Abstract
Virtual reference elimination algorithm is a method to investigate the location accuracy of location identification based on dynamic active RFID calibration being restricted by the number of reference tags. However, the Received Signal Strength Indicator(RSSI) values of virtual reference tags, achieved from the linear interpolation formula in VIRE, are not enough precise according to the distance-loss equation. Severe redundant calculation was inducted in the case of all the tracking tags positioned intensively. The proposed location algorithm suggests a subregion selection mechanism to reduce the redundant calculation, brings forward a nonlinear interpolation algorithm to calculate the RSSI values of virtual reference tags. A trajectory revision method is used to improve the location precision as well. Simulation results demonstrate that the location accuracy of optimized algorithm is better than that of VIRE.
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