Sparse contrast-source inversion using linear-shrinkage-enhanced inexact Newton method

Abdulla Desmal, Hakan Bagci

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A contrast-source inversion scheme is proposed for microwave imaging of domains with sparse content. The scheme uses inexact Newton and linear shrinkage methods to account for the nonlinearity and ill-posedness of the electromagnetic inverse scattering problem, respectively. Thresholded shrinkage iterations are accelerated using a preconditioning technique. Additionally, during Newton iterations, the weight of the penalty term is reduced consistently with the quadratic convergence of the Newton method to increase accuracy and efficiency. Numerical results demonstrate the applicability of the proposed method.
Original languageEnglish (US)
Title of host publication2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages870-871
Number of pages2
ISBN (Print)9781479935406
DOIs
StatePublished - Jul 2014

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