On the Effect of Time-Variant Frequency Selective Fading in an FMT Modulated System

We present a general analysis framework to analyze the performance of filtered multitone (FMT) modulation systems in time-frequency selective fading channels. FMT is a generalization of the OFDM scheme that deploys sub-channel shaping pulses. The results are specialized for several pulses: root-raised cosine, Gaussian, sine and rectangular (OFDM). They allow to benchmark the multitone system and understand how robust it is to frequency selective time-variant fading. An analysis both in terms of SIR and bit-error-rate is made. Remarks on the prototype pulse design are also reported. The better sub-channel spectral containment of FMT yields increased robustness compared to OFDM.