CAJ | 학술논문

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-fractal detrended fluctuation analysis，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。
위료경호지료해전력선통신신호특성，극복전통선성모형화통계학삼수불능흔호묘술전력선통신신호적비평은、비선성특성적결점，인입다중분형소제추세파동분석법(multi-fractal detrended fluctuation analysis，MFDFA)대BB-PLC신호진행다중분형특성검험，병침대전통MF-DFA법적불족，결합소파이론，제출일충개진적산법대BB-PLC다중분형특성진행판정，재험증기구유명현다중분형특성적기출상，대기진행다중분형보분석화상관함수검험。실험결과표명，전력선통신신호구유명현분형특정。소득결과가위관대전력선신도건모등기술제공삼고。
ABSTRACT:To better understand the power line communication signal characteristics and overcome the shortcomings of traditional linear models and statistical parameters which can not well describe non-stationary and nonlinear characteristics of power line communications signals, this paper tested the multi-fractal of thebroad band power line communication (BB-PLC) signal by the method of multi-fractal detrended fluctuation analysis (MFDFA). And because of the shortcoming of the traditional MFDFA, an improved algorithm combing with wavelet theory was proposed. After verifying the obvious multi-fractal characteristics, multi-fractal spectrum analysis and correlation test were made. Experimental results show that the power line communication signal has obvious fractal characteristics. All these results can provide reference for broadband power line channel modeling technology.