Performance Analysis of User Assisted Relaying Based Cooperative NOMA System

Abstract

In this paper we study a two-user cooperative Non-Orthogonal Multiple Access (C-NOMA) system for downlink transmissions. In this system the user closer to the base station act as a full-duplex relay for the user which is placed away from the base station. Firstly, the performance of C-NOMA with full-duplex relay based system will be analyzed through the closed form expressions of probability of outage by considering static power assignments at base station and user assisted relay. Secondly we investigate the outage performance with variable relay power allocations. In both the analysis we also examine the impact of perfect and imperfect SIC implementation. Simulation based numerical results confirm the applicability of mathematical analysis for both fixed and variable power allocations.