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Paper Abstract and Keywords
Presentation 2008-05-29 13:25
A modulation scheme for a cognitive radio system to overlay on a secondary user
Jun Naganawa, Takaya Yamazato, Masaaki Katayama (Nagoya Univ.) SR2008-2
Abstract (in Japanese) (See Japanese page) 
(in English) As an answer to increasing demands for frequency spectrum, secondary spectrum licensing, in which a secondary wireless system overlays on the frequency band of an existing primary system, is taking attention. In overlay communications, the secondary system is demanded not to be a cause of performance degradation of the primary system, while the primary system does not considers the secondary system.
This manuscript proposes a modulation scheme for such a secondary system. In the proposed scheme, the secondary system modifies its transmitting signal parameters adapting channel states and transmitted signal of the primary system. This set of reference information is also used at the receiver of the secondary system.
We derive the symbol error rates of both the systems analytically, and show that it is possble to realize the communication of the secondary system with the same quality as the primary system, which has any degradation by the signal of the secondary system.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive Radio / Overlay Communication / modulation scheme / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 62, SR2008-2, pp. 5-10, May 2008.
Paper # SR2008-2 
Date of Issue 2008-05-22 (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 2008-05-29 - 2008-05-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokohama National University () 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Panel session, Cognitive radio and general session 
Paper Information
Registration To SR 
Conference Code 2008-05-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A modulation scheme for a cognitive radio system to overlay on a secondary user 
Sub Title (in English)  
Keyword(1) Cognitive Radio  
Keyword(2) Overlay Communication  
Keyword(3) modulation scheme  
1st Author's Name Jun Naganawa  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Takaya Yamazato  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Masaaki Katayama  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
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Date Time 2008-05-29 13:25:00 
Presentation Time 25 
Registration for SR 
Paper # IEICE-SR2008-2 
Volume (vol) IEICE-108 
Number (no) no.62 
Page pp.5-10 
#Pages IEICE-6 
Date of Issue IEICE-SR-2008-05-22 

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