Precoded Faster-Than-Nyquist Signaling Using Optimal Power Allocation for OTFS

Abstract

In this work, we present a power-allocated precoded Faster-Than-Nyquist (FTN) signaling scheme for Orthogonal Time Frequency Space (OTFS) systems. By utilizing an optimal power allocation strategy under a total transmit power constraint, we maximize the achievable information rate while mitigating the severe inter-carrier and inter-symbol interference of non-orthogonal signaling. Numerical simulations verify that the proposed power-allocated FTN-OTFS transceiver outperforms conventional orthogonal systems and unprecoded architectures.

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Citation

Zekun Hong, Shinya Sugiura, Chao Xu, and Lajos Hanzo. 2025. “Precoded Faster-Than-Nyquist Signaling Using Optimal Power Allocation for OTFS.” IEEE Wireless Communications Letters 14 (1): 173–177. https://doi.org/10.1109/LWC.2024.3489421 .

@article{hong2025precoded,
  author = {Hong, Zekun and Sugiura, Shinya and Xu, Chao and Hanzo, Lajos},
  doi = {10.1109/LWC.2024.3489421},
  journal = {IEEE Wireless Communications Letters},
  number = {1},
  pages = {173--177},
  title = {Precoded Faster-Than-Nyquist Signaling Using Optimal Power Allocation for OTFS},
  volume = {14},
  year = {2025}
}