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Paper Abstract and Keywords
Presentation 2025-09-18 16:45
A Study On Dynamic Selection of Measured Distances for Indoor Positioning Using TOA Based on FTM
Kippei Arai, Masahiro Fujii (Utsunomiya Univ.) ITS2025-8
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we performed ranging using the FTM (Fine Timing Measurement) protocol. Some of the obtained ranging values are dropped out, and localization is performed using the remaining values. We propose two dropout methods: Static Dropout, in which the number of values to be dropped is fixed in advance, and Dynamic Dropout, in which the number is determined dynamically. In Dynamic Dropout, the triangle inequality and its inverse are applied based on the triangle formed by the transmitter and receivers. Localization experiments using Maximum Likelihood Estimation and lateration show that applying Dynamic Dropout results in the best accuracy in both methods. Furthermore, Dynamic Dropout appropriately drop ranging values with large errors.
Keyword (in Japanese) (See Japanese page) 
(in English) FTM / NLOS / multipath / Dropout / triangle inequality / inverse triangle inequality / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 183, ITS2025-8, pp. 13-18, Sept. 2025.
Paper # ITS2025-8 
Date of Issue 2025-09-11 (ITS) 
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 ITS2025-8

Conference Information
Committee ITS IPSJ-ITS IEE-ITS  
Conference Date 2025-09-18 - 2025-09-19 
Place (in Japanese) (See Japanese page) 
Place (in English) CRANTS Gunma Univ. (in Aramaki) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ITS 
Conference Code 2025-09-ITS-ITS-ITS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study On Dynamic Selection of Measured Distances for Indoor Positioning Using TOA Based on FTM 
Sub Title (in English)  
Keyword(1) FTM  
Keyword(2) NLOS  
Keyword(3) multipath  
Keyword(4) Dropout  
Keyword(5) triangle inequality  
Keyword(6) inverse triangle inequality  
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Keyword(8)  
1st Author's Name Kippei Arai  
1st Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
2nd Author's Name Masahiro Fujii  
2nd Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
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Speaker Author-1 
Date Time 2025-09-18 16:45:00 
Presentation Time 25 minutes 
Registration for ITS 
Paper # ITS2025-8 
Volume (vol) vol.125 
Number (no) no.183 
Page pp.13-18 
#Pages 6 
Date of Issue 2025-09-11 (ITS) 

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