Patent ID: 6760365
Filing Date: 2004-07-06
Classification: H04B

Abstract:
A User Equipment (UE) for use in a wireless telecommunications system which utilizes a time frame format where base stations transmit in a down link pilot timeslot a synchronization code selected from a predetermined number X of downlink synchronization codes of Y sequential elements, where X and Y are integers greater than 15, at a predetermined chip rate, where the UE receives communication signals and samples the received communication signals at a sampling rate which is at least as fast as the chip rate, the UE comprising:a synchronization circuit for processing received communication signal samples; said synchronization circuit having a synchronization code determination circuit which receives samples at an input rate which is at least as fast as the chip rate and processes sets of sequential samples at a processing rate faster than the sample input rate; said synchronization code determination circuit including: a plurality M of Y element correlators, where M&lE;X/2, having an input for receiving in parallel at the sample input rate received communication signal samples and correlating each set of samples with at least two synchronization codes of the set of X downlink synchronization codes; and a detection circuit operatively associated with said correlators to detect and track positive correlations of downlink synchronization codes with sequential sample sets; each of said correlators having an output for outputting code correlations for each set of samples at at least twice the sample input rate such that collectively said correlators output to said detection circuit correlation data for all X synchronization codes before processing further communication signal samples.