讲座题目：Novel Chirp Spread Spectrum Methods for Low-Power Wide-Area Networks

讲 座 人：Ha H. Nguyen教授

讲座时间：2019年5月22日10:00-11:30

讲座地点：电航楼221会议室

讲座简介：

Low-power wide-area networks (LPWANs) have recently emerged as a promising communication technology for the Internet of Things (IoT). LPWANs are designed to achieve large coverage ranges, extend battery lifetimes of end-devices, and reduce the operational cost of traditional cellular networks. By exploiting the unlicensed, industrial, scientific, and medical (ISM) frequency band and transmitting small packets at low data rates, these networks can be operated with very low reception sensitivities. The long-range and low-power properties of LPWANs make these networks an interesting candidate for smart sensing technology in civil infrastructures as well as in industrial applications.

This talk first introduces the chirp spread spectrum (CSS) technique used in low-power wide-area networks known as LoRa. Then it presents novel approaches to modulate and demodulate LoRa signals with high implementation efficiency, flexibility and excellent performance. The last part of the talk explains a method to exploit the phase information of CSS signals to encode extra information bits, leading to throughput improvement of the conventional CSS system.

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                                                              信息科学技术学院

                                                                2019年5月20日

报告人简介：

Ha H. Nguyenreceived the B.Eng. degree from the Hanoi University of Technology (HUT), Hanoi, Vietnam, in 1995, the M.Eng. degree from the Asian Institute of Technology (AIT), Bangkok, Thailand, in 1997, and the Ph.D. degree from the University of Manitoba, Winnipeg, MB, Canada, in 2001, all in electrical engineering. He joined the Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada, in 2001, and became a full Professor in 2007. He currently holds the position ofNSERC/Cisco Industrial Research Chair in Low-Power Wireless Access for Sensor Networks. His research interests fall into broad areas of Communication Theory, Wireless Communications, and Statistical Signal Processing. Dr. Nguyen was an Associate Editor for the IEEE Transactions on Wireless Communications and IEEE Wireless Communications Letters during 2007-2011 and 2011-2016, respectively. He currently serves as an Associate Editor for theIEEE Transactions on Vehicular Technology.He was a Co-chair for the Multiple Antenna Systems and Space-Time Processing Track, IEEE Vehicular Technology Conferences (Fall 2010, Ottawa, ON, Canada and Fall 2012, Quebec, QC, Canada), Lead Co-chair for the Wireless Access Track, IEEE Vehicular Technology Conferences (Fall 2014, Vancouver, BC, Canada), Lead Co-chair for the Multiple Antenna Systems and Cooperative Communications Track, IEEE Vehicular Technology Conference (Fall 2016, Montreal, QC, Canada), and Technical Program Co-chair for Canadian Workshop on Information Theory (2015, St. John's, NL, Canada). He is a coauthor, with Ed Shwedyk, of the textbook "A First Course in Digital Communications" (published byCambridge University Press). Dr. Nguyen is aFellow of the Engineering Institute of Canada (EIC)and a Registered Member of the Association of Professional Engineers and Geoscientists of Saskatchewan (APEGS).