Application of the fast multipole method to the generalized forward-backward iterative algorithm

In a previous work, rite generalized forward-backward (GFB) method was prop osed to compute the scattering from targets on rough ocean-like surfaces. I n this paper, we develop an acceleration of the GFB method bused on the fas t multipole method (FMM). The FMM is adapted ro reduce the operational cost associated with the iterative computations in the target regions. The prop osed method is shown to converge in a low number of iterations and allows a significant reduction in the computational and storage costs with respect to the conventional GFB formulation. (C) 2000 John Wiley & Sons, Inc.