多通道SAR-GMTI二维间歇采样延时转发干扰
发布时间：2019-05-18 14:00
【摘要】：为充分降低合成孔径雷达地面动目标显示(synthetic aperture radar-ground moving target indication,SAR-GMTI)对地面重要运动目标的威胁,本文在SAR间歇采样转发干扰技术基础上,针对多通道SARGMTI提出了二维间歇采样慢时间延时转发干扰方法。该方法利用二维间歇采样实现干扰信号的二维频谱周期性拓展,从而生成无法被SAR-GMTI完全对消的假目标群,并进一步提出采用慢时间延时转发来实现对假目标群方位向位移的控制。在此基础上,针对SAR-GMTI的对消特性给出了多组延时转发干扰应用模型。理论分析和仿真实验表明:该方法可对多通道SAR-GMTI产生二维假目标群,且假目标幅度受正弦调制函数的影响出现增强和削弱,多组延时转发干扰方法可以实现增强区与削弱区互补,从而形成分布更密集、覆盖范围更广的二维多假目标干扰效果。
[Abstract]:In order to fully reduce the threat of synthetic aperture radar ground moving target display (synthetic aperture radar-ground moving target indication,SAR-GMTI) to important moving targets on the ground, this paper is based on SAR intermittent sampling and forwarding interference technology. A two-dimensional intermittent sampling slow time delay forwarding interference method is proposed for multi-channel SARGMTI. In this method, two-dimensional intermittent sampling is used to expand the two-dimensional spectrum of interference signal periodically, so as to generate false target group which can not be completely eliminated by SAR-GMTI. Furthermore, slow time delay forwarding is proposed to control the azimuth displacement of false target groups. On this basis, a multi-group application model of delay forwarding interference is proposed according to the cancellation characteristics of SAR-GMTI. Theoretical analysis and simulation results show that this method can generate two-dimensional false target group for multi-channel SAR-GMTI, and the amplitude of false target is enhanced and weakened by sinusoidal modulation function. The multi-group delay forwarding interference method can complement the enhanced area and the weakened region, thus forming a more dense distribution and wider coverage of two-dimensional multi-false target interference effect.
【作者单位】： 电子工程学院雷抗系;
【基金】：国家自然科学基金(61171170)资助课题
【分类号】：TN974
本文编号：2480066
[Abstract]:In order to fully reduce the threat of synthetic aperture radar ground moving target display (synthetic aperture radar-ground moving target indication,SAR-GMTI) to important moving targets on the ground, this paper is based on SAR intermittent sampling and forwarding interference technology. A two-dimensional intermittent sampling slow time delay forwarding interference method is proposed for multi-channel SARGMTI. In this method, two-dimensional intermittent sampling is used to expand the two-dimensional spectrum of interference signal periodically, so as to generate false target group which can not be completely eliminated by SAR-GMTI. Furthermore, slow time delay forwarding is proposed to control the azimuth displacement of false target groups. On this basis, a multi-group application model of delay forwarding interference is proposed according to the cancellation characteristics of SAR-GMTI. Theoretical analysis and simulation results show that this method can generate two-dimensional false target group for multi-channel SAR-GMTI, and the amplitude of false target is enhanced and weakened by sinusoidal modulation function. The multi-group delay forwarding interference method can complement the enhanced area and the weakened region, thus forming a more dense distribution and wider coverage of two-dimensional multi-false target interference effect.
【作者单位】： 电子工程学院雷抗系;
【基金】：国家自然科学基金(61171170)资助课题
【分类号】：TN974
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