Optimization of cooperative spectrum sensing with energy detection in cognitive radio networks

Wei Zhang, Ranjan K. Mallik, Khaled Ben Letaief

Research output: Contribution to journalArticle

579 Citations (Scopus)


We consider cooperative spectrum sensing in which multiple cognitive radios collaboratively detect the spectrum holes through energy detection and investigate the optimality of cooperative spectrum sensing with an aim to optimize the detection performance in an efficient and implementable way. We derive the optimal voting rule for any detector applied to cooperative spectrum sensing. We also optimize the detection threshold when energy detection is employed. Finally, we propose a fast spectrum sensing algorithm for a large network which requires fewer than the total number of cognitive radios in cooperative spectrum sensing while satisfying a given error bound.

Original languageEnglish
Article number5351690
Pages (from-to)5761-5766
Number of pages6
JournalIEEE Transactions on Wireless Communications
Issue number12
Publication statusPublished - 1 Dec 2009



  • Cognitive radio
  • Energy detection
  • Optimization
  • Spectrum sensing

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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