Performance Analysis of RIS-Assisted FSO Communications over Fisher–Snedecor F Turbulence Channels

Applied Sciences

Máximo Morales-Céspedes¹  Caslav Stefanovic¹  Ana García Armada¹ 

[1] Department of Signal Theory and Communications, Universidad Carlos III de Madrid, 28911 Leganés, Spain;

关键词: 6G;    beyond 5G;    Fisher–Snedecor ℱ distribution;    FSO communications;    outage probability;    re-configurable intelligent surface (RIS);   

DOI  :  10.3390/app112110149

来源: DOAJ

【 摘 要 】

The Fisher–Snedecor (F-S) $\mathcal{F}$ 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 $\mathcal{F}$ 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-to-end 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 (${\mathcal{M}}_{MGF}$), outage probability (OP), average bit error rate (BER) and ergodic channel capacity $(C_{\gamma })$ of the FSO RIS-ACs system over the F-S $\mathcal{F}$ 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.

【 授权许可】

Unknown