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Paper Abstract and Keywords
Presentation 2010-12-02 14:55
Low Frequency Radio Positioning System using Direct Sequency Spread Spectrum with Loop Antenna Array
Shinichi Watanabe, Ryusuke Miyamoto, Minoru Okada (NAIST) SIS2010-44
Abstract (in Japanese) (See Japanese page) 
(in English) Systems with location-aware technique have been attracted recently. Not all of them need to know the
location of receivers precisely. A small receiver is desired to be identified its position by simple examination because
its size is restricted. This paper proposes a simple positioning method for small devices based on Direct-Sequence Spread Spectrum (DS/SS) signals only to identify a region where the device exists. To develop a small receiver, we employ Low Frequency (LF) signals and magneticfields as communication medium. The proposed scheme measures the sign of inner product between reference signals from a loop antenna and the delayed signal from double loop antenna. A loop antenna array detects which the receiver exist in two region in conventional research. Numerical results show that a number of loop antenna array can detect that the receiver exist in a square which is 4 meter on a side enclosed with the antenna array or not with high probability.
Keyword (in Japanese) (See Japanese page) 
(in English) Extended M-sequence / Loop antenna arrays / Magnetic fields / Correlation / Position identification / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 322, SIS2010-44, pp. 53-57, Dec. 2010.
Paper # SIS2010-44 
Date of Issue 2010-11-25 (SIS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 SIS  
Conference Date 2010-12-02 - 2010-12-03 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To SIS 
Conference Code 2010-12-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Low Frequency Radio Positioning System using Direct Sequency Spread Spectrum with Loop Antenna Array 
Sub Title (in English)  
Keyword(1) Extended M-sequence  
Keyword(2) Loop antenna arrays  
Keyword(3) Magnetic fields  
Keyword(4) Correlation  
Keyword(5) Position identification  
1st Author's Name Shinichi Watanabe  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Ryusuke Miyamoto  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Minoru Okada  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2010-12-02 14:55:00 
Presentation Time 20 minutes 
Registration for SIS 
Paper # SIS2010-44 
Volume (vol) vol.110 
Number (no) no.322 
Page pp.53-57 
Date of Issue 2010-11-25 (SIS) 

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