Cell-Free Massive MIMO for 6G Wireless Communication Networks

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

46 Scopus Citations
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Author(s)

  • Hengtao He
  • Xianghao Yu
  • Jun Zhang
  • Shenghui Song
  • Khaled B. Letaief

Detail(s)

Original languageEnglish
Pages (from-to)321-335
Journal / PublicationJournal of Communications and Information Networks
Volume6
Issue number4
Online published24 Dec 2021
Publication statusPublished - Dec 2021
Externally publishedYes

Abstract

The recently commercialized fifth-generation (5G) wireless networks have achieved many improvements, including air interface enhancement, spectrum expansion, and network intensification by several key technologies, such as massive multiple-input multiple-output (MIMO), millimeter-wave communications, and ultra-dense networking. Despite the deployment of 5G commercial systems, wireless communications is still fac-ing many challenges to enable connected intelligence and a myriad of applications such as industrial Internet-of-things, autonomous systems, brain-computer interfaces, digital twin, tactile Internet, etc. Therefore, it is urgent to start research on the sixth-generation (6G) wireless communication systems. Among the candidate technologies for 6G, cell-free massive MIMO, which combines the advantages of distributed systems and massive MIMO, is a promising solution to enhance the wireless transmission efficiency and provide better coverage. In this paper, we present a comprehensive study on cell-free massive MIMO for 6G wireless communication networks with a special focus on the signal processing perspective. Specifically, we introduce enabling physical layer technologies for cell-free massive MIMO, such as user association, pilot assignment, transmitter, and receiver design, as well as power control and allocation. Furthermore, some current and future research problems are described.

Research Area(s)

  • 6G network, cell-free massive MIMO, distributed antenna systems, massive MIMO, user-centric

Citation Format(s)

Cell-Free Massive MIMO for 6G Wireless Communication Networks. / He, Hengtao; Yu, Xianghao; Zhang, Jun et al.
In: Journal of Communications and Information Networks, Vol. 6, No. 4, 12.2021, p. 321-335.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review