| 光纤通信中降低LDPC码译码复杂度的方法 |
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| 引用本文： | 王伟,许渤.光纤通信中降低LDPC码译码复杂度的方法[J].光通信研究,2009,35(1):21-23. |
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| 作者姓名： | 王伟 许渤 |
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| 作者单位： | 电子科技大学,通信与信息工程学院,宽带光纤传输与通信网技术教育部重点实验室,四川,成都,610054 |
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| 摘 要： | 伪循环(QC)低密度奇偶校验(LDPC)码可以给光纤通信系统带来更高的编码增益,但译码过程需要的对数似然比(LLR)的计算很复杂.为了降低LDPC译码器硬件设计的复杂度,文章提出一种光纤信道下简化的LLR的计算方法.仿真结果表明,该计算方法与原计算方法相比仅有0.05 dB的译码性能损失.
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| 关 键 词： | 光纤通信 低密度奇偶校验 迭代译码 译码器 |
| 收稿时间： | 2008/10/7 |
A complexity reduction method for decoding algorithm for LDPC codes in fiber-optic communications |
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| Wang Wei,Xu Bo.A complexity reduction method for decoding algorithm for LDPC codes in fiber-optic communications[J].Study on Optical Communications,2009,35(1):21-23. |
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| Authors: | Wang Wei Xu Bo |
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| Institution: | Key Lab.of Broadband Optical Fiber Transmission and Communication Network Technology;Ministry of Education;School of Communication and Information Engineering;University of Electronic Science and Technology of China;Chengdu 610054;China |
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| Abstract: | Quasi-Cyclic Low-Density Parity-Check(QC-LDPC) code can bring about higher coding gain for fiber-optic communication systems,but the computation of Log-Likelihood Ratio(LLR) in the decoding process is very complicated.To reduce the complexity of the decoder hardware design,this paper introduces a simplified LLR algorithm in fiber channels.The simulation results show that this algorithm is subject to a decoding performance loss of only 0.05 dB compared with the original one. |
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| Keywords: | fiber optic communication LDPC iterative decoding decoder |
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