Field Experimental Evaluation of Null Control Performance of MU-MIMO Considering Smart Vertical MIMO in LTE-Advanced Downlink under LOS Dominant Conditions
Summary :
The performance in terms of the user separation of multi-user multiple-input multiple-output (MU-MIMO) depends on not only the spatial correlation but also the location of the mobile stations (MSs). In order to take into account the performance in terms of the user separation, we need to consider the granularity of the beam and null width of the precoded antenna pattern in addition to the spatial correlation to determine the base station (BS) antenna configuration. In this paper, we propose Smart Vertical MIMO (SV-MIMO) as the best antenna configuration that achieves both spatial correlation and granularity of the beam and null width of the precoded antenna pattern. We evaluate SV-MIMO in a field experiment using a downlink 4-by-2 MU-MIMO configuration focusing on the dependency of the location of the MSs in Yokosuka, Japan. The majority of the measurement course is under line-of-sight (LOS) conditions in a single cell environment. The MSs are almost uniformly set 30 to 60 degrees in azimuth and 12 to 30 degrees in elevation and the distance from the BS antennas is approximately 150m at maximum. We also evaluate the performance of 4-by-2 MU-MIMO using the conventional type of horizontal array antenna and show the difference. The field experimental results show that throughput of greater than 1Gbps is achieved at the Cumulative Distribution Function (CDF) of 14% by employing SV-MIMO for Rank-4 MU-MIMO. The throughput of SV-MIMO is 30% higher than that for the horizontal array antenna configuration at the CDF of 50%.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E97-B No.10 pp.2136-2144
- Publication Date
- 2014/10/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E97.B.2136
- Type of Manuscript
- Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
- Category
Authors
Yuki INOUE
NTT DOCOMO, INC.
Daiki TAKEDA
NTT DOCOMO, INC.
Keisuke SAITO
NTT DOCOMO, INC.
Teruo KAWAMURA
NTT DOCOMO, INC.
Hidehiro ANDOH
NTT DOCOMO, INC.
Keyword
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Yuki INOUE, Daiki TAKEDA, Keisuke SAITO, Teruo KAWAMURA, Hidehiro ANDOH, "Field Experimental Evaluation of Null Control Performance of MU-MIMO Considering Smart Vertical MIMO in LTE-Advanced Downlink under LOS Dominant Conditions" in IEICE TRANSACTIONS on Communications,
vol. E97-B, no. 10, pp. 2136-2144, October 2014, doi: 10.1587/transcom.E97.B.2136.
Abstract: The performance in terms of the user separation of multi-user multiple-input multiple-output (MU-MIMO) depends on not only the spatial correlation but also the location of the mobile stations (MSs). In order to take into account the performance in terms of the user separation, we need to consider the granularity of the beam and null width of the precoded antenna pattern in addition to the spatial correlation to determine the base station (BS) antenna configuration. In this paper, we propose Smart Vertical MIMO (SV-MIMO) as the best antenna configuration that achieves both spatial correlation and granularity of the beam and null width of the precoded antenna pattern. We evaluate SV-MIMO in a field experiment using a downlink 4-by-2 MU-MIMO configuration focusing on the dependency of the location of the MSs in Yokosuka, Japan. The majority of the measurement course is under line-of-sight (LOS) conditions in a single cell environment. The MSs are almost uniformly set 30 to 60 degrees in azimuth and 12 to 30 degrees in elevation and the distance from the BS antennas is approximately 150m at maximum. We also evaluate the performance of 4-by-2 MU-MIMO using the conventional type of horizontal array antenna and show the difference. The field experimental results show that throughput of greater than 1Gbps is achieved at the Cumulative Distribution Function (CDF) of 14% by employing SV-MIMO for Rank-4 MU-MIMO. The throughput of SV-MIMO is 30% higher than that for the horizontal array antenna configuration at the CDF of 50%.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.2136/_p
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@ARTICLE{e97-b_10_2136,
author={Yuki INOUE, Daiki TAKEDA, Keisuke SAITO, Teruo KAWAMURA, Hidehiro ANDOH, },
journal={IEICE TRANSACTIONS on Communications},
title={Field Experimental Evaluation of Null Control Performance of MU-MIMO Considering Smart Vertical MIMO in LTE-Advanced Downlink under LOS Dominant Conditions},
year={2014},
volume={E97-B},
number={10},
pages={2136-2144},
abstract={The performance in terms of the user separation of multi-user multiple-input multiple-output (MU-MIMO) depends on not only the spatial correlation but also the location of the mobile stations (MSs). In order to take into account the performance in terms of the user separation, we need to consider the granularity of the beam and null width of the precoded antenna pattern in addition to the spatial correlation to determine the base station (BS) antenna configuration. In this paper, we propose Smart Vertical MIMO (SV-MIMO) as the best antenna configuration that achieves both spatial correlation and granularity of the beam and null width of the precoded antenna pattern. We evaluate SV-MIMO in a field experiment using a downlink 4-by-2 MU-MIMO configuration focusing on the dependency of the location of the MSs in Yokosuka, Japan. The majority of the measurement course is under line-of-sight (LOS) conditions in a single cell environment. The MSs are almost uniformly set 30 to 60 degrees in azimuth and 12 to 30 degrees in elevation and the distance from the BS antennas is approximately 150m at maximum. We also evaluate the performance of 4-by-2 MU-MIMO using the conventional type of horizontal array antenna and show the difference. The field experimental results show that throughput of greater than 1Gbps is achieved at the Cumulative Distribution Function (CDF) of 14% by employing SV-MIMO for Rank-4 MU-MIMO. The throughput of SV-MIMO is 30% higher than that for the horizontal array antenna configuration at the CDF of 50%.},
keywords={},
doi={10.1587/transcom.E97.B.2136},
ISSN={1745-1345},
month={October},}
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TY - JOUR
TI - Field Experimental Evaluation of Null Control Performance of MU-MIMO Considering Smart Vertical MIMO in LTE-Advanced Downlink under LOS Dominant Conditions
T2 - IEICE TRANSACTIONS on Communications
SP - 2136
EP - 2144
AU - Yuki INOUE
AU - Daiki TAKEDA
AU - Keisuke SAITO
AU - Teruo KAWAMURA
AU - Hidehiro ANDOH
PY - 2014
DO - 10.1587/transcom.E97.B.2136
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2014
AB - The performance in terms of the user separation of multi-user multiple-input multiple-output (MU-MIMO) depends on not only the spatial correlation but also the location of the mobile stations (MSs). In order to take into account the performance in terms of the user separation, we need to consider the granularity of the beam and null width of the precoded antenna pattern in addition to the spatial correlation to determine the base station (BS) antenna configuration. In this paper, we propose Smart Vertical MIMO (SV-MIMO) as the best antenna configuration that achieves both spatial correlation and granularity of the beam and null width of the precoded antenna pattern. We evaluate SV-MIMO in a field experiment using a downlink 4-by-2 MU-MIMO configuration focusing on the dependency of the location of the MSs in Yokosuka, Japan. The majority of the measurement course is under line-of-sight (LOS) conditions in a single cell environment. The MSs are almost uniformly set 30 to 60 degrees in azimuth and 12 to 30 degrees in elevation and the distance from the BS antennas is approximately 150m at maximum. We also evaluate the performance of 4-by-2 MU-MIMO using the conventional type of horizontal array antenna and show the difference. The field experimental results show that throughput of greater than 1Gbps is achieved at the Cumulative Distribution Function (CDF) of 14% by employing SV-MIMO for Rank-4 MU-MIMO. The throughput of SV-MIMO is 30% higher than that for the horizontal array antenna configuration at the CDF of 50%.
ER -
English
