| 一种LDPC编码高阶调制系统的联合解调解码方法 |
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| 引用本文： | 管武,董明科,项海格.一种LDPC编码高阶调制系统的联合解调解码方法[J].电子与信息学报,2010,32(2):340-344. |
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| 作者姓名： | 管武 董明科 项海格 |
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| 作者单位： | 北京大学信息科学技术学院 北京 100871 |
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| 摘 要： | 该文用一种级联码模型描述了LDPC编码高阶调制系统。该级联码模型以LDPC码为外码，二-十进制转换码为内码，再加一个删余模块构成。基于这种级联码模型，该文给出了其联合校验方程和二分图，并提出了级联码置信度传播算法，实现了LDPC编码高阶调制系统的联合解调解码。仿真表明，该文提出的联合解调解码算法有效地改进了LDPC编码高阶调制系统的性能。
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| 关 键 词： | 低密度奇偶校验码 高阶调制 级联码置信度传播 |
| 收稿时间： | 2008-10-10 |
| 修稿时间： | 2009-11-6 |
A Joint Demodulation and Decoding Algorithm for High Order LDPC Coded Modulations |
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| Guan Wu,Dong Ming-ke,Xiang Hai-ge.A Joint Demodulation and Decoding Algorithm for High Order LDPC Coded Modulations[J].Journal of Electronics & Information Technology,2010,32(2):340-344. |
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| Authors: | Guan Wu Dong Ming-ke Xiang Hai-ge |
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| Institution: | School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China |
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| Abstract: | A concatenated code model is proposed for high-order Low-Density Parity-Check (LDPC) coded- modulation scheme. This model is comprised of a serial concatenation of an outer LDPC encoder, an inner Binary-Decimal Conversion (BDC) encoder and a puncture device. A joint parity-check matrix is derived for the concatenated code, and the corresponding joint demodulation and decoding algorithm, named Concatenated-Code Belief Propagation (CCBP), is presented. Simulation results show that this LDPC coded modulation scheme with the CCBP algorithm provides effective improvements relative to the Bit Interleaved Coded Modulation (BICM) scheme for high-order modulations. |
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| Keywords: | Low-Density Parity-Check (LDPC) codes High-order modulations Concatenated-Code Belief Propagation (CCBP) |
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