LOCALIZATION ALGORITHM BASED ON MINIMUM CONDITION NUMBER FOR WIRELESS SENSOR NETWORKS

作     者：Du Xiaoyu Sun Lijuan Xiao Fu Wang Ruchuan 

作者机构：College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks 

出 版 物：《Journal of Electronics(China)》 (电子科学学刊（英文版）)

年 卷 期：2013年第30卷第1期

页      面：25-32页

学科分类：080202[工学-机械电子工程] 08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 0802[工学-机械工程] 

基　　金：Supported by the National Natural Science Foundation of China (No.61003236 61171053) the Doctoral Fund of Ministry of Education of China (No.20113223110002) the Natural Science Major Program for Colleges and Universities in Jiangsu Province (No.11KJA520001) Science & Technology Innovation Fund for higher education institutions of Jiangsu Province (CXZZ12_0481) 

主　　题：Wireless Sensor Network (WSN) 3D location Beacon node Fractional steps maximumlikelihood algorithm 

摘      要：During range-based self-localization of Wireless Sensor Network (WSN) nodes, the number and placement methods of beacon nodes have a great influence on the accuracy of localization. This paper proves a theorem which describes the relationship between the placement of beacon nodes and whether the node can be located in 3D indoor environment. In fact, as the highest locating accuracy can be acquired when the beacon nodes form one or more equilateral triangles in 2D plane, we generalizes this conclusion to 3D space, and proposes a beacon nodes selection algorithm based on the minimum condition number to get the higher locating accuracy, which can minimize the influence of distance measurement error. Simulation results show that the algorithm is effective and feasible.