计算机工程Issue(12)：93-96,4.DOI:10.3969/j.issn.1000-3428.2013.12.020
NLOS环境下无线传感器网络TOA定位算法
TOA Location Algorithm in Wireless Sensor Network Under NLOS Environment
摘要
Abstract
Aiming at the existing localization algorithms have the problem of low positioning accuracy and less applicable scenario, under the Non-Line-of-Sight(NLOS) environments, a localization algorithm based on Time of Arrival(TOA) in Wireless Sensor Network(WSN) is proposed in this paper. It uses the initial estimation of the unknown node as the reference point, the Taylor series expansion method is used to calculate the second estimation iteratively. The second estimation value is used to calculate the approximate distance between the unknown node and the anchor nodes. And this distance can be modified with the original TOA distance to determine the NLOS errors. The TOA measurement groups which are seen as containing the large NLOS error can be removed. The Taylor method is used to get the precise position of the unknown node based on the rest of the TOA measurements after correction processing. Simulation results show that the proposed location algorithm can restrain NLOS error effectively, and has better location accuracy than the traditional location algorithms.关键词
非视距传播/定位/到达时间/无线传感器网络/锚节点/未知节点Key words
Non-Line-of-Sight(NLOS)/location/Time of Arrival(TOA)/Wireless Sensor Network(WSN)/anchor node/unknown node分类
信息技术与安全科学引用本文复制引用
徐彤阳..NLOS环境下无线传感器网络TOA定位算法[J].计算机工程,2013,(12):93-96,4.基金项目
国家自然科学基金资助项目(U1204606)；山西省高等学校科技创新基金资助项目(2013124)；浙江省教育厅科研计划基金资助项目(Y201225848) （U1204606）
