Here are some useful resources regarding the Fourier Transform as well as some useful resources on Matlab’s FFT: Intute – Full record – Intuitive explanation of Fourier theory The tutorial covers basic principles of the representation of space by frequency, higher harmonics, the optical Fourier transform and Fourier filtering. Keywords – uncontrolled: Fourier theory; Fourier [...] . . . → Read More: Fourier Transform Tutorial and Matlab Resources