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Modular Extremely Large-Scale Array Communication:Near-Field Modelling and Performance Analysis

查看全文 作　　者：Xinrui [1]Li;Haiquan [1,2]Lu;Yong [1,2]Zeng;Shi [1]Jin;Rui [3,4]Zhang 高影响力作者 机构地区：[1]National Mobile Communications Research Laboratory,Frontiers Science Center for Mobile Information Communication and Security,Southeast University,Nanjing 210096,China;[2]Purple Mountain Laboratories,Nanjing 211111,China;[3]The Chinese University of Hong Kong,Shenzhen Research Institute of Big Data,Shenzhen 518172,China;[4]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117583,Singapore高影响力机构 出　　处：《China Communications》索引2023年第20卷第4期,共21页高影响力期刊 基　　金：supported by the National Key R&D Program of China with Grant number 2019YFB1803400;the National Natural Science Foundation of China under Grant number 62071114;the Fundamental Research Funds for the Central Universities of China under grant numbers 3204002004A2 and 2242022k30005。 摘　　要：This paper investigates the wireless communication with a novel architecture of antenna arrays,termed modular extremely large-scale array(XLarray),where array elements of an extremely large number/size are regularly mounted on a shared platform with both horizontally and vertically interlaced modules.Each module consists of a moderate/flexible number of array elements with the inter-element distance typically in the order of the signal wavelength,while different modules are separated by the relatively large inter-module distance for convenience of practical deployment.By accurately modelling the signal amplitudes and phases,as well as projected apertures across all modular elements,we analyse the near-field signal-to-noise ratio(SNR)performance for modular XL-array communications.Based on the non-uniform spherical wave(NUSW)modelling,the closed-form SNR expression is derived in terms of key system parameters,such as the overall modular array size,distances of adjacent modules along all dimensions,and the user's three-dimensional(3D)location.In addition,with the number of modules in different dimensions increasing infinitely,the asymptotic SNR scaling laws are revealed.Furthermore,we show that our proposed near-field modelling and performance analysis include the results for existing array architectures/modelling as special cases,e.g.,the collocated XL-array architecture,the uniform plane wave(UPW)based far-field modelling,and the modular extremely large-scale uniform linear array(XL-ULA)of onedimension.Extensive simulation results are presented to validate our findings. 关 键 词：modular extremely large-scale array practical deployment projected apertures non-uniform spherical wave near-field modelling
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