[CST-2] Information Theory

[Shu Yan Chan]

What is the definition of Power Specturm (of a function., e.g. f(x))?
Is it just the product of its Fourier transform and the conjugate?  i.e.
F(k) F*(k)?  (from last year continuous Maths notes) or is it the Power
spectral density (if not, what is the power density?)?
Or is it the integral of F(k) F*(k) over all frequency?
Guassian is self-Fourier, but then Dr. Daugman also said that the power
spectrum  of gaussian is uniform (white noise)??

Thanks.

Yours,
Shu Yan
syc22@cam.ac.uk