基于压缩感知信号重构的间歇采样转发干扰对抗方法  

ECCM scheme against interrupted-sampling repeater jamming based on compressed sensing signal reconstruction

作　　者：原慧[1] 王春阳[1] 安磊[2] 李欣[1] YUAN Hui;WANG Chunyang;AN Lei;LI Xin(Air and Missile Defence College, Air Force Engineering University, Xi’an 710051, China;Unit 94221 of the PLA, Rizhao 276824, China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051 [2]中国人民解放军94221部队,山东日照276824

出　　处：《系统工程与电子技术》2018年第4期717-725,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(61501500)资助课题

摘　　要：间歇采样转发干扰是一种针对大时宽带宽线性调频(linear frequency modulation,LFM)信号的新型相干干扰样式,通过不同的参数设置可以形成逼真多假目标以及具有压制效果的密集假目标干扰。根据间歇采样转发干扰"存储-转发-存储-转发"的干扰特点,给出了能量函数的定义,并根据目标回波信号和干扰信号能量函数的特征差异,提出了一种提取未受干扰影响的目标回波信号数据的方法;然后将其看作目标回波信号的压缩数据,利用其与解线调处理后的目标回波信号稀疏频域之间的线性关系,构建了压缩感知最小问题求解模型;最后,利用正交匹配追踪算法重构了目标回波信号,实现了对间歇采样转发干扰的抑制。蒙特卡罗仿真结果表明:通过设置合适的阈值,所提方法可以获得较好的干扰抑制性能和较高的抗干扰成功概率,并且不仅适用于中带LFM匹配滤波体制雷达,而且适应于宽带LFM去斜体制雷达。Interrupted-sampling repeater jamming(ISRJ)is a new kind of coherent jamming to the large time-bandwidth linear frequency modulation(LFM)signal.Many jamming modes,such as lifelike multiple-false targets and dense false targets,can be made by setting up different parameters.According to the characteristics of the ISRJ“storage-repeater-storage-repeater”,the energy function is defined and a method is proposed to extract the target echo data not disturbed by the jamming signal based on the difference between the target echo signal and jamming signal energy functions.Then,the extracted data is treated as the compressed data,which has linear relationship with the sparse frequency domain of the target echo signal,and a compressed sensing minimization model is established.Finally,the orthogonal matching pursuit algorithm is utilized to recover the target echo signal,which means the ISRJ is suppressed simultaneously.The Monte Carlo simulations show that good jamming suppression performance and high anti-jamming probability can be achieved under appropriate threshold,and what’s more,the proposed method is applicable to both medium-band LFM radar using the matched filtering and wide-band LFM radar using de-chirping.

关 键 词：间歇采样转发干扰 能量函数 压缩感知 电子反对抗 

分 类 号：TN974[电子电信—信号与信息处理]