2019年4月26日，加拿大英属哥伦比亚大学Julian Cheng教授应徐正元教授邀请做了一场题为“Fulfilling 5G Ambitions Using UAV-Based FSO Links”的学术报告。报告会由龚晨教授主持，共50余名校内师生参加。此次报告会得到了“中科院无线光电通信重点实验室系列讲座”的支持，由中科大信息科学技术学院、中科院无线光电通信重点实验室承办。
Julian Cheng教授首先提出仅通过使用基于频谱稀缺的RF网络无法很好地解决5G新型数据服务速率快带来的数据爆炸挑战。为了应对这些挑战，随后，Julian Cheng教授结合最近提出的采用自由空间光（FSO）通信的想法，用来建立回程和前沿链路，作为传统光纤通信的替代解决方案。同时，小型无人机（UAV）的最新进展为建立UAV-FSO链路开辟了新的视野。
在报告中，Julian Cheng教授首先提供了基于无人机的FSO通信的最新文献综述，并详细阐述了建立基于无人机的FSO链路通信的原因、应用场景（多级无人机的前传和回传、UAV-FSO时延系统、远程监控、隐式光通信等）、相应的技术挑战（随机波动、波束跟踪等）以及应对此类挑战的提出的系统模型解决方案，给出了其团队所做的研究仿真结果。报告结束后，Julian Cheng教授与在座的老师和同学们进行了深入的交流，达到了学术交流迸发思想的目的。
报告人介绍：
Julian Cheng received his B. Eng. degree in electrical engineering from University of Victoria, Victoria, BC, Canada, M.Sc. (Eng.) degree in Mathematics and Engineering from Queen’s University, Kingston, ON, Ph.D. degree in electrical engineering from University of Alberta, Edmonton, AB, Canada. He is currently a Full Professor in the School of Engineering, Faculty of Applied Science, at The University of British Columbia, Okanagan campus in Kelowna, BC, Canada. His current research interests include wireless communication theory, wireless networks, optical wireless communications, and quantum communications. Dr. Cheng has served as a member of technical program committee for many IEEE conferences and workshops. He co-chaired the 12th Canadian Workshop on Information Theory (CWIT 2011) in Kelowna, Canada. In 2012, he chaired the 2012 Wireless Communications in Banff, Canada. Dr. Cheng also chaired the sixth IEEE Optical Wireless Communications Symposium at the 2015 IEEE Global Communications Conference. He now volunteers as an Area Editor for IEEE Transactions on Communications. In the past, he served as an Associate Editor for IEEE Transactions on Communications,IEEE Transactions on Wireless Communications, IEEE Communications Letters, and IEEE Access, and was a past Guest Editor for a special issue of IEEE Journal on Selected Areas in Communications on optical wireless communications. Currently, he serves as the President of the Canadian Society of Information Theory as well as the Secretary of IEEE Radio Communication Technical Committee within the IEEE Communication Society.
