调频率正负交替变化的SAR成像及抗欺骗干扰方法  

Method for SAR imaging and anti-jamming by alternate frequency modulation

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,西安710129

出　　处：《计算机应用》2010年第5期1383-1385,1389,共4页journal of Computer Applications

摘　　要：为了提高合成孔径雷达(SAR)抗数字储频式欺骗干扰的性能,提出一种正负交替改变SAR调频率的方法,通过发射按正负交替序列规律改变SAR调频率的信号,使干扰信号在调频率上和原信号产生差异,经过匹配滤波后可以滤除干扰信号,进而抑制欺骗式干扰。仿真了在正负交替改变调频率情况下的成像及对抗欺骗式干扰的效果,仿真结果验证了这种方法的有效性。A method of alternating frequency modulation ratio was proposed to enhance the capabilities of suppressing Digital Radio Frequency Memory Cheat Jamming （DRFMCJ） for SAR.Thus,frequency modulation ratio of the transmit signals and the jamming signals differed.The jamming signal could be removed away through match filter,and cheat jamming could be restrained.The effects of the imaging and anti-jamming using alternate frequency modulation ratio were simulated.The simulation result shows that the method is effective.

关 键 词：合成孔径雷达 雷达成像 调频率 欺骗干扰 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]