IoT Seminar | Reconfigurable Intelligent Surfaces 2.0: Beyond Diagonal Phase Shift Matrices
Supporting the below United Nations Sustainable Development Goals:支持以下聯合國可持續發展目標：支持以下联合国可持续发展目标：
Reconfigurable intelligent surface (RIS) has gained much traction due to its potential to manipulate the propagation environment via nearly passive reconfigurable environments. Much attention has been drawn to the use of RIS 1.0 architectures based on diagonal phase shift matrices where each element of the RIS is connected to a load disconnected to the other elements. This talk argues that to truly exploit the benefits of RIS, RIS needs to depart from this conventional approach based on diagonal phase shift matrices. We introduce the RIS 2.0 based on beyond-diagonal phase shift matrices and show the benefits of such architectures in terms of controlling both amplitudes and phases of reflected waves, enabling flexible modes, boosting sum-rate and enlarging wireless coverage, etc. To design RIS 2.0, the talk bridges network analysis based on microwave theory, wireless communications, and optimization.
Hongyu Li (S’18) received the B.S. degree in electronics and information engineering and the M.S. degree in information and communication engineering from Dalian University of Technology, Dalian, China, in 2018 and 2021, respectively. She is now studying toward the Ph.D. degree with the Department of Electrical and Electronic Engineering, Imperial College London, U.K. She was a visiting Ph.D. student with the Laboratory of Signals and Systems (L2S) of Paris-Saclay University, CNRS, CentraleSupelec, Paris, France, in 2023.
Her current research interests include signal processing, wireless communications, and reconfigurable intelligent surface.