Research on indoor localization method based on PDR and Wi-Fi

As the single location technology is unable to meet the needs of indoor positioning accuracy and stability, we propose and design the PDR (pedestrian dead reckoning)/ Wi-Fi method for indoor location in this paper. It includes the stride length calculation method based on velocity trace, gyroscope and electronic compass in combination with Wi-Fi positioning method for direction judgement, and Wi-Fi correction methods suitable for different scenarios. The experimental results show that the improvement of stride length calculation method and direction judgement can effectively reduce cumulative error in PDR. The Wi-Fi correction methods based on sense choosing mentioned can also reduce the system complexity of the original way based on single correction way. The fusion of the correction methods and PDR positioning can enhance the positioning accuracy and stability.