Abstract

Non-orthogonal multiple access (NOMA) and millimeter wave (mmWave) are two key enabling technologies for fifth generation (5G) wireless networks. In this seminar, we introduce a general performance analysis framework for downlink NOMA transmission in mmWave networks with spatially random users taking into account link blockages and directional beamforming. To facilitate NOMA transmission in mmWave networks, we propose an angle-based user pairing strategy, where the base station first randomly selects one user and then pairs it with the line-of-sight user that has the minimum relative angle difference. The proposed strategy increases the probability that both NOMA users are covered by the main lobe created by directional beamforming. To account for the randomness of link blockages and user locations, we consider dynamic user ordering among the paired NOMA users. Tools from stochastic geometry are utilized to derive the coverage probability, outage sum rate, and ergodic sum rate of the proposed NOMA scheme, where beam misalignment at both the base station and users is taken into account. Simulations validate the performance analysis and show that the proposed NOMA scheme achieves a larger coverage probability and higher outage and ergodic sum rates than conventional NOMA with distance-based user pairing and orthogonal multiple access.
 

Speaker's Biography

Vincent Wong is a Professor in the Department of Electrical and Computer Engineering at the University of British Columbia, Vancouver, Canada. His research areas include protocol design, optimization, and resource management of communication networks, with applications to the Internet, wireless networks, smart grid, fog computing, and Internet of Things. Dr. Wong is currently an Executive Editorial Committee Member of IEEE Transactions on Wireless Communications, an Editor-at-Large of IEEE Transactions on Communications, and an Associate Editor of IEEE Transactions on Mobile Computing. He is a Fellow of the IEEE.