Cell-Free Massive MIMO for 6G Wireless Communication Networks
Cell-Free Massive MIMO for 6G Wireless Communication Networks
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Xianghao Yu,Khaled B. Letaief,Hengtao He,Jun Zhang,S. H. Song.Cell-Free Massive MIMO for 6G Wireless Communication Networks[EB/OL].(2021-10-14)[2025-09-24].https://arxiv.org/abs/2110.07309.点此复制
The recently commercialized fifth-generation (5G) wireless communication
networks 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 facing 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 such systems, cell-free massive MIMO which combines the
advantages of distributed systems and massive MIMO is considered as a key
solution to enhance the wireless transmission efficiency and becomes the
international frontier. In this paper, we present a comprehensive study on
cell-free massive MIMO for 6G wireless communication networks, especially from
the signal processing perspective. We focus on 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
highlighted.
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