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

摘要/Abstract

摘要：

为了实现绿色节能认知通信的目标，针对协作感知和传输过程中的能量消耗问题，提出了一种基于能量约束的集中式协作频谱感知算法。建立了系统检测寿命最大化的频谱感知模型，对其进行了详细分析，给出了检测寿命最大化对应参数的搜索方法。仿真结果显示，该方法可以在满足检测精度的条件下有效延长认知网络的检测寿命，并提高低信噪比用户参与协作的几率。

关键词: 认知无线电, 协作频谱感知, 信噪比, 能量消耗, 检测寿命

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

苏健,宁国勤,秦峰. 基于能量约束的协作频谱感知算法研究[J]. 通信学报, 2012, 33(Z2): 256-261.

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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参考文献 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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