System for the generation of a time variant signal for suppression of a primary signal with minimisation of a prediction error

摘要

System for the generation of a time variant signal (sec(t)) for suppression of a primary signal (d(t)), comprising:   a control unit (1) having a forward filter (10) and/or a feedback filter (11) for providing a cancellation control signal (u(t));   cancellation-generating means (2) for generating a cancellation signal which is propagated along a secondary path with transfer function A/B and then providing the time variant signal (sec(t)),   sensor means (4) for measuring a residual signal (ε(t)),   update means (5) for providing an update signal (up¯(t)) for updating the filter coefficients in the control unit and   a prediction filter (8) within the update unit (5), which is intended to generate a predicted value (ypred(t)) which is equal to the anticipated output value of the sensor means (4) at a specific point in time, if the coefficients of the filters (10; 11) had had the most recently obtained values during the entire reaction time of the secondary transfer path.