Doppler Ambiguity Resolving for SAR Ground Fast Moving Target Indication
This paper investigates the restrictions of SynthetiC aperture Radar (SAR) ground fast moving target indication based on the conventional clutter suppression method in image domain which ignores the problems of range cell migration (RCM) and azimuth defocus. A technique for fast moving target indication and motion parameter estimation is proposed based on Doppler ambiguity resolving.In range frequency and compressed azimuth time domain of tri-channel sAR/GMTI data,the clutter is suppressed with DPCA technique,and the Doppler ambiguity number can be estimated from the residual signal using Radon transform. This approach exploits the relation between the line slope and the Doppler ambiguity number of fast moving target. Azimuth focusing is carried out with the criterion of entropy-minimization after azimuth cell migration correction (ACMC),and at last the fast moving target is imaged after range compression. The feasibility of the approach is validated by the real airborne data.
Synthetic Aperture Radar Ground Moving Target Indication (SAR/GMTI) fast moving target Doppler ambiguity Radon transform.
Qian Jiang Wang Yu Li Lianghai Xing Mengdao Li Bingning
National Key Lab.of Radar Signal Processing,Xidian Univ.,Xi an 710071,China The 704th Institute of China Aerospace Science and Technology Corporation,Beijing 100076,China PLA 61191,Hangzhou 310023,China
国际会议
2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)
西安
英文
201-205
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）