NDLI: Efficient grouping technique for low mutual-coherence basis matrix in radar imaging

Content Provider	IET Digital Library
Author	Alkhodary, M. T. Muqaibel, A. H.
Abstract	Sparse reconstruction has been recently proposed to overcome many challenges in radar imaging applications. In sparse reconstruction framework, the basis matrix of high-resolution radar image demonstrates high mutual coherence, which is inversely proportional to the quality of the reconstructed image. The high mutual coherence, also, weakens the noise immunity in the sparse reconstruction. A technique for building a basis matrix with low mutual coherence is proposed which preserves the high quality of the resultant radar image. The proposed technique groups the columns of the original basis matrix that share the same range of time delay into one column with the average time delay of the group. The resultant basis matrix is used in a sparse reconstruction algorithm to reconstruct the pixel values of a radar image. The technique was validated over realistic and simulated radar measurements and was shown to be computationally efficient with improved noise immunity.
Starting Page	115
Ending Page	117
Page Count	3
ISSN	00135194
Volume Number	53
e-ISSN	1350911X
Issue Number	Issue 2, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/53/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2016.3898
Journal	Electronics Letters
Publisher Date	2016-12-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Grouping Technique High-resolution Radar Image Basis Matrix Image Quality Image Reconstruction Image Resolution Low Mutual-coherence Basis Matrix Matrix Algebra Noise Immunity Optical, Image And Video Signal Processing Radar Equipment Radar Imaging Radar Imaging Application Radar Measurement Radar Resolution Radar Theory Sparse Reconstruction Framework System And Application Time Delay
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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