基于微动调制的 InSAR 有源干扰方法

摘要

鉴于微动调制能够有效地对合成孔径雷达（synthetic aperture radar，SAR）进行干扰，研究基于微动调制干涉合成孔径雷达（interferometric synthetic aperture radar，InSAR）有源干扰方法。基于 InSAR 信号模型研究了微动调制干扰对 InSAR 的干扰原理，进一步分析了干扰效果与关键干扰参数之间的关系，并利用仿真进行了验证。研究表明，该干扰方法能够在 InSAR 图像中形成沿方位向分布的形似“连续的栅栏”或“离散的栅栏”的多假目标，“栅栏”的间隔和长度由微动调制参数决定，“栅栏”的高度由干扰机的高度和发射功率共同决定。%Based on the fact that micro motion modulation can disturb synthetic aperture radar (SAR)effectively, an active jamming method for interferometric synthetic aperture radar (InSAR)is studied.Based on the signal models of InSAR signal processing,principles of the jamming are derived.Then,the relationship between key jamming pa-rameters and the effect is analyzed.Furthermore,the conclusion is verified via simultion.The result shows that the jamming method can produce multiple false targets along the azimuth direction in InSAR imagry,which appear as “con-tinuous barriers”or “discrete barriers”.The interval and length of the “barriers”rely on the paremeters of micro mo-tion modulation,and the height of the “barriers”depends on the height of the jammer and the jamming power.