Optimization of time-domain spectrum sensing for cognitive radio systems

Sunyoung Lee, Seong Lyun Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)


Spectrum sensing is a critical issue in a cognitive radio (CR). In this paper, we propose a novel spectrum-sensing algorithm that exploits the time diversity of sensing results generated by a CR spectrum sensor. In the proposed algorithm, the CR sensor combines multiple sensing results obtained at different time points to make an optimal decision on the existence of spectrum access opportunity. It considers the traffic pattern of the primary user and maximizes the spectrum utilization of the CR, given the allowable interference level to the primary user. From our mathematical analysis, the principles of combining multiple sensing results in the time domain are revealed, and the detection and the false alarm probabilities are derived.

Original languageEnglish
Article number5762396
Pages (from-to)1937-1943
Number of pages7
JournalIEEE Transactions on Vehicular Technology
Issue number4
Publication statusPublished - 2011 May 1

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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