基于最小均方误差的改进型IRA译码算法研究  

Research on modified IRA decoding algorithm based on minimum mean square error

作　　者：张天瑜[1] 

机构地区：[1]无锡市广播电视大学机电工程系,江苏无锡214011

出　　处：《长春工业大学学报》2010年第1期42-47,共6页Journal of Changchun University of Technology

摘　　要：IRA码的译码通常是利用BP译码算法来实现的,但是BP译码算法的硬件电路复杂。虽然最小和译码算法能够简化BP译码算法,但它是以牺牲性能为代价的。为了让译码算法在复杂度和译码性能之间取得较好的折衷,根据最小均方误差准则,提出一种改进型IRA译码算法。仿真结果表明,与BP译码算法相比,改进型IRA译码算法能够在降低算法复杂度的同时保持良好的译码性能,与最小和译码算法相比,改进型IRA译码算法的复杂度几乎不变,但译码性能得到了明显地提高。BP decoding algorithm is usually used to realize decoding of IRA codes,but the hardware circuit of BP decoding algorithm is complicated.Minimum-sum decoding algorithm can simplify BP decoding algorithm,but it is achieved by sacrificing performance.According to minimum mean square error rule,a modified IRA decoding algorithm is proposed in order to have a good tradeoff between complexity and decoding performance.The simulation results show that,compared with BP decoding algorithm,the modified IRA decoding algorithm can decrease algorithm complexity and keep good decoding performance.Compared with minimum-sum decoding algorithm,the complexity of the modified IRA decoding algorithm is almost unchanged,but the decoding performance improves significantly.

关 键 词：不规则重复累积码 置信传播译码算法 最小和译码算法 最小均方误差准则 

分 类 号：TN911[电子电信—通信与信息系统]