讲座题目：Physical-layer challenges in cellular networks
主　  讲：Dongning Guo 
时　  间：2012年01月06日上午10点 
地　  点：电三楼314 
主办单位：中国科学技术大学研究生院、电子工程与信息科学系

摘要：The wireless industry is facing the great challenge of meeting rapidly increasing traffic demand due to smart phones. In this talk I first review successful technologies that have significantly increased the capacity of cellular networks in the past few decades.  I discuss major challenges in the physical layer and possible solutions proposed in recent years. I then focus on the use of multiple antennas at mobile and base stations to exploit  spatial diversity. I discuss the optimization of beamformers at all stations using an uplink-downlink bidirectional training scheme, which can adapt to ( unknown) channel variations. With sufficient training, the scheme approaches the maximum degrees of freedom of multiuser MIMO channels. This is joint  work with my colleague Michael Honig at Northwestern University and our  former PhD student Mingguang Xu.

主讲人简介：Dongning Guo joined the faculty of Northwestern University,  Evanston, IL, in 2004, where he is currently an Associate Professor in the Department of Electrical Engineering and Computer Science. He received the B.Eng. degree from the University of Science & Technology of China, the M.Eng.  degree from the National University of Singapore, and the M.A. and Ph.D. degrees from Princeton University, Princeton, NJ. He was a R&D Engineer in the Center for Wireless Communications, Singapore, from 1998 to 1999. He has held visiting positions at Norwegian University of Science and Technology in summer 2006 and Chinese University of Hong Kong in 2010-2011. He is an  Associate Editor of IEEE Transactions on Information Theory in the area of  Shannon Theory.　

Dongning Guo is a recipient of the National Science Foundation Faculty Early Career Development (CAREER) Award in 2007.  He also received the Huber and Suhner Best Student Paper Award in the International Zurich Seminar on  Broadband Communications in 2000 and is a co-recipient of the IEEE Marconi Prize Paper Award in Wireless Communications in 2010 (with Y. Zhu and M. Honig). His student co-author Lei Zhang received the 2011 International Symposium on Information Theory Student Paper Award. His research interests are in information theory, communications, and networking.