English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

This paper presents an analysis of a multiple dual-hop relaying system, whichis composed of km-class radio frequency (RF)-free-space optical (FSO) links.Partial relay selection based on outdated channel state information (CSI) isemployed in order to select active relay for further transmission.Amplify-and-forward relaying protocol is utilized. The RF links are assumed tobe subject to Rayleigh fading, and the FSO links are influenced by bothGamma-Gamma atmospheric turbulence and pointing errors. On the basis of ourpreviously derived expression for cumulative distribution function of theequivalent signal-to-noise ratio of the whole system, we derive novelanalytical expressions for the average bit-error rate (BER) and ergodiccapacity that are presented in terms of the Meijer's G-function and extendedgeneralized bivariate Meijer's G-function, respectively. The numerical resultsare confirmed by Monte Carlo simulations. Considering the effect oftime-correlation between outdated CSI and actual CSI related to the RF channelat the time of transmission, the average BER and the ergodic capacitydependence on various system and channel parameters are observed and discussed.The results illustrate that the temporal correlation between outdated andactual CSI has strong effect on system performance, particularly on BER values,when FSO hop is influenced by favorable conditions. Keywords: Bit error rate,ergodic capacity, free-space optical systems, partial relay selection, radiofrequency systems.

Error Rate and Ergodic Capacity of RF-FSO System with Partial Relay Selection in the Presence of Pointing Errors