Συντάχθηκε 08-10-2012 14:18
από Eleni Stamataki
Email συντάκτη: estamataki<στο>tuc.gr
Ενημερώθηκε:
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Ιδιότητα: σύνταξη/αποχώρηση υπάλληλος.
Τμήμα Ηλεκτρονικών Μηχανικών & Μηχανικών Υπολογιστών
ΠΑΡΟΥΣΙΑΣΗ ΔΙΠΛΩΜΑΤΙΚΗΣ ΕΡΓΑΣΙΑΣ
Φασαράκη-Χίλλιαρντ Νίκου
με θέμα
“Συνεργατικός Εντοπισμός Θέσης υπό Περιορισμούς Εύρους Ζώνης ”
“Cooperative Localization Under Bandwidth Constraints”
Τρίτη 9 Οκτωβρίου 2012, 17:00 μ.μ.
Αίθουσα 2041, Κτίριο Επιστημών, Πολυτεχνειούπολη
Εξεταστική Επιτροπή
Επ. Καθ. Άγγελος Μπλέτσας (επιβλέπων)
Καθ. Αθανάσιος Λιάβας
Επ. Καθ. Καρυστινός Γεώργιος
Abstract
The proliferation of low-cost wireless networking options, the advance of sensor network technologies and the inherent importance of location awareness in many scenarios, from item tracking and monitoring to social networks, has generated an immense interest on localization techniques over the last years. This thesis considers the general problem of estimating the coordinates of networked sensors under constraints. Localization is considered "cooperative" in the sense that agents of unknown location cooperate with neighbouring agents in order to estimate their position in the network, and "constrained" in the sense that energy, bandwidth or cost limitations may exist.
Specific state-of-the-art localization techniques found in the literature are presented. Their performance is quantified on the basis of offered estimation accuracy and bandwidth requirements, in the presence of Gaussian or non-Gaussian, unimodal ranging error noise. This thesis offers concrete bandwidth-friendly versions of SPAWN, i.e., factor-graph based localization, that significantly reduce the total size of exchanged messages, one-to two- orders of magnitude. Furthermore, a computationally efficient algorithm is proposed that further reduces the mean squared error (MSE) compared to prior-art. Cramer-Rao bound calculation corroborates the efficiency of the new algorithms.
Συνημμένα:
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ΑΝΑΚΟΙΝΩΣΗ ΠΑΡΟΥΣΙΑΣΗΣ ΦΑΣΑΡΑΚΗ- ΧΙΛΛΙΑΡΝΤ ΝΙΚΟΥ.docx
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