SAR多普勒移频间歇采样转发干扰方法

针对波形捷变合成孔径雷达(synthetic aperture radar,SAR)提出一种新的干扰方法:多普勒移频间歇采样转发干扰。首先依据调频斜率捷变SAR信号方位向时延和多普勒移频的耦合特性,提出SAR多普勒移频干扰方法,在此基础上,为产生方位向位置精确可控的多假目标,结合方位向间歇采样转发干扰技术,研究了SAR多普勒移频间歇采样转发干扰机理,并对干扰效果及影响因素进行了详细分析。为同时形成距离向超前和滞后的假目标,建立了干扰应用模型,给出了各阶假目标能量补偿系数及多组假目标产生方法,可同时满足重点目标和重要区域的防护需求。理论分析和仿真实验证明了干扰方法的可行性、有效性。

Doppler shift-frequency intermittent sampling repeater jamming for SAR

A new jamming method for waveform agile synthetic aperture radar(SAR) is proposed—Doppler shift frequency intermittent sampling repeater jamming. Firstly, by utilizing the coupling relationship between the azimuth time delay and Doppler shift frequency of frequency modulation slope jittered SAR, the Doppler shift frequency jamming method is proposed. Then, in order to produce multiple false targets with the accurate azimuth location, combined with the azimuth intermittent sampling repeater jamming, the mechanism of Doppler shift frequency intermittent sampling repeater jamming is researched, and the jamming effect and influencing factors are analyzed in detail. Finally, in order to produce fronted and lagged false targets at the same time, the jamming application model is established, and the energy compensation coefficient of each false target and the method of producing multiple sets of false targets are brought forward. The jamming application model can meet the needs of protecting key targets and important areas. Theoretical analysis and computer simulation justify the validity and efficiency.