Algoritmo Iterativo para Cancelamento de Distorções Não Lineares em Sistemas OFDM Cooperativos AF com Diversidade Cooperativa

In this paper, we propose an iterative algorithm for canceling, at the receiver, nonlinear (NLs) distortions inserted by PAs at source and relay in cooperative OFDM systems Amplifyand-Forward (AF). This algorithm presents in its structure blocks that that perform a pre-whitening of the received signals, combine them through the maximum ratio (MRC) combination method and then estimate and cancel the NLs distortions. We consider and, then, that the receiver has full knowledge about the state of the channels. The proposed technique was evaluated in terms of the symbol error rate (SER) through numerical simulations.