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。
The multi-channel SAR image domain STAP methods, with a long coherent processing time, can achieve very high performance of clutter restrain and moving target detection. However, the array distortion and non-homogeneity environments have not been taken into consideration in the existing image domain STAP methods. 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 introduced method first applies the Power Selection and Training （PST） method to select the training data, and then proposes a new Improved Sample Matrix Inversion （ISMI） method to remove the moving targets in the training data. With 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 clutter data prove the validity of the introduced method.
出处
《遥感学报》
EI
CSCD
北大核心
2009年第2期238-245,共8页
NATIONAL REMOTE SENSING BULLETIN
基金
教育部新世纪优秀人才支持计划(编号:NCET-07-0223)
