Improving Accuracy of FingerPrint DB with AP Connection States
Studies for indoor positioning system based on the fingerprint method are increasing its importance. Improving the accuracy of finger print DB using Wi-Fi AP (Access Point) can give great effects on positioning. In this paper, the authors analyze active Wi-Fi signal phenomena from reference AP which is accessed by multi-users. Some factors which can affect the accuracy of position are studied by comparing signal patterns in the DB and real-time active signals. They propose a modified finger print DB method on both AP connection and AP disconnection which can improve performance accuracy of the positioning.