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Discussion Groups | Matlab DSP | wavelet analysis using matlab wavemenu GUI

Technical discussion about Matlab and issues related to Digital Signal Processing.

  

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wavelet analysis using matlab wavemenu GUI - shivraman giri - Jul 3 7:37:00 2003



hi,
does anyone know how to find out the sinusoidal components in a nonstationary
signal at a given instant using wavelet.
i can plot the scalogram using the matlab wavemenu GUI , but beyond this , i
cant analyze the signal.
also i have thought of a scheme which entails plotting fourier transform of a
wavelet, which is scaled to a particular value . but then i cant find a way to
compute the fourier transform of mother wavelets.
any help would be greatly appreciated

regards
shivraman




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RE: wavelet analysis using matlab wavemenu GUI - Marco Risco M. - Jul 3 16:59:00 2003

Hi,

Maybe you need to use Matching Pursuit, which is based in gabor function for
the decomposition of a signal, at http://brain.fuw.edu.pl/mp/ you can find a
interactive display of its use, matlab functions, even source code in c and
java.
With respect to scalogram you must think in scales instead of frequencies,
anyway you can link both through the functions scal2frq and centfrq, you
should also review
http://www.engmath.dal.ca/courses/engm6610/notes/node3.html

Regards,
Marco

-----Mensaje original-----
De: shivraman giri [mailto:]
Enviado el: jueves 3 de julio de 2003 02:38
Para: ; ds c data;
; ;
; ;

Asunto: [matlab] wavelet analysis using matlab wavemenu GUI

hi,
does anyone know how to find out the sinusoidal components in a
nonstationary signal at a given instant using wavelet.
i can plot the scalogram using the matlab wavemenu GUI , but beyond this
, i cant analyze the signal.
also i have thought of a scheme which entails plotting fourier transform
of a wavelet, which is scaled to a particular value . but then i cant find
a way to compute the fourier transform of mother wavelets.
any help would be greatly appreciated

regards
shivraman
_____________________________________
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