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The impact of channel imperfection and multiple eavesdroppers on security of dual-signal selection in AF-relay systems

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Abstract

This paper investigates the impact of channel imperfection and multiple eavesdroppers on the secrecy performance of dual-signal selection in amplify and forward-relay systems. This paper derives the lower-bound closed-form expressions of the dual-signal selection for the secrecy outage probability. This work also derives the asymptotic secrecy outage probability expressions of the dual-signal selection for four scenarios and quantifies the secrecy diversity order. Using the asymptotic analysis, we observe that the dual-signal selection provides the secrecy diversity order gain of \({\mathrm{UM}}_{\mathrm{T}}\) compared to the conventional relay-signal scheme in the presence of channel imperfection. Finally, we find that the parameters of eavesdropper such as \({{\mathrm{E}}}\) and \({\mathrm{M}}_{{\mathrm{E}}}\) do not significantly affect the secrecy performance of the dual-signal selection.

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Acknowledgements

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2021R1A2C1092138)

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  1. Department of Electronics Engineering, Chosun University, Gwangju, South Korea

    Donghun Lee

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  1. Donghun Lee
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Correspondence to Donghun Lee.

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Lee, D. The impact of channel imperfection and multiple eavesdroppers on security of dual-signal selection in AF-relay systems. Wireless Netw 28, 1531–1540 (2022). https://doi.org/10.1007/s11276-022-02907-z

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