Patent ID: 8005129
Filing Date: 2011-08-23
Classification: H04B

Abstract:
1. A wireless transmit and receive unit (WTRU), configured to receive wireless telecommunication signals in a down link pilot timeslot of a time frame format and to sample the received communication signals to produce communication signal samples comprising: a synchronization circuit for processing the communication signal samples; the synchronization circuit having a synchronization code determination circuit configured to receive the communication signal samples at a sample input rate that is at least as fast as a chip rate of the transmitted communication signals and processing the communication signal samples in sets each having Y samples; the synchronization code determination circuit including: a plurality of correlators including an input for receiving Y samples in parallel at the sample input rate; and a detection circuit operatively associated with the correlators to detect and track positive correlations of downlink synchronization codes with the sets; wherein: the number of correlators is no more than half the number X of downlink synchronization codes; each of the correlators includes a plurality of parallel matched filters associated with the correlators input, and each of the parallel matched filters is configured to process a separate segment of a set of Y samples for correlation with respective segments of the downlink synchronization codes having Y sequential elements; and each of the correlators has an output for outputting code correlations for each set of samples at a processing rate such that at least two synchronization codes of the X downlink synchronization codes are correlated with a set of Y samples per sample input rate period whereby collectively the correlators are configured to output to the detection circuit correlation data for all X synchronization codes before processing further communication signal samples.