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 language||English (US)|
|Title of host publication||2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Number of pages||2|
|State||Published - Jul 2014|