NDLI: Spatial diversity techniques for non-line-of-sight ultraviolet communication systems over atmospheric turbulence channels

Content Provider	IET Digital Library
Author	Hariq, Sayed Hasan Odabasioglu, Niyazi
Abstract	Rich scattering of ultraviolet signals enables the non-line-of-sight outdoor wireless connectivity and eliminates the line-of-sight requirement of free-space optical links. Besides scattering losses, ultraviolet signals also suffer from the atmospheric turbulence-induced fading. One of the strong fading mitigation techniques is the spatial diversity, which has been extensively studied in the context of wireless radio frequency and infrared networks. In this study, spatial diversity techniques for non-line-of-sight ultraviolet communication links are considered. In particular, multiple-input-single-output (MISO), single-input-multiple-output (SIMO), and multiple-input-multiple-output (MIMO) non-line-of-sight ultraviolet communication systems are derived. The BER performance of the single-input-single-output (SISO) link is also derived as a benchmark. The accuracy of the derivations is confirmed through Monte Carlo simulations. The results demonstrate the significant performance improvements in spatial diversity schemes over SISO counterparts. The authors further investigate the effect of spatial correlation on the performance of non-line-of-sight ultraviolet links with spatial diversity. They demonstrate that the spatial correlation degrades the performance significantly, and efficient separation between apertures is crucial to achieve the maximum diversity gain.
Starting Page	327
Ending Page	336
Page Count	10
ISSN	17518768
Volume Number	14
e-ISSN	17518776
Issue Number	Issue 5, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-opt/14/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-opt.2020.0005
Journal	IET Optoelectronics
Publisher Date	2020-06-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Atmospheric Turbulence Atmospheric Turbulence Channel Bit-error-rate Performances Diversity Reception Error Statistics Free Space Optical Link Line-of-sight Requirement MIMO Communication Monte Carlo Method Multiple-input–multiple-output Nonline-of-sight Outdoor Wireless Connectivity Nonline-of-sight Ultraviolet Communication Link Nonline-of-sight Ultraviolet Communication System Nonline-of-sight Ultraviolet Link Optical Communication Optical Link Radio Link And Equipment Single-input–single-output Link Spatial Correlation Spatial Diversity Scheme Spatial Diversity Technique Statistics Strong Fading Mitigation Technique Ultraviolet Signal Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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