摘要
为提高无线传感器网络中待监测节点的定位精度,研究静态锚节点优化布设方法。通过几何精度因子的定义指出测距误差相同的前提下,锚节点几何形状对节点定位精度的影响;基于GDOP的表达式,从理论上严格推导出锚节点最优几何排列需满足的条件,给出最优几何排列的实例。仿真结果表明,锚节点最优布设下的定位精度远高于随机布设精度,这对监测应用中优化布设锚节点以提高定位精度具有指导意义。
To improve localization accuracy of single target monitoring in wireless sensor networks,the optimal deployment method of anchors was proposed.Through the derivation of geometric dilution of precision,the anchor geometry influence on localization accuracy under same measurement error was pointed out.Based on the formula of GDOP,the sufficient and necessary condition for optimal geometry was derived and the optimal deployment instance was given.Simulation results show that,comparing with random deployment of anchors,the localization accuracy of optimized deployment was improved remarkably.These results provide guideline for optimizing anchor deployment and improving localization precision in monitoring application.
作者
汪晗
王坤
张磊
宋树伟
WANG Han 1,2 , WANG Kun 1, ZHANG Lei 3, SONG Shu-wei 2(1. College of Command and Control Engineering, Army Engineering University, Nanjing 210007, China;2. Command Automation Station, 94860 PLA Troops, Nanjing 210018, China;3. Army General Staff, Beijing 100042, Chin)
出处
《计算机工程与设计》
北大核心
2018年第7期1807-1812,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(61273047
61573376)
关键词
无线传感器网络
锚节点
定位
几何精度因子
最优排列
wireless sensor network
anchor
localization
geometric dilution of precision
optimal deployment
