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http://dx.doi.org/10.5515/KJKIEES.2017.28.2.139

Ground Moving Target's Velocity Estimation in SAR-GMTI  

Bae, Chang-Sik (Department of Radio Sciences and Engineering, Kwangwoon University)
Jeon, Hyeon-Mu (Department of Radio Sciences and Engineering, Kwangwoon University)
Yang, Dong-Hyeuk (Department of Radio Sciences and Engineering, Kwangwoon University)
Yang, Hoon-Gee (Department of Radio Sciences and Engineering, Kwangwoon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.2, 2017 , pp. 139-146 More about this Journal
Abstract
A ground moving target's velocity estimation algorithm applicable for a SAR-GMTI system using 2 channel displaced phase center antenna(DPCA) is proposed. In this algorithm, we assume target's across-track velocity can be estimated by along-track interferometry (ATI) and present a method to estimate target's along-track velocity. To accomplish this method, we first transform a radar-target geometry in which a moving target has zero velocity via altering a radar velocity such that target's velocity is reflected into it and next manipulate the spectral centers of the subapertures within the synthetic aperture. The validity of the proposed algorithm is demonstrated through simulation results showing the performance of the target's velocity estimation and the enhancement of reconstructed target image quality in terms of resolution and SINR.
Keywords
SAR; GMTI; SAR-GMTI; Along-Track Velocity Estimation; Subaperture;
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