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Subject: search.filters.subject.LUT-based decoder

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    Design of Lookup-Table (LUT) Decoder for Protograph-Based Low-Density Parity-Check (LDPC) codes
    (2022-01-01)
    Duangthong, Chatuporn
    ;
    Phakphisut, Watid
    The Belief-propagation (BP) algorithm is a powerful decoder for LDPC codes. However, the BP algorithm requires the high complexity of the check node operation. Therefore, in the previous works, a lookup table (LUT)-based decoder has been proposed for LDPC codes. In this work, we propose the LUT design for protograph LDPC codes. Our LUT design can support the parallel edge, variable node with degree-1 and punctured variable node. As a result, the coding losses of 2-, 3-and 4-bit quantization of LUT decoder are 1.6, 0.5 and 0.1 dB compared to BP algorithm.
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    Joint design of channel output quantizer and LUT-Based LDPC decoder
    (2021-05-19)
    Duangthong, Chatuporn
    ;
    Supnithi, Pornchai
    ;
    Phakphisut, Watid
    Recently, the LUT-based LDPC decoder has been designed by maximizing mutual information, where the performances of channel output quantizer and LUT-based decoder are considered separately. In this work, we propose the joint design of the channel output quantizer and LUT-based decoder. Our joint design aims to minimize the error probability of LDPC decoding through the density evolution algorithm. We found that the joint design outperforms the previous work at the waterfall region.