NDLI: Radial velocity estimation of moving target based on maximum likelihood estimation

Content Provider	IET Digital Library
Author	Gao, Yesheng Guo, Xiaojiang Liu, Xingzhao
Abstract	For conventional multichannel synthetic aperture radar (SAR) systems, the pulse repetition frequency is greater than the azimuth Doppler bandwidth. Therefore, each receive channel can obtain unambiguous SAR image and the moving target usually overlaps with no more than one clutter. However, for high-resolution wide-swath (HRWS) SAR systems, the PRF is usually much less than the Doppler bandwidth and thus the moving target may overlap with quite a few clutters, which will severely affect the estimation of the radial velocity of the moving target. A novel radial velocity estimation method based on maximum likelihood estimation (MLE) for HRWS SAR systems is presented. Even if the moving target overlaps with quite a few clutters, the proposed MLE method can still effectively estimate the radial velocity. In order to reduce the computational load, the proposed method transforms the multi-dimensional spectral peak searching of MLE into one-dimensional peak searching and reduces the times of matrix inversion by a block matrix method. Theoretical analysis and experiments demonstrate the feasibility of the proposed method.
Starting Page	1001
Ending Page	1003
Page Count	3
ISSN	00135194
Volume Number	54
e-ISSN	1350911X
Issue Number	Issue 16, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/54/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2018.0921
Journal	Electronics Letters
Publisher Date	2018-06-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Azimuth Doppler Bandwidth Block Matrix Method Clutter Conventional Multichannel Synthetic Aperture Radar System Doppler Radar High-resolution Wide-swath SAR System HRWS SAR System Image Resolution Matrix Inversion Maximum Likelihood Estimation MLE Method Moving Target Multidimensional Spectral Peak Searching Novel Radial Velocity Estimation Method One-dimensional Peak Searching Optical, Image And Video Signal Processing Pulse Repetition Frequency Radar Equipment Radar Imaging Statistics Synthetic Aperture Radar System And Application Unambiguous SAR Image
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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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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