Automatic virtual calibration of range-based indoor localization systems

Barsocchi P., Lenzi S., Chessa S., Furfari F.

Wireless sensor network  Indoor propagation model  Electrical and Electronic Engineering  C.2.2 Network Protocols  Calibration parameters  Information Systems  Computer Networks and Communications  Indoor Localization 

The localization methods based on Received Signal Strength Indicator (RSSI) link the RSSI values to the position of the mobile to be located. In the RSSI localization techniques based on propagation models, the accuracy depends on the tuning of the propagation models parameters. In indoor wireless networks, the propagation conditions are hardly predictable due to the dynamic nature of the RSSI, and consequently the parameters of the propagation model may change. In this paper, we present an automatic virtual calibration method of the propagation model that does not require human intervention; therefore, can be periodically performed, following the wireless channel conditions. We also propose a novel RSSI-based localization algorithm that selects the RSSI values according to their strength, and uses a calibrated propagation model to transform these values into distances, in order to estimate the position of the mobile.

Source: Wireless communications and mobile computing (Print) 12 (2012): 1546–1557. doi:10.1002/wcm.1085

Publisher: John Wiley & Sons, Chichester, UK , Regno Unito

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