Acta Metallurgica Sinica(English letters)

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Cooperative blind spectrum sensing using autocorrelation matrix


  1. 1. Laboratory 304 of Communications and Information Systems, Electronic Engineering Institute, Hefei 230037, China 2. College of Electronic Information and Automation, Chongqing University of Technology, Chongqing 400054, China
  • Received:2010-09-01 Revised:2011-01-25 Online:2011-06-30 Published:2011-06-13
  • Contact: Chuan-hai JIAO


To improve the spectrum sensing performance in cognitive radios, a scheme of cooperative blind spectrum sensing based on autocorrelation matrix is proposed. The test statistic is extracted from the autocorrelation matrix of the received signal samples and a bi-threshold hybrid decision scheme is designed for local spectrum sensing. The cognitive radio base station makes a credibility fusion based on the local soft decisions and then takes global fusion combining with the local hard decisions. The proposed method is blind in the sense since it requires no apriori knowledge of the signal and the noise power. Theoretical analysis and computer simulation results show that the proposed method can enhance the spectrum sensing capability.

Key words:

cognitive radio, spectrum sensing, autocorrelation matrix, blind detection

CLC Number: