Frequency to Time domain conversion ?

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Arul Thm
Arul Thm on 13 Dec 2015
Commented: Walter Roberson on 14 Dec 2015
I have a excel file of Frequency vs. Magnitude. How to convert into Time vs. Magnitude in Matlab & Simulink?

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Answers (1)

Walter Roberson
Walter Roberson on 13 Dec 2015
If the frequencies are equally spaced, then use ifft()
If the frequencies are not equally spaced, then see NFFT
  2 Comments
Arul Thm
Arul Thm on 14 Dec 2015
Sir, How to apply NFFT?
Walter Roberson
Walter Roberson on 14 Dec 2015
You would need to download the code from the above link and install it.
Other possible reading of interest:
http://www.cims.nyu.edu/cmcl/nufft/nufft.html
http://www.swmath.org/?term=nonequispaced%20fast%20Fourier%20transform
https://www.mathworks.com/matlabcentral/newsreader/view_thread/41005

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