侦察参数精度对机载SAR假目标干扰的影响

针对实施机载合成孔径雷达(SAR)假目标欺骗干扰所需引导参数存在测量误差的问题，首先，分析了假目标欺骗干扰调制信号模型，并给出了干扰信号所需侦察参数；然后，分析了机载平台与信号参数误差对假目标的位置、幅度及分辨率的影响,指出了假目标在SAR图像中的“折叠”现象，并分析了产生原因；最后，对参数误差的影响进行了定量仿真分析。理论分析与仿真结果表明，SAR的定位误差与假目标的成像位置偏移量大致呈线性关系。当速度误差为2%、方位向定位误差为100 m时，假目标的方位向分辨率降低约1倍。

Effects of reconnaissance parameter accuracy on airborne SAR false target deceptive jamming

In order to analyze the effect of parameter estimation error for booting the jammer to generate deceptive jamming signal,a false target deceptive jamming signal generation model for countering airborne Synthetic Aperture Radar(SAR) is proposed in this paper. The effects of parameter errors on the imaging position,amplitude and resolution of false target in airborne SAR image are analyzed,and the position fold phenomenon is also analyzed when the parameters estimation accuracy is low. The effects of single parameter error and all parameter errors are simulated. Theoretical analysis and simulation results indicate that position estimation errors have a linear relationship with the imaging position offset of the false target. If the velocity error is 2%, and the position error of azimuth is 100 m, the resolution in azimuth will approximately double.