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Paper Abstract and Keywords
Presentation 2018-11-22 09:30
A Study on Efficient Spectrum Utilization for Feeder Link using Multipe Gateways in HAPS System
Takafumi Fujii, Yoshichika Ohta (HAPSmobile) RCS2018-203
Abstract (in Japanese) (See Japanese page) 
(in English) HAPS (High Altitude Platform Station), which is a stratosphere platform around 20Km altitude, cellular communication service makes it possible to directly communicate among ordinary land cellular phones. HAPS is also a promising system for service area expansions as well as reliable communication methods at various natural disasters. HAPS communication system is composed of service links which provide communications between HAPS and land cellular phones and a feeder link which establishes a communication between HAPS and a base station (Gateway). The communication capacity of HAPS service link is determined by the communication capacity of its feeder link, which is equivalent to repeater frequency. Therefore, an efficient spectrum usage of the feeder link is indispensable. In this paper, we propose a “Multiple Gateway System” for an efficient spectrum usage. Multiple Gateways placed on the land transmit and receive different feeder link signals at the same frequency. The proposed system can improve the efficient spectrum utilization as the number of Gateways increases by eliminating the interferences among feeder links.
Keyword (in Japanese) (See Japanese page) 
(in English) High Altitude Platform Station / MIMO / Interference canceller / / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 311, RCS2018-203, pp. 143-148, Nov. 2018.
Paper # RCS2018-203 
Date of Issue 2018-11-13 (RCS) 
ISSN Online edition: ISSN 2432-6380
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 RCS2018-203

Conference Information
Committee RCS AP  
Conference Date 2018-11-20 - 2018-11-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Industry Support Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2018-11-RCS-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Efficient Spectrum Utilization for Feeder Link using Multipe Gateways in HAPS System 
Sub Title (in English)  
Keyword(1) High Altitude Platform Station  
Keyword(2) MIMO  
Keyword(3) Interference canceller  
1st Author's Name Takafumi Fujii  
1st Author's Affiliation (HAPSmobile)
2nd Author's Name Yoshichika Ohta  
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Speaker Author-1 
Date Time 2018-11-22 09:30:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2018-203 
Volume (vol) vol.118 
Number (no) no.311 
Page pp.143-148 
Date of Issue 2018-11-13 (RCS) 

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