Where should I set my anti-aliasing filter corner frequency for this signal? I have a Fourier transform of an arbitrary digital signal. The transform has For 1024 frequency bins. The magnitude plot of the first 100 is below, with no surprises in the unplotted 924 bins.



Now, suppose that I want to design a single-pole anti-aliasing filter for this signal. How would one approach selecting a corner frequency for that filter?
Suppose if your sampling rate is fs, then the corner frequency of the Anti Aliasing filter would be fs/2