The Location Stack: Multi-sensor Fusion in Action

The Location Stack is a set of design abstractions and sensor fusion techniques for location systems. It employs novel probabilistic techniques such as particle filters to fuse readings from multiple sensor technologies while providing a uniform programming interface to applications. Our implementation is publicly available and supports many location sensor technologies. Specifically, our live demonstration tracks multiple people using statistical sensor fusion of RFID proximity tags and ultrasonic distance measurement badges. Participants are invited to don tracking badges and watch a projected visualization of the real-time probabilistic estimates of all participants’ locations.