Abstract—Non-Orthogonal Multiple Access (NOMA) aided Cognitive Radio (CR) communication has been investigated as one of the primary candidates to fulfill the huge spectrum requirements of next generation wireless networks. To enhance the reliability and security aspects of CR-NOMA networks, we in this work incorporated cooperative relay-based communication. Cooperative transmission is a promising technology as it can provide reliability, extended coverage, and improved physical layer security. We propose cooperative relaying frameworks for both underlay and overlay cognitive radio frameworks. The primary objective of the work is to enhance the reception reliability of the end users and simultaneously providing the physical layer security against external eavesdropper. Analytical expressions are derived for throughput, secrecy capacity, and intercept probability to depict the performance of cooperative CR-NOMA communication. We have also analyzed the impact of different relaying strategies on the performance of Cooperative CR-NOMA networks. The simulation results prove the effectiveness of proposed frameworks and validates the mathematical modeling derived for various parameters.
 

Index Terms—Cognitive radio, NOMA, Cooperative communication, outage probability and Physical layer security

Cite: Madan H. T. and Prabhugoud I. Basarkod, "Reliable and Secrecy Aware Cooperative Framework for Cognitive Radio Non-Orthogonal Multiple Access (NOMA) Networks," Journal of Communications vol. 17, no. 2, pp. 125-133, February 2022. Doi: 10.12720/jcm.17.2.125-133