WO2014153681A1 - Procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système mimo - Google Patents

Procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système mimo Download PDF

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Publication number
WO2014153681A1
WO2014153681A1 PCT/CN2013/000353 CN2013000353W WO2014153681A1 WO 2014153681 A1 WO2014153681 A1 WO 2014153681A1 CN 2013000353 W CN2013000353 W CN 2013000353W WO 2014153681 A1 WO2014153681 A1 WO 2014153681A1
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WO
WIPO (PCT)
Prior art keywords
matrix
rank
antenna
codeword
polarization direction
Prior art date
Application number
PCT/CN2013/000353
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English (en)
Chinese (zh)
Inventor
武露
刘皓
Original Assignee
阿尔卡特朗讯
上海贝尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 阿尔卡特朗讯, 上海贝尔股份有限公司 filed Critical 阿尔卡特朗讯
Priority to PCT/CN2013/000353 priority Critical patent/WO2014153681A1/fr
Priority to CN201380073341.5A priority patent/CN105075142B/zh
Publication of WO2014153681A1 publication Critical patent/WO2014153681A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side

Definitions

  • Multi-antenna channel codebook feedback method and device in MIMO system Multi-antenna channel codebook feedback method and device in MIMO system
  • the present invention relates generally to mobile communication technologies and, more particularly, to a Multiple User Multiple Input Multiple Output (MU MIMO) transmission technique.
  • MU MIMO Multiple User Multiple Input Multiple Output
  • a method for multi-antenna channel feedback for a multiple input multiple output system including: detecting a downlink multi-antenna channel; determining a rank based on a detection result of the downlink multi-antenna channel, based on a predetermined criterion selects a codeword from a predetermined codebook corresponding to the rank; and feeds back an index of the selected codeword and the rank; wherein any one of the predetermined codebooks is long a product of a first matrix of time-band wideband channel information and a second matrix representing short-term narrowband channel information, the first matrix being a diagonal matrix having a number of rows and columns equal to the number of transmitting antennas, and the number of rows of the second matrix being equal to a transmitting antenna The number, the number of columns is equal to the rank; wherein, the sample set of the first matrix includes a first set and a second set, and any sample in the first set includes two identical discrete Fourier transform forms a semi-long diagonal matrix,
  • an apparatus in a user equipment for a multiple input multiple output system comprising: a detecting module, configured to detect a downlink multi-antenna channel; a determining module, configured to determine a rank according to a detection result of the downlink multi-antenna channel, and select a codeword from a predetermined codebook corresponding to the rank based on a predetermined criterion; a feedback module, configured to feed back an index of the selected codeword and the rank; wherein, any one of the predetermined codebooks is a first matrix indicating long-term broadband channel information and a first-time narrowband channel information a product of a second matrix, wherein the first matrix is a diagonal matrix having a number of rows and columns equal to the number of transmitting antennas, and the number of rows of the second matrix is equal to the number of transmitting antennas, and the number of columns is equal to the rank; wherein, the first matrix
  • the sample set includes a first set and a second set, and any sample in the first set
  • the first set or the second set of the first matrix is an empty set.
  • the downstream multi-antenna uses a cross-polarized linear array.
  • the downlink multi-antenna uses a uniform linear array.
  • the second column of the second matrix is further distinguished from the first column by a differential beam offset factor and a differential phase shift factor.
  • a user equipment for a multiple input multiple output system includes the aforementioned apparatus.
  • Figure 1 illustrates an application scenario in accordance with one embodiment of the present invention
  • FIG. 2 shows a flow chart of a PMI feedback method suitable for a MIMO system according to an embodiment of the present invention.
  • FIG. 3 shows a schematic structural diagram of an apparatus suitable for a MIMO system user equipment according to an embodiment of the present invention. detailed description
  • FIG. 1 shows a schematic diagram of an application scenario according to an embodiment of the present invention.
  • the technical solution of the present invention is suitable for a multiple input multiple output system.
  • the base station device 1 and the user equipment 2 are included in the scenario.
  • the technical solution of the present invention is suitable for, for example, but not limited to, Precoding Matrix Index (PMI) feedback between the base station device 1 and the user equipment 2.
  • PMI Precoding Matrix Index
  • the base station or the base station device referred to herein is, for example but not limited to, the Node B or the evolved Node B (eNB) in the LTE system or the LTE-A system, and the present invention
  • the technical solution is also not limited to the applicable LTE system or the LTE-A system.
  • the method 20 includes steps 22, 24, and 26 performed by the user device 2.
  • the user equipment 2 detects the downlink multi-antenna channel.
  • the multiple antennas of the downlink multi-antenna channel detected by the user equipment 2 are the transmitting antennas of the base station apparatus 1.
  • the number of antennas of the downlink antenna array is usually an even number of 4 or more, such as but not limited to 4, 6, 8, and the like.
  • step 24 the user equipment 2 determines a rank based on the detection result of the downlink multi-antenna channel, and selects one codeword from a predetermined codebook corresponding to the rank based on a predetermined criterion.
  • step 26 user equipment 2 feeds back the index of the selected codeword and the rank.
  • composition of any one of the predetermined codebooks W can be expressed by the following formula
  • the first matrix is a diagonal matrix, representing long-term wideband channel information, the number of rows and columns is equal to the number of transmitting antennas; the second matrix w 2 represents short-term narrowband channel information, the number of rows being equal to the number of transmitting antennas, and the number of columns is equal to rank.
  • the sample set of the first matrix includes a first set and a second set, and any sample in the first set includes two semi-long diagonal matrices in the same discrete Fourier transform form, the second set Any of the samples is a full-length diagonal matrix in the form of a discrete Fourier transform.
  • any of the samples in the sample set of the first matrix can be formulated as follows
  • N represents the number of samples
  • ⁇ ⁇ represents the number of transmitting antennas.
  • the first matrix ⁇ " in this embodiment belongs to the first set, and the corresponding second set is an empty set.
  • any of the samples in the sample set of the first matrix can be formulated as follows
  • the first matrix ⁇ in this embodiment belongs to the second set, and the corresponding first set is an empty set.
  • first set and the second set are both non-empty sets. Any sample in the first set can be expressed as a formula
  • Any sample in the second set can be publicized as
  • the codeword number of the codebook is usually an integer power of two.
  • N is, for example but not limited to, 8, 16, and the like.
  • N is 8, the first matrix Wi can be fed back by using a 3-bit index; when N is 16, the first matrix Wi can be fed back by using a 4-bit index.
  • Each column of the second matrix W 2 includes a first half-length vector corresponding to a first polarization direction and a second half-length vector corresponding to a second polarization direction, the first half-length vector representing relative to the first matrix Beam offset, the second half-length vector representing a beam offset with respect to the first matrix, an inter-polarization beam offset of the second polarization direction with respect to the first polarization direction, and a phase offset.
  • the rank determined by the user equipment 2 is 1, and the second matrix can be expressed by the following
  • the second matrix W 2 includes two half-length vectors respectively corresponding to one polarization direction of the transmitting antenna.
  • the superscript T represents matrix transposition
  • e represents a finer beam offset factor in one polarization direction with respect to long-term feedback
  • e w represents inter-polarization beam offset between two polarization directions
  • the rank determined by the user equipment 2 is 2, and the second column of the second matrix W 2 is further distinguished from the first column by a differential beam offset factor and a differential phase shift factor.
  • the second matrix can be expressed as follows
  • the second matrix W 2 includes two columns, respectively corresponding to two ranks (or two data streams), and the composition of the first column is the same as the formula (6).
  • ⁇ ⁇ .
  • ⁇ , ⁇ ⁇ can be set to multiple values, respectively.
  • the downlink transmission may be performed by one base station or may be performed by multiple base stations.
  • the multiple transmit antennas of the downlink multi-antenna channel detected by the user equipment 2 may be configured in the same base station, or may be configured. It is distributed over multiple base stations.
  • the number of downlink transmit antennas is 4, and the number of samples of the first matrix ⁇ 1 is 16.
  • Second matrix W 2 ⁇ 4-bit index feedback.
  • W 2 [(l, 0, e ja (l, ] ⁇ .
  • the predetermined codebook in this embodiment has two finer beam selections, with 16 discrete Fourier forms of vectors, and the entire codebook supports a closely arranged cross-polarized linear array, sparsely arranged cross-polarized linearity.
  • Various antenna configurations including arrays and uniform linear arrays.
  • the number of downlink transmit antennas is four.
  • the number of samples of the first matrix ⁇ is 8, 3 using 3-bit index feedback, and is expressed as the form shown in equation (2)
  • the second matrix W 2 uses 4-bit index feedback.
  • the predetermined codebook in this embodiment has four more fine Beam selection, with four discrete Fourier forms of the vector, the entire codebook supports a variety of antenna configurations including tightly arranged cross-polarized linear arrays, sparsely arranged cross-polarized linear arrays, and uniform linear arrays.
  • the number of downlink transmit antennas is four.
  • the number of samples of the first matrix ⁇ is 16, using 4-bit index feedback, and using the form shown in equation (2).
  • the same first matrix W is used.
  • the second matrix W 2 4 uses 4-bit index feedback .
  • the number of downlink transmit antennas is four.
  • the number of samples of the first matrix ⁇ is 8, using 3-bit index feedback, and using the form shown in equation (2).
  • the same first matrix W is used.
  • the second matrix W 2 is in the form represented by the formula (6) or (7), and the beam offset factor e, the polarization offset factor e ? , and the phase shift factor are respectively 1 bit, 1 bit, 2 Degree of freedom of bits, where ⁇ ⁇ .
  • the second matrix W 2 uses 4-bit index feedback.
  • the number of downlink transmit antennas is four.
  • the sample number of the first matrix ⁇ 1 is 16, and the 4-bit index feedback is used, and the form shown in the formula (2) is used.
  • the same first matrix Wi is used.
  • the second matrix W 2 uses 4-bit index feedback.
  • the number of downlink transmit antennas is four.
  • the number of samples of the first matrix ⁇ is 16, using 4-bit index feedback, and using the form shown in equation (2).
  • the same first matrix W is used.
  • Second matrix W 2 ⁇ Use 4-bit index feedback.
  • the number of downlink transmit antennas is four.
  • the number of samples of the first matrix ⁇ is 16, using 4-bit index feedback, and using the form shown in equation (2).
  • the same first matrix W is used.
  • the second matrix W 2 applies 4 bit cable Give feedback.
  • a different first matrix Wi is used for a rank of 1 or 2.
  • the first matrix ⁇ ⁇ is in the form shown in equation (2); for a rank of 2, the first matrix ⁇ 1 is used as equations (4) and (5) The form of the show.
  • the values or ranges of values given in the above embodiments are illustrative and not limiting, and any other suitable value or range of values is preferred.
  • the predetermined codebooks in the above embodiments mostly have a plurality of finer beam selections and multiple discrete Fourier forms of vectors, and the entire codebook supports a closely arranged cross-polarized linear array, sparsely arranged cross-polarization.
  • Various antenna configurations including linear arrays and linear arrays.
  • FIG. 3 shows a block diagram of a device 30 suitable for a MIMO system user equipment in accordance with one embodiment of the present invention.
  • the device 30 is typically disposed in the user device 2, and as shown, the device 30 includes a detection module 31, a determination module 33, and a feedback module 35.
  • the detection module 31 is configured to detect the downlink multi-antenna channel, corresponding to performing step 22 of the foregoing method 20.
  • the determining module 33 is configured to determine a rank according to the detection result of the downlink multi-antenna channel, and select one codeword from a predetermined codebook corresponding to the rank based on a predetermined criterion, corresponding to performing step 24 in the foregoing method 20.
  • the feedback module 35 is configured to feed back the index of the selected codeword and the rank, corresponding to performing step 26 of the foregoing method 20.
  • the predetermined codebook may be in the form described in any of the foregoing method embodiments.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système à entrées et sorties multiples (MIMO). Un des modes de réalisation concerne un procédé de rétroaction pour canaux multi-antennes appliqué dans un système MIMO comportant les étapes consistant à: détecter un canal multi-antennes en liaison descendante; déterminer un rang en fonction d'un résultat de la détection du canal multi-antennes en liaison descendante, et sélectionner, sur la base d'une règle prédéterminée, un mot de code dans un répertoire prédéterminé correspondant au rang; et renvoyer un indice du mot de code sélectionné et du rang, tout mot de code du répertoire prédéterminé étant un produit d'une première matrice indiquant des informations à long terme de canal à large bande et d'une deuxième matrice indiquant des informations à court terme de canal à bande étroite. Dans les solutions techniques de la présente invention, pour la rétroaction de canaux multi-antennes MIMO, une sélection plus fine des faisceaux et des vecteurs multiples dans une forme de Fourier discrète sont mis en œuvre, et diverses configurations d'antennes, parmi lesquelles un réseau linéaire à agencement serré et polarisation croisée, un réseau linéaire à agencement épars et polarisation croisée, et un réseau linéaire uniforme, sont prises en charge.
PCT/CN2013/000353 2013-03-27 2013-03-27 Procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système mimo WO2014153681A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2013/000353 WO2014153681A1 (fr) 2013-03-27 2013-03-27 Procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système mimo
CN201380073341.5A CN105075142B (zh) 2013-03-27 2013-03-27 Mimo系统中的多天线信道码本反馈方法及装置

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PCT/CN2013/000353 WO2014153681A1 (fr) 2013-03-27 2013-03-27 Procédé et appareil de rétroaction de répertoire pour canaux multi-antennes dans un système mimo

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023240654A1 (fr) * 2022-06-17 2023-12-21 北京小米移动软件有限公司 Procédé de détermination de mot de code pour une transmission d'antenne partiellement cohérente, et appareil associé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108919260B (zh) * 2018-05-11 2022-07-19 中国科学院电子学研究所 用于mimo阵列的相移偏移成像方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101615979A (zh) * 2008-06-24 2009-12-30 华为技术有限公司 多天线系统中的反馈指示方法、系统和设备
CN101667895A (zh) * 2009-10-10 2010-03-10 中兴通讯股份有限公司 多天线系统中信道信息量化码本的构造方法及装置
US20110051828A1 (en) * 2007-01-09 2011-03-03 Mark Kent Method and system for an efficient channel quantization method for mimo pre-coding systems
CN102404084A (zh) * 2010-09-16 2012-04-04 上海贝尔股份有限公司 用于确定预编码矩阵的方法及相应的通信方法和设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101969366B (zh) * 2010-09-26 2012-11-14 华中科技大学 用于8发射天线mimo系统的预编码方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110051828A1 (en) * 2007-01-09 2011-03-03 Mark Kent Method and system for an efficient channel quantization method for mimo pre-coding systems
CN101615979A (zh) * 2008-06-24 2009-12-30 华为技术有限公司 多天线系统中的反馈指示方法、系统和设备
CN101667895A (zh) * 2009-10-10 2010-03-10 中兴通讯股份有限公司 多天线系统中信道信息量化码本的构造方法及装置
CN102404084A (zh) * 2010-09-16 2012-04-04 上海贝尔股份有限公司 用于确定预编码矩阵的方法及相应的通信方法和设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023240654A1 (fr) * 2022-06-17 2023-12-21 北京小米移动软件有限公司 Procédé de détermination de mot de code pour une transmission d'antenne partiellement cohérente, et appareil associé

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CN105075142B (zh) 2019-05-24

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