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Paper Abstract and Keywords
Presentation 2016-03-03 10:15
Accuracy Improvement for Spectrum Database considering Primary Signal in Time Domain Under Fading Environment
Hao Wang, Koya Sato, Takeo Fujii (UEC) SR2015-99
Abstract (in Japanese) (See Japanese page) 
(in English) Radio Environment Database (RED), as a practical technology to radio propagation estimation, is a promising solution to address the problem of impending spectrum scarcity in spectrum sharing for cognitve radio. A measurement-based RED with high accuracy is proposed with observing spectrum usage status from radio environment by utilizing sensor with mobility vehicle, such as sensor-equipped vehicle and smartphone. In conventional method for RED construction, the activity of primary user is considered to be always ON when the sensor uses the spectrum sensing to calculate the received power at each place. However, a state transition may occur during the sensing period, which leads to a reliability degradation of the RED.
In this paper, an active period detection method of primary signal is proposed. In this method, transition point detection is used to detect a distribution change between ON and OFF state with applying CUSUM (cumulative sum) algorithm, GLR (Generalized Likelihood Ratio) algorithm, which the cumulative sum of log probability density ratio value is calculated to detect the change between two different distribution. Then an active period is extracted by using the detected transition point. In this paper, we focus on the transition point detection performance and received power detection performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive Radio / Radio Environment Database / Transition point Detection / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 473, SR2015-99, pp. 65-70, March 2016.
Paper # SR2015-99 
Date of Issue 2016-02-24 (SR) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Download PDF SR2015-99

Conference Information
Committee RCS CCS SR SRW  
Conference Date 2016-03-02 - 2016-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To SR 
Conference Code 2016-03-RCS-CCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Accuracy Improvement for Spectrum Database considering Primary Signal in Time Domain Under Fading Environment 
Sub Title (in English)  
Keyword(1) Cognitive Radio  
Keyword(2) Radio Environment Database  
Keyword(3) Transition point Detection  
1st Author's Name Hao Wang  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Koya Sato  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Takeo Fujii  
3rd Author's Affiliation The University of Electro-Communications (UEC)
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Date Time 2016-03-03 10:15:00 
Presentation Time 25 
Registration for SR 
Paper # IEICE-SR2015-99 
Volume (vol) IEICE-115 
Number (no) no.473 
Page pp.65-70 
#Pages IEICE-6 
Date of Issue IEICE-SR-2016-02-24 

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