Energy Efficiency in Cell-Free Massive MIMO with Zero-Forcing Precoding Design

Long D. Nguyen, Quang Duong, Hien Q. Ngo, Kamel Tourki

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


We consider the downlink of a cell-free massive multiple-input multiple-output (MIMO) network where numerous distributed access points (APs) serve a smaller number of users under time division duplex operation. An important issue in deploying cell-free networks is high power consumption, which is proportional to the number of APs. This issue has raised the question as to their suitability for green communications in terms of the total energy efficiency (bits/Joule). To tackle this, we develop a novel low-complexity power control technique with zero-forcing precoding design to maximize the energy efficiency of cell-free massive MIMO taking into account the backhaul power consumption and the imperfect channel state information.
Original languageEnglish
Pages (from-to)1871-1874
Number of pages4
JournalIEEE Communications Letters
Issue number8
Early online date14 Apr 2017
Publication statusPublished - Aug 2017


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