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.
[IEEE ]
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