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Paper Abstract and Keywords
Presentation 2013-01-29 14:55
Performance Evaluation of Spreading Codes with Negative Auto-Correlation Based on Gold Sequences and Chaos Theory -- BER in Asynchronous DS/CDMA Communications under AWGN Environment --
Satoshi Abe, Akio Tsuneda (Kumamoto Univ.) CAS2012-87
Abstract (in Japanese) (See Japanese page) 
(in English) In asynchronous DS/CDMA communications, spreading codes with appropriate negative auto-correlation can reduce bit error rate (BER) compared with the conventional Gold sequences generated by linear feedback shift registers (LFSRs). Such negatively auto-correlated spreading codes can be generated by 1-dimensional chaotic maps but the code generators, in general, are more complex and expensive than the conventional linear feedback shift registers (LFSRs). We proposed design methods of spreading codes with negative auto-correlation based on Gold sequences and the chaos theory for the Bernoulli map. By computer simulations of asynchronous DS/CDMA communications, we showed that the proposed sequences can reduce the BER compared with the original Gold sequences. In this paper, we evaluate the BER performance of the proposed spreading codes with negative auto-correlation in asynchronous DS/CDMA communications under additive white Gaussian noise (AWGN) environment.
Keyword (in Japanese) (See Japanese page) 
(in English) Spreading code / CDMA / negative correlation / BER / AWGN / Gold sequence / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 418, CAS2012-87, pp. 121-124, Jan. 2013.
Paper # CAS2012-87 
Date of Issue 2013-01-21 (CAS) 
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 CAS  
Conference Date 2013-01-28 - 2013-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Beppu International Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To CAS 
Conference Code 2013-01-CAS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance Evaluation of Spreading Codes with Negative Auto-Correlation Based on Gold Sequences and Chaos Theory 
Sub Title (in English) BER in Asynchronous DS/CDMA Communications under AWGN Environment 
Keyword(1) Spreading code  
Keyword(2) CDMA  
Keyword(3) negative correlation  
Keyword(4) BER  
Keyword(5) AWGN  
Keyword(6) Gold sequence  
1st Author's Name Satoshi Abe  
1st Author's Affiliation Kumamoto University (Kumamoto Univ.)
2nd Author's Name Akio Tsuneda  
2nd Author's Affiliation Kumamoto University (Kumamoto Univ.)
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Date Time 2013-01-29 14:55:00 
Presentation Time 20 
Registration for CAS 
Paper # IEICE-CAS2012-87 
Volume (vol) IEICE-112 
Number (no) no.418 
Page pp.121-124 
#Pages IEICE-4 
Date of Issue IEICE-CAS-2013-01-21 

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