Ergodic secrecy rate and outage probability in NOMA IRS massive MIMO networks with jamming.

This research paper considers a wireless system that assumes massive multiple-input multiple-output (MIMO) technical solutions for the Base Station (BS), while both near and far users have just one antenna. This study primarily aims to examine the security implications of the physical layer in this system using Non-Orthogonal Multiple Access (NOMA) along with an Intelligent Reconfigurable Surface (IRS). It is assumed that the BS broadcasts signals to pairs of NOMA users, and both categories of users also receive signals from the IRS. Additionally, the far user is regarded as untrusted, while the jammer is present. Moreover, to assess the confidentiality performance of the studied system, the Ergodic Secrecy Rate (ESR) and Secrecy Outage Probability (SOP) are considered, and their closed-form expressions are provided. Our findings indicate that the integration of IRS leads to an exponential enhancement in the ESR, consequently reducing the SOP. Additionally, our observations highlight the superior efficiency of networks featuring a jamming mechanism. Furthermore, the employment of a massive multi-antenna setup amplifies the transfer Signal-to-Noise Ratio (SNR), leading to heightened ESR and a simultaneous reduction in the SOP.