Patents by Inventor Gregory Alan Gibbons

Gregory Alan Gibbons 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).

  • Polarization diversity detector mask selection algorithm
    Patent number: 6989903
    Abstract: A method for selecting a cell from each member of a tri-cell photodetector array used to detect optical signals output from a multichannel sensor array to indicate interference between two optical signals of unknown polarization incident upon the tri-cell photodetector array comprises selecting a cell in each tri-cell photodetector and collecting a selected number of samples of the signal output for each cell. Each sample has an in-phase AC component I and a quadrature AC component Q. An amplitude sum signal E=I*I+Q*Q is calculated for a predetermined number of samples in the selected number of samples of the signal output for each cell. The signal output of cell in each tri-cell photodetector having the largest value of the amplitude sum signal is selected for further processing.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: January 24, 2006
    Assignee: Northrop Grumman Corporation
    Inventors: William Christopher Knaack, Gregory Alan Gibbons
  • Multichannel interferometer with phase generated carrier demodulation and quadrature error correction
    Patent number: 6825714
    Abstract: Apparatus for eliminating sign uncertainty in a coherent phase generated carrier demodulator in a multi-channel sensor system has a downconverter array arranged to separate the in-phase component I and the quadrature phase component of the sensor output for each channel. A coordinate transformer uses the in-phase component and quadrature phase component to calculate an arctangent for the phase angle for each channel. A digital signal processor adds 180° to each arctangent calculation for which the tangent is a negative number.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: November 30, 2004
    Assignee: Litton Systems, Inc.
    Inventors: Paul Louis Greene, William Christopher Knaack, Gregory Alan Gibbons
  • Multichannel interferometer with phase generated carrier demodulation and quadrature error correction
    Publication number: 20040145798
    Abstract: Apparatus for eliminating sign uncertainty in a coherent phase generated carrier demodulator in a multi-channel sensor system has a downconverter array arranged to separate the in-phase component I and the quadrature phase component of the sensor output for each channel. A coordinate transformer uses the in-phase component and quadrature phase component to calculate an arctangent for the phase angle for each channel. A digital signal processor adds 180° to each arctangent calculation for which the tangent is a negative number.
    Type: Application
    Filed: January 22, 2003
    Publication date: July 29, 2004
    Inventors: Paul Louis Greene, William Christopher Knaack, Gregory Alan Gibbons
  • Polarization diversity detector mask selection algorithm
    Publication number: 20040068384
    Abstract: A method for selecting a cell from each member of a tri-cell photodetector array used to detect optical signals output from a multichannel sensor array to indicate interference between two optical signals of unknown polarization incident upon the tri-cell photodetector array comprises selecting a cell in each tri-cell photodetector and collecting a selected number of samples of the signal output for each cell. Each sample has an in-phase AC component I and a quadrature AC component Q. An amplitude sum signal E=I*I+Q*Q is calculated for a predetermined number of samples in the selected number of samples of the signal output for each cell. The signal output of cell in each tri-cell photodetector having the largest value of the amplitude sum signal is selected for further processing.
    Type: Application
    Filed: May 6, 2003
    Publication date: April 8, 2004
    Inventors: William Christopher Knaack, Gregory Alan Gibbons