【百家大讲堂】第231期：运用探地雷达提取被掩埋物体的信号

讲座题目：运用探地雷达提取被掩埋物体的信号
报 告 人：Tapan K. Sarkar （教授，IEEE Fellow）
时 　 间：2019年8月12日(周一)9:00
地 　 点：中关村校区10号教学楼205
主办单位：研究生院、信息与电子学院

【主讲人简介】

　　Tapan K. Sarkar在1969年于印度理工学院获得学士学位，在1971年于加拿大新布伦瑞克大学获得硕士学位，并于1975年在美国雪城大学获得硕士及博士学位。Sarkar教授在1975-1976年在通用仪器公司TACO部门工作。1976-1985年，Sarkar教授在纽约罗彻斯特理工学院工作。1977-1978年，他担任哈佛大学戈登·麦凯实验室研究员。现任雪城大学电子与计算机工程教授。他的研究方向包括计算电磁学，自适应信号处理。Sarkar教授已发表超过400篇期刊论文，大量会议论文以及15本学术专著。

　　Sarkar教授是纽约注册专业工程师。他分别于1996和1998年在雪城大学获得了工程研究奖和Chancellor’s Citation。Sarkar教授是2014年IEEE 天线与传播技术学会主席，并且是2020年IEEE电磁学领域奖项获得人。

　　Sarkar教授分别于1998年、2004年和2012年获得法国布莱斯帕斯卡大学、西班牙马德里理工大学和芬兰阿尔托大学的名誉博士，2000年获得法国克莱蒙-费朗友好奖章。

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.

【讲座信息】

　　探地雷达是一种用于地下部署的无损技术。电磁波被传输到地面;目标对波进行反射，地面上的天线可以探测到反射波。目标的电气性能可以从接收机的响应中恢复。大多数探地雷达(GPRs)采用超宽带脉冲雷达技术。如果正确使用一幅地面快照或扫描图，就有可能在许多应用中简化GPR的使用。但这种技术需要运用波形信号处理，包括反褶积算法、噪声滤波和参数估计技术。本文对探地雷达系统进行了改进，通过使用两个发射器天线减小了地面弹跳和天线耦合的影响。这将充分降低天线的耦合效应，但地面反弹在一定程度上取决于地面的表面粗糙度。在这项研究中，假定地面为平面。本文也研究了地面介电常数对系统性能的影响。

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.