多通道SAR-GMTI二維間歇采樣延時轉(zhuǎn)發(fā)干擾
發(fā)布時間：2019-05-18 14:00
【摘要】：為充分降低合成孔徑雷達(dá)地面動目標(biāo)顯示(synthetic aperture radar-ground moving target indication,SAR-GMTI)對地面重要運(yùn)動目標(biāo)的威脅,本文在SAR間歇采樣轉(zhuǎn)發(fā)干擾技術(shù)基礎(chǔ)上,針對多通道SARGMTI提出了二維間歇采樣慢時間延時轉(zhuǎn)發(fā)干擾方法。該方法利用二維間歇采樣實現(xiàn)干擾信號的二維頻譜周期性拓展,從而生成無法被SAR-GMTI完全對消的假目標(biāo)群,并進(jìn)一步提出采用慢時間延時轉(zhuǎn)發(fā)來實現(xiàn)對假目標(biāo)群方位向位移的控制。在此基礎(chǔ)上,針對SAR-GMTI的對消特性給出了多組延時轉(zhuǎn)發(fā)干擾應(yīng)用模型。理論分析和仿真實驗表明:該方法可對多通道SAR-GMTI產(chǎn)生二維假目標(biāo)群,且假目標(biāo)幅度受正弦調(diào)制函數(shù)的影響出現(xiàn)增強(qiáng)和削弱,多組延時轉(zhuǎn)發(fā)干擾方法可以實現(xiàn)增強(qiáng)區(qū)與削弱區(qū)互補(bǔ),從而形成分布更密集、覆蓋范圍更廣的二維多假目標(biāo)干擾效果。
[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.
【作者單位】： 電子工程學(xué)院雷抗系;
【基金】：國家自然科學(xué)基金(61171170)資助課題
【分類號】：TN974
本文編號：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.
【作者單位】： 電子工程學(xué)院雷抗系;
【基金】：國家自然科學(xué)基金(61171170)資助課題
【分類號】：TN974
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