Indoor Pedestrian Tracking System Using Smartphone

--Buildings nowadays have become very complicated which increases the need for a solution that helps offices tracking people for safety and security. One of the active solutions that address the above mentioned issue is the indoor tracking systems. Traditional camera based indoor tracking is static and tedious task. As the smartphone become an integrated part of human daily life with its capability of connecting to Wi-Fi network together with its inertial sensors can be used as a tool in tracking systems. The Global Position System (GPS) are commonly used for tracking in outdoor environment and are not accurate in indoor environment. The idea of the proposed system is to exploit the Wi-Fi access points, inside the building, together with smartphone accelerometer sensor for constructing accurate and reliable indoor pedestrian tracking system which lets the building administrator to watch and track pedestrians, carrying smartphones, wherever they move inside the building. Also, it is preferable that a user track path is sketched on real building map presented at the administrator monitor screen. This work consists of offline phase which is responsible for recording Wi-Fi fingerprint, while an online phase is used to determine and track user locations. This work mainly depends on Wi-Fi fingerprinting technique for locating the user in the building. But due to the instability of Wi-Fi signal, the localization task does not provide sufficient accuracy for spotting a correct user tracking path. To overcome from such localization insufficient accuracy, the proposed system exploited a matrix, constructed during offline phase that offer a legible path between building locations, and used to reform the correct path.