利用线性调频步进体制高分辨雷达对鸟类目标进行ISAR成像是解决航空安全保障中鸟情探测问题的一个全新且重要的技术途径。为了得到鸟类目标更清晰的像,准确判断其运动状态显得至关重要。基于线性调频步进体制雷达微多普勒效应的产生原理,在距离.慢时间谱图上,针对鸟类目标特性,通过对精高分辨距离像进行分析,提出了一种利用进退法搜索相邻精高分辨距离像的互相关系数的方法来判别鸟类目标运动状态。仿真结果证明了其可行性和有效性。
The birds can be imaged by ISAR with frequency-stepped chirp high-resolution radar for realizing bird detection to ensure aviation safety. For the sake of achieving a clearer image of birds, it is resolution range profiles with advance-retreat method in spectrogram, based on the principal of generating micro-Doppler effects with the frequency-stepped chirp radar and characteristics of birds. The feasibility and effectiveness of the method was proved by simulation results.