对抗SAR-GMTI的方位向间歇采样延时转发干扰方法
发布时间：2018-12-25 20:07
【摘要】：针对常规SAR干扰方法对多通道SAR-GMTI干扰无效的问题,提出对抗SAR-GMTI的方位向间歇采样延时转发干扰方法,并针对中心假目标仍被完全抑制的问题对干扰方法进行多普勒移频改进。该方法利用方位向间歇采样实现多普勒频谱的周期性拓延,从而形成不能被SAR-GMTI对消的多个方位向假目标,并通过快/慢时间延时转发控制假目标的移位。理论分析和仿真实验表明:方位向间歇采样延时转发干扰可在多通道SAR-GMTI成像中形成二维灵活可控的方位向假目标串,同时假目标幅度受正弦调制函数的影响出现增强和削弱现象,多普勒移频改进可充分保留低阶假目标。
[Abstract]:In order to solve the problem that the conventional SAR jamming method is ineffective for multi-channel SAR-GMTI interference, a method to counter SAR-GMTI is proposed, which is based on azimuth intermittent sampling delay forwarding jamming. The Doppler frequency shift method is improved to solve the problem that the central false target is still completely suppressed. In this method, the periodic continuation of Doppler spectrum is realized by using the intermittent azimuth sampling, thus forming multiple azimuth false targets which can not be eliminated by SAR-GMTI, and the shift of false targets is controlled by fast / slow time delay forwarding. The theoretical analysis and simulation results show that the azimuth intermittent sampling delay forwarding interference can form two dimensional flexible and controllable azimuth false target string in multi-channel SAR-GMTI imaging. At the same time, the amplitude of false target is enhanced and weakened by the influence of sinusoidal modulation function, and the Doppler frequency shift can fully retain the low-order false target.
【作者单位】： 解放军电子工程学院;
【基金】：国家自然科学基金项目资助(61171170)
【分类号】：TN974
，
本文编号：2391577
[Abstract]:In order to solve the problem that the conventional SAR jamming method is ineffective for multi-channel SAR-GMTI interference, a method to counter SAR-GMTI is proposed, which is based on azimuth intermittent sampling delay forwarding jamming. The Doppler frequency shift method is improved to solve the problem that the central false target is still completely suppressed. In this method, the periodic continuation of Doppler spectrum is realized by using the intermittent azimuth sampling, thus forming multiple azimuth false targets which can not be eliminated by SAR-GMTI, and the shift of false targets is controlled by fast / slow time delay forwarding. The theoretical analysis and simulation results show that the azimuth intermittent sampling delay forwarding interference can form two dimensional flexible and controllable azimuth false target string in multi-channel SAR-GMTI imaging. At the same time, the amplitude of false target is enhanced and weakened by the influence of sinusoidal modulation function, and the Doppler frequency shift can fully retain the low-order false target.
【作者单位】： 解放军电子工程学院;
【基金】：国家自然科学基金项目资助(61171170)
【分类号】：TN974
，
本文编号：2391577
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