DocumentCode :
3579443
Title :
Towards very large aperture massive MIMO: A measurement based study
Author :
Martinez, Alex Oliveras ; de Carvalho, Elisabeth ; Nielsen, Jesper Odum
Author_Institution :
Dept. of Electron. Syst., Aalborg Univ., Aalborg, Denmark
fYear :
2014
Firstpage :
281
Lastpage :
286
Abstract :
Massive MIMO is a new technique for wireless communications that claims to offer very high system throughput and energy efficiency in multi-user scenarios. The cost is to add a very large number of antennas at the base station. Theoretical research has probed these benefits, but very few measurements have showed the potential of Massive MIMO in practice. We investigate the properties of measured Massive MIMO channels in a large indoor venue. We describe a measurement campaign using 3 arrays having different shape and aperture, with 64 antennas and 8 users with 2 antennas each. We focus on the impact of the array aperture which is the main limiting factor in the degrees of freedom available in the multiple antenna channel. We find that performance is improved as the aperture increases, with an impact mostly visible in crowded scenarios where the users are closely spaced. We also test MIMO capability within a same user device with user proximity effect. We see a good channel resolvability with confirmation of the strong effect of the user hand grip. At last, we highlight that propagation conditions where line-of-sight is dominant can be favourable.
Keywords :
MIMO communication; antenna arrays; antenna radiation patterns; aperture antennas; energy conservation; multiuser channels; telecommunication power management; wireless channels; antenna array; base station; energy efficiency; high system throughput; line-of-sight propagation; multiuser scenario; user device; user hand grip; user proximity effect; very large aperture massive MIMO channel resolvability; wireless communication; Antenna arrays; Antenna measurements; Apertures; Correlation; Eigenvalues and eigenfunctions; MIMO;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Globecom Workshops (GC Wkshps), 2014
Type :
conf
DOI :
10.1109/GLOCOMW.2014.7063445
Filename :
7063445
Link To Document :
بازگشت