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Full-Wave-Calibrated Element-Wise RIS Modeling With Cross-Aperture Coefficient Transfer for Multipath Channel Prediction — arXiv:2609.15173

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.15173
License (as archived): CC0-1.0
Archived: 2026-10-16T02:58:03.639Z
SHA-256 of the archived text: 70056a278abe8c157389edcf631004d6460dc5461c41aab1c64898c3d565153b
Stable URL of this page: https://metraipolis.com/documento/dc_7745337bd6fa

How to cite

Full-Wave-Calibrated Element-Wise RIS Modeling With Cross-Aperture Coefficient Transfer for Multipath Channel Prediction — arXiv:2609.15173 — arXiv (en), https://arxiv.org/abs/2609.15173 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_7745337bd6fa (Metraipolis archive dc_7745337bd6fa, sha256 70056a278abe8c157389edcf631004d6460dc5461c41aab1c64898c3d565153b)

BibTeX

@misc{dc7745337bd6fa,
  title = {Full-Wave-Calibrated Element-Wise RIS Modeling With Cross-Aperture Coefficient Transfer for Multipath Channel Prediction — arXiv:2609.15173},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.15173},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_7745337bd6fa; sha256 70056a278abe8c157389edcf631004d6460dc5461c41aab1c64898c3d565153b},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.15173. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Practical reconfigurable intelligent surfaces (RISs) can exhibit deterministic parasitic scattering that is not captured by idealized element-wise models. As a result, such models may overestimate the gain of the intended RIS-assisted path and bias multipath prediction. This paper develops a full-wave-calibrated element-wise model using three Bragg-order basis functions to represent the intended and dominant parasitic scattering components. Environmental multipath is incorporated by identifying RIS--Rx reflection sequences with ray tracing (RT) and unfolding them by image theory into path-dependent image points. This allows direct and reflected RIS-assisted paths to be evaluated using the same per-element kernel and coherently combined with Tx--Rx bypass paths. To reduce the full-wave calibration burden for large RISs under a prescribed focusing configuration, only the three Bragg-order coefficients are transferred from a 25-by-25 calibration aperture, while the target-aperture basis functions and geometry are recomputed. At 154 GHz, the transferred coefficients keep the intended-order errors within 0.8 dB for the 50-by-50 and 100-by-100 RISs, while reducing the full-wave calibration time for the prescribed configuration from 7.56 to 1.08 h relative to direct 100-by-100 calibration. For multipath validation with the 50-by-50 RIS, the calibrated model using the same transferred coefficients keeps the nominal-Rx gain error within 0.88 dB across four PEC reflector configurations, compared with 1.75--5.51 dB for the uncalibrated general model, and reduces the error from 6.49 to 0.23 dB in the scaled indoor environment.

Tema degli esploratori: calcolo e infrastrutture (retro-catalogo arXiv: annunci del 2026-09-15 in eess.SY).
Categorie arXiv: Signal Processing (eess.SP) ; Systems and Control (eess.SY).
Pagina del lavoro: https://arxiv.org/abs/2609.15173 — 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 2026-10-16T02:45:08.561Z dalla pagina https://arxiv.org/catchup/eess.SY/2026-09-15?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).