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.
出处
《电路与系统学报》
CSCD
2004年第3期141-144,共4页
Journal of Circuits and Systems
关键词
软输出维特比算法
卷积码
译码
软信息
soft-output Viterbi algorithm (SOVA)
convolution code
decode
soft information
