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14 papers · 1 filter
Energy-Efficient Future Wireless Networks: A Marriage between Massive MIMO and Small Cells
Emil Björnson, Luca Sanguinetti, Marios Kountouris
How would a cellular network designed for high energy efficiency look like? To answer this fundamental question, we model cellular networks using stochastic geometry and optimize t…
Distributed Massive MIMO in Cellular Networks: Impact of Imperfect Hardware and Number of Oscillators
Emil Björnson, Michail Matthaiou, Antonios Pitarokoilis +1
Distributed massive multiple-input multiple-output (MIMO) combines the array gain of coherent MIMO processing with the proximity gains of distributed antenna setups. In this paper,…
Massive MIMO with Multi-cell MMSE Processing: Exploiting All Pilots for Interference Suppression
Xueru Li, Emil Björnson, Erik G. Larsson +2
In this paper, a new state-of-the-art multi-cell MMSE scheme is proposed for massive MIMO networks, which includes an uplink MMSE detector and a downlink MMSE precoder. The main no…
Cell-Free Massive MIMO: Uniformly Great Service For Everyone
Hien Quoc Ngo, Alexei Ashikhmin, Hong Yang +2
We consider the downlink of Cell-Free Massive MIMO systems, where a very large number of distributed access points (APs) simultaneously serve a much smaller number of users. Each A…
Designing Wireless Broadband Access for Energy Efficiency: Are Small Cells the Only Answer?
Emil Björnson, Luca Sanguinetti, Marios Kountouris
The main usage of cellular networks has changed from voice to data traffic, mostly requested by static users. In this paper, we analyze how a cellular network should be designed to…
Blind Estimation of Effective Downlink Channel Gains in Massive MIMO
Hien Quoc Ngo, Erik G. Larsson
We consider the massive MIMO downlink with time-division duplex (TDD) operation and conjugate beamforming transmission. To reliably decode the desired signals, the users need to kn…