BLIND SIGNAL EXTRACTION Russian patent published in 2011 - IPC G10L21/02 

FIELD: information technology.

SUBSTANCE: first transform is applied to a time-discrete input signal in order to generate a subband input signal. The transform is repeated for all time instants. For each subband on each repetition step, the intermediate value of the subband output signal is determined, as well as the value of the modified subband output signal by applying a nonlinear function to the intermediate value of the subband output signal. The sequence of correction coefficient, the sequence of combined filtration coefficients and the value of the subband output signal are determined. The sequence of intermediate filtration coefficients is established. For each subband, a subband output signal and a time-discrete output signal are generated by applying a second transform to a set of all subband output signals, where the second transform is the inverse of the first transform.

EFFECT: method and device for extracting an unknown signal from a mixed combination of signals with minimum volume of known information on the signals.

16 cl, 19 dwg