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Check node processing dominates the complexity of nonbinary LDPC decoding. Trellis based min-max algorithm[1] can reduce the computation complexity and generate the message from check node to variable node in parallel. In this paper, power representation is used to implement check node processor, adder structures over GF(q) using power representation in trellis based check node processing are proposed...
Compared to binary low-density parity-check (LDPC) codes, nonbinary (NB) LDPC codes can achieve higher coding gain when the codeword length is moderate, but at the cost of higher decoding complexity. One major bottleneck of NB-LDPC decoding is the complicated check node processing. In this paper, a novel relaxed check node processing scheme is proposed for the min-max NB-LDPC decoding algorithm. Each...
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