CARLETON WIRELESS SEMINAR SERIES
Date: Wednesday, May 2
Time: 2:30-3:30 pm
Location: Carleton University, 4359 ME (Mackenzie Building), map
Title: MOTIVATING RESEARCH IN WIRELESS COMMUNICATIONS
Speaker: Salama Ikki, Assistant Professor, Lakehead University, Canada
Abstract: Wireless channels have impairments that limit the quality and the capacity of transmission. The
impairments include signal fading, co-channel interference, adjacent channel interference, noise, signal shadowing and propagation loss. Faced with ever increasing demand for user services and finite spectrum (bandwidth) resources, new and improved technologies must be developed to permit future wireless networks to sustain the increasing demands for services. In this talk we are going to shed lights on three new techniques that can be implemented in the future generation for wireless communications networks: Cooperative networks, Massive MIMO, Spatial modulation, and Non-Orthogonal Multiple Access. Moreover, introduction to UAV communications systems will be presented.
Cooperative networks have been recently proposed and are gaining growing interest for future generation wireless standards. They have promise to improve wireless communication capability and provide a new paradigm for the development of efficient bandwidth usage, resulting in a significant increase of the capacity and diversity gain in wireless networks. In cooperative systems, idle users (nodes) are used as relays between the source and the destination.
Massive MIMO is an emerging technology that scales up MIMO by an order of magnitude compared to current state-of-the-art. We think of systems that use antenna arrays with a few tens (or even hundreds) antennas, that simultaneously serve many tens of terminals in the same time frequency resource. The basic premise behind massive MIMO is to reap all the benefits of conventional MIMO, but in a much greater scale. Overall, massive MIMO is an enabler for the development of future broadband (fixed and mobile) networks which will be energy-efficient, secure, and robust, and will use the spectrum efficiently.
Spatial Modulation is an alternative and promising MIMO technique that utilizes the spatial information in a novel fashion. At each time instance, only a single transmit antenna is activated among the set of existing transmit antennas and the activated antenna index is implicitly used to convey information. As compared to other MIMO techniques, spatial modulation is shown to have several advantages among of which are, complete avoidance of inter-channel interference (ICI), relaxed inter-antenna synchronization requirements, low receiver complexity, use of a single RF chain at the transmitter, and enhanced error performance with moderate number of transmit antennas.
As the latest member of the multiple access family, non-orthogonal multiple access (NOMA) has been recently proposed for 3GPP LTE and is envisioned to be an essential component of 5G wireless networks. The main advantage of NOMA is to serve multiple users at the same time/frequency/code, but with different power levels, which results a significant spectral efficiency gain over conventional orthogonal multiple access.
Speaker bio: Salama S. Ikki received the B.S. degree from Al-Isra University, Amman, Jordan, in 1996, the M.Sc. degree from The Arab Academy for Science and Technology and Maritime Transport, Alexandria, Egypt, in 2002, and the Ph.D. degree from Memorial University, St. Johns, NL, Canada, in 2009, all in electrical engineering. From February 2009 to February 2010, he was a Postdoctoral Researcher at the University of Waterloo, ON, Canada. From February 2010 to December 2012, he was a Research Assistant with INRS, University of Quebec, Montreal, QC, Canada. He is currently an Assistant Professor of wireless communications with Lakehead University, Thunder Bay, ON, Canada. He is the author of 100 journal and conference papers and has more than 3200 citations and an H-index of 29. His research interests include cooperative networks, multiple-input-multiple-output, spatial modulation, and wireless sensor networks. Dr. Ikki has served as a Technical Program Committee member for various conferences, including IEEE International Conference on Communications, IEEE Global Communications Conference, IEEE Wireless Communications, and Networking Conference, IEEE Spring/Fall Vehicular Technology Conference, and IEEE International Symposium on Personal, Indoor, and Mobile Communications. He currently serves on the Editorial Board of IEEE COMMUNICATIONS LETTERS and Institution of Engineering and Technology Communications. He received a Best Paper Award for his paper published in the EURASIP Journal on Advanced Signal Processing. Dr. Ikki also received an IEEE Communications Letters, IEEE Wireless Communications Letters and IEEE Transactions on Vehicular Technology exemplary reviewer certificates for 2012, 2012 and 2014, respectively. Webpage: https://sites.google.com/site/salamaikki/