Development of a post-detection equalization technique for multicarrier modulation/demodulation systems

This paper is concerned with the development of a post-detection equalization technique for filterbank-based multicarrier modulation/demodulation systems. This technique is based on the equalization of the channel fractional delay in each subchannel in time synchronization with the constituent decimator at the receiver end, achieved through the exploitation of a subset of the signal samples at the input of the decimator. The resulting equalization gives rise to a high signal-to-noise ratio while requiring a short equalizer length. Moreover, it permits a tradeoff between various equalization parameters, leading to high computational flexibility. The search for an optimal solution can be constrained to within the channel lower and upper group-delay bounds within each subchannel, significantly simplifying the equalizer training.