Comparison of particle swarm optimization and asynchronous particle swarm optimization for inverse scattering of a two- dimensional perfectly conducting cylinder

Article type: Research Article

Authors: Chiu, Chien-Ching^{a; *} | Sun, Chi-Hsien^a | Chang, Wan-Ling^a

Affiliations: [a] Electrical Engineering Department, Tamkang University, Tamsui, Taiwan

Correspondence: [*] Corresponding author. Dr. Chien-Ching Chiu, Department of Electrical Engineering, Tamkang University, Tamsui 25137, Taiwan. Fax: +886 2 26209814; E-mail: [email protected]

Abstract: This paper reports a two dimensional time domain inverse scattering algorithm based upon the finite-difference time domain method for determining the shape of perfectly conducting cylinder. Finite difference time domain method (FDTD) is used to solve the scattering electromagnetic wave of a perfectly conducting cylinder. The inverse problem is resolved by an optimization approach and the global searching scheme asynchronous particle swarm optimization (APSO) is then employed to search the parameter space. By properly processing the scattered field, some EM properties can be reconstructed. One is the location of the conducting cylinder, the others is the shape of the perfectly conducting cylinder. This method is tested by several numerical examples; numerical results indicate that the APSO outperforms the PSO in terms of reconstruction accuracy and convergence speed. Both techniques have been tested in the case of simulated measurements contaminated by additive white Gaussian noise.

Keywords: Index terms – inverse scattering, time domain, FDTD, subgridding finite difference time domain, asynchronous particle swarm optimization (APSO), cubic-spline

DOI: 10.3233/JAE-2011-1336

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 35, no. 4, pp. 249-261, 2011