 | Prof. Minghua XiaSun Yat-sen University, China Minghua Xia received the Ph.D. degree in Telecommunications and Information Systems from Sun Yat-sen University, Guangzhou, China, in 2007. From 2007 to 2009, he was with the Electronics and Telecommunications Research Institute (ETRI) of South Korea, Beijing R&D Center, Beijing, China, where he worked as a member and then as a senior member of the engineering staff. From 2010 to 2014, he was in sequence with The University of Hong Kong, Hong Kong, China; King Abdullah University of Science and Technology, Jeddah, Saudi Arabia; and the Institut National de la Recherche Scientifique (INRS), University of Quebec, Montreal, Canada, as a Postdoctoral Fellow. Since 2015, he has been a Professor at Sun Yat-sen University. Since 2019, he has also served as an Adjunct Professor at the Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai). His research interests are in the general areas of wireless communications and signal processing. He is currently serving as an Associate Editor for IEEE Communications Letters and China Communications. Speech Title: Autonomous UAV Swarms for Air-to-Ground Networks: From Reactive Coverage to Autonomous Mission Execution Abstract: Air-to-ground wireless networks are evolving from static coverage provisioning toward autonomous, adaptive systems. However, dynamic user mobility, fluctuating traffic demand, and unpredictable coverage holes fundamentally limit the effectiveness of traditional optimization-based approaches. In this talk, we present a unified framework for autonomous UAV swarm systems, which transforms coverage provisioning from a static placement problem into a closed-loop process involving sensing, decision-making, control, and execution. We first introduce a geometric and control-theoretic approach to UAV swarm formation and tracking, enabling cooperative service for both static and mobile users. We then develop a perception-driven coverage recovery framework, where UAVs actively detect coverage holes and dynamically deploy either a single UAV or a coordinated swarm. Finally, we integrate these components into a closed-loop architecture and discuss its system-level implications.This talk highlights a fundamental shift from reactive coverage optimization to autonomous mission execution, and opens new research directions in cross-layer UAV systems. |
 | Assoc. Prof. Tianming Ma (Senior member & life member of CIE, Senior member of CIC, Council member of SHIE)Shanghai University of Engineering Science, China Tianming Ma received the Ph.D degree from Shanghai institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai, China, in 2012. He was a post-doctoral researcher and obtained the first-class general financial grant from the China Postdoctoral Science Foundation in Tsinghua University, Beijing, China from 2012 to 2014. Now he is an associate professor in the School of Electronic & Electrical Engineering (SEEE) at Shanghai University of Engineering Science (SUES), Shanghai, China and serves as the leader of the intelligent wireless perception research team in SEEE. He has authored/co-authored over 60 journal/conference papers and held 10 Chinese authorized invention patents as the first inventor or as a mentor for graduate students, of which 3 have already achieved technology transfer. He is a member of IEEE ComSoc & IEEE SPS, a senior member of CIC, a senior member & life member of CIE, a life member of SCS, a council member of SHIE, and the main contract person of RISTA. He has served more than 30 times as an OC member/TPC member/Track Chair/Session Chair/Special Session Chair/Workshop Chair/ Symposium Co-Chair/Publicity Chair/Program Committee Chair/Moderator/Invited Speaker of many prominences international conferences and received several Outstanding Organization Awards. He has also served as an official reviewer for many renowned journals in the field of communications both domestically and internationally, such as IEEE TWC, IEEE TVT, IEEE CNCOMM, IEEE CL, IEEE SPL, CJE, JC, JEIT, JSEE, JCIN, JCUPT, JXU, etc. His current interests include 6G waveform modulation technologies & multiple access technologies. Speech Title: RIS-Aided Multiuser ODDM over Doubly-Selective Channels with Interference: Reliable and Energy Efficient Hybrid Precoding and Phase-Shift Design Abstract: Orthogonal delay-Doppler modulation (ODDM) provides robust performance in high-mobility communication scenarios, yet it suffers from significant path loss in obstructed propagation environments. Reconfigurable intelligent surfaces (RISs) can effectively address this limitation by establishing virtual line-of-sight links, but their integration with ODDM systems for energy-efficient communication remains unexplored. This work initiates the study of energy efficiency (EE) optimization in RIS-aided ODDM systems over doubly-selective channels, where a multi-user multiple-input single-output (MU-MISO) framework with interference is considered. A joint optimization framework is proposed to maximize the EE, where the transmit precoder at the BS and the phase-shift matrices at the RIS are co-designed under quality of service (QoS) and unit-modulus constraints. To address the non-convex fractional objective, we develop an alternating optimization (AO) algorithm that incorporates Dinkelbach's method, where the precoding subproblem is convexified by introducing auxiliary variables and exploiting binomial inequalities, and the RIS phase shifts admit a closed-form solution via exploiting complex conjugate symmetry. Numerical results demonstrate that our proposed scheme achieves substantial EE improvement over baseline schemes, while simultaneously delivering superior BER performance--confirming that the EE gains are achieved without compromising link reliability. |