Yan Liu, QiSong Wu, GuangCai Sun, MengDao Xing, BaoChang Liu, Zheng Bao
Science China Information Sciences
SP Science China Press
In the synthetic aperture radar (SAR) system with low pulse repetition frequency (PRF) sampling, it is difficult for the motion parameters estimation of the moving targets, because of the Doppler spectrum ambiguity and Doppler centroid frequency ambiguity of the echo signals. Considering that moving targets are sparsely distributed in the observed scene, their positions and velocities can be reconstructed by using the compressed sensing (CS) technique. In this paper, the range-walk correction are implemented by the Keystone transform and the sparse range-walk correction (SRWC), then the CS technique is proposed to reconstruct motion parameters by processing the azimuth signals of the moving targets. Experiments using the simulated and real data are performed, and the results confirm the validity of the proposed method.
Y Liu, QS Wu, GC Sun, MD Xing, BC Liu, Z Bao - Science China Information Sciences, 2012