Discussion
When does a mobile channel follow Rician rather than Rayleigh statistics?
Answer: B
A dominant line of sight path adds a constant vector to the random scatter, so deep fades become much rarer and the statistics move from Rayleigh towards Gaussian as that component strengthens. The ratio of dominant to scattered power is the Rician k factor. Motion affects the rate of fading rather than its distribution, frequency and environment influence but do not define it, and two base stations are a separate situation. The presence or absence of a dominant path is what selects the distribution.
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