Research on AOA Based Fingerprint Location Basing on Spherical Antenna Array

• 1、School of Electronic Engineering, Beijing University of Posts and Telecommunications,Beijing 100876

Abstract：The growing commercial demand for Indoor Location Based Serve (ILBS) has promoted the development of many indoor positioning technologies in recent years . Because GPS (Global Positioning System) can\'t penetrate the wall, and the cost is high, it is not suitable for indoor positioning. Advanced indoor positioning technology and efficient system deployment become the focus of research. At the same time, for some large shopping malls, hospitals, warehouses, parking lots and other occasions, in addition to plane location information, height information is also an important part of location information. Three-dimensional positioning is very important for many indoor positioning applications, but it is usually complex and costly. The purpose of this paper is to find a simple deployment and high positioning efficiency indoor three-dimensional (3D, Three Dimension) positioning algorithm. In this paper, a spherical antenna array is introduced, and AOA estimation based on spherical antenna is used as position fingerprint to locate indoor fingerprint. The simulation results show that the fingerprint location results based on OA are insensitive to the heterogeneous interference of the equipment but sensitive to the disturbance. Therefore, we further introduce Kalman filter to process RSS. The simulation results show that the fingerprint location method based on OA is insensitive to the environmental disturbance and the heterogeneity of the equipment after the processing of Kalman filter, which improves the robustness to the environment and the positioning accuracy by 25%.

Keywords： Indoor Location Spherical Antenna 3D Localization AOA RSS Fingerprint Localization