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For a nonfading signal component present, the small scale fading envelope distribution is ____________

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For a nonfading signal component present, the small scale fading envelope distribution is ____________

(a) Rayleigh

(b) Gaussian

(c) Log normal

(d) Ricean

I had been asked this question in homework.

This intriguing question comes from Rayleigh and Ricean Distribution topic in division Mobile Radio Propagation: Small – Scale Fading and Multipath of Wireless/Mobile

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The correct answer is (d) Ricean

To explain: The small scale fading envelope is Ricean when there is a dominant stationary (nonfading) signal component, such as line of sight propagation path. In such a situation, random multipath components arriving at different angles are superimposed on a stationary dominant signal.

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