| 适用LDPC码的基于最小均方误差准则的改进译码算法 |
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| 引用本文： | 刘 翔,温 娜,徐永太,刘宝玲
.适用LDPC码的基于最小均方误差准则的改进译码算法[J].北京邮电大学学报,2007,30(5):51-54. |
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| 作者姓名： | 刘 翔 温 娜 徐永太 刘宝玲
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| 作者单位： | 北京邮电大学泛网无线通信教育部重点实验室,北京100876 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，三星电子中国通信研究院项目，高等学校学科创新引智计划项目 |
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| 摘 要： | 提出了一种适用于LDPC码的基于最小均方误差准则的UMP BP-based改进译码算法。该算法结合了两种UMP BP-based改进译码算法(normalized UMP BP-based译码算法和offset UMP BP-based译码算法)的处理方法，并基于最小均方误差准则得到相应的归一化因子和偏移量因子。仿真结果表明，当使用码长为1008，码率为1/2的(3,6)规则LDPC码时，所提算法和上述两种算法相比，在BER=10-6时，可以节省0.03dB。
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| 关 键 词： | 低密度校验码 最小均方误差 译码算法 |
| 文章编号： | 1007-5321(2007)05-0051-04 |
| 收稿时间： | 2006-11-13 |
| 修稿时间： | 2006骞?1鏈?3 |
An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes |
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| LIU Xiang,LI Li-hua,LIU Bao-ling,WEN Na,XU Yong-tai.An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes[J].Journal of Beijing University of Posts and Telecommunications,2007,30(5):51-54. |
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| Authors: | LIU Xiang LI Li-hua LIU Bao-ling WEN Na XU Yong-tai |
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| Affiliation: | Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | An improved decoding algorithm based on minimum mean square error(MMSE) for LDPC codes is proposed. The new algorithm combines processing methods of two modified UMP BP-based algorithms (normalized UMP BP-based algorithm and offset UMP BP-based algorithm) and attains the corresponding normalization factor and offset factor according to MMSE criterion. Simulation results indicate that compared with the two above-mentioned algorithms a gain of 0.03 dB can be achieved at BER of 10-6 with the proposed algorithm when a (3,6) regular LDPC code of code length 1008 and code rate 1/2 is used. |
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| Keywords: | low-density parity-check codes minimum mean square error decoding algorithm |
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