| 可适应阵列误差和非均匀杂波环境的多通道SAR图像域STAP方法 |
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| 引用本文： | 常玉林,黄晓涛,周红,周智敏.可适应阵列误差和非均匀杂波环境的多通道SAR图像域STAP方法[J].遥感学报,2009,13(2):238-245. |
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| 作者姓名： | 常玉林 黄晓涛 周红 周智敏 |
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| 作者单位： | 国防科学技术大学,电子科学与工程学院,湖南,长沙,410073 |
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| 基金项目： | 教育部新世纪优秀人才支持计划 |
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| 摘 要： | 多通道SAR图像域STAP方法是一种利用了长相干积累时间的STAP方法,其杂波抑制和运动目标检测能力强.但是,目前的多通道SAR图像域STAP方法均是在理想条件下给出的,没有考虑阵列误差和非均匀杂波环境对其性能的影响.文中分析了阵列误差和非均匀杂波环境的影响,提出了一种可适应阵列误差和非均匀杂波环境的多通道SAR图像域STAP方法.基于实测杂波数据的实验验证了所提方法的正确性.
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| 关 键 词： | 图像域STAP方法 阵列误差 非均匀杂波环境 |
A new image domain STAP method for multi-channel SAR with array distortion and non-homogeneity environments |
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| CHANG Yu-lin,HUANG Xiao-tao,ZHOU Hong and ZHOU Zhi-min.A new image domain STAP method for multi-channel SAR with array distortion and non-homogeneity environments[J].Journal of Remote Sensing,2009,13(2):238-245. |
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| Authors: | CHANG Yu-lin HUANG Xiao-tao ZHOU Hong and ZHOU Zhi-min |
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| Abstract: | Themulti-channel SAR image domain STAP methods, with a long coherent processing time, can achieve very high
performance of clutter restrain andmoving targetdetection. However, the array distortion and non-homogeneity environments have
notbeen taken into consideration in the existing image domain STAPmethods. This paper studies their influence on the performance
of the image domain STAP, and then proposes a new multi-channel SAR image domain STAP method that can cope with array
distortion and non-homogeneity environments. The introducedmethod firstapplies the PowerSelection and Training (PST) method
to select the training data, and then proposes anew Improved SampleMatrix Inversion (ISMI) method to remove themoving targets
in the training data. W ith the training data eliminating the moving targets, the covariance matrix of the clutter is estimated.
Afterwards the array distortion is estimated based on the covariance matrix, and the array distortion is calibrated later during the
image domain STAP processing. The experiments based on real clutterdata prove the validity of the introducedmethod. |
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| Keywords: | STAP |
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