基于瞬时信噪比已知的能耗有效协作频谱感测算法  

Energy efficient cooperative spectrum sensing nased on the known instantaneous SNR

作　　者：虞贵财[1] 龙承志[1] 向满天[1] 

机构地区：[1]南昌大学信息工程学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2015年第1期76-82,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(61362008;61362022);江西省自然科学基金资助项目(20142BAB207005);江西省科技计划项目资助项目(20142BBE50016);江西省教育厅科技资助项目(GJJ14139)

摘　　要：为了降低传感节点的能耗,给出了认知传感器网络中能耗有效的协作频谱感测算法。算法研究了瞬时信噪比已知情况下感测节点选择方法和能量检测门限设定方案。在满足全局检测概率和虚警概率的限定条件下,设定判决门限和选择感测节点,使得分布式感测节点的能耗最低。仿真结果表明:算法明显降低了认知传感器网络的节点总能耗,提高了能耗效率。In order to save energy in the nodes,an energy-efficient scheme was proposed for cooperative spectrum sensing in cognitive wireless sensor networks. In our scheme,a technique was introduced to select the sensing nodes and to set detection threshold based on the known instantaneous SNR. Our objective was to minimize the energy consumed in distributed sensing subject to constraints on global probability of detection and probability of false alarm by determining the detection threshold and selection of the sensing nodes. Simulation results showed that the proposed algorithms lead to significant energy saving in cognitive sensor networks,energy efficiency was improved.

关 键 词：认知无线传感器网络 检测概率 虚警概率 协作频谱感测 检测门限 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]