invention, using the precoding based on dicode sheet, the i.e. pre-coding matrix of user u and user s W_uAnd W_sW can be expressed as₁×W₂Form, wherein W₁It is long-term pre-coding matrix, and W₂It is short-term pre-coding matrix.

Although it should be noted that having carried out some parameter predigestings for brevity herein, such as multi-purpose amount is 2, order It is 1, using dicode sheet, using MMSE receiver etc., but different parameters can be used completely in other embodiments, such as More numbers of users, higher order, single codebook precoding etc., therefore the embodiment of the present invention is not limited to this.Due to these ginsengs Therefore the understanding that number has no effect on to the embodiment of the present invention is not herein enumerated various possible setting parameters.

Introduce separately below the code constructing method that prelists of the embodiment of the present invention, precoding selection method, dispatching method with And corresponding equipment.

The construction of pre-coding matrix

According to an embodiment of the invention, pre-coding matrix building method includes determining multiple first pre-coding matrixes, with structure At the first precoding codebook；Wherein each first pre-coding matrix is one of related to multiple basic beam subsets Connection, the multiple basic beam subset are to be obtained by the complete or collected works of basic wave beam by one of following manner:

Fig. 3 shows the flow chart of the method for precoding construction of an exemplary embodiment according to the present invention.Such as Shown in Fig. 3, this method includes the steps that the complete or collected works 301 of determining basic wave beam, determines that the complete or collected works of the basic wave beam are divided into more A basic wave beam subset X_kStep 302, and determine the use of each basic wave beam subset X_kAssociated the first of construction prelists Code matrix W₁(k) step 303.

According to one embodiment of present invention, in step 301, each basic wave beam in the complete or collected works of the basic wave beam determined It is determined by angle of declination and azimuth.It is shown schematically in Fig. 4 under a given launching beam (grey arrow direction) Tilt angle gamma_tAnd azimuth angle theta_t。

According to an embodiment of the invention, the complete or collected works of the basic wave beam are generated by uniform planar aerial array, for example, dual polarization Uniform planar aerial array (UPA) Topology g eneration, this UPA topology are employed as by 3GPP for base-station antenna array 3D channel model is recommended.The example of dual polarization uniform planar aerial array is shown in FIG. 5.In this example, in the horizontal direction HaveTo dual polarized antenna, have in vertical directionTo dual polarized antenna, they constitute uniform planar aerial array.By the day Each wave beam that linear array generates is determined by angle of declination and azimuth, so that angle of declination and azimuth also can be used in entire space It divides, and thus defines the complete or collected works of basic wave beam.

According to one embodiment of present invention, in step 301, the complete or collected works of basic wave beam are determined by operations described below.[0, π] between select N_vA angle of declination, and N is selected at [0,2 π]_hThe combination of these values then can be covered N by a azimuth_vxN_hIt is a Beam direction, which constitute the complete or collected works of basic wave beam.

According to one embodiment of present invention, the Kronecker in the document [3] that the background technology part of this paper is mentioned Product code book (KPC) can be selected as the complete or collected works of basic wave beam.

According to another embodiment of the invention, the complete or collected works of basic wave beam are predetermined, thus step 301 can The complete or collected works of the basic wave beam are determined by accessing content predetermined.

According to still another embodiment of the invention, step 301 can by from network node (such as base station) receive about The pre-defined information of the complete or collected works of basic wave beam and the complete or collected works for determining the basic wave beam.

According to an embodiment of the invention, the complete or collected works of the basic wave beam determined can be arranged the shape of UPA as shown in FIG. 6 Formula.In the example depicted in fig. 6, same angle of declination is shared with the wave beam in a line, but difference shown in having on the left of Fig. 6 Azimuth；And the wave beam in same row shares same azimuth, but there is different as shown in the right side in Fig. 6 have a down dip Angle.Each basic wave beam c_iIt can be expressed as N_TxThe vector of x 1, wherein N_TxFor the number of the antenna for generating the wave beam, I is 0 to N_vxN_h- 1 integer.

According to one embodiment of present invention, in step 302, the complete or collected works of the basic wave beam are divided into multiple basic wave beams Subset X_k, wherein k=0,1 ..., K, K are the number of basic beam subset.According to one embodiment of present invention, can pass through The complete or collected works of the basic wave beam are divided into the subset that does not overlap uniformly to obtain the multiple basic beam subset, are such as schemed Shown in 7A.In the example of Fig. 7 A, the complete or collected works of basic wave beam are arranged to the uniform planar battle array of 4 rows 32 column, wherein every a line Basic wave beam angle of declination having the same, and the basic wave beam azimuth having the same of each column.The array is equably drawn It is divided into the K=16 basic beam subsets not overlapped, that is, X₀To X₁₅.Each basic wave beam subset X_kIn basic wave beam tool There are close or similar angle of declination and orientation corner characteristics.

It according to another embodiment of the present invention, can be uniformly but partially heavy by being divided into the complete or collected works of the basic wave beam Folded subset obtains the multiple basic beam subset, as shown in Fig. 7 B- Fig. 7 D.In figure 7b, the basic wave being divided into Beam subset is Chong Die with adjacent basic wave beam sub-portion in horizontal domain.Such as subset X in Fig. 7 B₁And X₂Part with overlapping C₄、C₅、C₃₆、C₃₇.In fig. 7 c, the subset for the basic wave beam being divided into is in perpendicular domains and adjacent basic wave beam sub-portion Overlapping.Such as subset X in Fig. 7 C₀=[C₀、C₁、C₂、C₃、C₃₂、C₃₃、C₃₄、C₃₅] and X₈=[C₃₂、C₃₃、C₃₄、C₃₅、C₆₄、C₆₅、 C₆₆、C₆₇] there is the part C being overlapped₃₂-C₃₅.In fig. 7d, the basic beam subset being divided into is equal in horizontal domain and perpendicular domains It is Chong Die with adjacent basic wave beam sub-portion.The method that the basic beam subset of overlapping is obtained shown in Fig. 7 B-7D can produce Raw more basic beam subsets, i.e., more X_k.Such as by the complete of basic wave beam identical with Fig. 7 A in Fig. 7 B-7D The division of collection respectively obtains 32,32 and 64 basic beam subsets, and obtains 16 basic wave beam according to the method for Fig. 7 A Collection.

According to still another embodiment of the invention, it does not need to execute aforesaid operations in step 302, alternatively, by above-mentioned Operate the subset X of obtained basic wave beam_kIt can be predefined and store, in this case, visit can be passed through in step 302 It asks information predetermined and obtains basic beam subset.

According to another embodiment of the invention, the subset X of the basic wave beam obtained by aforesaid operations_kIt can be by fixed in advance Justice and storage (for example, store within network nodes or be stored among both network node and user), for example, can distinguish The subset of the pre-defined basic wave beam obtained according to different demarcation method.In this case, in step 302, can pass through The further signaling about the instruction basic beam subset is received from the network node, such as indicates which kind of division methods obtains Basic wave beam the signaling that should be applied of subset, and determine the basic wave beam subset X_k。

According to one embodiment of present invention, in step 303, by makingCome construct with it is described more The basic wave beam subset X of each of a basic beam subset_kThe associated pre-coding matrix W₁(k), wherein k=0,1 ..., K-1.Basic wave beam subset X_kIt is identified in step 302, each X_kBy N in horizontal direction_bhA wave beam and vertical direction Upper N_bvA wave beam is constituted, that is,N_b=N_bvN_bh.In the example shown in Fig. 7 A, N_bh=4, N_bv=2.Fig. 8 shows a basic position view of the beam subset in the complete or collected works of basic wave beam.

According to another embodiment of the present invention, it can be predefined and deposit according to the pre-coding matrix that above-mentioned steps construct Storage, therefore, step 303 can determine the pre-coding matrix by accessing information predetermined in such an embodiment, Without executing aforesaid operations.

Further embodiment according to the present invention, the process for the code constructing method that prelists further include step 304, for constructing the Two pre-coding matrix W₂.In one embodiment, W₂Form beWhereinFor selection matrix, it is used for From basic wave beam subset X_kIn N_bA basic wave beam is selected in a basic wave beam；According to one embodiment of present invention, e_i ^(Nb)For N_bThe vector of x1, wherein only 1 element is 1, remaining is zero.And α is phase factor, in some embodiments, is limited Limited phase value, such as α=[1 j-1-j].There are 4 phase values and e in α_i ^(Nb)There is N_bA possible value In example, W₂There is 4N_bA possible expression, therefore the W constructed₂With codebook size 4N_b.There is the phase of other numbers in α In the case of, W₂Codebook size can be calculated accordingly, details are not described herein.

In some embodiments, the second pre-coding matrix W2 for meeting above-mentioned structure principle is also possible to be predefined , therefore, second pre-coding matrix can be determined by accessing information predetermined in step 304.

As skilled in the art will understand, some steps in the flow chart shown in Fig. 3 are in some embodiments It is dispensed.Such as when the first domain encoder matrix generated using above-mentioned rule has been predefined, step 301- 302 are dispensed, and in step 303 can be determining described pre- and accessing information predetermined as described above Encoder matrix.For example, in the embodiment only with solid size sheet, it is convenient to omit step 304.

The selection of pre-coding matrix

After obtaining the construction of pre-coding matrix according to the method in Fig. 3, the equipment of the receiving end as MIMO transmission (in the downlink transfer that MIMO be used to wirelessly communicate, which is user equipment) needs to estimate channel status, so The index and other information for feeding back the pre-coding matrix selected from the pre-coding matrix of construction afterwards are to sender, to send Side determines suitable transmission parameter.According to one embodiment of present invention, include in the method for receiving end selection pre-coding matrix Operation as shown in Figure 9 A, in which:

In step 901, for the long-time statistical according to channel state information, select most to match from the complete or collected works of basic wave beam Basic wave beam and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are divided into multiple basic wave beam Collection；

In step 902, select most to match basic beam subset and least from the multiple basic beam subset as follows With basic beam subset so that it is described most match basic beam subset include it is selected it is described most match basic wave beam, and It is described that least to match basic beam subset include selected described least matching basic wave beam；

In step 903, described most match basic beam subset according to selected and/or least match basic beam subset Obtain the first pre-coding matrix of selection.

According to one embodiment of present invention, in step 901 for therefrom selecting most matched basic wave beam and least The complete or collected works of the basic wave beam of matched basic wave beam can be predetermined, and be arranged to uniform planar array (UPA) Form, for example, form as shown in FIG. 6 is arranged to, wherein with the wave beam angle of declination having the same and same row of a line Wave beam azimuth having the same；According to an embodiment of the invention, the complete or collected works of the basic wave beam are by for example as shown in Figure 5 Dual polarization uniform planar aerial array generates.

According to an embodiment of the invention, the complete or collected works of basic wave beam be divided by one of following methods it is the multiple basic Beam subset:

The complete or collected works of the basic wave beam are divided into the subset that does not overlap uniformly to obtain the multiple basic wave beam Subset, for example, as shown in Figure 7 A；

The complete or collected works of the basic wave beam are divided into uniformly the multiple to obtain in the partly overlapping subset in horizontal domain Basic beam subset, for example, as shown in Figure 7 B；

The complete or collected works of basic wave beam are divided into uniformly the multiple basic to obtain in the partly overlapping subset of perpendicular domains Beam subset, for example, as seen in figure 7 c；

The complete or collected works of basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain to obtain Multiple basic beam subsets are stated, for example, as illustrated in fig. 7d.

According to one embodiment of present invention, in step 901, select most to match by operations described below basic wave beam and It is described least to match basic wave beam.Firstly, the correlation matrix of channel is calculated according to the long-time statistical of channel state information,AndTo the correlation matrixSingular value decomposition (SVD) operation is carried out, Obtain main feature vector v₁.Calculate v₁With all basic wave beam (c in Fig. 6_i) the distance between, then selection and v₁Nearest Wave beam c_iAnd farthest wave beam c_j.According to an embodiment of the invention, the c of selection_iAnd c_jMeet following formula respectively:

It, can be according to selection in step 902 since each basic wave beam is included in a basic beam subset The basic wave beam of most matching and least match basic wave beam and determine its corresponding basic beam subset respectively.For example, if in Fig. 7 A Basic wave beam c₃It is chosen as most matching basic wave beam, then its corresponding basic beam subset is X₀.If basic beam subset is It is partly overlapping, such as the situation as shown in Fig. 7 B-7D, then each of select basic wave beam to be included in multiple basic wave beams It concentrates, in this case, the basic beam subset to be selected can not be uniquely determined by the best basic wave beam selected.According to One embodiment of the present of invention, in such a case, it is possible to the second feature vector v of the correlation matrix using channel₂Come into one Walk the basic beam subset that final choice is determined in multiple basic beam subsets corresponding to the wave beam from selection.For example, comparing Wave beam and second feature vector v in multiple basic beam subsets₂Distance.

In step 903, the first pre-coding matrix of selection is further determined that by the basic beam subset selected.According to this hair Bright embodiment, basic wave beam subset X_kWith corresponding first pre-coding matrix W₁(k) relationship are as follows: Therefore according to one embodiment of present invention, the first pre-coding matrix is directly determined by the index of selected basic beam subset Index.

According to one embodiment of present invention, the method for Fig. 9 A further comprises additional step, such as with dotted line in 9A The step of frame is shown.Second pre-coding matrix is wherein selected according to channel state information in short-term in step 904.According to the present invention Embodiment, selected second pre-coding matrix finally determine transmission beam and make receive signal power maximize, example Such as, principle according to the following formula chooses the second pre-coding matrix:

Wherein

According to one embodiment of present invention, the method for Fig. 9 A further comprises step 905, wherein calculating CQI.According to this The embodiment of invention considers long-term pre-coding matrix, the short-term pre-coding matrix of selection, Yi Jike simultaneously in the calculating of CQI Can interference user short-term pre-coding matrix, for example, the CQI for user u can be shown below and calculate:

Assume interference user using the user u long-term pre-coding matrix of least matching selected so that interference in the calculating of above formula It minimizes, meanwhile, consider all short-term pre-coding matrixes that interference user may select, then chooses minimum CQI as it The CQI of conservative estimation.But in a further embodiment, different CQI calculative strategies can also be used, for example, not selecting Worst CQI, but average CQI is selected to estimate as final CQI.

According to one embodiment of present invention, the method for Fig. 9 A further comprises step 906, wherein selection cluster index (CI).It according to one embodiment of present invention, can be by making selected CI be equal to the first selected pre-coding matrix Index obtain CI.

According to another embodiment of the present invention, when the complete or collected works of the basic wave beam of use are larger, alternatively, basic beam subset Number it is more when, in order to improve user's pairing rate of MU-MIMO, can make a cluster correspond to multiple pre-coding matrixes, that is, Corresponding to multiple basic beam subsets；In this case, CI is obtained by operations described below: by multiple basic beam subsets or The form of bidimensional (2D) uniform planar array is arranged to multiple first pre-coding matrixes of multiple basic wave beam subset associations, The basic wave beam that wherein every a line of the uniform planar array is related to has the same or similar angle of declination, and described uniform The basic wave beam that each column of planar array are related to has the same or similar azimuth；The uniform planar array is divided into In horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein at least one cluster includes more than one basic beam subset Or more than one first pre-coding matrix；The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes It is selected most to match basic beam subset or including most matching the first pre-coding matrix associated by basic beam subset, and And the cluster for indicating the 2nd CI includes selected least matching basic beam subset or least matching basic wave beam including this First pre-coding matrix associated by subset.Selecting the benefit of CI in this way is that can guarantee reliable pairing rate and smaller user Between interfere.

According to one embodiment of present invention, mapping or the cluster and of cluster and basic beam subset can be pre-defined The mapping of one encoder matrix, that is, a pre-defined given cluster is mapped to which basic beam subset or the first precoding Matrix.It is direct by the basic beam subset or the first pre-coding matrix that select in step 906 according to the mapping predetermined Obtain the CI.

According to another embodiment of the present invention, by means of from network node information acquisition cluster and basic beam subset Mapping or the mapping of cluster and the first encoder matrix, in step 906 according to the map information of acquisition, by the basic wave selected Beam subset or the first pre-coding matrix obtain the CI.

The Mapping Examples of cluster and the first pre-coding matrix are shown in figures 9 b and 9.As shown in Figure 9 B, the first pre-coding matrix quilt It is divided into horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein at least one cluster includes more than one basic wave Beam subset or more than one first pre-coding matrix.According to one embodiment of present invention, it is arranged to uniform planar array Multiple first pre-coding matrixes every a line correspond to same or similar angle of declination basic wave beam and it is each column pair Ying Yu has same or similar azimuthal basic wave beam.Therefore such mapping, which will lead to, can cover close number in each cluster Purpose azimuth and different number of angle of declination.The result tested and tested according to real system is it can be found that institute in system The azimuthal distribution actually used be it is relatively uniform, and the distribution of angle of declination not be it is equally distributed, therefore, in this way Distribution will be more adaptive to such characteristic, to improve the utilization rate of each cluster.This method is particularly suitable for substantially The more situation of beam subset number.In view of to reduce, code book size, the basic wave beam that precoding codebook includes when long are past in short-term It is past less, cause the division of the complete or collected works to basic wave beam more careful, basic wave beam number of subsets amount is more.In this case, if Still according to it is long when pre-coding matrix PMI1 index dispatched as user and match foundation, then condition only more in number of users Under be paired into power just will not be too low.Therefore in this example, the PMI1 in close position is returned into a CI, thus CI Number reduce, by reduce partner set in a manner of increase pairing rate.After PMI1 is arranged into UPA topological structure, it is contemplated that use The inhomogeneities that the limitation and vertical beam that family is distributed in perpendicular domains divide space, follows uniformly return in the horizontal direction And criterion, and in vertical direction according to the sparse degree at downwards bevel beam angle, such as returned as the example shows using the non-homogeneous of 1:3 And criterion carries out the division of cluster.User can be maximized according to the calculated CI of the exemplary method and is paired into power, ensured simultaneously It is interfered between pairing user as small as possible.

According to one embodiment of present invention, the method for Fig. 9 A further comprises step 907, the step will be selected Pre-coding matrix index (such as selection the first pre-coding matrix and second with the index of encoder matrix), cluster index and letter Road quality information (CQI) feeds back to base station.It should be noted that the period of these information feedback may be not identical, therefore, he Not necessarily in same time feedbacking.Such as first pre-coding matrix index and CI can have same feedback cycle P1, and Two pre-coding matrix indexes and CQI can have another feedback cycle P2.

It is the construction to the pre-coding matrix of embodiment according to the present invention, selection and the introduction of feedback method above. It is explained below on the basis of obtaining the feedback of receiving end, in an embodiment of the present invention, the method that transmitting terminal is scheduled.

The scheduling of MU-MIMO

In fig. 10, it is illustrated that the flow chart for the illustrative methods that embodiment according to the present invention is scheduled.In the example In, dispatching method includes following operation:

It is at least part of to be indexed according to the information relevant to channel quality and cluster of user feedback in step 1001, choosing The primary user to be dispatched is selected, and is determined to the pairing user being scheduled simultaneously with the primary user；

In step 1002 when determining there are in the case where the pairing user, it is at least part of according to user feedback with The relevant information of channel quality, the first pre-coding matrix and cluster index dispatch the primary user simultaneously on same running time-frequency resource With the pairing user.

According to an embodiment of the invention, the first pre-coding matrix of the feedback involved in step 1001 is selected from multiple first Pre-coding matrix, each of this multiple first pre-coding matrix pre-coding matrix and a basic wave beam subset associations.? In one embodiment, multiple first pre-coding matrixes pass throughMode and the multiple basic wave beam Collection is associated with, wherein W₁(k) k-th of first pre-coding matrixes, X are indicated_kIndicate k-th of basic beam subset, and k is non-negative whole Numerical value.

In one embodiment, which is more as obtained from being evenly dividing the complete or collected works of basic wave beam A basic wave beam subset X_kIn one, e.g. one of method described in Fig. 7 A-7D method divides.

According to one embodiment of present invention, the complete or collected works of the basic wave beam are arranged to the shape of uniform planar array (UPA) Formula, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And the base The complete or collected works of this wave beam are generated by uniform planar aerial array.

According to still another embodiment of the invention, wherein the complete or collected works of basic wave beam, multiple basic beam subsets and multiple At least one in one pre-coding matrix is predetermined, or at least partially through finger of the reception from network node Show and determine.

According to one embodiment of present invention, the cluster index e.g. user that wherein user is fed back is according to about in Fig. 9 A Step 906 described in method choice.The CI includes affiliated set CI (the first CI) and optimum jamming partner's set CI ( Two CI), it corresponds respectively to most match basic beam subset and least matches basic beam subset.

According to an embodiment of the invention, the CQI of each user feedback is ranked up by base station (base station) in step 1001, choosing Maximum CQI is selected, and the corresponding UE of maximum CQI is considered as primary user, it is assumed that the user is u.

According to an embodiment of the invention, after determining primary user u, being fed back by comparing the primary user in step 1001 CI and other users feedback CI come determine with the primary user pairing user.For example, if the first CI of primary user u feedback It is (CIi with the 2nd CI_u,CIj_u), then if the CI of another user feedback is exactly (CIj_u,CIi_u), then the user is recognized in base station For the potential pairing user for being primary user.

According to an embodiment of the invention, if obtaining multiple potential pairing users by comparing CI, step 1001 is into one Step include by comparing it is the multiple it is potential pairing user feedback channel quality instruction come therefrom determine one with it is described primary The pairing user that family is dispatched simultaneously.For example, can choose the potential pairing user with maximum CQI as final pairing user.

According to an embodiment of the invention, in step 1002, base station exists in the case where finding pairing user in step 1001 The primary user and the pairing user are dispatched on same running time-frequency resource simultaneously, carries out MU-MIMO transmission；In step 1001 not In the case where finding pairing user, in step 1002, base station optimum jamming partner determined by the 2nd CI of primary user set A user is randomly choosed, is scheduled simultaneously with primary user, or only dispatch primary user, to avoid excessive interference.

The embodiment of equipment corresponding with the above method is introduced below with reference to Figure 11-13.

The example of the construction equipment 1100 for the pre-coding matrix of MIMO transmission system is shown in Figure 11 Property structure.

According to some embodiments of the present invention, construction equipment 1100 includes the first pre-coding matrix determining device 110, is used for Multiple first pre-coding matrixes are determined, to constitute the first precoding codebook；

Wherein each first pre-coding matrix is associated with one of them of multiple basic beam subsets, the multiple Basic beam subset is to be obtained by the complete or collected works of basic wave beam by one of following manner:

The complete or collected works of the basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain

According to one embodiment of present invention, obtained pre- according to the building method of pre-coding matrix as described in Figure 3 Encoder matrix code book can be predetermined, and be stored in transmitting terminal and receiving end.In this case, pre- in order to determine Encoder matrix code book, the first pre-coding matrix determining device 110, does not need the function list for executing operation shown in Fig. 3 Member, but can be completed by storage device 1101 and the device 1102 of control access.

According to another embodiment of the present invention, obtained more according to the building method of pre-coding matrix as described in Figure 3 A precoding matrix codebook can be predetermined, and in order to determine precoding matrix codebook, in receiving end, this is first pre- Encoder matrix determining device 110 includes reception device 1103, for receiving from transmitting terminal (such as network node, base station) about answering This applies the instruction of which precoding matrix codebook, so that it is determined that precoding matrix codebook.

According to still another embodiment of the invention, which alternatively includes for executing Each functional unit of operation shown in Fig. 3, for example, in this case, in order to determine precoding matrix codebook, the first precoding square Battle array determining device 110 includes following device:

Beam definitions device 1111, for determining the complete or collected works of basic wave beam, wherein each basic wave beam is by angle of declination and side Parallactic angle determines；

Subset division device 1112, for the complete or collected works of the basic wave beam to be divided into multiple basic wave beam subset Xs_k,

First pre-coding matrix constructing apparatus 1113, for utilizing each basic wave beam subset X_kConstruct associated first Pre-coding matrix W₁(k), all pre-coding matrixes constructed form the first precoding codebook W₁。

According to one embodiment of present invention, the complete or collected works of the basic wave beam determined in beam definitions device 1111 are arranged to The form of uniform planar array (UPA), wherein with the wave beam angle of declination having the same of a line and the wave beam of same row has Identical azimuth；And the complete or collected works of the basic wave beam are generated by uniform planar aerial array.

According to one embodiment of present invention, beam definitions device 1111 is retouched by executing about the step 301 in Fig. 3 The complete or collected works operated to determine the basic wave beam stated.For example, by selecting N between [0, π]_vA angle of declination, and [0,2 π] selection N_hA azimuth combines these values to cover N_vxN_hA beam direction, to constitute the complete or collected works of basic wave beam；Or The complete or collected works of person's basic wave beam are predetermined, so that beam definitions device 1111 can be by accessing content predetermined And determine the complete or collected works of the basic wave beam；Alternatively, beam definitions device 1111 can be by connecing from network node (such as base station) The pre-defined information that (or receiving by reception device 1103) is received about the complete or collected works of basic wave beam determines the basic wave The complete or collected works of beam.

According to an embodiment of the invention, subset division device 1112 obtains the multiple basic wave by one of following methods Beam subset X_k:

The complete or collected works of the basic wave beam are divided into the subset that does not overlap uniformly to obtain the multiple basic wave beam Subset；

The complete or collected works of the basic wave beam are divided into uniformly the multiple to obtain in the partly overlapping subset in horizontal domain Basic beam subset；

The complete or collected works of basic wave beam are divided into uniformly the multiple basic to obtain in the partly overlapping subset of perpendicular domains Beam subset；

The complete or collected works of basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain to obtain State multiple basic beam subsets.

Equally, in the embodiment that multiple basic beam subsets are predefined, subset division device 1112 can also lead to It crosses and accesses content predetermined and/or determine multiple basic beam subsets and receiving corresponding information from network node.

According to still another embodiment of the invention, the first pre-coding matrix constructing apparatus 1113 is by makingTo construct and each of multiple basic beam subsets base determined by subset division device 1112 This beam subset X_kAssociated first pre-coding matrix W₁(k)。

According to another embodiment of the present invention, construction equipment 1100 further comprises the second pre-coding matrix constructing apparatus 1114, for constructing the second pre-coding matrix W₂, such as W₂Form beWhereinFor selection matrix, It is N_bThe vector of x1, wherein only 1 element is 1, remaining is 0, is used for from basic wave beam subset X_kOne basic wave of middle selection Beam；And α is the phase factor with limited value.

It should be noted that each device shown in the schematic structure of Figure 11 is logic unit, therefore, they can be by hard Part, software, firmware or a combination thereof are implemented；In addition, the function of multiple devices shown in figure in certain embodiments can be by Single device is completed or the function of a device shown in figure in certain embodiments can also be by multiple devices Lai real It is existing.In addition, in some embodiments it is possible to omit certain devices shown in Figure 11, for example, first pre- in some embodiments Device 1100,1101 can be only included in encoder matrix determining device 110, perhaps only include 1102 or only include device 1111-1113；It and/or in certain embodiments also may include other devices not shown in the figure.

Figure 12 is the exemplary structure for selecting the equipment 1200 of pre-coding matrix.In this example, which includes:

Beam selection device 1201 is selected from the complete or collected works of basic wave beam for the long-time statistical according to channel state information Select most matched basic wave beam and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are divided into multiple basic Beam subset；

Beam subset selection device 1202, for selecting following most matching basic wave from the multiple basic beam subset Beam subset and basic beam subset is least matched, described most to match basic beam subset include that the selected most matching is basic Wave beam, and described least to match basic beam subset include selected described least matching basic wave beam；

First pre-coding matrix selection device 1203, for according to it is selected it is described most match basic beam subset and/ Or it least matches basic beam subset and obtains the first pre-coding matrix of selection.

According to one embodiment of present invention, the basic wave beam for most matching with least matching basic wave beam is therefrom selected Complete or collected works be predefined.In some embodiments, the complete or collected works of the basic wave beam are arranged to uniform planar array (UPA) Form, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And The complete or collected works of the basic wave beam are generated by uniform planar aerial array.

According to still another embodiment of the invention, wherein the complete or collected works of the basic wave beam are divided by one of following methods At the multiple basic beam subset:

The complete or collected works of the basic wave beam are divided into uniformly the multiple basic to obtain in the subset of horizontal domain overlapping Beam subset；

The complete or collected works of basic wave beam are divided into and uniformly obtain the multiple basic wave beam in the subset of perpendicular domains overlapping Subset；

It is described more to obtain that the complete or collected works of basic wave beam are divided into the subset being uniformly overlapped in perpendicular domains and horizontal domain A basic beam subset.

According to one embodiment of present invention, it is predefined by multiple basic beam subsets that the above method obtains.

According to an embodiment of the invention, beam selection device 1201 is configured for executing the step 901 combined in Fig. 9 A Described function；According to one embodiment, which obtains channel correlation according to the long-time statistical of channel state information The feature vector of matrix, and based in part in the complete or collected works of main feature vector and basic wave beam in described eigenvector The distance selection of each basic wave beam is described most match basic wave beam and it is described least match basic wave beam, and, beam subset choosing Device 1202 is selected to be configured for executing step 902 described function combined in Fig. 9 A；According to one embodiment, the device 1202 in the case where the multiple basic beam subset divided has overlapping, based in part in described eigenvector The selection of second feature vector sum the basic wave beam of most matching and match basic wave beam least to select the most matching basic wave Beam subset and described least match basic beam subset.

According to another embodiment of the present invention, the first pre-coding matrix selection device 1203, which is configured for executing, combines figure Step 903 described function in 9A；According to one embodiment, the device 903 is according to the beam subset selection device The 1202 selected indexes for most matching basic beam subset and/or least matching basic beam subset obtain selected described The index of first pre-coding matrix.

According to still another embodiment of the invention, which further includes the second pre-coding matrix selection device 1204, is configured For executing step 904 described function combined in Fig. 9 A, according to channel state information in short-term, the second precoding is selected Matrix；Second pre-coding matrix is used to select a basic wave beam in basic beam subset from selected most match to be applicable in In instant channel status.

According to another embodiment of the present invention, which further includes CQI computing device 1205, is configured for executing combination The described operation of step 905 in Fig. 9 A.According to another embodiment of the present invention, which further includes cluster index (CI) selection Device 1206, be configured for execute combine Fig. 9 A described in method step 906 operation, by one of operations described below come Select CI:

CI is selected, so that selected CI is equal to the index of the first selected pre-coding matrix；Alternatively,

By the multiple basic beam subset or the first pre-coding matrix with the multiple basic wave beam subset associations It is arranged to the form of bidimensional (2D) uniform planar array, wherein the basic wave beam tool that every a line of the uniform planar array is related to There are identical angle of declination, and the basic wave beam azimuth having the same that each column of the uniform planar array are related to；It will The uniform planar array is divided at horizontal domain (line direction) uniformly and in the non-uniform multiple clusters of perpendicular domains (column direction), Wherein at least one cluster includes multiple basic beam subsets, or including multiple first pre-coding matrixes；First is selected respectively CI and the 2nd CI, so that cluster indicated by the first CI includes selected described most matching basic beam subset or described The first pre-coding matrix associated by basic beam subset is most matched, and the cluster of the 2nd CI instruction includes selected institute It states and least matches basic beam subset or described least match the first pre-coding matrix associated by basic beam subset.It is this The definition of CI helps to improve pairing rate when MU-MIMO scheduling.

According to another embodiment of the present invention, which further includes feedback device 1207, is combined in Fig. 9 A for executing The described operation of step 907, by the index of selected pre-coding matrix, cluster index and channel quality information feedback to base It stands.It should be noted that the feedback cycle of the first pre-coding matrix index, the second pre-coding matrix index, CQI and CI may Difference, therefore the feedback of these information can occur in different times.In addition, as will be understood by the skilled person in the art, The feedback device may further include for carrying out pretreated device, such as coding and modulation dress to the information to be fed back It sets.

It should also be noted that each device shown in the schematic structure of Figure 12 is logic unit, therefore, they can be by Hardware, software, firmware or a combination thereof are implemented；In addition, the function of multiple devices shown in figure in certain embodiments can be with Completed by single device or the function of a device shown in figure in certain embodiments can also by multiple devices Lai It realizes.In addition, in some embodiments it is possible to omit certain devices shown in Figure 12, and/or may include in figure not Other devices shown.

Figure 13 is the schematic diagram for the equipment 1300 of MU-MIMO scheduling, as shown, the equipment 1300 is wrapped It includes:

User selection device 1301, at least part of according to the related with channel quality and cluster index of user feedback Information, select the primary user to be dispatched, and be determined to the pairing user being scheduled simultaneously with the primary user；And

Dispatching device 1302, it is at least part of anti-according to user for when determining there are in the case where the pairing user The related information with channel quality, the first pre-coding matrix and cluster index of feedback is on same running time-frequency resource described in scheduling simultaneously Primary user and the pairing user.

According to an embodiment of the invention, the first pre-coding matrix that user is fed back is selected from multiple first pre-coding matrixes, The first pre-coding matrix W of each of multiple first pre-coding matrix₁(k) with a basic wave beam subset X_kAssociation, example Such as,The basic beam subset is by being evenly dividing the complete or collected works of basic wave beam (such as according to figure Method either in 7A-7D) obtained from multiple basic wave beam subset Xs_kIn one.

According to one embodiment of present invention, the complete or collected works of basic wave beam are arranged to the form of uniform planar array (UPA), Wherein with the wave beam azimuth having the same of the wave beam of a line angle of declination having the same and same row；And it is described basic The complete or collected works of wave beam are generated by uniform planar aerial array.

One embodiment of the present of invention, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and described At least one in multiple first pre-coding matrixes is predetermined, and is known to sender and recipient, alternatively, receiving Side is to determine at least partially through the instruction from sender is received and be somebody's turn to do at least one.

According to an embodiment of the invention, user selection device 1301 is configured for executing the step 1001 combined in Figure 10 Described operation.For example, in one embodiment, device 1301 determines primary user by the CQI of user feedback first；Pass through It is compared to the CI of the CI of other users feedback and primary user feedback to determine the pairing user.In another reality It applies in example, user selection device 1301, which is further configured, determines multiple pairing users for the CI according to user feedback, And by comparing it is the multiple pairing user feedback channel quality instruction come therefrom determine one with the primary user simultaneously The final pairing user of scheduling.

According to one embodiment of present invention, the cluster index that user is fed back is user according to the step combined in Fig. 9 A Selection method described in 906 is selected, is e.g. selected by operations described below: the uniform planar array is divided into In horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein at least one cluster includes more than one basic beam subset Or more than one first pre-coding matrix；The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes It is selected most to match basic beam subset or including most matching the first pre-coding matrix associated by basic beam subset, and And the cluster for indicating the 2nd CI includes selected least matching basic beam subset or least matching basic wave beam including this First pre-coding matrix associated by subset.

According to one embodiment, the CI that user is fed back can be equal to the index of the first pre-coding matrix, for example, making second CI is equal to the selected index for least matching the first pre-coding matrix associated by basic beam subset.It is according to the present invention another One embodiment, cluster indicated by the CI of user feedback may include multiple first pre-coding matrixes, and cluster and the first precoding The mapping relations of matrix can be as shown in Figure 9 B, and each grey square frame represents PMI1 in figure.In view of to reduce code book ruler in short-term Very little, the basic wave beam that precoding codebook includes when long is often less, causes the division of the complete or collected works to basic wave beam more careful, base This beam subset quantity is more, if still according to it is long when pre-coding matrix PMI1 index as user dispatch and pairing foundation, Power is only paired under conditions of number of users is more just will not be too low.Therefore in this embodiment, close position will be in PMI1 return into a CI, so that the number of CI is reduced, increase pairing rate in a manner of reducing partner's set.PMI1 is arranged At UPA topological structure, it is contemplated that the inhomogeneities that the limitation and vertical beam that user is distributed in perpendicular domains divide space, Uniform merger criterion can be being followed in the horizontal direction, and in vertical direction according to the sparse degree at downwards bevel beam angle, example The division of cluster is such as carried out using the non-homogeneous merger criterion of 1:3.It can be maximized according to the calculated CI of the method for the embodiment User is paired into power, while ensuring to interfere between pairing user as small as possible.

The step 1002 in Figure 10 is combined to be retouched according to an embodiment of the invention, dispatching device 1302 is configured for executing The operation stated.For example, dispatching the primary user and described simultaneously on same running time-frequency resource in the case where finding pairing user User is matched, MU-MIMO transmission is carried out；It is in the case where not finding pairing user, then random in optimum jamming partner set A user is selected, is scheduled simultaneously with primary user, or dispatches primary user only to avoid excessive interference.

Although some embodiments of the present invention are introduced under the background of the downlink of wireless communication, but it is to be understood that The embodiment of the present invention can be equally applied to uplink.The code constructing method that prelists in the embodiment of the present invention can be The sender of MIMO transmission and recipient use, and precoding selection method can be used in the recipient of MIMO transmission, and be dispatched Method can be used in the sender of MIMO transmission.Furthermore it may each be such as bee as the sender of MIMO transmission and recipient The base station of nest net, femto base station, femto base station, relay node, UE, in other possible nodes and other wireless networks Any node.

It should also be noted that each device shown in the schematic structure of Figure 13 is logic unit, therefore, they can be by Hardware, software, firmware or a combination thereof are implemented；In addition, the function of multiple devices shown in figure in certain embodiments can be with Completed by single device or the function of a device shown in figure in certain embodiments can also by multiple devices Lai It realizes.In addition, in some embodiments it is possible to omit certain devices shown in Figure 13, and/or may include in figure not Other devices shown, for example, for controlling, the device of coded modulation and/or transmitting.

In Figure 14 A, shows and obtained in 120 degree of sectors using the 3D MU-MIMO scheduling of the embodiment of the present invention method Handling capacity.There is shown with the results for the different demarcation method (method in Fig. 7 A-D) for using basic beam subset.It is used Main simulation parameter it is as follows:

Base station height: 25m

Radius of society: 500m；

Base station transmitting power: 46dBm

Antenna for base station: the uniform planar array UPA of 8x8；Horizontal space half-wavelength, 2 times of wavelength of vertical interval；

Code book: 3D:KPC, middle cover N_v=16, N_h=32；2D:DFT

Beam subset divides: not being overlapped uniformly: 4x16；It is horizontally overlapping: 4x32；Vertically superposed 8x16；It is horizontal and vertical equal Overlapping: 16x32；

The long-term feedback period: 100TTI；

The short-term feedback period: 1TTI；

User's height: 3 (n-1)+1.5m, wherein n is derived from [1,8]；

User moving speed: 3km/h.

The handling capacity in the case of 2D MU-MIMO is also shown in the figure as a comparison, and providing system user number respectively For 10 and 50 results.Which kind of found out by result in figure, no matter using the basic wave beam subset division side in Fig. 7 A-7D Method, throughput of system are significantly improved relative in the case of 2D.Also, in the case where user is less (10), basic wave beam The difference of the different demarcation method of collection is little, and in the case where user more (50), it is divided into partly overlapping basic wave beam Subset can bring higher handling capacity.

The comparison result of handling capacity in entire cell shown in Figure 14 B, it is similar with Figure 14 A, as the result is shown from whole From the perspective of a cell, the method for embodiment according to the present invention, handling capacity can be significantly improved.

The various aspects that attached drawing describes the embodiment of the present invention are had been combined above.As long as should be noted that side described above Method and structure arrangement concept are applicable in, and the present invention also covers method sequence described above and combination can be envisaged in any of operation, with And combination can be envisaged in node described above, device, module or any of unit.

If in general, the corresponding functional block or unit of process as described above and network node it be only adapted to be Execute the corresponding portion described function can then pass through respectively any of device, with hardware, software, firmware or A combination thereof is implemented.The method and step mentioned can be realized in discrete function block perhaps to be realized by individual plants or method step One or more method and step in rapid can be realized in individual feature block or be realized by individual equipment.

In general, any method and step is suitble to be implemented as software or be implemented by hardware without changing think of of the invention Think.As long as the function as defined in method and step is retained, such software independently of software code and can be can be used Any known or exploitation in the future programming language is specified as such as Java, C++, C and assembler.Such hardware can With independently of type of hardware and can be used it is any known or in the future exploitation hardware technology or these technologies it is any Mixing come implement, such as MOS (metal-oxide semiconductor (MOS)), CMOS (complementary MOS), BiMOS (bipolar MOS), BiCMOS it is (bipolar CMOS), ECL (emitter-coupled logic), TTL (transistor-transistor logic), ASIC (application-specific integrated circuit (integrated circuit)) component, FPGA (field programmable gate array) component, CPLD (Complex Programmable Logic Devices) component or DSP (Digital Signal Processing Device) component etc..Also, this does not exclude to be possible to equipment/device or the function of module not being that hardware is implemented but is carried out For (software) module (such as include on one or more processor or processing system execution/operation it is executable The computer program or computer program product of software code partition) in software a possibility that.And software is in this specification In the sense that include software code, such as include code device or part or computer program or for executing corresponding function Can computer program product and in tangible medium, such as (there is the respective data structures that store on it or code dress Set/part) software that embodies on computer-readable (storage) medium or during may managing at which in the signal or The software (either computer program or computer program product) embodied in chip.

Even if above according to attached drawing referring to the example description present invention and/or exemplary embodiment, it will be understood that they are not It is limited to this.In fact, it is clear to the skilled person that the present invention can be modified in many ways without departing from such as institute here The range of invention disclosed thought.

Claims

1. a kind of building method of the pre-coding matrix for MIMO transmission system, comprising:

Multiple first pre-coding matrixes are determined, to constitute the first precoding codebook；

The complete or collected works of the basic wave beam are divided into uniformly in the partly overlapping subset of perpendicular domains and horizontal domain；

Wherein the complete or collected works of the basic wave beam are arranged to the form of uniform planar array, wherein having with the wave beam of a line identical Angle of declination, and the wave beam azimuth having the same of same row；And the complete or collected works of the basic wave beam are by uniform planar day Linear array column-generation；

Wherein multiple first pre-coding matrixes of the determination include:

The complete or collected works of the basic wave beam are determined, wherein each basic wave beam is determined by angle of declination and azimuth；

The complete or collected works of the basic wave beam are divided into multiple basic beam subsets；And

Utilize associated first pre-coding matrix of each construction in the multiple basic beam subset；

Wherein pass throughBy wherein the one of each first pre-coding matrix and multiple basic beam subsets It is a associated,

Wherein W₁(k) k-th of first pre-coding matrixes, X are indicated_kIndicate k-th of basic beam subset, and k is nonnegative integer Value.

2. according to the method described in claim 1, the wherein complete or collected works of the basic wave beam, the multiple basic beam subset and institute At least one stated in multiple first pre-coding matrixes is predetermined, or carrys out automatic network at least partially through receiving The instruction of node and determination.

3. method described in any claim in -2 according to claim 1, further comprises:

It determines multiple second pre-coding matrixes, to be used to be constituted double codebook matrix, specifically includes:

Construct the second pre-coding matrix W₂, W₂Form beWherein e_i ^(Nb)For selection matrix, it is used for from basic Beam subset X_kIn N_bA basic wave beam is selected in a basic wave beam；e_i ^(Nb)For N_bThe vector of x1, wherein only 1 element It is 1, remaining is zero；α is phase factor；Wherein α=[1j-1-j]；There are 4 phase values and e in α_i ^(Nb)There is N_bIt is a possible Value, W₂There is 4N_bA possible expression.

4. a kind of selection method of the precoding information for MIMO transmission system, comprising:

According to the long-time statistical of channel state information, selection and the most matched basic wave of present channel from the complete or collected works of basic wave beam Beam and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are divided into multiple basic by one of following manner Beam subset:

Most matched basic beam subset and least matched basic beam subset are selected from the multiple basic beam subset, The most matched basic beam subset includes the most matched basic wave beam of selection, and described least matched basic Beam subset includes the least matched basic wave beam of selection；And

Most matched basic beam subset and/or least matched basic beam subset according to selection, from multiple first Corresponding first pre-coding matrix is selected in pre-coding matrix；

Wherein most matched basic beam subset and/or least matched basic beam subset according to selection, from multiple Corresponding first pre-coding matrix is selected to include: in first pre-coding matrix

According to the most matched basic beam subset and/or least matched basic wave beam subset X_k, according toThe corresponding first pre-coding matrix W selected from multiple first pre-coding matrixes₁(k)；

Wherein the multiple first pre-coding matrix is by identified below:

The complete or collected works of the basic wave beam are determined, wherein each basic wave beam is determined by angle of declination and azimuth；By the base The complete or collected works of this wave beam are divided into the multiple basic beam subset；And utilize each structure in the multiple basic beam subset Make associated first pre-coding matrix.

5. according to the method described in claim 4, the wherein complete or collected works of the basic wave beam, the multiple basic beam subset and institute At least one stated in multiple first pre-coding matrixes is predetermined, or carrys out automatic network at least partially through receiving The instruction of node and determination.

6. according to the method described in claim 4, the wherein most matched basic beam subset according to selection and/or least Matched basic beam subset, selects corresponding first pre-coding matrix to include: from multiple first pre-coding matrixes

The index of most matched basic beam subset and/or least matched basic beam subset, obtains according to selection Index of corresponding first pre-coding matrix in the multiple pre-coding matrix.

7. according to the method described in claim 4, wherein according to the long-time statistical of channel state information, from the complete or collected works of basic wave beam The most matched basic wave beam of middle selection and least matched basic wave beam include:

The feature vector of channel correlation matrix is obtained according to the long-time statistical of the channel state information,

Based in part on each basic wave in the complete or collected works of main feature vector and the basic wave beam in described eigenvector The distance of beam selects the most matched basic wave beam and the least matched basic wave beam, and

In the case where the multiple basic wave beam sub-portion overlapping divided, based in part on described eigenvector Middle second feature vector selects the most matched basic beam subset and the least matched basic beam subset.

8. according to the method described in claim 4, further include:

According to channel state information in short-term, the second pre-coding matrix is selected, for selecting from given basic beam subset Wave beam.

9. according to method described in any claim in claim 4-8, further includes:

Cluster is selected to index CI by one of following operation:

By the multiple basic beam subset or the multiple first precoding with the multiple basic wave beam subset associations Matrix arrangements at bidimensional uniform planar array form, wherein the basic wave beam that every row of the uniform planar array is related to has Same or similar angle of declination, and the basic wave beam that each column of the uniform planar array is related to is with same or similar Azimuth；

The uniform planar array is divided into horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein at least one A cluster includes more than one basic beam subset or more than one first pre-coding matrix；And

The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes selected described most matched basic First pre-coding matrix associated by beam subset or the most matched basic beam subset, and the 2nd CI is indicated Cluster include that the selected least matched basic beam subset or the least matched basic beam subset are closed First pre-coding matrix of connection.

10. according to the method described in claim 9, further include:

The index of the selected pre-coding matrix and cluster index are at least fed back into base station.

11. a kind of dispatching method for MIMO transmission system, comprising:

Channel quality and cluster based in part on user feedback index CI, select the primary user to be dispatched, and determine The pairing user being scheduled simultaneously with the primary user；And

When determining there are in the case where the pairing user, based in part on the user feedback channel quality, first Pre-coding matrix and the CI dispatch the primary user and the pairing user simultaneously on same running time-frequency resource；

Wherein first pre-coding matrix is selected from multiple first pre-coding matrixes, every in the multiple first pre-coding matrix A first pre-coding matrix and a basic wave beam subset associations, the multiple basic beam subset is by the complete or collected works of basic wave beam It is obtained by one of following manner:

12. according to the method for claim 11, wherein determining that the pairing user being scheduled simultaneously with the primary user includes:

It is compared to determine the pairing user by the CI of the CI for feeding back other users and primary user feedback, wherein The CI of the other users and primary user feedback is to pass through following operation by the other users and the primary user respectively One of selection:

By the multiple basic beam subset or the multiple first precoding with the multiple basic wave beam subset associations Matrix arrangements at bidimensional uniform planar array form, wherein the basic wave beam that every row of the uniform planar array is related to has Same or similar angle of declination, and the basic wave beam that each column of the uniform planar array is related to is with same or similar Azimuth；The uniform planar array is divided into horizontal domain uniformly and in the non-uniform multiple clusters of perpendicular domains, wherein At least one cluster includes more than one basic beam subset or more than one first pre-coding matrix；And

The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes selected most matched basic beam subset Or the first pre-coding matrix associated by most matched basic beam subset, and the cluster of the 2nd CI instruction includes selected First pre-coding matrix associated by least matched basic beam subset or the least matched basic beam subset.

13. according to the method for claim 11, wherein the complete or collected works of the basic wave beam are arranged to uniform planar array Form, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And

The complete or collected works of the basic wave beam are generated by uniform planar aerial array.

14. according to the method for claim 11, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination.

15. according to the method for claim 11, wherein passing throughBy each first precoding square Battle array is associated with one of them of multiple basic beam subsets,

16. a kind of construction equipment of the pre-coding matrix for MIMO transmission system, comprising:

First pre-coding matrix determining device, for determining multiple first pre-coding matrixes, to constitute the first precoding codebook；

Wherein the complete or collected works of the basic wave beam are arranged to the form of uniform planar array, wherein having with the wave beam of a line identical Angle of declination, and the wave beam azimuth having the same of same row；And

The complete or collected works of the basic wave beam are generated by uniform planar aerial array；

Wherein the first pre-coding matrix determining device further comprises:

Beam definitions device, for determining the complete or collected works of the basic wave beam, wherein each basic wave beam is by angle of declination and side Parallactic angle determines；

Subset division device, for the complete or collected works of the basic wave beam to be divided into multiple basic beam subsets, and

First pre-coding matrix constructing apparatus, for utilizing each construction in the multiple basic beam subset associated the One pre-coding matrix；

Wherein pass throughBy wherein the one of each first pre-coding matrix and multiple basic beam subsets It is a associated, and

17. equipment according to claim 16, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination, and

The first pre-coding matrix determining device further comprises:

Storage device, complete or collected works, the multiple basic beam subset and the multiple first for storing the basic wave beam are in advance The pre-defined and/or reception device of at least one in encoder matrix, for carrying out automatic network section at least partially through reception The instruction of point and complete or collected works, the multiple basic beam subset and the multiple first pre-coding matrix for determining the basic wave beam At least one of in.

18. equipment described in 6 or 17 according to claim 1, further comprises:

Second pre-coding matrix determining device, for determining multiple second pre-coding matrixes, for being constituted double codebook matrix；Tool Body includes:

19. a kind of selection equipment of the precoding information for MIMO transmission system, including,

Beam selection device selects most to match from the complete or collected works of basic wave beam for the long-time statistical according to channel state information Basic wave beam and least matched basic wave beam；Wherein the complete or collected works of the basic wave beam are divided by one of following manner Multiple basic beam subsets:

Beam subset selection device, for selecting most matched basic beam subset and most from the multiple basic beam subset Unmatched basic beam subset, the most matched basic beam subset include the most matched basic wave beam of selection, And the least matched basic beam subset includes the least matched basic wave beam of selection；And

First pre-coding matrix selection device, for the most matched basic beam subset according to selection and/or least The basic beam subset matched selects corresponding first pre-coding matrix from multiple first pre-coding matrixes；

Wherein the complete or collected works of the basic wave beam are arranged to the form of uniform planar array UPA, wherein the wave beam with a line has Identical angle of declination and the wave beam of same row azimuth having the same；And the complete or collected works of the basic wave beam are by uniform planar Aerial array generates；

Wherein the first pre-coding matrix selection device is used for according to the most matched basic beam subset and/or least The basic wave beam subset X matched_K,According toCorresponding first selected from multiple first pre-coding matrixes Pre-coding matrix W₁(k)；

Wherein the multiple first pre-coding matrix is by identified below:

20. equipment according to claim 19, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination.

21. equipment according to claim 19, wherein the first pre-coding matrix selection device is used for according to selection The index of the most matched basic beam subset and/or least matched basic beam subset, obtains corresponding first Index of the pre-coding matrix in the multiple pre-coding matrix.

22. equipment according to claim 19, wherein the beam selection device is used for:

23. equipment according to claim 19, further includes:

Second pre-coding matrix selection device, for selecting the second pre-coding matrix according to channel state information in short-term, for from Wave beam is selected in given basic beam subset.

24. equipment described in any claim in 9-23 according to claim 1, further includes:

Cluster indexes (CI) selection device, for selecting cluster to index CI by one of following operation:

The first CI and the 2nd CI is selected respectively, so that the cluster of the first CI instruction includes the selected most matched basic wave beam First pre-coding matrix associated by subset or the most matched basic beam subset, and the cluster of the 2nd CI instruction includes First associated by the selected least matched basic beam subset or the least matched basic beam subset Pre-coding matrix.

25. equipment according to claim 24, further includes:

Feedback device, for the selected pre-coding matrix index and cluster index at least to be fed back to base station.

26. a kind of controlling equipment for MIMO transmission system, including,

User selection device indexes CI for the channel quality based in part on user feedback and the cluster of user feedback, Select the primary user to be dispatched, and the determining pairing user being scheduled simultaneously with the primary user；And；

Dispatching device, for when determining there are in the case where the pairing user, based in part on the user feedback Channel quality, the first pre-coding matrix and the CI dispatch the primary user simultaneously on same running time-frequency resource and described match To user；

27. equipment according to claim 26, wherein the user selection device by the CI that feeds back other users with The CI of primary user's feedback is compared to determine the pairing user, wherein the other users and primary user feedback CI be that one of following operation selection is passed through by the other users and the primary user respectively:

28. equipment according to claim 26, wherein the complete or collected works of the basic wave beam are arranged to uniform planar array Form, wherein with the wave beam angle of declination having the same of a line and the wave beam azimuth having the same of same row；And

29. equipment according to claim 26, wherein the complete or collected works of the basic wave beam, the multiple basic beam subset and At least one in the multiple first pre-coding matrix is predetermined, or comes from net at least partially through receiving The instruction of network node and determination.

30. equipment according to claim 26, wherein the multiple first pre-coding matrix passes through Each first pre-coding matrix is associated with one of them of multiple basic beam subsets,