Abstract: A distributed localization algorithm for determining the position ofnodes in a structured wireless sensor network is proposed. Detailsregarding the implementation of such algorithm are also discussed.Experiments were performed in a testbed area containing anchorand blind nodes deployed in it to characterize the pathlossexponent and to determine the localization error of the algorithm.The algorithm is shown to have localization error of 0.74m which isbetter than4.73m shown by centroid algorithm for three anchornodes.