| LDPC迭代译码联合噪声方差估计 |
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| 引用本文： | 潘小飞,刘爱军,张邦宁,王杭先.LDPC迭代译码联合噪声方差估计[J].应用科学学报,2007,25(6):598-602. |
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| 作者姓名： | 潘小飞 刘爱军 张邦宁 王杭先 |
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| 作者单位： | 解放军理工大学,通信工程学院,江苏,南京,210007 |
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| 基金项目： | 国家自然科学基金;国防科技预研项目 |
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| 摘 要： | 基于EM算法推导了噪声方差的最大似然估计算法,并利用推导结果来修正LDPC的LOG域的置信传播译码算法,进行迭代译码联合噪声方差的估计.仿真结果表明,该文提出的噪声方差估计方法,较好地完成了噪声方差未知时LDPC迭代译码的辅助工作,使噪声方差未知时的系统误比特率性能恶化小于0.1 dB.
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| 关 键 词： | 低密度校验码 EM算法 噪声方差估计 |
| 文章编号： | 0255-8297（2007）06-0598-05 |
| 修稿时间： | 2007-01-08 |
Joint Iterative Decoding and Noise Variance Estimation Based on Expectation-Maximization |
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| PAN Xiao-fei,LIU Ai-jun,ZHANG Bang-ning,WANG Hang-xian.Joint Iterative Decoding and Noise Variance Estimation Based on Expectation-Maximization[J].Journal of Applied Sciences,2007,25(6):598-602. |
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| Authors: | PAN Xiao-fei LIU Ai-jun ZHANG Bang-ning WANG Hang-xian |
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| Institution: | Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China |
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| Abstract: | Effects of noise variance estimation on the LDPC decoding performance are investigated.Based on the algorithm of expectation-maximization(EM),a noise variance estimation method is obtained.The method is applied to the BP decoding algorithm.Simulations show that,with the proposed method,the observed performance degradation is less than 0.1 dB when the noise variance is unknown. |
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| Keywords: | LDPC expectation-maximization algorithm noise variance estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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