Abstract
Reliability analysis of millimetre-wave radio links operating in an arid climate are presented and used to derive hop length against fade margin charts. Long-term rain and visibility data for Saudi Arabia are used to determine rain and visibility statistics for various regions of the country. Based on the results of measured attenuation at 40 GHz in Riyadh, meteorological statistics are converted into excess attenuation due to rain, sandstorms and multipath fading. Finally, the total outage time due to the three phenomena is depicted as a function of fade margin at various hop lengths. The results are a set of design charts which relate hop lengths, reliability objectives and fade margins for various meteorological regions of Saudi Arabia. The charts are given for frequencies of 30, 40, 50, 60 and 70 GHz.
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