基于滑窗结构的软输出维特比算法的实现  

Implementation of Window-based Soft-Output-Viterbi Algorithm

作　　者：彭丹丹[1] 周振东[1] 王匡[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《电路与系统学报》2004年第3期141-144,共4页Journal of Circuits and Systems

摘　　要：文章在对软输出维特比算法(SOVA)进行推导的基础上,分析了软信息的提取过程。同时从硬件实现的角度考虑,提出了一种基于滑动窗口结构的SOVA算法实现方案,该算法大大降低了算法实现复杂度和译码延迟,同时通过调整滑窗参数,可以取得与非滑窗SOVA算法几乎相同的性能。The paper presented an analysis of the mechanism of soft-output-Viterbi-algorithm and the extraction of soft-information. For practical implementation, a more general scheme of slide-window soft-output-Viterbi-algorithm is proposed. By adjusting its slide-window parameters, it can reduce the complexity of the algorithm as much as possible meanwhile the performance nearly remains the same as the decoding scheme based on the non-slide-window SOVA.

关 键 词：软输出维特比算法 卷积码 译码 软信息 

分 类 号：TN911.22[电子电信—通信与信息系统]