Accelerometer enhancement for mobile positioning application
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In recent years, a majority of mobile devices are equipped with a number of sensors such as accelerometers, gyroscopes, GPS receivers, microphones and cameras. What is more all such devices use embedded Bluetooth and wireless network cards for mobile communication. However GPS is one of the most significant development of the twentieth century, it has some limitations. GPS could not determine the accurate position inside the buildings, because of the loss of signal froni the satellites. Recently, due to the existence of ubiquities mobile devices the interest in location based services has significantly increased. The application of Bluetooth and wireless network was employed for mobile positioning systems. However, those systems significantly increase the accuracy for indoor localization, still the results are not satisfactory. Thus, the combination. of various signals measured by mobile devices could provide an enhancement for mobile positioning systems. This chapter presents the performance of accelerometer embedded in mobile phones. The experiments have been performed in order to present the possibility of distance calculation with the usage of accelerometer.