FFT from CSV data

Hello there,

I have a vibration data on Amplitude vs Frequency and have no idea to apply Fast Fourier Transform (FFT) to revert it back to time domain. Reason being is I would like to acquire Amplitude vs Time data so I can obtain it into Velocity in time domain. If possible can I differentiate the data to transform it into Velocity vs Frequency and/or Acceleration vs Time?

I have no idea where to begin. I would be delighted with any help.

Thank you

[Star Strider]

The phase is uniformly zero. Without the phase information, it is not possible to reconstruct the complex Fourier transform from those data, so the inverse Fourier transform is not possible.

Answer 1

[Vinai Datta Thatiparthi]

Hey Harith,

Adding to @StarStrider's points, when you're able to fix the input data, you can import this Excel sheet into a table in MATLAB using the function readtable. Functions FFT & IFFT can help you.