Microsoft Word - ISPLC2007_1

Abstract—In this paper we investigate filtered multitone modulation (FMT) for broadband multiuser powerline communications. FMT generalizes the popular OFDM scheme through the deployment of sub-channel shaping filters. We address the implementation problem, and we derive a novel efficient digital implementation of both the synthesis filterbank and the analysis filterbank assuming to multiplex the users via the tone allocation. A performance comparison with OFDMA is reported and shows that multiuser FMT has more robust performance in an asynchronous multiple access channel due to the higher spectral confinement of the sub-channels compared to OFDMA.