SAR图像欺骗干扰方法研究

欺骗式干扰是一种对合成孔径雷达有效的干扰样式,如何利用现有资源准确、快捷地产生欺骗干扰信号是欺骗干扰的首要问题。在分析虚假目标与干扰机位置关系的基础上,推出将雷达干扰机接收到的信号进行一定量的延时,以及乘以额定附加相位产生对应位置的虚假目标信号的方法,此方法不仅原理简单,而且需要估计的参数少。为了防止欺骗生成的虚假图像被敌方发现,在分析辐射定标反欺骗式干扰技术的原理后,指出虚假干扰图像的选取原则,并且分析了参数估计对干扰效果的影响。最后利用试验仿真验证了干扰方法的可行性。

Methods of Deceptive Jamming to SAR Image

Deceptive jamming is an effective jamming style to Synthetic Aperture Radar (SAR).How to make use of the existing resources to produce deceptive jamming signal accurately and rapidly is an important problem to solve.Based on the analysis to the relationship between false target position and the jammer location,a method was proposed, which produced the false target signals of corresponding position by making a certain time-delay and multiplying a rated phase.The method was easily to carry out,and less parameters were need to be estimated. Based on the analysis to the principle of anti-deceptive jamming through radiometric calibration,the rule for choosing false images was pointed out.The influence of parameter estimation on interference effect was also analyzed.Finally the correction of the method is proved by the simulations.