A computer-implemented method for providing an output signal by a touch-sensitive input unit includes detecting a sensor signal, wherein the sensor signal is time-resolved and spatially resolved with respect to a surface of the touch-sensitive input unit, and wherein the sensor signal includes unwanted-signal components. The method also includes determining the output signal by applying a trained function to input data, wherein the input data is based on the sensor signal, wherein the output signal is time-resolved and spatially resolved with respect to the surface of the touch-sensitive input unit, wherein at least one parameter of the trained function is based on a comparison with a sensor signal in the absence of unwanted-signal components. The method also includes providing the output signal.