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Paper Abstract and Keywords
Presentation 2009-07-30 11:45
Transmission Schemes of Cognitive Radio System with Power Control over Rayleigh Fading
Chen Sun, Yohannes D. Alemseged, Ha Nguyen Tran, Hiroshi Harada (NICT) SR2009-43
Abstract (in Japanese) (See Japanese page) 
(in English) This paper addresses the transmission schemes of cognitive radio system (CRS) with power control. An adaptive power control scheme in Rayleigh fading channel is proposed. The transmit power of a secondary user (SU) is adjusted in Rayleigh fading to maximize the constant output signal-to-noise ratio (SNR) at an SU receiver while keeping the interference to a primary user (PU) under given constraints. To calculate the maximum constant output SNR at the SU receiver under the interference constraints of the PUs, we develop an analytical model for the distribution of the interference to PUs while considering the detection performance at the SUs. The analytical model takes into account of the use of multiple antennas and includes a single antenna scenario as a special case. The CRS
transmission with the proposed adaptive power control scheme is compared with the transmission using a straightforward fixed power control scheme for the CRS in terms of bit-error-rate (BER). Results show that the proposed adaptive power control scheme outperforms the fixed power control
scheme. For example, when the BER is 0.001 the adaptive power control scheme with two transmit antennas and two receive antennas has a 3-dB improvement in SNR as compared with the fixed power control scheme.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive radio / power control / interference constraint / spectrum sensing / energy detection / selective sensing / Rayleigh fading / maximum ratio combining (MRC)  
Reference Info. IEICE Tech. Rep., vol. 109, no. 155, SR2009-43, pp. 131-138, July 2009.
Paper # SR2009-43 
Date of Issue 2009-07-22 (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 SR2009-43

Conference Information
Committee SR  
Conference Date 2009-07-29 - 2009-07-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo institute of technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Exibition, reconfigurable hardware, and 10th anniversary ceremony 
Paper Information
Registration To SR 
Conference Code 2009-07-SR 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Transmission Schemes of Cognitive Radio System with Power Control over Rayleigh Fading 
Sub Title (in English)  
Keyword(1) Cognitive radio  
Keyword(2) power control  
Keyword(3) interference constraint  
Keyword(4) spectrum sensing  
Keyword(5) energy detection  
Keyword(6) selective sensing  
Keyword(7) Rayleigh fading  
Keyword(8) maximum ratio combining (MRC)  
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 2009-07-30 11:45:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2009-43 
Volume (vol) vol.109 
Number (no) no.155 
Page pp.131-138 
#Pages 8 
Date of Issue 2009-07-22 (SR) 

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