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University of Hawaii

Electrical Engineering

Propagation Modeling for 5G and Beyond: Challenges and Opportunities

Date: 2020-09-11           Add to Google Calendar
Time: 11:00am - 12:00pm
Location: Zoom, contact for details
Speaker: Zhengqing Yun, Associate Professor, HAWTI

Presented by College of Engineering Professors & Pizza Series

When wireless service providers started the implementation of 5G networks almost one year ago, the first 6G summit was held in Finland in March last year. The evolution of the wireless communications technology has been at an astonishing pace since 1980s. In this seminar, we look at the challenges of propagation modeling facing the eras of 5G, 6G, and beyond. A tendency in the development of wireless networks is the use of higher frequency bands, from megahertz to giga-, tera-hertz, and light. This increase of frequency has significant effects on the propagation of electromagnetic waves in wireless channels. The range that a base station can cover is much shorter while the fine architectural structures of buildings in urban environments cannot be ignored due to their more pronounced role in governing the wave propagation. Another feature of the evolution is the need to integrate vastly heterogenous networks and make them cooperate to realize true IoT (Internet of things). Wireless channels for these diverse networks will involve (in addition to urban/indoors), e.g., satellite to ground, ship to costal base stations, (autonomous) vehicles to vehicles, among drones/robots, and so on. Furthermore, the employment of antenna arrays with many elements (massive MIMO) and, most recently, the use of intelligent surfaces creates new scenarios for the propagation environments. The propagation modeling demands new strategies and algorithms to meet the challenges. In this seminar, we describe a high-frequency method (ray optics or ray tracing) that can serve as a backbone of propagation modeling and prediction for many of these different channels. To achieve accurate and real-time simulation goals, expertise in different areas is very much needed such as GIS (geospatial data), computer science (algorithms), civil engineering (traffic/sensors), architecture (buildings), big data (space/time) and AI, and more. Some of our existing and currently in development simulation results and tools will be presented and discussed.

Associate Professor Yun


Associate Professor of Electrical Engineering and Hawaii Advanced Wireless Technologies Institute (HAWTI), University of Hawaii at Manoa

Education: Ph.D., Electrical Engineering, Chongqing University, China, 1994
Dr. Yun’s research interests include: propagation prediction and simulation for wireless communications systems including 3G, MIMO, Wireless LAN, and UWB systems; research and development of new computational methods for simulation of electromagnetics (Ray-tracing, FDTD, FEM, and BEM); detection of UXO and IED; ground penetration radar; analysis and design of antenna arrays (2D beam steering antennas, CTS technology); simulation of interaction of radio waves with the human head.