摘要
为了减小隐蔽终端对感知系统性能的影响和降低感知系统的错误率,提出方法：在考虑无线信道为瑞利信道和报道信道带有一定错误率的条件下,对带有p次方检测器的协作频谱感知系统,联合优化p次方检测器的次方数p和感知门限λ,并研究优化协作用户数K,使系统总错误率最小.理论分析与仿真结果表明,在给定初始条件下,协作频谱感知系统存在最佳指数p^＊和最佳感知门限λ^＊,同时在选择融合准则后,可以适当选择协作用户数K以提高感知系统可靠性.
In order to reduce effect of hidden terminal on cognitive system performance and the error rate of perceived system,it is proposed that,under the condition of considering wireless Rayleigh fading channel and reported channel with a fixed error probability,joint optimize index p of p power detector,optimal sensing threshold λ and the best number of cooperative users K on multiple antenna sensing system with p power detector to minimize the total error probability.Theoretical analysis and simulation results show that cooperative spectrum sensing system has the best index p＊ and the best perception threshold λ ＊,and when choosing a fusion rule it can improve the reliability for sensing system by choosing appropriate cooperative users K.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第3期84-91,共8页
Journal of East China Normal University(Natural Science)
基金
湖南省教育厅一般项目(14C0215)
益阳市科技局项目(2013JZ37)
2014年湖南城市学院虚拟仿真实验教学资源建设项目(3)
关键词
认知无线电
协作频谱感知系统
p次方检测器
融合准则
cognitive radio
cooperative spectrum sensing system
p power detector
optimal fusion rule
