Abstract: In Wireless Cognitive Network(WCN),conventional cooperative spectrum sensing algorithms are used to enhance the accuracy of spectrum sensing,but cooperative spectrum sensing algorithm increases communication costs and the energy consumption of secondary users.For this reason,a Selective Trigger Cooperative Spectrum Sensing(STCSS) algorithm is proposed,this algorithm determines whether to trigger the secondary cooperative spectrum sensing based on the threshold of current spectrum sensing energy.This makes cooperative spectrum sensing is triggered only when necessary,thereby reduces energy consumption and communication overhead.Simulation results show that,compared with Cooperative Spectrum Sensing(CSS) and Fine And Fast Sensing Algorithm(FAF),STCSS algorithm enhances the detection probability and reduces energy consumption and overhead of communication.

Key words: cooperative spectrum sensing, Wireless Cognitive Network(WCN), energy consumption, detection probability, communication cost

摘要： 在无线认知网络中,常规协作频谱感知算法用于增强频谱感知的准确性,但是该算法增加了通信成本以及认知用户的能量消耗。为此,提出一种选择触发协作频谱感知算法(STCSS)。该算法基于当前频谱感知能量阈值判定是否触发二次协作频谱感知,使得协作频谱感知仅在必要时被触发从而降低能量消耗与通信成本。仿真结果表明,对比协作频谱感知算法与精细快速感知算法,STCSS算法可提高检测概率,减少能量消耗以及通信成本。

关键词: 协作频谱感知, 无线认知网络, 能量消耗, 检测概率, 通信成本

CLC Number: 

• TP393.17