Publication: Performance Analysis of RIS-Assisted FSO Communications over Fisher-Snedecor F Turbulence Channels
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2021-11-01
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MDPI
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Abstract
The Fisher Snedecor (F-S) F distribution has recently been introduced as a tractable
turbulence-induced (TI) fading model that fits well with the experimental data. This paper provides a
performance evaluation of a free-space optical (FSO) re-configurable intelligent surface (RIS)-assisted
communications (ACs) link over the F-S F TI fading channels, assuming the intensity modulation
direct detection (IM DD) technique. In particular, novel and closed-form (C-F) analytical expressions
for the probability density function (PDF) and cumulative distribution function (CDF) of the end-toend signal-to-noise ratio (SNR) in terms of Gaussian hyper-geometric functions are efficiently derived.
Capitalizing on the obtained results, novel C-F analytical expressions for the moment generating
function (MMGF), outage probability (OP), average bit error rate (BER) and ergodic channel capacity
(Cgamma) of the FSO RIS-ACs system over the F-S F TI fading channels are provided and numerically
evaluated under the various TI fading severity conditions. Furthermore, the second-order (S-O)
statistical expressions for the level crossing rate (LCR) and average fade duration (AFD) are obtained
and thoroughly examined for various FSO RIS-ACs system model parameters.
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Keywords
6G, Beyond 5G, Fisher-snedecor f distribution, FSO communications, Outage probability, Re-configurable intelligent surface (ris)
Bibliographic citation
Stefanovic, C., Morales-Céspedes, M., & Armada, A. G. (2021). Performance Analysis of RIS-Assisted FSO Communications over Fisher–Snedecor F Turbulence Channels. Applied Sciences, 11(21), 10149.