Impact of antenna design on MIMO performance for compact terminals with adaptive impedance matching
(2016) In IEEE Transactions on Antennas and Propagation 64(4). p.1454-1465- Abstract
- Using the metrics of channel capacity and multiplexing efficiency, the adaptive impedance matching (AIM) performances of two multiple-input multiple-output (MIMO) terminals with different antenna designs were evaluated and compared. The evaluation was performed in LTE Band 18 Downlink (860-875 MHz) under realistic usage conditions of two measured user handgrips and simulated propagation channels with different angular spreads (ASs). The results provide potential performance gains from AIM based on realistic MIMO terminal prototypes, and the underlying mechanisms by which the gains were achieved, which can serve as antenna and AIM circuit design guidelines. In particular, the evaluation revealed that ideal uncoupled AIM networks can... (More)
- Using the metrics of channel capacity and multiplexing efficiency, the adaptive impedance matching (AIM) performances of two multiple-input multiple-output (MIMO) terminals with different antenna designs were evaluated and compared. The evaluation was performed in LTE Band 18 Downlink (860-875 MHz) under realistic usage conditions of two measured user handgrips and simulated propagation channels with different angular spreads (ASs). The results provide potential performance gains from AIM based on realistic MIMO terminal prototypes, and the underlying mechanisms by which the gains were achieved, which can serve as antenna and AIM circuit design guidelines. In particular, the evaluation revealed that ideal uncoupled AIM networks can increase the capacity by up to 52% relative to 50 ohm terminations. However, the observed gains depend heavily on the antenna design, the user scenario and the channel’s angular spread. For example, the wideband design in different user cases experienced capacity gain of 4-9% from AIM in uniform 3D channels, in contrast to the 1.3-44% gain seen in a conventional narrowband design. In non-uniform channels with small ASs, the AIM gain for different mean incident angles depends on the absolute mean effective gain (MEG) and the change in correlation due to AIM; In cases where AIM has little impact on correlation, the mean incident angles with high AIM gains were close to those with high MEGs. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8519401
- author
- Vasilev, Ivaylo LU ; Plicanic, Vanja LU and Lau, Buon Kiong LU
- organization
- publishing date
- 2016-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- MIMO systems, impedance matching, antenna measurements, handset antennas and multipath channels
- in
- IEEE Transactions on Antennas and Propagation
- volume
- 64
- issue
- 4
- pages
- 12 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:84963971172
- wos:000374550600029
- ISSN
- 0018-926X
- DOI
- 10.1109/TAP.2016.2521885
- 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
- ELLIIT LU P01: 5G Wireless
- language
- English
- LU publication?
- yes
- id
- 618c3c4f-f480-40ae-b355-75ac60ace138 (old id 8519401)
- date added to LUP
- 2016-04-04 09:03:47
- date last changed
- 2022-05-16 22:39:21
@article{618c3c4f-f480-40ae-b355-75ac60ace138, abstract = {{Using the metrics of channel capacity and multiplexing efficiency, the adaptive impedance matching (AIM) performances of two multiple-input multiple-output (MIMO) terminals with different antenna designs were evaluated and compared. The evaluation was performed in LTE Band 18 Downlink (860-875 MHz) under realistic usage conditions of two measured user handgrips and simulated propagation channels with different angular spreads (ASs). The results provide potential performance gains from AIM based on realistic MIMO terminal prototypes, and the underlying mechanisms by which the gains were achieved, which can serve as antenna and AIM circuit design guidelines. In particular, the evaluation revealed that ideal uncoupled AIM networks can increase the capacity by up to 52% relative to 50 ohm terminations. However, the observed gains depend heavily on the antenna design, the user scenario and the channel’s angular spread. For example, the wideband design in different user cases experienced capacity gain of 4-9% from AIM in uniform 3D channels, in contrast to the 1.3-44% gain seen in a conventional narrowband design. In non-uniform channels with small ASs, the AIM gain for different mean incident angles depends on the absolute mean effective gain (MEG) and the change in correlation due to AIM; In cases where AIM has little impact on correlation, the mean incident angles with high AIM gains were close to those with high MEGs.}}, author = {{Vasilev, Ivaylo and Plicanic, Vanja and Lau, Buon Kiong}}, issn = {{0018-926X}}, keywords = {{MIMO systems; impedance matching; antenna measurements; handset antennas and multipath channels}}, language = {{eng}}, number = {{4}}, pages = {{1454--1465}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Antennas and Propagation}}, title = {{Impact of antenna design on MIMO performance for compact terminals with adaptive impedance matching}}, url = {{https://lup.lub.lu.se/search/files/5221180/8572824.pdf}}, doi = {{10.1109/TAP.2016.2521885}}, volume = {{64}}, year = {{2016}}, }