摘要：In this talk, we introduce a new wireless research paradigm by employing a massive number of low-cost passive reflecting elements with controllable amplitude and phase, named intelligent reflecting surface (IRS), which is able to smartly change the wireless signal propagation to enable various functions such as beamforming and interference nulling/cancelation. We illustrate the main applications of IRS in achieving spectrum and energy efficient as well as secure and sustainable wireless networks in the future, and its advantages as compared to existing technologies such as massive MIMO and active relaying. We then present the signal model of IRS by taking into account its hardware limitation in practice. Next, we focus on discussing the main design challenges in IRS-aided wireless networks, including joint active and passive beamforming optimization, channel estimation, IRS deployment, etc., and highlight important research directions for future work.
Dr. Rui Zhang (IEEE Fellow) received the Ph.D. degree from Stanford University in electrical engineering in 2007. He is now a Dean’s Chair Associate Professor in the Department of Electrical and Computer Engineering, National University of Singapore. His current research interests include wireless information and power transfer, UAV communications, and reconfigurable MIMO. He has published over 350 papers, which have been cited more than 30,000 times. He has been listed as a Highly Cited Researcher by Thomson Reuters/Clarivate Analytics since 2015, and was recognized in both the scientific fields of Computer Science and Engineering in 2018. His works have received several IEEE awards, including the IEEE Marconi Prize Paper Award in Wireless Communications, the IEEE Communications Society Heinrich Hertz Prize Paper Award, the IEEE Signal Processing Society Best Paper Award, Young Author Best Paper Award and Donald G. Fink Overview Paper Award. He has served as an Editor for several IEEE journals, including TWC, TCOM, JSAC, TSP, TGCN, etc., and as TPC co-chair or organizing committee member for over 30 international conferences. He is an IEEE Distinguished Lecturer of IEEE Communications Society and IEEE Signal Processing Society.