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Paper Abstract and Keywords
Presentation 2017-04-20 14:25
Evaluation of Effective Gain of Array Antenna at 20-GHz Band in Urban Street Canyon
Ngochao Tran, Tetsuro Imai, Koshiro Kitao, Yukihiko Okumura (NTT Docomo) AP2017-7
Abstract (in Japanese) (See Japanese page) 
(in English) The future mobile communications systems (5G), which enables data transmission rate as high as 10 Gbps has been the focus of studies recently. To transmit data with very high bit rate, wider bandwidth channels are required. One approach is using high frequency bands over 6 GHz (6-100 GHz). Considering applying the high frequency bands to the urban street canyon environment in which, the base station antennas may be installed at roadsides or at walls of high-rise buildings with low antenna heights, and the density of pedestrians and vehicles are high, the time-variant channel characteristics cause of blocking paths or appearing new paths due to scattering by moving objects such as pedestrians and vehicles may degrade the beamforming gain of array antennas. In this paper, we use a massive array antenna and channel sounder to measure channel characteristics at 20 GHz band and evaluate the beamforming gain degradation of the array antenna with a parameter of element or size.
Keyword (in Japanese) (See Japanese page) 
(in English) High frequency over 6 GHz / 5G / time variant channel characteristics / beamforming gain degradation / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 2, AP2017-7, pp. 35-39, April 2017.
Paper # AP2017-7 
Date of Issue 2017-04-13 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF AP2017-7

Conference Information
Committee AP  
Conference Date 2017-04-20 - 2017-04-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka university 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2017-04-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Effective Gain of Array Antenna at 20-GHz Band in Urban Street Canyon 
Sub Title (in English)  
Keyword(1) High frequency over 6 GHz  
Keyword(2) 5G  
Keyword(3) time variant channel characteristics  
Keyword(4) beamforming gain degradation  
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Keyword(6)  
Keyword(7)  
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1st Author's Name Ngochao Tran  
1st Author's Affiliation NTT DOCOMO, INC. (NTT Docomo)
2nd Author's Name Tetsuro Imai  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT Docomo)
3rd Author's Name Koshiro Kitao  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT Docomo)
4th Author's Name Yukihiko Okumura  
4th Author's Affiliation NTT DOCOMO, INC. (NTT Docomo)
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Speaker Author-1 
Date Time 2017-04-20 14:25:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2017-7 
Volume (vol) vol.117 
Number (no) no.2 
Page pp.35-39 
#Pages 5 
Date of Issue 2017-04-13 (AP) 

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