Patent ID: 6853961
Filing Date: 2005-02-08
Classification: G06F,G06K

Abstract:
1. A process for estimating a correlation matrix of signals of unknown characteristics, which are received by an array comprising a number N of sensors, to process signals received by said array, said sensors receiving at least first signals of unknown characteristics and second signals of known characteristics, the first and second signals together forming sensor signals, the process comprising: a) determining a correlation matrix {circumflex over (R)}s or Rs,α of the signals of known characteristics; b) estimating a correlation matrix {circumflex over (R)}x of the sensor signals; c) forming a matrix A equal to A={circumflex over (R)}s d) decomposing the matrix A into eigenelements to obtain its eigenvalues λ e) constructing a matrix B having eigenvectors v1 substantially equal to the eigenvectors u f) determining an estimated correlation matrix {circumflex over (R)}b of interfering signals based on the estimated matrix {circumflex over (R)}s and the matrix B, such that {circumflex over (R)}b={circumflex over (R)}s