| 低重量种子序列对Turbo码低码重分布的影响 |
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| 引用本文： | 张卫党,阎新芳,邵霞.低重量种子序列对Turbo码低码重分布的影响[J].郑州大学学报(工学版),2006,27(2):88-90. |
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| 作者姓名： | 张卫党 阎新芳 邵霞 |
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| 作者单位： | 1. 郑州大学信息工程学院,河南,郑州,450052
2. 中国网通有限公司郑州分公司,河南,郑州,450052 |
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| 摘 要： | 用概率的方法,分析了不同重量的种子序列经过交织后仍为种子序列的概率,讨论了低重量的种子自结尾输入序列对Turbo码的低码重分布的影响.通过分析讨论指出,如果Turbo码生成多项式中的反馈多项式的周期较长,重2输入序列产生的码字重量就会较大,而其他重量的种子输入序列,尤其是重量为3,4的种子输入序列,产生的码字重量就很有可能低于重2输入序列产生的码字重量.交织器的长度越短,出现这种情况的概率就越大.
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| 关 键 词： | Turbo码 码重分布 交织器 |
| 文章编号： | 1671-6833(2006)02-0088-03 |
| 修稿时间： | 2006年1月6日 |
Influence of Low-weight Seed Sequences on Low- Weight Distributions of Turbo Codes |
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| ZHANG Wei-dang,YAN Xin-fang,SHAO Xia.Influence of Low-weight Seed Sequences on Low- Weight Distributions of Turbo Codes[J].Journal of Zhengzhou University: Eng Sci,2006,27(2):88-90. |
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| Authors: | ZHANG Wei-dang YAN Xin-fang SHAO Xia |
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| Abstract: | Using the probability method,the probabilities of a seed sequence is still a seed sequence after inter-leaving are calculated.The influence of the low-weight seed sequences on the low weight distributions of Turbo codes is discussed.The results show that the longer the period of the feedback polynomial of the generating matrix is,the heavier the weight of the codewords caused by the weight-2 input sequences is,and therefore the weights of the codewords caused by other kinds of input sequences,such as weight-3 or weight-4 seed sequences,maybe exceed that by the weight-2 input sequences.The shorter the period, the more probably this case happens. |
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| Keywords: | Turbo codes weight distributions of Turbo codes interleaver |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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