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

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 sche...

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Bibliographic Details
Published in:Journal of lightwave technology 2003-02, Vol.21 (2), p.438-446
Main Authors: Vasic, B., Djordjevic, I.B., Kostuk, R.K.
Format: Article
Language:English
Subjects:
Applied sciences
AWGN
Belief propagation
Coding, codes
Decoding
Design engineering
Encoders
Exact sciences and technology
Graphs
Information, signal and communications theory
Iterative algorithms
Iterative decoding
Optical communication
Optical devices
Optical fiber communication
Optical fiber polarization
Optical sensors
Parity
Parity check codes
Performance enhancement
Rectangles
Signal and communications theory
System performance
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary: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.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2003.808769