基于互谱测度法的多通道SAR散射波干扰抑制研究  

Scattering Interference Mitigation Using Cross Spectral Metric for Multi-channel SAR

作　　者：孙建涛[1,2] 张平[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《电子与信息学报》2010年第10期2371-2376,共6页Journal of Electronics & Information Technology

摘　　要：散射波干扰极大地破坏了合成孔径雷达(Synthetic Aperture Radar,SAR)对地物目标的识别,利用快时间STAP(Space Fast-time Adaptive Processing)可以对散射波干扰进行有效抑制。该文针对多通道SAR,讨论了互谱测度法在散射波干扰抑制中的应用,分析了干扰加噪声协方差矩阵的互谱,仿真讨论了互谱测度法求解的加权矢量对散射波干扰抑制性能的影响,并和基于主分量分析的散射波干扰抑制算法性能进行了比较。仿真结果表明在同样的自由度下,互谱测度法较主分量分析法可以取得较优的散射波干扰抑制性能。Scattering interference will result in large regions being blurred while forming a SAR image,and Space Fast-time Adaptive Processing（Fast time STAP） can be utilized to mitigate its influence.A scattering interference mitigation method based on Cross Spectral Metric（CSM） for Multi-channel SAR（MSAR） is presented in this paper,and the cross spectrum of the interference plus noise covariance matrix is analyzed.Also,the interference mitigation performance of the new method is analyzed,and is compared with the performance of the method based on Principal Component Analysis（PCA）.The simulation results demonstrate that CSM performs better than PCA in scattering interference mitigation.

关 键 词：多通道合成孔径雷达 散射波干扰抑制 快时间STAP 互谱测度法 

分 类 号：TN974[电子电信—信号与信息处理]