ABSTRACT
ABSTRACT: In this paper, a localization algorithm based on RFID is proposed to solve the problem of elevator positioning in the centralized monitoring system. The algorithm follows Euclidean distance by the received signal strength value (RSSI) between the reference tag and unknown node, adopts the dichotomy to rapidly approximate to determine the corresponding positioning interval, inserts the virtual label according to the required positioning precision dynamically, and estimates the unknown node positioning using the least-squares method. Performance analysis results indicate that the RFID-based system has an error of less than 0.1 m and improves the accuracy approximately 50% comparing with the common centroid algorithm. The results indicate that the algorithm can effectively locate the elevator and have a good positioning accuracy.
