衰落信道下的传感器网络局部容错目标检测  

Local Fault-tolerant Decision Fusion under Fading Channel in Sensor Networks

作　　者：刘守军[1] 刘克中[2] 陈伟[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070 [2]武汉理工大学航运学院,湖北武汉430063

出　　处：《武汉理工大学学报（信息与管理工程版）》2014年第2期150-153,158,共5页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(51279151)

摘　　要：针对衰落信道下的目标检测问题,提出了一种基于局部容错机制的决策融合算法(LFTDF)。利用邻居节点数据的空间相关性,各传感器节点按照多数原则调整自身决策,实现节点局部容错的目的。在瑞利分布的衰落信道模型下,对最优似然比融合规则进行近似处理,提出了次优的简单平均融合规则。仿真结果表明,该算法可以有效地提高系统检测性能。Aiming at target detection under fading channel , a decision fusion algorithm based on local fault -tolerant was proposed .Considering the spatial correlation of sensor data between neighboring nodes , each node modifies its decision according to majority principle to achieve the purpose of fault -tolerant.Based on approximating the fusion rule of optimal likelihood ratio , a sub-optimal alternative was proposed under the assumption of Raleigh channel model .Simulation results show that the algo-rithm can improve the detection probability significantly .

关 键 词：衰落信道 局部容错 决策融合 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]