On the Performance of Hybrid RF and RF/FSO Dual-Hop Transmission Systems

Ansari I. S., Yilmaz F., Alouini M.

2nd International Workshop on Optical Wireless Communications (IWOW), Newcastle-Upon-Tyne, United Kingdom, 21 October 2013, pp.45-46 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/iwow.2013.6777774
  • City: Newcastle-Upon-Tyne
  • Country: United Kingdom
  • Page Numbers: pp.45-46
  • Keywords: Asymmetric dual-hop relay system, optical wireless communications, free-space optical (FSO) communications, CHANNELS
  • Yıldız Technical University Affiliated: No


In this work, we present the performance analysis of a dual-branch transmission system composed of a direct radio frequency (RF) link and a dual-hop relay composed of asymmetric RE and free-space optical (FSO) links The FSO link accounts for pointing errors and both types of detection techniques (i.e. intensity modulation/direct detection (IM/DD) as well as heterodyne detection). The performance is evaluated under the assumption of selection combining (SC) diversity scheme. RE links are modeled by Rayleigh fading distribution whereas the FSO link is modeled by a unified Gamma-Gamma fading distribution. Specifically, we derive new exact closed-form expressions for the cumulative distribution function, probability density function, moment generating function, and moments of the end-to-end signal-to-noise ratio of such systems in terms of the Meijer's G function. We then capitalize on these results to offer new exact closed-form expressions for the outage probability, higher-order amount of fading, average error rate for binary and M-ary modulation schemes, and ergodic capacity, all in terms of Meijer's G functions.