Journal
IEEE COMMUNICATIONS LETTERS
Volume 21, Issue 8, Pages 1871-1874Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2017.2694431
Keywords
Cell-free massive MIMO; energy efficiency; precoding design
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Funding
- U.K. Royal Academy of Engineering Research Fellowship [RF1415\14\22]
- U.K. EPSRC [EP/P019374/1]
- EPSRC [EP/P019374/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/P019374/1] Funding Source: researchfish
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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 considering the Backhaul power consumption and the imperfect channel state information.
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