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Paper Abstract and Keywords
Presentation 2015-01-29 13:50
Experimental Evaluation of Synchronization Accuracy for QZSS SS-CDMA Short Message Communication
Kohei Akimoto, Yuji Miyake, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi (Tohoku Univ.) SR2014-96
Abstract (in Japanese) (See Japanese page) 
(in English) For realizing a safety confirmation system for disaster utilizing Quasi-Zenith Satellite (QZS), we have proposed spread spectrum code division multiple access (SS-CDMA) system to achieve a direct communication from ground terminals to a satellite.
This method realizes time and frequency synchronization between terminals using a satellite positioning signal to achieve a high density uplink code division multiple access (CDMA).
In this paper, by using a commercially available Global Positioning System (GPS) synchronous oscillator, experimental erification of synchronization accuracy is shown.
SS-CDMA communication system is necessary to verify the synchronization accuracy at different satellite constellation, since the simultaneous transmission from a terminal located in Japan is performed.
In this validation, the number of visible satellites of a plurality of GPS synchronous oscillator is changed, to verify the synchronization error.
As a result, it was shown to be a cumulative distribution function (CDF) 99$ % $ or more with respect to the relative error $ pm $ 20 ns that is the target value of SS-CDMA.
Keyword (in Japanese) (See Japanese page) 
(in English) Quasi-Zenith Satellite (QZS) / Quasi-Zenith Satellite System (QZSS) / spread spectrum (SS) / code division multiple access (CDMA) / SS-CDMA / timing synchronization / experimental verification /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 435, SR2014-96, pp. 13-18, Jan. 2015.
Paper # SR2014-96 
Date of Issue 2015-01-22 (SR) 
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 SR2014-96

Conference Information
Committee SR  
Conference Date 2015-01-29 - 2015-01-30 
Place (in Japanese) (See Japanese page) 
Place (in English) KKR Hakodate 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Cognitive Radio Network, Heterogeneous Network, Cross-layer Radio Technologies, SDN (Software Defined Network), etc. 
Paper Information
Registration To SR 
Conference Code 2015-01-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Evaluation of Synchronization Accuracy for QZSS SS-CDMA Short Message Communication 
Sub Title (in English)  
Keyword(1) Quasi-Zenith Satellite (QZS)  
Keyword(2) Quasi-Zenith Satellite System (QZSS)  
Keyword(3) spread spectrum (SS)  
Keyword(4) code division multiple access (CDMA)  
Keyword(5) SS-CDMA  
Keyword(6) timing synchronization  
Keyword(7) experimental verification  
Keyword(8)  
1st Author's Name Kohei Akimoto  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Yuji Miyake  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Suguru Kameda  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Akinori Taira  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Noriharu Suematsu  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Tadashi Takagi  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
7th Author's Name Kazuo Tsubouchi  
7th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2015-01-29 13:50:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2014-96 
Volume (vol) vol.114 
Number (no) no.435 
Page pp.13-18 
#Pages 6 
Date of Issue 2015-01-22 (SR) 

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