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Massive MIMO systems with hardware-constrained base stations

E. Björnson ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling) ; M. Debbah
2014 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2014; Florence; Italy; 4 May 2014 through 9 May 2014 (1520-6149). p. 3142-3146. (2014)
[Konferensbidrag, refereegranskat]

Massive multiple-input multiple-output (MIMO) systems are cellular networks where the base stations (BSs) are equipped with unconventionally many antennas. Such large antenna arrays offer huge spatial degrees-of-freedom for transmission optimization; in particular, great signal gains, resilience to imperfect channel knowledge, and small inter-user interference are all achievable without extensive inter-cell coordination. The key to cost-efficient deployment of large arrays is the use of hardware-constrained base stations with low-cost antenna elements, as compared to today's expensive and power-hungry BSs. Low-cost transceivers are prone to hardware imperfections, but it has been conjectured that the excessive degrees-of-freedom of massive MIMO would bring robustness to such imperfections. We herein prove this claim for an uplink channel with multiplicative phase-drift, additive distortion noise, and noise amplification. Specifically, we derive a closed-form scaling law that shows how fast the imperfections increase with the number of antennas.

Nyckelord: Achievable uplink rates , channel estimation , massive MIMO , scaling laws , transceiver hardware imperfections


Article number 6854179



Denna post skapades 2014-08-22.
CPL Pubid: 201839

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling (1900-2017)

Ämnesområden

Signalbehandling

Chalmers infrastruktur