基于最小二乘测距定位算法信标最优部署模型

摘要

无线定位系统的信标部署方案对未知节点的定位性能有着重要影响.文中基于线性最小二乘定位算法的定位误差上界(该上界与信标部署拓扑结构和信标测距误差相关),首次演绎推导出矩形区域内信标最优部署模型以及信标数为3,4,5,6的最优部署拓扑.实验结果表明,采用文中所提的最优部署策略获得的平均定位精度比其它优化信标部署方案提高5％～35％.%In a wireless location system, the landmark deployment pattern seriously affects the localization performance of the unknown nodes. Based on the upper bound of localization error using the linear least squares algorithm, which reflects the placement of anchor nodes as well as ranging errors between the anchor nodes and unknown nodes, this paper, for the first time, deduces the optimal deployment pattern in the rectangular area, and gives the specific optimal topology with 3,4,5,6 anchor nodes, respectively. Extensive simulation results show that the proposed deployment strategies outperform other optimized landmark deployment patterns with 5% ～35% positioning accuracy improvements.