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Paper Abstract and Keywords
Presentation 2025-11-13 16:40
Introduction of 400MHz narrowband LoRa communication system effective in hilly and mountainous areas
Yukio Nakata (DKK Co., Ltd), Masahiro Fukumoto (Kochi University of Technology), Tadashige Iwao (Kochi Univ.) AP2025-164
Abstract (in Japanese) (See Japanese page) 
(in English) In the hilly and mountainous areas of Shikoku, there is a growing need for low-capacity, low number of times wireless systems for agricultural water level monitoring and other applications. While there are currently institutionalized methods for using LPWA in the 920MHz and 429MHz bands, it is difficult to reach beyond the line of sight over the mountains. To solve this problem, a 400MHz narrowband LoRa communication system was tested with an eye toward institutionalization, using LoRa with high reception sensitivity and increased transmission output to 1W, making it possible to introduce the system within Shikoku.
Keyword (in Japanese) (See Japanese page) 
(in English) 400MHz band LoRa / hilly and mountainous areas / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 241, AP2025-164, pp. 73-77, Nov. 2025.
Paper # AP2025-164 
Date of Issue 2025-11-05 (AP) 
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 AP2025-164

Conference Information
Committee AP RCS  
Conference Date 2025-11-12 - 2025-11-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Prefectural Convention Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. 
Paper Information
Registration To AP 
Conference Code 2025-11-AP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Introduction of 400MHz narrowband LoRa communication system effective in hilly and mountainous areas 
Sub Title (in English)  
Keyword(1) 400MHz band LoRa  
Keyword(2) hilly and mountainous areas  
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1st Author's Name Yukio Nakata  
1st Author's Affiliation DKK Co., Ltd (DKK Co., Ltd)
2nd Author's Name Masahiro Fukumoto  
2nd Author's Affiliation Kochi University of Technology (Kochi University of Technology)
3rd Author's Name Tadashige Iwao  
3rd Author's Affiliation Kochi University (Kochi Univ.)
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Speaker Author-1 
Date Time 2025-11-13 16:40:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2025-164 
Volume (vol) vol.125 
Number (no) no.241 
Page pp.73-77 
#Pages 5 
Date of Issue 2025-11-05 (AP) 

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