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Hi PrzeM,

Yes, it is very possible to calculate the window-modified spectrum,
which is a convolution of the data spectrum and the window spectrum.
However, the temporal windows were invented to save efforts, instead
of performing convolution in the freq domain perform multiplication
in the time domain.

Regards,

Andrew

> 2. Hann windowed FFT from 'rectangular' one ?
>    Posted by: "p...@wp.pl" p...@wp.pl maziewski_p
>    Date: Sat Aug 19, 2006 5:12 am (PDT)
>
> Hello,
>
> This is my first post in this group so let me say hi to everybody :)
>
> ... and of course I have a question, probably simple but ...
>
> (how) can I get hann-windowed complex  FFT values from the plain 
> (unwindowed) complex FFT ?
>
> In other words, having complex spectra X = fft(x, N), can I get 
> hann-windowed complex spectra Xh from X ?
>
> Thanks in advance,
>
> Best regards,
> PrzeM

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