面向复杂环境的LEO卫星终端群组定位技术

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中图分类号：TN927.2 文献标志码：A文章编号：1003-3114（2025）04-0771-09

doi：10.3969/j. issn.1003-3114.2025.04.014

Abstract：WiththeintegrationofNon-TerestrialNetworks（NTN）systmsintothe5Gevolutionand6Gstandardframeworksby 3GPPtoachieveglobal high-speed，low-latencycommunication，newlocationservicedemandshaveemerged.Existingresearchon NTN-basedpositioingmainlyfocusesonsingle-temnalsenarios.However，inpracticalapplicationssuchasmisioncodiatio disasterescue，ndscientificexpeditionteamcolaboration，thereexistmulti-terminalgroupareascomprisingateamofoperatos.In complexterrainornvironmentsaffctedbyelectromagneticinterference，thepostioningconditionsforindivualterminalswithinthe groupmaybeompromised，akinggrouppositioingetialtobainteovralcationoftheara.Grouppositioingutilsat litesignalpropagationdelymeasurementscollctedfrommuipleterminalswitintegoupforcollboratielocalzation.Sincetis scenariodifersfromsinge-terinalpositioning，traditioalpositioingmethodsstrugletoguaranteeaccuracyAgoupreapositi ningschemecombiningtheChanalgoritmwiththeiterativeoptimizationalgorithmisproposed.Thisapproachaims toovercomeheissueofederorsintheChanalgorithmcausedbyenvironmentalchanges，whichleadtoinsufcientpositioningaccuracySiulation resultsshowtattealgoricanectivelyaliethepositonginteareaofulti-teinalclusterswitherorsotexcngthe positionalaccuracyrequiredformobiltymanagement.Itguaranteesthemobilitymanagementandbeammanagementpeforanceof terminalclustersunderconditionsofGlobalNavigationSatelieystem（GNSS）sigalsunavalabityf，andprovidesanewidforthefu turedevelopment of 6G technology of satelitenetwork fusion with terrestrial network.

Keywords：NTN; terminal group; time difference of arrival;Levenberg-Marquardtalgorithm

0 引言

随着科学技术的快速发展，国内外对卫星网络的研究热潮迅速兴起，积极地探索卫星与地面网络结合，以进一步满足人们的通信需求，提高生活质量。（剩余11499字）