MIMO Wireless Communication Networks: Challenges and Future Perspectives

Dr. Charan Lichtfield
Visiting Professor University of Greenwich, UK

Cerent Engineering Science Complex, Salazar Hall 2009A
3:00 PM

Abstract – MIMO (Multiple Input, Multiple Output) Technology has long been proposed as a means to increase the spectral efficiency of wireless communication systems and it is presently revolutionizing the world of 4G Wireless Broadband Communications. MIMO enables higher information rates by adding spatial dimensionality which can be exploited to send more information rich signals. This has enabled contemporary wireless communication standards (e.g., WiFi and LTE) to operate within the broadband regime. This presentation will introduce MIMO technology showing how this has been applied to LTE (Long Term Evolution) and, furthermore, expatiate on applications in future wireless communication networks as they march towards the fifth generation (5G). A focal point of this presentation is to present research results for MIMO configurations in Wireless Cooperative Networking and Multiple User Overlays in Very Large MIMO Networks, both of which may find application in fifth generation systems. This research utilized a technology called Adaptive Multiuser Detection which is fundamental to enabling Very Large Distributed Arrays be practically feasible at minimal trade off to performance.

Dr. Charan Litchfield is an electrical engineer with over 10 years’ experience in Wireless and Digital Communication Networks. His research interests include MIMO Wireless Communication Systems, Spread Spectrum CDMA, Multiuser Detection, Adaptive Signal Processing, Estimation Theory and Information Theory. He has contributed numerous publications to high impact conferences and journals as well as leading industrial research in 3G networks focusing mainly on CDMA Multiuser Detection and Digital Beamforming. He has held the position of Senior Lecturer in Communication and Computer Networks at the University of Greenwich, UK and is currently consulting on research projects for Newfield Wireless. He obtained a Ph.D. from the University of Kent in 2006 where the title of his dissertation was Single User Receivers for Frequency Selective WCDMA Channels.