WNCG Seminar Series with Ted Rappaport

Friday, February 27, 2015
UTA 7.532

Millimeter wave wireless propagation and communications system design

This talk provides an overview of historic wideband radio propagation measurements and channel models in Austin and New York City for evolving millimeter wave wireless networks, and demonstrates an important flaw in earlier 4G wireless channel models developed in the 3GPP standard body.

The past approach has not allowed different groups to easily compare and use large scale path loss models for easy application in interference, capacity or system design. Further, many in the industry confuse the physical mechanisms of radio propagation when attempting to use or interpret the current models used in 3GPP.

This talk shows how measurements in Austin and New York City prove that a very simple distant-dependent path loss model, where a 1 m free space reference distance is used for both line of sight (LOS) and non line of sight (NLOS) environments,  provides virtually identical results to all past path loss models, and has the important additional benefit of allowing many parties to easily compare and use such models across multiple environments and multiple frequency bands  without confusion or loss of accuracy. We demonstrate the virtue of this simple model by introducing the Distant Extension exponent (DEE), a new parameter that shows the increase in coverage/range due to multibeam combining at the mobile user. The large scale propagation path loss model is based in physical reality, as the first meter of propagation is where the greatest difference in radiated power occurs throughout the millimeter wave (mmWave) bands.


New York University

Theodore (Ted) S. Rappaport is the David Lee/Ernst Weber Chaired Professor of Electrical and Computer Engineering at the Polytechnic Institute of New York University (NYU-Poly) and is a Professor of Computer Science at New York University’s Courant Institute of Mathematical Sciences. He is also a Professor of Radiology at the NYU School of Medicine. He also serves as the founding director of NYU WIRELESS. Earlier in his career, he founded two of the world’s largest academic wireless research centers: the Wireless Networking and Communications Group (WNCG) at the University of Texas at Austin in 2002, and the Mobile and Portable Radio Research Group (MPRG), now known as Wireless@Virginia Tech, in 1990. He has advised or launched numerous high-tech companies in the wireless communications and computing fields, including Telephia (acquired by Nielsen), Motion Computing, Paratek Microwave (acquired by Research in Motion), and two university spin-out companies that developed some of the technologies now used in the wireless industry--TSR Technologies (acquired by Allen Telecom in 1993) and Wireless Valley Communications (acquired by Motorola in 2005). He has conducted pioneering research in the fields of wireless communications and smart antennas, most recently in the field of millimeter wave wireless communication networks and 5G wireless.

Rappaport is a pioneer in the fields of radio wave propagation for cellular and personal communications, wireless communication system design, and broadband wireless communications circuits and systems at millimeter wave frequencies. His research has influenced many international wireless standard bodies over three decades, and he and his students have invented measurement equipment, simulation methodologies, and analytical approaches for the exploration and modeling of radio propagation channels and communication system design in a vast range of spectrum bands for emerging wireless systems. He also invented the technology of site-specific radio frequency (RF) channel modeling and design for wireless network deployment-a technology now used routinely throughout the wireless industry. More recently, his work has explored the millimeter wave (mmWave) bands for future broadband access.

Rappaport has served on the Technological Advisory Council of the Federal Communications Commission, assisted the governor and CIO of Virginia in formulating rural broadband initiatives for Internet access, and conducted research for NSF, Department of Defense, and dozens of global telecommunications companies throughout his career. He is one of the most highly cited authors in the wireless field, having published over 200 technical papers and over 20 books, and is a highly sought-after expert. He has over 100 patents issued or pending. As a faculty member, Rappaport has advised approximately 100 students who continue to accomplish great things in the communications, electromagnetics, and circuit design fields throughout industry, academia, and government.