Patents by Inventor Xiaodan Gan

Xiaodan Gan 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 for reducing channel estimation error in an OFDM system
    Patent number: 7260055
    Abstract: A method for channel response estimation for an OFDM communication system based on a certain normal training symbols plus one virtual training symbol begins with receiving at least one preamble symbol of a transmitted data frame. A first channel state information is estimated from the at least one preamble symbol. At least one signalling symbol is then received and equalized and a rate factor and a length factor are extracted from the at least one signalling symbol. A virtual training symbol is formed from the rate factor and the length factor. A second channel state information is estimated from the at least one preamble symbol and the virtual training symbol. The data symbols are equalized by performing channel correction on data symbols with the second channel estimation and pilot sub-carriers in each of the plurality of data symbols.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 21, 2007
    Assignee: Agency for Science, Technology, and Research
    Inventors: Zhongjun Wang, Lee Guek Yeo, Xiaodan Gan
  • Method for reducing channel estimation error in an OFDM system
    Publication number: 20040240376
    Abstract: A method for channel response estimation for an OFDM communication system based on a certain normal training symbols plus one virtual training symbol begins with receiving at least one preamble symbol of a transmitted data frame. A first channel state information is estimated from the at least one preamble symbol. At least one signalling symbol is then received and equalized and a rate factor and a length factor are extracted from the at least one signalling symbol. A virtual training symbol is formed from the rate factor and the length factor. A second channel state information is estimated from the at least one preamble symbol and the virtual training symbol. The data symbols are equalized by performing channel correction on data symbols with the second channel estimation and pilot sub-carriers in each of the plurality of data symbols.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Applicant: Agency For Science, Technology and Research
    Inventors: Zhongjun Wang, Lee Guek Yeo, Xiaodan Gan