›› 2014, Vol. 27 ›› Issue (5): 156-.

• Articles • Previous Articles     Next Articles

Optimal Fusion Method for Cooperative Spectrum Sensing Under Noise Power Uncertainty


  1. (Communications Division,No.20 Institute of China Electronics Technology Group,Xi'an 710068,China)
  • Online:2014-05-15 Published:2014-05-14


The performance of spectrum sensing is investigated under the noise power fluctuation circumstances.Firstly,the lowest signal noise ratio (SNR) of which the base user can work normally is analyzed.And,when the SNR is larger than the twice parameter of noise power fluctuation,the reliable detection information can be attained.Moreover,under noise power fluctuation environments,the optimal fusion method can be proposed for cooperative spectrum sensing.Theoretical analysis and experiments show that the better performance of the proposed data fusion scheme can be attained in various SNR situations,especially in the larger difference of SNR environments.

Key words: cognitive radio;spectrum sensing;cooperative networks;noise power fluctuation

CLC Number: 

  • TN911