Green hybrid FMT for WLAN applications

In this paper we propose a novel multicarrier (MC) architecture to address the energy saving problem in WLAN applications. We refer to this scheme as hybrid filtered multitone (H-FMT). Depending on the channel condition, H-FMT wisely switches between Filtered Multitone Modulation (FMT) with orthogonal pulses and adaptive orthogonal frequency division multiplexing (A-OFDM). We show that H-FMT provides a considerable gain in terms of energy efficiency compared to conventional OFDM, yet achieving the same rate. Furthermore, its additional computational complexity is negligible, making this scheme an attractive solution for WLAN applications.