Towards Near-Field Communications for 6G:Challenges and Opportunities

作     者：LIU Mengyu ZHANG Yang JIN Yasheng ZHI Kangda PAN Cunhua LIU Mengyu;ZHANG Yang;JIN Yasheng;ZHI Kangda;PAN Cunhua

作者机构：Southeast UniversityNanjing 210096China Queen Mary University of LondonLondon E14NSUK 

出 版 物：《ZTE Communications》 (中兴通讯技术（英文版）)

年 卷 期：2024年第22卷第1期

页      面：3-15页

学科分类：11[军事学] 1105[军事学-军队指挥学] 0839[工学-网络空间安全] 08[工学] 110505[军事学-密码学] 110503[军事学-军事通信学] 

基　　金：supported in part by National Key Research and Develop⁃ment Young Scientist Project 2023YFB2905100 the National Natural Sci⁃ence Foundation of China under Grant Nos.62201137 and 62331023 the Fundamental Research Funds for the Central Universities under Grant No.2242022k60001 the Research Fund of National Mobile Communications Research Laboratory,Southeast University,China under Grant No.2023A03 

主　　题：near-field communications extremely large-scale antenna arrays spatial non-stationarity beam training localization 

摘      要：Extremely large-scale multiple-input multiple-output(XL-MIMO)and terahertz(THz)communications are pivotal candidate technologies for supporting the development of 6G mobile ***,these techniques invalidate the common assumptions of far-field plane waves and introduce many new *** accurately understand the performance of these new techniques,spherical wave modeling of near-field communications needs to be applied for future ***,the investigation of near-field communication holds significant importance for the advancement of 6G,which brings many new and open research challenges in contrast to conventional far-field *** this paper,we first formulate a general model of the near-field channel and discuss the influence of spatial nonstationary properties on the near-field channel ***,we discuss the challenges encountered in the near field in terms of beam training,localization,and transmission scheme design,***,we point out some promising research directions for near-field communications.