Title :
Method of moments with wavelet expansions for dielectric surface scattering
Author :
Pérez, J. L Álvarez ; Marshall, S.J. ; Gregson, K.
Author_Institution :
Environ. Sci. Div., Nottingham Univ., UK
Abstract :
The use of the method of moments with wavelet bases is investigated for the problem of electromagnetic scattering from computer-simulated random dielectric surfaces. The method of moments (MoM) has already been used for testing the validity of several models of surface scattering by expanding the electromagnetic currents in pulse functions followed by point matching. This procedure has the problem that very large matrices are required to represent the integral operator. Due to their vanishing moment properties and the capability of wavelets to adjust themselves to a multi-scale scatterer, a MoM using wavelet expansions has been studied here for backscattering from dielectric rough surfaces. The application of a wavelet MoM with a threshold procedure is tested against the conventional MoM using pulse functions and point matching
Keywords :
backscatter; electromagnetic wave scattering; method of moments; random media; rough surfaces; wavelet transforms; backscattering; computer-simulated random dielectric surfaces; dielectric rough surfaces; dielectric surface scattering; electromagnetic scattering; method of moments; threshold procedure; wavelet bases; wavelet expansions; Backscatter; Dielectrics; Electromagnetic modeling; Electromagnetic scattering; Electromagnetic transients; Moment methods; Rough surfaces; Surface roughness; Surface waves; Testing;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.772116
