# How to take inverse fft of windowed and callibrated fft data? [closed]

I have done windowing and fft on a signal but when I try to recover original raw signal ,I am unable to do it .Can anybody help me. How to take inverse fft of windowed and callibrated fft data? Thanks in advance....

## closed as unclear what you're asking by Marcus Müller, MBaz, lennon310, jojek♦Mar 19 at 8:37

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• It's a bit unclear what you need help with. The IFFT is nearly the same operation as the FFT, and if you've done the FFT with some existing library, that library most definitely brings an IFFT itself. – Marcus Müller Mar 13 at 10:45
• BTW, $\text{IFFT} \lbrace W(f) \ast X(f) \rbrace \neq x(t)$. Windowing modifies the signal, so you can't get the "original raw" signal $x(t)$ back. – MBaz Mar 13 at 13:42