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Paper Abstract and Keywords
Presentation 2007-11-27 10:30
[Poster Presentation] A study on soft decision based cooperative sensing in consideration of interference with primary users
Hiromasa Uchiyama, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki (TAT) SR2007-56
Abstract (in Japanese) (See Japanese page) 
(in English) In this report, we propose a soft decision based cooperative sensing in consideration of interference level at primary users in cognitive radio networks. Secondary users which can share the frequency with primary users by sensing a surrounding radio environment can communicate under no interference with primary users. For realizing the frequency sharing system, it is needed that secondary users should avoid interference with primary users. In other words, secondary users should decide whether they interfere with primary users or not correctly. Recently, Cooperative sensing (CS), where multiple secondary users
cooperative each other to achieve higher detection performance, has been investigated. However, the exiting sensing metrics which has been investigated can not ensure the interference level with primary users because of deciding only whether the primary users exist around secondary users or not. Then, we replace the determination whether secondary users interference with primary users or not by the determination whether the signal from primary users is lower than the threshold or not. Through the computer simulation, we have shown that our proposal method can keep the outage probability at a steady value and soft decision based CS can achieve lower PFA of primary users than hard decision based CS.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive radio / Cooperative strategy / Cooperative sensing / Interference / Secondary user / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 352, SR2007-56, pp. 71-76, Nov. 2007.
Paper # SR2007-56 
Date of Issue 2007-11-19 (SR) 
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 SR  
Conference Date 2007-11-26 - 2007-11-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Hirishima international univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Cognitive radio session. panel session and general session 
Paper Information
Registration To SR 
Conference Code 2007-11-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on soft decision based cooperative sensing in consideration of interference with primary users 
Sub Title (in English)  
Keyword(1) Cognitive radio  
Keyword(2) Cooperative strategy  
Keyword(3) Cooperative sensing  
Keyword(4) Interference  
Keyword(5) Secondary user  
1st Author's Name Hiromasa Uchiyama  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TAT)
2nd Author's Name Kenta Umebayashi  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TAT)
3rd Author's Name Yukihiro Kamiya  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (TAT)
4th Author's Name Yasuo Suzuki  
4th Author's Affiliation Tokyo University of Agriculture and Technology (TAT)
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Date Time 2007-11-27 10:30:00 
Presentation Time 90 
Registration for SR 
Paper # IEICE-SR2007-56 
Volume (vol) IEICE-107 
Number (no) no.352 
Page pp.71-76 
#Pages IEICE-6 
Date of Issue IEICE-SR-2007-11-19 

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