On user effect compensation of MIMO terminals with adaptive impedance matching
(2013) IEEE International Symposium on Antennas and Propagation, 2013 p.174-175- Abstract
- Proximity of user has been established as a major cause of performance degradation in multiple-input multiple-output (MIMO) terminals. Here, we investigate the potential of adaptive impedance matching (AIM) to improve the performance of two MIMO terminals in a free space (FS) and a two-hand (TH) user scenario, assuming uniform 3D angular power spectrum for the incoming signal. The results show that lossless uncoupled AIM circuits can enhance the MIMO capacity of the terminals by up to 43% relative to standard 50 ohm terminations. In particular, the largest capacity gain is obtained in the terminal with good matching but narrower antenna bandwidth and worse isolation performance, for the TH scenario. On the other hand, the terminal with... (More)
- Proximity of user has been established as a major cause of performance degradation in multiple-input multiple-output (MIMO) terminals. Here, we investigate the potential of adaptive impedance matching (AIM) to improve the performance of two MIMO terminals in a free space (FS) and a two-hand (TH) user scenario, assuming uniform 3D angular power spectrum for the incoming signal. The results show that lossless uncoupled AIM circuits can enhance the MIMO capacity of the terminals by up to 43% relative to standard 50 ohm terminations. In particular, the largest capacity gain is obtained in the terminal with good matching but narrower antenna bandwidth and worse isolation performance, for the TH scenario. On the other hand, the terminal with poorer matching but higher isolation and significantly larger bandwidth has lower average capacity in FS. However, it is more robust to user proximity, and hence it achieves only 8% capacity gain with AIM in the TH scenario. Therefore, antenna design parameters can significantly influence potential benefits of AIM in practice. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3562470
- author
- Vasilev, Ivaylo LU ; Plicanic, Vanja LU and Lau, Buon Kiong LU
- organization
- publishing date
- 2013
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- IEEE International Symposium on Antennas and Propagation, 2013
- pages
- 2 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE International Symposium on Antennas and Propagation, 2013
- conference location
- Lake Buena Vista, FL, United States
- conference dates
- 2013-07-07 - 2013-07-13
- external identifiers
-
- wos:000332766800087
- scopus:84894222103
- ISSN
- 1947-1491
- 1522-3965
- DOI
- 10.1109/APS.2013.6710748
- 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
- ea3fc09a-e727-4d57-b298-bbe3e5ea041b (old id 3562470)
- date added to LUP
- 2016-04-01 11:14:26
- date last changed
- 2024-04-08 03:59:47
@inproceedings{ea3fc09a-e727-4d57-b298-bbe3e5ea041b, abstract = {{Proximity of user has been established as a major cause of performance degradation in multiple-input multiple-output (MIMO) terminals. Here, we investigate the potential of adaptive impedance matching (AIM) to improve the performance of two MIMO terminals in a free space (FS) and a two-hand (TH) user scenario, assuming uniform 3D angular power spectrum for the incoming signal. The results show that lossless uncoupled AIM circuits can enhance the MIMO capacity of the terminals by up to 43% relative to standard 50 ohm terminations. In particular, the largest capacity gain is obtained in the terminal with good matching but narrower antenna bandwidth and worse isolation performance, for the TH scenario. On the other hand, the terminal with poorer matching but higher isolation and significantly larger bandwidth has lower average capacity in FS. However, it is more robust to user proximity, and hence it achieves only 8% capacity gain with AIM in the TH scenario. Therefore, antenna design parameters can significantly influence potential benefits of AIM in practice.}}, author = {{Vasilev, Ivaylo and Plicanic, Vanja and Lau, Buon Kiong}}, booktitle = {{IEEE International Symposium on Antennas and Propagation, 2013}}, issn = {{1947-1491}}, language = {{eng}}, pages = {{174--175}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{On user effect compensation of MIMO terminals with adaptive impedance matching}}, url = {{https://lup.lub.lu.se/search/files/42855823/vasilev_aps2013.pdf}}, doi = {{10.1109/APS.2013.6710748}}, year = {{2013}}, }