講座題目：運用探地雷達提取被掩埋物體的信號
報 告 人：Tapan K. Sarkar （教授，IEEE Fellow）
時 　 間：2019年8月12日(周一)9:00
地 　 點：中關村校區10號教學樓205
主辦單位：研究生院、信息與電子學院

【主講人簡介】

　　Tapan K. Sarkar在1969年于印度理工學院獲得學士學位，在1971年于加拿大新布倫瑞克大學獲得碩士學位，并于1975年在美國雪城大學獲得碩士及博士學位。Sarkar教授在1975-1976年在通用儀器公司TACO部門工作。1976-1985年，Sarkar教授在紐約羅徹斯特理工學院工作。1977-1978年，他擔任哈佛大學戈登·麥凱實驗室研究員。現任雪城大學電子與計算機工程教授。他的研究方向包括計算電磁學，自適應信號處理。Sarkar教授已發表超過400篇期刊論文，大量會議論文以及15本學術專著。

　　Sarkar教授是紐約注冊專業工程師。他分別于1996和1998年在雪城大學獲得了工程研究獎和Chancellor’s Citation。Sarkar教授是2014年IEEE 天線與傳播技術學會主席，并且是2020年IEEE電磁學領域獎項獲得人。

　　Sarkar教授分別于1998年、2004年和2012年獲得法國布萊斯帕斯卡大學、西班牙馬德里理工大學和芬蘭阿爾托大學的名譽博士，2000年獲得法國克萊蒙-費朗友好獎章。

Tapan K. Sarkar received the B.Tech. degree from the Indian Institute of Technology, Kharagpur, in 1969, the M.Sc.E. degree from the University of New Brunswick, Fredericton, NB, Canada, in 1971, and the M.S. and Ph.D. degrees from Syracuse University, Syracuse, NY, in 1975. From 1975 to 1976, he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology, Rochester, NY, from 1976 to 1985. He was a Research Fellow at the Gordon McKay Laboratory, Harvard University, Cambridge, MA, from 1977 to 1978. He is a Professor in the Department of Electrical and Computer Engineering, Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He has authored or coauthored more than 400 journal articles and numerous conference papers and 32 chapters in books and fifteen books.

Dr. Sarkar is a Registered Professional Engineer in the State of New York. He received the College of Engineering Research Award in 1996 and the Chancellor’s Citation for Excellence in Research in 1998 at Syracuse University. He was the 2014 President of the IEEE Antennas and Propagation Society. He is the receipient of the 2020 IEEE Electromagnetics Field Award.

He received Docteur Honoris Causa from Universite Blaise Pascal, Clermont Ferrand, France in 1998, from Politechnic University of Madrid, Madrid, Spain in 2004, and from Aalto University, Helsinki, Finland in 2012. He received the medal of the friend of the city of Clermont Ferrand, France, in 2000.

【講座信息】

　　探地雷達是一種用于地下部署的無損技術。電磁波被傳輸到地面;目標對波進行反射，地面上的天線可以探測到反射波。目標的電氣性能可以從接收機的響應中恢復。大多數探地雷達(GPRs)采用超寬帶脈沖雷達技術。如果正確使用一幅地面快照或掃描圖，就有可能在許多應用中簡化GPR的使用。但這種技術需要運用波形信號處理，包括反褶積算法、噪聲濾波和參數估計技術。本文對探地雷達系統進行了改進，通過使用兩個發射器天線減小了地面彈跳和天線耦合的影響。這將充分降低天線的耦合效應，但地面反彈在一定程度上取決于地面的表面粗糙度。在這項研究中，假定地面為平面。本文也研究了地面介電常數對系統性能的影響。

One of the established non-destructive techniques for subsurface deployment is through the use of ground penetrating radar. An electromagnetic wave is transmitted into the ground; the target reflects the wave and the reflections can be detected by an antenna placed above the ground. The electrical properties of the target can be recovered from the receiver response. Most ground-penetrating radars (GPRs) employ the ultra-wideband impulse radar technology. A single snapshot of the ground or an A-scan if properly used has the potential of simplifying the use of GPR in many applications. But this would require the use of waveform signal processing, which would include deconvolution algorithms, noise filtering and parameter estimation techniques. In this paper the ground penetrating system is modified such that the effect of the ground bounce and the antenna coupling is minimized. This is done through the use of two transmitter antennas instead of one. The will totally reduce the antenna coupling effects, but the ground bounce is to some extent dependent of the surface roughness of the ground. In this research the ground has been assumed to have a planar surface. The effect of the dielectric constant of the ground on the system is also studied.