Power Control for Non-Orthogonal Multiple Access in 5G Cellular Systems

Speaker :
Date: 25/03/2016
Time: 11:00 am - 12:00 pm
Location: LINCS Meeting Room 40


Abstract: Non-orthogonal multiple access (NOMA) is a promising candidate for wireless access in 5G cellular systems, and has recently received considerable attentions from both academia and industry. In a NOMA system, multiple users share the same carrier frequency at the same time, and their messages are decoded via successive interference cancellation (SIC). While the idea of SIC was proposed a long time ago, it is now regarded as a practical solution to wireless networks. For SIC to work properly, the signal-to-interference ratio of each user needs to be high enough for successful decoding and subsequent cancellation. To meet such a requirement, transmitter power control becomes indispensable. This talk focuses on power control for inter-cell interference management in NOMA systems. The classical power control results based on Perron-Frobenius theory of non-negative matrices will be reviewed, and how they can be applied to multi-cell NOMA systems will be presented. For practical application to 5G systems, it is desirable to have distributed algorithms for power control, which will also be discussed.
Biography: Dr. Chi Wan Sung is an Associate Professor in the Department of Electronic Engineering at City University of Hong Kong. He received the BEng, MPhil, and PhD degrees in information engineering from the Chinese University of Hong Kong in 1993, 1995, and 1998, respectively. He has served as editor for the ETRI journal and for the Transactions on Emerging Telecommunications Technologies. His research interests include power control and resource allocation, cooperative communications, network coding, and distributed storage systems.