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宽带电力线通信信号多重分形特性研究

DOI: 10.13334/j.0258-8013.pcsee.2014.25.027, PP. 4430-4436

Keywords: 宽带电力线通信系统,多重分形分析,多重分形消除趋势波动分析法,小波理论

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Abstract:

为了更好地了解电力线通信信号特性,克服传统线性模型和统计学参数不能很好描述电力线通信信号的非平稳、非线性特性的缺点,引入多重分形消除趋势波动分析法(multi-fractaldetrendedfluctuationanalysis,MFDFA)对BB-PLC信号进行多重分形特性检验,并针对传统MF-DFA法的不足,结合小波理论,提出一种改进的算法对BB-PLC多重分形特性进行判定,在验证其具有明显多重分形特性的基础上,对其进行多重分形谱分析和相关函数检验。实验结果表明,电力线通信信号具有明显分形特征。所得结果可为宽带电力线信道建模等技术提供参考。

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