| 应用循环移位矩阵设计LDPC码译码器 |
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| 引用本文： | 管武,董明科,项海格.应用循环移位矩阵设计LDPC码译码器[J].应用科学学报,2009,27(2):117-123. |
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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： | 通过对DVB-S2和WiMAX等标准中的实用LDPC码的分析，导出了其共同的基于循环移位矩阵的校验阵结构；设计了一种基于循环移位矩阵的LDPC码译码器，该译码器拥有每行块(列块)逐块、逐行块(列块)的半并行译码机制、通用的外信息存储单元和串行运算单元，可以用相同的结构实现不同码率的各种LDPC码. 采用该结构在Altera EP2S60芯片上实现了码长为8 064、比特码率为7/8, 6/8, 5/8, 4/8, 3/8 这5 个码率的多码率LDPC码译码器. 测试结果表明，译码器的有效符号速率达到80 Mbit/s.
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| 关 键 词： | 低密度奇偶校验码（LDPC码） 译码器 循环移位矩阵 |
| 收稿时间： | 2008-03-12 |
| 修稿时间： | 2008-12-19 |
Design of LDPC Coder-Decoder Based on Cyclic Shift Matrices |
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| GUAN Wu,DONG Ming-ke,XIANG Hai-ge.Design of LDPC Coder-Decoder Based on Cyclic Shift Matrices[J].Journal of Applied Sciences,2009,27(2):117-123. |
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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: | In this paper, the LDPC codes used in DVB-S2 and WiMAX are analyzed. A universal structure based on cyclic shift matrices is presented for these codes. A partially parallel decoder is designed with a universal storage
resource reusing architecture and serial operation processors. This decoder has been implemented on an Altera EP2S60 platform, and can work for 8 064 bit code length at rates 7/8, 6/8, 5/8, 4/8 and 3/8. Test results show that its code throughput can approach 80 Mbit/s. |
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| Keywords: | low density parity check (LDPC) codes decoder cyclic shift matrices |
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