{
  "abstract": "Reconfigurable intelligent surfaces (RIS) combined with rate-splitting multiple access (RSMA) provide a promising solution for improving the spectral efficiency (SE) of sixth-generation (6G) communication systems. However, most existing studies neglect the practical coupling between the RIS phase shift and amplitude, which may cause phase-shift mismatch and significant performance loss. In this paper, we investigate the multiuser sum-rate maximization problem for practical RIS-enhanced RSMA systems considering amplitude-phase coupling. To address the resulting non-convex problem, an effective variable separation algorithm is proposed. The proposed algorithm is compatible with RIS reflecting optimization under the continuous phase shift or any amplitude-phase coupling relationship and can also be directly extended to practical RIS-enhanced NOMA and OMA systems. Simulation results demonstrate performance gain of over 190\\% compared with the ideal-RIS-based benchmark, while the proposed RSMA scheme significantly outperforms the corresponding NOMA and OMA schemes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: IEEE Internet of Things, 2026",
  "arxiv": "2610.14765",
  "author_total": 6,
  "authors": [
    {
      "name": "Qian Zhang"
    },
    {
      "name": "Xuejun Cheng"
    },
    {
      "name": "Jiaming Shi"
    },
    {
      "name": "Yufei Zhao"
    },
    {
      "name": "Rugui Yao"
    },
    {
      "name": "Ye Fan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3g6m817pprbe8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.14765",
  "fulltext_url": null,
  "id": "3g6m817pprbe8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.14765",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.IT"
    ],
    [
      "arxiv",
      "math.IT"
    ],
    [
      "openalex",
      "2208|Advanced Wireless Communication Technologies"
    ]
  ],
  "openalex": "W7221757986",
  "pdf_url": "https://arxiv.org/pdf/2610.14765",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3g6m817pprbe8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:15Z",
      "native_id": "2610.14765",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.14765"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "Sum Rate Maximization for Practical RIS-Enhanced Rate-Splitting Multiple Access Systems",
  "title_text": "Sum Rate Maximization for Practical RIS-Enhanced Rate-Splitting Multiple Access Systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:15Z",
  "url": "https://research.draconitic.com/paper/3g6m817pprbe8",
  "venue": "arXiv",
  "versions": []
}