Minimisation du TEB moyen d'un système OFDM precodé

The mean bit error rate (BER) minimization problem is studied for a linear precoded orthogonal frequency division multiplexing (LP-OFDM) system. Resource allocation algorithms are proposed to minimize the mean BER of the system for a target bit rate and a given power spectral density. The results are presented for a power line communication context and are compared with the classical margin maximization algorithms for OFDM and LP-OFDM systems. It is shown that the proposed allocation performs better than existing allocations specially for weak signal to noise ratio and also has reduced complexity.