Performance Evaluation of Survivable Hybrid FSO RF Networks

Abstract

newline Free-Space Optical (FSO) communication uses an optical carrier to transmit data wirelessly. FSO systems can send data quickly, securely, and without frequency regulation. Unfortunately, such linkages are dependent on weather conditions. The irradiance of the received optical LASER beam varies randomly due to vibration caused by atmospheric turbulence. newlineHowever, the extreme effects of weather conditions pose the biggest challenge. Low-visibility fog can generate hundreds of decibels of signal attenuation per kilometer. In these circumstances, introducing Radio Frequency (RF) links to build Free-Space Optics / Radio Frequency (FSO/RF) communications can help increase reliability. When the FSO link is obscured by weather, the RF link maintains dependable communication even at low data rates. Rain and scintillation both have an impact on RF lines, but fog has lowest impact. newlineAs a result, Hybrid FSO/RF technology emerged, which combines both FSO and RF wireless technologies to give solutions for high capacity and mobility demands. newlineThe work in this thesis focuses on the performance evaluation and achievable benefits of advanced modulation techniques, designing parts of transmitter and receiver in terms of power, pointing errors, and enhancing the maximum coverage of Hybrid FSO/RF network. The deployment of high speed networks has various associated issues and challenges. The main challenge for achieving speed, quality and large capacity continuously demand improvement in designing part of high-speed networks. Design of the network components has to be improved in order to meet challenges in implementation of high-speed networks. newlineThe following research objectives have been framed after investigating the issues and challenges associated with hybrid optical networks. newline