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Paper Abstract and Keywords
Presentation 2025-05-22 13:40
Wi-Fi Received Signal Strength-Based Indoor Localization System Using Weighted Centroid Method and Fingerprint Method
Masato Sawase, Tatsuki Yanagawa, Hiroaki Otsuka, Kazuki Komatsu, Hideyuki Uehara (Toyohashi Univ. of Tech.) SeMI2025-13
Abstract (in Japanese) (See Japanese page) 
(in English) Various localization methods have been studied using the Received Signal Strength Indicator (RSSI), which can be obtained from Wi-Fi access points(AP), for indoor environments where the Global Navigation Satellite System (GNSS) cannot be used. We have been developing an indoor localization system based on Weighted Centroid Localization (WCL) used in Toyohashi University of Technology (TUT). However, WCL-based localization suffers from the number and placement of APs, which significantly degrades localization accuracy in some locations. Therefore, this report aims to improve the localization accuracy by combining WCL and Fingerprint (FP). A section estimation method is introduced to determine which localization method, WCL or FP, should be used. We evaluated the localization accuracy of the proposed method using RSSI data measured on the second floor of TUT’s D building. The result shows a maximum improvement of 5.66 m average error and suggests that a movement intervals greater than 4 m for a section estimation is required.
Keyword (in Japanese) (See Japanese page) 
(in English) Indoor Localization / Wi-Fi / Access Point / Received Signal Strength Indicator / Weighted Centroid Localization / Fingerprint / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 29, SeMI2025-13, pp. 70-75, May 2025.
Paper # SeMI2025-13 
Date of Issue 2025-05-14 (SeMI) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee SeMI IPSJ-MBL IPSJ-ITS IPSJ-DPS  
Conference Date 2025-05-21 - 2025-05-23 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SeMI 
Conference Code 2025-05-SeMI-MBL-ITS-DPS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Wi-Fi Received Signal Strength-Based Indoor Localization System Using Weighted Centroid Method and Fingerprint Method 
Sub Title (in English)  
Keyword(1) Indoor Localization  
Keyword(2) Wi-Fi  
Keyword(3) Access Point  
Keyword(4) Received Signal Strength Indicator  
Keyword(5) Weighted Centroid Localization  
Keyword(6) Fingerprint  
Keyword(7)  
Keyword(8)  
1st Author's Name Masato Sawase  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
2nd Author's Name Tatsuki Yanagawa  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
3rd Author's Name Hiroaki Otsuka  
3rd Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
4th Author's Name Kazuki Komatsu  
4th Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
5th Author's Name Hideyuki Uehara  
5th Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
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Speaker Author-1 
Date Time 2025-05-22 13:40:00 
Presentation Time 25 minutes 
Registration for SeMI 
Paper # SeMI2025-13 
Volume (vol) vol.125 
Number (no) no.29 
Page pp.70-75 
#Pages 6 
Date of Issue 2025-05-14 (SeMI) 

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