Patent · US Active

Method and system for providing long and short block length low density parity check (LDPC) codes

US7376883B2 · kind B2 · utility

26Cited by
4References
13Claims
0Family size

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Key dates

Filing dateOct 22, 2004
Grant dateMay 20, 2008
Priority date—
Expiry dateJul 29, 2026

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03M13/152
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For ⅓ rate, the relevant parameters are as follows: q=120, nldpc=64,800, kldpc=nBCH=21600, kBCH=21408 (12 bit error correcting BCH). For ¼ rate, the LDPC code has the following relevant parameters: q=135, nldpc=64,800, kldpc=nBCH=16200, kBCH=16008 (12 bit error correcting BCH). For ⅖ rate, the following parameters exist: q=108, nldpc=64800, kldpc=nBCH=25920, kBCH=25728 (12 bit error correcting BCH). The above approach has particular application in digital video broadcast services over satellite.

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