Patents by Inventor Michael J. Fairfield

Michael J. Fairfield 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).

  • Data transmission systems
    Patent number: 4484338
    Abstract: A method and apparatus for decoding received data signals using a Viterbi algorithm. To reduce the time required to decode a data signal, the system expands k received data vectors into nk vectors where n is smaller than m, m being the number of levels of the received data signal. Thereafter, k vectors are chosen from the nk expanded vectors and a "cost", defined herein is determined for each of said k vectors. The most likely identity of the received data signal is then determined on the basis of the computed costs.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: November 20, 1984
    Assignee: Plessey Overseas Limited
    Inventors: Adrian P. Clark, Michael J. Fairfield