{
  "abstract": "This paper introduces a two-timescale antenna position optimization framework for the pinching-antenna system (PASS). The proposed framework exploits statistical channel state information (CSI) to determine large-timescale pinching-antenna (PA) positions over the entire waveguide, and utilizes instantaneous CSI to refine PA positions at the small timescale within a local region. This approach effectively captures the benefits of large-timescale PA positioning for long-term system performance and small-timescale PA movement for real-time adaptation to fast channel fluctuations. For the single-user case, we derive closed-form solutions for the optimal large-timescale PA positions, and further analyze a performance upper bound together with the conditions for achieving this bound, which guide the small-timescale position refinement. For the multi-user case, an upper bound on the minimum rate among all users is derived. To maximize their minimum rate, we develop an element-wise search algorithm for large-timescale PA positioning and a projected gradient ascent method for small-timescale position refinement. Simulation results show that the proposed scheme closely approaches the derived bounds and consistently outperforms conventional schemes by reducing path loss via large-timescale PA positioning and suppressing inter-user interference through small-timescale local movement.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.30670",
  "author_total": 4,
  "authors": [
    {
      "name": "Jingze Ding"
    },
    {
      "name": "Zijian Zhou"
    },
    {
      "name": "Bingli Jiao"
    },
    {
      "name": "Rui Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0yhwr6jt5dtfr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.30670",
  "fulltext_url": null,
  "id": "0yhwr6jt5dtfr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.30670",
  "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",
      "math.IT"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.30670",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0yhwr6jt5dtfr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:38Z",
      "native_id": "2610.30670",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.30670"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "Two-Timescale Antenna Positioning for Pinching-Antenna System Based on Statistical Channel Information",
  "title_text": "Two-Timescale Antenna Positioning for Pinching-Antenna System Based on Statistical Channel Information",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:38Z",
  "url": "https://research.draconitic.com/paper/0yhwr6jt5dtfr",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1109/tcomm.2026.3745140",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}