Design and performance evaluation of FBMC-based Orthogonal Time-Frequency Space (OTFS) system

The idea of an efficient multicarrier signaling technique is one of the critical challenges for beyond fifth-generation (B5G) of wireless communication networks. The B5G mobile networks require the multicarrier scheme featuring, immunity to multipath fading and inter-symbol interference (ISI), robustness against inter-carrier interference (ICI) and Doppler spread to outreach their purposes. Several Filter-based techniques such as Filter Bank Multicarrier (FBMC) and various Orthogonal Frequency Division Multiplexing (OFDM)-based techniques such as Universal Filtered Multicarrier (UFMC) and Generalized Frequency Division Multiplexing (GFDM) are proposed in recent studies. Besides, Orthogonal Time-Frequency Space (OTFS) technique is introduced newly as one of the potential waveform nominees for B5G which can outperform OFDM-based techniques in high mobility situations. One of the prominent benefits of the OTFS method is that it can be regarded as the pre- and post-processing steps for OFDM-based techniques. In this paper, we extended the FBMC scheme using the OTFS technique and propose a novel structure as FBMC-based OTFS technique which benefits from both strategies while reducing their deficiencies. Our concluded analyses and results can certificate our system superiority in error probability and time-spectral efficiency terms where the FBMC-based OTFS employing different types of filters are compared to the OFDM-based OTFS system. (c) 2022 Elsevier B.V. All rights reserved.