Robust iterative synchronization algorithm using Calabro Wolf perfect arrays

Next generation wireless communication systems are characterized by high bit-rate services. UMTS systems, already subject to standardization process, require a strict synchronization also for the uplink (mobile-to-base) channel. The operation is not trivial due to the fact that during the acquisition process, non synchronous users can impact on the ongoing transmissions reducing the overall systems efficiency. The following proposal describes a different approach to the synchronization problem which is based on a dedicated channel, shared by more users with a OFDM-CDMA transmission technique. The paper focuses on the adaptative algorithm used by the base station to track the users into the synchronization dedicated channel. The results obtained by computer simulations explore the dependence of the performances from the many parameters involved.