The Analysis of the Effect for a Micro-Motion Jamming to Multi-Aperture SAR/GMTI Base on Fractional Fourier Transform

LIU Yang; WANG Xue-song

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The Analysis of the Effect for a Micro-Motion Jamming to Multi-Aperture SAR/GMTI Base on Fractional Fourier Transform

更新时间：2025-07-16

- The Analysis of the Effect for a Micro-Motion Jamming to Multi-Aperture SAR/GMTI Base on Fractional Fourier Transform
- Acta Electronica Sinica Vol. 39, Issue 9, Pages: 2039-2045(2011)
- 作者机构：
  
  国防科技大学电子科学与工程学院,湖南,长沙,410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN958
- Published：2011
- 稿件说明：
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LIU Yang, WANG Xue-song. The Analysis of the Effect for a Micro-Motion Jamming to Multi-Aperture SAR/GMTI Base on Fractional Fourier Transform[J]. Acta Electronica Sinica, 2011, 39(9): 2039-2045.
DOI：

LIU Yang, WANG Xue-song. The Analysis of the Effect for a Micro-Motion Jamming to Multi-Aperture SAR/GMTI Base on Fractional Fourier Transform[J]. Acta Electronica Sinica, 2011, 39(9): 2039-2045. DOI：

摘要

微动特性干扰主要模拟了微动目标对合成孔径雷达图像的方位扩展影响

其成像特性已经得到了比较好的研究

但是对SAR/GMTI的影响研究还不充分.本文主要分析了基于分数阶傅里叶变换的多孔径SAR/GMTI的原理

根据分数阶傅里叶变换的本质和该方法下的杂波对消、干涉相位的响应特性

结合了微动干扰的多普勒特性

初步研究了在旋转角度匹配的条件下

微动干扰对SAR/GMTI的幅度和相位影响.文章利用计算机仿真结果验证了分析的正确性.结果表明:微动干扰也具备对SAR/GMTI的干扰能力

并结合分析结果指出了微动干扰的参数选择.

Abstract

In this paper

impacts on SAR/GMTI of the jamming which imitating micro-motion targets is developed focused on a Multi-Aperture SAR/GMTI system which based on Fractional Fourier Transform.Firstly the FrFT and the FrFT SAR/GMTI method were introduced.Secondly the response of the amplitude characteristic after clutter cancellation and interference phase were straightly reached

combined with analyzing the Doppler perspective of physical significance of the jamming

it easily got the jamming effects to SAR/GMTI.The expression of the amplitude and the phase were presented under the circumstance of matched rotating angle of FrFT.All the results were verified by computer simulations.It shows that the micro-motion jamming is efficiency in not only imaging but also GMTI.In the end

it gives some parameter choice advice for the jamming.

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