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Channel Hardening in Massive MIMO-A Measurement Based Analysis

Gunnarsson, Sara LU ; Flordelis, Jose LU ; Van Der Perre, Liesbet LU and Tufvesson, Fredrik LU (2018) 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 2018-June.
Abstract

Wireless-controlled robots, cars and other critical applications are in need of technologies that offer high reliability and low latency. Massive MIMO, Multiple-Input Multiple-Output, is a key technology for the upcoming 5G systems and is one part of the solution to increase the reliability of wireless systems. More specifically, when increasing the number of base station antennas in a massive MIMO systems the channel variations decrease and the so-called channel hardening effect appears. This means that the variations of the channel gain in time and frequency decrease. In this paper, channel hardening in massive MIMO systems is assessed based on analysis of measurement data. For an indoor scenario, the channels are measured with a... (More)

Wireless-controlled robots, cars and other critical applications are in need of technologies that offer high reliability and low latency. Massive MIMO, Multiple-Input Multiple-Output, is a key technology for the upcoming 5G systems and is one part of the solution to increase the reliability of wireless systems. More specifically, when increasing the number of base station antennas in a massive MIMO systems the channel variations decrease and the so-called channel hardening effect appears. This means that the variations of the channel gain in time and frequency decrease. In this paper, channel hardening in massive MIMO systems is assessed based on analysis of measurement data. For an indoor scenario, the channels are measured with a 128-port cylindrical array for nine single-antenna users. The analysis shows that in a real scenario a channel hardening of 3.2-4.6 dB, measured as a reduction of the standard deviation of the channel gain, can be expected depending on the amount of user interaction. Also, some practical implications and insights are presented.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Channel hardening, massive MIMO, measurements, reliability
host publication
2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
volume
2018-June
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
conference location
Kalamata, Greece
conference dates
2018-06-25 - 2018-06-28
external identifiers
  • scopus:85053465798
ISBN
9781538635124
DOI
10.1109/SPAWC.2018.8445925
language
English
LU publication?
yes
id
9ff10313-29ea-4558-a07d-9e507f4e9cec
date added to LUP
2018-10-17 14:10:22
date last changed
2019-02-20 11:31:50
@inproceedings{9ff10313-29ea-4558-a07d-9e507f4e9cec,
  abstract     = {<p>Wireless-controlled robots, cars and other critical applications are in need of technologies that offer high reliability and low latency. Massive MIMO, Multiple-Input Multiple-Output, is a key technology for the upcoming 5G systems and is one part of the solution to increase the reliability of wireless systems. More specifically, when increasing the number of base station antennas in a massive MIMO systems the channel variations decrease and the so-called channel hardening effect appears. This means that the variations of the channel gain in time and frequency decrease. In this paper, channel hardening in massive MIMO systems is assessed based on analysis of measurement data. For an indoor scenario, the channels are measured with a 128-port cylindrical array for nine single-antenna users. The analysis shows that in a real scenario a channel hardening of 3.2-4.6 dB, measured as a reduction of the standard deviation of the channel gain, can be expected depending on the amount of user interaction. Also, some practical implications and insights are presented.</p>},
  author       = {Gunnarsson, Sara and Flordelis, Jose and Van Der Perre, Liesbet and Tufvesson, Fredrik},
  isbn         = {9781538635124},
  keyword      = {Channel hardening,massive MIMO,measurements,reliability},
  language     = {eng},
  location     = {Kalamata, Greece},
  month        = {08},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Channel Hardening in Massive MIMO-A Measurement Based Analysis},
  url          = {http://dx.doi.org/10.1109/SPAWC.2018.8445925},
  volume       = {2018-June},
  year         = {2018},
}