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中文摘要：
本文针对快速旋转目标的三维成像问题,首先,建立雷达目标成像的几何模型,推导了快速旋转目标的距离-慢时间域回波信号的解析表示;其次,提出了基于匹配滤波和复值反投影的三维成像算法。该算法首先构造距离-慢时间域匹配滤波器,对滤波器参数即旋转目标的半径方向取值进行搜索,综合各参数取值处的匹配滤波结果,通过设置阈值获得目标三维位置;同时,利用复值反投影方法消除散射点遮挡、散射系数变化及低信噪比复杂情况造成的失配影响,重建准确的目标三维像;最后,对复杂情况下的散射点目标成像进行了仿真并对比分析了匹配滤波和本文算法的成像结果,并利用圆顶锥模型的电磁计算数据进行成像,结果证明了本文算法的有效性。
英文摘要：
To resolve the problem of the 3-D imaging of rapidly spinning targets,firstly,this paper has constructed the radar imaging geometric model and acquired the echo analytical representation of the rapidly spinning target at range-slow-time domain;secondly, the MF-CVBP（matched filter and complex-valued back-projection）-based 3-D imaging algorithm is proposed.This algorithm constructs range-slow-time matched filter,by searching its parameter of radius direction of targets,the results of filter at each value of parameter are combined to acquire the 3-D target position;At the same time,the 3-D target image is reconstructed exactly after the influence of mismatch resulting from the complex case of shadowing and varying backscattering coefficients and low SNR is eliminated by the complex-value back projection;In the end,the radar imaging in the complex case is simulated and imaging results of the method of matched filter and MF-CVBP are analyzed,and the imaging result of the electromagnetic computation data of the domed-cone-model has proved the validity of the proposed algorithm in this paper.
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