| 一种改进的LDPC码与卷积码级联方案 |
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| 引用本文： | 李亚汉,郭旭东,王新梅.一种改进的LDPC码与卷积码级联方案[J].北京电子科技学院学报,2004,12(4):39-42. |
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| 作者姓名： | 李亚汉 郭旭东 王新梅 |
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| 作者单位： | 西安电子科技大学,综合业务网国家重点实验室,西安,710071;西安电子科技大学,综合业务网国家重点实验室,西安,710071;西安电子科技大学,综合业务网国家重点实验室,西安,710071 |
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| 摘 要： | 给出一种改进的LDPC码与卷积码级联方案.LDPC码编码利用消除四环的下三角校验矩阵进行线性编码,在实现快速编码的同时保证较好的性能.在级联系统中,LDPC码采用由短码交织而成的长码,可实现并行译码,获得接近长码的性能.整个方案实现起来复杂度较低、时延小.仿真结果表明在小信噪比状态下,其性能明显优于RS码和卷积码的级联系统.
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| 关 键 词： | LDPC码 卷积码 级联 RS码 比特翻转算法 交织 |
| 文章编号： | 1672-464X(2004)04-0039-04 |
| 修稿时间： | 2004年9月7日 |
An Improved Concatenation Scheme for LDPC and Convolutional Codes |
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| Li Yahan,Guo Xudong,Wang Xinmei.An Improved Concatenation Scheme for LDPC and Convolutional Codes[J].Journal of Beijing Electronic Science & Technology Institute,2004,12(4):39-42. |
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| Authors: | Li Yahan Guo Xudong Wang Xinmei |
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| Abstract: | In this paper, an improved concatenation scheme for LDPC and convolutional codes is proposed. The process of LDPC coding is linear and fast by using of a lower triangular check-matrix whose four cycles were eliminated. In the concatenated system, the LDPC code is a sort of long code consisting of interlaced short codes, which can be parallelly decoded so as to reach the performance of long code. This scheme has the advantages of low complexity and short delay. The results of analyses and simulations show that in the condition of low signal-to-noise ratios the performance of concatenated LDPC and convolutional codes is obviously better than that of concatenated RS code and convolutional codes . |
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| Keywords: | LDPC code convolutional code Concatenation RS code bit flipping algorithm interlaced code |
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