基于能量约束的协作频谱感知算法研究

doi:10.3969/j.issn.1000-436x.2012.z2.037

Abstract

Abstract:

With the aim of the realization of green energy-efficient cognitive communications,the energy consumption was mainly analyzed in the process of cooperative sensing and transmission,and an energy-efficient centralized cooperative spectrum sensing scheme was proposed.The spectrum sensing model of maximizing the detection lifetime of cognitive radio system was established and specified in detail.Furthermore,a searching method was presented to obtain the optimal detection lifetime and corresponding parameters.Simulation results reveal that the proposed scheme is able to extend detection lifetime and improve the probability of performing cooperative sensing for CR users with low SNR.

Key words: cognitive radio, cooperative spectrum sensing, energy consumption, detection lifetime

Jian SU,Guo-qin NING,Feng QING. Research on a cooperative spectrum sensing algorithm based on energy-constraint[J]. Journal on Communications, 2012, 33(Z2): 256-261.

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References 12

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方法1			方法2
分组号	每组平均信噪比（dB）	每组协作检测概率	分组号	每组平均信噪比（dB）	每组协作检测概率
1	?14.47	0.835	1	?12.73	0.970
2	?13.06	0.937	2	?12.57	0.969
3	?11.93	0.985	3	?12.53	0.991
4	?10.67	0.999	4	?12.3	0.986

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Research on a cooperative spectrum sensing algorithm based on energy-constraint

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