Multichannel self-optimizing active noise control scheme

The problem of cancellation of a nonstationary sinusoidal interference, acting at the output of an unknown multivariable linear stable plant, is considered. The proposed cancellation scheme is a nontrivial extension of the SONIC (self-optimizing narrowband interference canceller) algorithm, developed earlier for single-input, single-output plants. In the important benchmark case - for disturbances with random-walk-type amplitude changes - the designed closed-loop control system converges locally in mean to the optimal one.