[SciPy-user] Frequency content of a transient signal
Tue Jul 22 02:59:13 CDT 2008
2008/7/22 Nils Wagner <email@example.com>:
> On Tue, 22 Jul 2008 09:15:11 +0200
> "Matthieu Brucher" <firstname.lastname@example.org> wrote:
>> Hi !
>> I think you can use a sliding DFT on your signal. This way, you will
>> get a moving estimation of the spectral information (it's a basic
>> time-frequency transform, before you use wavelets ;)).
> I am not very familiar with signal processing. Please can
> you provide a short example ?
> I have attached the data file. The first column corresponds
> with the time, the second column represents the signal.
> Thanks in advance
A wikipedia article states it better than me, so here is a link :
Feel free to ask any question ;)
In fact, what you will do is :
my_ffts = 
fo i in range(n):
with size the size of the sliding window you will use. This will give
you non overlapping FFTs, but you can use overlapping FFT, such as :
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Website : http://matthieu-brucher.developpez.com/
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