Journal of Jishou University(Natural Sciences Edition)

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A Novel Spectrum Sensing Algorithm Based on MED for Cognitive Radio

WANG Hanrui,LI Manjiang,TANG Pengcheng,YANG Xi,LEI Kejun   

  1. (College of Information Science and Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2018-03-25 Published:2018-04-28
  • About author:LEI Kejun (1979—),female,was born in Yongzhou City,associate professor in College of Information Science and Engineering,Jishou University;research areas are signal processing and cognitive radio.
  • Supported by:

    National Natural Science Foundation of China (61362018);Hunan Provincial Department of Education (16A174);Jishou University Doctoral Talent Introduction Project;Inquiry Learning and Innovative Experiment for College Students of Hunan Province (2016[283])


A novel spectrum sensing algorithm based on maximum eigenvalue detection (MED)  is proposed for cognitive radio.Using the recent results of the large dimensional random matrix theory (LDRMT),a new theoretical decision threshold is obtained for MED method.The new decision threshold has more reliable sensing performance and  higher detection probability.Simulation results verify the effectiveness of the new MED algorithm.

Key words: cognitive radio, spectrum sensing, maximum eigenvalue detection, false-alarm probability, decision threshold

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