Journal on Communications ›› 2014, Vol. 35 ›› Issue (3): 168-173.doi: 10.3969/j.issn.1000-436x.2014.03.019

• Academic paper • Previous Articles     Next Articles

Improved cooperative spectrum sensing scheme based on dempster-shafer theory in cognitive radio network

Mei-ting YU,Lin-jing ZHAO,Zhao LI   

  1. State Key Laboratory of Integrated Service Networks,Xidian University,Xi'an 710071,China
  • Online:2014-03-25 Published:2017-08-17
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;National S&T Major Project;Fundamental Research Funds for the Central Universities;Program for Changjiang Scholars and Innovative Research Team in University;The 111 Project

Abstract:

An improved cooperative spectrum sensing scheme based on dempster-shafer evidence theory in cognitive radio networks was proposed.In the local sensing period,the projection approximation algorithm was introduced to reduce bandwidth for cooperation.In the fusion period,credibility was calculated by the distance between evidence vectors of different secondary users and adopted as the weights to combine different local sensing data.The new scheme reduces channel bandwidth and simulation results show that the new scheme improves the performance under the condition of high level conflict.

Key words: cooperative spectrum sensing, data fusion, dempster-shafer theory of evidence, high level conflict

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