Hello everybody, I'm getting ready to start a Master in Electronics and I know that I'll be using the Fourier Transform and Fast Fourier Transform (FFT), but I have been away from my books for more than 12 years and I want to be ready for this courser. The question is what do I need to study before facing the FFT? I mean which topics do I need to know very well before starting this course? Any suggestions on what could be the path to follow? Thank you all.