Statistical and Instantaneous CSI based Outage Performance Analysis for DL-NOMA

Abstract

In 5G and beyond, Non-Orthogonal Multiple Access (NOMA) can provide a promising alternative for multiple access. An arbitrary number of users on a single carrier multi-user NOMA DL system is analysed using closed-form outage probabilities in this paper. User order has been obtained for statistical CSI assumed at the base station and Instantaneous CSI assumed at both base station and receiver. Both user-ordering schemes are examined extensively for different data rates targeted at a given fixed SNR for individual users' QoS requirements. The system model is tested by simulations, which reveal that the Instantaneous CSI-based user ordering scheme yields superior results over the Statistical CSI-based user ordering scheme.