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Space-Constrained Massive MIMO: Hitting the Wall of Favorable Propagation

C. Masouros ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling)
Ieee Communications Letters (1089-7798). Vol. 19 (2015), 5, p. 771-774.
[Artikel, refereegranskad vetenskaplig]

The recent development of the massive multiple-input multiple-output (MIMO) paradigm, has been extensively based on the pursuit of favorable propagation: in the asymptotic limit, the channel vectors become nearly orthogonal and inter-user interference tends to zero [1]. In this context, previous studies have considered fixed inter-antenna distance, which implies an increasing array aperture as the number of elements increases. Here, we focus on a practical, space-constrained topology, where an increase in the number of antenna elements in a fixed total space imposes an inversely proportional decrease in the inter-antenna distance. Our analysis shows that, contrary to existing studies, inter-user interference does not vanish in the massive MIMO regime, thereby creating a saturation effect on the achievable rate.

Nyckelord: Antenna arrays, favorable propagation, massive MIMO

Denna post skapades 2015-06-10.
CPL Pubid: 218158


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



Chalmers infrastruktur