摘要
本文给出了1/2卷积码篱笆图蝶形结构各支路间关系的三个定理,及最佳1/2卷积码的特征。根据这些特征并利用译码过程中共有的中间变量,使译码运算次数减少为原来的5/6,简化不影响译码性能,并适用于硬判决和软判决译码方式。
This paper gives three theorms about the relation between transition branches in trellis of rate 1/2 convolutional codes and some characteristics of the ptivnum 1/2 convolutional codes. According to these characteristics and using the common middle variables in decoding operation, a new method to simplify the VITERBI decoding algorithm is obtained. The method reduces the decoding operation number to 5/6 of normal algorithm, and can be applied to hard-decision or soft-decision decoding, and doesn't degrade t...
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1989年第3期243-248,共6页
Journal of University of Electronic Science and Technology of China
关键词
卷积码
译码
硬判决
软判决
译码算法
译码性能
convolutional codes
decoding
hard-decision decoding
soft-decision decoding
trellis
decoding algorithm
decoding performance
