Analysis of mixed RF/FSO system with imperfect CSI estimation

Milica Petkovic, Goran T. Djordjevic, Ivan B. Djordjevic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations


In this invited paper, we present utilization of free-space optical (FSO) link in overcoming a connectivity gap between the backbone and last mile access networks. The non-line-of-sight area is bridged by radio frequency (RF) link by employing relaying technology, while the FSO link is used to deliver transmission from the relay to the end user. Firstly, a brief recapitulation of main results in the field of mixed dual-hop relaying RF/FSO system is presented. Further, the performance of mixed dual-hop amplify-and-forward (AF) relaying RF/FSO system is analysed. The outage probability expression of investigated system is provided, considering variable gain AF relay when channel state information (CSI) estimation is imperfect. The Nakagami-m fading environment is adopted for RF hop, while the intensity fluctuations of optical signal are assumed to origin from both atmospheric turbulence and pointing errors. Numerical results are presented and validated by Monte Carlo simulations. Effects of different system and channel parameters are observed. It is concluded that outdated CSI used for relay gain adjustment has an important impact on the mixed RF/FSO system performance.

Original languageEnglish (US)
Title of host publicationICTON 2017 - 19th International Conference on Transparent Optical Networks
PublisherIEEE Computer Society
ISBN (Electronic)9781538608586
StatePublished - Sep 1 2017
Event19th International Conference on Transparent Optical Networks, ICTON 2017 - Girona, Catalonia, Spain
Duration: Jul 2 2017Jul 6 2017

Publication series

NameInternational Conference on Transparent Optical Networks
ISSN (Electronic)2162-7339


Other19th International Conference on Transparent Optical Networks, ICTON 2017
CityGirona, Catalonia


  • Relaying technology
  • free-space optical systems
  • imperfect channel state information (CSI) estimation
  • radio frequency systems

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials


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