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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Differential Barometric Altimetry Assists Floor Identification in WLAN Location Fingerprinting Study
verfasst von : Keqiang Liu, Yunjia Wang, Jian Wang
Erschienen in: Principle and Application Progress in Location-Based Services
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Abstract
Floor identification is an important aspect of indoor positioning while the resolution of altimetry is not very well, especially in WLAN Location Fingerprinting System. This chapter presents a differential barometric altimetry (DBA) method to identify floor in consideration of features of WLAN location fingerprinting system and the air pressure sensor in a smart mobile phone. The method is that it gets altitude for identification from filtering and calculating the air pressure data which is uploaded real time by both base station and mobile station and the base also support temperature data. The result of experiment shows the resolution of sensor is fairly high and filtered data is steady, the altimetry resolution is about 0.2 m, precision is less than 0.5 m, accuracy is about 1.0 m. All about the experiment indicate the method is fit for floor identification in indoor positioning.