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Localization algorithm in wireless sensor networks based on semi-supervised manifold learning and its application
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DOI：10.1007/s10586-009-0118-7.png)
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Localization of mobile nodes in wireless sensor network gets more and more important, because many applications need to locate the source of incoming measurements as precise as possible Many previous approaches to the location-estimation problem need know the theories and experiential signal propagation model and collect a large number of labeled samples So, these approaches are coarse localization because of the inaccurate model, and to obtain such data requires great effort In this paper, a semi-supervised manifold learning is used to estimate the locations of mobile nodes in a wireless sensor network The algorithm is used to compute a subspace mapping function between the signal space and the physical space by using a small amount of labeled data and a large amount of unlabeled data This mapping function can be used online to determine the location of mobile nodes in a sensor network based on the signals received We use independent development nodes to setup the network in metallurgical Industry environment, outdoor and indoor Experimental results show that we can achieve a higher accuracy with much less calibration effort as compared with RADAR localization systems
Keyword:
Wireless sensor networks
Mobile nodes
Localization
Semi-supervised manifold learning
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