2023/01/10 by Hong Ren, Zhiwei Chen, Ren, Hong +9 · 1 citation
Computer Science · Engineering · Mathematics · #Advanced Wireless Communication Technologies #Amplifier #Antenna Design and Analysis #Base station #Channel (broadcasting) #Computer science #Constraint (computer-aided design) #Electrical engineering #Electronic engineering #Engineering #FOS: Computer and information sciences #Fading #Information Theory (cs.IT) #Information transfer #Link budget #Maximum power transfer theorem #Physics #Power (physics) #Power budget #Power control #Power transmission #Telecommunications #Transmission (telecommunications) #Transmitter power output #Underwater Vehicles and Communication Systems #Wireless #Wireless power transfer #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.2301.03822
published in arXiv (Cornell University) (Cornell University) · Accepted by IEEE Wireless Communications Letters. Keywords: Reconfigurable intelligent surface (RIS), active RIS, wireless information and power transfer (SWIPT)
arxiv created 2023/01/10 · openalex publication_date 2023/01/10 · arxiv updated 2023/01/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Reconfigurable intelligent surface (RIS) is a revolutionary technology to enhance both the spectral efficiency and energy efficiency of wireless communication systems. However, most of the existing contributions mainly focused on the study of passive RIS, which suffers from the ``double fading'' effect. On the other hand, active RIS, which is equipped with amplifiers, can effectively address this issue. In this paper, we propose an active RIS-aided simultaneous wireless information and power transfer (SWIPT) system. Specifically, we maximize the weighted sum rate of the information receivers, subject to the minimum power received at all energy receivers, amplification power constraint at the active RIS, and the maximum transmit power constraint at the base station (BS). By adopting alternating optimization framework, suboptimal solutions are obtained. Simulation results show that the active RIS-aided SWIPT system has higher performance gain with the same power budget.