Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Log-Average-SNR Ratio and Cooperative Spectrum Sensing

  • Yue, Dian-Wu (College of Information Science and Technology, Dalian Maritime University) ;
  • Lau, Francis C.M. (Department of Electronic and Information Engineering, The Hong Kong Polytechnic University) ;
  • Wang, Qian (Department of Electrical and Computer Systems Engineering, Monash University)
  • Received : 2014.09.17
  • Accepted : 2015.06.12
  • Published : 2016.06.30
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Abstract

In this paper, we analyze the spectrum-sensing performance of a cooperative cognitive radio (CR) network consisting of a number of CR nodes and a fusion center (FC). We introduce the "log-average-SNR ratio" that relates the average SNR of the CR-node-FC link and that of the primary-user-CR-node link. Assuming that the FC utilizes the K-out-of-N rule as its decision rule, we derive exact expressions for the sensing gain and the coding gain - parameters used to characterize the CR network performance at the high SNR region. Based on these results, we determine ways to optimize the performance of the CR network.

Keywords

Acknowledgement

Supported by : Central Universities, Hangzhou Dianzi University

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