The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2014
Filed:
Jun. 10, 2011
Thuy V. Nguyen, Dallas, TX (US);
Aria Nosratinia, Plano, TX (US);
Dariush Divsalar, Pacific Palisades, CA (US);
Thuy V. Nguyen, Dallas, TX (US);
Aria Nosratinia, Plano, TX (US);
Dariush Divsalar, Pacific Palisades, CA (US);
California Institute of Technology, Pasadena, CA (US);
Board of Regents, The University of Texas System, Austin, TX (US);
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.