An Indoor Positioning Algorithm using Bluetooth Low Energy RSSI

Abstract

As the Bluetooth technology evolves to its 4.0 version, great applicational opportunities emerge based on the inquiry of Received Signal Strength Index (RSSI).In this paper, a positioning algorithm using Bluetooth Low Energy RSSI is proposed for indoor application.First in our algorithm, RSSI value is pre-processed: outliers of RSSI are removed, and moving average of RSSI is calculated.Then distance is determined using pre-processed RSSI and Kalman filtering.Finally, a triangulation algorithm is used to calculate the current location of the mobile device.Experiment results show that our algorithm achieves positioning accuracy of 0.2~0.5m.