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:
Jul. 31, 2007
Filed:
Mar. 17, 2004
Alexei Ashikhmin, Morristown, NJ (US);
Gerhard Guenter Theodor Kramer, Bedminster, NJ (US);
Stephan Ten Brink, Irvine, CA (US);
Alexei Ashikhmin, Morristown, NJ (US);
Gerhard Guenter Theodor Kramer, Bedminster, NJ (US);
Stephan Ten Brink, Irvine, CA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Techniques and systems for design and use of generalized LDPC codes. A generalized LDPC code comprises a set of codewords producing valid results when submitted to a validator comprising a set of variable nodes and a set of check nodes, with outputs of the variable nodes being connected to inputs of the check nodes by interleaver edges. Each check node and variable node is in the form of a code, with the output of a node being valid if its inputs form a valid codeword. An extrinsic information transfer function (EXIT) chart is used to form a check node curve and a variable node curve is matched to the check node curve. The variable nodes are then constructed so as to provide the information transfer properties indicated by the variable node curve.