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   -> Volume 5, Issue 6

Answer: Noise reduction for poor SNR (WD 5.5 #18)
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PostPosted: Wed Jul 17, 1996 2:07 pm    
Subject: Answer: Noise reduction for poor SNR (WD 5.5 #18)
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Answer: Noise reduction for poor SNR (WD 5.5 #18)

> I have a one-dimensional string of data which has very poor SNR. I
> want to know what wavelet techniques are available to separate the
> signal ( which is amplitude modulated sinusoid in my case ) from the
> noise ( which I assume to be white mostly ). Can an expert on this
> aspect of the wavelets help me with this ?

Answer 1:

You may want to try the famous wavelet shinkage denoising method proposed
by Donoho et al. The algorithms are available as a matlab toolbox called
WaveLab which you can get from

Good luck,

Yan Hui

Answer 2:

In response to your question in the wavelet digest

I studied this subject recently with Carmona and Hwang, and we have a
couple of papers, to appear at IEEE Trans. Sig. Proc., available at and
These papers might contain answers interesting to you.

Sincerely yours

Bruno Torresani <>
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