Patent ID: 7844407
Filing Date: 2010-11-30
Classification: G01R,G06F

Abstract:
1. A computer-implemented method for determining the unknown physical sources of an object arising from a physical excitation of the object that produces the sources, the object having associated therewith a system interaction matrix, Z, that is characteristic of the object and that depends on the object's geometry, comprising: determining source locations from a geometry of the object stored in a tangible memory of the computer; ordering and grouping the source locations according to their distance from a reference point so that factors of the system interaction matrix can be approximated by blocks of low rank; logically partitioning the memory in a compressed outer product form to partition the system interaction matrix into 9 or more blocks, Z for the partition chosen, computing terms of a Lower Upper (LU) factorization of the partitioned system interaction matrix, wherein the LU factors are chosen to have the following relationship: and wherein terms of the L and U blocks of this factorization are computed and stored in a compressed outer product form and where Dinv determining the physical sources, J