--On 26 May 2001 22:54 +0100 Shu Yan Chan <syc22@cam.ac.uk> wrote: > What is the definition of Power Specturm (of a function., e.g. f(x))? It's the FT of the convolution of f and f*. > Guassian is self-Fourier, but then Dr. Daugman also said that the power > spectrum of gaussian is uniform (white noise)?? No, the power spectrum of normally distributed white noise is constant. Mo