Patents by Inventor D. Damian N. Bevan

D. Damian N. Bevan 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).

  • Scattered pilot and filtering for channel estimation
    Patent number: 7436757
    Abstract: Methods of improving channel estimation are described, in which pilot symbols are inserted into orthogonal frequency division multiplexing (OFDM) frames at an OFDM transmitter having at least one transmitting antenna, wherein for the or each antenna, historical data regarding channel conditions is obtained so that the scattered pilot symbols are inserted in a scattered pattern dependent upon said historical data. Alternatively, or in addition, an adaptive channel estimation filter is used whose parameters are selected according to analysis of historical data regarding channel conditions.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: October 14, 2008
    Assignee: Nortel Networks Limited
    Inventors: Keith S Wilson, D. Damian N. Bevan