空间自旋目标宽带雷达干涉三维成像方法

发布时间：2018-07-24 18:00

【摘要】：空间目标三维成像可为目标的特征提取、分类与识别提供重要依据。基于L型三天线干涉成像原理,提出了一种宽带雷达条件下空间自旋目标干涉三维成像方法。首先,分析了雷达发射线性调频(LFM)信号条件下,空间自旋目标在距离-慢时间平面上的成像特点,建立了基于距离-慢时间平面的空间自旋目标干涉三维成像模型;其次,针对建立的干涉三维成像模型中,不同散射点的回波在距离-慢时间平面上会相互交叠的问题,对回波曲线分离、交叉点处理以及一维距离旁瓣的影响等进行了讨论,并给出了解决方法,从而获得目标三维图像。与已有方法相比,该方法可有效克服单基雷达三维成像无法获得目标各散射点真实三维位置以及在双/多基雷达三维成像时多部雷达回波联合处理较困难的问题。最后,仿真实验结果验证了所提方法的有效性。
[Abstract]:Three-dimensional imaging of space targets can provide important basis for feature extraction, classification and recognition. Based on the principle of L-type three-antenna interferometric imaging, a three-dimensional imaging method for spatial spin target interferometry in broadband radar is proposed. Firstly, the imaging characteristics of spatial spin target on range-slow time plane are analyzed under the condition of radar transmitting LFM (LFM) signal, and the three-dimensional imaging model of spatial spin target interferometry based on range-slow time plane is established. In order to solve the problem that the echoes of different scattering points overlap with each other in the range-slow time plane, the separation of echo curves, the processing of intersection points and the influence of one-dimensional distance sidelobes are discussed. The solution is given to obtain the three-dimensional image of the target. Compared with the existing methods, this method can effectively overcome the problem that the 3D imaging of single ground radar can not obtain the true 3D position of each scattering point of the target and the difficulty of joint processing of multi-radar echo in the 3D imaging of dual / multistatic radar. Finally, the simulation results show the effectiveness of the proposed method.
【作者单位】：空军工程大学信息与导航学院;信息感知技术协同创新中心;西安电子科技大学雷达信号处理重点实验室;
【基金】：国家自然科学基金(61571475,61471386) 中国博士后科学基金(2015M570815)~~
【分类号】：TN957.52

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