Title :
A Velocity Estimation Algorithm of Moving Targets using Single Antenna SAR
Author :
Li, Gang ; Xia, Xiang-Gen ; Xu, Jia ; Peng, Ying-Ning
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
fDate :
7/1/2009 12:00:00 AM
Abstract :
A new algorithm is proposed for velocity estimation of moving targets in single antenna synthetic aperture radar (SAR). Based on the fact that different velocity vectors cause different geometrical figures of the two-dimensional (2-D) signature in the range-Doppler (RD) domain, this algorithm estimates the azimuth and range velocities by a 2-D search such that the range cell migration correction (RCMC) and the second range compression (SRC) are correctly performed. It is shown that, using the proposed algorithm, the Doppler ambiguity problem can be avoided and satisfactory accurate velocity estimation can be obtained in high signal-to-clutter ratio (SCR) scenarios.
Keywords :
Doppler radar; radar tracking; synthetic aperture radar; target tracking; velocity measurement; 2D search; 2D signature; Doppler ambiguity problem; azimuth estimation; geometrical figures; range cell migration correction; range velocity estimation; range-Doppler domain; second range compression; signal-to-clutter ratio; single antenna synthetic aperture radar; velocity estimation algorithm; velocity vectors; Algorithm design and analysis; Aperture antennas; Azimuth; Doppler shift; Frequency estimation; Matched filters; Phase estimation; Radar antennas; Synthetic aperture radar; Two dimensional displays;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2009.5259182
