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Paper Abstract and Keywords
Presentation 2013-01-25 14:30
Optimization of Viterbi decoding employing a heterogeneous cognitive radio for public mobile communication systems
Masafumi Moriyama, Takeo Fujii (UEC) SR2012-84
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, to improve reliability and to complement no service area of public mobile communication systems (PMCS) using a large zone scheme, we consider combining the PMCS with commercial systems such as cellular systems based on techniques of heterogeneous cognitive radio. The aim of this cognitive radio improves bit error rate (BER) by getting auxiliary information from the commercial systems when quality of PMCS is poor at mobile station. Since PMCS use convolutional code for Forward Error Correction (FEC), we deal with the methods which apply the auxiliary information to Viterbi decoding of a convolutional code in PMCS. Two methods named replacing method and adding method are proposed in this paper. Distance spectrum is often used to evaluate capability of convolutional code. In this paper, we show methods to compute the distance spectrum applying a replacing method and an adding method. Moreover, theoretical BER is calculated by using the distance spectrum. We confirmed that this theoretical BER accorded closely with BER estimated by computer simulation in large signal power to noise power ratio (SNR).
Keyword (in Japanese) (See Japanese page) 
(in English) Public mobile communication systems / Cognitive radio / convolutional code / Viterbi decoding / Distance Spectrum / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 407, SR2012-84, pp. 79-86, Jan. 2013.
Paper # SR2012-84 
Date of Issue 2013-01-17 (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 SR2012-84

Conference Information
Committee SR  
Conference Date 2013-01-24 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Shinshu Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) cognitive radio network, cross layer technology (international workshop) 
Paper Information
Registration To SR 
Conference Code 2013-01-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization of Viterbi decoding employing a heterogeneous cognitive radio for public mobile communication systems 
Sub Title (in English)  
Keyword(1) Public mobile communication systems  
Keyword(2) Cognitive radio  
Keyword(3) convolutional code  
Keyword(4) Viterbi decoding  
Keyword(5) Distance Spectrum  
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1st Author's Name Masafumi Moriyama  
1st Author's Affiliation University of Electro-Communications (UEC)
2nd Author's Name Takeo Fujii  
2nd Author's Affiliation University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2013-01-25 14:30:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2012-84 
Volume (vol) vol.112 
Number (no) no.407 
Page pp.79-86 
#Pages 8 
Date of Issue 2013-01-17 (SR) 

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