Patents by Inventor Yi-Hsu Wang

Yi-Hsu Wang 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).

  • Fine frequency offset estimation and calculation and use to improve communication system performance
    Patent number: 7123670
    Abstract: A method for correcting influence of frequency offset between a receiver and a transmitter by evaluating training symbols received during a preamble period. The method includes producing, based on at least one long training symbol, a first vector whose first vector angle is indicative of a fine offset between the receiver and the transmitter, producing a fine offset estimate based on the first vector angle, and multiplying, with a signal having a frequency based upon the fine offset estimate, data symbols that are received after the at least one long training symbol is received.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: October 17, 2006
    Assignee: Atheros Communications, Inc.
    Inventors: Jeffrey M. Gilbert, Teresa H. Meng, John Thomson, Yi-Hsu Wang
  • Post-FFT scaling to reduce multiple effects
    Patent number: 7088787
    Abstract: A method of scaling at a receiver representations of training signals received from a transmitter. The method includes producing a frequency domain representation of at least one long training symbol received at the receiver and a frequency domain representation of a data symbol, and scaling the frequency domain representation of the at least one long symbol based on a largest coefficient in the frequency domain representation to produce a scaled frequency domain representation of the at least one long symbol.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: August 8, 2006
    Assignee: Atheros Communications, Inc.
    Inventors: Yi-Hsu Wang, Jeffrey M. Gilbert
  • Fine frequency offset estimation and calculation and use to improve communication system performance
    Publication number: 20030058966
    Abstract: A method for correcting influence of frequency offset between a receiver and a transmitter by evaluating training symbols received during a preamble period. The method includes producing, based on at least one long training symbol, a first vector whose first vector angle is indicative of a fine offset between the receiver and the transmitter, producing a fine offset estimate based on the first vector angle, and multiplying, with a signal having a frequency based upon the fine offset estimate, data symbols that are received after the at least one long training symbol is received.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Inventors: Jeffrey M. Gilbert, Teresa H. Meng, John Thomson, Yi-Hsu Wang