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Paper Abstract and Keywords
Presentation 2010-03-03 16:40
Optimization of Transmit Power and Time Slot for Multiple Secondary Users in Cognitive Radio System
Chen Sun, Yohannes D. Alemseged, Ha Nguyen Tran, Hiroshi Harada (NICT) SR2009-101
Abstract (in Japanese) (See Japanese page) 
(in English) This paper addresses the issues of coexistence for cognitive radio networks. The coexistence consideredinclude the coexistence between primary users (PUs) and secondary users (SUs), as well as the coexistence amongSUs. The coexistence issue addresses the sharing of identified spectrum opportunity among SUs. The coexistence　issue between SUs and PUs addresses the interference from SUs to PUs. In our previous study, we have introduce　the a new parameter named as quality of coexistence (QoC), which is defined as the quality of SU transmission　divided by the negative interference to PUs. Assuming the a time slot of spectrum opportunity has been found　by multiple SUs, we partition this time slot to multiple SUs to maximize the QoC. This leads to a good spectrum
usage among SUs and minimized interference to PUs. In this study we assume that the SUs have multiple antennas　and employ fixed transmit power control (fixed-TPC). A procedure for time slot allocation among SU is proposed.　Further, by using the approximation of the approximation to the distribution of weighted sum of chi-square random　variable (RV) we develop the analytical model for the time slot allocation among SUs. Results show that the the　transmit power and time slot can be allocated to achieve the maximum QoC. In a particular scenario the QoC can
be increased by 60%.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive radio / coexistence / power control / interference constraint / database / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 442, SR2009-101, pp. 73-78, March 2010.
Paper # SR2009-101 
Date of Issue 2010-02-24 (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 SR2009-101

Conference Information
Committee RCS AN MoNA SR  
Conference Date 2010-03-03 - 2010-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To SR 
Conference Code 2010-03-RCS-AN-MoMuC-SR 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization of Transmit Power and Time Slot for Multiple Secondary Users in Cognitive Radio System 
Sub Title (in English)  
Keyword(1) Cognitive radio  
Keyword(2) coexistence  
Keyword(3) power control  
Keyword(4) interference constraint  
Keyword(5) database  
Keyword(6)  
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1st Author's Name Chen Sun  
1st Author's Affiliation National Institute of Information and Communications Technology (NICT)
2nd Author's Name Yohannes D. Alemseged  
2nd Author's Affiliation National Institute of Information and Communications Technology (NICT)
3rd Author's Name Ha Nguyen Tran  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
4th Author's Name Hiroshi Harada  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2010-03-03 16:40:00 
Presentation Time 20 minutes 
Registration for SR 
Paper # SR2009-101 
Volume (vol) vol.109 
Number (no) no.442 
Page pp.73-78 
#Pages 6 
Date of Issue 2010-02-24 (SR) 

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