基于目标宽度特征的脉间跳频雷达距离精确成像

High Precision Range Imaging of Pulse Stepped Frequency Radar Based on Target's Feature

根据雷达目标的宽度特征 ,提出了目标检测窗口内雷达信号的逆Chirp z变换局部成像处理方法 .利用有限的输入数据长度 ,有效提高目标局部距离像的采样分辨率 ,获得更精确的距离像 .与传统的数据长度补零逆傅里叶变换方法相比 ,在相同的采样分辨率条件下 ,该方法能有效减小计算量 .仿真实验结果与理论分析相符合 ,证明了该方法的有效性 .

According to radar target's width feature, an inverse Chirp-z transformation method was put forward for the target's detection window. It aimed to obtain high precision range image via increasing sampling resolution. Compared with traditional inverse Fourier transform method, which used zeros padding method, at the same condition of sampling resolution, the method proposed could decrease the calculation load. Simulation corresponded with theoretical analysis,and the results proved it was effective.