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

Volume

3

fYear

2010

fDate

16-18 Oct. 2010

Firstpage

1489

Lastpage

1493

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Image and Signal Processing (CISP), 2010 3rd International Congress on

Conference_Location

Yantai

Print_ISBN

978-1-4244-6513-2

Type

conf

DOI

10.1109/CISP.2010.5646306

Filename

5646306