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Paper Abstract and Keywords
Presentation 2025-10-28 13:55
Investigation of Interpolation Methods for Radio Map Generation Using Real-Time Spectrum Monitors
Tatsuya Hatagi, Taketo Kakimoto, Masataka Miyake, Suguru Kameda (Hiroshima Univ.) SR2025-40
Abstract (in Japanese) (See Japanese page) 
(in English) To maintain stable communication in a smart factory, it is important to understand the wireless environment.
Considering that the environment constantly changes, it is necessary to update the radio map in real time during measurement.
In this investigation, we propose a method for generating a radio map by time-synchronizing multiple real-time spectrum monitors and interpolating the acquired data.
Furthermore, as an interpolation method, we introduce an obstacle parameter into the conventional inverse distance weighting (IDW) method and develop two approaches: (I) a general-purpose approach based on measured data obtained in other environments, and (II) an optimization approach based on measurements in the same environment.
We measured the received power in a factory environment and compared the proposed approaches with the conventional interpolation method in
terms of radio map accuracy and computation time.
The results showed that approach II improved interpolation accuracy by up to 2.40 dB compared with the conventional method (IDW and kriging), while maintaining a similar computation time. These results confirm the effectiveness of the proposed method for real-time radio map generation.
Keyword (in Japanese) (See Japanese page) 
(in English) radio map / real-time spectrum monitor / time synchronization / inverse distance weighting / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 218, SR2025-40, pp. 8-14, Oct. 2025.
Paper # SR2025-40 
Date of Issue 2025-10-21 (SR) 
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 SR2025-40

Conference Information
Committee SR  
Conference Date 2025-10-28 - 2025-10-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumamoto Kozo Keikaku Engineering Inc. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Software-defined radio, cognitive radio, spectrum sharing, general topics, technical exhibition 
Paper Information
Registration To SR 
Conference Code 2025-10-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of Interpolation Methods for Radio Map Generation Using Real-Time Spectrum Monitors 
Sub Title (in English)  
Keyword(1) radio map  
Keyword(2) real-time spectrum monitor  
Keyword(3) time synchronization  
Keyword(4) inverse distance weighting  
Keyword(5)  
Keyword(6)  
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1st Author's Name Tatsuya Hatagi  
1st Author's Affiliation Hiroshima University (Hiroshima Univ.)
2nd Author's Name Taketo Kakimoto  
2nd Author's Affiliation Hiroshima University (Hiroshima Univ.)
3rd Author's Name Masataka Miyake  
3rd Author's Affiliation Hiroshima University (Hiroshima Univ.)
4th Author's Name Suguru Kameda  
4th Author's Affiliation Hiroshima University (Hiroshima Univ.)
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Speaker Author-1 
Date Time 2025-10-28 13:55:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2025-40 
Volume (vol) vol.125 
Number (no) no.218 
Page pp.8-14 
#Pages 7 
Date of Issue 2025-10-21 (SR) 

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