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Paper Abstract and Keywords
Presentation 2023-07-13 11:00
38GHz-band radio propagation measurement from lower stratosphere actualizing HAPS communication system
Yuki Hokazono, Hinata Kohara, Yuto Muroki, Kenzi Fukasawa (NTT DOCOMO), Jun Suzuki, Hiromu Kitanozono (SKY Perfect JSAT) SAT2023-17
Abstract (in Japanese) (See Japanese page) 
(in English) High-altitude platform stations (HAPSs) using broadband millimeter waves promise to enable the timely provisioning of the required high-speed large-capacity access in various locations including mountainous areas, air, and sea. Since no radio propagation measurements from the stratosphere to the ground have been conducted in the 38 GHz band, it is necessary to clarify the characteristics of radio propagation to realize the HAPS broadband system. In this paper, we report on the world’s first measurement of 38 GHz radio propagation from the lower stratosphere using a high-altitude aircraft, which was conducted in a measurement environment close to the actual operation of HAPS.We present an evaluation of radio propagation characteristics under various elevation angles and weather conditions, as well as the influence of aircraft turning on radio propagation. Experimental results show that the International Telecommunication Union Radiocommunication Sector (ITU-R) recommendations, which summarize attenuation probabilities due to weather conditions for terrestrial radio lines and satellite communication lines, apply to the stratospheric radio propagation environment under the influence of aircraft turning.
Keyword (in Japanese) (See Japanese page) 
(in English) NTN / HAPS / 38GHz-band / propagation measurement / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 105, SAT2023-17, pp. 41-46, July 2023.
Paper # SAT2023-17 
Date of Issue 2023-07-05 (SAT) 
ISSN 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 SAT2023-17

Conference Information
Committee AP SANE SAT  
Conference Date 2023-07-12 - 2023-07-14 
Place (in Japanese) (See Japanese page) 
Place (in English) The Citizen Activity Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Sattelite Communication, Radio propagation, Antennas and Propagation 
Paper Information
Registration To SAT 
Conference Code 2023-07-AP-SANE-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) 38GHz-band radio propagation measurement from lower stratosphere actualizing HAPS communication system 
Sub Title (in English)  
Keyword(1) NTN  
Keyword(2) HAPS  
Keyword(3) 38GHz-band  
Keyword(4) propagation measurement  
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1st Author's Name Yuki Hokazono  
1st Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
2nd Author's Name Hinata Kohara  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Yuto Muroki  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Kenzi Fukasawa  
4th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
5th Author's Name Jun Suzuki  
5th Author's Affiliation SKY Perfect JSAT Corporation (SKY Perfect JSAT)
6th Author's Name Hiromu Kitanozono  
6th Author's Affiliation SKY Perfect JSAT Corporation (SKY Perfect JSAT)
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Speaker Author-1 
Date Time 2023-07-13 11:00:00 
Presentation Time 20 minutes 
Registration for SAT 
Paper # SAT2023-17 
Volume (vol) vol.123 
Number (no) no.105 
Page pp.41-46 
#Pages 6 
Date of Issue 2023-07-05 (SAT) 

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