中国科学院大学学报2017，Vol.34Issue(4)：413-421,9.DOI:10.7523/j.issn.2095-6134.2017.04.002
基于空间策略网格的符号级联合信源信道编译码快速算法
Joint source channel symbol-level en/decoding fast algorithm based on space policy trellis
摘要
Abstract
Joint source channel symbol-level en/decoding fast algorithm based on space policy trellis is presented in this paper.Constructing a joint decoding plane trellis achieves better decoding performance than the bit-level decoding method.However,the complicated construction of plane trellis causes a high degree of complexity of the joint source channel symbol-level decoding.In this work,we construct a new efficient space policy trellis,optimize design of weight value of variablelength symbols by meeting the constraint condition system of equation,and then form an integrated fast algorithms with VLS-APP decoding.The results of two kinds of simulations indicate that our fast algorithm leads to near 50％ reduction of the decoding complexity and lowers bit error rate in the same SNR of channels,compared to the decoding method based on plane trellis.So this method provides reliable error-protection mechanism for variable-length encoded information data,and it can be applied in joint source channel symbol-level en/decoding under resource-constrained situation like the space communication.关键词
联合编译码/可变长编码/空间策略网格/权重值优化Key words
joint en/decoding/variable-length coding/space policy trellis/optimization design of weight value分类
信息技术与安全科学引用本文复制引用
王强,张灿,高绍帅,凃国防..基于空间策略网格的符号级联合信源信道编译码快速算法[J].中国科学院大学学报,2017,34(4):413-421,9.基金项目
Supported by National Natural Science Foundation of China (61571416,61271282) （61571416,61271282）
