面向6G的新形态MIMO技术  

A Review of New MIMO Technologies in 6G

作　　者：王莹[1,2] 袁野 陈源彬 WANG Ying;YUAN Ye;CHEN Yuanbin(State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China;School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876 [2]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2024年第5期1-13,共13页Journal of Beijing University of Posts and Telecommunications

基　　金：北京市自然科学基金项目(4222011)。

摘　　要：旨在探讨新形态多输入多输出(MIMO)技术在面向第6代移动通信系统(6G)中的演进及其挑战。新形态MIMO技术呈现出更大阵列孔径和更密集阵列元件的趋势,涵盖超大规模MIMO、全息MIMO和超大规模智能超表面等多种形式。通过分析这些技术,研究了其在远场与近场信道建模、近场信道估计及波束赋形方案中的应用现状与进展。结果表明,随着通信频段向毫米波和太赫兹等高频段拓展,瑞利距离的扩展导致近场效应显著增加,各种新形态MIMO技术在应对这些挑战中展现出了独特优势。最后总结了新形态MIMO技术未来的研究方向及其在提升6G性能中的潜在贡献。The evolution and challenges of new forms of multiple-input and multiple-output(MIMO)technologies in the context of the sixth generation of mobile communications system(6G)are explored.Emerging MIMO technologies exhibit trends toward larger array apertures and denser array elements,encompassing forms such as ultra-large-scale MIMO,holographic MIMO,and ultra-massive intelligent metasurfaces.By analyzing these technologies,the study investigates their current applications and advancements in far-field and near-field channel modeling,near-field channel estimation and beamforming schemes.The results demonstrate that as the communication frequency band expands into higher bands such as millimeter waves and terahertz waves,the extension of the Rayleigh distance leads to significantly increased near-field effects,and various new forms of MIMO technologies have shown unique advantages in addressing these challenges.The future research directions for emerging MIMO technologies and their potential contributions to enhancing 6G performance are summarized in the conclusion.

关 键 词：新形态多输入多输出 信道建模 信道估计 波束赋形 

分 类 号：TN929.5[电子电信—通信与信息系统]