摘要
无线网络中非视距误差对于三边定位算法精度的影响较大。针对存在固定节点与移动节点的无线传感网络系统,提出了一种基于面积残差最小化的最优化定位算法,算法中非视距误差影响下的定位问题被建模为二次规划问题,其核心思路在于运用海伦公式构建面积残差和优化目标函数。从仿真结果可以看出在非视距误差较大或网络中固定节点较多时,本文提出的算法可以有效消除非视距误差引起的定位误差,同时本文算法还具有对节点数目要求小的优势。
The non-line-of-sight（NLOS）error significantly reduces the accuracy of trilateration algorithm in wireless networks.Therefore,by considering the wireless sensor network including both the static nodes（SN）and the mobile nodes（MN）,this paper proposes a localization algorithm aiming at the area residual minimization,where the NLOS corrupted localization is modeled as a quadratic programming（QP）problem.Moreover,the Heron formula is employed to construct the area residual and therefore the cost function of QP.The simulations demonstrate that the proposed algorithm can effectively reduce the positioning accuracy loss for scenarios with large NLOS errors or SN numbers.Furthermore,the proposed method works well even with only few SNs.
作者
李溯南
华惊宇
李佳珉
卢为党
陈芳妮
余旭涛
LI Sunan;HUA Jiangyu;LI Jiamin;LU Weidang;CHENG Fangni;YU Xutao(Zhefiang Provincial Key Lab of Opt Commun Tech, Zhefiang University of Technology, Hanzhou 210023, China;National Mobile Communication Research Laboratory,Southeast University, Nanjing 210096, China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第2期253-257,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金课题项目(61471322)
关键词
无线定位
非视距误差
最优化理论
海伦公式
无线传感网络
wireless localization
non-line-of-sight error
optimization theory
Helen formula
wireless sensor network
