Walking direction estimation based on statistical modeling of human gait features with handheld MIMU
Résumé
Contrary to Global Navigation Satellite System or Wi-Fi based navigation, pedestrian dead reckoning (PDR) method with handheld inertial and magnetic sensors gives the opportunity to achieve indoor/outdoor ubiqui- tous pedestrian localization. A remaining PDR critical issue is the estimation of the walking direction. Existing methods are principally searching for the energy main axis, but they do not consider the variability of handmovements introduc- ing robustness issues. A new method, based on statistical models and likelihood maximization adjusted to the person and his/her activity, is proposed in this paper. Performance is assessed with experiments in amotion capture room and a shopping mall. The new statistical approach gives glob- ally better results than state of the art methods. A 1.4° to 15.3° error on the walking direction estimates is found over several '1-km walk' tests indoors