frft-cswsf: estimating cross-range velocities of ground moving targets using multistatic synthetic aperture radar

Clicks: 202
ID: 220925
2014
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Abstract
Estimating cross-range velocity is a challenging task for space-borne synthetic aperture radar (SAR), which is important for ground moving target indication (GMTI). Because the velocity of a target is very small compared with that of the satellite, it is difficult to correctly estimate it using a conventional monostatic platform algorithm. To overcome this problem, a novel method employing multistatic SAR is presented in this letter. The proposed hybrid method, which is based on an extended space-time model (ESTIM) of the azimuth signal, has two steps: first, a set of finite impulse response (FIR) filter banks based on a fractional Fourier transform (FrFT) is used to separate multiple targets within a range gate; second, a cross-correlation spectrum weighted subspace fitting (CSWSF) algorithm is applied to each of the separated signals in order to estimate their respective parameters. As verified through computer simulation with the constellations of Cartwheel, Pendulum and Helix, this proposed time-frequency-subspace method effectively improves the estimation precision of the cross-range velocities of multiple targets.
Reference Key
chenlei2014chinesefrft-cswsf: Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Li Chenlei;Liu Mei;Zhao Bowen;Zhang Lei
Journal Cancer epidemiology
Year 2014
DOI
10.1016/j.cja.2014.08.011
URL
http://www.sciencedirect.com/science/article/pii/S100093611400137X
Keywords
parameter estimation astronautics aeronautics

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