What is the correct order to put into ifft

Dear community,

I've got a problem and I hope you can help me out.

I am taking a time signal, transfer it by the fft(uf,nsamp) into the frequency domain. There I am using the nsamp/2 first entries and do some calculations.

Finally, I would like to get the resulting time signal. To get a longer time signal, I also do some interpolation to have finer frequency samples df and zero padding.

I have seen a lot of different versions on the internet, but still don't know which is best. What's the right way to get the time signal?

    ut= ifft([uf zeros fliplr(conj(uf))])

Can I use the symmetric flag? Or is it enough to take

ut = ifft([uf zeros],nsamp2))

I appreciate your help!

Answer 1

[Abhishek Ballaney]

https://in.mathworks.com/help/matlab/ref/ifft.html