Active RFID-Based Indoor Localization Algorithm Using Virtual Reference through Bivariate Newton Interpolation

Abstract

At present, the LANDMARC algorithm and the VIRE (Virtual Reference Elimination) algorithm both use RFID technology in indoor localization. VIRE algorithm is a location method by estimating the virtual reference tags based on active RFID. However, the RSSI (Received Signal Strength Indicator) values of virtual reference tags, achieved from the linear interpolation formula in VIRE, are not enough precise according to the RSSI-Distance curve. The proposed algorithm estimates the RSSI values of virtual reference tags by using a nonlinear interpolation, Bivariate Newton interpolation. Simulation results show that the proposed algorithm makes the location accuracy for 69.5% increasing than LANDMARC and 23.3% increasing than VIRE in average. © Springer-Verlag Berlin Heidelberg 2013.