NDLI: Fast moving target imaging and motion parameters estimation based on Radon transform and bi-directional approach

Content Provider	IET Digital Library
Author	Hou, Lili Song, Hongjun Zheng, Mingjie Wang, Wei
Abstract	Current algorithms for focusing a moving target usually adopt the quadratic approximation when expanding the range equation of the moving target. However, for a fast moving target, the cubic term of the range equation may lead to severe azimuth side-lobe asymmetry, which affects the quality of SAR image and thus degrades the recognition performance. Therefore, the cubic term cannot be ignored. In addition, motion parameters estimation is a key step for focusing the moving target, but the existing algorithms suffer from ambiguity, complex realisation, or heavy computation load while estimating the motion parameters of the fast moving target. To address this issue, this study proposes a novel algorithm for focusing the fast moving target and estimating its motion parameters. First, the cubic term of the range equation is kept and its impact on the imaging quality is analysed. Then, radial velocity estimation is converted into extracting the slope of the range walk trajectory, and the imaging quality of the fast moving target is improved by removing the effect of the cubic term. Finally, the Bi-Directional approach is utilised to estimate the along-track velocity with low computation load. Both simulated and real data are used to demonstrate the validity of the proposed algorithm.
Starting Page	1013
Ending Page	1023
Page Count	11
ISSN	17518784
Volume Number	10
e-ISSN	17518792
Issue Number	Issue 6, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/10/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2014.0567
Journal	IET Radar, Sonar & Navigation
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Along-track Velocity Estimation Approximation Theory Azimuth Side-lobe Asymmetry Bidirectional Approach Fast Moving Target Imaging Integral Transforms in Numerical Analysis Interpolation And Function Approximation Low Computation Load Motion Estimation Motion Parameter Estimation Numerical Analysis Optical, Image And Video Signal Processing Parameter Estimation Quadratic Approximation Radar Equipment Radar Imaging Radial Velocity Estimation Radon Transform Radon Transforms Range Equation Expansion Range Walk Trajectory Recognition Performance Degradation SAR Image Quality Slope Extraction Synthetic Aperture Radar System And Application
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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