Uniform Rotational Motion Compensation for ISAR Based on Phase Cancellation

Targets with uniform rotational motion may cause migration through cross-range cells during the imaging time, which makes the inverse synthetic aperture radar image smeared. Traditional motion compensation methods hardly work well because it is difficult to estimate the quadratic phase error (QPE) c...

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Published in:IEEE geoscience and remote sensing letters 2011-07, Vol.8 (4), p.636-640
Main Authors: Hu, Jiemin, Zhou, Wei, Fu, Yaowen, Li, Xiang, Jing, Ning
Format: Article
Language:English
Subjects:
Cancellation
Estimation
Focusing
Inverse synthetic aperture radar (ISAR) imaging
Least squares method
Migration
Motion compensation
phase cancellation (PC)
Phase error
Polycarbonates
Radar imaging
Rotational
rotational motion compensation
Sonar navigation
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description Targets with uniform rotational motion may cause migration through cross-range cells during the imaging time, which makes the inverse synthetic aperture radar image smeared. Traditional motion compensation methods hardly work well because it is difficult to estimate the quadratic phase error (QPE) caused by uniform rotational motion efficiently. To solve this problem, a novel QPE estimation method based on phase cancellation (PC) is proposed in this letter. In this method, PC is used to eliminate the linear term of the phase, which is a disadvantage to the QPE estimation. By employing the weighted linear least squares algorithm, the QPE can be estimated efficiently and robustly. Experiments with both simulated and measured radar data demonstrate the performance of the proposed method.
doi_str_mv 10.1109/LGRS.2010.2098841
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source IEEE Electronic Library (IEL) Journals
subjects Cancellation
Estimation
Focusing
Inverse synthetic aperture radar (ISAR) imaging
Least squares method
Migration
Motion compensation
phase cancellation (PC)
Phase error
Polycarbonates
Radar imaging
Rotational
rotational motion compensation
Sonar navigation
title Uniform Rotational Motion Compensation for ISAR Based on Phase Cancellation
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