Abstract-In this letter, we consider a large-scale multipleinput multiple-output (MIMO) system where the receiver should harvest energy from the transmitter by wireless power transfer to support its wireless information transmission. The energy beamforming in the large-scale MIMO system is utilized to address the challenging problem of long-distance wireless power transfer. Furthermore, considering the limitation of the power in such a system, this letter focuses on the maximization of the energy efficiency of information transmission (bit per Joule) while satisfying the quality-of-service (QoS) requirement, i.e. delay constraint, by jointly optimizing transfer duration and transmit power. By solving the optimization problem, we derive an energyefficient resource allocation scheme. Numerical results validate the effectiveness of the proposed scheme. Index Terms-Energy-efficient resource allocation, wireless information and power transfer, large-scale MIMO system, energy beamforming, QoS guarantee.
In REF , the authors assumed a large-scale MIMO system and maximized energy efficiency of information with energy beamforming in the system.
Energy-Efficient Optimization for Wireless Information and Power Transfer in Large-Scale MIMO Systems Employing Energy Beamforming
IEEE Wireless Communications Letters
IEEE Wireless Communications Letters
Computer Science Mathematics