Reduced-Complexity MIMO Faster-Than-Nyquist Signaling Transceiver for OTFS Modulation

Abstract

Combining Multiple-Input Multiple-Output (MIMO) with Faster-Than-Nyquist (FTN) signaling and Orthogonal Time Frequency Space (OTFS) modulation achieves high data rates in doubly selective channels. However, the multi-user interference and inter-symbol interference lead to unaffordable receiver complexity. In this paper, we design a reduced-complexity MIMO FTN-OTFS transceiver architecture. We utilize channel diagonalization and iterative interference cancellation methods to lower the computational overhead from cubic to linear-logarithmic scale while retaining excellent error performance.

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Citation

Zekun Hong and Shinya Sugiura. 2025. “Reduced-Complexity MIMO Faster-Than-Nyquist Signaling Transceiver for OTFS Modulation.” IEEE Open Journal of the Communications Society 6: 6126–6141. https://doi.org/10.1109/OJCOMS.2025.3590518 .

@article{hong2025reduced,
  author = {Hong, Zekun and Sugiura, Shinya},
  doi = {10.1109/OJCOMS.2025.3590518},
  journal = {IEEE Open Journal of the Communications Society},
  pages = {6126--6141},
  title = {Reduced-Complexity MIMO Faster-Than-Nyquist Signaling Transceiver for OTFS Modulation},
  volume = {6},
  year = {2025}
}