Enhancing Average Secrecy Capacity and Secure Energy Efficiency of SISO System Using RIS with Artificial Jamming over Nakagami-m Fading Channels

Ty Vo Ta; Duy Tran Trung; Son Pham Ngoc; Hoang Tran Manh

doi:10.21553/rev-jec.413

Enhancing Average Secrecy Capacity and Secure Energy Efficiency of SISO System Using RIS with Artificial Jamming over Nakagami-m Fading Channels

Ty Vo Ta, Duy Tran Trung, Son Pham Ngoc, Hoang Tran Manh

Abstract

This paper investigates the average secrecy capacity (ASC), secure energy efficiency (SEE) of a single-input single-output (SISO) system assisted by a reconfigurable intelligent surfaces (RIS) and with/without artificial jamming (AJ). We conduct a detailed ASC and SEE of the proposed system under Nakagami-m fading channels. First, we derive the cumulative distribution function (CDF) of the SNR for jamming and non-jamming schemes. The derived CDFs are then used to obtain closed-form theoretical expressions for ASC and SEE. Moreover, the effect of imperfect successive interference cancellation (SIC) at legitimate receivers has been taken into account to better reflect realistic system implementations. The numerical evaluations confirm that the proposed RIS-Jammer-SISO scheme consistently achieves superior secrecy performance when compared to the RIS-Only configuration. A comprehensive analysis has also been conducted to examine the impact of key system parameters, including the number of reflecting elements, jammer positioning, carrier frequency, and SIC accuracy. Finally, the validity of the analytical results has been corroborated through extensive Monte Carlo simulations.

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DOI: http://dx.doi.org/10.21553/rev-jec.413

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