中原大學電機工程學系
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102學年度
以小波多層解析進行電力線通訊之自適應雜訊濾除
指導老師:洪穎怡   組長:於迪萱   組員:於迪萱
本文將透過模擬通道內之電力線雜訊,並經由小波理論的多重解析分析來濾除雜訊。本文以X10調變技術為例,先透過對電力系統60 Hz電壓瞬間波形多重解析之分解與重建結果,經比對查表來推論通道之訊雜比,藉此自適應調整在電壓零交越點處上120kHz的方波所需用多重解析之最適重建階數,以達到自動濾除雜訊的功能。本文也證實小波理論的多重解析分析來濾除雜訊具有強健性,即所建立的訊雜比對誤差查表不受60 Hz電壓振幅變化影響。
This paper presents a novel adaptive de-noising technique based on the multi-resolution analysis (MRA) of wavelet transform for X10, which is a communication protocol designed for sending signals over low-voltage AC wiring. The proposed method establishes a look-up table to detect the noise level of 60-Hz signals. The proposed method is robust irrespective of variations of amplitude of a 60-Hz signal. According to the above identified noise level, the noise imposed upon 120-kHz bursts in X10 can be mitigated via proper decomposition and reconstruction scales of MRA.
我們決定將壓電陶瓷晶片和鞋子做結合。
   
 
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