Improved L1/2 Threshold Iterative High Resolution SAR Imaging Algorithm

An improved Synthetic Aperture Radar (SAR) imaging algorithm is proposed to address the issues of low azimuth resolution and noise interference in the sparse sampling condition. Based on the existing L1/2 regularization theory and iterative threshold algorithm, the gradient operator is modified, whi...

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Bibliographic Details
Published inJournal of radars = Lei da xue bao Vol. 12; no. 5; pp. 1044 - 1055
Main Authors Zhiqi GAO, Shuchen SUN, Pingping HUANG, Yaolong QI, Wei XU
Format Journal Article
LanguageEnglish
Published China Science Publishing & Media Ltd. (CSPM) 01.10.2023
Subjects
approximate observation model
compressed sensing
l1/2 regularization theory
synthetic aperture radar (sar)
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ISSN2095-283X
DOI10.12000/JR22243

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Summary:An improved Synthetic Aperture Radar (SAR) imaging algorithm is proposed to address the issues of low azimuth resolution and noise interference in the sparse sampling condition. Based on the existing L1/2 regularization theory and iterative threshold algorithm, the gradient operator is modified, which can improve the solution accuracy of the reconstructed image and reduce the load of calculation. Then, under full sampling and under-sampling conditions, the original and improved L1/2 iterative threshold algorithm are combined with the approximate observation model to image SAR echo signals and compare their imaging performance. The experimental findings demonstrate that the improved algorithm improves the azimuth resolution of SAR images and has higher convergence performance.
ISSN:2095-283X
DOI:10.12000/JR22243