混沌调频雷达成像与欺骗干扰分析  

Analysis of radar imaging and deception using chaotic FM signal

作　　者：郑远[1,2] 胡英辉[1,2] 邓云凯[1] 

机构地区：[1]中国科学院电子学研究所,北京100080 [2]中国科学院研究生院,北京100039

出　　处：《系统工程与电子技术》2009年第5期1071-1074,共4页Systems Engineering and Electronics

摘　　要：研究了混沌调频信号新的数学模型,并把该模型应用于成像雷达,对点目标像进行了仿真。与常规模型相比,该模型可以描述出合成孔径雷达的距离徙动现象,更适用于真实场景。信号的调制序列由r-Way Ber-noulli映射产生,对序列均匀抽取的方法可以使信号具有理想的相关性。还针对合成孔径雷达中的干扰问题,阐述了欺骗干扰的原理,并对线性调频和混沌调频信号的反干扰能力进行了分析与仿真。结果表明,混沌调频信号可以获得比较理想的点目标像,同时具有反欺骗干扰的能力。A new mathematical model of the chaotic frequency modulation （CFM） signal is studied. The model is applied to imaging radars, and point target imaging is simulated. Compared with the classical one, this model is much more suited in the actual instance, and the range migration can be described. Modulation series are derived from r-Way Bernoulli chaotic map, and an ideal auto-correlation signal could he achieved by using skipping techniques. To solve the jamming in SAR, the theory of the deception jamming is expatiated, and the capabilities of anti deceptive jamming of linear FM and CFM signals are also analyzed and simulated. The simulation results indicate that the ideal point target image can be achieved using CFM signals, and it has a property of anti deception jamming.

关 键 词：混沌调频信号 合成孔径雷达 欺骗干扰 

分 类 号：TN953[电子电信—信号与信息处理]