Patents by Inventor Michael John Wingrove

Michael John Wingrove 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).

  • Adaptive front end for discrete multitone modem
    Patent number: 6693957
    Abstract: An adaptive DMT modem determines, as part of a startup sequence, subscriber loop conditions. One or more loop condition adaptation operations are then performed to reduce the complexity of the filters employed in the modem, to reduce the power dissipated in the modem, to optimize performance of the modem or to reduce the likelihood of EMI being radiated into the premises of a subscriber.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: February 17, 2004
    Assignee: Nortel Networks Limited
    Inventors: Michael John Wingrove, Alberto Ginesi, Gwendolyn Kate Harris, Robert Scott McClennon
  • Method and apparatus for time-domain equalization in FDM-based discrete multi-tone modems
    Patent number: 6404806
    Abstract: A time domain equalizer for a discrete multi-tone modem that includes an estimation of the contribution of out of band noise and echo to the overall channel impulse response. At start up the modem estimates out of band noise and echo. Using a minimum mean square error analysis, the time domain equalizer taps can be determined, taking into account the estimated out of band contribution. As a result, less complex duplexing filters, and time domain equalizer, are required.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: June 11, 2002
    Assignee: Nortel Networks Limited
    Inventors: Alberto Ginesi, Christian Bourget, Michael John Wingrove