Gholami, M.R.Ström, E.G.Sottile F.Dardari, D.Conti, A.Gezici, SinanRydström, M.Spirito, M.A.2016-02-082016-02-082010http://hdl.handle.net/11693/28443Date of Conference: 16-18 June 2010The performance of several existing and partly new algorithms for positioning of sensor node based on distance estimate is compared when the distance estimates are obtained from a measurement campaign. The distance estimates are based on time-of-arrival measurements done by ultrawideband devices in an indoor office environment. Two different positioning techniques are compared: statistical and geometrical. In statistical category, distributed weighted-multidimensional scaling (dwMDS), least squares, and sum product algorithm are evaluated and in geometrical technique projections approach and outer approximation (OA) method are investigated. No method shows the best performance in all cases, while in many situations, sum product algorithm, dwMDS, nonlinear least square, projection approach, OA, and weighted least square work well. Copyright © The authors.EnglishLeast SquareMeasurement campaignMulti-dimensional scalingNon-linear least squaresOffice environmentsOuter approximationPositioning techniquesRange measurementsSum-product algorithmTime-of-arrival measurementsUltra wide band devicesWeighted least squaresApproximation algorithmsEstimationSensor nodesTelecommunication equipmentWireless networksLeast squares approximationsConference Paper