Details

Autor(en) / Beteiligte

• Chen, Guoliang
• Meng, Xiaolin
• Wang, Yunjia
• Zhang, Yanzhe
• Tian, Peng
• Yang, Huachao

Titel

Integrated WiFi/PDR/Smartphone Using an Unscented Kalman Filter Algorithm for 3D Indoor Localization

Ist Teil von

• Sensors (Basel, Switzerland), 2015-09, Vol.15 (9), p.24595-24614

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2015

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Because of the high calculation cost and poor performance of a traditional planar map when dealing with complicated indoor geographic information, a WiFi fingerprint indoor positioning system cannot be widely employed on a smartphone platform. By making full use of the hardware sensors embedded in the smartphone, this study proposes an integrated approach to a three-dimensional (3D) indoor positioning system. First, an improved K-means clustering method is adopted to reduce the fingerprint database retrieval time and enhance positioning efficiency. Next, with the mobile phone's acceleration sensor, a new step counting method based on auto-correlation analysis is proposed to achieve cell phone inertial navigation positioning. Furthermore, the integration of WiFi positioning with Pedestrian Dead Reckoning (PDR) obtains higher positional accuracy with the help of the Unscented Kalman Filter algorithm. Finally, a hybrid 3D positioning system based on Unity 3D, which can carry out real-time positioning for targets in 3D scenes, is designed for the fluent operation of mobile terminals.