文件名称：LOCATIONING IN DISTRIBUTED AD-HOCWIRELESS SENSOR NETWORKS
文件大小：167KB
文件格式：PDF
更新时间：2013-12-03 13:44:50
sensor；locationing
Evolving networks of ad-hoc, wireless sensing nodes rely heavily on the ability to establish position information. The algorithms presented herein rely on range measurements between pairs of nodes and the apriori coordinates of sparsely located an- chor nodes. Clusters of nodes surrounding anchor nodes cooperatively establish confident position estimates through assump- tions, checks, and iterative refinements. Once established, these positions are propagated to more distant nodes, allowing the entire network to create an accurate map of itself. Major obstacles include overcoming inaccuracies in range easurements as great as ±50%, as well as the development of initial guesses for node loca- tions in clusters with few or no anchor nodes. Solutions to these problems are presented and discussed, using position error as the primary metric. Algorithms are compared according to position error, scalability, and communication and computational require ments. Early simulations yield average position errors of 5% in the presence of both range and initial position inaccuracies.