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Paper Abstract and Keywords
Presentation 2011-10-28 10:35
Performance improvement of NLOS detection scheme in TOA-based position estimation with sensor networks
Kazutaka Fukuda, Eiji Okamoto (NIT) USN2011-55
Abstract (in Japanese) (See Japanese page) 
(in English) The sensor network with many small terminals communicating each other can cooperatively collect wider and variety of information and is expected to provide advanced services. To serve such new applications, the position information of targets is essential and the exact localization techniques are necessary. Time of arrival (TOA) localization is one of the popular schemes because of its high estimation accuracy. In TOA scheme, the target node of unknown position sends a signal to the anchor nodes of known position, from the arrival time stamps of the received signal the distance between the target and the anchor nodes is derived, and then, the estimated position is obtained. However, a non-line-of-sight (NLOS) environment between the target and the anchor nodes causes a serious estimation error because the time is delayed more than its true one. Thus, the NLOS nodes should be detected and eliminated for estimation. As a well-known NLOS detection scheme, an iterative minimum residual (IMR) scheme which has low calculation complexity is used for detection. However, the detection error exists in IMR scheme due to the measurement error. Therefore, in this paper, we propose a new IMR-based NLOS detection scheme and show its performance improvement by computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Sensor Networks / TOA-based position estimation system / NLOS environment / IMR method / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 263, USN2011-55, pp. 189-194, Oct. 2011.
Paper # USN2011-55 
Date of Issue 2011-10-19 (USN) 
ISSN Print edition: ISSN 0913-5685    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)
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Conference Information
Committee RCS AN SR USN  
Conference Date 2011-10-26 - 2011-10-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Sophia Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Distributed Networks, etc. 
Paper Information
Registration To USN 
Conference Code 2011-10-RCS-AN-SR-USN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance improvement of NLOS detection scheme in TOA-based position estimation with sensor networks 
Sub Title (in English)  
Keyword(1) Sensor Networks  
Keyword(2) TOA-based position estimation system  
Keyword(3) NLOS environment  
Keyword(4) IMR method  
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1st Author's Name Kazutaka Fukuda  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Eiji Okamoto  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
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Speaker Author-1 
Date Time 2011-10-28 10:35:00 
Presentation Time 25 minutes 
Registration for USN 
Paper # USN2011-55 
Volume (vol) vol.111 
Number (no) no.263 
Page pp.189-194 
#Pages 6 
Date of Issue 2011-10-19 (USN) 

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