| 一种改进的LDPC码多比特翻转译码算法 |
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| 引用本文： | 谢东觉,张兴敢,唐岚.一种改进的LDPC码多比特翻转译码算法[J].现代电子技术,2011,34(3):11-13,16. |
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| 作者姓名： | 谢东觉 张兴敢 唐岚 |
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| 作者单位： | 1. 南京大学,电子科学与工程系,江苏南京,210093
2. 南京大学,电子科学与工程系,江苏南京,210093;毫米波国家重点实验室,江苏,南京,210096 |
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| 基金项目： | 毫米波国家重点实验室资助项目 |
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| 摘 要： | 低密度奇偶校验码（LDPC）的比特翻转译码算法（BF）复杂度低，实用性强。在研究了简单比特翻转法（BF）、加权比特翻转法（WBF）和可靠性比率加权比特翻转法（RRWBF）后，提出一种综合考虑符号绝对值和可靠性比率的BF译码算法。该算法每次可迭代翻转多个比特，仿真结果表明，与RRWBF算法相比，改进算法在信噪比为5dB时，误码率由10^-3数量级提高到10^-4。
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| 关 键 词： | LDPC 符号绝对值 可靠性比率 多比特翻转 迭代译码 |
An Improved Multi-bit Flipping Algorithm for LDPC Decoding |
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| XIE Dong-jue,ZHANG Xing-gan,TANG Lan.An Improved Multi-bit Flipping Algorithm for LDPC Decoding[J].Modern Electronic Technique,2011,34(3):11-13,16. |
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| Authors: | XIE Dong-jue ZHANG Xing-gan TANG Lan |
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| Affiliation: | XIE Dong-jue1,ZHANG Xing-gan1,2,TANG Lan1,2(1.Department of Electronic Science and Engineering,Nanjing University,Nanjing 210093,China,2.State Key Laboratory of Millimeter Waves,Nanjing 210096,China) |
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| Abstract: | The bit-flipping(BF) algorithm of low density parity check(LDPC) code has low computation complexity and great practicability.On the basis of studying simple BF,WBF and RRWBF,an improved BF algorithm is proposed on considering the reliability ratio and absolute value of symbol.The proposed algorithm flips more than one bit in each iteration.Simulation results indicate that compared with RRWBF,the error rate of the proposed algorithm with 5 dB is improved from 10-3 to 10-4. |
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| Keywords: | LDPC |
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