ECE Seminar - Beyond Diagonal Reconfigurable Intelligent Surfaces: A New Frontier in Wave Domain Processing
Reconfigurable intelligent surface (RIS) is expected to be a key technology in future wireless systems to manipulate the propagation environment and perform processing and computation in the electromagnetic wave domain efficiently and cost-effectively. In conventional RIS, each RIS element is independently controlled by a tunable load disconnected from the other elements. Thus, conventional RIS results in a diagonal scattering matrix, also known as a phase shift matrix, which has limited passive beamforming and wave control capabilities. To enhance the flexibility of RIS, beyond diagonal RIS (BD-RIS) has been introduced as a generalization of conventional RIS, in which the scattering matrix is not restricted to being diagonal. In this talk, I review the emerging concept of BD-RIS, showing its promising benefits in terms of performance, coverage, deployment, and flexibility in wave manipulation over conventional RIS and STAR-RIS. We discuss the modelling and architectures of BD-RIS, and compare the performance and circuit complexity of BD-RIS architectures with conventional RIS. We also discuss potential applications of BD-RIS in various wireless communications and sensing systems and its implementation in Stacked Intelligent Metasurfaces, and outline future research directions for the special interest group on BD-RIS in IEEE Communication Society https://sites.google.com/view/ieee-comsoc-rcc-sig-bdris .
Bruno Clerckx is a (Full) Professor, the Head of the Communications and Signal Processing Group, and the Head of the Wireless Communications and Signal Processing Lab, within the Electrical and Electronic Engineering Department, Imperial College London, London, U.K. He received the MSc and Ph.D. degrees in Electrical Engineering from Université Catholique de Louvain, Belgium, and the Doctor of Science (DSc) degree from Imperial College London, U.K. He spent many years in industry with Silicon Austria Labs (SAL), Austria, where he was the Chief Technology Officer (CTO) responsible for all research areas of Austria's top research center for electronic based systems and with Samsung Electronics, South Korea, where he actively contributed to 4G (3GPP LTE/LTE-A and IEEE 802.16m). He has authored two books on “MIMO Wireless Communications” and “MIMO Wireless Networks”, 300 peer-reviewed international research papers, and 150 standards contributions, and is the inventor of 80 issued or pending patents among which several have been adopted in the specifications of 4G standards and are used by billions of devices worldwide. His research spans the general area of wireless communications and signal processing for wireless networks. He received the prestigious Blondel Medal 2021 from France for exceptional work contributing to the progress of Science and Electrical and Electronic Industries, the 2021 Adolphe Wetrems Prize in mathematical and physical sciences from Royal Academy of Belgium, multiple awards from Samsung, IEEE best student paper award, and the EURASIP (European Association for Signal Processing) best paper award 2022. He is a Fellow of the IEEE and the IET.
Zoom Link : https://hkust.zoom.us/j/95528627402?pwd=aFEA6OYLHh6jAhOgZl9Xha854wm33q.1
Meeting ID: 955 2862 7402
Passcode: 819672