E-IHRB Decoder Architectures for Non-Binary LDPC Codes
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2014, Vol 3, Issue 8
Abstract
In the information theory, the non- binary low density parity check (NB-LDPC) code is a linear error correcting code, a method of transmitting message over a noisy transmission channel. LDPCcodes are capacityapproaching codes, which means that practical constructions exist that allow the noise threshold to be set very close to the theoretical maximum for a symmetric memory less channel.Using iterative belief propagation techniques, NB-LDPC codes can be decoded in time linear to their block length. Non-binary lowdensity parity-check codes can achieve higher performance than their binary counterparts. Recently, two algorithms were developed for decoding NB-LDPC codes: iterative hard reliability-based majority-logic decoding (IHRB-MLGD) and iterative soft reliability-based majority-logic decoding (ISRB-MLGD has better performance-complexity tradeoffs than previous algorithms. This paper first proposes message-passing in such a way that we can reduce the memory consumption to a greater extent at the same time there should not be performance loss. By using enhanced iterative reliabilitybased majority-logic decoding algorithms we can achieve effective complexity-performance and noise free design. Compared to previous designs, our proposed decoders have at least tens of times lower complexity with moderate coding gain loss.
Authors and Affiliations
Kalyani Madamsetti, Suseela M
Keywords
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