Advanced

Spatial Separation of Closely-Spaced Users in Measured Massive Multi-User MIMO Channels

Flordelis, Jose LU ; Gao, Xiang LU ; Dahman, Ghassan LU ; Rusek, Fredrik LU ; Edfors, Ove LU and Tufvesson, Fredrik LU (2015) IEEE International Conference on Communications, ICC 2015 In 2015 IEEE International Conference on Communications (ICC) p.1441-1446
Abstract
Fully-synchronous measurements of a massive multi-user multiple-input multiple-output (MU-MIMO) radio propagation channel are presented. We evaluate the ability of a massive MIMO system to spatially separate users located close to each other in line-of-sight (LOS) propagation conditions. The system consists of a base-station (BS) antenna array equipped with 64 dual-polarized antenna elements (128 ports) arranged

in a cylindrical configuration, and eight single-antenna users. The users are confined to a five-meter diameter circle and move randomly at pedestrian speeds. The BS antenna array is located on top of a 20 m tall building and has LOS to the users. We examine user separability by studying singular value spread

of... (More)
Fully-synchronous measurements of a massive multi-user multiple-input multiple-output (MU-MIMO) radio propagation channel are presented. We evaluate the ability of a massive MIMO system to spatially separate users located close to each other in line-of-sight (LOS) propagation conditions. The system consists of a base-station (BS) antenna array equipped with 64 dual-polarized antenna elements (128 ports) arranged

in a cylindrical configuration, and eight single-antenna users. The users are confined to a five-meter diameter circle and move randomly at pedestrian speeds. The BS antenna array is located on top of a 20 m tall building and has LOS to the users. We examine user separability by studying singular value spread

of the MU-MIMO channel matrix for several subsets of BS antenna array ports, along with sum-rate capacity and achievable sum-rates with both zero-forcing and matched-filtering linear precoders. We also analyze the performance of the user with the lowest rate. Finally, a comparison between the performance offered by the massive MIMO system and that of a conventional MU-MIMO system is provided. To the best of our knowledge, this is the first report of fully-synchronous dynamic measurements of a massive MIMO system. Our investigation shows that even users located close to each other in LOS propagation conditions can be spatially separated in a massive MIMO system. (Less)
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
multi-user multiple-input multiple-output systems, MU-MIMO, massive MIMO, large-scale MIMO, MIMO channel measurements, spatial separation, singular value spread, sum-rate capacity, sum-rate, linear precoder
in
2015 IEEE International Conference on Communications (ICC)
pages
1441 - 1446
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Conference on Communications, ICC 2015
external identifiers
  • Scopus:84953717299
language
English
LU publication?
yes
id
c2853508-a976-4cb8-b25d-1f37ad514e86 (old id 5154187)
date added to LUP
2015-03-31 11:12:47
date last changed
2016-10-13 04:51:09
@misc{c2853508-a976-4cb8-b25d-1f37ad514e86,
  abstract     = {Fully-synchronous measurements of a massive multi-user multiple-input multiple-output (MU-MIMO) radio propagation channel are presented. We evaluate the ability of a massive MIMO system to spatially separate users located close to each other in line-of-sight (LOS) propagation conditions. The system consists of a base-station (BS) antenna array equipped with 64 dual-polarized antenna elements (128 ports) arranged<br/><br>
in a cylindrical configuration, and eight single-antenna users. The users are confined to a five-meter diameter circle and move randomly at pedestrian speeds. The BS antenna array is located on top of a 20 m tall building and has LOS to the users. We examine user separability by studying singular value spread<br/><br>
of the MU-MIMO channel matrix for several subsets of BS antenna array ports, along with sum-rate capacity and achievable sum-rates with both zero-forcing and matched-filtering linear precoders. We also analyze the performance of the user with the lowest rate. Finally, a comparison between the performance offered by the massive MIMO system and that of a conventional MU-MIMO system is provided. To the best of our knowledge, this is the first report of fully-synchronous dynamic measurements of a massive MIMO system. Our investigation shows that even users located close to each other in LOS propagation conditions can be spatially separated in a massive MIMO system.},
  author       = {Flordelis, Jose and Gao, Xiang and Dahman, Ghassan and Rusek, Fredrik and Edfors, Ove and Tufvesson, Fredrik},
  keyword      = {multi-user multiple-input multiple-output systems,MU-MIMO,massive MIMO,large-scale MIMO,MIMO channel measurements,spatial separation,singular value spread,sum-rate capacity,sum-rate,linear precoder},
  language     = {eng},
  pages        = {1441--1446},
  publisher    = {ARRAY(0x9c17828)},
  series       = {2015 IEEE International Conference on Communications (ICC)},
  title        = {Spatial Separation of Closely-Spaced Users in Measured Massive Multi-User MIMO Channels},
  year         = {2015},
}