TY - GEN
T1 - Sparse contrast-source inversion using linear-shrinkage-enhanced inexact Newton method
AU - Desmal, Abdulla
AU - Bagci, Hakan
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2014/7
Y1 - 2014/7
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/564943
UR - http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6904763
UR - http://www.scopus.com/inward/record.url?scp=84907870603&partnerID=8YFLogxK
U2 - 10.1109/APS.2014.6904763
DO - 10.1109/APS.2014.6904763
M3 - Conference contribution
SN - 9781479935406
SP - 870
EP - 871
BT - 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -