An optimized three-dimensional positioning algorithm for rssi-based wireless sensor network

Abstract

For the application of sensor networks in three-dimensional space, the main method of data transmission is to transmit data by finding spatial coordinate positions, Node localization is one of the key factors of wireless sensor networks. Based on the traditional RSSI algorithm, this paper presents an improved centroid location algorithm with higher accuracy. In the three-dimensional space, the problem of finding the coordinates of unknown nodes is based on the quadrilateral measurement method. The distance between the four known anchor nodes and the unknown node is first measured, and then a rough solution is obtained by centroid positioning, and finally the more accurate node can be obtained by the Newton iteration method. The improved algorithm is more suitable for the use of three-dimensional space, and has better positioning accuracy than the traditional RSSI algorithm.