Performance Enhancement of Dual-Stage NOMA Over Relay-Assisted Power Line Communication

This paper studies the average sum rate and outage probability performance of a dual-stage (DS) cooperative non-orthogonal multiple access (NOMA) over power line communication (PLC), which supports two destination nodes. The network setup also consists of one source modem and one decode-and-forward relay modem. This is in contrast with the existing model DS NOMA in the literature, which considers a single destination node. The data to the destination modems are served by the source and relay using NOMA, over two time slots. We derive the closed-form expressions for the average sum rate and the outage probabilities at the relay and destination nodes for the proposed system. Further, we validate our analysis through numerical methods and Monte Carlo simulations. Moreover, we show that the proposed system offers a performance enhancement over the existing setup in terms of the average sum rate, at the expense of overall outage probability.