{
  "abstract": "This paper addresses long-range sensing in bistatic low-Earth-orbit integrated sensing and communication (LEO-ISAC). Conventional OFDM sensing fails in LEO-ISAC because millisecond-scale propagation delays destroy the transmitter--receiver symbol alignment and, with multiple targets, make the receive window longer than the transmitted block. We propose a window-grid (WG) processing framework that exploits the known beam-intersection swath to resolve both problems purely at the receiver, leaving the 3GPP symbol structure unmodified: the swath delay span is folded into cyclic-prefix-sized slices, each handled by one WG. With 103.2 MHz bandwidth at bistatic ranges beyond 640 km, simulations demonstrate meter-level ranging of two targets, and 1000 Monte-Carlo trials over random target--satellite geometries show that, with an ephemeris-based satellite-selection rule, every target is detected with a 90th-percentile range error of 2.4 m.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.30653",
  "author_total": 4,
  "authors": [
    {
      "name": "Yi Geng"
    },
    {
      "name": "Xun Fan"
    },
    {
      "name": "Chenfeng Xu"
    },
    {
      "name": "Yu Zhao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ca5s7sf5fas61.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.30653",
  "fulltext_url": null,
  "id": "ca5s7sf5fas61",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.30653",
  "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",
      "2202|Radar Systems and Signal Processing"
    ]
  ],
  "openalex": "W7214668291",
  "pdf_url": "https://arxiv.org/pdf/2609.30653",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ca5s7sf5fas61.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:32Z",
      "native_id": "2609.30653",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.30653"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "3GPP-Compatible Long-Range Sensing for LEO-ISAC: A Window-Grid Processing Framework",
  "title_text": "3GPP-Compatible Long-Range Sensing for LEO-ISAC: A Window-Grid Processing Framework",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:50Z",
  "url": "https://research.draconitic.com/paper/ca5s7sf5fas61",
  "venue": "arXiv",
  "versions": []
}