近场雷达三维成像技术综述

Overview of Near Field Radar 3D Imaging Technology

随着恐怖袭击事件的不断增加,雷达成像系统不仅限于成像,还拓展到了对一些隐匿危险目标的探测领域。目前国内已投入商业化应用的安检系统多数是二维成像模式。相对于三维成像,二维成像是有很多局限性的,如空间模糊和阴影效应等。近场雷达成像技术逐渐向三维成像发展,该技术可应用于安检、穿墙探测等多种情景。首先叙述了近场雷达三维成像系统的国内外研究现状,包括毫米波近场三维成像系统、太赫兹三维成像系统以及穿墙三维成像系统,然后叙述了近场雷达三维成像算法的国内外研究现状,包括近场时域三维成像算法和近场频域三维成像算法,并对近场雷达三维成像技术存在问题进行了总结与展望。

With the increase of terrorist attacks,radar imaging system is not only limited to imaging,but also extended to the detection of some hidden dangerous targets.At present,most of the security inspection systems which have been put into commercial application in China are two-dimensional imaging mode.Compared with three-dimensional imaging,two-dimensional imaging has many limitations,such as spatial blur and shadow effect.Therefore,in order to solve the limitations of two-dimensional imaging,near-field radar imaging technology gradually develops to three-dimensional imaging,which can be applied to security inspection,wall detection and other scenarios.This paper first summarized the research status of near-field radar 3D imaging system at home and abroad,including millimeter wave near-field 3D imaging system,terahertz 3D imaging system and through wall 3D imaging system,and then summarized the research status of near-field radar 3D imaging algorithm at home and abroad,including near-field time domain 3D imaging algorithm and near-field frequency domain 3D imaging algorithm.The existing problems of imaging technology were summarized and prospected.