Ubiquitous Cell-Free Massive MIMO Communications

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    • Giovanni Interdonato
    • Emil Björnson
    • Hien Quoc Ngo
    • Pål Frenger
    • Erik G. Larsson

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    Since the first cellular networks were trialled in the 1970s, we have witnessed an
    incredible wireless revolution. From 1G to 4G, the massive traffic growth has
    been managed by a combination of wider bandwidths, rened radio interfaces,
    and network densication, namely increasing the number of antennas per site [1].
    Due its cost-eciency, the latter has contributed the most. Massive MIMO
    (multiple-input multiple-output) is a key 5G technology that uses massive
    antenna arrays to provide a very high beamforming gain and spatially
    multiplexing of users, and hence, increases the spectral and energy eciency
    (see [2] and references herein). It constitutes a centralized solution to densify a
    network, and its performance is limited by the inter-cell interference inherent in
    its cell-centric design. Conversely, ubiquitous cell-free Massive MIMO [3] refers to a distributed Massive MIMO system implementing coherent user-centric
    transmission to overcome the inter-cell interference limitation in cellular networks and provide additional macro-diversity. These features, combined with the system scalability inherent in the Massive MIMO design, distinguishes ubiquitous cell-free Massive MIMO from prior coordinated distributed wireless systems. In this article, we investigate the enormous potential of this promising technology while addressing practical deployment issues to deal with the increased back/front-hauling overhead deriving from the signal co-processing.

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    • Ubiquitous cell-free Massive MIMO communications

      Rights statement: Copyright 2019 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.

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    DOI

    Original languageEnglish
    Article number197
    Number of pages13
    JournalEURASIP Journal On Wireless Communications and Networking
    Journal publication date05 Aug 2019
    Volume2019
    DOIs
    Publication statusPublished - 05 Aug 2019

    ID: 178891596