非对称Turbo码的设计  

Design for the asymmetric Turbo codes

作　　者：汪汉新[1] 朱翠涛[1] 

机构地区：[1]中南民族大学电子信息工程学院,武汉430074

出　　处：《计算机工程与应用》2010年第22期65-67,共3页Computer Engineering and Applications

基　　金：国家民委自然科学基金No.07ZN02~~

摘　　要：采用具有不同约束长度和不同类型生成多项式的递归系统卷积码作为Turbo码的两个分量码,设计了两类非对称Turbo码,可以有效地解决标准对称Turbo码在整个信噪比范围不能同时具有较好的误比特率性能和较低的错误平层的问题。计算机仿真结果表明采用非对称Turbo码,可以降低Turbo码的译码复杂性,实现Turbo码在低信噪比的性能和高信噪比的错误平层的良好折中,有效地改善Turbo码的整体误比特率性能。Two types of asymmetric turbo codes are proposed,which are consisted of the parallel concatenated turbo codes that use the different types of the component codes with different not only the constraint length but also the generator polynomial,the proposed scheme can improve the BER performance in the region of the lower SNR and reduce the error floor in the region of the higher SNR.The simulation results show the asymmetric turbo codes can perform better than the typical symmetric system at both low and high SNR with reduced decoding complexity.

关 键 词：非对称Turbo码 误比特率 错误平层 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]