FaStER: Fast, Stable, Expendable and Reliable Radio Map for Indoor Localization

Abstract

At present, fingerprinting based localization methods gain a massive attraction for numerous indoor location-based services. However, creation of a radio map is a laborious and time-consuming process that limits the applicability of this method. In this study, we propose FaStER, a Fast, Stable, Expendable and Reliable radio map creation system for fingerprinting based indoor localization applications. Data from a chest mounted IMU with ZigBee protocol based wireless network technology and indoor floor plan are used as inputs to the system. The proposed system ensures high accuracy both in terms of location estimation and RSSI acquisition by correcting errors generated from the IMU and from the presence of human body. The stability of a generated radio map is guaranteed by exploiting the concept of RSSI similarity index. The system is especially proposed for facilitating indoor location-based services with chest mounted wearable devices towards IoT connected wearable health and environmental monitoring applications. Results demonstrate that the proposed system can create a fast, stable, expendable, and reliable radio map that can help to improve the accuracy for location fingerprinting.