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Propagation Prediction Based on Physical Optics
时间:2018-08-13 22:45    点击:   所属单位:物理与光电工程学院
讲座名称 Propagation Prediction Based on Physical Optics
讲座时间 2018-08-15 16:05:00
讲座地点 北校区图书馆西裙楼三楼报告厅
讲座人 Prof. Qingsheng Zeng
讲座人介绍

Qingsheng Zeng (S'97--M'02--SM'11) received his Ph.D. from University of Ottawa, Canada, and is currently a distinguished professor and PhD advisor of Nanjing University of Aeronautics and Astronautics (NUAA), an adjunct professor and PhD advisor of University of Ottawa, Carleton University, Université du Québec an Outaouais (UQO), and Institut National de la Recherche Scientifique -- Centre Energie, Matériaux et Télécommunications (INRS-EMT), a guest professor of Harbin Engineering University (HEU), Northwestern Polytechnic University (NWPU), Beijing University of Post and Telecommunications (BUPT) and Beijing Jiaotong University (BJTU). He has been a research engineer and a senior research engineer at Communications Research Centre Canada (CRC), Government of Canada. Dr. Zeng has undertaken research and teaching in several fields, including antenna analysis and design, electromagnetic compatibility and interference (EMC/EMI), ultra wideband technology, radio wave propagation, computational electromagnetics. He is the Chair of AP (Antennas and Propagation) / MTT (Microwave Theory and Techniques) Joint Chapter and Secretary of EMC (Electromagnetic Compatibility) Chapter of IEEE Ottawa, a Member of IEEE Canada Industry Relations Committee, and a senior member of IEEE. Dr. Zeng has been a member of the Strategic Projects Grant (SPG) Selection Panel (Information and Communications Technologies B) for the Natural Sciences and Engineering Research Council of Canada (NSERC), a member of Site Visit Committee of NSERC Industrial Research Chair (IRC), and a reviewer of NSERC Industrial R&D Fellowships.

He has published more than 100 SCI and EI indexed papers and technical reports, authored one book and co-authored two book chapters, one of which has been downloaded more than 3000 times only in one year after it was published in 2011. His work on the project “Aggregate Interference Analysis and Suitability of Some Propagation Models to Ultra-wideband Emissions in Outdoor Environments” has formed one part of Consultation Paper on the Introduction of Wireless Systems Using Ultra Wideband Technology, Spectrum Management and Telecommunications Policy, Industry Canada, and has been taken as a significant contribution to International Telecommunication Union (ITU). Dr. Zeng has been serving as an editorial board member and a reviewer for a number of technical books and scientific journals, as a conference co-chair, a session chair and organizer, a technical program committee co-chair and member and a reviewer, a short course/workshop/tutorial presenter and a keynote speaker for many international and national symposia. He has won several technical and technical service awards, was ranked as one of the researchers at Communications Research Centre Canada with the strongest impacts in 2011, and selected as a distinguished expert under the Plan of Hundreds of Talents of Shanxi Province in China during 2015 and an oversea prestigious advisor of Guangdong Province in 2017.

讲座内容

Physical optics (PO) or Fresnel-Kirchhoff theory forms the base to solve the problem of diffraction over terrain or buildings, particularly when the terrain or buildings can be modeled as knife edges. Because the numerical integration required to solve the realistic problems is very time-consuming, physical optics is not commonly used in the original formulations for developing the related software products. In order to increase the computational efficiency, a number of assumptions and simplifications have been made. In this presentation, Fresnel-Kirchhoff theory is briefly reviewed, the assumptions and simplifications made for improving the computational efficiency is explained and clarified, the software performance is analyzed through the comparison between prediction and measurement, the inherent drawbacks of the software and its limitations in application are discussed, and possible improvement of the prediction algorithm and procedure is proposed.

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