| 最佳1/2卷积码VITERBI译码算法的简化 |
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| 引用本文： | 钟福元.最佳1/2卷积码VITERBI译码算法的简化[J].电子科技大学学报(社会科学版),1989(3). |
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| 作者姓名： | 钟福元 |
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| 作者单位： | 电子科技大学图书馆 |
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| 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。
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| 关 键 词： | 卷积码 译码 硬判决 软判决 译码算法 译码性能 |
SIMPLIFYING OF THE VITERBI ALGORITHM FOR RATE 1/2 CONVOLUTIONAL CODES WITH MAXIMUM FREE DISTANCE |
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| Zhong Fuyuan.SIMPLIFYING OF THE VITERBI ALGORITHM FOR RATE 1/2 CONVOLUTIONAL CODES WITH MAXIMUM FREE DISTANCE[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),1989(3). |
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| Authors: | Zhong Fuyuan |
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| Abstract: | 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 the decoding performance. |
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| Keywords: | convolutional codes decoding hard-decision decoding soft-decision decoding trellis decoding algorithm decoding performance |
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