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一种改进的多元LDPC码译码算法 被引量:3

Modified FFT-BP Decoding Algorithm of Non-binary LDPC Codes
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摘要 在多元LDPC码的软判决译码算法中,迭代过程中没有使用判决结果和校验和中隐藏的一些信息,在判决结果中隐藏着稳定性信息,校验和中隐藏着变量节点的可靠度信息。从混合译码算法思路出发,借鉴硬判决译码算法中统计校验和的做法和联合迭代检测译码算法中的反馈调整思想,对FFT-BP译码算法进行了改进。改进算法利用迭代过程中的可靠性和稳定度信息,对由变量节点向校验节点传递的消息向量进行调整以使其提供更多正确信息。仿真结果表明,改进的译码算法在没有增加复杂度的前提下,提升了FFT-BP译码算法的性能,在不同参数设置下,性能改进在0.2 d B左右。 Some information hidden in the decision results and sum of check equations is not used in soft-decision decoder for non-binary LDPC codes.However,stability and reliability information lies in the iteration results.In this paper,following the clue of hybrid decoding,the ideas in hard-decision decoding algorithm are used to modify the FFT-BP algorithm.In the new decoding algorithm, the stability and reliability information is used,and small adjustments are applied to the iteration results.Simulation results show that the modified FFT-BP algorithm can realize a performance improvement of about 0.2 dB.
作者 张福星 许生旺 ZHANG Fu-xing XU Sheng-wang(Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China)
出处 《无线电通信技术》 2016年第6期56-58,69,共4页 Radio Communications Technology
关键词 多元LDPC码 FFT-BP译码算法 算法改进 non-binary LDPC code FFT-BP decoding algorithm modified algorithm
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参考文献13

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