Opportunistic spectrum access in cognitive radio networks under imperfect spectrum sensing

O. Altrad, S. Muhaidat, A. Al-Dweik, A. Shami, P. D. Yoo

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


In this paper, we investigate the effect of imperfect sensing on the performance of opportunistic spectrum access (OSA) in cognitive radio (CR) networks. We consider a system modeled as a continuous-time Markov chain (CTMC), and then evaluate its performance in terms of the probabilities of users being blocked or dropped. Our results demonstrate that the performance of the underlying system significantly degrades when imperfect sensing is considered; thus, there is a pressing need for a reliable spectrum sensing scheme to improve the overall quality of service in practical scenarios. A simulation study is presented to corroborate the analytical results and to demonstrate the performance of OSA under imperfect sensing conditions.

Original languageBritish English
Article number6595161
Pages (from-to)920-925
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Issue number2
StatePublished - Feb 2014


  • Access control
  • cognitive radio (CR)
  • continuous-time Markov chain (CTMC)
  • spectrum management
  • spectrum sensing
  • utilization


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