3G系统中Turbo译码改进及DSP实现  

DSP Implementation of Turbo Decoder for 3G System

作　　者：朱磊[1] 陈红[1] 

机构地区：[1]西南交通大学信息编码与传输省重点实验室,四川成都610031

出　　处：《现代电子技术》2008年第5期54-56,60,共4页Modern Electronics Technique

摘　　要：由于Turbo码优异的纠错性能,使其在第三代移动通信系统中倍受重视。为了解决Turbo码存在的译码复杂度大、译码延时长的缺点,在分析已有的Max-Log-Map码译码算法基础上,针对DSP的特点进行改进,提出加入滑动窗和改进的归一化度量算法,在保证译码性能的前提下,大大降低其运算复杂度,并将滑动窗的方法用于译码模块,极大的减少了存储空间。More and more attention is paid to Turbo codes in 3G system because of its good performance. To solve high complexity of algorithm,long time delay and large store space about the application of Turbo. Based on the conventional Log- MAP decoding algorithm of Turbo code,an improved SW- Log- MAP algorithm is proposed by using sliding- window algorithm,greatly reduces the computational complexity and memory space without performance degradation.

关 键 词：TURBO码 滑动窗 MAX-LOG-MAP算法 DSP 

分 类 号：TN929.5[电子电信—通信与信息系统]