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Paper Abstract and Keywords
Presentation 2009-10-16 13:00
[Poster Presentation] Simple Radio Positioning System Based on LF Direct Sequence Spread Spectrum Signals and Loop Antenna Array
Shinichi Watanabe, Masato Saito, Minoru Okada (NAIST) WBS2009-32
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. 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. Here, the antennas have a common axis. With the antenna coordination, it can identify the region where the receiver exists based on the inner product. Numerical results show that the inner product can be useful to detect the region where the receiver belongs.
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. 109, no. 233, WBS2009-32, pp. 43-47, Oct. 2009.
Paper # WBS2009-32 
Date of Issue 2009-10-09 (WBS) 
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 WBS  
Conference Date 2009-10-16 - 2009-10-16 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To WBS 
Conference Code 2009-10-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Simple Radio Positioning System Based on LF Direct Sequence Spread Spectrum Signals and 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 Masato Saito  
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 2009-10-16 13:00:00 
Presentation Time 180 minutes 
Registration for WBS 
Paper # WBS2009-32 
Volume (vol) vol.109 
Number (no) no.233 
Page pp.43-47 
Date of Issue 2009-10-09 (WBS) 

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