Serial LDPC decoding on a SIMD DSP using horizontal scheduling

Serial LDPC decoding on a SIMD DSP using horizontal scheduling
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DOI:
10.5281/zenodo.39462
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发表时间:
2006-09
期刊:
2006 14th European Signal Processing Conference
影响因子:
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通讯作者:
M. Gomes;V. Silva;C. Neves;Ricardo Marques
M. Gomes;V. Silva;C. Neves;Ricardo Marques
中科院分区:
其他
文献类型:
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作者:
M. Gomes;V. Silva;C. Neves;Ricardo Marques

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在本文中,我们提出了一种基于最小和算法和水平调度方法的高效矢量化低密度奇偶校验(LDPC)解码方案。此外,检查节点消息更新中使用的众所周知的前向-后向算法也得到了改进。给出了在高性能和现代定点 DSP 上表示 32 位和 16 位对数似然比消息的结果。在 16 位情况下探索了单指令多数据 (SIMD) 功能。规则代码和不规则代码都被考虑。
In this paper we propose an efficient vectorized low density parity check (LDPC) decoding scheme based on the min-sum algorithm and the horizontal scheduling method. Also, the well known forward-backward algorithm, used in the check-node messages update, is improved. Results are presented for 32 and 16 bits logarithm likelihood ratio messages representation on a high performance and modern fixed point DSP. The single instruction multiple data (SIMD) feature was explored in the 16 bits case. Both regular and irregular codes are considered.