| 分解法求Turbo码的低码重分布 |
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| 引用本文： | 张卫党,袁聪,王新梅.分解法求Turbo码的低码重分布[J].系统工程与电子技术,2005,27(7):1207-1210. |
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| 作者姓名： | 张卫党 袁聪 王新梅 |
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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. 西安电子科技大学ISN国家重点实验室,陕西,西安,710071 |
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| 基金项目： | 国家自然科学基金资助课题(60272057) |
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| 摘 要： | 基于重2自结尾序列的概念,将输入序列分解,分别求出对应的Turbo码低码重分布的各个分量,并讨论了它们对低码重分布的影响。仿真显示,在有些情况下,不仅重2自结尾序列对低码重分布有重要的影响,重2自结尾序列的组合对低码重分布也有着重要的影响。这种分解算法简单灵活,特别有利于Turbo码的结构性能分析及产生稀疏低码重分布的交织器设计。
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| 关 键 词： | Turbo码 码重分布 交织器 误码率 |
| 文章编号： | 1001-506X(2005)07-1207-04 |
| 修稿时间： | 2004年5月19日 |
Decomposition method to calculate the distribution of low-weight codewords of Turbo codes |
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| ZHANG Wei-dang,YUAN Cong,WANG Xin-mei.Decomposition method to calculate the distribution of low-weight codewords of Turbo codes[J].System Engineering and Electronics,2005,27(7):1207-1210. |
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| Authors: | ZHANG Wei-dang YUAN Cong WANG Xin-mei |
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| Institution: | ZHANG Wei-dang~1,YUAN Cong~2,WANG Xin-mei~2 |
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| Abstract: | Based on the concept of weight 2 self-terminating sequence, a new method, called decomposition method, is presented. It decomposes the self-terminating sequence to several sorts, and for every sort, the according components of the low weight distribution is calculated. It shows that in some circumstances, not only the weight 2 self-terminating sequence, but also the compounds of the weight 2 self-terminating sequence have significant affections on the low weight distribution. This method has comparatively less computing complexity and is flexible to realize. It would be very useful to analyze the constructions of the low weight distributions of Turbo codes and to construct an interleaver that can produce a sparse distribution of low weights of Turbo codes by the method. |
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| Keywords: | Turbo codes distribution of codewords weight interleaver BER |
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