Abstract
The Improved Forward Backward Method and Symmetric Successive over Relaxation (SSOR) method are proposed to compute electromagnetic (EM) scattering from 1-D dielectric rough surfaces. In addition the Spectral Acceleration (SA) technique is applied to reduce the computational complexity of each matrix-vector product from O(N 2 ) to O(N). The proposed methods are referred as IFBM-SA and SSOR-SA. They are compared with the FBM-SA which is a well-known and effective method in computing the scattering from randomly rough lossy surfaces in terms of convergence rate and run time. FBM-SA is shown to be a special case of SSOR-SA where the relaxation parameter is unity. The numerical analysis demonstrates that IFBM-SA has a higher convergence rate than the SSOR-SA and FBM-SA.
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