Enhancing Binary Images of Non-Binary LDPC Codes

Details Enhancing Binary Images of Non-Binary LDPC Codes Enhancing Binary Images of Non-Binary LDPC Codes

2011-10-27

arxiv.org/abs/1110.6199v1

Computer Science

Information Theory

6 pages, 2 figures, to be presented at IEEE GLOBECOM 2011

Scientific paper

We investigate the reasons behind the superior performance of belief propagation decoding of non-binary LDPC codes over their binary images when the transmission occurs over the binary erasure channel. We show that although decoding over the binary image has lower complexity, it has worse performance owing to its larger number of stopping sets relative to the original non-binary code. We propose a method to find redundant parity-checks of the binary image that eliminate these additional stopping sets, so that we achieve performance comparable to that of the original non-binary LDPC code with lower decoding complexity.

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