INESC TEC

A Ubiquitous Solution for Location-Aware Games

This research presents a technical framework designed to overcome the limitations of GPS and wireless positioning in location-aware mobile gaming, particularly within indoor environments.

• Integrating smartphone accelerometers, magnetometers, and gyroscopes into a Pedestrian Dead Reckoning (PDR) system provides a viable alternative to GPS for indoor location-aware gaming.
• The PDR framework improves accuracy by using a direction cosine matrix for sensor fusion and a magnetic disturbance detection technique to ignore unreliable magnetometer data.
• Step detection is managed via a state machine, while step length is calculated using a weighted linear regression model that accounts for individual gait dynamics.