Error rate and ergodic capacity of RF-FSO system with partial relay selection in the presence of pointing errors

Petkovic, M. I., Ansari, I. S. , Djordjevic, G. T. and Qaraqe, K. A. (2019) Error rate and ergodic capacity of RF-FSO system with partial relay selection in the presence of pointing errors. Optics Communications, 438, pp. 118-125. (doi: 10.1016/j.optcom.2019.01.028)

Abstract

This paper presents an analysis of a multiple dual-hop relaying system, which is composed of km-class radio frequency (RF)-free-space optical (FSO) links. Partial relay selection based on outdated channel state information (CSI) is employed in order to select active relay for further transmission. Amplify-and-forward relaying protocol is utilized. The RF links are assumed to be subject to Rayleigh fading, and the FSO links are influenced by both Gamma–Gamma atmospheric turbulence and pointing errors. On the basis of our previously derived expression for cumulative distribution function of the equivalent signal-to-noise ratio of the whole system, we derive novel analytical expressions for the average bit-error rate (BER) and ergodic capacity that are presented in terms of the Meijer’s G-function and extended generalized bivariate Meijer’s G-function, respectively. The numerical results are confirmed by Monte Carlo simulations. Considering the effect of time-correlation between outdated CSI and actual CSI related to the RF channel at the time of transmission, the average BER and the ergodic capacity dependence on various system and channel parameters are observed and discussed. The results illustrate that the temporal correlation between outdated and actual CSI has strong effect on system performance, particularly on BER values, when FSO hop is influenced by favorable conditions.

• Item Type: Articles
• Additional Information: The work of M.I. Petkovic has received funding from the European Union Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No. 734331. This work was partially supported by the Ministry of Education, Science and Technology Development of the Republic of Serbia under Grants TR-32035, TR-32028 and III-44006, as well as COST Action CA16220.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ansari, Dr Imran
• Authors: Petkovic, M. I., Ansari, I. S., Djordjevic, G. T., and Qaraqe, K. A.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Optics Communications
• Publisher: Elsevier
• ISSN: 0030-4018
• ISSN (Online): 1873-0310
• Published Online: 15 January 2019
• Copyright Holders: Copyright © 2019 Elsevier B.V.
• First Published: First published in Optics Communications 438: 118-125
• Publisher Policy: Reproduced in accordance with the publisher copyright policy