On the Total Energy Efficiency of Cell-Free Massive MIMO

• Published in: IEEE transactions on green communications and networking Vol. 2; no. 1; pp. 25 - 39
• Main Authors: Ngo, Hien Quoc, Tran, Le-Nam, Duong, Trung Q., Matthaiou, Michail, Larsson, Erik G.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.03.2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; antenna arrays; Antennas; AP selection schemes; array signal processing; backhaul power consumption; Beamforming; Cell-free massive MIMO; cell-free massive multiple input multiple output downlink; Channel estimation; channel estimation errors; Closed form solutions; closed-form expression; Communication channels; conjugate beamforming; conjugate beamforming scheme; distributed multiple-antenna access points; Downlink; Duplex operation; energy conservation; Energy efficiency; Exact solutions; massive MIMO; Mathematical analysis; MIMO; MIMO (control systems); MIMO communication; network MIMO; optimal power allocation algorithm; Optimization; per-AP power constraint; per-user spectral efficiency constraint; power allocation scheme; Power consumption; Power control; Power demand; Power efficiency; Power management; quality of service; single-antenna users; spectral efficiency; telecommunication power management; time-division duplex operation; total energy efficiency; Uplink; wireless channels

We consider the cell-free massive multiple-input multiple-output (MIMO) downlink, where a very large number of distributed multiple-antenna access points (APs) serve many single-antenna users in the same time-frequency resource. A simple (distributed) conjugate beamforming scheme is applied at each...