On Secure Cognitive Radio Networks with NOMA: Design of Multiple-Antenna and Performance Analysis

This paper presents the secrecy performance of Cognitive Radio (CR) networks by enabling non-orthogonal multiple access (NOMA) in downlink. The multiple-input and single output (MISO) architecture with transmit antenna selection (TAS) strategy is considered. In particular, physical layer security of CR-NOMA is studied to achieve secure performance analysis such as the secrecy outage probability (SOP). Furthermore, optimal power allocation factor can be obtained to show optimal value of SOP. Monte-Carlo simulations are performed to verify the proposed analytical results.