從噪聲中恢復(fù)瞬態(tài)信號的Gabor級數(shù)法
RECOVERY OF TRANSIENT SIGNAL EMBEDDED IN NOISE USING GABOR SERIES
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摘要: 該文研究了從噪聲中恢復(fù)原瞬態(tài)信號問題。根據(jù)瞬態(tài)信號和噪聲的Gabor系數(shù)在時-頻平面上分布不同的特點,借用假設(shè)檢驗理論,提出了一種恢復(fù)被噪聲污染的原瞬態(tài)信號的Gabor級數(shù)方法,進(jìn)行了計算機仿真和對實際信號的處理。
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關(guān)鍵詞:
- 時-頻分布; Gabor級數(shù); 信號復(fù)原; 噪聲抑制
Abstract: In this paper, the recovery of transient signals embedded in noise is studied. It is noticed that there is different feature between the transient signal s Gabor coefficients and the noise s Gabor coefficients distributed in time-frequency plane, the Gabor series method is presented for recovering transient signals embedded in noise in terms of hypothesis test theory. The computer simulation is implemented for exponential transient signal. This method is also used to process real-life signals. -
B.Friedlarder,Detection of transient signals by the Gabor representation,IEEE Trans on ASSP,1989:ASSP-37(2),169-180.[2]A.J.E.M.Janssen.The Zak transform:A signal transform for sampled time-continuous signals,Philips Journal of Research,1998,43(1),23-69.[3]R.S.Orr,Computational assessment of Gabor representations,Int .Conf.Acoust.Speech.Sig.Proc.Toronto,Canada,1991,2217-2210.[4]Mei Wenbo,Shark Lik-Kwan,Recovery of transient signals in noise by optimal thresholding in wavelet domain,Journal of Beijing Institute of Technology,1997,6(3):274-279. -
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