Why should I use 2 fftshift?
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Hello if I have signal x (in time domain).
I saw that sometimes people do fftshift(fft(ffshift(x))). Now, I understand the usage of fftshift to move the DC to the center. But what's the reasoning behind using fftshift twice?
Seems to me that fftshift(fft(x)), should be enough.
Am I missing something here?
Thanks
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Walter Roberson
2015-7-31
You can test it yourself to see if the two are equal.
The magnitudes of the two are equal, but the real and imaginary components are different.
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