现代电子技术Issue(7)：23-27,5.
基于无线传感器网络时钟同步的定位算法研究
Survey on clock synchronization localization algorithm based on wireless sensor network
陈辉 1熊辉 1殷昌盛 1魏浩1
作者信息
- 1. 国防科学技术大学 电子科学与工程学院，湖南 长沙 410073
- 折叠
摘要
Abstract
A novel time synchronization localization algorithm based on the signal′s time⁃difference⁃of⁃arrival(TDOA)be⁃tween wireless sensors(it is called anchor node in this paper)at known position is discussed in this paper. The idea of the paper is that all sensors periodically broadcast signals to each other,the clock skew can be estimated based on local time⁃of⁃arrival (TOA)measurement of broadcast signals. When the source transmits signal,the initial TDOA error caused by the clock offset of sensors can be mitigated by a compensation operation. In this paper,Kalman filtering is combined to improve the accuracy of clock difference and track the clock drifting due to random fluctuations. Based on a Gaussian noise model,maximum likelihood estimates(MLE)for the source position are obtained. Based on this,the positioning accuracy of tagged node is improved.关键词
无线传感器网络/卡尔曼滤波/定位/到达时间差/到达时间/钟差估计Key words
wireless sensor network/Kalman filtering/localization/time-difference-of-arrival/time-of-arrival/clock offset estimation分类
信息技术与安全科学引用本文复制引用
陈辉,熊辉,殷昌盛,魏浩..基于无线传感器网络时钟同步的定位算法研究[J].现代电子技术,2015,(7):23-27,5.
