RIS-assisted wireless communications and hardware based experimentation of wireless energy harvesting systems

Abstract

In contemporary systems, conventional power transmission primarily relies on wired connections. However, technological advancements have spurred the exploration of wireless power transmission possibilities. Wireless power transfer (WPT) has emerged as an innovative paradigm, designed to meet electrical energy requirements by wirelessly delivering power from a source to an electric load. Predominantly based on inductive coupling, WPT technology represents a cutting-edge development in electronics. Nevertheless, induction-based WPT approaches fall short in applications involving wearable devices, hazardous area sensors, and wireless sensor network nodes. To overcome these limitations, simultaneous wireless information and power transfer (SWIPT) technology has been proposed, integrating wireless communication (WIT) with WPT to enable concurrent data and energy transmission over a single electromagnetic wave. This work presents resource allocation algorithms for a reconfigurable intelligent surface (RIS)-assisted orthogonal frequency division multiplexing (OFDM)-based single-user network, featuring end-nodes that support the separated architecture of SWIPT technology. The network leverages OFDM for signal transmission.