A system comprising: a non-linear subsystem configured to receive an input signal and provide an output signal; a predistorter configured to effect predistortion of the input signal of the non-linear subsystem to compensate for a non-linear characteristic of the non-linear subsystem ; a narrowband filter configured to receive a feedback signal representative of the output signal of the non-linear subsystem and output a filtered feedback signal having a bandwidth that is less than a bandwidth of the output signal of the non-linear subsystem ; and an adaptor configured to adaptively configure the predistorter based on the filtered feedback signal, characterized in that the adaptor is configured to adaptively configure the predistorter based on an input signal of the adaptor that is representative of the input signal of the non-linear subsystem by: providing the input signal of the adaptor to a non-linear model such that the non-linear model outputs a reference signal for the non-linear characteristic of the non-linear subsystem ; training an inverse model of the non-linear model based on the input signal of the adaptor and the reference signal for the non-linear characteristic of the non-linear subsystem ; and providing one or more parameters that define the inverse model to the predistorter to thereby adaptively configure the predistorter . a non-linear subsystem configured to receive an input signal and provide an output signal; a predistorter configured to effect predistortion of the input signal of the non-linear subsystem to compensate for a non-linear characteristic of the non-linear subsystem ; a narrowband filter configured to receive a feedback signal representative of the output signal of the non-linear subsystem and output a filtered feedback signal having a bandwidth that is less than a bandwidth of the output signal of the non-linear subsystem ; and an adaptor configured to adaptively configure the predistorter based on the filtered feedback signal, characterized in that the adaptor is configured to adaptively configure the predistorter based on an input signal of the adaptor that is representative of the input signal of the non-linear subsystem by: providing the input signal of the adaptor to a non-linear model such that the non-linear model outputs a reference signal for the non-linear characteristic of the non-linear subsystem ; training an inverse model of the non-linear model based on the input signal of the adaptor and the reference signal for the non-linear characteristic of the non-linear subsystem ; and providing one or more parameters that define the inverse model to the predistorter to thereby adaptively configure the predistorter . providing the input signal of the adaptor to a non-linear model such that the non-linear model outputs a reference signal for the non-linear characteristic of the non-linear subsystem ; training an inverse model of the non-linear model based on the input signal of the adaptor and the reference signal for the non-linear characteristic of the non-linear subsystem ; and providing one or more parameters that define the inverse model to the predistorter to thereby adaptively configure the predistorter . <EOS>