Metraipolis › archive › dc_bec47474288e

Channel Estimation for OTFS Systems With Overspread Doppler Shifts — arXiv:2608.12524

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.12524
License (as archived): CC0-1.0
Archived: 2026-10-19T04:54:30.311Z
SHA-256 of the archived text: 10d41450a0e8882f68925bf997ef5fc3ea6289b2aca4be25beb18123446a58f9
Stable URL of this page: https://metraipolis.com/documento/dc_bec47474288e

How to cite

Channel Estimation for OTFS Systems With Overspread Doppler Shifts — arXiv:2608.12524 — arXiv (en), https://arxiv.org/abs/2608.12524 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_bec47474288e (Metraipolis archive dc_bec47474288e, sha256 10d41450a0e8882f68925bf997ef5fc3ea6289b2aca4be25beb18123446a58f9)

BibTeX

@misc{dcbec47474288e,
  title = {Channel Estimation for OTFS Systems With Overspread Doppler Shifts — arXiv:2608.12524},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.12524},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_bec47474288e; sha256 10d41450a0e8882f68925bf997ef5fc3ea6289b2aca4be25beb18123446a58f9},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.12524. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

In this paper, we consider an orthogonal time frequency space (OTFS) system in time-varying channels with overspread Doppler shifts, typically found in non-terrestrial multi-satellite links. The overspread Doppler shifts with magnitude greater than half of the subcarrier spacing, result in aliased Doppler shifts in the delay-Doppler (DD) domain due to the OTFS modulo operation. This makes channel estimation very challenging and the traditional channel estimation methods become ineffective. To address this challenge, we propose a DD training frame and a two-stage channel estimation method. The training frame comprises a cosine pilot signal and a pilot symbol. In the first stage of the channel estimation, the pilot symbol in the DD domain is utilized to estimate the delays, aliased Doppler shifts, and channel gains of the propagation paths. In the second stage, the received time domain signal is converted into the frequency domain to detect the peaks of all the Doppler shifts using the cosine pilot signal. Then, we present a threshold-based method to pair the estimated actual Doppler shifts with their corresponding delays and channel gains. The complexity of the proposed channel estimation is also discussed. Finally, the performance of the proposed channel estimation is validated in terms of the normalized mean square error (NMSE) and bit error rate (BER) in various scenarios.

Tema degli esploratori: matematica e informatica teorica (retro-catalogo arXiv: annunci del 2026-08-14 in math.IT).
Categorie arXiv: Information Theory (cs.IT) ; Emerging Technologies (cs.ET).
Pagina del lavoro: https://arxiv.org/abs/2608.12524 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-19T04:45:19.660Z dalla pagina https://arxiv.org/catchup/math.IT/2026-08-14?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).