Patents by Inventor Mark E. Driedger

Mark E. Driedger 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).

  • Patent number: 5231648
    Abstract: The present invention provides a method of estimating parameters of a mobile radio channel which are used for providing the equalization and synchronization of the radio channel. The channel is modelled as a discrete number of independent Rayleigh-faded propagation paths. First, the relative delay of each path is estimated, using maximum likelihood methods. Using this information, the associated time-varying path weights are then determined using a least-squares fit. This is sufficient information to estimate the impulse response of the channel. The actual equalizer weights are then obtained by inverting the estimated channel impulse response.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: July 27, 1993
    Assignee: Northern Telecom Limited
    Inventors: Mark E. Driedger, James P. Reilly, Blake S. Toplis