非匀速旋转目标和机动目标成像是逆合成孔径雷达(ISAR)技术的一个重点和难点，经典的距离-多普勒(RD)算法对其成像效果不佳。本文首先分析了ISAR成像回波信号模型，然后在对目标多普勒变化曲线作一阶近似的条件下提出了基于Radon—Ambiguity变换(RAT)的ISAR成像算法。最后进行仿真实验，仿真实验结果表明了该方法的有效性。

Inverse synthetic aperture radar (ISAR) imaging of nonuniformly rotating targets and maneuvering target are difficult but important in ISAR technique. The traditional Range-Doppler (RD) method hardly achieves good imaging results in this case. In this paper, we firstly analyze the radar echo signal model of ISAR. Then we present a new technique based on Radon-Ambiguity transform (RAT) for ISAR imaging upon the signal corresponding to each scatterer of the target is the linear frequency modulation (LFM) signal. Finally we use computer simulation to illustrate its performance and the simulation results show its effectivity.

TN958

国家“8 63计划”(No .2 0 0 2AA73 114 2 )资助课题