Joint Optimization of Integrated Sensing and Communications in Precoded Multi-Carrier Faster-Than-Nyquist Signaling

Abstract

In this paper, we propose a precoded faster-than-Nyquist (FTN) dual-functional integrated sensing and communication (ISAC) waveform, which improves the information rate of the conventional orthogonal multi-carrier architecture. The detection complexity of FTN signaling is maintained low with the aid of fast Fourier transform (FFT)-based diagonalization. Under transmit power constraints, we optimize both sensing and communication performances jointly to find the optimal precoder and power allocation strategy, showing significant improvement in spectral efficiency and sensing accuracy.

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Citation

Zekun Hong and Shinya Sugiura. 2026. “Joint Optimization of Integrated Sensing and Communications in Precoded Multi-Carrier Faster-Than-Nyquist Signaling.” IEEE Transactions on Vehicular Technology 75 (3): 4234–4247. https://doi.org/10.1109/TVT.2025.3608894 .

@article{hong2026joint,
  author = {Hong, Zekun and Sugiura, Shinya},
  doi = {10.1109/TVT.2025.3608894},
  journal = {IEEE Transactions on Vehicular Technology},
  number = {3},
  pages = {4234--4247},
  title = {Joint Optimization of Integrated Sensing and Communications in Precoded Multi-Carrier Faster-Than-Nyquist Signaling},
  volume = {75},
  year = {2026}
}