基于物理光学法的近场多入多出雷达成像模拟  

Near-field MIMO radar imaging simulation based on physical optics method

作　　者：经文 赵宇姣 江舸[1] 刘杰[2] 成彬彬[2] 张健[1,2] ZHAO Yujiaob;JING Wen;ZHAO Yujiao;JIANG Ge;LIU Jie;CHENG Binbin;ZHANG Jian(Institute of Electronic EngineeringChina Academy of Engineering Physics,Mianyang Sichuan 621999,China;Microsystem&Terahertz Research Center,China Academy of Engineering Physics,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999 [2]中国工程物理研究院微系统与太赫兹研究中心,四川绵阳621999

出　　处：《太赫兹科学与电子信息学报》2019年第6期981-987,共7页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61601424)

摘　　要：针对点目标扩展函数(PSF)不能有效分析复杂目标在毫米波近场多入多出(MIMO)雷达成像中的散射机理问题,研究了一种基于近场物理光学散射计算数据的毫米波MIMO雷达成像模拟方法。该方法利用近场物理光学方法,获得包含阵列构型和目标散射信息的近场计算数据,并通过近场MIMO成像处理器实现近场MIMO成像的全过程模拟。利用D波段"T"字型二维稀疏MIMO阵对复杂的三维目标开展了近场成像实验,仿真和实验结果表明,模拟结果与实际成像结果有很好的一致性。该方法能够分析近场MIMO成像系统的成像性能,为近场MIMO成像的阵型设计提供支撑,揭示复杂目标的近场散射特性与成像机理。In view of the Point Spread Function(PSF)for near-field Multiple-Input Multiple-Output(MIMO)radar imaging cannot analyze the scattering mechanism of complex targets effectively,a simulation method of millimeter wave near-field MIMO radar imaging based on near-field Physical Optical(PO)scattering data is studied.The method uses near-field physical optics method to compute the near-field scattering field including the information of array configuration and scattering mechanism.Near-field MIMO image is finally generated by imaging processor.Using the D-band"T"-shaped twodimensional sparse MIMO arrays to carry out the near-field imaging experiment,the simulation results are in good agreement with the actual imaging results.This method can analyze the imaging performance of the near-field MIMO imaging system,support the formation design,and reveal the near-field scattering characteristics and imaging mechanism of complex targets.

关 键 词：近场MIMO成像 成像模拟 物理光学 

分 类 号：TN955[电子电信—信号与信息处理]