Study on Soft Decision Based Cooperative Sensing for Cognitive Radio Networks
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概要
- 論文の詳細を見る
In this paper, we propose a soft decision based cooperative sensing method for cognitive radio (CR) networks for opportunistic frequency usage. To identify unused frequency, CR should exploit sensing technique to detect presence or absence of primary user and use this information to opportunistically provide communication among secondary users while performance of primary user should not be deteriorated by the secondary users. Because of multipath fading or shadowing, the detection of primary users may be significantly difficult. For this problem, cooperative sensing (CS), where gathered observations obtained by multiple secondary users is utilized to achieve higher performance of detection, has been investigated. We design a soft decision based CS analytically and analyze the detector in several situations, i. e., signal model where single-carrier case and multi-carrier case are assumed and two scenarios; in the first scenario, SNR values of secondary users are totally equal and in the second scenario, a certain SNR difference between secondary users is assumed. We present numerical results as follows. The first scenario shows that there is little difference between the signal models in terms of detection performance. The second scenario shows that CS is superior to non-cooperative sensing. In addition, we presents that detection performance of soft decision based CS outperform detection performance of hard decision based CS.
- （社）電子情報通信学会の論文
- 2008-01-01
著者
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Fujii Takeo
Advanced Wireless Communication Research Center, The University of Electro-Communications, Japan
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Fujii Takeo
Advanced Wireless Communication Research Center The University Of Electro-communications Japan
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Fujii Takeo
Advance Wireless Communication Research Center (awcc) University Of Electro-communications
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SAKAGUCHI Kei
Graduate School of Science and Engineering, Tokyo Institute of Technology
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Kamiya Yukihiro
Graduate School Of Engineering Tokyo University Of Agriculture And Technology
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Ono Fumie
Graduate School Of Engineering Division Of Electrical And Computer Engineering Yokohama National Uni
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UMEBAYASHI Kenta
Graduate School of Engineering, Division of Physics, Electrical and Computer Engineering, Yokohama N
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Sakaguchi Kei
Graduate School Of Engineering Tokyo Institute Of Technology
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SUZUKI Yasuo
Graduate School of Engineering, Tokyo University of Agriculture and Technology
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UCHIYAMA Hiromasa
Graduate School of Engineering, Tokyo University of Agriculture and Technology
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Fujii Takeo
The University Of Electromagnetic Communication
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Fujii Takeo
Univ. Electro‐communications Chofu‐shi Jpn
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Suzuki Yasuo
Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture
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Umebayashi Kenta
Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture
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Uchiyama Hiromasa
Graduate School Of Engineering Tokyo University Of Agriculture And Technology
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UMEBAYASHI Kenta
Suzuki Laboratory, Tokyo University of Agriculture and Technology (TUAT)
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Umebayashi Kenta
Graduate School Of Engineering Division Of Physics Electrical And Computer Engineering Yokohama Nati
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Umebayashi Kenta
Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture
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Fujii Takeo
Advanced Wireless Communication Research Center (awcc) The University Of Electro-communications
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Suzuki Yasuo
Graduate School Of Engineering Tokyo University Of Agriculture And Technology (tuat)
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