Parameter Estimation of Moving Target on Non-uniform Stereo Distributed SAR using FrFT-subspace Method

LIU Mei; LI Chenlei; GU Guanglin

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Parameter Estimation of Moving Target on Non-uniform Stereo Distributed SAR using FrFT-subspace Method

LIU Mei 1 * #,LI Chenlei 2,GU Guanglin 2

1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001

2.School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001

*Correspondence author

#Submitted by

Subject:

Funding: Research Fund for the Doctoral Program of Higher Education of China（No.No.20122302110012),National Natural Science Foundation of China）

Opened online: 2 October 2013

Accepted by: none

Citation: LIU Mei,LI Chenlei,GU Guanglin.Parameter Estimation of Moving Target on Non-uniform Stereo Distributed SAR using FrFT-subspace Method[OL]. [ 2 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4561333

The geometry of spaceborne distributed synthetic aperture radar (SAR) is generally non-uniform three-dimensional (3D) stereo, under which the conventional linear array processing algorithms are invalid to estimate motion parameters of ground moving target. To solve this problem, a novel parameter estimation method is presented in this paper. First, a novel signal model is derived for non-uniform stereo distributed SAR, then a method of space-time-frequency distribution (STFD) based on fractional Fourier transform (FrFT) and MUSIC is presented to estimate the azimuth initial location and range velocity, next a method of FrFT-CROCOSMUSIC is presented to estimate the azimuth velocity, finally the performances of the method is studied via computer simulations. Comparing with conventinonal FrFT method, the presented method is more effective.

Keywords:Radar engineering; distributed SAR; fractional Fourier transform(FrFT); MUSIC

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