研究目的
Investigating the physical-layer security of a mixed RF/FSO dual-hop communication system under η–μ fading for RF links and M-distribution fading for FSO links, focusing on average secrecy rate and secrecy outage probability for fixed- and variable-gain relaying schemes.
研究成果
The study demonstrates that increasing the parameter β in the M-distribution improves secrecy performance for both fixed and variable gain relaying schemes. At high SNRs, variable gain schemes show zero floors in SOP, indicating performance limits. The derived analytical results provide a general framework for assessing physical-layer security in mixed RF/FSO systems under generalized fading conditions.
研究不足
The analysis assumes eavesdropping only occurs at the RF link due to the high security of FSO links, which may not hold in all scenarios. The models are based on specific fading distributions (η–μ and M-distribution), and the results are derived for integer values of μ, potentially limiting generality. Future work could extend to UAV-based systems and other fading models.
1：Experimental Design and Method Selection:
The study uses analytical methods to model and analyze the secrecy performance of mixed RF/FSO systems. Theoretical models include η–μ fading for RF channels and M-distribution fading for FSO links, with derivations for average secrecy rate (ASR) and secrecy outage probability (SOP) using mathematical functions like Meijer G-function and confluent hypergeometric function.
2：Sample Selection and Data Sources:
No empirical data or samples are used; the analysis is purely theoretical based on defined channel models and parameters.
3：List of Experimental Equipment and Materials:
No specific equipment or materials are mentioned; the work is simulation and analysis-based.
4：Experimental Procedures and Operational Workflow:
The procedure involves deriving analytical expressions for ASR and SOP under fixed and variable gain relaying schemes, followed by numerical evaluation of these expressions to generate performance plots.
5：Data Analysis Methods:
Data analysis involves numerical computation of derived integrals and functions, with results plotted to demonstrate secrecy performance versus signal-to-noise ratios (SNRs).
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