{
  "abstract": "This paper analyzes the ergodic rate of a wideband reconfigurable intelligent surface (RIS)-assisted terahertz link under beam squint and finite-resolution phase control. Independent Rayleigh fading on the two RIS-assisted hops produces double-Rayleigh cascaded amplitudes. Exact second- and fourth-order channel moments are derived by incorporating the frequency-dependent array response and phase-quantization errors. Moment matching then provides a Gamma approximation for the received power on each subcarrier and a tractable closed-form approximation for the wideband ergodic rate. A first-null bandwidth approximation characterizes the aperture--bandwidth limitation of frequency-flat RIS control. Monte Carlo simulations validate the analytical framework.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.14037",
  "author_total": 4,
  "authors": [
    {
      "name": "Waqas Khalid"
    },
    {
      "name": "Chiew Foong Kwong"
    },
    {
      "name": "David Chieng"
    },
    {
      "name": "Qianyu Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d99edr97bfw5f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.14037",
  "fulltext_url": null,
  "id": "d99edr97bfw5f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.14037",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.IT"
    ],
    [
      "arxiv",
      "cs.NI"
    ],
    [
      "arxiv",
      "math.IT"
    ],
    [
      "openalex",
      "2208|Advanced Wireless Communication Technologies"
    ]
  ],
  "openalex": "W7213270459",
  "pdf_url": "https://arxiv.org/pdf/2609.14037",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d99edr97bfw5f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:29Z",
      "native_id": "2609.14037",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.14037"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "Beam Squint and Aperture--Bandwidth Limitations in Wideband RIS-Assisted THz Links",
  "title_text": "Beam Squint and Aperture--Bandwidth Limitations in Wideband RIS-Assisted THz Links",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:29Z",
  "url": "https://research.draconitic.com/paper/d99edr97bfw5f",
  "venue": "arXiv",
  "versions": []
}