Abstract
Notice of Retraction-----------------------------------------------------------------------After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of APTIKOM's Publication Principles.We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.The presenting author of this paper has the option to appeal this decision by contacting ij.aptikom@gmail.com.----------------------------------------------------------------------- Launching into the next generation of wireless communication network (5G network) requires secure high data rate, high speed and huge bandwidth links. With the tremendous increase in broadband users, the existing communication systems such as radio frequency (RF) and microwave links cannot meet up with the challenges due to their link interference and low bandwidth. A current technology that promises such requirements and more is Free Space Optical (FSO) communication. The FSO basically involves the transmission of signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. It is designed to complement the traditional fibre optical communication links. However, location-variant atmospheric channel degrades the quality and performance of an FSO system under severe atmospheric conditions. This paper attempts to assess both fog- and rain-induced attenuation on the performance of FSO link in a terrestrial terrain using measured visibility and rain rate data at Akure, Nigeria. 5-year (2012-2016) archived visibility data and measured rain rate data of 1-minute integration time obtained from Nigerian Meteorological Agency (NIMET) and the Department of Physics, Federal University of Technology, Akure respectively, were used to compute the fog- and rain-induced specific attenuations using Kruse and Carboneur models. The performance of the FSO system was analyzed through link margin by using the parameters of a commercial optical transceiver, Terescope 5000. Findings from this work will be useful for FSO system design in the area.
Highlights
The advancement in communication technology, internet, calls, data, video teleconferencing, radio and video streaming among others travel hundreds of miles in a short period when converted and sent as light through plastic or glass strands between two terminals
Since the current study focuses on fogand rain-induced attenuations on an Free Space Optical (FSO) link system, detailed account on only these two hydrometeors are presented
Transmission at higher optical wavelengths reduce attenuation on an FSO link, these results revealed that the adoption of a higher operating wavelength becomes less important as the link range increases
Summary
The advancement in communication technology, internet, calls, data, video teleconferencing, radio and video streaming among others travel hundreds of miles in a short period when converted and sent as light through plastic or glass strands between two terminals. This can be effectively achieved through a technology known as fibre optics communication. Radio frequency (RF) and microwave links have been known to provide users mobility within a signal coverage region These two systems have limitations for current secure high data rate and bandwidth demands of modern broadband communication applications. Optical fibre have limitations such as high installation cost, high cost of equipment, long period of installation, long period of right-of-way acquisition to mention but few
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