A Filtered Multitone Modulation Modem for Multiuser Power Line Communications with an Efficient Implementation

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 interbank and the analysis interbank 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.