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电网技术  2014 

适用于低压电力线通信的BP译码优化方法

DOI: 10.13335/j.1000-3673.pst.2014.10.033, PP. 2828-2832

Keywords: 电力线通信,RA码,置信传播算法,信道编解码,Middleton,A类模型

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Abstract:

为提高低压配网电力线信道中的信息传输效率,提出一种优化BP译码的改进4折线算法。通过变换化简置信传播(beliefpropagation,BP)算法的校验节点信息更新函数,建立分段线性函数,并设计误差修正表对不同分段区间进行补偿,利用查表方法实现误差修正值,可降低解码实现复杂度。在MiddletonA类电力线信道模型下的仿真结果表明,经分段线性函数优化后的译码算法与BP算法的误码率(biterrorrate,BER)性能相近,而译码的复杂度却大大降低,有利于算法的软硬件实现,为电力线载波通信提供了一种高性能的信道编码方案。

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