2015 · 227 citations · 13 references
EngineeringComputer EngineeringElectrical EngineeringAntennasOptimizationWireless CommunicationsBeamformingMassive Multiple-input Multiple-outputMobile NetworksPower OptimizationWireless Channel ModelingWireless NetworksCell-free Massive MimoSmall Cell Networks
Cell‑Free Massive MIMO systems consist of many distributed, low‑cost, low‑power access‑point antennas connected to a network controller, with far more antennas than users, and serve each user simultaneously without cell partitioning. The paper defines cell‑free systems and analyzes algorithms for power optimization and linear precoding. The authors analyze power‑optimization algorithms and linear precoding techniques for these systems. Compared with the conventional small‑cell scheme, Cell‑Free Massive MIMO can yield more than ten‑fold improvement in terms of 5%-outage rate.
Cell-Free Massive MIMO systems comprise a large number of distributed, low cost, and low power access point antennas, connected to a network controller. The number of antennas is significantly larger than the number of users. The system is not partitioned into cells and each user is served by all access point antennas simultaneously. In this paper, we define cell-free systems and analyze algorithms for power optimization and linear pre-coding. Compared with the conventional small-cell scheme, Cell-Free Massive MIMO can yield more than ten-fold improvement in terms of 5%-outage rate.
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Scaling up MIMO: Opportunities and challenges with very large arrays
2013 · 4.3K citations
Five disruptive technology directions for 5G
Federico Boccardi, Robert W. Heath, Angel Lozano et al. · IEEE Communications Magazine · 2014 · 3.8K citations · Full text
Computing, Electrical Engineering, Information Technology +17