星载SAR弹射式干扰与抗干扰技术研究
发布时间：2018-09-06 15:27
【摘要】：现代战争越来越重视提升信息获取的能力,而SAR有着优秀的信息获取能力,星载SAR更是能在高空中实现大面积、高分辨率的军事侦察,在电子战中发挥着不可替代的作用。弹射式干扰模式凭借其成本低、实现简单、干扰样式多样和干扰效果良好等优点,逐渐成为今后电子战中一种重要的干扰手段,因此有必要对星载SAR弹射式干扰与抗干扰展开相关技术研究。本文首先简要介绍了SAR成像的原理,分析了弹射式干扰信号的传播路径,建立了星载SAR弹射式干扰的空间几何模型;通过对雷达目标回波与弹射式干扰信号成像机理的分析发现:被弹射式干扰后的成像结果是真实图像与虚假图像的叠加;虚假像是真实像的形变和位移;干扰机位置和转发延迟时间是影响弹射式干扰成像效果的两个重要参数;本文还针对干扰机的隐蔽性问题,提出了分布式弹射干扰模式,并分析了其空间几何模型和信号模型。其次,本文针对SAR成像RD算法,推导了弹射式干扰信号在距离压缩和方位压缩后的信号形式,从而得到了弹射式干扰虚假像在成像结果中的位置公式;并针对虚假像的位移特性,分析了虚假像与真实像图像分离条件和干扰机架设位置条件,利用仿真实验验证了不同干扰转发时延模式的弹射式干扰成像效果。本文还对分布式弹射干扰中的干扰机布局问题进行了研究,得出了干扰机最佳架设位置分布和多样式分布式弹射干扰模式。最后,基于弹射式干扰的成像机理,进行了信号域和图像域抗弹射式干扰技术研究。研究了双路对消信号域抗弹射式干扰方法,在图像域抗弹射式干扰方法研究方面,本文研究了图像域抗干扰的基本原理,干扰机位置参数对抗干扰成像效果的影响,研究了利用干扰虚假像的干扰机位置估计方法,在此基础上,提出了基于干扰信号重建的抗弹射式干扰方法,并对其误差影响和适用性条件进行了分析,仿真验证了该方法的正确性和有效性。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V443.2;TN957.52
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V443.2;TN957.52
【参考文献】
相关期刊论文 前10条
1 唐立科;李圣衍;;针对星载SAR的散射式干扰应用研究[J];航天电子对抗;2016年06期
2 徐锋;刘佳琪;刘洪艳;白锦良;江志烨;;机载合成孔径雷达散射波干扰研究[J];航天电子对抗;2016年02期
3 王振力;钟海;;国外先进星载SAR卫星的发展现状及应用[J];国防科技;2016年01期
4 谌诗娃;张剑云;贺平;周青松;;对空时自适应处理技术的散射波欺骗干扰研究[J];现代雷达;2016年01期
5 李浩;;合成孔径雷达散射波干扰研究[J];电子技术与软件工程;2015年09期
6 尹灿斌;尹东梅;秦卫东;贾鑫;;合成孔径雷达弹射式干扰增强方法[J];航天电子对抗;2013年05期
7 李田;彭世蕤;王广学;杨科锋;;机载SAR有源干扰分析与比较[J];雷达科学与技术;2013年05期
8 王迪;瞿福琪;焦均均;;SAR散射波干扰信号生成及干扰效果分析[J];航天电子对抗;2013年02期
9 王强;;对合成孔径雷达的弹射式干扰研究[J];电子科技;2013年04期
10 唐孝国;张剑云;王s，
本文编号：2226772
本文链接：https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2226772.html
