A fast matrix pencil method in non-uniform sampling scheme for discrete complex image methods

Discrete complex image methods are of closed form methods for fast calculating Green's functions of stratified media, which have been widely discussed by many researchers. In the present paper, one fast non-uniform sampling matrix pencil method is proposed to improve the efficiency of discrete complex image methods. One numerical example and some comparisons are also provided, where a sampling scheme of two-segment is used in the proposed method, which validate its accuracy and improvement.