Low-density parity check codes and iterative decoding for long-haul optical communication systems

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88 Scopus citations

Abstract

A forward-error correction (FEC) scheme based on low-density parity check (LDPC) codes and iterative decoding using belief propagation in code graphs is presented in this paper. We show that LDPC codes provide a significant system performance improvement with respect to the state-of-the-art FEC schemes employed in optical communications systems. We present a class of structured codes based on mutually orthogonal Latin rectangles. Such codes have high rates and can lend themselves to very low-complexity encoder/decoder implementations. The system performance is further improved by a code design that eliminates short cycles in a graph employed in iterative decoding.

Original languageEnglish (US)
Pages (from-to)438-446
Number of pages9
JournalJournal of Lightwave Technology
Volume21
Issue number2
DOIs
StatePublished - Feb 2003

Keywords

  • Balanced incomplete block designs (BIBDs)
  • Belief propagation algorithm
  • Forward-error correction (FEC)
  • Long-haul transmission
  • Low-density parity check (LDPC) codes
  • Optical communications

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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