针对常规合成孔径雷达地面动目标显示(SAR-GMTI)干扰方法产生的假目标易被识别的问题,提出基于方位/距离延迟的二维时序的干扰信号产生方法。首先,基于合成孔径雷达成像规律在慢时间域进行精确延时控制,实现虚假动目标的方位向空间分布的精确设置;然后,根据预设假目标和干扰机在距离向的距离进行快时间域的延迟控制。理论分析和仿真实验表明:文中提出的干扰产生时序方法能够在多通道SAR-GMTI检测中形成灵活可控的二维位置控制,提高了假目标的逼真度。

Aiming at the problem that the false moving target generated by the traditional synthetic aperture radar-ground moving target (SAR-GMTI) jamming signal generation method is easy to be identified, a new way to control the false moving target’s displacement by two dimensions time-delay is proposed. First, based on image processing of synthetic aperture radar imaging system, the slow-time delay is produced elaborately to locate the false moving target exactly in the azimuth dimension. Then, the fast-time delay is produced according to the pre-set distance between the false moving target and the jammer in the range dimension. Theoretical analysis and simulation experiments show that the proposed method can control the location of the false target well in multichannel SAR-GMTI detection and so that the false target is hard to be distinguished.

TN972