Department Seminar: Information Theoretic Framework for Relay Networks with Wireless Power Transfer (WPT) 11/21 12-1pm

Professor Omer Waqar

University of  Toronto

Information Theoretic Framework for Relay Networks with Wireless Power Transfer (WPT)

Date: Wednesday November 21st 12-1pm

Location: LAS 3033

Lunch will be provided.


Manual replacement or recharging batteries is the main obstacle for widespread deployment of energy-constrained networks such as Internet of Things (IoT). Thus perpetual energy operation has become an inevitable requirement for commercial success of these networks. To this end, wireless power transfer (WPT) is a promising way to prolong the energy lifetime of these networks. Keeping this in mind, we are interested to discuss two main paradigms for WPT i.e., simultaneous wireless information and power transfer (SWIPT) and wireless powered communications (WPC). Moreover, we present various practical receiver architectures and protocols for wireless energy harvesting (EH). In the first part of talk, new approximations for the sum capacity of the decode-and-forward (DF) based multiple-input-multiple-output (MIMO) relay network will be presented with three different SWIPT protocols. Moreover, it will be shown that there exists an optimum number of antennas at the relay that maximizes the sum capacity. In the last part of talk, information theoretic framework will be presented considering wireless powered amplify-and-forward (AF) based relay network with multiple-antenna bidirectional relay. Finally, it will be shown that that low energy transfer efficiency for WPT techniques can be overcome by employing multiple antennas and throughput of such networks can be increased through an optimal combination of information beamforming and energy beamforming.


Omer Waqar received the B.Sc. degree in Electrical Engineering from the University of Engineering and Technology (UET), Lahore, Pakistan, in 2007 and the Ph.D. degree in Electrical and Electronic Engineering from the University of Leeds, U.K., in November 2011. From January 2012 to July 2013, he was a Research Fellow with the 5G Innovation Center (5GIC), University of Surrey, Guildford, U.K. He is currently a visiting professor at the University of Toronto, Canada and working with Prof. Raviraj Adve. His research interests include energy-efficient design of fifth generation (5G) wireless access networks, performance analysis of multihop relay networks and applications of deep learning and big data for next-generation communication systems. He has published various research papers including IEEE Transactions and conference proceedings.

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