Scattering from a multiple-layered random medium

The effects of multiple scattering on the backscattered signal from random irregularities have been widely investigated. In this paper, these earlier results are generalized to the case when the scattering region is layered, with each layer having its own independent statistics. By applying the path-integral technique, especially the composition law, the scattering cross section for an n-layered random medium is evaluated. More detailed investigations are made of the two-layered medium in which there exists a homogeneous layer between the transmitter (receiver) and the scattering layer. Numerical results are obtained to show how such a homogeneous layer can alter both the backscattered power and the enhancement cone.