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Cited by 974

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Scalable Cell-Free Massive MIMO Systems

Open access
Bjornson, Emil, Sanguinetti, Luca·2020·IEEE Transactions on Communications
DOI 10.1109/tcomm.2020.2987311
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Abstract

Imagine a coverage area with many wireless access points that cooperate to jointly serve the users, instead of creating autonomous cells. Such a cell-free network operation can potentially resolve many of the interference issues that appear in current cellular networks. This ambition was previously called Network MIMO (multiple-input multiple-output) and has recently reappeared under the name Cell-Free Massive MIMO. The main challenge is to achieve the benefits of cell-free operation in a practically feasible way, with computational complexity and fronthaul requirements that are scalable to large networks with many users. We propose a new framework for scalable Cell-Free Massive MIMO systems by exploiting the dynamic cooperation cluster concept from the Network MIMO literature. We provide a novel algorithm for joint initial access, pilot assignment, and cluster formation that is proved to be scalable. Moreover, we adapt the standard channel estimation, precoding, and combining methods to become scalable. A new uplink and downlink duality is proved and used to heuristically design the precoding vectors on the basis of the combining vectors. Interestingly, the proposed scalable precoding and combining outperform conventional maximum ratio (MR) processing and also performs closely to the best unscalable alternatives.

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Metadata

Authors
Bjornson, E., & Sanguinetti, L.
Venue
IEEE Transactions on Communications
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published
2020-07
Volume
68
Issue
7
Pages
4247-4261
ISSN
  • 0090-6778 (ISSN-L)
  • 1558-0857
DOI
10.1109/tcomm.2020.2987311
OpenAlex
W2965123227
Cited by
974
References
1
FWCI
35.28
Type
journal article
Language
en
Open access
green
Licence
Funders
  • ELLIIT and the Wallenberg AI, Autonomous Systems and Software Program
  • Università di Pisa (PRA 2018-2019)
  • Research Project CONCEPT and by the Italian Ministry of Education and Research (MIUR) in the framework of the CrossLab project

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Bjornson, E., & Sanguinetti, L. (2020). Scalable Cell-Free Massive MIMO Systems. IEEE Transactions on Communications. https://doi.org/10.1109/tcomm.2020.2987311

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