Reliability-based iterative decoding of LDPC codes using likelihood accumulation

Ming Jiang

doi:10.1109/LCOMM.2007.070450

Reliability-based iterative decoding of LDPC codes using likelihood accumulation

2007-08-01

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AI

DOI：10.1109/LCOMM.2007.070450

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In this work, we present an improvement on low complexity serial concatenation of belief propagation (BP) order statistic decoding (OSD) algorithm for low-density parity-check (LDPC) codes. We introduce a more reliable method to reconstruct ordered information sequence in terms of the accumulated log-likelihood ratio (LLR) transitions of variable nodes. We give a general expression for both the existing BPOSD algorithm and our proposed, new method according to a structure similar to an infinite impulse response (IIR) filter. This improved algorithm achieves noticeable performance gains with only modest increase in computation complexity.

Keyword:

low-density parity-check codes

accumulated log-likelihood ratio

reliability decoding

Reliability-based iterative decoding of LDPC codes using likelihood accumulation

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