A New Criteria Decision Applied on the Primary Synchronization in the DS-WCDMA Interface of the UMTS System

Byline: Nour Mohammad Murad (1), Jean Claude Belfiore (2), George Rodriguez Guisantes (2) Keywords: synchronization; decision criteria; DS-WCDMA; UMTS 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&amp Max combined decision criteriais analyzed. The results of this new introduced technique is comparedwith the classical ones. Author Affiliation: (1) COM-ELEC Dept., ENST -- Alcatel CIT Velizy, 46, Rue Barrault, 75013, Paris, France (2) COM-ELEC Dept., Telecom Paris, 46, Rue Barrault, 75013, Paris, France Article History: Registration Date: 13/10/2004