Transmission Design for Active RIS-Aided Simultaneous Wireless Information and Power Transfer

Reconfigurable intelligent surface (RIS) is a revolutionary technology to enhance both the spectral efficiency and energy of wireless communication systems. However, most existing contributions mainly focused on study passive RIS, which suffers from “double fading” effect. On other hand, active equipped with amplifiers, can effectively address this issue. In letter, we propose an RIS-aided simultaneous information power transfer (SWIPT) system. Specifically, maximize weighted sum rate receivers, subject minimum received at all amplification constraint maximum transmit base station (BS). By adopting alternating optimization framework, suboptimal solutions are obtained. Simulation results show that SWIPT system has higher performance gain same budget.