| LDPC码的改进译码算法 |
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| 引用本文： | 林雪红,吴伟陵.LDPC码的改进译码算法[J].电路与系统学报,2007,12(3):128-130. |
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| 作者姓名： | 林雪红 吴伟陵 |
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| 作者单位： | 北京邮电大学,信息工程学院,北京,100876 |
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| 摘 要： | 由于短帧长LDPC码存在很多环路,其译码性能不具有最优性.本文首先推导了有环路LDPC码的概率译码算法,然后在传统的概率译码算法引入了修正系数,从而减小了环路对译码性能的影响.仿真结果表明,采用改进的译码算法可以提高译码性能.
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| 关 键 词： | LDPC码 概率译码算法 因子图 周长 |
| 文章编号： | 1007-0249（2007）03-0128-03 |
| 修稿时间： | 2004-09-142005-01-18 |
Improved decoding algorithm of Low-Density Parity-Check codes |
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| LIN Xue-hong,WU Wei-ling.Improved decoding algorithm of Low-Density Parity-Check codes[J].Journal of Circuits and Systems,2007,12(3):128-130. |
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| Authors: | LIN Xue-hong WU Wei-ling |
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| Institution: | Department of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | LDPC codes with short blocks deviate from the predicted performance, the most likely reason is that they contain quite a few cycles. This paper deduces the probability decoding algorithm of LDPC codes with cycles, and proposes a new algorithm that introduces a correction coefficient to mitigate the impact of cycles on decoding performance. From the simulation results, the new algorithm can improve the decoding performance. |
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| Keywords: | LDPC code probability decoding algorithm tanner graph girth |
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