Joint Predistortion and nonlinear equalization for High-capacity Wireless Links

A nonlinearity compensation scheme for a high-capacity wireless link employing multilevel QAM as the signalling format is discussed. The distinctive feature of this scheme is that the linearisation task is split over a predistorter and a nonlinear equaliser, to be implemented at the transmit and receive sections, respectively. It is shown that this scheme considerably relieves the overall computational requirement for nonlinear channel compensation, as compared to the approach in which the task of linearisation is entirely allocated to a nonlinear equaliser without any signal pre distortion.