【摘要】：現(xiàn)代戰(zhàn)爭越來越重視提升信息獲取的能力,而SAR有著優(yōu)秀的信息獲取能力,星載SAR更是能在高空中實現(xiàn)大面積、高分辨率的軍事偵察,在電子戰(zhàn)中發(fā)揮著不可替代的作用。彈射式干擾模式憑借其成本低、實現(xiàn)簡單、干擾樣式多樣和干擾效果良好等優(yōu)點,逐漸成為今后電子戰(zhàn)中一種重要的干擾手段,因此有必要對星載SAR彈射式干擾與抗干擾展開相關(guān)技術(shù)研究。本文首先簡要介紹了SAR成像的原理,分析了彈射式干擾信號的傳播路徑,建立了星載SAR彈射式干擾的空間幾何模型;通過對雷達(dá)目標(biāo)回波與彈射式干擾信號成像機(jī)理的分析發(fā)現(xiàn):被彈射式干擾后的成像結(jié)果是真實圖像與虛假圖像的疊加;虛假像是真實像的形變和位移;干擾機(jī)位置和轉(zhuǎn)發(fā)延遲時間是影響彈射式干擾成像效果的兩個重要參數(shù);本文還針對干擾機(jī)的隱蔽性問題,提出了分布式彈射干擾模式,并分析了其空間幾何模型和信號模型。其次,本文針對SAR成像RD算法,推導(dǎo)了彈射式干擾信號在距離壓縮和方位壓縮后的信號形式,從而得到了彈射式干擾虛假像在成像結(jié)果中的位置公式;并針對虛假像的位移特性,分析了虛假像與真實像圖像分離條件和干擾機(jī)架設(shè)位置條件,利用仿真實驗驗證了不同干擾轉(zhuǎn)發(fā)時延模式的彈射式干擾成像效果。本文還對分布式彈射干擾中的干擾機(jī)布局問題進(jìn)行了研究,得出了干擾機(jī)最佳架設(shè)位置分布和多樣式分布式彈射干擾模式。最后,基于彈射式干擾的成像機(jī)理,進(jìn)行了信號域和圖像域抗彈射式干擾技術(shù)研究。研究了雙路對消信號域抗彈射式干擾方法,在圖像域抗彈射式干擾方法研究方面,本文研究了圖像域抗干擾的基本原理,干擾機(jī)位置參數(shù)對抗干擾成像效果的影響,研究了利用干擾虛假像的干擾機(jī)位置估計方法,在此基礎(chǔ)上,提出了基于干擾信號重建的抗彈射式干擾方法,并對其誤差影響和適用性條件進(jìn)行了分析,仿真驗證了該方法的正確性和有效性。
[Abstract]:Modern warfare pays more and more attention to improving the ability of obtaining information, and SAR has excellent ability of obtaining information. Spaceborne SAR can realize large area and high resolution military reconnaissance in high altitude, and it plays an irreplaceable role in electronic warfare. With its advantages of low cost, simple implementation, various jamming styles and good jamming effect, ejection jamming mode has gradually become an important jamming method in future electronic warfare. Therefore, it is necessary to study the ejection jamming and anti-jamming technology of spaceborne SAR. In this paper, the principle of SAR imaging is briefly introduced, the propagation path of ejection jamming signal is analyzed, and the spatial geometric model of spaceborne SAR ejection jamming is established. By analyzing the imaging mechanism of radar target echo and ejection jamming signal, it is found that the imaging result after ejection jamming is the superposition of real image and false image, the deformation and displacement of false image. The location of jammers and the time of forwarding delay are two important parameters that affect the imaging effect of ejection jamming. In this paper, the distributed ejection jamming mode is proposed, and its spatial geometric model and signal model are analyzed in order to solve the hidden problem of jammers. Secondly, aiming at the SAR imaging RD algorithm, the paper deduces the form of the ejection jamming signal after the range compression and azimuth compression, and then obtains the position formula of the ejection jamming false image in the imaging result. According to the displacement characteristics of the false image, the separation condition of false image from the real image and the position condition of the jammer are analyzed, and the effect of ejection jamming imaging with different jamming and forwarding delay modes is verified by simulation experiments. In this paper, the problem of jammers layout in distributed ejection jamming is studied, and the optimal position distribution and multi-style distributed ejection jamming mode are obtained. Finally, based on the imaging mechanism of ejection jamming, the anti-ejection jamming technology in signal domain and image domain is studied. In this paper, the anti-ejection jamming method in dual-channel cancellation signal domain is studied. In the aspect of image domain anti-ejection jamming method, the basic principle of image domain anti-jamming is studied, and the influence of interference machine location parameters on anti-jamming imaging effect is studied. In this paper, the position estimation method of jamming machine using jamming false image is studied. Based on this, an anti-ejection jamming method based on jamming signal reconstruction is proposed, and its error influence and applicability condition are analyzed. Simulation results show that the method is correct and effective.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：V443.2;TN957.52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐立科;李圣衍;;針對星載SAR的散射式干擾應(yīng)用研究[J];航天電子對抗;2016年06期

2 徐鋒;劉佳琪;劉洪艷;白錦良;江志燁;;機(jī)載合成孔徑雷達(dá)散射波干擾研究[J];航天電子對抗;2016年02期

3 王振力;鐘海;;國外先進(jìn)星載SAR衛(wèi)星的發(fā)展現(xiàn)狀及應(yīng)用[J];國防科技;2016年01期

4 諶詩娃;張劍云;賀平;周青松;;對空時自適應(yīng)處理技術(shù)的散射波欺騙干擾研究[J];現(xiàn)代雷達(dá);2016年01期

5 李浩;;合成孔徑雷達(dá)散射波干擾研究[J];電子技術(shù)與軟件工程;2015年09期

6 尹燦斌;尹東梅;秦衛(wèi)東;賈鑫;;合成孔徑雷達(dá)彈射式干擾增強(qiáng)方法[J];航天電子對抗;2013年05期

7 李田;彭世蕤;王廣學(xué);楊科鋒;;機(jī)載SAR有源干擾分析與比較[J];雷達(dá)科學(xué)與技術(shù);2013年05期

8 王迪;瞿福琪;焦均均;;SAR散射波干擾信號生成及干擾效果分析[J];航天電子對抗;2013年02期

9 王強(qiáng);;對合成孔徑雷達(dá)的彈射式干擾研究[J];電子科技;2013年04期

10 唐孝國;張劍云;王s，

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