This paper presents a non-linear distortion compensator for OFDM (Orthogonal Frequency Division Multiplexing) systems. OFDM signals are sensitive to non-linear distortions and different methods are studied to limit them. In the proposed technique, the correction is done at the receiver level by a higher-order neural network. Simulations show that the neural network brings perceptible gains in a complete OFDM system. This paper presents the OFDM, and explains why the non-linearities are a problem with this kind of modulation.
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