Title :
Parameter Estimations of SAR Moving Target Based on DPCA-FrFT Algorithm
Author :
Sun, Huadong ; Su, Fulin ; Gao, Jianjun ; Cao, Xinghui
Author_Institution :
Harbin Inst. of Technol., Harbin
Abstract :
The DPCA-FrFT algorithm is used in this paper to realize the localization and velocity estimations in both ground range direction and azimuth direction when it comes to a two-aperture radar system. The moving point target´s echo model of two-aperture SAR system is established. Then, the linear frequency-modulated characteristics of moving target´s DPCA signal is elaborated. According to this characteristics, fractional Fourier transform is adopted to detect the moving target and estimate parameters. Because of the good capability of DPCA technique for clutter cancellation and the nice effect of FrFT for chirp signal detection, the DPCA-FrFT algorithm can suppress the clutter and realize the localization and velocity estimations well in different signal-to-noise ratio conditions. The simulation results validate the effectiveness of this algorithm.
Keywords :
Fourier transforms; object detection; parameter estimation; synthetic aperture radar; target tracking; DPCA algorithm; SAR moving target; azimuth direction; clutter cancellation; fractional Fourier transform; ground range direction; localization estimation; moving point target´s echo model; moving target detection; parameter estimations; two-aperture radar system; Parameter estimation;
Conference_Titel :
Industrial Electronics and Applications, 2007. ICIEA 2007. 2nd IEEE Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-0737-8
Electronic_ISBN :
978-1-4244-0737-8
DOI :
10.1109/ICIEA.2007.4318716