Relayed FSO communication with aperture averaging receivers and misalignment errors. Issue 1 (1st January 2017)

• Record Type: Journal Article
• Authors: Kumar Sharma, Prabhat; Bansal, Ankur; Garg, Parul; Tsiftsis, Theodoros; Barrios, Ricardo
• Is Part Of: IET communications. Volume 11:Issue 1(2017)
• Page Start: 45
• Page End: 52
• Publication Date: 2017-01-01
• Subjects: decode and forward communication -- free‐space optical communication -- relay networks (telecommunication) -- Monte Carlo methods -- phase shift keying -- Weibull distribution -- fading -- probability -- atmospheric turbulence -- error statistics -- telecommunication network reliability; decode‐and‐forward relay‐assisted free‐space‐optical communication systems -- atmospheric turbulence‐induced fading -- misalignment errors -- aperture‐averaging receivers -- exponentiated‐Weibull distribution -- FSO link -- finite‐sized receiver aperture -- moment generating function -- MGF -- instantaneous signal‐to‐noise ratio -- outage probability -- average symbol error rate -- subcarrier intensity‐modulated M‐ary phase‐shift keying -- Monte Carlo simulations -- relayed FSO communication systems; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2016.0253
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : In this study, the performance of decode‐and‐forward relay‐assisted free‐space‐optical (FSO) communication systems under atmospheric turbulence‐induced fading and misalignment errors is investigated. To mitigate the adverse effects of the atmospheric turbulence, the aperture‐averaging receivers are considered both at the relay and destination sides. The atmospheric turbulence‐induced fading is modelled via the exponentiated‐Weibull distribution, which has recently been proposed to characterise an FSO link in the presence of finite‐sized receiver aperture. The expression for the moment generating function (MGF) of the instantaneous signal‐to‐noise ratio is derived. Furthermore, new closed‐form expression for the outage probability is obtained. Moreover, the new expression for the average symbol error rate of the subcarrier intensity‐modulated M ‐ary phase‐shift keying is obtained using the MGF‐based approach. Finally, numerical examples are discussed and all the derived analytical results are corroborated by Monte Carlo simulations.