基於S轉換之雜訊去除系統及方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

097133429

專利證號

I 369072

專利獲證名稱

基於S轉換之雜訊去除系統及方法

專利所屬機關 (申請機關)

國立成功大學

獲證日期

2012/07/21

技術說明

多種應用於去除生物訊號中電源雜訊干擾的技術已經被開發出來，但是這些技術往往在移除電源雜訊的同時，會造成原始訊號的失真與過度衰減。我們應用S轉換可正確解析特定頻率成份相位大小的特性，把記錄到的訊號在電源頻率處，分解成振幅與相位兩個部份，依據我們提出的演算法去估計其中電源雜訊成份的所佔的能量百分比，合成一個電源雜訊成份，然後與受到電源雜訊污染的訊號相減以去除之，還原出未受雜訊干擾的原始訊號。實驗證實可以成功保留原始訊號並去除電源干擾。 Various methods have been applied for the elimination of powerline interference from bio-signals. However, most methods reduce both signals and interference. A novel powerline interference subtraction method based on the S-transform decomposition is proposed. Advantage of the S-transform is a multi-resolution analysis that preserves absolute phase of each frequency component. The real power contributed by powerline interference can be accurately estimated using the S-transform. Signal is first decomposed by S-transform into amplitude and phase array separately. Then, different methods applied for estimating amplitude and phase of the noise are compared. Powerline interference is effectively removed. The spectrum is preserved based on simulated and realistic data. Accordingly, the S-transform is an effective method for powerline interference removal.

備註

本部(收文號1050019163)同意該校105年3月18日成大研總字第1054500179號函申請終止維護專利

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