On the performance of hybrid line of sight RF and RF-FSO fixed gain dual-hop transmission systems
Type
Conference PaperKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Communication Theory Lab
Date
2014-12Permanent link to this record
http://hdl.handle.net/10754/565006
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In this work, we carry out a unified performance analysis of a dual-branch transmission system composed of a direct radio-frequency (RF) link and a dual-hop fixed gain relay over the asymmetric links composed of both RF and unified free-space optics (FSO) under the effect of pointing errors. RF links are modeled by the Nakagami-m fading channel and the FSO link by the Gamma-Gamma fading channel subject to both types of detection techniques (i.e. heterodyne detection and intensity modulation with direct detection (IM/DD)). Selection combining (SC) and maximum ratio combining (MRC) diversity schemes are investigated. More specifically, for the SC method, we derive new unified closed-form expressions for the cumulative distribution function (CDF), the probability density function (PDF), the moment generating function (MGF), the moments, the outage probability (OP), the average bit-error rate (BER) of a variety of binary modulations, and the ergodic capacity for end-to-end signal-to-noise ratio (SNR). Additionally, using the MGF-based approach, the evaluation of the OP, the average BER, and the ergodic capacity for the MRC diversity technique can be performed based entirely on the knowledge of the MGF of the output SNR without ever having to compute its statistics (i.e. PDF and CDF). By implementing SC or MRC diversity techniques, we demonstrate a better performance of our system relative to the traditional RF path only. Also, our analysis illustrates MRC as the optimum combing method. All the analytical results are verified via computer-based Monte-Carlo simulations.Citation
Zedini, E., Ansari, I. S., & Alouini, M.-S. (2014). On the performance of hybrid line of sight RF and RF-FSO fixed gain dual-hop transmission systems. 2014 IEEE Global Communications Conference. doi:10.1109/glocom.2014.7037121Conference/Event name
2014 IEEE Global Communications Conference, GLOBECOM 2014ISBN
9781479935116ae974a485f413a2113503eed53cd6c53
10.1109/GLOCOM.2014.7037121