FLOOR IDENTIFICATION USING SMARTPHONE BAROMETER SENSOR FOR INDOOR POSITIONING

Indoor positioning has emerged in recent years for providing location based services for localization, tracking and navigation systems. Indoor positioning in smartphones has become possible with the availability of good processors, sensors and connectivity in smartphone. Floor identification is an important aspect of indoor positioning. This paper proposes a method to overcome the altimeter error caused by atmosphere erratic changes with time; thereby it improves the positioning accuracy of the user height. The relationships among the atmospheric pressure, the absolute height, and the floor location are described along with a real-time calibration method using smartphone Barometer sensor. The proposed method is tested in a building consists of seven floors and quite very good accuracy has been achieved.