Patent ID: 7433437
Filing Date: 2008-10-07
Classification: H04B,H04J,H04W

Abstract:
1. A user equipment (UE), comprising: a first module configured to process a received communication signal and generate an index value associated with a primary synchronization code within the communication signal, the first module comprising: a splitter configured to split a sampled communication signal into even and odd samples; a Hierarchical Golay Correlator (HGC) configured to correlate the even and odd samples with a primary synchronization code of the communication signal, and to generate complex values of the even and odd samples; an absolute value modifier (AVM) configured to approximate signal strength values for each of the even and odd samples; a decision circuit configured to accumulate the approximate signal strength values of the samples within a frame of the communication signal, assigning as an index value a highest accumulated signal strength value, and to determine a chip offset based on the index value; a normalizer circuit configured to normalize the accumulated signal strength value; a look-up table configured to determine a gain factor; a multiplier configured to generate a noise threshold based on the normalized signal strength value and on the gain factor; and a comparator configured to compare the noise threshold to the index value in order to make a first decision; a second module configured to generate a scrambling code group number, a slot offset, and secondary synchronization code based on output provided by the first module; a third module configured to retrieve a primary scrambling code based on the scrambling code group number and slot offset; and a controller coupled to the first module, second module, and third module, the controller configured to control a search frequency of the UE for establishing a communication link.