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A Systolic LLR Generation Architecture for Non-Binary LDPC Decoders

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2 Author(s)
Ghouwayel, A.A. ; Lab. STICC, Univ. Europeenne de Bretagne, Lorient, France ; Boutillon, E.

Non-Binary LDPC codes offer higher performances than their binary counterpart but suffer from higher decoding complexity. A solution to reduce the decoding complexity is to use the Extended Min-Sum algorithm. The first step of this algorithm requires the generation of the first n_m largest Log-Likelihood Ratio (LLR), sorted in increasing order, of each received symbol. In the case where GF(q) symbols are transmitted using a BPSK modulation, we propose a simple systolic architecture that generates the sorted list of symbols.

Published in:

Communications Letters, IEEE  (Volume:15 ,  Issue: 8 )

Date of Publication:

August 2011

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