Investigation of Accelerated Monostatic Radar Cross Section Computations by Using Block and Projection Iterative Methods

Accurate numerical solutions of scattering phenomena can be achieved by method of moments (MoM) solutions of integral equations. For the evaluation of the monostatic radar cross section (RCS) of an object, the same system of equations has to be solved many times for different excitation fields incident from many directions. Especially for electrically large bodies involving many millions of unknowns, this becomes computationally demanding. In this work, we study and compare the performance of block and projection iterative methods for MoM solutions of surface integral equations related to perfect electrically conducting objects. Both methods are capable of reducing the overall number of matrix-vector products in the considered iterative solution process.