Light Fading (K ® ¥)
Very strong dominant component
Rician PDF ®
Gaussian PDF ® d
Severe Fading: Rayleigh Fading
Direct line-of-sight component is small (C ® 0, K ® 0).
The variances of z and x are equal to local-mean power
PDF of amplitude r is Rayleigh
The instantaneous power p (p = 1/2r2 = 1/2z2 + 1/2x2) is exponential