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Please use this identifier to cite or link to this item: http://hdl.handle.net/2108/968

Title: Modelli statistici degli orologi e problemi di sincronizzazione nei sistemi di sorveglianza cooperativa distribuita
Authors: Accardi, Luigi
Cavallini, Alessio
Keywords: oscillatore
stabilità
sincronizzazione
sorveglianza cooperativa distribuita (multilaterazione)
sistemi di sorveglianza terrestre
sistemi di sorveglianza aerea (WAM)
Issue Date: 3-Aug-2009
Abstract: The choice of a stable time reference common to all the components of a distributed system (i.e. made up by stations or sensors placed in different sites), is a topic which applies to several telecommunication and electronic problems. In a distributed system, in fact, it is fundamental that all elements have a unique time reference so that they can exchange data in unambiguous way and for a possible subsequent data elaboration. In this work a distributed system, the multilateration (in short MLAT) will be considered, with particular attention to the generation of a common time reference and to the keeping of synchronization between the different elements. In a MLAT system the ground stations receive Mode S signals (reply/squitter) from transponders installed on board the cooperative targets (en route aircrafts, aircrafts and vehicles on airport surface) and determine the position of targets using the TDOA (Time Difference of Arrival) technique. In the first part of the thesis (chapter...
URI: http://hdl.handle.net/2108/968
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