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Paper Abstract and Keywords
Presentation 2011-11-17 11:20
An Integration Method for Wireless Location Using Mobile Phone Built-in Sensors and TDOA Landmarks
Mingmei Li, Kazuyuki Tasaka, Kiyohito Yoshihara (KDDI R&D Labs) IN2011-95
Abstract (in Japanese) (See Japanese page) 
(in English) Non-line-of-sight (NLOS) signal propagation is the major source of error in wireless Time Difference of Arrival (TDOA) indoor system. Even if enough LMs can be deployed by service providers or system designers, the existing methods encounter the location accuracy problem when less line-of-sight (LOS) measurements are detected. In this paper, we propose a new method to integrate the user’s step length into location estimation in wireless TDOA indoor location systems. The proposed method utilizes the user’s step size and counts from mobile phone built-in sensors as reference to detect LOS/NLOS measurements. When less LOS measurements are detected, the previous location and step length are added to the least square (LS) method as a supplementary reference landmark (LM) and distance. Simulations results show that, when less number of hearable LOS measurements is not enough, the user’s location is estimated with the supplementary reference LM and distance. Simulation results show that location error over time is reduced in a wireless TDOA location system, compared with the related works, in which NLOS measurement detections are overestimated or underestimated.
Keyword (in Japanese) (See Japanese page) 
(in English) Non-line-of-sight (NLOS) / Time-difference-of-Arrival (TDOA) / mobile phone built-in sensors / / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 295, IN2011-95, pp. 13-18, Nov. 2011.
Paper # IN2011-95 
Date of Issue 2011-11-10 (IN) 
ISSN Print edition: ISSN 0913-5685    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 MoNA IN  
Conference Date 2011-11-17 - 2011-11-18 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IN 
Conference Code 2011-11-MoMuC-IN 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Integration Method for Wireless Location Using Mobile Phone Built-in Sensors and TDOA Landmarks 
Sub Title (in English)  
Keyword(1) Non-line-of-sight (NLOS)  
Keyword(2) Time-difference-of-Arrival (TDOA)  
Keyword(3) mobile phone built-in sensors  
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1st Author's Name Mingmei Li  
1st Author's Affiliation KDDI R&D Inc. (KDDI R&D Labs)
2nd Author's Name Kazuyuki Tasaka  
2nd Author's Affiliation KDDI R&D Inc. (KDDI R&D Labs)
3rd Author's Name Kiyohito Yoshihara  
3rd Author's Affiliation KDDI R&D Inc. (KDDI R&D Labs)
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Speaker Author-1 
Date Time 2011-11-17 11:20:00 
Presentation Time 25 minutes 
Registration for IN 
Paper # IN2011-95 
Volume (vol) vol.111 
Number (no) no.295 
Page pp.13-18 
#Pages
Date of Issue 2011-11-10 (IN) 


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