# Obtaining power distribution of faded signal

If I want to obtain the power distribution from an amplitude fading distribution (whether it is Ricean, Rayleigh or Nagakami fading), do I simply do the following ?

1. Find the mathematical relation between the power and amplitude (which in most cases is p=r^2 where p=signal power, r= signal envelope/amplitude)

2. Derive the expression for p, i.e. dp/dr = 2r

3. Make dp the subject, i.e. dp = 2rdr

4. Integrate the envelope pdf over dp, using dp=2rdr

regards
James