Adaptive hybrid free space optical/radio frequency communication system

Muhammad Nasir Khan () and Mohsin Jamil ()
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Muhammad Nasir Khan: The University of Lahore
Mohsin Jamil: National University of Sciences and Technology (NUST)

Telecommunication Systems: Modelling, Analysis, Design and Management, 2017, vol. 65, issue 1, No 9, 117-126

Abstract: Abstract Wireless communication has achieved lot of attention and the demand is continually increasing day by day. Radio frequency (RF) is highly attracted by various wireless communication applications. The RF spectrum is already very crowded and the rapid increase in the use of wireless services has led the problems of RF spectrum exhaustion and eventually RF spectrum deficit. Free space optical (FSO) communication is a viable technology with a plenty of bandwidth, license-free spectrum and interference free link. On the other hand, FSO channel is severely corrupted by atmospheric turbulence and non-predictive weather scenarios. We suggest a hybrid FSO/RF communication system in our previous research, which can mitigate the issues of the individual links. In this research, we investigate the performance of the proposed adaptive system for reliable data transmission. We develop modulation and power adaptive schemes for maximizing the mutual information. The proposed adaptive system is compared with non-adaptive system, which gives 2.75 dB gain for the joint power and 0.75 dB gain for the separate power constraint.

Keywords: Adaptive modulation; Adaptive systems; Communication system performance; Digital signal processors; Optical communication (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s11235-016-0217-8

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