一种SAR宽带噪声干扰抑制的新方法  

A New Approach of Wide Band Noise Interference Suppression for SAR

作　　者：阮航[1] 叶伟[1] 尹灿斌[1] 徐灿[1] 

机构地区：[1]装备指挥技术学院光电装备系,北京101416

出　　处：《现代防御技术》2010年第6期151-155,共5页Modern Defence Technology

摘　　要：提高合成孔径雷达(SAR)抗干扰性能是保证其在干扰条件下能正常工作的重要前提。针对SAR中宽带噪声干扰(WBNI),提出了一种在距离向基于回波数据去调频处理和特征子空间滤波的宽带噪声干扰抑制方法并进行了计算机仿真。仿真结果表明,在SAR距离向脉冲压缩增益大于接收端输入干信比5 dB时,该方法可以获得较理想的干扰抑制效果。而随着输入干信比的增加,干扰抑制性能将开始恶化。To enhance the anti-jamming capability of SAR is to ensure its imaging performance. A new approach based on dechirp-processing and eigen-subspaee filtering in range direction for wide band noise interference （WBNI） suppression is proposed here. Simulation results prove that this approach can suppress WBNI effectively if the jamming signal ratio （JSR） is 5 dB smaller than pulse compression gain in range direction. With the increase of the input JSR, the performance is degraded.

关 键 词：合成孔径雷达 宽带噪声干扰 去调频 特征子空间 干扰抑制 

分 类 号：TN958[电子电信—信号与信息处理] TN972[电子电信—信息与通信工程]