【摘要】：針對常規(guī)SAR干擾方法對多通道SAR-GMTI干擾無效的問題,提出對抗SAR-GMTI的方位向間歇采樣延時轉(zhuǎn)發(fā)干擾方法,并針對中心假目標(biāo)仍被完全抑制的問題對干擾方法進(jìn)行多普勒移頻改進(jìn)。該方法利用方位向間歇采樣實現(xiàn)多普勒頻譜的周期性拓延,從而形成不能被SAR-GMTI對消的多個方位向假目標(biāo),并通過快/慢時間延時轉(zhuǎn)發(fā)控制假目標(biāo)的移位。理論分析和仿真實驗表明:方位向間歇采樣延時轉(zhuǎn)發(fā)干擾可在多通道SAR-GMTI成像中形成二維靈活可控的方位向假目標(biāo)串,同時假目標(biāo)幅度受正弦調(diào)制函數(shù)的影響出現(xiàn)增強和削弱現(xiàn)象,多普勒移頻改進(jìn)可充分保留低階假目標(biāo)。
[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.
【作者單位】： 解放軍電子工程學(xué)院;
【基金】：國家自然科學(xué)基金項目資助(61171170)
【分類號】：TN974
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本文編號：2391577