A new criteria decision applied on the primary synchronization in the DS-WCDMA interface of the UMTS system
01 February 2002
In DS-WCDMA mobile systems such the UMTS, asynchronous cell site operation, assigning different long spreading code to each cell, yields the advantage of flexible system deployment. We can design an indoor system based on an outdoor one. However, in general, much longer search time is required in asynchronous operation than in synchronous. This paper proposes three techniques to take decisions about synchronization based on observation of correlated signals. Classical decision criteria like maximum and threshold criterion are presented. A new decision criteria that we call Threshold&Max combined decision criteria is analyzed. The results of this new introduced technique is compared with the classical ones.