混沌信号在弹载雷达成像中的应用

传统的线性调频信号在雷达成像中存在旁瓣电平过高,参数容易被截获等缺点。为了提高成像雷达的抗干扰性能和分辨能力,将混沌调频信号用于弹载成像雷达系统,建立了SAR工作的空间几何模型,在此基础上分析了回波特性,并对点目标进行了成像仿真,重点对成像性能进行了分析。结果表明,混沌调频信号用于弹载成像雷达系统可获得比较理想的点目标图像,使系统具有强抗干扰性能,有着良好的发展前景。

Application of Chaos Signal to Missile-borne Radar Imaging

The classic LFM signal has high sidelobe level and its parameters can be easily intercepted in radar imaging.In this paper, chaotic FM signal is used to improve the capabilities of Electronic Counter-Counter Measure(ECCM) and resolution of missile-borne SAR.We established its geometry model, analyzed the return signal, simulated the point target imaging and analyzed the imaging characteristics of it.The simulation result demonstrated that ideal point target image can be achieved using chaotic FM signal, which has good prospects in radar imaging.