BSc tHESIS

Summary of Thesis:

This research is based on a theoretical security analysis of a unicast dual-hop channel in the presence of multiple eavesdroppers in the physical layer. The first hop of the proposed dual-hop system is a radio frequency (RF) channel which is assumed to experience Hyper-Gamma (HG) fading distribution. On the other hand, the second hop is a free-space optical (FSO) link where the unified Gamma-Gamma (ГГ) fading model is considered. All eavesdropper links are modeled by the same HG distribution as the RF link. Three secrecy performance metrics, namely average secrecy capacity (ASC), secrecy outage probability (SOP), and strictly positive secrecy capacity (SPSC) are derived mathematically to find the analytical result via MATHEMATICA software. Those results are then validated via the Monte-Carlo simulation result using MATLAB software. In numerical results, secrecy investigations show how different parameters of multiple eavesdroppers affect the main channel. Moreover, the impact of various fading parameters like pointing errors, fading severity, atmospheric turbulences, etc. on physical-layer security (PLS) is analyzed. Furthermore, the generality of HG distribution over other multipath fading distributions is shown. Finally, the novelty of the proposed system model is shown over some other existing system models. In conclusion, a future research plan is projected by the extinction of the proposed system model by adding multicasting or multiple parallel relaying configurations. 

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