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Paper Abstract and Keywords
Presentation 2013-12-19 09:00
A Study on Optimization of Reciever Filter of Nallowband DS-CDM Transmission System
Naoki Oyama, Makoto Taromaru (Fukuoka Univ.) RCS2013-223
Abstract (in Japanese) (See Japanese page) 
(in English) Even when using spread spectrum (SS) modulation for a radio communication system, we have take into account the occupied frequency bandwidth due to the regulations or the standard it conforms to; therefore we have to bandlimit the SS transmission signal with a filter in some cases. We evaluated bit error rate (BER) performance due to additive white Gaussian
noise (AWGN) of the nallowbanded DS-SS transmission system using Gaussian filter. Our computer simulation showed that the BER performance was just 1dB degraded from that of NRZ-pulse spreading without bandlimitation. However, the matched filter for the bandlimiting Gaussian filter is not optimum for AWGN channel any more in this case because a Gaussian filter
causes intersymbol interference. It doesn't satisfy Nyquist first criterion. If we make the bandwidth of the filter at the receiver side a little wider than the matched filter, the ISI must be reduced and BER is expected to be reduced. In this study, we evaluated the BER performance and studied the effect of the bandwidth of the receiver side.
Keyword (in Japanese) (See Japanese page) 
(in English) Spreading code / M-sequence / Correlation coefficient / DS-CDM / Gaussian filter / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 361, RCS2013-223, pp. 101-105, Dec. 2013.
Paper # RCS2013-223 
Date of Issue 2013-12-11 (RCS) 
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)
Download PDF RCS2013-223

Conference Information
Committee RCS NS  
Conference Date 2013-12-18 - 2013-12-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Sunport Hall Takamatsu 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network 
Paper Information
Registration To RCS 
Conference Code 2013-12-RCS-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Optimization of Reciever Filter of Nallowband DS-CDM Transmission System 
Sub Title (in English)  
Keyword(1) Spreading code  
Keyword(2) M-sequence  
Keyword(3) Correlation coefficient  
Keyword(4) DS-CDM  
Keyword(5) Gaussian filter  
1st Author's Name Naoki Oyama  
1st Author's Affiliation Fukuoka University (Fukuoka Univ.)
2nd Author's Name Makoto Taromaru  
2nd Author's Affiliation Fukuoka University (Fukuoka Univ.)
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Date Time 2013-12-19 09:00:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2013-223 
Volume (vol) IEICE-113 
Number (no) no.361 
Page pp.101-105 
#Pages IEICE-5 
Date of Issue IEICE-RCS-2013-12-11 

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