On Ergodic Rates and Optimal Array Geometry in Line-of-Sight Massive MIMO
2016 (English)Conference paper, Poster (Refereed)
We investigate the achievable ergodic rate of Massive multi-input-multi-output (MIMO) system in environments with high mobility and line-of-sight (LoS). A 3-dimensional geometric model with uniform rectangular array at the basestation (BS) is used for the investigation. We derive a closed formexpression for a lower bound on the uplink ergodic rate takinginto account imperfections of the channel state information,number of BS antennas, antenna spacing, and spatial distributionof user terminals. The results show that, in LoS Massive MIMO, when the terminals are spherically uniformly distributed around the BS, the ergodic rate is maximized for antenna spacing equal to integer multiples of one-half wavelength.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:liu:diva-129714OAI: oai:DiVA.org:liu-129714DiVA: diva2:942550
SPAWC 2016. The 17th IEEE International workshop on Signal Processing advances in Wireless Communications July 3rd-July 6th, Edinburgh, UK