A Two-Step Ship Target Detection Method in High-Resolution Sar Image Based on Coarse-to-Fine Mechanism

2020 ◽  
Author(s):  
Kun Sun ◽  
Yuanyuan Li ◽  
Cong Li ◽  
Yi Liang ◽  
Mengdao Xing
Keyword(s):  
High Resolution ◽  
Target Detection ◽  
Detection Method ◽  
Sar Image ◽  
Coarse To Fine

Research of Beam Domain MVDR and Motion Compensation

2014 ◽  
Vol 686 ◽  
pp. 363-370
Author(s):  
Xiu Bo Luo ◽  
De Min Xu ◽  
Jun Jun Hu ◽  
Xiao Mei Hu
Keyword(s):  
High Resolution ◽  
Target Detection ◽  
Motion Compensation ◽  
Correlation Matrix ◽  
Detection Method ◽  
Minimum Variance ◽  
Moving Target ◽  
Detection Ability ◽  
Minimum Variance Distortionless Response ◽  
Motion Effect

Minimum variance distortionless response (MVDR) beamformer is a better target detection method, which provided high-resolution and anti-interference abilities. But the nice features will be degraded significantly for a fast bearing-rate target. Because the eigenvalue of longtime integral correlation matrix will spread, the signal and interference are no longer clearly identified by the eigenvectors. A beam domain MVDR and motion compensation arithmetic is given in this paper. The motion effect can be compensated by tracking the signal bearing change using real time estimated beam domain covariance matrix. The detection ability of moving target can be improved.

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