Patents by Inventor Kenneth S. Andrews

Kenneth S. Andrews 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).

  • OPTICAL COMMUNICATION SYSTEMS
    Publication number: 20170222720
    Abstract: A receiver, transmitter, and photon counting detector for use in an optical communication link are disclosed. Also disclosed are methods of communicating using the transmitter, the receiver, and the photon detector.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 3, 2017
    Applicant: California Institute of Technology
    Inventors: William H. Farr, Meera Srinivasan, Kenneth S. Andrews, Andre Wong
  • Encoders for block-circulant LDPC codes
    Patent number: 7499490
    Abstract: Methods and apparatus to encode message input symbols in accordance with an accumulate-repeat-accumulate code with repetition three or four are disclosed. Block circulant matrices are used. A first method and apparatus make use of the block-circulant structure of the parity check matrix. A second method and apparatus use block-circulant generator matrices.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: March 3, 2009
    Assignees: California Institute of Technology, The Regents of the University of California
    Inventors: Dariush Divsalar, Aliazam Abbasfar, Christopher R. Jones, Samuel J. Dolinar, Jeremy C. Thorpe, Kenneth S. Andrews, Kung Yao
  • ARA type protograph codes
    Patent number: 7343539
    Abstract: An apparatus and method for encoding low-density parity check codes. Together with a repeater, an interleaver and an accumulator, the apparatus comprises a precoder, thus forming accumulate-repeat-accumulate (ARA codes). Protographs representing various types of ARA codes, including AR3A, AR4A and ARJA codes, are described. High performance is obtained when compared to the performance of current repeat-accumulate (RA) or irregular-repeat-accumulate (IRA) codes.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: March 11, 2008
    Assignee: The United States of America as represented by the United States National Aeronautics and Space Administration
    Inventors: Dariush Divsalar, Aliazam Abbasfar, Christopher R. Jones, Samuel J. Dolinar, Jeremy C. Thorpe, Kenneth S. Andrews, Kung Yao