Patent Document ID: 8521799
Application ID: 12165209
Patent Flag: 1

Claim One:
1. A row-vector norm comparison apparatus for an inverse matrix of a matrix, the apparatus comprising: at least one controller circuit configured to execute one or more modules, the one or more modules including: an input matrix processing module that receives constituent elements of the matrix and combines the input constituent elements; a cofactor operation module that multiplexes the combination result of the constituent elements output from the input matrix processing module to calculate factors constituting an adjoint matrix of the matrix; a square calculation module that squares the factors output from the cofactor operation module; a summation module that selects a predetermined number of factors among the squared factors and sums the selected factors to calculate the norms of row-vectors in the inverse matrix; and a norm comparison module that compares the norms of the row vectors calculated by the summation module and outputs the comparison result, wherein the cofactor operation module includes: at least one first multiplexer that receives and multiplexes two combination results of the constituent elements from the input matrix processing module; at least one subtractor that selects part of the outputs of the first multiplexer and performs subtraction between the selected outputs; at least one second multiplexer that receives and multiplexes the combination results of the constituent elements from the input matrix processing module and the output of the subtractor; and at least one common factor generation module that receives the outputs from two multiplexers, and calculates the factors constituting the adjoint matrix of the matrix.