{
  "abstract": "Pinching-antenna systems (PASS) enable near-field beam focusing using radiating points along a dielectric waveguide, but coherent spherical-wave superposition makes their channels sensitive to small user displacements. This sensitivity is critical for power-domain non-orthogonal multiple access (NOMA), where successive interference cancellation (SIC) requires the weak-user layer to remain decodable at the strong user. We develop spatially robust PASS-NOMA designs that optimize antenna placement and power splitting over bounded service areas (SAs), with a preset decoding order and explicit SIC-feasibility constraints. We propose a worst-case design for quasi-static users and an ergodic design for codewords spanning representative SA positions, and characterize their achievable rate regions. Numerical results show that, despite SIC requiring weak-user decoding in both SAs, NOMA outperforms orthogonal multiple access (OMA) with a shared placement under both robustness models except when the strong user is served at low rate. In the ergodic regime, this advantage can persist even against OMA with per-user antenna reconfiguration.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: IEEE Wireless Communications Letters, Date of Publication: 30 October 2026",
  "arxiv": "2611.00847",
  "author_total": 5,
  "authors": [
    {
      "name": "Zoran Hadzi-Velkov"
    },
    {
      "name": "Slavche Pejoski"
    },
    {
      "name": "Jia Guo"
    },
    {
      "name": "Marija Poposka"
    },
    {
      "name": "Arumugam Nallanathan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1pwz4s1cfyx0j.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.00847",
  "fulltext_url": null,
  "id": "1pwz4s1cfyx0j",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.00847",
  "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",
      "eess.SP"
    ],
    [
      "arxiv",
      "math.IT"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.00847",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1pwz4s1cfyx0j.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:21:10Z",
      "native_id": "2611.00847",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.00847"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "Service-Area Robust NOMA for Pinching Antennas Systems",
  "title_text": "Service-Area Robust NOMA for Pinching Antennas Systems",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:22Z",
  "url": "https://research.draconitic.com/paper/1pwz4s1cfyx0j",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1109/lwc.2026.3748718",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}