Time-Frequency Pilot Sequence Design and LoS Delay-Doppler Estimation
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914504690892800 |
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| author | Devanand, Aadarsh Mankar, Praful D. |
| author_facet | Devanand, Aadarsh Mankar, Praful D. |
| contents | We present a novel framework for line-of-sight (LoS) delay-Doppler (DD) estimation in dense scattering propagation environments. We present two time-frequency (TF) domain pilot sequences inspired by the Zadoff-Chu sequence that exhibit desirable autocorrelation properties. Further, we present a twisted convolution-based approach for LoS DD estimation directly from the TF-domain received signal, avoiding an additional TF to DD transformation, which is commonly found in literature. Numerical results from simulations demonstrate that the proposed framework significantly outperforms traditional single-carrier Zadoff-Chu sequences in both delay and Doppler estimation over a wide range of Rician fading factor and SNR values. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_22478 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Time-Frequency Pilot Sequence Design and LoS Delay-Doppler Estimation Devanand, Aadarsh Mankar, Praful D. Signal Processing We present a novel framework for line-of-sight (LoS) delay-Doppler (DD) estimation in dense scattering propagation environments. We present two time-frequency (TF) domain pilot sequences inspired by the Zadoff-Chu sequence that exhibit desirable autocorrelation properties. Further, we present a twisted convolution-based approach for LoS DD estimation directly from the TF-domain received signal, avoiding an additional TF to DD transformation, which is commonly found in literature. Numerical results from simulations demonstrate that the proposed framework significantly outperforms traditional single-carrier Zadoff-Chu sequences in both delay and Doppler estimation over a wide range of Rician fading factor and SNR values. |
| title | Time-Frequency Pilot Sequence Design and LoS Delay-Doppler Estimation |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2604.22478 |