北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2024, Vol. 47 ›› Issue (5): 1-13.

• 综述 •    下一篇

面向6G的新形态MIMO技术综述

王莹1,袁野2,陈源彬3   

  1. 1. 北京邮电大学网络与交换国家重点实验室
    2. 北京邮电大学信息与通信工程学院
    3. 北京邮电大学
  • 收稿日期:2024-04-14 修回日期:2024-06-13 出版日期:2024-10-28 发布日期:2024-11-10
  • 通讯作者: 王莹 E-mail:wangying@bupt.edu.cn

A Review of New-Modal MIMO Technologies in 6G

Ying WANG1,Ye YUAN2,Yuanbin Chen1   

  1. 1.
    2. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications
  • Received:2024-04-14 Revised:2024-06-13 Online:2024-10-28 Published:2024-11-10
  • Contact: Ying WANG E-mail:wangying@bupt.edu.cn

摘要: MIMO技术的不断演进呈现出阵列孔径尺寸更大与阵列元件排列更密集特性,衍生出诸如超大规模MIMO、全息MIMO与超大规模智能超表面等技术,统称为新形态MIMO。随着6G移动通信迈向毫米波、太赫兹等更高频段,新形态MIMO的双重演进特性使得瑞利距离显著扩张,导致近场因素不容忽视。针对不同种类新形态MIMO,从远场与近场信道建模、近场信道估计与波束赋型方案展开研究综述,介绍各种方案技术特点。最后,探讨新形态MIMO的未来研究方向,展示新形态MIMO技术增强6G移动通信系统性能的潜力。

关键词: 新形态MIMO, 信道建模, 信道估计, 波束赋型

Abstract: The advancement of multiple-input multiple-output (MIMO) technologies results in larger array apertures and more densely packed array elements. This progress has spurred the development of novel technologies like extremely large-scale MIMO, holographic MIMO, and extremely large-scale reconfigurable intelligent surfaces, collectively known as the new-modal MIMO. As the sixth generation of the mobile communi-cation system (6G) moves towards a higher frequency spectrum, including millimeter waves and terahertz, the double evolutions of new-modal MIMO substantially increase the Rayleigh distance, resulting in nonnegligible considerations of near-field communications. This article investigates far-field and near-field channel modeling, estimation, and beamforming techniques tailored for different paradigms of new-modal MIMO, highlighting their technical details and new characteristics. Finally, prospective research directions are discussed for new-modal MIMO, demonstrating its beneficial potential to enhance 6G mobile com-munication systems.

Key words: New-modal MIMO, channel modeling, channel estimation, beamforming

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