NDLI: 2D spatial-variant phase errors compensation for ISAR imagery based on contrast maximisation

Content Provider	IET Digital Library
Author	Darong, Huang Cunqian, Feng Ningning, Tong Yiduo, Guo
Abstract	Range and azimuth spatial-variant phase errors are usually presented in high-resolution inverse synthetic aperture radar imagery as the manoeuvring motion of the observed targets. It could not be effectively compensated by the traditional autofocus algorithms. A new method is proposed for 2D spatial-variant phase errors compensation based on contrast maximisation. First, a novel phase error parametrical signal model is established. Then, image contrast is introduced as a cost function, and an iterative, modified gradient-based method is used to solve a maximal contrast optimisation problem. The proposed method has a good convergence within a few iterations. The public data provided by the Naval Research Laboratory is utilised to confirm the effectiveness and superiorities of the proposed method.
Starting Page	1480
Ending Page	1482
Page Count	3
ISSN	00135194
Volume Number	52
e-ISSN	1350911X
Issue Number	Issue 17, Aug (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/52/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2016.1595
Journal	Electronics Letters
Publisher Date	2016-07-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D Spatial-variant Phase Errors Compensation Azimuth Spatial-variant Phase Error Contrast Maximisation Convergence of Numerical Method Cost Function Error Compensation Gradient Method High-resolution Inverse Synthetic Aperture Radar Imagery Interpolation And Function Approximation Iterative Method Maximal Contrast Optimisation Problem Modified Gradient-based Method Motion Compensation Naval Research Laboratory Novel Phase Error Parametrical Signal Model Numerical Analysis Optical, Image And Video Signal Processing Optimisation Optimisation Technique Radar Equipment Radar Imaging Range Spatial-variant Phase Error Synthetic Aperture Radar System And Application TSAR Imagery
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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