ACTA AERONAUTICAET ASTRONAUTICA SINICA >
High resolution imaging of moving targets based on ALPFT parameter estimation
Received date: 2024-04-10
Revised date: 2024-05-06
Accepted date: 2024-06-21
Online published: 2024-07-08
Supported by
Huaqiao University Talent Program(10BS312)
In this paper, the problem of parameter estimation and imaging of ground moving targets with constant acceleration for Frequency Modulated Continuous Wave Synthetic Aperture Radar (FMCW SAR) is studied. Firstly, the echo model of moving targets in the FMCW SAR system is established, and the Adaptive Local Polynomial Fourier Transform (ALPFT) is proposed to estimate the Doppler phase of echoes up to the fourth order. Secondly, the range migration terms are corrected by generalized Keystone transform and Hough transform, and the velocity information of moving targets is estimated at the same time. Finally, by compensating for the high-order Doppler phases and performing the azimuth resampling of non-central moving targets, all moving objects in the scene can be focused well. Simulation results verify the feasibility and effectiveness of the proposed method.
Jing HE , Gewei TAN . High resolution imaging of moving targets based on ALPFT parameter estimation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(1) : 330502 -330502 . DOI: 10.7527/S1000-6893.2024.30502
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