FULL-DUPLEX RELAYING MULTI-USER NOMA SYSTEM UNDER IMPACTS OF REALISTIC CONDITIONS

In this article, we derive the exact performance expressions of the system performance in terms of outage probability and ergodic capacity for multi-user of a downlink non-orthogonal multiple access (NOMA) systems with a full-duplex decode-and-forward relay R over the Nakagami-m fading channels. For the considered FDR-NOMA system, we evaluate the impacts of realistic parameters of imperfect residual self-interference (RSI) cancellation, successive interference cancellation (SIC), and channel state information (CSI). The results of the Monte-Carlo simulation are provided to validate the accuracy of numerical analysis and show the potential to double the capacity of the FDR-NOMA system compared to the half-duplex NOMA (HDR-NOMA). Furthermore, we investigate the optimal position of the relay R to reach maximum capacity.