传感技术学报2016，Vol.29Issue(6)：920-926,7.DOI:10.3969/j.issn.1004-1699.2016.06.022
基于阈值机制与距离校正的WSN改进DV-Hop定位算法
An Improved DV-Hop Localization Algorithm Based on Threshold Mechanism and Correcting Distance for Wireless Sensor Networks
摘要
Abstract
In the wireless sensor network DV-Hop localization algorithm,the location of unknown nodes only consid⁃ers the average hop distance from its nearest anchor node,which is used to multiply the number of hops to replace the real distance but thus,it will lead to large positioning errors. This paper proposes a high-accuracy localization al⁃gorithm TMCD-DV-Hop,which is a developed DV-Hop algorithm of relative high accuracy,based upon threshold mechanism and distance correction and the developed algorithm firstly calculates hop thresholds,and the effect of the other beacon nodes lying outside the nearest anchor node in the local range and global range is considered ,thus, best corrected average hop distance has been chosen to estimate the distance,and an estimated coordinate is gained by centroid algorithm after the combinatorial optimization of anchor nodes within the single-hop communicative radi⁃us,meanwhile,another estimated coordinate is gained by weighted least-squares method. At last arithmetic mean of two estimated coordinates is considered as orientation coordinate for unknown nodes. Simulation experiment mani⁃fests that in the same network environment,developed TMCD-DV-Hop algorithm could better lower down position⁃ing errors than DV-Hop in the end the positioning accuracy is elevated.关键词
无线传感器网络/DV-Hop算法/阈值机制/校正平均跳距Key words
wireless sensor network/DV-Hop algorithm/threshold mechanism/corrected average hop distance分类
信息技术与安全科学引用本文复制引用
向满天,王胜,杨友华..基于阈值机制与距离校正的WSN改进DV-Hop定位算法[J].传感技术学报,2016,29(6):920-926,7.基金项目
国家自然科学基金项目（61362022，61362008）；江西省科技计划项目 （）
