Discussion
What does the log normal shadowing term in a mobile model represent?
Answer: D
Buildings and terrain make the local median loss vary about the model's prediction, and that variation is well described by a log normal distribution with a standard deviation of six to ten decibels. Coverage is then quoted for a percentage of locations. Fast fading is modelled separately as Rayleigh, weather is a minor factor at these frequencies, and model uncertainty is a different thing again. Splitting variability into components with distinct statistics is what allows each to be handled with the right mathematics.
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