OFDM Receivers with Iterative Nonlinear Distortion Cancellation

LEONARDO BALTAR; STEFAN DIERKS; FERNANDO GREGORIO; JUAN COUSSEAU; JOSEF NOSSEK

Conferencia; Signal Processing Advances for Wireless Communications SPAWC 2010; 2010

We propose two practical schemes for the cancellation of nonlinear distortions caused by the power amplifiers (PA) in Orthogonal Frequency Division Multiplexing (OFDM) systems. The algorithms are iterative and located at the receiver. They utilize a soft channel decoder to improve the capabilities of the distortion estimation and relay all the computational complexity to the receiver. Simulation results show that the algorithm can improve the coded bit error rate (BER) to levels close to the linear system case.