TrueStory: Accurate and Robust RF-based Floor Estimation for Challenging Indoor Environments

WiFi-based indoor localization systems are popular due to the WiFi ubiquity and availability in commodity smartphone devices for network communication. The majority of these systems focus on finding the user's 2-D location in a single floor. However, this is of little value when the altitude of the user is unknown in any typical multi-story building. In this paper, we propose TrueStory: a system t...