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PolSAR成像的固定极化干扰机有源诱饵目标鉴别及抑制
邵鹏
0
(中国西南电子技术研究所,成都 610036)
摘要:
针对合成孔径雷达(Synthetic Aperture Radar,SAR)成像中真假目标难以区分的问题,提出了一种极化合成孔径雷达(Polarmetric SAR,PolSAR)成像固定极化转发式干扰诱饵目标鉴别方法。该方法首先通过极化熵对目标进行分类,提取低极化熵的目标并对目标进行Wigner-Ville分布(Wigner-Ville Distribution,WVD)变换,再利用Hough变换计算WVD图像中的曲线斜率,将计算出的多普勒调频率与理论调频率进行对比,进而完成真实目标与假目标的鉴别,最终通过极化对消对鉴别出的目标进行抑制。实验结果验证了该方法的有效性。
关键词:  极化合成孔径雷达(PolSAR)  有源干扰  极化鉴别  目标分类  诱饵目标
DOI:
基金项目:
Polarization identification and suppression for fixed polarimetric jamming decoy target based on PolSAR imaging
SHAO Peng
(Southwest China Institute of Electronic Technology,Chengdu 610036,China)
Abstract:
For the problem that the true and false targets in synthetic aperture radar(SAR) imaging are indistinguishable,this paper proposes a method of fixed polarimetric interference decoy target identification based on polarimetric SAR(PolSAR) imaging.First,it classifies the target by polarization entropy.Second,targets with low polarization entropy are selected and Wigner-Ville distribution(WVD) transformation is performed on targets.Hough transform is used to calculate the slope of the curve in the WVD image.The slope of Doppler frequency is compared with the theoretical slope of Doppler frequency.Then,the identification of the real target and the false target is completed.Finally,the identified false target is suppressed by the polarization cancellation.Experiment proves the effectiveness of the proposed method.
Key words:  polarmetric synthetic aperture radar(PolSAR)  active jamming  polarization recognition  target classification  decoy target
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