吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1297-1303.doi: 10.13229/j.cnki.jdxbgxb201504039

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Covariance matrix spectrum sensing algorithm based on stochastic resonance and MIMO technology

ZHAO Xiao-hui, LI Xiao-yan   

  1. College of Communication Engineering, Jilin University, Changchun 130012,China
  • Received:2013-06-17 Online:2015-07-01 Published:2015-07-01

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Abstract: In order to achieve reliable spectrum sensing by users under the condition of low Signal-to-Noise Ratio (SNR) and fading channel in cognitive radio systems, a new covariance matrix spectrum sensing algorithm based on stochastic resonance and Multi-input-Multi-output (MIMO) technology is proposed; and the calculation method of the decision threshold is derived. Simulations show that the performance of the proposed algorithm is batter than the algorithm without introduction of the stochastic resonance and MIMO technology. When the number of antennae is large enough, the proposed method can achieve good performance at low SNR.

Key words: communications, spectrum sensing, stochastic resonance, MIMO technology, covariance matrix

CLC Number: 

  • TN929
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