Measured adaptive matching performance of a MIMO terminal with user effects
(2013) In IEEE Antennas and Wireless Propagation Letters 12. p.1720-1723- Abstract
- Absorption and impedance mismatch due to the proximity of a user as well as certain propagation channel characteristics can severely degrade the multiple-input multiple-output (MIMO) performance of multi-antenna terminals in real usage scenarios. In this context, we investigated the potential of adaptive impedance matching (AIM) to mitigate performance degradation from these effects based on channel measurements involving a terminal prototype in three user scenarios and two propagation environments. First, optimal AIM state for the terminal in a given user-channel setup was found by post-processing the measured channels. The optimal state was then experimentally verified with two Maury Microwave mechanical tuners. The results show that by... (More)
- Absorption and impedance mismatch due to the proximity of a user as well as certain propagation channel characteristics can severely degrade the multiple-input multiple-output (MIMO) performance of multi-antenna terminals in real usage scenarios. In this context, we investigated the potential of adaptive impedance matching (AIM) to mitigate performance degradation from these effects based on channel measurements involving a terminal prototype in three user scenarios and two propagation environments. First, optimal AIM state for the terminal in a given user-channel setup was found by post-processing the measured channels. The optimal state was then experimentally verified with two Maury Microwave mechanical tuners. The results show that by employing AIM instead of 50Ω termination, the average capacity is increased by up to 25%. Moreover, the observed capacity gains can be partly explained by physical mechanisms underlying the propagation conditions. Furthermore, the achieved gains with real tuners are only marginally affected by the tuners’ actual insertion losses, estimated to be 0.1-0.7 dB. Therefore, we conclude that AIM can be a viable solution to enhance MIMO terminal performance. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4251198
- author
- Vasilev, Ivaylo LU ; Plicanic, Vanja LU ; Tian, Ruiyuan LU and Lau, Buon Kiong LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- IEEE Antennas and Wireless Propagation Letters
- volume
- 12
- pages
- 1720 - 1723
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000331301600014
- scopus:84894188419
- ISSN
- 1548-5757
- DOI
- 10.1109/LAWP.2013.2295681
- project
- EIT_ANTCHN Antenna-Channel Harmonization for Throughput Enhancement in Advanced Mobile Terminals
- EIT_Optantsys Novel Antenna System Design Paradigm for High Performance Mobile Communications
- language
- English
- LU publication?
- yes
- id
- 7a3647cf-ba4e-4d0a-9a87-f41f501b93e5 (old id 4251198)
- alternative location
- http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=06690187
- date added to LUP
- 2016-04-01 10:55:54
- date last changed
- 2022-01-26 03:46:06
@article{7a3647cf-ba4e-4d0a-9a87-f41f501b93e5,
abstract = {{Absorption and impedance mismatch due to the proximity of a user as well as certain propagation channel characteristics can severely degrade the multiple-input multiple-output (MIMO) performance of multi-antenna terminals in real usage scenarios. In this context, we investigated the potential of adaptive impedance matching (AIM) to mitigate performance degradation from these effects based on channel measurements involving a terminal prototype in three user scenarios and two propagation environments. First, optimal AIM state for the terminal in a given user-channel setup was found by post-processing the measured channels. The optimal state was then experimentally verified with two Maury Microwave mechanical tuners. The results show that by employing AIM instead of 50Ω termination, the average capacity is increased by up to 25%. Moreover, the observed capacity gains can be partly explained by physical mechanisms underlying the propagation conditions. Furthermore, the achieved gains with real tuners are only marginally affected by the tuners’ actual insertion losses, estimated to be 0.1-0.7 dB. Therefore, we conclude that AIM can be a viable solution to enhance MIMO terminal performance.}},
author = {{Vasilev, Ivaylo and Plicanic, Vanja and Tian, Ruiyuan and Lau, Buon Kiong}},
issn = {{1548-5757}},
language = {{eng}},
pages = {{1720--1723}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Antennas and Wireless Propagation Letters}},
title = {{Measured adaptive matching performance of a MIMO terminal with user effects}},
url = {{https://lup.lub.lu.se/search/files/42807626/vasilev_awpl2013.pdf}},
doi = {{10.1109/LAWP.2013.2295681}},
volume = {{12}},
year = {{2013}},
}