Delay-Doppler-Domain Channel Estimation and Reduced-Complexity Detection of Faster-Than-Nyquist Signaling Aided OTFS

Abstract

Orthogonal Time Frequency Space (OTFS) modulation represents a promising candidate for high-mobility communications. This paper introduces an innovative delay-Doppler-domain channel estimation scheme and a reduced-complexity detector designed specifically for Faster-Than-Nyquist (FTN) signaling-aided OTFS systems. By utilizing the sparse representation of the channel in the delay-Doppler domain, we design an efficient estimation technique that resists fast fading. This allows reduced symbol-detection complexity without compromising performance, facilitating high-speed and high-mobility communications.

Download

• You can find the paper here.

Citation

Zekun Hong, Shinya Sugiura, Chao Xu, and Lajos Hanzo. 2026. “Delay-Doppler-Domain Channel Estimation and Reduced-Complexity Detection of Faster-Than-Nyquist Signaling Aided OTFS.” IEEE Open Journal of Vehicular Technology 7: 659–675. https://doi.org/10.1109/OJVT.2026.3655621 .

@article{hong2026delay,
  author = {Hong, Zekun and Sugiura, Shinya and Xu, Chao and Hanzo, Lajos},
  doi = {10.1109/OJVT.2026.3655621},
  journal = {IEEE Open Journal of Vehicular Technology},
  pages = {659--675},
  title = {Delay-Doppler-Domain Channel Estimation and Reduced-Complexity Detection of Faster-Than-Nyquist Signaling Aided OTFS},
  volume = {7},
  year = {2026}
}