摘要
Viterbi译码算法是最大似然译码。论文所研究的改进Viterbi算法,不但保持了原有Viterbi算法的特性,而且在减少译码路径的情况下,能较好地解决突发错误信道中,原Viterbi译码算法则性能急剧下降的问题。通过在编码信道模型上的仿真表明,已知正确的约束位越多,分布的越密,则提高的性能越明显。
Viterbi algorithm decoding is a kind of maximum likelihood decoding. In this paper,the improvement of Viterbi algorithm is produced,experiment results show that it can overcome the drawback of the decoding performance greatly degraded, when burst errors occur, and reduce the decoding complexity while keeping the good characteristic of conventional Viterbi algorithm. Simulations over coding channel show that the more correct bits we know the better the performance is.
出处
《电脑编程技巧与维护》
2008年第17期2-3,共2页
Computer Programming Skills & Maintenance
关键词
信道编码
维特比译码
通信
channel coding
Viterbi algorithm
communication
