First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands
Drastic improvements in transmission rate and system capacity are required towards 5th generation mobile communications (5G). One promising approach, utilizing the millimeter wave band for its rich spectrum resources, suffers area coverage shortfalls due to its large propagation loss. Fortunately, m...
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MDPI AG
2016-07-01
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author | Kazuki Maruta Tatsuhiko Iwakuni Atsushi Ohta Takuto Arai Yushi Shirato Satoshi Kurosaki Masataka Iizuka |
author_facet | Kazuki Maruta Tatsuhiko Iwakuni Atsushi Ohta Takuto Arai Yushi Shirato Satoshi Kurosaki Masataka Iizuka |
author_sort | Kazuki Maruta |
collection | DOAJ |
description | Drastic improvements in transmission rate and system capacity are required towards 5th generation mobile communications (5G). One promising approach, utilizing the millimeter wave band for its rich spectrum resources, suffers area coverage shortfalls due to its large propagation loss. Fortunately, massive multiple-input multiple-output (MIMO) can offset this shortfall as well as offer high order spatial multiplexing gain. Multiuser MIMO is also effective in further enhancing system capacity by multiplexing spatially de-correlated users. However, the transmission performance of multiuser MIMO is strongly degraded by channel time variation, which causes inter-user interference since null steering must be performed at the transmitter. This paper first addresses the effectiveness of multiuser massive MIMO transmission that exploits the first eigenmode for each user. In Line-of-Sight (LoS) dominant channel environments, the first eigenmode is chiefly formed by the LoS component, which is highly correlated with user movement. Therefore, the first eigenmode provided by a large antenna array can improve the robustness against the channel time variation. In addition, we propose a simplified beamforming scheme based on high efficient channel state information (CSI) estimation that extracts the LoS component. We also show that this approximate beamforming can achieve throughput performance comparable to that of the rigorous first eigenmode transmission. Our proposed multiuser massive MIMO scheme can open the door for practical millimeter wave communication with enhanced system capacity. |
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language | English |
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spelling | doaj.art-676533046d7f43dfbf985a4a51409e7f2022-12-22T02:53:01ZengMDPI AGSensors1424-82202016-07-01167105110.3390/s16071051s16071051First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave BandsKazuki Maruta0Tatsuhiko Iwakuni1Atsushi Ohta2Takuto Arai3Yushi Shirato4Satoshi Kurosaki5Masataka Iizuka6NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanNTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa 239-0847, JapanDrastic improvements in transmission rate and system capacity are required towards 5th generation mobile communications (5G). One promising approach, utilizing the millimeter wave band for its rich spectrum resources, suffers area coverage shortfalls due to its large propagation loss. Fortunately, massive multiple-input multiple-output (MIMO) can offset this shortfall as well as offer high order spatial multiplexing gain. Multiuser MIMO is also effective in further enhancing system capacity by multiplexing spatially de-correlated users. However, the transmission performance of multiuser MIMO is strongly degraded by channel time variation, which causes inter-user interference since null steering must be performed at the transmitter. This paper first addresses the effectiveness of multiuser massive MIMO transmission that exploits the first eigenmode for each user. In Line-of-Sight (LoS) dominant channel environments, the first eigenmode is chiefly formed by the LoS component, which is highly correlated with user movement. Therefore, the first eigenmode provided by a large antenna array can improve the robustness against the channel time variation. In addition, we propose a simplified beamforming scheme based on high efficient channel state information (CSI) estimation that extracts the LoS component. We also show that this approximate beamforming can achieve throughput performance comparable to that of the rigorous first eigenmode transmission. Our proposed multiuser massive MIMO scheme can open the door for practical millimeter wave communication with enhanced system capacity.http://www.mdpi.com/1424-8220/16/7/1051massive MIMOmultiuser MIMOfirst eigenmodemillimeter wavechannel estimationchannel time variation |
spellingShingle | Kazuki Maruta Tatsuhiko Iwakuni Atsushi Ohta Takuto Arai Yushi Shirato Satoshi Kurosaki Masataka Iizuka First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands Sensors massive MIMO multiuser MIMO first eigenmode millimeter wave channel estimation channel time variation |
title | First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands |
title_full | First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands |
title_fullStr | First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands |
title_full_unstemmed | First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands |
title_short | First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands |
title_sort | first eigenmode transmission by high efficient csi estimation for multiuser massive mimo using millimeter wave bands |
topic | massive MIMO multiuser MIMO first eigenmode millimeter wave channel estimation channel time variation |
url | http://www.mdpi.com/1424-8220/16/7/1051 |
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