Cooperative TV spectrum sensing in cognitive radio for Wi-Fi networks

Chongjoon You, Hongkyu Kwon, Jun Heo

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


This paper presents cooperative spectrum sensing techniques for cognitive radio (CR) systems. The spectrum sensing detects the presence of a primary user (service) on an associated spectrum. The accuracy of spectrum sensing depends on both sensing time and number of sensing nodes (i.e. secondary users) participating in the sensing process. We derive optimal number of secondary users for cooperative spectrum sensing to minimize spectrum detection error probability and optimal spectrum sensing time to maximize data transmission throughput. A system model which consists of a primary TV spectrum and multiple Wi-Fi secondary users is considered. The proposed CR scheme can solve recent spectrum shortage problem in Wi-Fi networks due to traffic explosion by smart phones. We propose K-out-of-N-rule which is the most efficient cooperative sensing rule by analytical and numerical results.

Original languageEnglish
Article number5735482
Pages (from-to)62-67
Number of pages6
JournalIEEE Transactions on Consumer Electronics
Issue number1
Publication statusPublished - 2011 Feb

Bibliographical note

Funding Information:
Funding for this paper was provided by Namseoul university. Chongjoon You and Jun Heo (corresponding author email: are with the School of Electrical Engineering, Korea


  • Cognitive radio
  • Cooperative spectrum sensing
  • K-out-of-N-rule
  • TV spectrum
  • Wi-Fi

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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