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Paper Abstract and Keywords
Presentation 2014-10-31 13:00
[Technology Exhibit] Development of a measurement system for spectrum awareness -- Duty estimation based on Welch-FFT --
Hiroki Iwata, Kenta Umebayashi, Riki Mizuchi, Tatsuya Maruyama, Kazuki Moriwaki, Samuli Tiiro (TUAT), Janne Lehtomaki (Univ. of Oulu), Yasuo Suzuki (TUAT) SR2014-89
Abstract (in Japanese) (See Japanese page) 
(in English) To resolve the spectrum scarcity problem, dynamic spectrum access (DSA) has been investigated recently. In DSA, an unlicensed user (secondary user : SU) can opportunistically access the unused spectrum (White Space : WS) owned by the licensed user (primary user : PU) while mitigating harmful interference from SU to PU. Key technique in DSA is spectrum sensing which is used to detect WS. However, implementing spectrum sensing in practice with reasonably low cost is very challenging due to the required detection accuracy and quickness. One possible approach to achieve the requirements is to use statistics regarding PU spectrum utilization in spectrum sensing. For this issue, it is necessary to develop a system for obtaining the statistical information, such as Duty Cycle (DC). In our previous work, DC estimation based on Welch-FFT has been investigated. In the DC estimation method, there is a trade-off relationship between DC estimation accuracy and WS detection accuracy with regard to the segment size of Welch-FFT. In this paper, we de ne the evaluation criteria for DC estimation accuracy and WS detection accuracy and provide the segment size design guideline in terms of DSA.
Keyword (in Japanese) (See Japanese page) 
(in English) Dynamic spectrum access / Spectrum measurement / Duty Cycle / Welch FFT / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 284, SR2014-89, pp. 171-177, Oct. 2014.
Paper # SR2014-89 
Date of Issue 2014-10-23 (SR) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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 SR  
Conference Date 2014-10-30 - 2014-10-31 
Place (in Japanese) (See Japanese page) 
Place (in English) I2R, Singapore 
Topics (in Japanese) (See Japanese page) 
Topics (in English) International Workshop (SmartCom 2014) 
Paper Information
Registration To SR 
Conference Code 2014-10-SR 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of a measurement system for spectrum awareness 
Sub Title (in English) Duty estimation based on Welch-FFT 
Keyword(1) Dynamic spectrum access  
Keyword(2) Spectrum measurement  
Keyword(3) Duty Cycle  
Keyword(4) Welch FFT  
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1st Author's Name Hiroki Iwata  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
2nd Author's Name Kenta Umebayashi  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
3rd Author's Name Riki Mizuchi  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
4th Author's Name Tatsuya Maruyama  
4th Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
5th Author's Name Kazuki Moriwaki  
5th Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
6th Author's Name Samuli Tiiro  
6th Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
7th Author's Name Janne Lehtomaki  
7th Author's Affiliation University of Oulu (Univ. of Oulu)
8th Author's Name Yasuo Suzuki  
8th Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
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Speaker Author-1 
Date Time 2014-10-31 13:00:00 
Presentation Time 120 minutes 
Registration for SR 
Paper # SR2014-89 
Volume (vol) vol.114 
Number (no) no.284 
Page pp.171-177 
#Pages 7 
Date of Issue 2014-10-23 (SR) 

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