摘要
针对基于测距的定位方法误差较大的缺陷,提出一种基于链路质量差值的节点定位方法。通过邻居信标节点的交互,获取相应的路径损耗因子,并根据信标节点和待定位节点间的不同链路质量值之差,利用极大似然估计实现低复杂度高精度定位。仿真结果表明,该方法同RSSI和DV-HOP等定位方法相比,具有较高的定位精度和定位成功率。
To reduce the errors about the range-based localization algorithms, a kind of localization meth- od based on difference of link quality is proposed. Path loss factor can be obtained with the help of neighbor beacon node＇s interaction and the high precise localization information can be acquired on the basis of maximum likelihood estimation as well as the difference values of the link quality between beacon nodes and unknown nodes. Simulation results demonstrate that the proposed localization algorithm performs well on the aspect of localization accuracy as well as localization success rate compared with the RSSI and DV- HOP algorithm.
出处
《南京邮电大学学报（自然科学版）》
2010年第3期58-64,69,共8页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(60973139
60773041)
江苏省自然科学基金(BK2008451)
2009江苏省软件专项
省级现代服务业发展专项资金
中国博士后科学基金(0801019C)
江苏省博士后科研资助计划(20090451240
20090451241)
江苏高校科技创新计划(CX09B_153Z)
江苏省"六大人才高峰"计划(2008118)资助项目
关键词
无线传感器网络定位
路径损耗因子
链路质量指示
wireless sensor network localization
path loss factor
link quality indication
