基于混沌信号的SAR抗距离向相干干扰方法  

A Method of Anti - jamming in Range Direction Based on Chaotic Signal

作　　者：谢春健[1] 郭陈江[1] 许家栋[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129

出　　处：《计算机仿真》2010年第11期132-135,共4页Computer Simulation

基　　金：西北工业大学基础研究基金(JC200939)

摘　　要：研究优化SAR抗干扰技术,针对干扰的欺骗性和复杂性,为了进一步提高SAR的抗欺骗干扰能力,应采用复杂发射波形抑制的关键技术,提出了一种改进型Logistic映射产生混沌序列,使序列对信号进行相位调制,得到混沌调制SAR信号的方法,根据信号的自相关和互相关特性,可将信号作为SAR发射信号,然后对回波进行匹配滤波和成像。由于干扰信号和发射信号的相关性降低,干扰信号无法获得距离向压缩增益,从而抑制了欺骗干扰,获得了比采用传统LFM调制的波形信号更强的抗干扰能力。仿真实验证明了方法的有效性。Using complex waveforms is one of the key elements to enhance the anti-jamming capability for SAR of the current study.Pulse compression radar signal that uses chaotic phase modulation signal is discussed.The chaotic phase modulation signal can be as a transmission signal,and then matched filtering and imaging of the echo signal are carried out.As the jamming signal has low correlation with the transmission signal,it can not obtain the range compress gain,and thus is suppressed,so the signal has stronger anti-jamming capability than traditional LFM signal.The simulation results show that this approach is effective.

关 键 词：合成孔径雷达 抗干扰 混沌调相信号 线性调频信号 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]