Patent ID: 6654719
Filing Date: 2003-11-25
Classification: G06K,H04L

Abstract:
A method for blind separation of independent source signals, comprising the steps of:(a) receiving a plurality of input signals which is the result of a plurality of independent source signals having passed through a transmission channel; (b) spatially prewhitening said plurality of input signals to satisfy a prescribed orthogonality constraint and to generate a plurality of first signals; (c) employing a filtering matrix supplied with said plurality of first signals to produce a plurality of recovered signals; (d) updating said filtering matrix in response to said plurality of first signals and said plurality recovered signals; (e) projecting said updated filtering matrix to the closest unitary filtering matrix; (f) outputting said plurality of recovered signals as representations of said plurality of independent source signals when said updated filtering matrix has converged; (g) when said updated filtering matrix has not converged, employing said closest unitary matrix as a new filtering matrix in step (c) and repeating appropriate ones of steps (c) through (g) until said filtering matrix has sufficiently converged.