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Zak-OTFS with Interleaved Pilots to Extend the Region of Predictable Operation

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arxiv 2408.09379 v2 pith:URMWPHFG submitted 2024-08-18 eess.SP cs.ITmath.IT

Jinu Jayachandran , Imran Ali Khan , Saif Khan Mohammed , Ronny Hadani , Ananthanarayanan Chockalingam , Robert Calderbank This is my paper · ORCID
classification eess.SPcs.ITmath.IT
keywords carrierchanneldelaydopplerperiodpilotsinglechoose
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When the delay period of the Zak-OTFS carrier is greater than the delay spread of the channel, and the Doppler period of the carrier is greater than the Doppler spread of the channel, the effective channel filter taps can simply be read off from the response to a single pilot carrier waveform. The input-output (I/O) relation can then be reconstructed for a sampled system that operates under finite duration and bandwidth constraints. We introduce a framework for pilot design in the delay-Doppler (DD) domain which makes it possible to support users with very different delay-Doppler characteristics when it is not possible to choose a single delay and Doppler period to support all users. The method is to interleave single pilots in the DD domain, and to choose the pilot spacing so that the I/O relation can be reconstructed by solving a small linear system of equations.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Gaussian-Sinc Pulse Shaping Filter for Zak-OTFS

    cs.IT 2025-02 conditional novelty 6.0 of 10

    A Gaussian-sinc pulse shaping filter for Zak-OTFS combines sinc nulls with Gaussian sidelobe suppression and is reported to improve BER by 4 to 6 dB in simulations.

  2. Waveform for Next Generation Communication Systems: Comparing Zak-OTFS with OFDM

    eess.SP 2025-05 conditional novelty 4.0 of 10

    Zak-OTFS outperforms CP-OFDM in effective spectral efficiency for doubly-spread channels, with the largest gains (more than 2x) in high mobility plus large cell scenarios.

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