Abstract
Combination of wireless power transfer and unmanned aerial vehicle (UAV) is considered as an effective solution to achieving sustainable, flexible and energy-efficient communications. In this paper, we study a UAV-enabled multiuser relaying system with simultaneous wireless information and power transfer, where the users are capable of power splitting. Our aim is to jointly optimize the beamforming matrixes of the base station and UAV relay and the power splitting factors of users to maximize the sum harvested energy of users while satisfying the quality of service and the transmit power constraints. We propose an alternating optimization scheme to tackle the intractable no-convex problem. To reduce the computational cost, the low-complexity scheme based on singular value decomposition-zero forcing (SVD-ZF) technique is designed. Moreover, we discuss the convergence and computational complexity of the two proposed schemes. Simulation results verify the effectiveness of the proposed schemes.
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