虚假场景SAR欺骗式干扰技术及实时性分析

Deception-jamming technology against the SAR based on the deceptive scene and real-time analyses

考虑到敌方合成孔径雷达平台存在运动误差的情况,提出了一种虚假场景合成孔径雷达欺骗式干扰新的实时性方法.该方法通过快速算法首先对虚假场景图像进行图像预生成处理,然后把预生成的虚假图像和干扰机所接收到的合成孔径雷达信号进行卷积,并进行实时信号转发,这样可以有效地模拟合成孔径雷达平台与干扰机之间的瞬时斜距变化,使得虚假场景回波信号包含了合成孔径雷达平台的运动误差,进而使敌方雷达在通过运动补偿和合成孔径雷达成像处理后得到更为逼真的欺骗式虚假场景.在合成孔径雷达成像分析的基础上,提出一种分步处理的虚假场景信号的快速生成方法,保证了虚假场景生成的实时性.仿真和实测数据的处理结果证实了该欺骗式SAR干扰的有效性.

Considering the motion error of the enemy SAR, this paper proposes a novel realtime approach of deception-jamming. Via quick algorithm, this method pretreats the deception picture first, and then does the convolution operation with the received signal and transmits the signal. In this way, the distance between SAR platform and jamming equipment can be simulated effectively, and the echos contain the motion information. After motion compensation and SAR imaging operation, a more lifelike image can be obtained. This method proposes a quick algorithm of deceptive scene signal generation based on two-step processing, which ensures realtime generation of the signal. Simulation and experimental data have proved the validity of the approach.