Patents by Inventor Andrew Donovan Smith

Andrew Donovan Smith 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).

  • High speed differential encoder and interleaver
    Patent number: 7929640
    Abstract: A plurality of differential encoders encodes a plurality of parallel data bit streams. XOR gates interleave the outputs of the differential encoders forming a single high speed differentially encoded bit stream with a data rate that is the sum of the data rate of the parallel data bit streams. The high speed data stream provides a single differentially encoded input to a differential phase shift keying modulator that generates symbols for a high speed optical communication system.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: April 19, 2011
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Andrew Donovan Smith, Gerald R. Fischer
  • HIGH SPEED DIFFERENTIAL ENCODER AND INTERLEAVER
    Publication number: 20080112507
    Abstract: A plurality of differential encoders encodes a plurality of parallel data bit streams. XOR gates interleave the outputs of the differential encoders forming a single high speed differentially encoded bit stream with a data rate that is the sum of the data rate of the parallel data bit streams. The high speed data stream provides a single differentially encoded input to a differential phase shift keying modulator that generates symbols for a high speed optical communication system.
    Type: Application
    Filed: November 15, 2006
    Publication date: May 15, 2008
    Inventors: Andrew Donovan Smith, Gerald R. Fischer