Patent · US Active

Method and device for controlling the decoding of a LDPC encoded codeword, in particular for DVB-S2 LDPC encoded codewords

US8010869B2 · kind B2 · utility

29Cited by

2References

25Claims

0Family size

Assignee

STMICROELECTRONICS N.V. · NL

Inventors

Norbert Wehn · Queidersbach, DE
Frank Kienle · Edenkoben, DE
Torben Brack · Kaiserslautern, DE

Key dates

Filing date	Apr 27, 2006
Grant date	Aug 30, 2011
Priority date	—
Expiry date	Jan 14, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/1165
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

This is a method for controlling the decoding of a LDPC encoded codeword composed of several digital data, said LDPC code being represented by a bipartite graph between check nodes (CN1) and variable nodes (VNi). Said method comprises updating messages exchanged iteratively between variable nodes (VN1) and check nodes (CN1). Said method comprises, at each iteration, calculating for each variable node a first sum (Λn) of all the incident messages (λi) received by said variable node and the corresponding digital data (λch) and calculating a second sum (VNRnew) of all the absolute values of the first sums (Λn), and stopping the decoding process if the second sum (VNRnew) is unchanged or decreases within two successive iterations and if a predetermined threshold condition is satisfied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.