Journal Publisher: Physical Communication (Elsevier)
Research key words: Decode-and-forward relaying, Hyper-Gamma fading, Gamma-Gamma turbulence, Physical layer security, Eavesdropper
Authors: Noor Ahmad Sarker and Mst Fateha Samad.
Published Year: 2021
Published Link: https://www.sciencedirect.com/science/article/abs/pii/S1874490721002147
Key Points About Paper:
The position of the eavesdropper is always hard to predict by man-made assumptions. It is often a case of cooperative communication affected by more than one eavesdropper.
In this work, a cooperative link of radio-frequency (RF) and free-space optics (FSO) is considered which is severely attacked by multiple eavesdroppers in the physical layer.
Both generalized Hyper-Gamma (HG) and unified Gamma-Gamma (ГГ) fading models are considered as RF and FSO links, respectively, where both links are connected via a decode-and-forward (DF) relaying mechanism.
In addition to different fading parameters of both links, the impact of eavesdroppers on the mixed channel based on their numbers as well as signal-to-noise ratios (SNRs) are investigated.
The system model used in this work has shown profound novelty over many existing works under the RF-FSO research.
All analyses have been done based on three major secrecy performance metrics, namely probability of strictly positive secrecy capacity (PSPSC), secure outage probability (SOP), and average secrecy capacity (ASC).
Besides, asymptotic analysis of SOP has been done in the high SNR region by formulating the Meijer's G function.
Finally, all analytical results are validated via Monte-Carlo simulation results using MATLAB software.