FBMC-OFDM: Prototype filter comparison

Frequency response of prototype filter for FBMC and OFDM

The main difference between FBMC and OFDM is the choice of the prototype filter. Such that OFDM uses a rectangular window filter and FBMC using a prototype filter designed with the Nyquist pulse shaping principle, which can reduce greatly the spectral leakage problem of OFDM. This results in negligible ISI and ICI.