Secure Communication in Aerial IRS-Assisted NOMA Systems with Friendly Jamming

Abstract

In this work, we investigate the secrecy performance of a wireless network that enables an aerial intelligent reflecting surface-unmanned aerial vehicle for non-orthogonal multiple access (NOMA) transmissions in the presence of a friendly jammer. For a practical NOMA-based system with imperfect successive interference cancellation, we develop a theoretical framework for the secrecy outage probability (SOP) and the strictly positive secrecy capacity. However, the derived expressions are complex and therefore, do not provide important insights into the system design. In this regard, explicit and simplified formulas of the asymptotic SOP are derived under high signal-to-noise ratio conditions for scenarios with and without jamming. Through extensive simulations, we verify the correctness of the proposed theoretical framework. Notably, numerical results reveal the superior performance of the jamming-enabled system over its non-jamming counterpart and demonstrate the efficacy of the proposed scheme.