Title :
A novel multi-channel SAR-GMTI algorithm based on raw data
Author :
Liu, Anna ; Chen, Li ; Zhao, Fei ; Kuang, Gangyao
Author_Institution :
Coll. of Electron., Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
This paper presents a novel SAR-GMTI algorithm based on the range-compressed raw data. FrFT is introduced to the classical three-channel DPCA system to realize the moving target detection, parameter estimation and SAR imaging, acquiring an exact GMTI image of accelerative moving targets. As a pretreatment, Keystone transform is firstly applied to process the echoes receiving from each sub-aperture respectively in order to remove the range migration. Our scheme is available even under a clutter-rich and low SNR environment. The simulation results indicate the efficiency of the method.
Keywords :
Fourier transforms; echo; object detection; parameter estimation; radar antennas; radar imaging; synthetic aperture radar; Keystone transform; SAR imaging; accelerative moving targets; clutter; displaced phase center antenna; echoes; fractional Fourier transform; ground moving target indication; low SNR environment; moving target detection; multichannel SAR-GMTI algorithm; parameter estimation; range-compressed raw data; three-channel DPCA system; Chirp; Clutter; Equations; Fourier transforms; Object detection; Parameter estimation; Signal to noise ratio; DPCA; FrFT; GMTI; Keystone; SAR;
Conference_Titel :
Image and Signal Processing (CISP), 2010 3rd International Congress on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6513-2
DOI :
10.1109/CISP.2010.5646306
