Patents by Inventor Thuy V. NGUYEN

Thuy V. NGUYEN 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 order modulation protograph codes
    Patent number: 8832520
    Abstract: Digital communication coding methods for designing protograph-based bit-interleaved code modulation that is general and applies to any modulation. The general coding framework can support not only multiple rates but also adaptive modulation. The method is a two stage lifting approach. In the first stage, an original protograph is lifted to a slightly larger intermediate protograph. The intermediate protograph is then lifted via a circulant matrix to the expected codeword length to form a protograph-based low-density parity-check code.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: September 9, 2014
    Assignees: California Institute of Technology, Board of Regents, The University of Texas System
    Inventors: Thuy V. Nguyen, Aria Nosratinia, Dariush Divsalar
  • Rate-compatible protograph LDPC codes
    Patent number: 8689083
    Abstract: Digital communication coding methods resulting in rate-compatible low density parity-check (LDPC) codes built from protographs. Described digital coding methods start with a desired code rate and a selection of the numbers of variable nodes and check nodes to be used in the protograph. Constraints are set to satisfy a linear minimum distance growth property for the protograph. All possible edges in the graph are searched for the minimum iterative decoding threshold and the protograph with the lowest iterative decoding threshold is selected. Protographs designed in this manner are used in decode and forward relay channels.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: April 1, 2014
    Assignees: California Institute of Technology, Board of Regents, The University of Texas System
    Inventors: Thuy V. Nguyen, Aria Nosratinia, Dariush Divsalar
  • HIGH ORDER MODULATION PROTOGRAPH CODES
    Publication number: 20130139024
    Abstract: Digital communication coding methods for designing protograph-based BICM that is general and applies to any modulation. The general coding framework can support not only multiple rates but also adaptive modulation. The method is a two stage lifting approach. In the first stage, an original protograph is lifted to a slightly larger intermediate protograph. The intermediate protograph is then lifted via a circulant matrix to the expected codeword length to form a protograph-based LDPC code.
    Type: Application
    Filed: November 29, 2011
    Publication date: May 30, 2013
    Inventors: Thuy V. Nguyen, Aria Nosratinia, Dariush Divsalar
  • RATE-COMPATIBLE PROTOGRAPH LDPC CODES
    Publication number: 20110307756
    Abstract: Digital communication coding methods resulting in rate-compatible low density parity-check (LDPC) codes built from protographs. Described digital coding methods start with a desired code rate and a selection of the numbers of variable nodes and check nodes to be used in the protograph. Constraints may be set to satisfy a linear minimum distance growth property for the protograph. All possible edges in the graph are searched for the minimum iterative decoding threshold and the protograph with the lowest iterative decoding threshold is selected. Protographs designed in this manner may be used in decode and forward relay channels.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 15, 2011
    Inventors: Thuy V. NGUYEN, Aria NOSRATINIA, Dariush DIVSALAR