WO2011035481A1 - 预编码矩阵码书生成方法和装置 - Google Patents
预编码矩阵码书生成方法和装置 Download PDFInfo
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- WO2011035481A1 WO2011035481A1 PCT/CN2009/074241 CN2009074241W WO2011035481A1 WO 2011035481 A1 WO2011035481 A1 WO 2011035481A1 CN 2009074241 W CN2009074241 W CN 2009074241W WO 2011035481 A1 WO2011035481 A1 WO 2011035481A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
- H04L25/03898—Spatial equalizers codebook-based design
Definitions
- This invention relates generally to wireless communication systems and, more particularly, to a method and apparatus for generating a precoding matrix codebook for a multi-antenna communication system. Background technique
- GSM Global System for Mobile Communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rate GSM Evolution
- WCDMA Wideband Code Division Multiple Access
- CDMA2000 Code Division Multiple Access 2000
- WLAN wireless local area network
- WiMAX microwave access global interoperability
- Multi-input multiple-output (MIMO) multi-antenna systems can support parallel data stream transmission, thus greatly increasing system throughput, and have become a highly regarded technology in academic research and practical systems.
- parallel data streams in multi-antenna transmission are first encoded with independent forward error correction codes, and then the encoded codewords are mapped onto one or more transport layers.
- the serial data output by the encoder is serially converted into a corresponding plurality of transport layers.
- the number of layers of all transport layers supported by the system is also called the rank of the system.
- the number of layers or rank of the transport layer supported by the multi-antenna system is less than or equal to the number of physical antennas of the multi-antenna system.
- the process of converting the data of each transport layer into data on each physical antenna is called a precoding process of the signal.
- the process of converting the data of each transport layer into data on each physical antenna by a linear operation is called a linear precoding process of the signal.
- current wireless communication systems such as LTE systems and WiMax systems, limited by the computational complexity of the system and the complexity of signaling control, it is necessary to design a certain number of precoding matrices for the system in advance.
- the set of precoding matrices is called a precoding matrix codebook, and the number of precoding matrices in the precoding matrix codebook is called precoding matrices.
- the size of the code book In a multi-antenna system, the precoding matrix codebook, including the size of the precoding matrix codebook and the elements of the precoding matrix codebook, directly affect the system throughput and other indicators. Therefore, in order to improve the performance of the system (for example, to maximize the throughput), it is necessary to carefully design the precoding matrix codebook of the multi-antenna system, including the size of the precoding matrix codebook and each precoding matrix element in the precoding matrix codebook. .
- the precoding matrix codebook is composed of one or more precoding matrices. Therefore, when designing a precoding matrix codebook and a precoding matrix codebook group, it is generally necessary to first know the complete set of precoding matrices in order to select a precoding matrix for generating a precoding matrix codebook and a precoding matrix codebook group. There are various prior art techniques to achieve a complete set of precoding matrices that meet design criteria.
- Each precoding matrix in the precoding matrix ensemble may have the following form: [1, 1, ... 1; ⁇ ,
- precoding matrix ensembles may also be used to provide precoding matrices for generating precoding matrix codebooks and precoding matrix codebook groups.
- the following takes a 4-antenna system as an example to illustrate the composition of the pre-coding matrix ensemble.
- the number of layers supported by the system can be 1, 2, 3, 4, that is, the rank can be 1, 2, 3, 4.
- the form of the precoding matrix p is [l; X11 ; x 21 ; x 31 ].
- the full set of precoding matrices may be formed from one or more of the following precoding matrices that satisfy the form.
- each precoding matrix corresponds to each column of the DFT matrix.
- x u , x 21 , and x 31 may be QPSK constellation points, 8PSK constellation points, 16PSK constellation points, or higher-dimensional PSK constellation points.
- there may be other forms of precoding matrices of Rank l.
- the form of the precoding matrix p is [1 1 ; ⁇ 11 ⁇ 12; ⁇ 21 ⁇ 22; ⁇ 31 ⁇ 32 ].
- the full set of precoding matrices may be formed from one or more of the following precoding matrices that satisfy the form.
- each precoding matrix corresponds to two columns selected in the Hadamard matrix
- x u x 12 x 21 x 22 x 31 x 32 may be a QPSK constellation point, an 8PSK constellation point, a 16PSK constellation point, or a higher dimensional PSK constellation point.
- the process of forming the pre-coding matrix ensemble is similar to that of the above-described 4-antenna system, and will not be described here.
- CMP preserving Cubic Metric Preserving
- CMF Cubic Metric Friendly
- the inventors have found that a generally conceivable method is to extract a predetermined number of the best precoding matrices from the CMP-type precoding matrix ensemble and to integrate the precoding matrices from the CMF scheme.
- the method of combining the best predetermined number of precoding matrices to form a codebook often fails to obtain an optimized codebook.
- the inventors have found that this is at least because of the predetermined number of best precoding matrices taken from the CMP-mode precoding matrix ensemble and the best predetermined number of precoding matrices taken from the CMF mode precoding matrix ensemble. There may be overlaps or inability to optimally match, so that the codebooks formed are not optimized.
- Embodiments of the present invention have been made in view of the above problems of the prior art, and to provide at least one advantageous option for eliminating or alleviating one or more problems of the prior art.
- the present invention provides the following aspects.
- a method for generating a precoding matrix codebook comprising the following steps:
- the second predetermined number of precoding matrices of the second mode are selected from the entire set of precoding matrices of the second mode, including:
- Aspect 3 The method for generating a precoding matrix codebook according to aspect 2, wherein the second mode precoding matrix corresponding to the performance of the communication system having the smallest contribution to the performance of the communication system is correspondingly subtracted The row, and the second predetermined number of second precoding matrices that contribute the greatest amount are selected.
- Aspect 4 The method for generating a precoding matrix codebook according to aspect 2, wherein: a basis of a row corresponding to the first predetermined number of precoding matrices of the first mode in the performance parameter matrix In the above, the row corresponding to the second mode precoding matrix having the largest contribution to the performance of the communication system is increased, and the second predetermined number of the second mode precoding matrix having the largest contribution is selected.
- Aspect 5 The precoding matrix codebook generation method according to aspect 3, characterized in that the second predetermined number of second precoding matrices that contribute the most are selected by the following processing:
- the new performance parameter matrix is set as the current performance parameter matrix, and the processes from (1) are repeated.
- Aspect 6 The method for generating a precoding matrix codebook according to aspect 1, wherein the second predetermined number of precoding matrices of the second mode are selected from the precoding matrix set of the second mode by the following process :
- the number of precoding matrices in the currently selected precoding matrix set is a sum of a first predetermined number and a second predetermined number
- Each row of the performance parameter matrix corresponding to the precoding matrix is selected as an alternative performance parameter matrix, and has an M2 row.
- a precoding matrix codebook generating apparatus wherein the precoding matrix codebook generating apparatus comprises:
- a first precoding matrix corpus acquisition unit configured to obtain a complete set of the precoding matrix of the first mode
- a second precoding matrix corpus acquisition unit configured to obtain a complete set of the precoding matrix of the second mode
- a unit configured to select a first predetermined number of precoding matrices of the first mode in the entire set of pre-compiled matrices of the first manner
- a second precoding matrix selecting unit configured to perform, according to the selected first predetermined number of first a precoding matrix of the mode, selecting a second predetermined number of precoding matrices of the second mode from the precoding matrix of the second mode.
- the precoding matrix codebook generating apparatus wherein the second precoding matrix selecting unit comprises:
- a precoding matrix combination set generating subunit configured to combine the selected first predetermined number of the first mode precoding matrix and the second mode precoding matrix to form a precoding matrix combination set;
- a channel matrix set obtaining subunit configured to obtain a channel matrix set of a communication system to which the precoding matrix is to be applied, each channel matrix corresponding to one channel instance;
- a performance parameter matrix generation subunit configured to form a performance parameter matrix according to the precoding matrix combination set and the channel matrix set, where each row of the performance parameter matrix represents a value of a performance parameter related to the same precoding matrix, a list of values representing performance parameters associated with the same channel matrix;
- a second mode precoding matrix selecting subunit configured to use the performance parameter matrix to select a second predetermined number of seconds that contribute the most according to the contribution of the precoding matrix of each of the second modes to the performance of the communication system The precoding matrix of the way.
- Aspect 10 The precoding matrix codebook generating apparatus according to aspect 9, wherein the second mode precoding matrix selecting subunit subtracts the contribution from the performance parameter matrix to the performance of the communication system by one by one a minimum second mode precoding matrix corresponding row, and selecting a second predetermined number of second precoding matrices that contribute the most, or by using the first predetermined number of the performance parameter matrices Based on the row corresponding to the precoding matrix of one mode, the row corresponding to the second mode precoding matrix having the largest contribution to the performance of the communication system is added one by one, and the second predetermined number of the second having the largest contribution is selected.
- the precoding matrix of the way wherein the second mode precoding matrix selecting subunit subtracts the contribution from the performance parameter matrix to the performance of the communication system by one by one a minimum second mode precoding matrix corresponding row, and selecting a second predetermined number of second precoding matrices that contribute the most, or by using the first predetermined number of the performance parameter matrices Based on the row corresponding to the precoding
- Aspect 11 The precoding matrix codebook generating apparatus according to aspect 9, wherein the precoding matrix codebook generating apparatus further comprises a power normalization unit, configured to perform the second precoding matrix ensemble and The second precoding matrix ensemble performs power normalization.
- FIG. 1 schematically shows a method of generating a precoding matrix codebook according to an embodiment of the present invention.
- FIG. 2 illustrates a method of selecting a first predetermined number of precoding matrices from a first set of precoding matrices in accordance with an embodiment of the present invention.
- FIG. 3 shows a flow chart of a performance parameter matrix generation step in accordance with an embodiment of the present invention.
- 4 schematically illustrates selecting a second predetermined number from the entire set of second precoding matrices according to a selected first predetermined number of first precoding matrices in accordance with an embodiment of the present invention. A preferred method of the second precoding matrix.
- Figure 5 is a flow chart showing the selection of a second predetermined number of precoding matrices of the second mode from a precoding matrix combination set in a matrix subtraction mode in accordance with an embodiment of the present invention.
- FIG. 6 is a flow chart showing a second predetermined number of precoding matrices of a second mode selected from a precoding matrix combination set in a matrix addition manner, in accordance with an embodiment of the present invention.
- FIG. 7 and 8 illustrate a method of selecting a first predetermined number of precoding matrices from a first set of precoding matrices in accordance with two other embodiments of the present invention.
- Fig. 9 is a view schematically showing a precoding matrix codebook generating device in accordance with an embodiment of the present invention.
- FIG. 10 is a block diagram showing the structure of a first mode precoding matrix selecting unit according to an embodiment of the present invention.
- Fig. 11 shows a schematic block diagram of a performance parameter matrix generating unit according to an embodiment of the present invention.
- Fig. 12 shows a schematic block diagram of a precoding matrix selecting unit according to an embodiment of the present invention.
- FIG. 13 and 14 show schematic block diagrams of a first mode precoding matrix selection unit in accordance with further embodiments of the present invention.
- Figure 15 is a block diagram showing the structure of a second mode precoding matrix selecting unit according to an embodiment of the present invention.
- Figure 16 is a block diagram showing the composition of a second precoding matrix selection subunit according to an embodiment of the present invention.
- Figure 17 shows a schematic block diagram of a computer that can be used to implement a method and apparatus in accordance with an embodiment of the present invention. detailed description
- the embodiment of the present invention describes the present invention by taking the cooperation of a precoding matrix (first precoding matrix) of a CMF scheme and a precoding matrix (second precoding matrix) of a CMP scheme as an example.
- first precoding matrix a precoding matrix
- second precoding matrix a precoding matrix of a CMP scheme
- this is not a limitation of the embodiments of the present invention, and that the embodiments of the present invention are also applicable to the mutual cooperation of any two or more forms of precoding matrices.
- the hadamard matrix vector and the DFT matrix vector cooperate, the precoding matrix of the CMP method and the precoding matrix of the CMF mode, and the cooperation of two of the above four methods.
- Fig. 1 schematically shows a method of generating a precoding matrix codebook in accordance with an embodiment of the present invention.
- step S10 a complete set of a first precoding matrix is generated.
- the method of generating the first set of precoding matrices may employ the methods described in the background of the present application as well as various methods in the prior art known to those skilled in the art or conceived in the future.
- the CMF precoding matrix is taken as an example of the first precoding matrix, and thus in the case of 4 antennas, in step S10, a complete ensemble of the first precoding matrix including 192 CMF precoding matrices is generated,
- the first precoding matrix ensemble includes M1 precoding matrices, and M1 is a positive integer.
- step S20 a complete set of the second precoding matrix is generated.
- the method of generating the second precoding matrix ensemble may employ the methods described in the background of the present application as well as various methods in the prior art or later conceived by those skilled in the art.
- the CMP precoding matrix is taken as an example of the second precoding matrix here, and thus in the case of 4 antennas, in step S20, a second precoding matrix ensemble including 24 CMP precoding matrices is generated.
- the second precoding matrix ensemble includes M2 precoding matrices, and M2 is a positive integer.
- a first predetermined number of first precoding matrices are selected from the entire set of first precoding matrices.
- the first predetermined number is ten.
- the first predetermined number is K, and K is a positive integer.
- step S40 selecting, by using the selected first predetermined number of first precoding matrices, a second predetermined number of second precoding matrices from the entire set of the second precoding matrices, and The first predetermined number of first precoding matrices collectively form a precoding matrix codebook.
- a second predetermined number is P herein, and P is a positive integer.
- the selected first predetermined number of first precoding matrices and the full set of second precoding matrices are combined to form a precoding matrix combination set.
- the precoding matrix combining set includes, for example, 34 precoding matrices.
- selecting, from the precoding matrix combination set, a predetermined number of precoding matrices including the first predetermined number of first precoding matrices for example, fetching 16 precoding matrices, and composing the 16 precoding matrices into codes
- the book thus implements the cooperation of the first precoding matrix and the second precoding matrix.
- the selected first predetermined number of first precoding matrices are used to merge from the second precoding matrix by combining with the first precoding matrix.
- a second predetermined number eg, six of second precoding matrices.
- the CMF precoding matrix is taken as an example of the first precoding matrix
- the CMP precoding matrix is taken as an example of the second precoding matrix
- the CMP precoding matrix can be taken as an example of the first precoding matrix
- the CMF precoding matrix is taken as an example of the second precoding matrix.
- the above first predetermined number and second predetermined number of values may be determined empirically. The selection may also be performed in an order of a large to small order or a small to large order of the selectable numbers.
- the above numbers 6, 16, and 10 are just exemplary of.
- step S10 and S20 can be performed in parallel.
- step S30 can be performed before step S20.
- a first predetermined number of first precoding matrices are selected from the entire set of first precoding matrices in step S30 and a first predetermined number of first precoding matrices selected in step S40 are utilized.
- a second predetermined number of second precoding matrices from the entire set of second precoding matrices, and various methods known in the art may be employed. A preferred method of implementing steps S30 and S40 is described below.
- FIG. 2 illustrates a method of selecting a first predetermined number of precoding matrices from a first set of precoding matrices in accordance with an embodiment of the present invention.
- a channel matrix set of a communication system to which a codebook is applied is first generated, and then a performance parameter matrix is generated based on a channel matrix set and a precoding matrix ensemble, and then based on a performance parameter matrix.
- a predetermined number of precoding matrices are selected from the entire set of precoding matrices.
- a set of channel matrices H [ , 3 ⁇ 4, 3 ⁇ 4, . . . , 3 ⁇ 4] is generated or read (eg, read from memory), where N is an integer greater than one.
- Each channel matrix H n ( l ⁇ n ⁇ N) corresponds to one channel instance. Due to the randomness of the channel, the number of elements N of the generated channel set H should be large enough to reflect the statistical properties of the channel.
- channel matrices can be generated in a variety of ways, which are not described herein.
- the following is an example of transmitting a 4-antenna receiving system with 4 antennas to illustrate several commonly used channel matrix forms.
- each generated channel instance is a 4 row 4 column 4x4 matrix, and the elements of the matrix are mutually uncorrelated signals subject to a complex Gaussian distribution.
- the independent Rayleigh fading channel here is merely exemplary, and channels with other statistical characteristics can be used.
- a performance parameter matrix TP is generated.
- a complete set P of precoding matrices composed of M1 precoding matrices, for example, existing or formed (for example, in the case of the precoding matrix of the first mode above, M1 is 192), Each element in P is P m , Ml and m are positive integers, l ⁇ m ⁇ Ml.
- a generated channel matrix set H consisting of N channel matrices is also utilized. Therefore, in step S120, a performance parameter matrix TP of M1 rows and N columns is generated based on the precoding matrix ensemble and the channel matrix set.
- Each row of the performance parameter matrix TP represents a value of a performance parameter (e.g., throughput) associated with the same precoding matrix, each column representing a value of a performance parameter associated with the same channel matrix, each element representing the location of the element The value of the throughput of the system when the precoding matrix associated with the row in which the element is located is used under the channel instance corresponding to the column-related channel matrix.
- a performance parameter e.g., throughput
- FIG. 3 shows a flow chart of a performance parameter matrix generation step in accordance with an embodiment of the present invention.
- the throughput of the system is taken as an example of performance parameters for convenience of description. It will be apparent to those skilled in the art that other suitable performance parameters, such as mutual information of the system, etc., may be employed as desired.
- a signal-to-noise ratio (SNR) of a system operation using a codebook determined by an embodiment of the present invention is determined.
- the Signal to Interference and Noise Ratio (SINR) can be determined.
- the method of determining the SINR is similar to the method of determining the SNR.
- the SNR of the system operation can be a point such as 0dB, 5dB or 10dB.
- the SNR of the system operation can be a point such as 0dB, 5dB or 10dB.
- step S220 the a posteriori SNR is calculated.
- a posteriori SNR vector corresponding to each precoding matrix in the precoding matrix ensemble P for each channel instance corresponding to each channel matrix in the channel matrix set H to obtain MlxN a posteriori signal to noise Than vector.
- Those skilled in the art can use various existing methods to calculate the a posteriori signal to noise ratio vector. As an example, several methods for calculating the a posteriori signal to noise ratio vector are given below.
- ⁇ m is a column vector whose dimension is equal to the number of columns of the precoding matrix P m .
- decoding methods such as maximum likelihood decoding. Any decoding method will correspond to the decoded posterior SNR vector, which will not be described here.
- step S230 the a posteriori signal to noise ratio vector is converted to the value of the throughput.
- the values of different system throughputs can be calculated according to different definitions or different prior art algorithms.
- the mutual information corresponding to the modulation scheme can be obtained by numerical calculation or by looking up the table, and the mutual information is used to characterize the throughput value of the system. .
- the mutual information of the modulation can be obtained by numerical calculation or by looking up the table, and the mutual information is used to characterize the value of the throughput of the system. .
- the link-level block error rate performance of each coded modulation scheme (MCS) of the known system can be converted into a system.
- the link-level throughput rate performance of each coded modulation scheme (MCS) thereby obtaining the value of the system throughput by means of a look-up table.
- mapping or calculation methods to map or calculate the a posteriori signal to noise ratio vector as the value of the throughput of the system, which will not be described here.
- step S240 all throughput values are arranged into a throughput matrix TP of M1 rows and N columns, wherein each row represents a value of throughput associated with the same precoding matrix, each column representing The value of the throughput associated with the same channel matrix, each element representing the throughput of the system when using a precoding matrix associated with the row in which the element is located under the channel instance corresponding to the channel matrix associated with the column in which the element is located The value of the quantity.
- the calculated a posteriori signal to noise ratio vector may be arranged into such a matrix in step S220, and the value of the system throughput may be directly arranged into a matrix form in step S230, without Step S240 is arranged.
- step S130 based on the performance parameter matrix TP, a predetermined number is obtained from the precoding matrix ensemble according to the contribution of each precoding matrix to the performance parameters of the system. Precoding matrix.
- the greater the contribution to the performance parameters of the system the better the performance is achieved by the system, and vice versa.
- the performance parameter is throughput
- the greater the contribution to throughput the greater the throughput the system is, and vice versa.
- such a precoding matrix is fetched: the contribution of each precoding matrix in the precoding matrix to the performance parameters of the system is that the precoding matrix ensemble contributes the most to the performance parameters of the system. For example, if ⁇ precoding matrices are fetched, the extracted K precoding matrices are the first K precoding matrices that contribute the first largest to the ⁇ th largest to the performance parameters of the system in the precoding matrix ensemble, where K is an integer and 1 ⁇ K ⁇ M1.
- step S130 The following describes how to perform precoding matrix selection based on the performance parameter matrix in step S130. It is assumed that a complete set of precoding matrices with M1 elements is present or formed, each element being P m , Ml and m being positive integers, l ⁇ m ⁇ Ml. And assume that a performance parameter matrix TP of M1 rows and N columns has been generated, where each row represents the value of a performance parameter associated with the same precoding matrix, and each column represents the value of a performance parameter associated with the same channel matrix.
- ⁇ precoding is selected from all precoding matrices in the precoding matrix ensemble by deleting the precoding matrix with small contribution according to the contribution of each precoding matrix to the performance parameter of the system. matrix.
- the first level precoding matrix ordering sub-process is first performed on the performance parameter matrix TP to determine to contribute a first small precoding matrix to the performance parameter of the communication system, and delete the precoding matrix. And then performing a second level precoding matrix ordering sub-process on the performance parameter matrix TP that has contributed the first small precoding matrix to the performance parameters of the communication system to determine a performance parameter contribution to the communication system a second small precoding matrix; and deleting the second smallest precoding matrix that contributes to the performance parameter of the communication system, and so on, determining and deleting the performance parameter contribution to the communication system from the first to the M1 – K small precoding matrix is deleted, and the remaining K precoding matrices are taken as the selected precoding matrix.
- the above operation is defined as the operation of the performance parameter value of the matrix A.
- the first-level pre-coding matrix ordering sub-process includes the following steps:
- the second-level performance parameter matrix ⁇ 2 is subjected to a second-level pre-coding matrix sorting sub-process substantially the same as that of the first-stage pre-coding matrix sorting sub-process to determine a second-lowest precoding for the performance parameter of the system.
- the matrix and obtain the performance parameter matrix of the M1-2 row as the third-level performance parameter matrix ⁇ 3 .
- the second-stage precoding matrix ordering sub-processing is basically the same as the first-level pre-coding matrix sorting sub-processing, except that the second-level performance parameter matrix ⁇ 2 is smaller than the first-level performance parameter matrix.
- One line is slightly different from the number of matrix rows in the number of calculations.
- the third-stage precoding matrix sorting sub-processing is performed to the Ml-K-level pre-coding matrix sorting sub-processing, and the pre-coding matrices that contribute to the performance parameter of the system from the third smallest to the M1-K are respectively determined.
- the K precoding matrices after the M1-K precoding matrices of the first to the smallest M1 - K are contributed to the performance parameters of the communication system are deleted as the selected precoding matrices.
- the contribution of each precoding matrix to the performance parameters of the system may be selected according to the selection.
- a precoding matrix with a large contribution is selected, and K precoding matrices with the largest contribution are selected from all precoding matrices in the precoding matrix ensemble.
- a first-level precoding matrix ordering sub-process is performed on the performance parameter matrix TP to determine a first large precoding matrix that contributes to performance parameters of the communication system, and the precoding is selected.
- a matrix contributing to the deletion of the performance parameters of the pair of communication systems a performance parameter matrix TP of a large precoding matrix sequentially performs a second level precoding matrix ordering sub-process to determine a second largest precoding matrix contributing to performance parameters of the communication system; and selecting the pair The performance parameters of the communication system contribute to the second largest precoding matrix.
- determining and selecting a precoding matrix that contributes a first largest to a Kth largest to performance parameters of the communication system is performed on the performance parameter matrix TP to determine a first large precoding matrix that contributes to performance parameters of the communication system, and the precoding is selected.
- a first predetermined number e.g., K
- the following steps may be employed:
- the performance parameter matrix TPu of one row and N columns can be obtained, where i is an integer and l ⁇ i ⁇ Ml;
- the selected behavior corresponding to the largest one of the M1 performance parameter values is the Xth row in the first-level performance parameter matrix TP (represented as the performance parameter matrix TP 1 ), 1 ⁇ ⁇ ⁇ ⁇ 1 , And determining, by the precoding matrix, the precoding matrix related to the Xth row as a first precoding matrix that contributes to the performance parameter of the system; and selecting the precoding matrix;
- the second-level precoding matrix ordering sub-process is performed on the second-level performance parameter matrix ⁇ 2 .
- the second level precoding matrix ordering sub-processing includes the following steps:
- a performance parameter matrix TP 2l of 2 rows and N columns can be obtained, where i is an integer and l ⁇ i ⁇ Ml-1;
- the pre-coding is determined.
- the precoding matrix associated with the Xth row in the matrix ensemble is the second largest precoding matrix contributing to the performance parameters of the system; (5) deleting the TP matrix row x 2 from the second level performance parameter, to obtain ⁇ M1-2 row column matrix as a third performance parameter level performance parameter matrix ⁇ 3.
- a row associated with the first large precoding matrix contributing to the performance parameters of the system and one row associated with the second largest precoding matrix contributing to the performance parameters of the system are combined to form a performance parameter matrix ⁇ 2 .
- the third-stage precoding matrix sorting sub-processing is performed to the first-level pre-coding matrix sorting sub-processing, and the pre-coding matrices that contribute the third largest to the ⁇ -large to the performance parameters of the system are respectively determined.
- the ith row of the level performance parameter matrix and the K-1 rows deleted before the level processing are combined to form a performance parameter matrix TP Kl of K rows and N columns, where i is an integer and l ⁇ i ⁇ Ml + lK.
- K the first-level sub-process
- the row of the performance parameter matrix TP is not deleted before, so in the step (1), the ith row and the 0 row of the first-level performance parameter matrix TP1 are combined. , forming a performance parameter matrix of 1 row and N columns.
- a predetermined number K of precoding matrix sets can be selected from the M1 precoding matrices of the precoding matrix ensemble as the precoding matrix codebook according to the size contributed to the performance parameters of the system.
- a preferred method of selecting a second predetermined number of second precoding matrices from the entire set of second precoding matrices using the selected first predetermined number of first precoding matrices in step S40 is described below.
- FIG. 4 schematically illustrates selecting a second predetermined number from the entire set of second precoding matrices according to a selected first predetermined number of first precoding matrices in accordance with an embodiment of the present invention. A preferred method of the second precoding matrix.
- a pre-coded matrix combination set is first generated in step S310.
- the selected first predetermined number of first precoding matrices are combined with the second precoding matrix ensemble to generate a precoding matrix combination set.
- the precoding matrix combination set includes 34 Precoding matrix.
- the number of precoding matrices in the precoding matrix combination set is M, and M is a positive integer, which includes K first precoding matrices and M2 second precoding matrices.
- a channel matrix set H [ , 3 ⁇ 4, 3 ⁇ 4, ..., H N ] is generated in step S320, where N is an integer greater than one. Every channel matrix! ⁇ ( l ⁇ n ⁇ N) corresponds to a channel instance.
- each row of the performance parameter matrix TP represents a value of a performance parameter associated with the same precoding matrix in the precoding matrix combination set, each column representing a value of a performance parameter associated with the same channel matrix.
- step S340 the selection of the precoding matrix of the second mode is performed according to the generated performance parameter matrix TP.
- the matrix deletion mode and the matrix addition mode can also be adopted.
- step S340 according to the contribution of the precoding matrix of the second mode in the precoding matrix combination set to the performance parameter of the system, by deleting the precoding matrix with a small contribution, the second mode pre-coding from the precoding matrix combination set P precoding matrices are selected from the coding matrix.
- the first level precoding matrix ordering sub-process is first performed on the performance parameter matrix TP to determine a second coding precoding matrix that contributes the first small to the performance parameter of the communication system, and deletes a row corresponding to the precoding matrix; and then performing a second execution of the performance parameter matrix TP corresponding to the precoding matrix corresponding to the precoding matrix of the second mode that contributes the first small to the performance parameter of the communication system
- Level precoding matrix ordering sub-process to determine a second small precoding matrix that contributes a second smallest to performance parameters of the communication system; and to contribute a second smallest precoding to the performance parameters of the communication system Deleting the row corresponding to the matrix, and so on, determining and deleting the row deletion corresponding to the precoding matrix that contributes to the performance parameter of the communication system from the first smallest to the Mth (M+P), and obtains
- the precoding matrix corresponding to the performance parameter matrix of the K+P row is selected as the selected precoding matrix.
- Figure 5 is a flow diagram showing a second predetermined number of precoding matrices (e.g., P) from a precoding matrix combination set in a matrix subtraction manner in accordance with an embodiment of the present invention.
- precoding matrices e.g., P
- K is the number of precoding matrices from the ensemble of the first precoding matrix in the precoding matrix combination set. Assume that in the performance parameter matrix TP, these K precodings The matrix corresponds to the first to kth rows, respectively.
- step S403 the i-th row of the current performance parameter matrix is deleted, and the performance parameter value of the current performance matrix after deleting the i-th row is calculated in step S404.
- the calculation of the performance parameter values can be as described above.
- step S405 the value of i is increased by one.
- step S406 it is determined whether i is greater than L, that is, whether rows in the performance parameter matrix corresponding to each precoding matrix in the entire precoding matrix of the second precoding matrix have been deleted.
- step S406 If the determination in step S406 is negative, the process returns to step S403.
- step S406 determines whether the determination in step S406 is YES. If the determination in step S406 is YES, the process proceeds to step S407.
- step S407 the deleted row corresponding to the minimum performance parameter value of the performance parameter values calculated above is deleted, and the performance parameter matrix after the row is deleted is used as the current performance parameter matrix.
- step S408 the value of L is decremented by one.
- step S409 it is judged whether L is smaller than M-P-K. This step is to determine if enough precoding matrices have been removed.
- step S409 If the result of the determination in step S409 is negative, then step S402 is returned. Otherwise, if the result of the determination in step S409 is affirmative, then step S410 is performed to select the precoding matrix corresponding to each row of the current performance parameter matrix.
- step S340 according to the contribution of the precoding matrix of the second mode in the precoding matrix combination set to the performance parameter of the system, all the precoding matrixes from the precoding matrix are selected by selecting the precoding matrix with large contributions.
- the precoding matrix of the P second modes that contribute the most is selected in the precoding matrix.
- the first level precoding matrix ordering sub-process is performed on the performance parameter matrix TP to determine a precoding matrix of the second mode that contributes the first largest to the performance parameter of the communication system, and selects Excluding the precoding matrix; and then performing a second level precoding matrix on the performance parameter matrix TP after deleting the row corresponding to the precoding matrix of the second mode that contributes the first largest to the performance parameter of the communication system Sorting sub-processes to determine a second-mode precoding matrix that contributes the second largest to the performance parameters of the communication system; and selecting performance parameters of the pair of communication systems The number contributes to the second largest precoding matrix of the second mode. And so on, determining and selecting a precoding matrix that contributes the first to the largest P to the performance parameters of the communication system.
- Figure 6 is a flow diagram showing a second predetermined number of precoding matrices (e.g., P) selected from a precoding matrix combination set in a matrix addition manner in accordance with an embodiment of the present invention.
- precoding matrices e.g., P
- step S501 a row corresponding to the selected K first mode precoding matrices in the performance parameter matrix TP is set as the currently selected performance parameter matrix, and the performance parameter matrix is used.
- the row corresponding to the precoding matrix of the second mode in the TP is set as the current candidate performance parameter matrix.
- step S503 the i-th row is selected from the current candidate performance matrix, and the additional row is merged with the current selected performance matrix.
- step S504 the performance parameter values of the performance parameter matrix obtained by combining in step S503 are calculated.
- step S505 i is incremented by 1.
- step S506 It is then determined in step S506 whether i is greater than L, where L is the number of rows of the current candidate performance matrix. If i is not greater than L, the process returns to step S503.
- step S507 is entered.
- the added line corresponding to the largest performance parameter value among the L performance parameter values obtained in step S504 is added to the current performance parameter matrix (the matrix obtained at this time is actually the maximum performance parameter value.
- the matrix obtained at this time is actually the maximum performance parameter value.
- the above process selects the precoding matrix that currently contributes the most to system performance.
- step S508 the added row corresponding to the maximum performance parameter value is deleted from the current candidate performance parameter matrix to obtain a new current candidate performance parameter matrix.
- step S509 it is determined whether a sufficient number of precoding matrices should be obtained. For example, it can be determined whether L is smaller than M2—P, where M2 is the number of precoding matrices in the second mode precoding matrix, and P is to be taken out therefrom. The second way to precode the number of matrices. It is also possible to determine whether the currently selected precoding matrix is equal to the sum of the first predetermined number and the second predetermined number.
- step S509 If a sufficient number of precoding matrices have been obtained (step S509, YES), the processing proceeds to step S510, where the precoding matrix corresponding to the currently selected performance parameter matrix is output.
- Step S509 If not enough precoding matrices have been obtained yet (step S509, no), the processing proceeds to Step S502, further selecting a next precoding matrix that contributes the most to system performance.
- step S508 may be performed after step S509, before step S510.
- step S340 can be understood by referring to the above description of S130.
- Steps S720 and S820 correspond to S110
- steps S730 and S830 correspond to S120
- steps S740 and S840 correspond to S130.
- a power normalization step is also included before the performance parameter matrix generation step.
- the power normalization step may be before the channel matrix set generation step, as shown in Fig. 7, or after the channel matrix set generation step, before the performance parameter matrix generation step, as shown in Fig. 8.
- using a diagonal matrix in which the main diagonal elements are not completely equal as the power normalization matrix may also use a diagonal matrix having the same principal diagonal elements as the power normalization matrix. Power normalization is performed on each precoding matrix in the precoding matrix.
- step S310 of Fig. 4 it is also possible to increase the power normalization step after step S310 of Fig. 4 and before step S330.
- This normalization step can be completed before or after the channel matrix set generation step.
- P second precoding matrices that contribute the most to system performance can be extracted as follows.
- the number of precoding matrices in the currently selected precoding matrix set is a sum of a first predetermined number and a second predetermined number
- the increased precoding corresponding to the largest one of the L performance parameter values The matrix is removed from the current set of candidate precoding matrices.
- the processes of (1) are repeated for the set of currently selected precoding matrices.
- Fig. 9 is a view schematically showing a precoding matrix codebook generating device in accordance with an embodiment of the present invention.
- a precoding matrix codebook generating apparatus includes a first precoding matrix corpus obtaining unit 910, a second precoding matrix corpus obtaining unit 920, and a first mode precoding matrix selection.
- the first precoding matrix corpus obtaining unit 910 obtains a complete set of precoding matrices of the first mode, such as a full set of precoding matrices of the CMF scheme, by itself or by external reading.
- the second pre-coding matrix corpus obtaining unit 920 obtains the complete set of the precoding matrix of the second mode by itself or by external reading, such as the complete set of the precoding matrix of the CMP method.
- the first mode precoding matrix selection unit 930 selects a first predetermined number of precoding matrices of the first mode from the ensemble of the precoding matrices of the first mode obtained by the first precoding matrix corpus obtaining unit 910.
- the second mode precoding matrix selecting unit 930 uses the first predetermined number of precoding matrices of the first mode selected by the first mode precoding matrix selecting unit 930, and the second mode obtained by the second precoding matrix corpus obtaining unit 920. A second predetermined number of precoding matrices of the second mode are selected in the entire set of precoding matrices.
- FIG. 10 is a schematic structural diagram of a first mode precoding matrix selecting unit according to an embodiment of the present invention.
- the first mode precoding matrix selecting unit includes a channel matrix set The acquisition subunit 1010, the performance parameter matrix generation unit sub 1020, and the first precoding matrix selection subunit 1030.
- Each channel matrix H n ( l ⁇ n ⁇ N) corresponds to one channel instance. Due to the randomness of the channel, the number of elements N of the generated or read channel set H should be large enough to reflect the statistical properties of the channel.
- the performance parameter matrix generating unit 1020 is configured to generate performance parameters of the M1 row and N columns based on the complete set of the precoding matrix of the first mode and the channel matrix set composed of the M1 precoding matrices.
- a matrix TP where Ml is a positive integer.
- Each row of the performance parameter matrix TP represents the value of a performance parameter associated with the same precoding matrix, with each column representing the value of a performance parameter associated with the same channel matrix.
- the precoding matrix selecting unit 1030 is configured to select, according to the performance parameter matrix TP, from all the precoding matrices in the precoding matrix ensemble according to the contribution size of each precoding matrix to the performance parameter of the communication system. A first predetermined number of precoding matrices that contribute the most to system performance.
- Fig. 11 shows a schematic block diagram of a performance parameter matrix generating unit according to an embodiment of the present invention.
- the performance parameter matrix generating unit 1020 includes a signal to noise ratio determining unit 1110, a posterior signal to noise ratio vector calculating unit 1120, and a throughput matrix generating unit 1130.
- the signal to noise ratio determining unit 1110 is configured to determine a signal to noise ratio of the communication system.
- the a posteriori signal to noise ratio vector calculation unit 1120 is configured to calculate the first precoding matrix for a channel instance corresponding to each channel matrix in the channel matrix set based on the signal to noise ratio.
- the posterior signal-to-noise ratio vector of the communication system corresponding to each precoding matrix in the ensemble obtains MxN a posteriori SNR vectors.
- the throughput matrix generation unit 1130 is configured to convert the a posteriori signal to noise ratio vector into a value of the throughput of the communication system, and arrange all the values of the throughput into M1 rows and N columns.
- a throughput matrix TP where each row represents a value of throughput associated with the same precoding matrix, each column representing a value of throughput associated with the same channel matrix, each element representing a channel matrix associated with the column in which the element is located.
- FIG. 12 shows a schematic block diagram of a precoding matrix selecting unit according to an embodiment of the present invention. As shown in FIG. 12, the precoding matrix selecting unit 1030 includes a precoding matrix contribution determining subunit 1210 and a precoding matrix arranging subunit 1220.
- the precoding matrix contribution determining subunit 1210 is configured to perform a first level precoding matrix ordering sub-process on the performance parameter matrix TP to determine a contribution to performance parameters of the communication system. a small precoding matrix, and sequentially performing second stage to Ml -K stage precoding matrix ordering sub-processes to respectively determine Ml - a small contribution to the performance parameter of the communication system to a small Ml-K - K precoding matrices.
- the precoding matrix arrangement sub-unit 1220 is configured to determine the first predetermined number of first modes of precoding according to the M1-K precoding matrices determined by the precoding matrix contribution determining subunit 1210. matrix.
- precoding matrix arrangement sub-unit 1220 and the precoding matrix contribution determination sub-unit 1210 can be referred to the previous description of the matrix deletion method.
- the precoding matrix contribution determining subunit 1210 is configured to perform a first level precoding matrix ordering sub-process on the performance parameter matrix TP to determine a performance parameter contribution to the communication system. a first large precoding matrix, and sequentially performing second level to kth precoding matrix ordering sub-processes to respectively determine K precoding matrices that contribute the second largest to the Kth largest for performance parameters of the communication system .
- the precoding matrix arrangement sub-unit 1220 is configured to select K precoding matrices based on the contribution of the precoding matrix to the performance parameters of the communication system.
- FIG. 13 and 14 show schematic block diagrams of a first mode precoding matrix selecting unit according to another embodiment of the present invention.
- the first mode precoding matrix selecting unit shown in Figs. 13 and 14 further includes a power normalization unit 1310 and a power normalization unit 1420, respectively, as compared with the first mode precoding matrix selecting unit shown in Fig. 10.
- the power normalization unit 1310 and the power normalization unit 1420 have the same function.
- the power normalization units 1310 and 1420 are configured to use a diagonal matrix in which the main diagonal elements are not completely equal as a power normalization matrix, or a pair of equal main diagonal lines may be used.
- the angular matrix is used as a power normalization matrix, and each precoding matrix in the entire set of precoding matrices is power normalized.
- the difference between the power normalization unit 1310 and the power normalization unit 1420 is that, in FIG. 13, the power normalization unit 1310 is connected before the channel matrix set generation unit 1320. That is, the power normalization unit 1310 performs power normalization on the precoding matrix in the precoding matrix ensemble before generating the channel matrix set.
- the power normalization unit 1420 is connected after the channel matrix set generation unit 1410, before the performance parameter matrix generation unit 1430. That is, the power normalization unit 1420 performs power normalization on the precoding matrix in the precoding matrix full set before generating the performance parameter matrix after generating the channel matrix set.
- Figure 15 is a block diagram showing the structure of a second mode precoding matrix selecting unit according to an embodiment of the present invention.
- the second mode precoding matrix selecting unit includes a precoding matrix combining set generating subunit 1510, a channel matrix set obtaining subunit 1520, a performance parameter matrix generating subunit 1530, and a second precoding matrix selecting subunit 1540. .
- the precoding matrix combination set generation subunit 1510 combines the selected first predetermined number of first precoding matrices with the second precoding matrix ensemble to generate a precoding matrix combination set. For example, when the number of the first precoding matrices selected in the entire set of the first (CMF) precoding matrices is 10 and the second precoding matrices are CMP precoding matrices, in the case of 4 antennas, The precoding matrix combination set contains 34 precoding matrices.
- the performance parameter matrix generation subunit 1530 generates a performance parameter matrix TP of M rows and N columns based on the precoding matrix combination set and the channel matrix set. Each row of the performance parameter matrix TP represents the value of a performance parameter associated with the same precoding matrix in the precoding matrix combination set, and each column represents the value of the performance parameter associated with the same channel matrix. Specific steps for generating the performance parameter matrix TP can be found in the above description.
- the second precoding matrix selecting subunit 1540 performs selection of the precoding matrix according to the generated performance parameter matrix TP, and selects a second predetermined number of precoding matrices of the second mode.
- Figure 16 is a diagram showing the composition of a second precoding matrix selection subunit 1540 in accordance with an embodiment of the present invention.
- the second precoding matrix selection subunit 1540 includes a second mode precoding matrix contribution determining subunit 1610 and a second mode precoding matrix selecting subunit 1620.
- the second mode precoding matrix contribution determining subunit 1610 is configured to perform a first level precoding matrix ordering sub-process on the performance parameter matrix TP to determine performance of the communication system.
- the parameter contributes a first small second mode precoding matrix, and sequentially performs a second level to an M2-P level precoding matrix ordering sub-process to respectively determine a contribution to the performance parameter of the communication system from the second smallest to the M2 – P small second mode precoding matrix.
- the second mode precoding matrix selecting subunit 1620 deletes the M2-P second mode precoding matrices from the entire set of the second mode precoding matrix, thereby obtaining P second mode precoding matrices to be selected.
- the second precoding matrix contribution determining subunit 1610 is configured to perform a first level precoding matrix ordering sub-process on the performance parameter matrix TP to determine performance parameters for the communication system. Contributing to the first large second mode precoding matrix, and sequentially performing the second level to the Pth stage precoding matrix ordering sub-process to respectively determine the second largest to the Pth largest contribution to the performance parameter of the communication system Two-way precoding matrix.
- the second mode precoding matrix selection subunit 1620 determines the P second mode precoding matrices as the P second mode precoding matrices to be selected.
- Each of the constituent modules, units, and subunits in the above apparatus may be configured by software, firmware, hardware, or a combination thereof.
- the specific means or manner in which the configuration can be used is well known to those skilled in the art and will not be described herein.
- a program constituting the software is installed from a storage medium or a network to a computer having a dedicated hardware structure (for example, a general-purpose computer shown in FIG. 17), which can be installed with various programs. Perform various functions and so on.
- Figure 17 shows a schematic block diagram of a computer that can be used to implement a method and apparatus in accordance with an embodiment of the present invention.
- a central processing unit (CPU) 1701 executes various processes in accordance with a program stored in a read only memory (ROM) 1702 or a program loaded from a storage portion 1708 to a random access memory (RAM) 1703.
- ROM read only memory
- RAM random access memory
- data required when the CPU 1701 executes various processes and the like is also stored as needed.
- the CPU 1701, the ROM 1702, and the RAM 1703 are connected to each other via a bus 1704.
- Input/output interface 1705 is also coupled to bus 1704.
- the following components are connected to the input/output interface 1705: Input section 1706 (including keyboard, mouse) And so on), an output portion 1707 (including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.), a storage portion 1708 (including a hard disk, etc.), a communication portion 1709 (including a network interface card such as a LAN) Card, modem, etc.).
- the communication section 1709 performs communication processing via a network such as the Internet.
- the driver 1710 can also be connected to the input/output interface 1705 as needed.
- a removable medium 1711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like can be mounted on the drive 1710 as needed, so that the computer program read therefrom is installed into the storage portion 1708 as needed.
- a program constituting the software is installed from a network such as the Internet or a storage medium such as the detachable medium 1711.
- a storage medium is not limited to the removable medium 1711 shown in Fig. 17 in which a program is stored and distributed separately from the device to provide a program to the user.
- the detachable medium 1711 include a magnetic disk (including a floppy disk (registered trademark: , a compact disk (including a compact disk read only memory (CD-ROM)), a digital versatile disk (DVD), a magneto-optical disk (including a mini disk (MD) (registered trademark), and
- the storage medium may be a ROM 1702, a hard disk included in the storage portion 1708, or the like, in which programs are stored, and distributed to the user together with the device containing them.
- the present invention also provides a program product for storing a machine readable instruction code.
- the instruction code is read and executed by a machine, the above-described method according to an embodiment of the present invention can be performed.
- a storage medium for carrying a program product storing the above-described storage machine readable instruction code is also included in the disclosure of the present invention.
- the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
- the first predetermined number of precoding matrices of the CMF mode are taken out from the ensemble matrix of the CMF mode, and the second predetermined number of precoding matrices of the CMP mode are taken out from the CMP mode precoding matrix ensemble.
- the extracted precoding matrix constitutes a precoding matrix codebook.
- Table 1 shows that the number of supported transmission layers (i.e., the rank number) of the multi-antenna communication system to be applied to the codebook is 3, and the structure is the pre-coding matrix complete set P eMF of the CMF scheme.
- the power normalization of the precoding matrix ensemble shown in Table 1 is performed using the following power normalization matrix, where equal power is required for each transport layer:
- Table 1 1 - 192 indicates the sequence number of the precoding matrix, and each precoding matrix is 4 rows and 3 columns.
- Table 2 shows that the number of supported transmission layers (i.e., the rank number) of the multi-antenna communication system is 3, and the structure is a CMP-based precoding matrix corpus PCMP.
- the numbers 1 through 24 in Table 2 indicate the numbers of the precoding matrices, and each precoding matrix is 4 rows and 3 columns.
- the following precoding matrix codebook can be obtained by using 2x10 5 channel instances.
- the precoding matrix codebook is composed of 10 CMF precoding matrices and 10 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 12 CMF precoding matrices and 8 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 13 CMF precoding matrices and 7 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 14 CMF precoding matrices and 6 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook consists of 15 CMF precoding matrices and 5 CMP pre-preparations
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 16 CMF precoding matrices and 4 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 17 CMF precoding matrices and 3 CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 18 CMF precoding matrices and two CMP precoding matrices
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 19 CMF precoding matrices and one CMP precoding matrix
- the CMF precoding matrix is:
- the CMP precoding matrix is:
- the precoding matrix codebook is composed of 20 CMF precoding matrices
- the CMF precoding matrix is:
- the precoding matrix codebook is composed of 20 CMP precoding matrices
- the CMP precoding matrix is:
- the method of the present invention is not limited to being performed in the chronological order described in the specification, and may be performed in other chronological order, in parallel or independently. Therefore, the order of execution of the methods described in the specification does not limit the technical scope of the present invention.
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PCT/CN2009/074241 WO2011035481A1 (zh) | 2009-09-25 | 2009-09-25 | 预编码矩阵码书生成方法和装置 |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101647377B1 (ko) * | 2009-05-22 | 2016-08-10 | 엘지전자 주식회사 | 무선 통신 시스템에서 안테나 전송 전력에 따른 적응적인 다중 안테나 전송 방법 및 장치 |
JP5149257B2 (ja) * | 2009-10-02 | 2013-02-20 | シャープ株式会社 | 無線通信システム、通信装置および無線通信方法 |
WO2012107561A1 (en) | 2011-02-10 | 2012-08-16 | Dolby International Ab | Spatial adaptation in multi-microphone sound capture |
CN102761354B (zh) * | 2011-04-28 | 2015-02-18 | 上海贝尔股份有限公司 | 在网络设备中生成码本和相关数据的方法及装置 |
US9425929B2 (en) * | 2014-06-26 | 2016-08-23 | Alcatel Lucent | Wireless communication with suppression of inter-cell interference in large-scale antenna systems |
WO2017090119A1 (ja) * | 2015-11-25 | 2017-06-01 | 株式会社日立国際電気 | 無線通信システム及び受信装置 |
CN112880556B (zh) * | 2021-01-06 | 2022-04-22 | 南京林业大学 | 一种地基三维激光扫描的林分标准地样木位置的确定方法 |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080080449A1 (en) | 2006-09-28 | 2008-04-03 | Kaibin Huang | Generalized codebook design method for limited feedback systems |
EP1919097A1 (en) | 2006-10-30 | 2008-05-07 | NTT DoCoMo Inc. | Codebook generator, codebook and method for generating update matrices to be used in a precoding scheme with MIMO transmission |
US20080165876A1 (en) | 2007-01-08 | 2008-07-10 | Samsung Electronics Co, Ltd. | Apparatus for generating precoding codebook for mimo system and method using the apparatus |
WO2008086239A1 (en) | 2007-01-04 | 2008-07-17 | Texas Instruments Incorporated | Precoding codebook for mimo systems |
WO2008097035A1 (en) | 2007-02-06 | 2008-08-14 | Samsung Electronics Co., Ltd. | Codebook generating method and apparatus for generating a codebook for multi-polarized multiple-input multiple-output (mimo) systems |
WO2008098225A2 (en) * | 2007-02-09 | 2008-08-14 | Qualcomm Incorporated | Mimo transmission with rank-dependent precoding |
CN101286824A (zh) * | 2008-01-24 | 2008-10-15 | 北京邮电大学 | 在多用户终端mimo系统中预编码方法和系统 |
WO2008137523A1 (en) | 2007-05-01 | 2008-11-13 | Nec Laboratories America, Inc. | A codebook method for multiple input multiple output wireless system |
US20080292013A1 (en) | 2007-05-23 | 2008-11-27 | Texas Instruments Incorporated | Nested precoding codebook structures for mimo systems |
US20080303699A1 (en) | 2007-06-08 | 2008-12-11 | Jianzhong Zhang | MIMO wireless precoding system robust to power imbalance |
US20080316910A1 (en) | 2007-06-22 | 2008-12-25 | Alexei Ashikhmin | Complex vector quantization codebook for use in downlink multi-user MIMO mobile broadcast systems |
US20090006518A1 (en) | 2007-06-26 | 2009-01-01 | Rensburg Cornelius Van | Simple MIMO precoding codebook design for a MIMO wireless communications system |
CN101485103A (zh) * | 2007-08-31 | 2009-07-15 | 富士通株式会社 | 无线通信系统和无线通信方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7949318B2 (en) * | 2007-02-05 | 2011-05-24 | Nec Laboratories America, Inc. | Multi-rank beamforming precoding apparatus and method |
TWI470957B (zh) * | 2006-10-30 | 2015-01-21 | Interdigital Tech Corp | 無線通信系統中處理反饋方法及裝置 |
KR101285595B1 (ko) * | 2007-03-16 | 2013-07-15 | 퍼듀 리서치 파운데이션 | 다중 입출력 시스템을 위한 프리코딩 행렬 코드북 생성장치 및 그 방법 |
KR100913940B1 (ko) * | 2008-04-25 | 2009-08-26 | 삼성전자주식회사 | 적응적으로 코드북을 변경하거나 업데이트하는 다중 안테나 통신 시스템 |
CN103152090B (zh) * | 2009-08-07 | 2015-12-02 | 华为技术有限公司 | 预编码处理方法、码本集合及基站 |
-
2009
- 2009-09-25 KR KR1020127009188A patent/KR20120054089A/ko active IP Right Grant
- 2009-09-25 EP EP09849669.8A patent/EP2482470A4/en not_active Withdrawn
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Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080080449A1 (en) | 2006-09-28 | 2008-04-03 | Kaibin Huang | Generalized codebook design method for limited feedback systems |
EP1919097A1 (en) | 2006-10-30 | 2008-05-07 | NTT DoCoMo Inc. | Codebook generator, codebook and method for generating update matrices to be used in a precoding scheme with MIMO transmission |
WO2008086239A1 (en) | 2007-01-04 | 2008-07-17 | Texas Instruments Incorporated | Precoding codebook for mimo systems |
US20080165876A1 (en) | 2007-01-08 | 2008-07-10 | Samsung Electronics Co, Ltd. | Apparatus for generating precoding codebook for mimo system and method using the apparatus |
WO2008097035A1 (en) | 2007-02-06 | 2008-08-14 | Samsung Electronics Co., Ltd. | Codebook generating method and apparatus for generating a codebook for multi-polarized multiple-input multiple-output (mimo) systems |
WO2008098225A2 (en) * | 2007-02-09 | 2008-08-14 | Qualcomm Incorporated | Mimo transmission with rank-dependent precoding |
WO2008137523A1 (en) | 2007-05-01 | 2008-11-13 | Nec Laboratories America, Inc. | A codebook method for multiple input multiple output wireless system |
US20080292013A1 (en) | 2007-05-23 | 2008-11-27 | Texas Instruments Incorporated | Nested precoding codebook structures for mimo systems |
US20080303699A1 (en) | 2007-06-08 | 2008-12-11 | Jianzhong Zhang | MIMO wireless precoding system robust to power imbalance |
US20080316910A1 (en) | 2007-06-22 | 2008-12-25 | Alexei Ashikhmin | Complex vector quantization codebook for use in downlink multi-user MIMO mobile broadcast systems |
US20090006518A1 (en) | 2007-06-26 | 2009-01-01 | Rensburg Cornelius Van | Simple MIMO precoding codebook design for a MIMO wireless communications system |
CN101485103A (zh) * | 2007-08-31 | 2009-07-15 | 富士通株式会社 | 无线通信系统和无线通信方法 |
CN101286824A (zh) * | 2008-01-24 | 2008-10-15 | 北京邮电大学 | 在多用户终端mimo系统中预编码方法和系统 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018039963A1 (zh) * | 2016-08-31 | 2018-03-08 | 华为技术有限公司 | 码本的确定方法、基站和用户设备 |
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JP2013506321A (ja) | 2013-02-21 |
EP2482470A4 (en) | 2015-08-19 |
JP5418685B2 (ja) | 2014-02-19 |
US8553798B2 (en) | 2013-10-08 |
KR20120054089A (ko) | 2012-05-29 |
CN102474324A (zh) | 2012-05-23 |
US20120163496A1 (en) | 2012-06-28 |
EP2482470A1 (en) | 2012-08-01 |
CN102474324B (zh) | 2014-07-16 |
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