混沌信号在弹载雷达成像中的应用  

Application of Chaos Signal to Missile-borne Radar Imaging

作　　者：谭覃燕[1] 宋耀良[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《火力与指挥控制》2010年第1期54-57,共4页Fire Control & Command Control

基　　金：国防预研基金资助项目(9140A0120106BQ02)

摘　　要：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。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.

关 键 词：混沌信号 弹载SAR 雷达成像 

分 类 号：TN958[电子电信—信号与信息处理]