KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Optimal Cooperation and Transmission in Cooperative Spectrum Sensing for Cognitive Radio

  • Zhang, Xian (Institute of Communications Engineering, PLA University of Science and Technology) ;
  • Wu, Qihui (Institute of Communications Engineering, PLA University of Science and Technology) ;
  • Li, Xiaoqiang (Institute of Communications Engineering, PLA University of Science and Technology) ;
  • Yun, Zi (PLA Unit of 94860)
  • Received : 2012.09.21
  • Accepted : 2013.01.25
  • Published : 2013.02.28
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Abstract

In this paper, we study the problem of designing the power and number of cooperative node (CN) in the cooperation phase to maximize the average throughput for secondary user (SU), under the constraint of the total cooperation and transmission power. We first investigate the scheme of cooperative spectrum sensing without a separated control channel. Then, we prove that there indeed exist an optimal CN power when the number of CNs is fixed and an optimal CN number when CN power is fixed. The case without the constraints of the power and number of CN is also studied. Finally, numerical results demonstrate the characteristics and existences of optimal CN power and number. Meanwhile, Monte Carlo simulation results match to the theoretical results well.

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