Abstract
Reliable broadband communication requires secure high data rate and bandwidth links. With the observed increase in broadband users, known communication systems such as RF and microwave links cannot promise such requirements due to link interference and low bandwidth. A current communication system that promises such requirements and more is Free Space Optical (FSO) communication. This system basically involves the transmission of signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. However, location-variant atmospheric channel degrades the performance of an FSO system under severe atmospheric conditions, thus necessitating local atmospheric attenuation studies. This paper presents the characterization of both fog- and rain-induced attenuation and the performance of an FSO system in a terrestrial terrain at Akure, Nigeria. One-year archived visibility data and in-situ measured 1-minute integration time rain rate data obtained from Nigerian Meteorological Agency (NIMET) and the Department of Physics, Federal University of Technology, Akure were used to compute the fog- and rain-induced specific attenuations using Kruse model and Carboneur model respectively. The performance of the FSO system is analyzed through link margin by using the parameters of a commercial optical transceiver, Terescope 5000.
Highlights
In the simplest form, communication is the transfer of information from one point to another through a transmitting medium
Since the current study focuses on fog- and rain-induced attenuations on an Free Space Optical (FSO) link system, detailed account on only these two hydrometeors are presented
Fog and Visibility Fog is a product of suspended cooled air close to the surface of the earth
Summary
In the simplest form, communication is the transfer of information from one point to another through a transmitting medium. There are different transmitting media for conveying signals from a transmitter to receiver, which is the basis for the different types of communication technologies that exist today. With advancement in communication technology, calls and data travel hundreds of miles in a short period when converted and sent as light through plastic or glass strands between two terminals in a form of communication is referred to 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, etc
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