Patents by Inventor Qunying Wu

Qunying Wu 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).

  • Method, system and apparatus for uplink space transmission of TDD system
    Patent number: 8295213
    Abstract: A method for uplink transmission based on a time division duplex (TDD) system is provided. In the method, a terminal measures downlink channel state information, estimates the state information of the uplink spatial channel using the channel reciprocity of the TDD system, and selects an uplink spatial pre-coding matrix using the state information of the uplink spatial channel based on a certain criterion, the terminal executes spatial pre-coding using the selected pre-coding matrix, and transmits the data stream to a base station via terminal transmit antennae. A terminal, a base station and a system which are based on the method are also provided. The invention uses the reciprocity of the TDD system channel fully to achieve the maximal channel capacity, thereby optimizes the uplink spatial-transmission.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: October 23, 2012
    Assignee: China Academy of Telecommunications Technology
    Inventors: Qunying Wu, Shaohui Sun, Shiqiang Suo
  • METHOD, SYSTEM AND APPARATUS FOR UPLINK SPACE TRANSMISSION OF TDD SYSTEM
    Publication number: 20100278059
    Abstract: A method for uplink transmission based on a time division duplex (TDD) system is provided. In the method, a terminal measures downlink channel state information, estimates the state information of the uplink spatial channel using the channel reciprocity of the TDD system, and selects an uplink spatial pre-coding matrix using the state information of the uplink spatial channel based on a certain criterion, the terminal executes spatial pre-coding using the selected pre-coding matrix, and transmits the data stream to a base station via terminal transmit antennae. A terminal, a base station and a system which are based on the method are also provided. The invention uses the reciprocity of the TDD system channel fully to achieve the maximal channel capacity, thereby optimizes the uplink spatial'transmission.
    Type: Application
    Filed: September 5, 2008
    Publication date: November 4, 2010
    Inventors: Qunying Wu, Shaohui Sun, Shigiang Suo