So I've been trying to read up on it and I've googled around all day with no success.

I just can't figure out what i'm supposed to do for FFT.

I've been going off this paper:

http://www.limsater.com/files/ocean.pdf

But when I get to the equation for FFT there are variables like e that aren't referenced anywhere else, I have no idea what variables i'm supposed to pass to it.

Any help/insight would be greatly appreciated.

Thanks,

Justin.