UAV-Enabled Wireless Backhaul Networks Using Non-Orthogonal Multiple Access

Abstract

Owing to their potential mobility and agility, unmanned aerial vehicles (UAVs) have captured predominant interests in sustaining 5G wireless communication and beyond. In this paper, we scrutinize the downlink transmission of UAV-enabled wireless backhaul networks in which non-orthogonal multiple access is incorporated to boost up the massive connectivity and high spectra efficiency. More precisely, our aim is to maximize the worst ground user's achievable rate by optimizing bandwidth allocation, UAV's power allocation and placement. The formulated problem is non-convex and not easy to solve optimally. Consequently, to deal with the complexity and non-convexity of our problem, we develop a path following procedure and generate a less-onerous algorithm that is iteratively run till convergence. The simulation results are executed to validate not only the effectiveness, but also the convergence of the proposed method. In addition, a comparison with other alternative schemes is depicted to divulge the outperformance of our proposed algorithm.