|Aug31-07, 01:42 AM||#1|
I am learning a numerical method that involves Fourier transform.
As far as I know, I think Fourier transform is tool to find the frequency spectrum of a signal.
And the usual form shall be
"Integrate from negtive infinity to positive infinity, f(x)*exp(i*w*x)dx"
However, when i search this in wikipedia, it is defined with (w-wo), where wo is the central frequency.
I don't really know what this definition is doing and what changes it would bring.
Why is it necessary to do so?
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