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    Precoding matrix indication method, terminal, and network side device
    42.
    发明授权
    Precoding matrix indication method, terminal, and network side device 有权

    公开(公告)号：US11336339B2

    公开(公告)日：2022-05-17

    申请号：US16608154

    申请日：2018-04-17

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Rakesh Tamrakar ,  Qiubin Gao ,  Hui Li

    IPC: H04B7/0456 ,  H04L1/00 ,  H04W72/04 ,  H04W72/12

    Abstract: Provided in the present disclosure are a precoding matrix indication method, a terminal, and a network device, the method includes: receiving, by a terminal, a control signaling transmitted from a network side device, wherein the control signaling includes N bits of precoding information, and the N is a positive integer; determining, by the terminal, a quantity of precoding granules according to a scheduling resource, and determining, by the terminal, bits of the precoding information of each of the precoding granules in the N bits of precoding information according to the quantity of the precoding granules, wherein each of the precoding granules includes at least one subband, and each of the at least one subband includes at least one PRB; and acquiring, by the terminal, a precoding matrix indicated by the bits of the precoding information of each of the precoding granules.

    CSI information reporting and receiving method and communication device
    44.
    发明授权
    CSI information reporting and receiving method and communication device 有权

    公开(公告)号：US11218277B2

    公开(公告)日：2022-01-04

    申请号：US16645524

    申请日：2018-06-28

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Hui Li ,  Qiubin Gao ,  Tamrakar Rakesh ,  Runhua Chen ,  Xin Su ,  Deshan Miao ,  Qiuping Huang ,  Mengjun Wang

    IPC: H04L5/00

    Abstract: Provided in the embodiments of the present application are a channel state indication (CSI) information reporting and receiving method and a communication device, which are used to provide for a terminal in an NR system a solution for mapping CSI information to an uplink channel and transmitting the same. The method comprises: a terminal receives an uplink channel resource configuration signaling and/or a demodulation reference signal (DMRS) configuration signaling sent by a base station, and determines a mapping symbol set, wherein the DMRS configuration signaling is used to indicate the number of DMRSes configured by a system for an uplink channel and the time-frequency location of an occupied OFDM symbol, the uplink channel resource configuration signaling represents the time-frequency resource of the uplink channel, and the mapping symbol set is a set of symbols adjacent to the OFDM symbol; and the terminal measures a downlink channel, calculates CSI information, encodes the CSI information, and maps an information part comprising rank indication (RI) information onto an RE of at least one orthogonal frequency-division multiplexing (OFDM) symbol in the mapping symbol set to carry out transmission.

    Method for transmitting a reference signal, method for determining phase noise and related apparatuses
    48.
    发明授权
    Method for transmitting a reference signal, method for determining phase noise and related apparatuses 有权

    公开(公告)号：US10659119B2

    公开(公告)日：2020-05-19

    申请号：US16475072

    申请日：2017-08-25

    Applicant: China Academy of Telecommunications Technology

    Inventor： Hui Li ,  Qiubin Gao ,  Xin Su ,  Tamrakar Rakesh ,  Runhua Chen ,  Qiuping Huang ,  Chuanjun Li ,  Mengjun Wang

    IPC: H04L27/26 ,  H04B7/0456 ,  H04L25/02

    Abstract: The present invention relates to the field of wireless communications, and in particular, to a method for transmitting a reference signal, a method for determining a phase noise, and related apparatuses, to resolve the problem in the prior art that different phase noises of different antenna units or antenna ports of a transmitter cannot be accurately estimated and compensated for. The method comprises: the transmitter respectively transmitting each precoded DMRS and PTRS to a receiver via respective corresponding antenna groups having a same phase noise, and when the receiver receives the PTRS, performing channel estimation based on each received PTRS, to determine phase changes caused by phase noises corresponding to different antenna groups. In this way, even if different antennas of a transmitter have different phase noises, phase changes caused by the different phase noises can still be accurately determined, so that all data transmitted by the different antenna groups can be accurately demodulated according to different phase changes.

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