Acta Metallurgica Sinica(English letters) ›› 2008, Vol. 15 ›› Issue (3): 1-7.doi:

• Wireless •     Next Articles

Detection efficiency of cooperative spectrum sensing in cognitive radio network

CHEN Xing, BIE Zhi-song, WU Wei-ling   

  1. Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2007-10-06 Revised:1900-01-01 Online:2008-09-30


Sensing the spectrum in a reliable and efficient manner is crucial to cognitive radio. To combat the channel fading suffered by the single radio, cooperative spectrum sensing is employed, to associate the detection of multiple radios. In this article, the optimization problem of detection efficiency under the constraint of detection probability is investigated, and an algorithm to evaluate the required radio number and sensing time for maximal detection efficiency is presented. To show the effect of cooperation on the detection efficiency, the proposed algorithm is applied to cooperative sensing using the spectral correlation detector under the Rayleigh flat fading channel.

Key words:

cognitive radio;spectrum sensing;cooperative sensing;cyclostationarity