Patents by Inventor Rick Galbraith

Rick Galbraith 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).

  • Decoding low density parity check codes
    Patent number: 7000167
    Abstract: A method for decoding Low Density Parity Check (LDPC) codes comprises executing a sum product algorithm to recover a set of information bits from an LDPC code represented as a bipartite graph of symbol nodes and check nodes, the sum product algorithm being responsive to input log likelihood ratios associated with the symbol nodes.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: February 14, 2006
    Assignee: International Business Machines Corporation
    Inventors: Jon Coker, Ajay Dholakia, Evangelos S. Eleftheriou, Rick Galbraith, Thomas Mittelholzer, Sedat Oelcer
  • Decoding low density parity check codes
    Publication number: 20030074626
    Abstract: A method for decoding Low Density Parity Check (LDPC) codes comprises executing a sum product algorithm to recover a set of information bits from an LDPC code represented as a bipartite graph of symbol nodes and check nodes, the sum product algorithm being responsive to input log likelihood ratios associated with the symbol nodes.
    Type: Application
    Filed: January 8, 2002
    Publication date: April 17, 2003
    Applicant: International Business Machines Corporation
    Inventors: Jon Coker, Ajay Dholakia, Evangelos S. Eleftheriou, Rick Galbraith, Thomas Mittelholzer, Sedat Oelcer