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Paper Abstract and Keywords
Presentation 2013-05-24 09:25
Study on Spatial Spectrum Sharing With Imperfect Channel State Information
Samuli Tiiro, Kenta Umebayashi, Yasuo Suzuki (Tokyo Univ. of Agriculture and Tech.) SR2013-9
Abstract (in Japanese) (See Japanese page) 
(in English) Cognitive radio (CR) systems aim for more efficient spectrum utilization by having so called secondary users (SUs)
transmit on a frequency band reserved for licensed primary users (PUs). The secondary transmissions are allowed provided
that no harmful interference will be caused to the PUs. SU terminals with multiple antennas can employ transmit power control
combined with transmit precoding in order to control the interference levels. In most of the existing works, perfect channel state information (CSI) is assumed to be available for the SUs. However, in practical systems where perfect CSI is not available, the SUs are not able to guarantee that the interference constraints are satisfied. In this paper, we investigate the problem of spectrum sharing for multiantenna CR systems with estimated CSI. Due to the random nature of the estimation error, we
set a probabilistic interference constraint and, in order to satisfy it, provide analysis for the interference power statistics. In addition, we present a power control framework for the SU to meet the probabalistic interference constraint.
Keyword (in Japanese) (See Japanese page) 
(in English) cognitive radio / MIMO / spectrum sharing / channel estimation / interference cancellation / power control / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 57, SR2013-9, pp. 41-47, May 2013.
Paper # SR2013-9 
Date of Issue 2013-05-16 (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 SR2013-9

Conference Information
Committee SR  
Conference Date 2013-05-23 - 2013-05-24 
Place (in Japanese) (See Japanese page) 
Place (in English) ASTER PLAZA (Hiroshima City) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) cognitive radio network, heterogeneous network, cross layer radio technologies, etc. 
Paper Information
Registration To SR 
Conference Code 2013-05-SR 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Spatial Spectrum Sharing With Imperfect Channel State Information 
Sub Title (in English)  
Keyword(1) cognitive radio  
Keyword(2) MIMO  
Keyword(3) spectrum sharing  
Keyword(4) channel estimation  
Keyword(5) interference cancellation  
Keyword(6) power control  
Keyword(7)  
Keyword(8)  
1st Author's Name Samuli Tiiro  
1st Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
2nd Author's Name Kenta Umebayashi  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
3rd Author's Name Yasuo Suzuki  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
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Speaker Author-1 
Date Time 2013-05-24 09:25:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2013-9 
Volume (vol) vol.113 
Number (no) no.57 
Page pp.41-47 
#Pages 7 
Date of Issue 2013-05-16 (SR) 

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