A novel concept for suppressing the problem of multipath ghosts in Ground Penetrating Radar (GPR) and Through-Wall Imaging (TWI) is presented. Ghosts (i.e., false targets) mainly arise from the use of the Born or single-scattering approximations that lead to linearized imaging algorithms; however, these approximations neglect the effect of multiple scattering (or multipath) between the electromagnetic wavefield and the object under investigation. In contrast to existing methods of suppressing multipath ghosts, the proposed method models for the first time the reflectivity of the probed objects as a probability function up to a normalized factor and introduces the concept of random subaperture by randomly picking up measurement locations from the entire aperture. Thus, the final radar image is a joint probability distribution that corresponds to radar images derived from multiple random subapertures. Finally, numerical experiments are used to demonstrate the performance of the proposed methodology in GPR and TWI imaging.
The National Natural Science Foundation of China (61471006)
通讯作者:
Li Lian-lin
E-mail: lianlin.li@pku.edu.cn
作者简介: Tan Yun-hua was born in 1973. He received his Ph.D. degree from Peking University. He is currently a lecturer with the School of Electronics Engineering and Computer Science, Peking University. His research interests are computational electromagnetics and radar imaging. E-mail: tanggeric@pku.edu.cn Wang Li-bo was born in 1990. He received his B.Eng. degree in physical electronics from the University of Electronic Science and Technology of China in 2013. He is currently working toward the M.S. degree in Peking University. His research interests are super-resolution electromagnetic imaging and new imaging methods. E-mail: 1301214165@pku.edu.cn Li Lian-lin was born in 1980. He received his Ph.D. degree from the Institute of Electronics, Chinese Academy of Sciences in 2006. He is currently a hundred talented program professor with Peking University. His research interests are super-resolution imaging, microwave imaging, sparse signal processing and ultrawideband radar systems.E-mail: lianlin.li@pku.edu.cn
引用本文:
谭云华, 王李波, 李廉林. 一种抑制探地/穿墙成像多径虚假目标的新型概率模型:数值研究(英文)[J]. 雷达学报, 2015, 4(5): 509-517.
Tan Yun-hua, Wang Li-bo, Li Lian-lin. A Novel Probability Model for Suppressing Multipath Ghosts in GPR and TWI Imaging: A Numerical Study. JOURNAL OF RADARS, 2015, 4(5): 509-517.
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2015, Vol. 4 
