Performance Analysis of NOMA Systems in Relay-Assisted Cognitive Radio Networks

In this study, the performance of non-orthogonal multiple access systems (NOMA) in relay assisted cognitive radio (CR) networks is investigated. Mathematical inferences in the proposed system model are obtained by deriving the closed-form equations of the outage probability for the far and near users by considering exponentially distributed channels. The outage probability performances of the relay and cognitive users are analyzed with 10
⁶
repeated Monte Carlo simulations, considering the distance between nodes, power allocation coefficient, interference power, and exponential distribution parameters.