| 一种改进的多元LDPC译码算法 |
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| 引用本文： | 孙琢,洪海丽.一种改进的多元LDPC译码算法[J].装备指挥技术学院学报,2011(5):89-92. |
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| 作者姓名： | 孙琢 洪海丽 |
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| 作者单位： | 装备指挥技术学院研究生管理大队;装备指挥技术学院光电装备系; |
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| 摘 要： | 为解决多进制LDPC码基于FFT-BP译码算法不利于硬件实现的问题,提出了一种改进算法:利用对数运算,将乘法运算变换成对数域上的加法运算,从而降低复杂度,便于硬件实现。对该算法在高斯白噪声信道,基于GF(4)有限域、码率0.5的规则LDPC码(486,972)进行了仿真分析。结果显示:改进的FFT-BP译码算法相对传统的FFT-BP译码算法,在误码性能上损失极小(当误码率10-4时,信噪比损失大约0.07dB)情况下,能够使译码算法硬件复杂度得到较大的改善。
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| 关 键 词： | 多元LDPC码 FFT-BP译码算法 误码率 |
An Updating Decoding Algorithm of Non Binary LDPC Code |
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| SUN Zhuo,HONG Haili.An Updating Decoding Algorithm of Non Binary LDPC Code[J].Journal of the Academy of Equipment Command & Technology,2011(5):89-92. |
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| Authors: | SUN Zhuo HONG Haili |
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| Affiliation: | SUN Zhuo1,HONG Haili2 (1.Company of Postgraduate Management,the Academy of Equipment Command & Technology,Beijing 101416,China,2.Department of Optical and Electrical Equipment,China) |
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| Abstract: | An improved decoding algorithm is presented in order to solve the problem of inconvenient for hardware implementation in decoding algorithm for non-binary LDPC codes based on the FFT-BP algorithm.The innovation of the new algorithm is the importing of the logarithmic operations,which will transform multiplication operations to addition operations in the logarithmic domains.Thus the presented algorithm has the advantages of the reduced complexity and the more convenient hardware implementation.A simulation i... |
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| Keywords: | non binary LDPC decoder FFT-BP decoding algorithm bit error rate(BER) |
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