Examination of Accuracy of Interior Positioning

Indoor positioning applications have become widespread as the required sensors have become affordable. In the literature, the location accuracy obtained by using different types of sensors has been examined, but the placement geometry of the sensors is not taken into account. In order to address the stated research gap, the effect of sensor distribution on indoor location accuracy obtained by triangulation technique was examined. The effect of different placing distributions of 4 stations on the location accuracy obtained in different parts of the interior location was determined with simulation. White noise of 1 cm is added to the exact distances between the station and the measured point. Then linearized triangulation equations were solved by the least squares adjustment and location information was obtained by compensating the errors. Similar positioning accuracies were obtained when the station points were distributed evenly. However, in the analysis error values of the order of 35 cm were obtained especially in the regions close to the stations when the station points were placed on the same side of the room. As a result of this study, it was determined that the placement geometry of the station points significantly affects the location accuracy.