Performance Analysis of RIS-Assisted FSO Communications over Fisher-Snedecor F Turbulence Channels Articles uri icon

publication date

  • November 2021

start page

  • 1

end page

  • 18

issue

  • 21

volume

  • 11

International Standard Serial Number (ISSN)

  • 2076-3417

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
    (Cγ) 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.

keywords

  • 6g; beyond 5g; fisher-snedecor f distribution; fso communications; outage probability; re-configurable intelligent surface (ris)