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Paper Abstract and Keywords
Presentation 2018-08-09 11:20
Field Trial of 28 GHz Band Downlink Massive MIMO in Railway Environment
Yuta Takahashi, Hiroyuki Miyazaki, Tatsuki Okuyama, Kazushi Muraoka, Jun Mashino, Satoshi Suyama, Yukihiko Okumura (NTT DOCOMO) RCS2018-133
Abstract (in Japanese) (See Japanese page) 
(in English) Field trials of the fifth-generation (5G) mobile communication system using 28 GHz band at which almost 1-GHz band will be available have been performed all over the world. To realize large coverage at such a high frequency band, beamforming by Massive MIMO (Multiple Input Multiple Output) is necessary to compensate large path loss. Furthermore, beam tracking which adaptively changes beam direction according to user location is an important function to support user mobility. Authors already conducted field trials of 28 GHz-band 5G transmission using a high speed motor car considering use of 5G in railway. However, the environment of the trail was not on railway track but on road. Also it was not impact how position of mobile stations in the railway car affects the performance of 5G transmission. Thus we conducted 5G filed trials in the actual railway environment. This report reveals results of downlink performances using railway cars traveling at 90 km/h.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / High Mobility / Massive MIMO / Beamforming / Beam Tracking / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 177, RCS2018-133, pp. 13-18, Aug. 2018.
Paper # RCS2018-133 
Date of Issue 2018-08-02 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
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reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SAT RCS  
Conference Date 2018-08-09 - 2018-08-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Iwate University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2018-08-SAT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Field Trial of 28 GHz Band Downlink Massive MIMO in Railway Environment 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) High Mobility  
Keyword(3) Massive MIMO  
Keyword(4) Beamforming  
Keyword(5) Beam Tracking  
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1st Author's Name Yuta Takahashi  
1st Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
2nd Author's Name Hiroyuki Miyazaki  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Tatsuki Okuyama  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Kazushi Muraoka  
4th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
5th Author's Name Jun Mashino  
5th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
6th Author's Name Satoshi Suyama  
6th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
7th Author's Name Yukihiko Okumura  
7th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Speaker Author-1 
Date Time 2018-08-09 11:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2018-133 
Volume (vol) vol.118 
Number (no) no.177 
Page pp.13-18 
#Pages
Date of Issue 2018-08-02 (RCS) 


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