{"ID":6537467,"CreatedAt":"2026-07-14T02:54:43.516908796Z","UpdatedAt":"2026-07-15T03:28:55.185153975Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2607.11602","arxiv_id":"2607.11602","title":"Spatial and Temporal Correlation of Interference in a Narrow Multibeam LEO Satellite Random Access Network","abstract":"Interference is a limiting factor in the emerging dense low Earth orbit (LEO) networks. In the LEO network, the interference is spatially and temporally correlated. At narrow-beam LEO base stations (BSs), spatial interference can vary significantly, and multipath fading introduces temporal variation. While developing novel stochastic geometry analysis in a multibeam scenario, we explore spatio-temporal interference correlation in the LEO uplink. We derive a closed-form expression for the spatio-temporal interference correlation coefficient. As an application of the analysis, we show that the signal-to-interference ratio (SIR) entails significant spatial clustering, which is especially prevalent if the beams are near-Gaussian, i.e., have weak side lobes and/or the side lobe interference/inter-cell interference is small, and large cell sizes. In this regard, we demonstrate that an appropriately designed grant-free random access scheme, particularly slotted ALOHA, can mitigate spatial SIR clustering over the beams while preserving average throughput. Furthermore, we propose a novel gamma distribution model for the interference power distribution and a Lomax distribution model for the SIR.","short_abstract":"Interference is a limiting factor in the emerging dense low Earth orbit (LEO) networks. In the LEO network, the interference is spatially and temporally correlated. At narrow-beam LEO base stations (BSs), spatial interference can vary significantly, and multipath fading introduces temporal variation. While developing n...","url_abs":"https://arxiv.org/abs/2607.11602","url_pdf":"https://arxiv.org/pdf/2607.11602v1","authors":"[\"Ilari Angervuori\",\"Abid Afridi\",\"Risto Wichman\"]","published":"2026-07-13T14:26:33Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}