With the continuous development of ubiquitous computing research, more applications need to know the location information of objects, but the original positioning technology cannot meet the requirements of indoor positioning. Indoor positioning technology has become a research hotspot. This article briefly introduces the LANDMARC algorithm and VIRE (Virtual Tag Elimination) algorithm for applying RFID to indoor positioning, and proposes an improved algorithm based on Lagrange interpolation to address the problems of the VIRE algorithm. The final experimental results show that compared with the VIRE algorithm, the positioning accuracy of the improved algorithm is improved by 5% to 50%.
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