TY - GEN
T1 - Analysis of mixed RF/FSO system with imperfect CSI estimation
AU - Petkovic, Milica
AU - Djordjevic, Goran T.
AU - Djordjevic, Ivan B.
N1 - Funding Information:
This work was supported in part by the Ministry of Education, Science and Technology Development of the Republic of Serbia under Grant TR-32028, and in part by Ministry of Foreign Affairs of Norway under NORBAS project.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - 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 It is concluded that outdated CSI used for relay gain adjustment has an important impact on the mixed RF/FSO system performance.
AB - 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.
KW - Relaying technology
KW - free-space optical systems
KW - imperfect channel state information (CSI) estimation
KW - radio frequency systems
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U2 - 10.1109/ICTON.2017.8024759
DO - 10.1109/ICTON.2017.8024759
M3 - Conference contribution
AN - SCOPUS:85031018095
T3 - International Conference on Transparent Optical Networks
BT - ICTON 2017 - 19th International Conference on Transparent Optical Networks
PB - IEEE Computer Society
T2 - 19th International Conference on Transparent Optical Networks, ICTON 2017
Y2 - 2 July 2017 through 6 July 2017
ER -