Abstract
Because of the inherent interference, it is difficult for filter-bank multi-carrier (FBMC) with the offset-quadrature amplitude modulation (OQAM) systems to achieve high-performance symbol detection, especially over the underwater acoustic (UWA) channels. This letter explores a novel receiver approach to solve this problem by establishing a unified transmission matrix (UTM) model and proposing a lattice-reduction-aided sphere decoder (LRA-SD). The simulation and sea trial results indicate that in the UWA FBMC/OQAM communication systems, the UTM-based LRA-SD outperforms the linear detectors and is more computationally efficient than the maximum likelihood (ML) detector.
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