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Paper Abstract and Keywords
Presentation 2014-01-22 16:20
Searching for Two-dimensional Spreading Codes to Improve the Synchronization Performance of Time and Frequency Spread Spectrum System
Hisashi Watanabe, Hiroyuki Yasuda, Mikio Hasegawa (Tokyo Univ. of Science) NLP2013-162
Abstract (in Japanese) (See Japanese page) 
(in English) In the chaos CDMA, it has been showed that negative autocorrelation and the Gaussian waveform is valid in the time domain spreading codes. Extended CDMA, Gabor Division/ Spread Spectrum System (GD/SSS) is proposed which have spreading codes in both of time domain and frequency domain. By both domains spreading, it can be achieved the more robust synchronization system. There are two correlators in GD/SSS in order to achieve synchronization in both domains. They need to have the correlation property with synchronization easily. In this paper, we optimized spreading codes to become the correlation properties which are suitable for the synchronization. We have searched the spreading codes by an approximate method because the combination of the spreading code becomes huge. In results, we show that the correlation properties are improved by using the codes obtained by search, and the optimal spreading codes that improve synchronization performance exists.
Keyword (in Japanese) (See Japanese page) 
(in English) GD/SSS / Spreading Spectrum System / Spreading code / Synchronization / Searching / approximate method / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 383, NLP2013-162, pp. 173-176, Jan. 2014.
Paper # NLP2013-162 
Date of Issue 2014-01-14 (NLP) 
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 NLP  
Conference Date 2014-01-21 - 2014-01-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Niseko Park Hotel 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NLP 
Conference Code 2014-01-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Searching for Two-dimensional Spreading Codes to Improve the Synchronization Performance of Time and Frequency Spread Spectrum System 
Sub Title (in English)  
Keyword(1) GD/SSS  
Keyword(2) Spreading Spectrum System  
Keyword(3) Spreading code  
Keyword(4) Synchronization  
Keyword(5) Searching  
Keyword(6) approximate method  
Keyword(7)  
Keyword(8)  
1st Author's Name Hisashi Watanabe  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Hiroyuki Yasuda  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Mikio Hasegawa  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2014-01-22 16:20:00 
Presentation Time 20 minutes 
Registration for NLP 
Paper # NLP2013-162 
Volume (vol) vol.113 
Number (no) no.383 
Page pp.173-176 
#Pages 4 
Date of Issue 2014-01-14 (NLP) 

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