Patents by Inventor Xitao Dai

Xitao Dai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Antenna calibration method and apparatus
    Patent number: 10812159
    Abstract: Embodiments of this application provide an antenna calibration method and apparatus. In the method, for a first antenna unit and a second antenna unit, candidate phase compensation coefficients used for antenna calibration are determined based on channel responses indicating that a first calibration signal sent by the first antenna unit is received by the first antenna unit and the second antenna unit and channel responses indicating that a second calibration signal sent by the second antenna unit is received by the first antenna unit and the second antenna unit; and a phase compensation coefficient is selected from the candidate phase compensation coefficients based on measurement on an uplink signal sent by user equipment.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: October 20, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jiesheng Huang, Xiangyang Liu, Jian Min, Guichun Zhuang, Xitao Dai, Guochen Liu
  • ANTENNA CALIBRATION METHOD AND APPARATUS
    Publication number: 20190349048
    Abstract: Embodiments of this application provide an antenna calibration method and apparatus. In the method, for a first antenna unit and a second antenna unit, candidate phase compensation coefficients used for antenna calibration are determined based on channel responses indicating that a first calibration signal sent by the first antenna unit is received by the first antenna unit and the second antenna unit and channel responses indicating that a second calibration signal sent by the second antenna unit is received by the first antenna unit and the second antenna unit; and a phase compensation coefficient is selected from the candidate phase compensation coefficients based on measurement on an uplink signal sent by user equipment.
    Type: Application
    Filed: July 23, 2019
    Publication date: November 14, 2019
    Inventors: Jiesheng HUANG, Xiangyang LIU, Jian MIN, Guichun ZHUANG, Xitao DAI, Guochen LIU
  • Method and base station for selecting working remote radio unit for user equipment
    Patent number: 9173118
    Abstract: The present invention provides a method for selecting a working remote radio unit for a user equipment. By comparing isolation of a current working RRU set of a user equipment with a preset isolation threshold, resource utilization and signal interference can be effectively balanced and a working remote radio unit of the user equipment can be accurately determined.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: October 27, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bo Wang, Li Li, Xitao Dai, Lihua Wu
  • Method and Base Station for Selecting Working Remote Radio Unit for User Equipment
    Publication number: 20140187254
    Abstract: The present invention provides a method for selecting a working remote radio unit for a user equipment. By comparing isolation of a current working RRU set of a user equipment with a preset isolation threshold, resource utilization and signal interference can be effectively balanced and a working remote radio unit of the user equipment can be accurately determined.
    Type: Application
    Filed: November 15, 2013
    Publication date: July 3, 2014
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Bo Wang, Li Li, Xitao Dai, Lihua Wu