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Experimental Evaluation of the Performance of CoMP Systems for Closely-Located Users Including Users' Body Influence

Shekhan, Ahmad; Bin Redhwan, Sakib; Dahman, Ghassan LU ; Flordelis, Jose LU and Tufvesson, Fredrik LU (2018) 87th IEEE Vehicular Technology Conference, VTC Spring 2018 2018-June. p.1-6
Abstract

Based on multi-link synchronous propagation measurements, we study the downlink performance of Coordinated Multi-point (CoMP) systems. The propagation measurements took place in an outdoor micro-cellular environment with two base stations (BSs) located 60 m apart, each equipped with two cross-polarized co-located antennas. We focus on the challenging case of having closely-located users with 0.5 m inter- user distance. We consider four virtual users, each equipped with two antennas, moving along various routes. The patterns of the users' antennas, including the user's body influence, are measured in static scenarios with an upper body phantom and a handset mockup in the LTE 2.5-2.7 GHz band. The users' composite channel matrices are... (More)

Based on multi-link synchronous propagation measurements, we study the downlink performance of Coordinated Multi-point (CoMP) systems. The propagation measurements took place in an outdoor micro-cellular environment with two base stations (BSs) located 60 m apart, each equipped with two cross-polarized co-located antennas. We focus on the challenging case of having closely-located users with 0.5 m inter- user distance. We consider four virtual users, each equipped with two antennas, moving along various routes. The patterns of the users' antennas, including the user's body influence, are measured in static scenarios with an upper body phantom and a handset mockup in the LTE 2.5-2.7 GHz band. The users' composite channel matrices are constructed based on: 1) the propagation channel represented by the multipath components extracted from the propagation measurements and 2) the user- influenced antenna pattern. We first analyze the effect of the BS antenna polarization on the collinearity among the users' channel matrices. Then, we evaluate the effect of the BS antenna polarization on improving the system performance, where the performance is evaluated based on two criterion: the number of users that the system is able to serve in the same time-frequency resource, and the achievable sum-rate. It is found that using cross- polarized BS antenna improves the fairness and the sum-rate of the system. It is also found that, in contrast to the case of conventional co-located MIMO, the improvement gained by CoMP systems (with per-BS power control) from using cross-polarized BS antennas is mainly attributed to improving the multiplexing gain of the system while the system's effective power gain has insignificant contribution.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings
volume
2018-June
pages
6 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
87th IEEE Vehicular Technology Conference, VTC Spring 2018
conference location
Porto, Portugal
conference dates
2018-06-03 - 2018-06-06
external identifiers
  • scopus:85050986876
ISBN
9781538663554
DOI
10.1109/VTCSpring.2018.8417481
language
English
LU publication?
yes
id
3b3e74d5-5cef-425e-8655-2fbf0bd5003c
date added to LUP
2018-08-20 11:31:28
date last changed
2018-11-21 21:41:11
@inproceedings{3b3e74d5-5cef-425e-8655-2fbf0bd5003c,
  abstract     = {<p>Based on multi-link synchronous propagation measurements, we study the downlink performance of Coordinated Multi-point (CoMP) systems. The propagation measurements took place in an outdoor micro-cellular environment with two base stations (BSs) located 60 m apart, each equipped with two cross-polarized co-located antennas. We focus on the challenging case of having closely-located users with 0.5 m inter- user distance. We consider four virtual users, each equipped with two antennas, moving along various routes. The patterns of the users' antennas, including the user's body influence, are measured in static scenarios with an upper body phantom and a handset mockup in the LTE 2.5-2.7 GHz band. The users' composite channel matrices are constructed based on: 1) the propagation channel represented by the multipath components extracted from the propagation measurements and 2) the user- influenced antenna pattern. We first analyze the effect of the BS antenna polarization on the collinearity among the users' channel matrices. Then, we evaluate the effect of the BS antenna polarization on improving the system performance, where the performance is evaluated based on two criterion: the number of users that the system is able to serve in the same time-frequency resource, and the achievable sum-rate. It is found that using cross- polarized BS antenna improves the fairness and the sum-rate of the system. It is also found that, in contrast to the case of conventional co-located MIMO, the improvement gained by CoMP systems (with per-BS power control) from using cross-polarized BS antennas is mainly attributed to improving the multiplexing gain of the system while the system's effective power gain has insignificant contribution.</p>},
  author       = {Shekhan, Ahmad and Bin Redhwan, Sakib and Dahman, Ghassan and Flordelis, Jose and Tufvesson, Fredrik},
  isbn         = {9781538663554},
  language     = {eng},
  location     = {Porto, Portugal},
  month        = {07},
  pages        = {1--6},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Experimental Evaluation of the Performance of CoMP Systems for Closely-Located Users Including Users' Body Influence},
  url          = {http://dx.doi.org/10.1109/VTCSpring.2018.8417481},
  volume       = {2018-June},
  year         = {2018},
}