An Indoor Positioning System Based on MEMS Inertial Sensor Technology

摘要

Indoor positioning is still a great challenge for navigation systems based on GNSS (Global Navigation Satellite System) like GPS (Global Positioning System) and HSGPS (High Sensitivity Global Positioning System). Other wireless technologies such as UWB (Ultra-Wide-Band) and WLAN (Wireless Local Area Network) suffer from limited coverage caused by low signal levels or do not use propagation delay of signals for their calculations which degrades positioning accuracy significantly. A suitable way to face this problem is the utilisation of an INS (Inertial Navigation System) for indoor positioning. This paper assesses the performance obtained from a low cost INS in combination with novel position calculation algorithms. A brief overview of some measurement results and positioning accuracy as well as an outlook is provided. Furthermore several alignment techniques for repositioning within defined periods of time or distances are discussed.