面向物联网的模块化XL-MIMO近远场NOMA通信的波束赋形设计

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中图分类号：TN929.5 文献标志码：A 文章编号：1001-3695（2026）04-025-1180-08

doi：10.19734/j. issn.1001-3695.2025.09.0306

Beamforming design in modular XL-MIMO-enabled hybrid near-far mixed field NOMA communication systems for Internet of Things

LiangYisheng，XieZhili，ZhangGuangchi ，CuiMiao，FuHao （Schoolof Information Engineering，Guangdong Universityof Technology，Guangzhou 51Oo6，China）

Abstract：The Internet of Things （IoT）communication systems face severe challenges of limited spectrum resources and multi-node interference，whichdegradeoverall systemperformance.ModularXL-MMO technology enhanced spatialresolution throughalargerarryaperture，whileNOMAimprovesspectraleficiencyviapower-domainmultiplexing.Itconsideredcombiningbothapproachesanefective solution tothesechallenges.However，inXL-MIMOsystems，thecoexistenceof near-field sphericalandfar-fieldplanarwavepropagationleads tohighlynon-uniformspatialchannelcorelation，exacerbating inte-ode interference.This workconsideredamodular XL-MIMO near-fieldandfar-field NOMA downlink communicationsystem.To mitigate interferenceand enhancecommunicationperformanceunder minimumrateconstraints fornear-fieldand far-field nodes，itinvestigatedabeamformingdesign.Thispaperproposedasum-ratemaximizationalgorithmfornetworkodesundera totaltransmitpowerconstraint.Toreduceoptimizationcomplexity，itfurtherdevelopedasimplifiedbeamformingdesignleveragingthepower-domainmultiplexing featureof NOMA.Simulationresultsdemonstrate thattheproposedalgorithmachievesa significantlyhigher network sum-ratethanexistingbaselineschemes.Theresultsalsoindicatethatnear-fieldandfar-field NOMA fectivelycoodinateschanneldisparitiesbetweennear-fieldandfar-fieldregions，improvingspectral eficiencywhile ensuring node fairness.

Keywords：Internet-of-Things（IoT）；extremelylarge-scalemultiple-inputmultiple-output（XL-MIMO）；modular；non orthogonal multiple access （NOMA）；beamforming

0引言

随着第五代移动通信（5G）时代的发展，物联网（InternetofThings，IoT）设备的快速发展和应用层出不穷，使得系统面临频谱资源受限与容量需求激增的双重挑战。（剩余16006字）