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Paper Abstract and Keywords
Presentation 2010-12-17 16:10
Interference Properties of OFDMA Systems under Spectrum Sharing Environment
Yuichiro Fukuda, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTT DOCOMO), Masaharu Hata (Okayama Univ.), Shunji Miura (NTT DOCOMO) RCS2010-198
Abstract (in Japanese) (See Japanese page) 
(in English) This paper evaluates interference reduction effects by transmission power control (TPC) under spectrum sharing environment between different wireless systems in which an OFDMA system is assumed for the interfering system and the power density on a part of the interfering system band is reduced. The results of the computer simulations show that the undesired spectrum regrowth is caused by inter-sub-carrier interference, which results in degradation of interference reduction effects, and it is larger around the both ends of the TPC band. The spectrum regrowth on the TPC band is less than 1dB from the set transmission power density except 16 sub-carriers close to the band with default power density, when the transmission power density of the TPC band is 20 dB below the default density. On the other hand, the spectrum regrowth becomes more than 5 dB even around the center of the TPC band, when the transmission power density is reduced by 40 dB. Moreover, we also clarified the BER performance degradation on the victim system due to the spectrum regrowth.
Keyword (in Japanese) (See Japanese page) 
(in English) Spectrum Sharing / OFDM / OFDMA / Transmission Power Control / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 340, RCS2010-198, pp. 233-238, Dec. 2010.
Paper # RCS2010-198 
Date of Issue 2010-12-09 (RCS) 
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)
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Conference Information
Committee NS RCS  
Conference Date 2010-12-16 - 2010-12-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network 
Paper Information
Registration To RCS 
Conference Code 2010-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Interference Properties of OFDMA Systems under Spectrum Sharing Environment 
Sub Title (in English)  
Keyword(1) Spectrum Sharing  
Keyword(2) OFDM  
Keyword(3) OFDMA  
Keyword(4) Transmission Power Control  
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1st Author's Name Yuichiro Fukuda  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Shigeru Tomisato  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Hiromasa Fujii  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Masaharu Hata  
4th Author's Affiliation Okayama University (Okayama Univ.)
5th Author's Name Shunji Miura  
5th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Speaker Author-1 
Date Time 2010-12-17 16:10:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2010-198 
Volume (vol) vol.110 
Number (no) no.340 
Page pp.233-238 
#Pages 6 
Date of Issue 2010-12-09 (RCS) 

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