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wavelet analysis using matlab wavemenu GUI

Started by shivraman giri July 3, 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



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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