Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment

Takuto ARAI; Atsushi OHTA; Yushi SHIRATO; Satoshi KUROSAKI; Kazuki MARUTA; Tatsuhiko IWAKUNI; Masataka IIZUKA

doi:10.1587/transcom.2015EBP3529

Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment

Takuto ARAI, Atsushi OHTA, Yushi SHIRATO, Satoshi KUROSAKI, Kazuki MARUTA, Tatsuhiko IWAKUNI, Masataka IIZUKA

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This paper proposes a new antenna array design of Massive MIMO for capacity enhancement in line of sight (LOS) environments. Massive MIMO has two key problems: the heavy overhead of feeding back the channel state information (CSI) for very large number of transmission and reception antenna element pairs and the huge computation complexity imposed by the very large scale matrixes. We have already proposed a practical application of Massive MIMO, that is, Massive Antenna Systems for Wireless Entrance links (MAS-WE), which can clearly solve the two key problems of Massive MIMO. However, the conventional antenna array arrangements; e.g. uniform planar array (UPA) or uniform circular array (UCA) degrade the system capacity of MAS-WE due to the channel spatial correlation created by the inter-element spacing. When the LOS component dominates the propagation channel, the antenna array can be designed to minimize the inter-user channel correlation. We propose an antenna array arrangement to control the grating-lobe positions and achieve very low channel spatial correlation. Simulation results show that the proposed arrangement can reduce the spatial correlation at CDF=50% value by 80% compared to UCA and 75% compared to UPA.

Publication: IEICE TRANSACTIONS on Communications Vol.E100-B No.4 pp.594-601

Publication Date: 2017/04/01

Publicized: 2016/10/21

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2015EBP3529

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Takuto ARAI
  NTT Corporation
Atsushi OHTA
  NTT Corporation
Yushi SHIRATO
  NTT Corporation
Satoshi KUROSAKI
  NTT Corporation
Kazuki MARUTA
  NTT Corporation
Tatsuhiko IWAKUNI
  NTT Corporation
Masataka IIZUKA
  NTT Corporation

Keyword

massive MIMO, multi-user MIMO, antenna arrangement, line of sight, spatial correlation

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Takuto ARAI, Atsushi OHTA, Yushi SHIRATO, Satoshi KUROSAKI, Kazuki MARUTA, Tatsuhiko IWAKUNI, Masataka IIZUKA, "Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment" in IEICE TRANSACTIONS on Communications, vol. E100-B, no. 4, pp. 594-601, April 2017, doi: 10.1587/transcom.2015EBP3529.
Abstract: This paper proposes a new antenna array design of Massive MIMO for capacity enhancement in line of sight (LOS) environments. Massive MIMO has two key problems: the heavy overhead of feeding back the channel state information (CSI) for very large number of transmission and reception antenna element pairs and the huge computation complexity imposed by the very large scale matrixes. We have already proposed a practical application of Massive MIMO, that is, Massive Antenna Systems for Wireless Entrance links (MAS-WE), which can clearly solve the two key problems of Massive MIMO. However, the conventional antenna array arrangements; e.g. uniform planar array (UPA) or uniform circular array (UCA) degrade the system capacity of MAS-WE due to the channel spatial correlation created by the inter-element spacing. When the LOS component dominates the propagation channel, the antenna array can be designed to minimize the inter-user channel correlation. We propose an antenna array arrangement to control the grating-lobe positions and achieve very low channel spatial correlation. Simulation results show that the proposed arrangement can reduce the spatial correlation at CDF=50% value by 80% compared to UCA and 75% compared to UPA.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2015EBP3529/_p

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@ARTICLE{e100-b_4_594,
author={Takuto ARAI, Atsushi OHTA, Yushi SHIRATO, Satoshi KUROSAKI, Kazuki MARUTA, Tatsuhiko IWAKUNI, Masataka IIZUKA, },
journal={IEICE TRANSACTIONS on Communications},
title={Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment},
year={2017},
volume={E100-B},
number={4},
pages={594-601},
abstract={This paper proposes a new antenna array design of Massive MIMO for capacity enhancement in line of sight (LOS) environments. Massive MIMO has two key problems: the heavy overhead of feeding back the channel state information (CSI) for very large number of transmission and reception antenna element pairs and the huge computation complexity imposed by the very large scale matrixes. We have already proposed a practical application of Massive MIMO, that is, Massive Antenna Systems for Wireless Entrance links (MAS-WE), which can clearly solve the two key problems of Massive MIMO. However, the conventional antenna array arrangements; e.g. uniform planar array (UPA) or uniform circular array (UCA) degrade the system capacity of MAS-WE due to the channel spatial correlation created by the inter-element spacing. When the LOS component dominates the propagation channel, the antenna array can be designed to minimize the inter-user channel correlation. We propose an antenna array arrangement to control the grating-lobe positions and achieve very low channel spatial correlation. Simulation results show that the proposed arrangement can reduce the spatial correlation at CDF=50% value by 80% compared to UCA and 75% compared to UPA.},
keywords={},
doi={10.1587/transcom.2015EBP3529},
ISSN={1745-1345},
month={April},}

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TY - JOUR
TI - Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 594
EP - 601
AU - Takuto ARAI
AU - Atsushi OHTA
AU - Yushi SHIRATO
AU - Satoshi KUROSAKI
AU - Kazuki MARUTA
AU - Tatsuhiko IWAKUNI
AU - Masataka IIZUKA
PY - 2017
DO - 10.1587/transcom.2015EBP3529
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2017
AB - This paper proposes a new antenna array design of Massive MIMO for capacity enhancement in line of sight (LOS) environments. Massive MIMO has two key problems: the heavy overhead of feeding back the channel state information (CSI) for very large number of transmission and reception antenna element pairs and the huge computation complexity imposed by the very large scale matrixes. We have already proposed a practical application of Massive MIMO, that is, Massive Antenna Systems for Wireless Entrance links (MAS-WE), which can clearly solve the two key problems of Massive MIMO. However, the conventional antenna array arrangements; e.g. uniform planar array (UPA) or uniform circular array (UCA) degrade the system capacity of MAS-WE due to the channel spatial correlation created by the inter-element spacing. When the LOS component dominates the propagation channel, the antenna array can be designed to minimize the inter-user channel correlation. We propose an antenna array arrangement to control the grating-lobe positions and achieve very low channel spatial correlation. Simulation results show that the proposed arrangement can reduce the spatial correlation at CDF=50% value by 80% compared to UCA and 75% compared to UPA.
ER -