Reconfigurable Intelligent Surface-Aided Wireless Communication Considering Interference Suppression

As the demand for efficient wireless communication grows, radio frequency (RF) wireless communication emerges as a promising solution, facilitated by recent advancements in signal processing. A pivotal technology driving the efficacy of RF wireless communication is the reconfigurable intelligent surface (RIS). RIS enables passive beamforming and beam focusing, eliminating the need for power-hungry active components. In the era of the Internet of Things, electromagnetic environments are teeming with a multitude of devices, increasing the likelihood of interference. In response to this challenge, this paper presents a novel approach that leverages reconfigurable intelligent surfaces to focus power beams precisely on receivers while suppressing interference. Our research results demonstrate that this approach, based on least squares, outperforms nature-inspired optimization methods. The proposed technique not only enhances the efficiency of wireless communication but also ensures interference-free operation in complex electromagnetic environments. This study contributes to the growing body of knowledge in RF wireless communication and reconfigurable intelligent surfaces, offering a robust solution for the emerging IoT landscape.