Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access

Daisuke KURITA; Kiichi TATEISHI; Atsushi HARADA; Yoshihisa KISHIYAMA; Takehiro NAKAMURA; Stefan PARKVALL; Erik DAHLMAN; Johan FURUSKOG

doi:10.1587/transcom.2016FGP0027

Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access

Daisuke KURITA, Kiichi TATEISHI, Atsushi HARADA, Yoshihisa KISHIYAMA, Takehiro NAKAMURA, Stefan PARKVALL, Erik DAHLMAN, Johan FURUSKOG

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This paper presents outdoor field experimental results to clarify the 4-by-4 multiple-input multiple-output (MIMO) throughput performance when applying joint transmission (JT) and distributed MIMO to the 15-GHz frequency band in the downlink of a 5G cellular radio access system. Experimental results for JT in a 100m × 70m large-cell scenario show that throughput improvement of up to 10% is achieved in most of the area and the peak data rate is improved from 2.8Gbps to 3.7Gbps. Based on analysis of the reference signal received power (RSRP) and channel correlation, we find that the RSRP is improved in lower RSRP areas, and that the channel correlation is improved in higher RSRP areas. These improvements contribute to higher throughput performance. The advantage of distributed MIMO and JT are compared in a 20m × 20m small-cell scenario. The throughput improvement of 70% and throughput exceeding 5 Gbps were achieved when applying distributed MIMO due to the improvement in the channel correlation. When applying JT, the RSRP is improved; however the channel correlation is not. As a result, there is no improvement in the throughput performance in the area. Finally, the relationship between the transmission point (TP) allocation and the direction of user equipment (UE) antenna arrangement is investigated. Two TP positions at 90 and 180deg. from each other are shown to be advantageous in terms of the throughput performance with different direction of UE antenna arrangement. Thus, we conclude that JT and distributed MIMO are promising technologies for the 5G radio access system that can compensate for the propagation loss and channel correlation in high frequency bands.

Publication: IEICE TRANSACTIONS on Communications Vol.E100-B No.8 pp.1247-1255

Publication Date: 2017/08/01

Publicized: 2017/02/08

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2016FGP0027

Type of Manuscript: Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)

Category: Wireless Communication Technologies

Authors

Daisuke KURITA
  NTT DOCOMO, INC.
Kiichi TATEISHI
  NTT DOCOMO, INC.
Atsushi HARADA
  NTT DOCOMO, INC.
Yoshihisa KISHIYAMA
  NTT DOCOMO, INC.
Takehiro NAKAMURA
  NTT DOCOMO, INC.
Stefan PARKVALL
  Ericsson Research
Erik DAHLMAN
  Ericsson Research
Johan FURUSKOG
  Ericsson Research

Keyword

5G, higher frequency bands, multi-point transmission, joint transmission, field experiments

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Daisuke KURITA, Kiichi TATEISHI, Atsushi HARADA, Yoshihisa KISHIYAMA, Takehiro NAKAMURA, Stefan PARKVALL, Erik DAHLMAN, Johan FURUSKOG, "Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access" in IEICE TRANSACTIONS on Communications, vol. E100-B, no. 8, pp. 1247-1255, August 2017, doi: 10.1587/transcom.2016FGP0027.
Abstract: This paper presents outdoor field experimental results to clarify the 4-by-4 multiple-input multiple-output (MIMO) throughput performance when applying joint transmission (JT) and distributed MIMO to the 15-GHz frequency band in the downlink of a 5G cellular radio access system. Experimental results for JT in a 100m × 70m large-cell scenario show that throughput improvement of up to 10% is achieved in most of the area and the peak data rate is improved from 2.8Gbps to 3.7Gbps. Based on analysis of the reference signal received power (RSRP) and channel correlation, we find that the RSRP is improved in lower RSRP areas, and that the channel correlation is improved in higher RSRP areas. These improvements contribute to higher throughput performance. The advantage of distributed MIMO and JT are compared in a 20m × 20m small-cell scenario. The throughput improvement of 70% and throughput exceeding 5 Gbps were achieved when applying distributed MIMO due to the improvement in the channel correlation. When applying JT, the RSRP is improved; however the channel correlation is not. As a result, there is no improvement in the throughput performance in the area. Finally, the relationship between the transmission point (TP) allocation and the direction of user equipment (UE) antenna arrangement is investigated. Two TP positions at 90 and 180deg. from each other are shown to be advantageous in terms of the throughput performance with different direction of UE antenna arrangement. Thus, we conclude that JT and distributed MIMO are promising technologies for the 5G radio access system that can compensate for the propagation loss and channel correlation in high frequency bands.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2016FGP0027/_p

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@ARTICLE{e100-b_8_1247,
author={Daisuke KURITA, Kiichi TATEISHI, Atsushi HARADA, Yoshihisa KISHIYAMA, Takehiro NAKAMURA, Stefan PARKVALL, Erik DAHLMAN, Johan FURUSKOG, },
journal={IEICE TRANSACTIONS on Communications},
title={Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access},
year={2017},
volume={E100-B},
number={8},
pages={1247-1255},
abstract={This paper presents outdoor field experimental results to clarify the 4-by-4 multiple-input multiple-output (MIMO) throughput performance when applying joint transmission (JT) and distributed MIMO to the 15-GHz frequency band in the downlink of a 5G cellular radio access system. Experimental results for JT in a 100m × 70m large-cell scenario show that throughput improvement of up to 10% is achieved in most of the area and the peak data rate is improved from 2.8Gbps to 3.7Gbps. Based on analysis of the reference signal received power (RSRP) and channel correlation, we find that the RSRP is improved in lower RSRP areas, and that the channel correlation is improved in higher RSRP areas. These improvements contribute to higher throughput performance. The advantage of distributed MIMO and JT are compared in a 20m × 20m small-cell scenario. The throughput improvement of 70% and throughput exceeding 5 Gbps were achieved when applying distributed MIMO due to the improvement in the channel correlation. When applying JT, the RSRP is improved; however the channel correlation is not. As a result, there is no improvement in the throughput performance in the area. Finally, the relationship between the transmission point (TP) allocation and the direction of user equipment (UE) antenna arrangement is investigated. Two TP positions at 90 and 180deg. from each other are shown to be advantageous in terms of the throughput performance with different direction of UE antenna arrangement. Thus, we conclude that JT and distributed MIMO are promising technologies for the 5G radio access system that can compensate for the propagation loss and channel correlation in high frequency bands.},
keywords={},
doi={10.1587/transcom.2016FGP0027},
ISSN={1745-1345},
month={August},}

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TY - JOUR
TI - Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access
T2 - IEICE TRANSACTIONS on Communications
SP - 1247
EP - 1255
AU - Daisuke KURITA
AU - Kiichi TATEISHI
AU - Atsushi HARADA
AU - Yoshihisa KISHIYAMA
AU - Takehiro NAKAMURA
AU - Stefan PARKVALL
AU - Erik DAHLMAN
AU - Johan FURUSKOG
PY - 2017
DO - 10.1587/transcom.2016FGP0027
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2017
AB - This paper presents outdoor field experimental results to clarify the 4-by-4 multiple-input multiple-output (MIMO) throughput performance when applying joint transmission (JT) and distributed MIMO to the 15-GHz frequency band in the downlink of a 5G cellular radio access system. Experimental results for JT in a 100m × 70m large-cell scenario show that throughput improvement of up to 10% is achieved in most of the area and the peak data rate is improved from 2.8Gbps to 3.7Gbps. Based on analysis of the reference signal received power (RSRP) and channel correlation, we find that the RSRP is improved in lower RSRP areas, and that the channel correlation is improved in higher RSRP areas. These improvements contribute to higher throughput performance. The advantage of distributed MIMO and JT are compared in a 20m × 20m small-cell scenario. The throughput improvement of 70% and throughput exceeding 5 Gbps were achieved when applying distributed MIMO due to the improvement in the channel correlation. When applying JT, the RSRP is improved; however the channel correlation is not. As a result, there is no improvement in the throughput performance in the area. Finally, the relationship between the transmission point (TP) allocation and the direction of user equipment (UE) antenna arrangement is investigated. Two TP positions at 90 and 180deg. from each other are shown to be advantageous in terms of the throughput performance with different direction of UE antenna arrangement. Thus, we conclude that JT and distributed MIMO are promising technologies for the 5G radio access system that can compensate for the propagation loss and channel correlation in high frequency bands.
ER -