Wavelet-OFDM versus filtered-OFDM in power line communication systems

Filtered orthogonal frequency division multiplexing (filtered-OFDM) and wavelet-OFDM are two modulation methods that have been proposed by the IEEE P1901 working group for data transmission over power lines. The filtered-OFDM is a modified version of the conventional OFDM that is designed to avoid the AM and amateur radio bands effectively. Although OFDM is a matured technology and thus it might be a preferred technology for most of the PLC industry (e.g., HomePlug Powerline Alliance), the acceptance of wavelet-OFDM as an alternative technology is because of a number of appealing advantages that it offers. The goal of this paper is to provide a bandwidth efficiency comparison of filtered-OFDM and wavelet-OFDM.