Secrecy outage analysis of cognitive NOMA system with control-jamming

Abstract

Wireless communication has advanced significantly over the last couple of decades. The exponential boom of mobile traffic and high-rate data communication services can also bring about additional spectrum scarcity problems in fifth-generation technologies. That’s why several novel technologies for fifth-generation (5G) and beyond wireless communication have been developed. Non-orthogonal multiple access (NOMA) and cognitive radio (CR) are two concepts that have been envisioned as promising candidates to improve spectrum efficiency. NOMA is a different way of using multiplexing to share the spectrum among multiple users. It uses power domain multiplexing to allow different users to share a single resource block. NOMA outperforms traditional Orthogonal Multiple Access (OMA) in terms of spectrum efficiency, connectivity, latency, and fairness. It is also known that CR, in which secondary users (SUs) intelligently change their operating settings to access the spectrum band occupied by primary users (PUs), in an opportunistic manner, makes more efficient use of the wireless spectrum. There are currently three main CR paradigms: 1) Interweave 2) Underlay; and 3) Overlay.