Sensor Fusion Enhancement for Mobile Positioning Systems

Abstract

Recently, a great amount of mobile devices are equipped with various sensors such as accelerometers, GPS receivers, gyroscopes, microphones and cameras. Moreover, all these devices use embedded Bluetooth and wireless network cards for mobile communication. One of the most significant development of recent years is GPS. This system has become the standard for navigation for many people all over the world. A huge variety of applications employ GPS from car positioning to mobile phone navigation for emergency purposes. In spite of the fact that this system is commonly used in everyday’s actions it has some limitations. GPS is unable to determine the position inside the buildings, because of the loss of signal from satellites. Recently, due to existence of ubiquities mobile devices the curiosity in location based services has considerably increased. The application of Bluetooth and wireless network was employed for portable positioning systems. However, those systems considerably increase the accuracy for indoor localization, still the outcome is not satisfactory. Thus, the combination of a variety of signals measured by mobile equipments could provide an enhancement for mobile system used in positioning.