Outage probability of non-orthogonal multiple access with partial relay selection over Nakagami-m fading channels

Non-orthogonal multiple access (NOMA) is considered as one of the candidate techniques to be implemented in 5G communication networks. In this paper, a dual-hop amplify-and-forward NOMA relaying network with partial relay selection protocol over Nakagami-m fading channels is studied. Closed-form expressions for the outage probability are derived, and also lower and upper bounds are obtained under high signal-to-noise ratio approximation. Numerical results are corroborated with Monte Carlo simulations.