A New Criteria Decision Applied on the Primary Synchronization in the DS-WCDMA Interface of the UMTS System |
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Authors: | Murad Nour Mohammad Belfiore Jean Claude Guisantes George Rodriguez |
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Affiliation: | (1) COM-ELEC Dept., ENST – Alcatel CIT Velizy, 46, Rue Barrault, 75013 Paris, France;(2) COM-ELEC Dept., Télécom Paris, 46, Rue Barrault, 75013 Paris, France |
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Abstract: | In DS-WCDMA mobile systems such the UMTS, asynchronous cell site operation,assigning different long spreading code to each cell, yields the advantageof flexible system deployment. We can design an indoor system basedon an outdoor one. However, in general, much longer search time isrequired in asynchronous operation than in synchronous. This paperproposes three techniques to take decisions about synchronizationbased on observation of correlated signals. Classical decision criterialike maximum and threshold criterion are presented. A new decisioncriteria that we call Threshold&Max combined decision criteriais analyzed. The results of this new introduced technique is comparedwith the classical ones. |
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Keywords: | synchronization decision criteria DS-WCDMA UMTS |
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