Two-Dimensional Precise Controllable Smart Jamming Against SAR via Phase Errors Modulation of Transmitted Signal
Zhenchang Liu, Dongyang Cheng, Ning Li, Lin Min, Zhengwei Guo
Abstract
Traditional jamming methods protect scene targets by generating barrage jamming or deceptive jamming effect, but the single jamming effect is currently difficult to meet the increasingly complex electromagnetic environment. To meet the complex electromagnetic environment, a 2-D precise controllable smart jamming method is proposed in this letter, which can produce two kinds of jamming effects: barrage jamming and deceptive jamming. Based on the synthetic aperture radar (SAR) imaging properties of linear frequency modulation (LFM), the range and azimuth modulation terms have been designed to generate precise controllable jamming. First, both the range and azimuth jamming positions can be controlled by first-order phase error modulation. Subsequently, multiple phases sectionalized modulation is performed in the range direction, quadratic phase error or periodic phase error modulation is performed in the azimuth direction. Different jamming effects can be generated by changing the jamming modulation item. Theoretical analysis and simulation results show that the proposed method can produce 2-D precise controllable smart jamming effects.