基于时频资源配置的低轨卫星动态跳波束技术

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中图分类号：TN919.23 文献标志码：A文章编号：1003-3114（2025）04-0698-07

doi： 10.3969/j. issn. 1003-3114.2025. 04. 005

Abstract：Lowearthorbitsatelitecommunications technologyisagoodway tosolvehighdata-ratecommunicationisues inemoteareasandofshoreareas，asmulti-beamtechniqueandfrequencyreusecanbeemployedbythelowearthorbit systemtoimprove thecapacity.However，diferentareasmayhavenon-uniforuseraccessdemands，leadingtoalimitedsystemperformancefortheaverageresourcealocatiobasedmulti-beamsystem.Taddressthisissuenthispapr，aniterativeupatebasedresourceaation schemeisproposed.Amulti-userpreamblebaseduplinktransmissionandamulti-eamdownlinktransmissonaremodeledhen，for diferentuserdemandsindiferentareas，theinfluenceof time-frequencyresourcealocationtothesystemefciencyandrateofthe beam-hoppingsystemisanalyzed，revealingtheinherentrelationshipbetweentime-frequencyresourcealocationanduserdmands. Based onthe proposed scheme，the system performance ofthelowearthorbit beam-hopping system is evaluated fromtherate mismatch，spectraleficiency，andaverageservicedelayaspects.Simulationresultshaveshownthattheproposedresourcealocation scheme is able to reduce the average service delay and improve the system effectivity.

Keywords：low earth orbit satelite；beam-hopping;dynamic resource allcation;uplink random access

0引言

低轨卫星互联网具有广覆盖的优点，可为偏远山区和沙漠区域等地面通信基础设施不足的地区提供一定的通信业务，是下一代无线移动通信解决广域通信覆盖的有效方案。（剩余9998字）