1. A system comprising: a non-linear subsystem configured to receive an input signal and provide an output signal, the non-linear subsystem having a linear characteristic and a non-linear characteristic; a predistorter configured to effect predistortion of the input signal of the non-linear subsystem to compensate for the non-linear characteristic of the non-linear subsystem; and an adaptor configured to adaptively configure the predistorter based on a model of the non-linear subsystem that is a concatenation of a non-linear model of the non-linear characteristic of the non-linear subsystem followed by a linear model of the linear characteristic of the non-linear subsystem.