Cell-Free Massive MIMO: User-Centric Approach

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 MIM...

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Bibliographic Details
Published inIEEE wireless communications letters Vol. 6; no. 6; pp. 706 - 709
Main Authors Buzzi, Stefano, D'Andrea, Carmen
Format Journal Article
LanguageEnglish
Published IEEE 01.12.2017
Subjects
5G wireless networks
Array signal processing
cell-free MIMO
Channel estimation
Computer architecture
Data communication
Downlink
Massive MIMO
MIMO
pilot contamination
rate
Uplink
user-centric approach
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Summary: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.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2017.2734893