Patents by Inventor Michael P. Chen

Michael P. Chen 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).

  • Trellis precoding for fractional bits/baud
    Patent number: 5214672
    Abstract: A digital data sequence is mapped into a signal point sequence e(D) for data transmission over a channel h(D) to produce a channel output sequence y(D)=e(D)h(D). e(D) is chosen so that the signal points in the sequence y(D) belong to a class of possible sequences based on the digital data sequence, the class being based on a time-varying trellis code derived from an N-dimensional time-invariant trellis code by using different transformed versions of its underlying lattices for respectively different N-dimensional symbols.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: May 25, 1993
    Assignee: Codex Corporation
    Inventors: Vedat Eyuboglu, Michael P. Chen