Shadowing fade margin and coverage probability analysis for HAP mobile communication systems

An existing elevation dependent shadowing model for high-altitude platform HAP mobile communication in built-up areas is employed to perform the area coverage probability analysis and fading margin computation for HAP mobile communication systems. A generalized expression for the PDF of the received signal power in the HAP coverage is derived. The shadowing fade margin model that can characterize different types of built-up area is developed. Theoretical relations between shadowing fade margin and outage probability and cell coverage probability are given. Numerical simulation for isoflux coverage HAP-based system shows that there is great difference in the value of shadowing fade margin under line-of-sight and non-line-of-sight conditions for the same outage probability. It is also found that the cell coverage probability is insensitive to the variance of the shadowing fade margin in suburban environment whatever the size of the cell and for small cells in urban high-rise environments.Copyright © 2012 John Wiley & Sons, Ltd.

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