期刊
IEEE WIRELESS COMMUNICATIONS LETTERS
卷 6, 期 6, 页码 706-709出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2017.2734893
关键词
Massive MIMO; cell-free MIMO; user-centric approach; pilot contamination; channel estimation; rate; 5G wireless networks
Recently, the so-called cell-free (CF) massive MIMO architecture has been introduced, wherein a very large number of distributed access points simultaneously and jointly serve a much smaller number of mobile stations. This letter introduces a user-centric (UC) virtual cell approach to CF massive MIMO, wherein each user is served only by a limited number of access points. The UC approach requires less backhaul overhead than the CF approach, and outperforms the latter in terms of achievable rate- per-user for the vast majority of the users in the network.
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