Patents by Inventor Paul Louis Greene

Paul Louis Greene 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).

  • 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