Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Performance Characterization of a Real-Time Massive MIMO System with LOS Mobile Channels

Harris, Paul ; Malkowsky, Steffen LU ; Vieira, Joao LU ; Bengtsson, Erik L LU ; Tufvesson, Fredrik LU orcid ; Hasan, Wael Boukley ; Liu, Liang LU orcid ; Beach, Mark ; Armour, Simon and Edfors, Ove LU orcid (2017) In IEEE Journal on Selected Areas in Communications p.1244-1253
Abstract
The first measured results for massive multiple input, multiple-output (MIMO) performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served in real-time using a 100 antenna base Station (BS) at 3.7 GHz. When such a large number of channels dynamically change, the inherent propagation and processing delay has a critical relationship with the rate of change, as the use of outdated channel information can result in severe detection and precoding inaccuracies. For the downlink (DL) in particular, a time division duplex (TDD) configuration synonymous with massive MIMO deployments could mean only the uplink (UL) is usable in extreme cases. Therefore, it is of great interest to investigate the impact of... (More)
The first measured results for massive multiple input, multiple-output (MIMO) performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served in real-time using a 100 antenna base Station (BS) at 3.7 GHz. When such a large number of channels dynamically change, the inherent propagation and processing delay has a critical relationship with the rate of change, as the use of outdated channel information can result in severe detection and precoding inaccuracies. For the downlink (DL) in particular, a time division duplex (TDD) configuration synonymous with massive MIMO deployments could mean only the uplink (UL) is usable in extreme cases. Therefore, it is of great interest to investigate the impact of mobility on massive MIMO performance and consider ways to combat the potential limitations. In a mobile scenario with moving cars and pedestrians, the massive MIMO channel is sampled across many points in space to build a picture of the overall user orthogonality, and the impact of both azimuth and elevation array configurations are considered. Temporal analysis is also conducted for vehicles moving up to 29km�h and real-time bit error rates (BERs) for both the UL and DL without power control are presented. For a 100 antenna system, it is found that the channel state information (CSI) update rate requirement may increase by 7 times when compared to an 8 antenna system, whilst the power control update rate could be decreased by at least 5 times relative to a single antenna system. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
MIMO, Real-Time Systems, Mobile communication, Antenna Arrays, Field programmable gate arrays, Antenna measurements, Massive MIMO, 5G, Testbed, Field Trial, Mobility
in
IEEE Journal on Selected Areas in Communications
pages
10 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85020461803
  • wos:000402731600005
ISSN
0733-8716
DOI
10.1109/JSAC.2017.2686678
language
English
LU publication?
yes
id
24fd3bed-6f7b-4463-96ea-8a81fdde9b2b
date added to LUP
2017-05-18 08:33:37
date last changed
2024-03-31 09:58:14
@article{24fd3bed-6f7b-4463-96ea-8a81fdde9b2b,
  abstract     = {{The first measured results for massive multiple input, multiple-output (MIMO) performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served in real-time using a 100 antenna base Station (BS) at 3.7 GHz. When such a large number of channels dynamically change, the inherent propagation and processing delay has a critical relationship with the rate of change, as the use of outdated channel information can result in severe detection and precoding inaccuracies. For the downlink (DL) in particular, a time division duplex (TDD) configuration synonymous with massive MIMO deployments could mean only the uplink (UL) is usable in extreme cases. Therefore, it is of great interest to investigate the impact of mobility on massive MIMO performance and consider ways to combat the potential limitations. In a mobile scenario with moving cars and pedestrians, the massive MIMO channel is sampled across many points in space to build a picture of the overall user orthogonality, and the impact of both azimuth and elevation array configurations are considered. Temporal analysis is also conducted for vehicles moving up to 29km�h and real-time bit error rates (BERs) for both the UL and DL without power control are presented. For a 100 antenna system, it is found that the channel state information (CSI) update rate requirement may increase by 7 times when compared to an 8 antenna system, whilst the power control update rate could be decreased by at least 5 times relative to a single antenna system.}},
  author       = {{Harris, Paul and Malkowsky, Steffen and Vieira, Joao and Bengtsson, Erik L and Tufvesson, Fredrik and Hasan, Wael Boukley and Liu, Liang and Beach, Mark and Armour, Simon and Edfors, Ove}},
  issn         = {{0733-8716}},
  keywords     = {{MIMO; Real-Time Systems; Mobile communication; Antenna Arrays; Field programmable gate arrays; Antenna measurements; Massive MIMO; 5G; Testbed; Field Trial; Mobility}},
  language     = {{eng}},
  month        = {{04}},
  pages        = {{1244--1253}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Journal on Selected Areas in Communications}},
  title        = {{Performance Characterization of a Real-Time Massive MIMO System with LOS Mobile Channels}},
  url          = {{https://lup.lub.lu.se/search/files/25652478/JSAC_on_MaMi_Mobility.pdf}},
  doi          = {{10.1109/JSAC.2017.2686678}},
  year         = {{2017}},
}