On the Sum Rate of MCM-Based NOMA and MCM-Based OMA Systems

In this paper, we report on the performance of different Multi-Carrier Modulation (MCM) techniques combined with both Non-Orthogonal Multiple Access (NOMA) and the conventional Orthogonal Multiple Access (OMA) systems. MCM-NOMA and MCM-OMA systems are analyzed in terms of efficient sum rate in mobility channel. In order to perform a fair comparison, we take into consideration all the different parameters among the MCM techniques, in addition to the distinct resource allocation in both NOMA and OMA systems. In addition, the performance of both MCM-NOMA and MCM-OMA systems is analyzed at different terminals speeds. The comparisons illustrate that all MCM techniques performs better when combined with NOMA systems comparing to OMA based systems. Furthermore, numerical simulations prove that Filter Bank Multi-Carrier (FBMC)-NOMA combination provides the best performance when compared to other MCM techniques in both NOMA and OMA systems.