
From:  omar mettouchi 
Subject:  [Tftbhelp] need for a clarification 
Date:  Sun, 13 Aug 2006 13:42:05 +0000 
Hi,
I know that it is note the time for, but if someone can help me, I have some questions about the time frequency representations :
 in the tfrwv, I dont understand how the analytic form of the analytic signal ( without using the Hilbert transform) is introduced ??
 in the tfrspwv, I don t understand why in the line 80 we compute the average of the frequency smoothing window g : Lg=(grow1)/2; g=g/sum(g);and in the 85, the normalization of the time smoothing window h : Lh=(hrow1)/2; h=h/h(Lh+1);
I suppose that the analytic form of the signal is introduced with the same way.
Either why the choose of: hlength=floor(N/4)and glength=floor(N/10)???
 in the tfrsp why the normalization of the window for the computation of the tfr in the line 87: tfr(indices,icol)=x(ti+tau).*conj(h(Lh+1+tau))/norm(h(Lh+1+tau));
Thanks for all
O.METTOUCHI
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