Journal on Communications ›› 2015, Vol. 36 ›› Issue (3): 52-62.doi: 10.11959/j.issn.1000-436x.2015058

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Energy efficient cooperative spectrum sensing algorithm in cognitive wireless sensor networks

Gui-cai YU,Cheng-zhi LONG,Man-tian XIANG   

  1. Faculty of Information Engineering, Nanchang University, Nanchang 330031, China
  • Online:2015-03-25 Published:2017-06-21
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;The Natural Science Foundation of Jiangxi Province;The Science and Technology Foundation of Jiangxi Province;The Tech-nology Foundation of Department of Education in Jiangxi Province

Abstract:

A novel energy-efficient scheme of cooperative spectrum sensing in cognitive wireless sensor networks is proposed.Firstly,in order to reduce energy consumption of distributed sensor nodes,and assumed that instantaneous SNR and average SNR for each node is available.The mathematical model of spectrum sensing nodes energy consumption and optimum detection threshold are analyzed. Then, the theory of sensing node selection and decision threshold setting, combined an effective cooperative spectrum sensing scheme based on decision nodes selection is researched. The analy-sis and simulation results show that the proposed algorithm can effectively reduce total energy consumption in cognitive sensor networks, improve energy efficiency.

Key words: cognitive wireless sensor networks, detection probability, energy consumption; cooperative spectrum sens-ing, detection threshold

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