Achievable Rate Analysis for Opportunistic Non-orthogonal Multiple Access-Based Cooperative Relaying Systems

Abstract

In this paper, we propose the opportunistic non-orthogonal multiple access (NOMA)-based cooperative relaying system (CRS) with channel state information (CSI) available at the source, where CSI for the sourceto-destination and source-to-relay links is used for opportunistic transmission. Using the CSI, for opportunistic transmission, the source instantaneously chooses between the direct transmission and the cooperative NOMA transmission. We provide an asymptotic expression for the average achievable rate of the opportunistic NOMA-based CRS under Rayleigh fading channels. We verify the asymptotic analysis through Monte Carlo simulations, and compare the average achievable rates of the opportunistic NOMA-based CRS and the conventional one for various channel powers and power allocation coefficients used for NOMA.

New Approaches to Advanced Network and Image Processing

“…Lee and Lee [26] suggest the cooperative relaying system (CRS) based on opportunistic non-orthogonal multiple access (NOMA) with channel state information (CSI). Non-orthogonal multiple access (NOMA) is one of the superior techniques for improving the spectral efficiency of wireless multi-user systems [27].…”