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    METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION
    2.
    发明申请
    METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION 审中-公开

    公开(公告)号：US20190341979A1

    公开(公告)日：2019-11-07

    申请号：US16337841

    申请日：2017-07-12

    Applicant: China Academy of Telecommunications Technology

    Inventor： Qiubin GAO ,  Runhua CHEN ,  Tamrakar RAKESH ,  Hui LI ,  Qiuping HUANG

    IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04W88/06

    Abstract: Disclosed in the present invention are a method and a device for transmitting channel state information, for solving the problem that due to the limitation of a codebook structure, the prior art can only provide channel state information with limited precision and it is not suitable for a base station to use a transmission scheme of an advanced preprocessing algorithm. The method comprises: a terminal determining a basis matrix according to a candidate wave beam vector set, the basis matrix being a matrix formed by N wave beam vectors from the candidate wave beam vector set, the N being a positive integer; the terminal determining a combined coefficient matrix according to the basis matrix and a channel state parameter; the terminal feeding back the identification information of the basis matrix and the combined coefficient matrix to a base station. The invention effectively improves the precision of channel state information feedback, and improves the performance of multi-antenna transmission, especially multiple user-multiple input multiple output (MU-MIMO) transmission.

    REFERENCE SIGNAL TRANSMISSION METHOD, TRANSMITTER AND RECEIVER
    3.
    发明申请
    REFERENCE SIGNAL TRANSMISSION METHOD, TRANSMITTER AND RECEIVER 审中-公开

    公开(公告)号：US20190312697A1

    公开(公告)日：2019-10-10

    申请号：US16349014

    申请日：2017-12-28

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Hui LI ,  Qiubin GAO ,  Rakesh TAMRAKAR ,  Xin SU ,  Runhua CHEN ,  Qiuping HUANG ,  Chuanjun LI ,  Mengjun WANG

    IPC: H04L5/00 ,  H04B7/0456

    Abstract: The present disclosure provides a reference signal transmission method, a transmitter and a receiver. The reference signal transmission method includes: precoding, by a transmitter, a data stream for user data through a second precoding matrix so as to acquire D virtual data streams; precoding, by the transmitter, the D virtual data streams through a first precoding matrix, and transmitting the D precoded virtual data streams to a receiver via T antenna groups, each antenna group including one or more antenna units or antenna ports having a same phase noise; transmitting, by the transmitter, D demodulation reference signals to the receiver; and transmitting, by the transmitter, M phase-tracking reference signals to the receiver, the M phase-tracking reference signals being adopted to track phase changes in the T antenna groups caused by one or more phase noise sources.

    METHOD AND APPARATUS FOR TRANSMITTING INITIAL ACCESS SIGNAL
    4.
    发明申请
    METHOD AND APPARATUS FOR TRANSMITTING INITIAL ACCESS SIGNAL 审中-公开

    公开(公告)号：US20190297560A1

    公开(公告)日：2019-09-26

    申请号：US16317829

    申请日：2017-06-08

    Applicant: China Academy of Telecommunications Technology

    Inventor： Qiubin GAO ,  Runhua CHEN ,  Hui LI ,  Tamrakar RAKESH ,  Qiuping HUANG ,  Yu YANG ,  Yang SONG ,  Xin SU ,  Mengjun WANG ,  Chuanjun LI

    IPC: H04W48/08 ,  H04W72/04

    Abstract: Disclosed are a method and apparatus for transmitting an initial access signal, thus solving the existing problem wherein transmitting and detecting of synchronization signals cannot be applied to large-scale network coverage of a future communication system. The method comprises: determining at least one to-be-transmitted identification information of a synchronization block, the synchronization block comprising at least two components for transmitting an initial access signal, and different components occupying different time-frequency resources of the synchronization block; determining an initial access signal transmitted by each component in the synchronization block according to the identification information; and determining a time-frequency resource occupied by each component in the synchronization block and transmitting the initial access signal of the component on the time-frequency resource occupied by each component.

    REFERENCE SIGNAL MAPPING METHOD AND DEVICE
    5.
    发明申请
    REFERENCE SIGNAL MAPPING METHOD AND DEVICE 审中-公开

    公开(公告)号：US20190229869A1

    公开(公告)日：2019-07-25

    申请号：US16337936

    申请日：2017-09-27

    Applicant: China Academy of Telecommunications Technology

    Inventor： Hui LI ,  Runhua CHEN ,  Qiubin GAO ,  Tamrakar RAKESH ,  Qiuping HUANG

    IPC: H04L5/00 ,  H04L27/26

    Abstract: Disclosed are a reference signal mapping method and device, used for realizing a CSI-RS mapping of 16 or more ports, so as to realize a CSI-RS transmission of 16 or more ports. The method comprises: according to an N port reference signal pattern, determining that a channel state information reference signal (CSI-RS) is mapped on a resource unit RE, N being an integer greater than 16, wherein, an RE position, having one N port CSI-RS of the N port reference signal pattern mapped thereto, is determined according to an RE position having a CSI-RS in a plurality of groups of 8 port reference signal patterns mapped thereto, each S port in the N port is multiplexed with S code words of 8 code words using an 8-bit orthogonal spreading code, and the 8 port reference signal pattern is an 8 port CSI-RS pattern defined by 3GPP Rel-13; and performing resource mapping on the CSI-RS according to the determined RE.

    PRECODING MATRIX DETERMINATION METHOD AND PRECODING MATRIX DETERMINATION DEVICE
    6.
    发明申请
    PRECODING MATRIX DETERMINATION METHOD AND PRECODING MATRIX DETERMINATION DEVICE 审中-公开

    公开(公告)号：US20180241449A1

    公开(公告)日：2018-08-23

    申请号：US15751460

    申请日：2016-08-08

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Hui LI ,  Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Rakesh TAMRAKAR

    IPC: H04B7/04 ,  H04B7/06

    CPC classification number: H04B7/0486 ,  H04B7/0473 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0639

    Abstract: A precoding matrix determination method and a precoding matrix determination device are provided. The precoding matrix determination method includes: dividing each of the groups of vertical-dimension beams into a plurality of subgroups of vertical-dimension beams, and dividing each of the groups of horizontal-dimension beams into a plurality of subgroups of horizontal-dimension beams; determining a first stage codebook in accordance with a Kronecker product of each subgroup of vertical-dimension beams acquired by dividing each of the groups of vertical-dimension beams and each subgroup of horizontal-dimension beams acquired by dividing each of the groups of horizontal-dimension beams; and selecting a plurality of columns of beams from the determined first stage codebook using a second stage codebook, and performing phase adjustment to determine a precoding matrix.

    METHODS AND APPARATUSES FOR TRANSMITTING CODING INDICATION INFORMATION AND DETERMINING PRECODING MATRIX
    7.
    发明申请
    METHODS AND APPARATUSES FOR TRANSMITTING CODING INDICATION INFORMATION AND DETERMINING PRECODING MATRIX 审中-公开

    公开(公告)号：US20180241445A1

    公开(公告)日：2018-08-23

    申请号：US15755090

    申请日：2016-07-19

    Applicant: China Academy of Telecommunications Technology

    Inventor： Hui LI ,  Shanzhi CHEN ,  Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Tamrakar RAKESH

    IPC: H04B7/0456 ,  H04B7/06

    Abstract: Methods and apparatuses for transmitting coding indication information and determining a precoding matrix, for use in resolving the problem that the resolution of code words in a codebook generated by using a combination of a beam vector subgroup and column selection cannot be flexibly adjusted. The method comprises: determining first precoding indication information and second precoding indication information, the first precoding indication information corresponding to a first-stage precoding matrix, the second precoding indication information corresponding to a direction weighting vector and a phase adjustment factor, the direction weighting vector being used for performing interpolation processing on parts representing angles corresponding to beam vectors in the all beam vectors in each polarization direction in the first-stage precoding matrix, the phase adjusting factor being used for performing phase adjustment on different polarization directions of the first-stage precoding matrix, and the first-stage precoding matrix, the direction weighting vector, and the phase adjustment factor being used for generating a precoding matrix. The resolution of a precoding matrix is flexibly adjusted by using a direction weighting vector.

    CELL MEASUREMENT METHOD AND TERMINAL
    8.
    发明申请
    CELL MEASUREMENT METHOD AND TERMINAL 审中-公开

    公开(公告)号：US20170373772A1

    公开(公告)日：2017-12-28

    申请号：US15539981

    申请日：2015-12-09

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Hui LI ,  Rakesh TAMRAKAR

    IPC: H04B17/318 ,  H04L25/02 ,  H04B7/0452

    Abstract: The present disclosure provides a cell measurement method and a terminal. The cell measurement method includes steps of: measuring a pilot signal from a to-be-measured cell, so as to acquire an channel estimation of N pilot signal transmission ports of the to-be-measured cell, N≧1; determining an equivalent received power corresponding to each precoding matrix in accordance with each precoding matrix in a set of precoding matrices and the channel estimation of the N pilot signal transmission ports of the to-be-measured cell; and determining an equivalent received power of the to-be-measured cell in accordance with the equivalent received power corresponding to each precoding matrix.

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