| 基于EXIT Chart的码率兼容LDPC码的构造 |
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| 引用本文： | 沈进旗,俞晖,徐友云. 基于EXIT Chart的码率兼容LDPC码的构造[J]. 信息技术, 2008, 32(7) |
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| 作者姓名： | 沈进旗 俞晖 徐友云 |
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| 作者单位： | 上海交通大学电子工程系,上海,200240 |
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| 摘 要： | 提出了一种码率兼容LDPC(Rate-Compatible LDPC,以下简称RC-LDPC)码的构造方法.通过该方法构造所得到的一个高码率LDPC码的校验矩阵(H矩阵)中所包含的其它低码率LDPC码的度分布对都是通过码率兼容约束EXIT Chart优化得到.仿真结果表明这样优化得到的各个码率的LDPC码性能与采用普通的最优约束EXIT Chart优化所得到的LDPC码的性能接近.
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| 关 键 词： | 低密度校验码 外信息转移图 码率兼容 打孔 边增长 |
Construction of rate-compatible LDPC codes based on EXIT Chart |
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| SHEN Jin-qi,YU Hui,XU You-yun. Construction of rate-compatible LDPC codes based on EXIT Chart[J]. Information Technology, 2008, 32(7) |
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| Authors: | SHEN Jin-qi YU Hui XU You-yun |
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| Affiliation: | SHEN Jin-qi,YU Hui,XU You-yun (Department of Electronic Engineering,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | A novel method is proposed to construct rate-compatible LDPC(RC-LDPC) codes.One check matrix constructed by the proposed method contains several sub check matrices with different code rates.The degree distribution of each sub code is optimized by EXIT Chart with rate-compatible constraint.It is found that the performance of each sub code is as the same as the code optimized by optimal EXIT Chart and construct independently. |
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| Keywords: | LDPC codes EXIT Chart rate-compatible puncture progressive edge growth |
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