A Vertical-Location Metric Based on Characteristics of Barometric Pressure Sensors

This article presents a vertical-location approach based on characteristics of barometric pressure sensors (BPSs), where the altitude information of mobile devices is measured and extracted from BPSs based on microelectromechanical systems. On account of environmental factors about atmospheric pressure changes and quantization noises, the calibration approaches are proposed to compute the height information about z-axis and to compensate for the offset difference between BPSs. The experimental results demonstrate that the vertical-location accuracy of the proposed approach can be used for the applications of location-based services.