SVD post-compression combined with shielded-block preconditioner

We present a post-compression method based on the Singular Value Decomposition that can be used to retrieve the low-rank representation of the Method of Moments interaction matrix after using the shielded-block preconditioner. A compression ratio of more than 17 has be achieved without significant loss of accuracy. The time needed to compress the preconditioned matrix is negligible with respect to the preconditioning time. We also show that the compression can decrease the solution complexity using iterative solvers or multiple-scattering MBFs, thereby significantly decreasing the total computation time.