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电子学报  2015 

基于大数逻辑可译LDPC码的译码算法研究

DOI: 10.3969/j.issn.0372-2112.2015.06.019, PP. 1169-1173

Keywords: LDPC码,迭代译码,大数逻辑,非均匀量化

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Abstract:

本文提出两种基于可靠度的迭代大数逻辑译码算法,从以下两个方面降低译码复杂度:(1)校验节点使用伴随式信息处理,可节省外信息的计算操作;(2)变量节点使用伴随信息进行总信息的投票计数过程.结合非均匀量化技术,接收信号在判决门限附近获得更加精细的处理.此外,本文利用量化参数和列重比例信息对可靠度偏移方向和幅度进行了设计.仿真实验表明,本文提出的算法能够在很低的量化比特(3~4bits)下有效工作,具有优良的译码性能和快速的收敛速度.

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