WO2013107377A1 - Procédé pour un retour d'informations à partir d'un livre de codes, dispositif de réception de signaux, procédé et dispositif pour la transmission de signaux - Google Patents

Procédé pour un retour d'informations à partir d'un livre de codes, dispositif de réception de signaux, procédé et dispositif pour la transmission de signaux Download PDF

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Publication number
WO2013107377A1
WO2013107377A1 PCT/CN2013/070666 CN2013070666W WO2013107377A1 WO 2013107377 A1 WO2013107377 A1 WO 2013107377A1 CN 2013070666 W CN2013070666 W CN 2013070666W WO 2013107377 A1 WO2013107377 A1 WO 2013107377A1
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WO
WIPO (PCT)
Prior art keywords
signal
matrix
downtilt
preset
codebook set
Prior art date
Application number
PCT/CN2013/070666
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English (en)
Chinese (zh)
Inventor
史志华
董伟辉
刘建军
刘光毅
Original Assignee
中国移动通信集团公司
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Application filed by 中国移动通信集团公司 filed Critical 中国移动通信集团公司
Publication of WO2013107377A1 publication Critical patent/WO2013107377A1/fr

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Classifications

    • 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
    • H04L25/03949—Spatial equalizers equalizer selection or adaptation based on feedback
    • 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
    • H04B7/0417—Feedback 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
    • H04B7/06—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

Definitions

  • MIMO Multiple-input-multiple-output
  • the space division feature of the MIMO system enables the system to support multiple data streams, which improves the throughput of the system.
  • the diversity characteristics of the MIMO system can improve the reliability of the system transmission and improve the user experience.
  • the currently used MIMO technology belongs to two-dimensional (2D, 2 Dimensions) MIMO technology.
  • the precoding/beamforming technique passes the M transmit.
  • the signal corresponding to the antenna is weighted to match the current channel, thereby improving the performance of the system.
  • Embodiments of the present invention provide a codebook feedback method, a signal receiving apparatus, a signal transmitting method, and a device, which are used to provide a specific implementation scheme for transmitting signals between a signal sender and a signal receiver in a 3D MIMO system.
  • a codebook feedback method in a three-dimensional multiple-input multiple-output 3D MIMO system comprising the steps of: selecting, by a signal receiver in a 3D MIMO system, a thousand downtilts from a preset first set of codebooks, and from a pre- The set of second codebook sets selects thousands of matrices; sends the selected dip angle of the downtilt angle and the matrix identifier of the selected matrix to the signal sender.
  • a signal receiving apparatus in a three-dimensional multiple-input multiple-output 3D MIMO system comprising: a downtilt selection unit, configured to select a thousand downtilts from a preset first codebook set; and a matrix selection unit, configured to Selecting a thousand matrixes in the set of second codebooks set; sending unit, the inclination angle of the downtilt angle selected by the downtilt selection unit The matrix identification of the matrix selected by the identification and matrix selection unit is sent to the signal transmitting device.
  • a signal transmission method in a three-dimensional multiple-input multiple-output 3D MIMO system comprising the steps of: when a signal sender in a 3D MIMO system needs to send a signal to a signal receiver, select from a preset first codebook set Thousands of downtilt angles, and adjusting the equivalent downtilt angle of the transmitting antenna according to the selected downtilt angle; selecting thousands of matrices from the preset second codebook set, and according to the selected matrix, The signal stream of the signal receiver is weighted; the weighted signal stream is sent to the signal receiver by adjusting the transmit antenna after the equivalent downtilt angle.
  • a signal transmitting apparatus in a three-dimensional multiple-input multiple-output 3D MIMO system comprising: a downtilt selection unit, configured to: when the signal transmitting apparatus needs to send a signal to a signal receiving apparatus, from a preset first codebook set Selecting a thousand downtilt angles; a downtilt angle adjusting unit for adjusting the equivalent downtilt angle of the transmitting antenna according to the downtilt angle selected by the downtilt selecting unit; and a matrix selecting unit for using the second codebook set in advance a plurality of matrixes are selected in the set; a weighting processing unit is configured to perform weighting processing on the signal stream that needs to be sent to the signal receiving device according to the matrix selected by the matrix selecting unit; and a signal transmitting unit for adjusting by the downtilt adjusting unit The transmit antenna after the dip angle is sent to the signal receiving device by the signal stream subjected to the weighting processing by the weighting processing unit.
  • a first codebook set and a second codebook set are set in advance for a 3D MIMO system, where the first codebook set includes a preset number of downtilts, and the second codebook set includes a preset If thousands of matrices, the signal sender in the 3D MIMO system needs to send a signal to the signal receiver, select a thousand downtilt angles from the first codebook set, and according to the selected downtilt angle, the transmit antenna, etc.
  • FIG. 1 is a schematic diagram showing the structure of a transmitting antenna of a 2D MIMO system in the prior art
  • FIG. 2 is a schematic structural diagram of a transmitting antenna of a 3D MIMO system
  • FIG. 3 is a schematic flowchart of a codebook feedback method in a 3D MIMO system according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic structural diagram of a signal receiving apparatus in a 3D MIMO system according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of a signal sending method in a 3D MIMO system according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic structural diagram of a signal transmitting apparatus in a 3D MIMO system according to Embodiment 4 of the present invention.
  • 3D MIMO technology each antenna consists of K small units (which can be called antenna elements).
  • the 3D MIMO system can directly control each antenna element through baseband processing.
  • precoding/beam assignment The type technique can weight the signals corresponding to the MXK antenna elements.
  • 3D MIMO technology can dynamically change part of the bandwidth or the downtilt angle of the whole antenna through the processing of the baseband signal. On the one hand, it can improve the energy of the current user receiving signal, on the other hand, it can effectively suppress the system between The interference can improve the overall performance of the wireless network.
  • FIG. 3 it is a flowchart of a codebook feedback method in a 3D MIMO system according to Embodiment 1 of the present invention, and the specific processing procedure is as follows:
  • Step 31 The signal receiver in the 3D MIMO system selects thousands of downtilts from the preset first codebook set, and selects thousands of matrices from the preset second codebook set.
  • the first codebook set includes a preset number of thousands of downtilts
  • the second codebook set includes a preset number of thousands of matrices.
  • the signal sender in the 3D MIMO system may be a base station, and the corresponding signal receiver is a User Equipment (UE, User Equipment), and the signal sender may also be a UE, and the corresponding signal receiver is a base station.
  • UE User Equipment
  • the signal receiver can select, but is not limited to, a downtilt and a matrix according to a preset selection criterion.
  • the selection criterion can be the largest capacity, the least interference, or the highest signal to interference plus noise ratio (SINR). .
  • a first codebook set C1 and a second codebook set C2 are preset for the 3D MIMO system, specifically:
  • the first codebook set C1 includes T elements, each element corresponding to a downtilt angle of the transmitting antenna of the signal sender, that is, the first codebook set C1 contains thousands of downtilt angles;
  • each matrix subset contains thousands of matrices for weighting signals corresponding to one antenna frame in the same horizontal direction (the same row).
  • the matrix subsets respectively correspond to the number of signals in the signal stream received by the signal receiver.
  • the matrix subset R1 corresponds to the number of signals 1 (ie, one signal in the signal stream)
  • the matrix sub- The set R2 corresponds to the number of signals 2 (i.e., two signals in the signal stream)
  • the matrix subset Ri corresponds to the number of signals i (i.e., i signals in the signal stream).
  • the signal receiver selects a thousand matrix from the second codebook set C2, first selects a signal to be received in the matrix subset included in the second codebook set C2 according to the number of signals in the signal stream to be received. A matrix subset corresponding to the number of signals in the stream, and selects a thousand matrices from the selected matrix subset.
  • the number of rows of each matrix in each matrix subset is the number M of transmitting antennas of the signal sender, and the number of columns is the number of signals corresponding to the matrix subset.
  • the size of each matrix in the matrix subset R1 is ⁇ ⁇ 1
  • the size of each matrix in the matrix sub-set R2 is ⁇ ⁇ 2
  • the size of each matrix in the matrix subset Ri is ⁇ ⁇ i.
  • Each downtilt angle in the first codebook set CI has a corresponding number, that is, a corresponding tilt angle identifier
  • each matrix in the second codebook set C2 also has a corresponding number, that is, a corresponding matrix identifier.
  • the signal receiver selects a thousand downtilt angles from the first codebook set C1
  • the following two modes may be used:
  • the signal receiver selects a downtilt angle from the preset first codebook set C1;
  • the signal receiver selects M downtilts from the preset first codebook set C1.
  • the signal receiver selects a matrix from the preset second codebook set C2;
  • the signal receiver selects K matrices from the preset second codebook set C2.
  • First feedback mode The signal receiver selects one of the preset first codebook sets C1. a downtilt angle, selecting a matrix from the preset second codebook set C2;
  • the second feedback mode the signal receiver selects M downtilts from the preset first codebook set C1, and selects a matrix from the pre-set second codebook set C2;
  • the third feedback mode the signal receiver selects a downtilt angle from the preset first codebook set C1, and selects K matrices from the pre-set second codebook set C2;
  • the fourth feedback mode The signal receiver selects M downtilts from the preset first codebook set C1, and selects K matrices from the pre-set second codebook set C2.
  • Step 32 Send the selected dip angle of the downtilt and the matrix identifier of the selected matrix to the signal sender.
  • the signal receiver can be, but is not limited to, performing codebook feedback periodically.
  • the first codebook set C1 and the second codebook set C2 correspond to the same feedback period, for example, the simultaneous feedback tilt indicator and the matrix identifier, and the first codebook set.
  • the C1 and the second codebook set C2 may also correspond to different feedback periods.
  • the feedback period of the first codebook set C1 may be an integer multiple of the feedback period of the second codebook set C2.
  • the signal receiver selects a downtilt angle
  • the selected dip angle of the downtilt is sent to the signal transmission.
  • M downtilt angles are selected, the selected dip angles of each selected downtilt angle are sent to the signal sender.
  • the signal receiver selects a matrix, the matrix identifier of the selected matrix will be selected. The signal is sent to the sender of the signal. If K matrices are selected, the matrix identifier corresponding to each matrix selected is sent to the signal sender.
  • the signal receiver and the signal sender may pre-store the first codebook set C1 and the second codebook set C2, followed by The codebook feedback may be directly used by using the pre-stored first codebook set C1 and the second codebook set C2; in addition, the signal receiver and the signal sender may also obtain the first codebook set C1 and the first time from the network device. Two codebook sets C2.
  • the signal receiver may perform codebook feedback based on the full bandwidth, or perform codebook feedback based on the subband, and preset each subband of the codebook feedback, and the signal receiver selects the downtilt and the matrix. And, for each subband preset, respectively selecting a thousand downtilt angles from the preset first codebook set, and selecting a thousand matrixes from the preset second codebook set, and then targeting the preset For each sub-band, the dip identifier of the downtilt selected for the sub-band and the matrix identifier of the selected matrix are respectively sent to the signal sender.
  • the second embodiment of the present invention provides a signal receiving apparatus in a 3D MIMO system, and the structure thereof is as shown in FIG. 4, including:
  • a downtilt selection unit 41 configured to select a thousand downtilt angles from a preset first set of codebooks
  • a matrix selection unit 42 configured to select, if necessary, thousands of matrices from a preset second set of codebooks
  • the transmitting unit 43 is configured to transmit the tilt indicator of the downtilt selected by the downtilt selection unit 41 and the matrix identifier of the matrix selected by the matrix selecting unit 42 to the signal transmitting apparatus.
  • the second codebook set includes a plurality of matrix sub-sets, each matrix sub-set includes a plurality of matrixes, each matrix sub-set corresponding to the number of signals in the signal stream received by the signal receiver, the matrix The number of rows of each matrix in the subset is the number of transmit antennas of the signal transmitting device, and the number of columns is the number of signals in the signal stream received by the signal receiver;
  • the matrix selection unit 42 specifically includes:
  • a matrix sub-set selection sub-unit configured to select, according to the number of signals in the signal stream that the signal receiving device needs to receive, in the thousands of matrix subsets included in the second codebook set, and in the signal stream to be received a matrix subset corresponding to the number of signals;
  • the matrix selection sub-unit is used to select a thousand matrices from the matrix sub-sets selected from the sub-units of the matrix sub-set.
  • the downtilt selection unit 41 is specifically configured to select, for each subband of the received signal, a thousand downtilts from the preset first set of codebooks;
  • the matrix selection unit 42 is specifically configured to select, if the sub-frames are preset, from the preset second codebook set, if there are thousands of matrices;
  • the sending unit 43 is specifically configured to respectively use, for each of the preset sub-bands, a tilt indicator of the downtilt angle selected by the downtilt selecting unit 41 for the sub-band and a matrix identifier of the matrix selected by the matrix selecting unit 42 for the sub-band. Sent to the sender of the signal.
  • the downtilt selection unit 41 is specifically configured to select a downtilt angle from the preset first codebook set.
  • the downtilt selection unit 41 is specifically configured to select M downtilts from the preset first codebook set.
  • M is the number of transmit antennas of the signal transmitting device.
  • the matrix selecting unit 42 is specifically configured to select a matrix from the preset second codebook set.
  • the matrix selecting unit 42 is specifically configured to select K matrices from a preset second set of codebooks, where K is the number of antenna matrices included in each transmit antenna of the signal transmitting device.
  • FIG. 5 it is a flowchart of a signal sending method in a 3D MIMO system according to Embodiment 3 of the present invention, and the specific processing flow is as follows:
  • Step 51 When the signal sender in the 3D MIMO system needs to send a signal to the signal receiver, select a thousand downtilt angles from the preset first codebook set, and select the downtilt angle to the transmit antenna. The equivalent downtilt angle is adjusted;
  • the signal sender in the 3D MIMO system may be a base station, and the corresponding signal receiver is a UE, and the signal sender may also be a UE, and the corresponding signal receiver is a base station.
  • the first codebook set mentioned in the third embodiment of the present invention is identical to the first codebook set C1 in the first embodiment of the present invention.
  • the second codebook set mentioned in the third embodiment of the present invention and the embodiment of the present invention The second codebook set C2 in one is not repeated here.
  • the signal sender in the 3D MIMO system when it needs to send a signal to the signal receiver, it may directly select a thousand downtilt angles in the preset first codebook set C1, for example, select a downtilt angle. Or select M downtilt angles, wherein the signal sender can select the downtilt angle for the signal receiver in a time-sharing manner, for example, at the DO time, select the first downtilt angle in the first codebook set, at D1 At the moment, the second downtilt angle in the first codebook set is selected, and so on, at the time Ds, the (s-1)th downtilt angle in the first codebook set is selected.
  • the third embodiment of the present invention further provides that the signal sender may also receive the thousands of tilt indicators that are fed back by the signal receiver, and then, when it is required to send a signal to the signal receiver, according to the received thousand tilt angles, from the advance A corresponding number of downtilt angles are selected in the set of first codebooks set.
  • the manner in which the signal receiving direction signal is sent to the sender in the 3D MIMO system is the same as that in the first embodiment of the present invention, and details are not described herein again.
  • the signal sender can directly select the downtilt angle corresponding to the received tilt angle identifier in the first codebook set C1 according to the received tilt angle identifier, and if the signal receiver feeds back a tilt angle identifier, the signal is sent.
  • the sender selects the received downtilt angle corresponding to the tilt indicator in the first codebook set C1.
  • the signal sender respectively marks the first tilt angle for each received Select this dump in the codebook set C1
  • the angle corresponding to the downtilt angle in addition, when the signal sender selects the downtilt angle, it can not only be based on the inclination indication of the signal receiver feedback, but also can integrate other factors (such as the current system state or the inclination indicator of other signal receiver feedback).
  • the downtilt angle is selected in the first codebook set C1.
  • the signal sender selects a thousand downtilt angles from the first codebook set C1
  • the following two modes may be used:
  • the signal sender selects a downtilt angle from the preset first codebook set C1. At this time, the signal sender adjusts the equivalent downtilt angle of the transmitting antenna according to the selected downtilt angle, for each transmitting antenna. , respectively adjusting the equivalent downtilt angle of the transmitting antenna to the selected downtilt angle.
  • the signal sender adjusts the equivalent downtilt angle of all the transmitting antennas to the downtilt angle ⁇ .
  • the signal receiver selects one downtilt angle from the preset first codebook set C1. At this time, the signal sender adjusts the equivalent downtilt angle of the transmitting antenna according to the selected downtilt angle, for each transmission.
  • the antenna determines a downtilt angle corresponding to the transmitting antenna in each selected downtilt angle, and adjusts an equivalent downtilt angle of the transmitting antenna to the determined downtilt angle.
  • the signal transmitter adjusts the equivalent downtilt angle of the transmitting antenna 1 to cd, adjusts the equivalent downtilt angle of the transmitting antenna 2 to ⁇ 2 , and so on, and transmits The equivalent downtilt angle of the antenna ⁇ is adjusted to ⁇ ⁇ .
  • the signal receiver may receive the thousands of tilt indicators respectively fed back to the preset sub-bands, and the signal sender responds to the required signal.
  • Each physical resource block (PRB) of the signal transmitted by the receiver determines a thousand dip marks that are fed back by the signal receiving policy to the subband to which the PRB belongs, and according to the determined dip mark, from the preset A corresponding number of downtilt angles are selected in a codebook set C1.
  • the signal sender selects each PRB that needs to send a signal to the signal receiver according to the PRB.
  • the downtilt angle is adjusted for the equivalent downtilt of the PRB of each transmitting antenna.
  • Step 52 Select, if necessary, thousands of matrices from the preset second codebook set, and perform weighting processing on the signal stream that needs to be sent to the signal receiver according to the selected matrix;
  • the matrix when the signal sender in the 3D system needs to send a signal to the signal receiver, the matrix may be directly selected in the preset second codebook set C2, for example, selecting a matrix or selecting a matrix, wherein the signal sender can select a matrix for the signal receiver in a time-sharing manner, for example, at the time of DO, if the number of transmitted signals is J, then the J from the second codebook set The first matrix is selected from the matrix subsets. At the time D1, if the number of signals is J, the second matrix is selected from the Jth matrix subset of the second codebook set, and so on.
  • the third embodiment of the present invention further provides that the signal sender may first receive the thousands of matrix identifiers fed back by the signal receiver, and then, when it is required to send a signal to the signal receiver, according to the received thousands of matrix identifiers, from the advance A corresponding number of matrices are selected in the set second codebook set.
  • the manner of the signal receiving direction signal sender feedback matrix identifier in the 3D MIMO system is the same as that in the first embodiment of the present invention, and details are not described herein again.
  • the signal sender can directly select the matrix corresponding to the received matrix identifier in the second codebook set C2 according to the received matrix identifier, and if the signal receiver feeds back a matrix identifier, the signal is sent.
  • the square selects the matrix corresponding to the matrix identifier received in the second codebook set C2, and if the signal receiver feeds back K matrix identifiers, the signal sender separately identifies each matrix identifier in the second codebook.
  • the matrix corresponding to the matrix identifier is selected; in addition, when the signal sender selects the matrix, not only according to the matrix identifier fed back by the signal receiver, but also other factors (such as the current system state or the matrix identifier of the feedback of other signal receivers) ) to select a matrix from the second codebook set C2.
  • the signal sender selects a matrix from the preset second codebook set C2. At this time, the signal sender calculates and selects the signal stream to be sent to the signal receiver according to the selected matrix.
  • the conjugate transposed matrix of the matrix wherein the size of the selected matrix is M x J, M is the number of transmit antennas of the signal sender, and J is the number of signals in the signal stream that needs to be sent to the signal receiver, and the signal is sent.
  • the multiplier is calculated by multiplying the calculated conjugate transposed matrix and the signal stream that needs to be sent to the signal receiver, and M signals can be obtained.
  • the matrix selected by the signal sender is the matrix V
  • the conjugate transposed matrix of the matrix V is V H , which will be conjugated.
  • the transposition matrix V H and S are multiplied to obtain SV H , and M signals can be obtained.
  • the signal receiver selects K matrices from the preset second codebook set C2.
  • the signal sender performs weighting processing on the signal stream to be sent to the signal receiver according to the selected matrix, and selects For each matrix of the matrix, the conjugate transposed matrix of the matrix is separately calculated, and then the calculated conjugate transposed matrix and the signal stream that needs to be sent to the signal receiver are multiplied to obtain M signals, and a total of ⁇ can be obtained.
  • the matrix selected by the signal sender is the matrix V l .. ⁇ , V K
  • the conjugate transposed matrix of .. , K ) is obtained by multiplying the conjugate transposed matrices V and S to obtain SV, and M signals can be obtained, and a total of ⁇ ⁇ signals are obtained.
  • the signal sender when the signal sender receives the matrix identifier fed back by the signal receiver, it may receive the thousands of matrix identifiers respectively fed back by the signal receiver for the preset subbands, and the signal sender is directed to the required signal.
  • Each PRB of the signal sent by the receiver determines the thousands of matrix identifiers that the signal receiving policy feeds back to the subband to which the PRB belongs, and selects a corresponding one from the preset second codebook set C2 according to the determined matrix identifier.
  • Step 53 Send the weighted signal stream to the signal receiver by adjusting the transmit antenna after the equivalent downtilt angle.
  • the signal sender selects a matrix from the preset second codebook set C2
  • the signal sender can obtain M signals by weighting the signal stream that needs to be sent to the signal receiver, and the signal sender can adjust the signal.
  • the transmit antenna after the equivalent downtilt is first determined for each signal obtained after the weighting process, and the equivalent downtilt angle is adjusted corresponding to the signal.
  • the transmit antenna is transmitted to the signal receiver via the determined transmit antenna.
  • the transmitting antenna 2 transmits the signal W 2 after adjusting the equivalent downtilt angle, and so on, and transmits the signal W M by adjusting the transmitting antenna M after the equivalent downtilt angle.
  • the signal sender can perform KXM signals by weighting the signal stream that needs to be sent to the signal receiver, and the signal sender passes the signal. Adjusting the transmit antenna after the equivalent downtilt angle, and sending the weighted signal stream to the signal receiver, first determining the equivalent downtilt angle corresponding to the signal for each signal obtained after the weighting process a transmitting antenna, and determining an antenna frame corresponding to the signal in the determined antenna frame included in the transmitting antenna, and transmitting the signal to the signal receiving side through the determined antenna element.
  • the signal obtained by the signal sender after weighting the signal stream is:
  • the signal transmitting side transmits a signal through the antenna element 1 is adjusted w equivalent to the tilt angle transmitting antenna 1 U, 12 is ⁇ angle, and so on, the transmission signal by adjusting the antenna element 2 through a transmit antenna 1.
  • the antenna element K in the transmitting antenna M transmits a signal W KM .
  • the signal transmitting direction signal receiving side sends the signal in the following four ways:
  • the transmission signal W l transmits the signal W 2 by adjusting the equivalent downtilt angle of the transmitting antenna 2, and so on, and transmits the signal W M by adjusting the transmitting antenna M after the equivalent downtilt angle.
  • the third transmission mode the signal sender selects a downtilt angle ⁇ from the preset first codebook set C1, and adjusts the equivalent downtilt angles of all the transmitting antennas to the downtilt angle ⁇ , from the preset second codebook.
  • the transposed matrix ⁇ multiplies the conjugate transposed matrices V and S to obtain S signals capable of obtaining M signals, one of which is as follows:
  • the signal transmitting side transmits a signal through the antenna element 1 is adjusted w equivalent to the tilt angle transmitting antenna 1 U, 12 is ⁇ angle, and so on, the transmission signal by adjusting the antenna element 2 through a transmit antenna 1.
  • ⁇ equivalent The antenna element K in the transmitting antenna M transmits a signal W KM .
  • the fourth transmission mode The signal sender selects the downtilt angle Cd, ⁇ ⁇ from the preset first codebook set C1, and adjusts the equivalent downtilt angle of the transmitting antenna 1 to ⁇ ⁇ to transmit the equivalent of the antenna 2
  • the tilt angle is adjusted to ⁇ 2
  • the equivalent downtilt angle of the transmitting antenna ⁇ is adjusted to ⁇ ⁇
  • one matrix Vi, .. ⁇ , V K is selected from the preset second codebook set C2, and needs to be sent.
  • the SV can be obtained, and M signals can be obtained, and a total of KXM signals are obtained:
  • the signal transmitting side transmits a signal through the antenna element 1 is adjusted w equivalent to the tilt angle transmitting antenna 1 U, 12 is ⁇ angle, and so on, the transmission signal by adjusting the antenna element 2 through a transmit antenna 1.
  • the antenna element K in the transmitting antenna M transmits a signal W KM .
  • the first codebook set and the second codebook set are set in advance for the 3D MIMO system, where the first codebook set includes a preset number of downtilts, and the second code The set contains a preset number of thousands of matrices, and the signal sender in the 3D MIMO system needs to send a signal to the signal receiver, from the first codebook.
  • the embodiment of the present invention provides a specific implementation scheme for transmitting signals between a signal sender and a signal receiver in a 3D MIMO system, which can effectively reduce the overhead of codebook feedback, improve system performance, and reduce system implementation.
  • the overall complexity can effectively reduce the overhead of codebook feedback, improve system performance, and reduce system implementation.
  • the fourth embodiment of the present invention provides a signal transmission apparatus in a 3D MIMO system, and the structure thereof is as shown in FIG. 6, which includes:
  • a downtilt selection unit 61 configured to select, if the signal transmitting device needs to send a signal to the signal receiving device, a thousand downtilt angles from the preset first codebook set;
  • the downtilt adjustment unit 62 is configured to adjust the equivalent downtilt angle of the transmitting antenna according to the downtilt angle selected by the downtilt selection unit 61;
  • a matrix selection unit 63 configured to select, if the matrix is set from a preset second codebook set
  • the weighting processing unit 64 is configured to perform weighting processing on the signal stream that needs to be sent to the signal receiving device according to the matrix selected by the matrix selecting unit 63;
  • the signal transmitting unit 65 is configured to adjust the transmitting antenna after the equivalent downtilt angle by the downtilt adjusting unit 62, and send the signal stream subjected to the weighting processing by the weighting processing unit 64 to the signal receiving apparatus.
  • the signal transmitting device further includes a tilt indicator receiving unit, configured to receive, if the thousand downtilt angles are selected from the preset first codebook set by the downtilt selecting unit 61, the receiving signal receiving device feeds back thousands of Dip mark
  • the downtilt selection unit 61 is specifically configured to select a corresponding number of downtilts from the preset first codebook set according to the thousands of inclination indicators received by the inclination indicator receiving unit;
  • the signal receiving device further includes a matrix identifier receiving unit, configured to receive, if the matrix selecting unit 63 selects thousands of matrices from the preset second codebook set, the thousands of matrix identifiers fed back by the receiving signal receiving device;
  • the matrix selecting unit 63 is specifically configured to select a corresponding number of matrices from the preset second codebook set according to the thousands of matrix identifiers received by the matrix identifier receiving unit.
  • the dip identifier receiving unit is specifically configured to receive, by the signal receiving party, respectively, a plurality of tilt indicators for each preset sub-band;
  • the downtilt selection unit 61 is specifically configured to determine, for each PRB that needs to send a signal to the signal receiver, the signal receiving policy, and the thousands of inclination indicators that are fed back to the subband to which the PRB belongs, and according to the determined inclination indicator, Selecting a corresponding number of downtilt angles in the preset first codebook set;
  • the downtilt adjustment unit 62 is specifically configured to respectively perform, according to each PRB that needs to send a signal to the signal receiver,
  • the downtilt selection unit 61 adjusts the equivalent downtilt angle of the PRB of each of the transmitting antennas for the downtilt angle selected by the PRB.
  • the matrix identifier receiving unit is specifically configured to receive, by the signal receiver, respectively, thousands of matrix identifiers that are respectively fed back for the preset subbands;
  • the matrix selection unit 63 is specifically configured to determine, for each PRB that needs to send a signal to the signal receiver, a thousand matrix identifiers that are fed back by the signal receiving policy to the subband to which the PRB belongs, and according to the determined matrix identifier, from the foregoing Selecting a corresponding number of matrices in the set of second codebooks set;
  • the weighting processing unit 64 is specifically configured to, for each PRB that needs to send a signal to the signal receiver, perform a force on the signal stream that needs to be sent to the signal receiver according to the matrix selected by the matrix selecting unit 63 for the PRB. P right processing.
  • the downtilt selection unit 61 is specifically configured to select a downtilt angle from the preset first codebook set; the downtilt adjustment unit 62 is specifically configured to respectively transmit the antenna for each transmit antenna The dip angle is adjusted to the downtilt angle selected by the downtilt selection unit 61.
  • the downtilt selection unit 61 is specifically configured to select M downtilts from the preset first codebook set, where M is the number of transmit antennas of the signal transmitting device;
  • the downtilt adjustment unit 62 specifically includes:
  • a downtilt determining subunit configured to determine, according to each of the transmitting antennas, a downtilt angle corresponding to the transmitting antenna in each of the downtilt angles selected by the downtilt selecting unit 61;
  • a second downtilt adjustment subunit configured to adjust, respectively, the equivalent downtilt angle of the transmit antenna to a downtilt angle corresponding to the transmit antenna determined by the downtilt determination subunit for each transmit antenna.
  • the matrix selection unit 63 is specifically configured to select a matrix from a preset second set of codebooks.
  • the weighting processing unit 64 specifically includes:
  • a first conjugate transposed matrix calculation sub-unit for calculating a conjugate transposed matrix of the matrix selected by the matrix selecting unit 63, wherein the number of rows of the matrix selected by the matrix selecting unit 63 is the transmission of the signal transmitting device
  • the number of antennas M, the number of columns is the number J of signals in the signal stream that needs to be sent to the signal receiving device;
  • a first operation subunit configured to multiply a conjugate transposed matrix calculated by the first conjugate transposed matrix calculation subunit and a signal stream that needs to be sent to the signal receiving device to obtain M signals;
  • the signal sending unit 65 specifically includes:
  • a first transmit antenna determining subunit configured to determine, for each signal obtained by the weighting processing unit 64, a transmit antenna after the downtilt adjustment unit 62 adjusts the equivalent downtilt angle
  • the matrix selecting unit 63 is specifically configured to select K matrices from a preset second set of codebooks, where K is the number of antenna matrices included in each transmit antenna of the signal transmitting device;
  • the weighting processing unit 64 specifically includes:
  • a second conjugate transposed matrix calculation sub-unit for calculating, for each matrix selected by the matrix selecting unit 63, a conjugate transposed matrix of the matrix, wherein the matrix of each matrix selected by the matrix selecting unit 63 is selected
  • the number is the number M of transmitting antennas of the signal transmitting device, the number of columns is the number J of signals in the signal stream that needs to be transmitted to the signal receiving device, and the second arithmetic subunit is used for each selected by the matrix selecting unit 63.
  • a matrix respectively, the conjugate transposed matrix of the matrix calculated by the second conjugate transposed matrix calculation subunit and the signal stream to be sent to the signal receiving device are multiplied to obtain M signals;
  • the signal sending unit 65 specifically includes:
  • a second transmit antenna determining subunit configured to determine, for each signal obtained by the weighting processing unit 64, a transmit antenna after the downtilt adjustment unit 62 adjusts the equivalent downtilt angle
  • An antenna ray determining subunit each of the signals obtained by performing weighting processing on the weighting processing unit 64, respectively determining, in the antenna ray included in the transmitting antenna corresponding to the signal determined by the second transmitting antenna determining subunit The antenna frame corresponding to the signal;
  • a second signal transmitting subunit configured to determine, by each of the signals obtained by the weighting processing unit 64, the antenna element corresponding to the signal determined by the antenna element determining subunit, and transmitting the signal to the signal Receiving device.

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

Abstract

La présente invention se rapporte à un procédé pour un retour d'informations à partir d'un livre de codes. L'invention se rapporte d'autre part à un dispositif de réception de signaux, ainsi qu'à un procédé et à un dispositif pour la transmission de signaux. Le procédé de transmission de signaux, selon l'invention, comprend les étapes consistant : quand un dispositif de transmission de signaux d'un système MIMO 3D doit transmettre un signal à un dispositif de réception de signaux, à sélectionner une pluralité d'angles de déclinaison à partir d'un premier ensemble prédéfini de livres de codes, et à régler des angles de déclinaison équivalents d'une antenne de transmission sur la base des angles de déclinaison sélectionnés ; à sélectionner une pluralité de matrices de signaux à partir d'un second ensemble prédéfini de livres de codes et à pondérer un flux de signaux devant être envoyé au dispositif de réception de signaux sur la base des matrices de signaux sélectionnées ; et à transmettre le flux de signaux pondéré, au dispositif de réception de signaux, via l'antenne de transmission ayant les angles de déclinaison équivalents réglés. Dans un mode de réalisation particulier, la présente invention se rapporte à la transmission de signaux entre un dispositif de transmission de signaux et un dispositif de réception de signaux dans un système MIMO 3D.
PCT/CN2013/070666 2012-01-19 2013-01-18 Procédé pour un retour d'informations à partir d'un livre de codes, dispositif de réception de signaux, procédé et dispositif pour la transmission de signaux WO2013107377A1 (fr)

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CN201210017691.7A CN103220026B (zh) 2012-01-19 2012-01-19 码本反馈方法及信号接收装置、信号发送方法及装置
CN201210017691.7 2012-01-19

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