Tutorials

"Robust Multiuser MIMO Transceiver Design Under Channel Uncertainty"
by Michael Botros Shenouda, Timothy N. Davidson, Lutz Lampe

Abstract

Employing multiple antennas in multiuser communication systems has the potential to increasing the achieved data rates and improving the overall system performance. However, many of these potential gains depend on the amount of channel state information available (CSI) at both the transmitter and the receiver. In many systems, the CSI that is available at the transmitter suffers from inaccuracies that are caused by errors in channel estimation and/or limited, delayed or erroneous feedback, and the performance of many multiuser systems are particularly sensitive to uncertainties in the CSI. These uncertainties can result in multiuser systems that are dominated by interference, and hence in a significant degradation of the quality of service (QoS) offered to the users and their data rates. Due to the inevitability of imperfect CSI, robust communication schemes that take into account the channel uncertainty are of interest in practice. The goal of the tutorial is to provide a unified exposition of the theoretical results regarding efficient design of multiuser systems that explicitly take into account these uncertainties. This unification is provided through the theories of robust and convex optimization. It will be demonstrated that by incorporating robustness in the design one can significantly reduce the sensitivity of multiuser systems to channel uncertainties and mitigate their deleterious effects.

Biography

Michael Botros Shenouda received the B.Sc. (Hons. 1) degree and the M.Sc. degree in Electrical Engineering from Cairo University in 2001 and 2003, respectively. He received the Ph.D. degree from McMaster University, Canada in 2008. His main areas of interest include wireless and MIMO communication, robust and convex optimization, and signal processing algorithms. He is also interested in majorization theory and its application in the unification of designs for non-linear MIMO transceivers.
Mr. Botros Shenouda was awarded an IEEE Best Student Paper Award at ICASSP 2006, and was also a finalist in the IEEE Best Student Paper competition at ICASSP 2007. He was the recipient of two provincial scholarships during his PhD degree. Dr. Botros Shenouda has also received the National Science and Engineering Council of Canada (NSERC) Postdoctoral Fellowship, and he holds Killam Postdoctoral Fellowship at the University of British Columbia.

Tim Davidson received the B.Eng. (Hons. I) degree in Electronic Engineering from the University of Western Australia (UWA), Perth, in 1991 and the D.Phil. degree in Engineering Science from the University of Oxford, U.K., in 1995. He is currently an Associate Professor in the Department of Electrical and Computer Engineering at McMaster University, Hamilton, Ontario, Canada, where he holds the (Tier II) Canada Research Chair in Communication Systems, and is currently serving as Acting Director of the School of Computational Engineering and Science. He is also a Registered Professional Engineer in the Province of Ontario. Dr. Davidson?? research interests lie in the general areas of communications, signal processing and control. He has held research positions at the Communications Research Laboratory at McMaster University, the Adaptive Signal Processing Laboratory at UWA, and the Australian Telecommunications Research Institute at Curtin University of Technology, Perth, Western Australia. Dr. Davidson was awarded the 1991 J. A. Wood Memorial Prize (for ??he most outstanding [UWA] graduand??in the pure and applied sciences) and the 1991 Rhodes scholarship for Western Australia. He is currently serving as an Associate Editor of the IEEE Transactions on Signal Processing and as an Editor of the IEEE Transactions on Wireless Communications. He has also served as an Associate Editor of the IEEE Transactions on Circuits and Systems II, and as a Guest Co-editor of issues of the IEEE Journal on Selected Areas in Communications and the IEEE Journal on Selected Topics in Signal Processing.

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Lutz Lampe (S'98, M'02, SM' 08) received the Diplom (Univ.) and the Ph.D. degrees in electrical engineering from the University of Erlangen, Germany, in 1998 and 2002, respectively. Since 2003 he has been with the Department of Electrical and Computer Engineering at the University of British Columbia, where he is currently an Associate Professor. His main research interests lie in the areas of communications and information theory applied to wireless and power-line transmission. Dr. Lampe has been awarded a UBC Killam Research Prize in 2008. He is co-recipient of the Eurasip Signal Processing Journal Best Paper Award 2005, the Best Paper Award at the IEEE International Conference on Ultra-Wideband (ICUWB) 2006, and the Best Student Paper Awards at the European Wireless Conference 2000 and at the International Zurich Seminar 2002. In 2003, he received the Dissertation Award of the German Society of Information Techniques (ITG). Dr. Lampe is an Editor for the IEEE Transactions on Wireless Communications and the International Journal on Electronics and Communications (AEUE). He has served as an Associate Editor for the IEEE Transactions on Vehicular Technology from April 2004 to June 2008. He was Guest-Editor for the EURASIP Journal on Advances in Signal Processing Special Issue on Power Line Communications (vol. 2007) and ELSEVIER Physical Communication Journal Special Issue on Advances in Ultra-Wideband Wireless Communications (publication in September 2009). He serves as Vice-Chair of the IEEE Communications Society Technical Committee on Power Line Communications and as Sectetary of the IEEE Communications Society Communication Theory Technical Committee. He was General Chair of the 2005 International Symposium on Power Line Communications and Its Applications (ISPLC 2005), TPC Co-Chair of the Communication Theory Symposium of the 2009 IEEE International Conference on Communications (ICC 2009) , the General Symposium of the 2006 IEEE Global Telecommunications Conference (Globecom 2006) , the MIMO Symposium of the 2006 International Wireless Communications and Mobile Computing Conference (IWCMC 2006), and the 2007 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC 2007). He has been a TPC member for numerous international conferences. He currently is the General Chair of the 2009 IEEE International Conference on Ultra-Wideband (ICUWB 2009) in Vancouver, Canada. Dr. Lampe is a Senior Member of the IEEE, a member of the German Association of Electrical Engineers (VDE) and of the Association of Professional Engineers and Geoscientists of BC (APEGBC).