Research Of Three Dimensional Weighted Centroid Localization Algorithm Based On RSSI

With the advance of science and technology, people’s lives have also changed a lot. Nowadays, with the rapid development of Internet, more and more people pay attention to the location technology. The demand is gradually increasing, so there are a lot of positioning technology. Wireless sensor network (WSN) has high localization precision and low cost, and it has become the focus of the research.In WSN localization technology, the research on RSSI 3D weighted centroid localization algorithm use WSN and RSSI to carry out the positioning of users or items, it has a great research significance in today’s increasingly strong demand for location-based services.The RSSI localization technology based on two dimensional space depend on the environment very much, and it is easy to be affected by multipath effects and obstacles in a relatively complex environment, thereby reducing the positioning accuracy. At present, the three-dimensional positioning technology is also facing such problems, so to find a suitable location algorithm, reduce the impact of environmental factors on the signal, and improve the positioning accuracy is the focus of the study. In view of the above problems, this paper proposes a three-dimensional space weighted centroid localization algorithm, and through simulation and experiment, it is proved that the weighted positioning algorithm is effective and practical.The main contents of this paper are:analysis and elaborates the basic concept of RSSI localization, and in contrast the traditional after RSSI three-dimensional localization algorithm based on the proposed new weighted centroid localization algorithm, respectively, using the MATLAB simulation platform and hardware for client based on fixed position system is used to validate the weighted centroid algorithm provides reliable theoretical support. Finally, the conclusion of the feasibility of the algorithm is analyzed and compared.