KSII Transactions on Internet and Information Systems (TIIS)

  • 제11권3호
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  • Pages.1279-1300
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  • 2017
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  • 1976-7277(pISSN)
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  • 1976-7277(eISSN)
한국인터넷정보학회 (Korean Society for Internet Information)
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Adaptive Cooperation for Bidirectional Communication in Cognitive Radio Networks

  • Gao, Yuan (Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Hohai University) ;
  • Zhu, Changping (Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Hohai University) ;
  • Deng, Zhixiang (Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Hohai University) ;
  • Tang, Yibin (Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Hohai University)
  • 투고 : 2016.07.31
  • 심사 : 2017.01.15
  • 발행 : 2017.03.31
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초록

In the interweave cognitive networks, the interference from the primary user degrades the performance of the cognitive user transmissions. In this paper, we propose an adaptive cooperation scheme in the interweave cognitive networks to improve the performance of the cognitive user transmissions. In the proposed scheme for the bidirectional communication of two end-source cognitive users, the bidirectional communication is completed through the non-relay direct transmission, the one-way relaying cooperation transmission, and the two-way relaying cooperation transmission depending on the limited feedback from the end-sources. For the performance analysis of the proposed scheme, we derive the outage probability and the finite-SNR diversity multiplexing tradeoff (f-DMT) in a closed form, considering the imperfect spectrum sensing, the interference from the primary user, and the power allocation between the relay and the end-sources. The results show that compared with the direct transmissions (DT), the pure one-way relaying transmissions (POWRT), and the pure two-way relaying transmissions (PTWRT), the proposed scheme has better outage performance. In terms of the f-DMT, the proposed scheme outperforms the full cooperation transmissions of the POWRT and PTWRT.

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참고문헌

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