INDOOR NAVIGATION SYSTEM USING INERTIAL SENSORS AND SHORT-WAVELENGTH LOW ENERGY DEVICE

摘要

A system for a tracking device and and a method thereof is provided, the system comprises: a wireless module for receiving location reference from an external wireless device, and determining distances from the external wireless devices; an inertial measurement unit (IMU) having an accelerometer for obtaining an acceleration vector and a gyroscope for obtaining an angular velocity vector; a processing unit for determining a first estimated coordinate relative to a global frame from the location reference, calculating a second estimate coordinate relative to the global frame with the acceleration vector, the angular velocity vector, and the ambient atmospheric pressure.