Presenters:
Aryan Kaushik, Manchester Metropolitan University, UK, and RakFort, Ireland
Marco Di Renzo, Paris-Saclay University, France
Hirofumi Sasaki, NTT, Inc., Japan
Doohwan Lee, NTT, Inc., Japan
Abstract:
This tutorial offers a comprehensive exploration of wave-domain signal processing technologies for 6G systems, focusing on integrated sensing enabled by space-time coding metasurfaces and programmable wavefront control to support dual-function operations and non-terrestrial network integration for satellite and UAV communications through beam tracking, dynamic interference management, and sensing-assisted transmission. It covers key topics such as RF chain and quantization optimization, wave-domain signaling for holographic, stacked, and flexible index modulation, and IM-aided ISAC for NTN applications, alongside recent advances in intelligent metasurfaces including space-time coding metasurfaces, beyond-diagonal RIS architectures, holographic and flexible IM, and integration with cell-free massive MIMO, supported by experimental demonstrations such as the first stacked IM prototype for integrated sensing. The tutorial further examines advanced beam manipulation techniques that exploit novel electromagnetic wave properties, including orbital angular momentum beams achieving terabit-per-second data rates in sub-THz bands, Airy beams enabling interference-free spatial multiplexing, and Bessel beams supporting extended-range communications. It also addresses photonics-assisted communications through sub-THz wideband circuit design and optical Butler matrix architectures for two-dimensional beamforming and scalable multi-beam transmission. By integrating electromagnetic theory, intelligent metasurface technology, photonics, and experimental validation, the tutorial bridges theory and practice to present a forward-looking perspective on wave-domain signal processing as a foundational paradigm for 6G, equipping attendees with a comprehensive understanding of integrated sensing, intelligent metasurfaces, and advanced beam techniques to drive future wireless innovations.
Biographies :
Aryan Kaushik has served as Chief Innovation Officer at RakFort, Ireland, since 2025 and has been an Associate Professor at Manchester Metropolitan University since 2024, following his role as Assistant Professor (Senior Grade) at the University of Sussex from 2021 to 2024. He is actively involved in international standardization and professional leadership, including as a Core Member of the IEEE P1955 Standard on 6G-Empowering Robotics, Chair of the IEEE ComSoc Emerging Technologies Initiative on ESIT, Co-Chair of the IEEE ComSoc SIG on AITNTN, Vice Chair of one6G WG3, and Founding Member of the IEEE ComSoc SIG on FAS. He also serves on the Elections Committee of the IEEE ComSoc UK & Ireland Chapter. He has edited five books with Elsevier and Wiley on topics such as ISAC, NTN, intelligent metasurfaces, and digital twins, and serves on the editorial boards of several leading IEEE journals. He has delivered over 125 invited, keynote, and tutorial talks worldwide and has played major organizational roles in numerous flagship IEEE conferences, including serving as General Chair of more than 30 workshops and special sessions.
Marco Di Renzo (Fellow, IEEE) received his Laurea (cum laude) and Ph.D. degrees in electrical engineering from the University of L’Aquila, Italy. He is a CNRS Research Director and leads the Intelligent Physical Communications group at Paris-Saclay University in collaboration with CNRS and CentraleSupélec. He serves on multiple institutional committees, including the L2S Board Council and Ph.D. School Admission Committee, and is the Academic Vice Chair of the ETSI Industry Specification Group on Reconfigurable Intelligent Surfaces. A Fellow of IEEE, IET, EURASIP, and AAIA, he is also a member of major European academies. His international distinctions include the France-Nokia Chair at the University of Oulu and the Tan Chin Tuan Exchange Fellowship at NTU Singapore. His awards include several IEEE and EURASIP Best Paper Awards, the IEEE Heinrich Hertz Award, and the IEEE Marconi Prize Paper Award. He previously served as Editor-in-Chief of IEEE Communications Letters and currently holds senior leadership roles within the IEEE Communications Society.
Hirofumi Sasaki is a Distinguished Researcher at NTT Network Innovation Laboratories, where he focuses on high-capacity wireless communications in millimeter-wave and terahertz bands. His research spans mmWave, THz, and optical communications, electromagnetic information theory, THz waveguide design, and digital signal processing for wireless systems. He has received multiple honors from the Institute of Electronics, Information and Communication Engineers, including Best Paper Awards and the Young Researcher’s Award. He has contributed to the organization of several IEEE GLOBECOM workshops on high-capacity wireless communications, serving in key coordination roles.
Doohwan Lee is a Senior Distinguished Researcher at NTT Network Innovation Laboratories. He has held academic appointments as a full-time lecturer at the University of Tokyo and a part-time lecturer at Kanagawa University. His work has been recognized with numerous awards from IEICE and related organizations, including Best Paper Awards, Technical Exhibition Awards, the Distinguished Contributions Award, the ComEX Best Letter Award, and the Radio Achievement Award from Japan’s Ministry of Internal Affairs and Communications. He has served as general co-chair for multiple workshops at major IEEE conferences such as ICC, GLOBECOM, PIMRC, and VTC, and was co-chair of the IEEE ComSoc Asia-Pacific Board Membership Development Committee in 2022 and 2023.