**A short description of “Signal Fading Statistics”**

- The rapid variations (fast fading) in signal power caused by local multipaths are represented by Rayleigh distribution.
- The long-term variations in the mean level are denoted by lognormal distribution.
- With a LOS propagation path, the Rician distribution is often used for fast fading.
- Thus, the fading characteristics of a mobile radio signal are described by the following statistical distributions:

– Rayleigh Distribution

– Rician Distribution

– Lognormal Distribution

#Ref book: Wireless Communication and Networking – V.K. Garg

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