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Free-Space Optical (FSO) communication systems have been identified as a complementary solution to resolve the existing "Last mile" problems. Nevertheless, the inherent susceptibility of this technology option to various adverse atmospheric conditions has initiated research interests in hybrid FSO and Radio Frequency (RF) systems. In this paper, the authors investigate the technical advantages of integrating FSO and RF communication technologies via in-depth theoretical and numerical analysis. Their study shows that the effects of fog and rain drastically affect the FSO and RF links, respectively, but only insignificantly vice versa, and rarely occur concurrently, thereby revealing the symbiotic relationship between these technology options to develop new hybrid FSO/RF systems.
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