Patents by Inventor Qingwen Liu

Qingwen Liu 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).

  • Publication number: 20080089274
    Abstract: The present invention discloses a method for wireless communications network performance in transmitting a message. The method comprises creating a first beamformed virtual antenna for the serving BTS and one or more second beamformed virtual antennas for the one or more target BTSs when one or more predetermined conditions are met, establishing a first beamformed channel by using the first beamformed virtual antenna, establishing one or more second beamformed channels by using the one or more second beamformed virtual antennas, and transmitting a plurality of signals comprising the message via the first and the one or more second beamformed channels.
    Type: Application
    Filed: May 2, 2007
    Publication date: April 17, 2008
    Inventors: Qingwen Liu, Hang Jin
  • Publication number: 20080020785
    Abstract: The present invention discloses a system for detecting locations of a customer premises equipment in a wireless communication system with one or more base transceiver stations and one is efficient. A plurality of antennas in a base transceiver station receives signals transmitted from a customer premises equipment. A timing detection module extracts the timing offset from the receiving signals and a first calculation module calculates the distance between the BTS and the CPE based on the timing offset. A signal detection module detects magnitudes and phases of the receiving signals and a second calculation module determines a dominant beam according to the antenna pattern and calculates the direction of arrival of the dominant beam. A third calculation module calculates the location of the CPE relative to the base transceiver station based on the distance and the direction of arrival.
    Type: Application
    Filed: April 12, 2007
    Publication date: January 24, 2008
    Inventors: Qingwen Liu, Hang Jin, Weiguo Xie, John Grabner
  • Publication number: 20030224649
    Abstract: An electrical connector assembly formed using an overmolding process. The electrical connector assembly includes a body which houses spring contacts, a spring mechanism, and terminals opposite to the spring contacts. The body is enclosed with a and protector which is defined by an upper portion and a lower portion. The upper and lower portions are cooperatively engaged to provide structural protection during the overmolding process and sealing protection as well.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 4, 2003
    Inventors: Fidel P. Vista, Cesar Calma, QingWen Liu