title: Application of signal-subspace and optimization methods in reconstructing extended scatterers.
abstract: A signal-subspace approach to reconstruct the permittivities of extended scatterers in two-dimensional settings is proposed. A portion of the scatterers' information is retrieved by the signal-subspace method, and the remaining part is obtained by solving a nonlinear least-squares problem. The method exhibits several strengths, including robustness against noise, fast convergence, less scattering data, high resolution, and the ability to deal with scatterers of special shapes.
authors.affiliation: Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576. elechenx@nus.edu.sg
authors.forename: Xudong
authors.initials: X
authors.lastname: Chen