Patents by Inventor Richard L. Udd

Richard L. Udd 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).

  • Method and apparatus for pulse sorting
    Patent number: 5091917
    Abstract: A method and apparatus for associating received pulses with one of a plurality of emitters emitting pulses at periodic intervals. Periodic pulse trains are detected by computing the difference in arrival times between each received pulse and a fixed number of previously received pulses. In the simplest embodiment, a periodic pulse train is detected when one of the computed differences is one-half of another computed difference. In other embodiments, further processing is performed to detect staggered pulse trains or other periodic patterns.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: February 25, 1992
    Assignee: Raytheon Company
    Inventors: Richard L. Udd, James C. Robertson