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Characterization of the Distortion of OFDM/OQAM Modulations Under Frequency Selective Channels

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Executive Summary

Filterbank based multicarrier modulations are well known to perform poorly in frequency selective channels when single tap carrier-by-carrier equalization is used. This degradation is caused by the inherent distortion in terms of inter-symbol and inter-carrier interference at the receiving side, which cannot be compensated via single-tap equalization. The authors provide here an asymptotic characterization of this effect. More specifically, they derive the asymptotic distortion after a single-tap perfect equalizer under the assumption that the number of carriers is asymptotically large.

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