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Paper Abstract and Keywords
Presentation 2010-03-05 16:40
An Indoor Localization in NLOS Environments Using Outlier Detection Based on Grouping of Sensors for Sensor Networks
Yusuke Nishi, Tomoaki Ohtsuki (Keio Univ.) RCS2009-339
Abstract (in Japanese) (See Japanese page) 
(in English) One of major localization algorithms uses Received Signal Strength Indicator (RSSI).
A troublesome problem in indoor RSSI based localization is NLOS (Non Line of Sight) environments.In NLOS environments, RSSI becomes smaller than actual value and the location estimation accuracy degrades.In most of the current indoor localizations using RSSI, it is necessary to obtain a radio propagation characteristic by prior measurements of relations between RSSI and a distance. These prior experiments are not favorable, because measurements at every place take a lot of cost and time. To prevent cumbersome measurements, we previously proposed a localization algorithm that estimates the parameters of a radio propagation characteristic besides a source location.This algorithm has no need to measure a radio propagation characteristics, because it estimates the parameters of a radio propagation characteristic.However, this algorithm does not mitigate the influences of NLOS environments.In this research, we propose an RSSI based localization without prior measurements in NLOS environments.This algorithm uses grouping of sensor nodes and sets threshold to RSSI of each group to distinguish NLOS sensor nodes by the sensor groups. We evaluate a calculation amount and location estimation accuracies of the proposed algorithm by computer simulations and experiments.
Keyword (in Japanese) (See Japanese page) 
(in English) Sensor Networks / Localization / Received Signal Energy / RSSI / Non Line of Sight / NLOS / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 440, RCS2009-339, pp. 479-484, March 2010.
Paper # RCS2009-339 
Date of Issue 2010-02-24 (RCS) 
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)
Download PDF RCS2009-339

Conference Information
Committee RCS AN MoNA SR  
Conference Date 2010-03-03 - 2010-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2010-03-RCS-AN-MoMuC-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Indoor Localization in NLOS Environments Using Outlier Detection Based on Grouping of Sensors for Sensor Networks 
Sub Title (in English)  
Keyword(1) Sensor Networks  
Keyword(2) Localization  
Keyword(3) Received Signal Energy  
Keyword(4) RSSI  
Keyword(5) Non Line of Sight  
Keyword(6) NLOS  
Keyword(7)  
Keyword(8)  
1st Author's Name Yusuke Nishi  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Tomoaki Ohtsuki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2010-03-05 16:40:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-339 
Volume (vol) vol.109 
Number (no) no.440 
Page pp.479-484 
#Pages 6 
Date of Issue 2010-02-24 (RCS) 

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