Electrical and Computer Engineering Seminar Series

Statistical Design and Analysis of RIS-aided Mobile Communications

Speaker

Professor Peter Smith

Institute

School of Mathematics and Statistics, Victoria University of Wellington

Time & Place

Fri, 21 May 2021 14:00:00 NZST in Link 309 Lecture Theatre

Abstract

In this talk we will consider reconfigurable intelligent surfaces to be controllable reflectors which alter the phase of electromagnetic signals to assist with wireless communication. Put simply, your mobile/laptop may struggle to obtain good data rates in some locations and a RIS can “focus” the radiation to enable a better data rate. Whether this idea is a topic for academics with no grip on reality or an important new technology is unclear. Certainly, there are already start-up companies in this area and the number of academic papers is growing rapidly (from 16 in 2017-2019 to 348 in 2020-2021).


While materials experts and hardware designers develop prototypes and run laboratory tests, there are many unsolved mathematical and statistical problems concerning the performance of RIS systems. How do we design the RIS to control the signals? What is the performance of the system measured by SNR or data rate? All of this work is stochastic as wireless channels are notoriously unpredictable.

In this talk I will motivate the RIS design, discuss some design optimization problems and show some recent results on the SNR distribution of an optimal RIS design for single user systems. Old friends such as correlated Rayleigh and Ricean variables play a major role in the analysis.  This is joint work with two research teams, one at VUW and one at UC.

 

ECE POSTGRADUATE STUDENTS ARE EXPECTED TO ATTEND

 

REFRESHMENTS WILL BE PROVIDED