卷积码编码及其Viterbi译码的实现  

The Implementation of Convolutional Encoding and Viterbi Decoding

作　　者：张传达[1] 李小文[1] 

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《无线电工程》2006年第7期45-48,共4页Radio Engineering

基　　金：国家"863"基金资助项目(2004AA123150)。

摘　　要：对3G系统中定义的卷积码编码进行了分析,并以1/2卷积码为例重点讨论了编码和Viterbi译码算法的实现方案。为求系统在保持同等性能条件下可以高效率实现,对Viterbi译码实现中的留存路径更新、数据溢出处理和输出判决部分进行了优化,优化的结果使得系统的性能和效率都有提高。根据仿真结果对系统的性能进行了分析,其结果对系统的工程实现有着重要的参考价值。The coding of convolution code adopted in 3G system and Viterbi decoding of 1/2 rate convolutional code are discussed in this paper. For the sake of realizing the system in higher efficiency with the same system＇ s performance, survivor path, data overflowing and decision parts are optimized in the system implementation. The results of optimization show that both the system performance and efficiency are improved. It also discusses the simulation＇s results, which may provide significant reference in system implementation.

关 键 词：卷积码 VITERBI译码 3GPP 软判决 MATLAB 

分 类 号：TN911.22[电子电信—通信与信息系统]