Patents by Inventor Xiaoqing Xia

Xiaoqing Xia 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).

  • Feedback cancellation system and method
    Patent number: 8081945
    Abstract: A system and method for detecting antenna coupling and for providing feedback cancellation in response to the antenna coupling includes a signal feedback cancellation circuit configured to be coupled between a signal receiver and a signal transmitter. The feedback cancellation circuit is responsive to received signals, amplified signals and the detection of signal coupling between a receiving antenna any transmitting antenna, for providing a feedback cancellation signal to a signal amplifier. The feedback cancellation circuit may employ time domain or frequency domain methods. In the case of a time domain method, the feedback cancellation circuit may further include a White noise generator which serves to the tune or adjust the feedback cancellation circuit.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 20, 2011
    Assignee: Cellular Specialities, Inc.
    Inventors: William J. Crilly, Jr., Xiaoqing Xia
  • FEEDBACK CANCELLATION SYSTEM AND METHOD
    Publication number: 20090197541
    Abstract: A system and method for detecting antenna coupling and for providing feedback cancellation in response to the antenna coupling includes a signal feedback cancellation circuit configured to be coupled between a signal receiver and a signal transmitter. The feedback cancellation circuit is responsive to received signals, amplified signals and the detection of signal coupling between a receiving antenna any transmitting antenna, for providing a feedback cancellation signal to a signal amplifier. The feedback cancellation circuit may employ time domain or frequency domain methods. In the case of a time domain method, the feedback cancellation circuit may further include a White noise generator which serves to the tune or adjust the feedback cancellation circuit.
    Type: Application
    Filed: December 4, 2008
    Publication date: August 6, 2009
    Applicant: Cellular Specialties, Inc.
    Inventors: William J. Crilly, JR., Xiaoqing Xia