Patent ID: 7443939
Filing Date: 2008-10-28
Classification: H04W

Abstract:
1. A method of synchronizing a receiver to a received signal comprising a series of chips arranged in successive periods, the method comprising: correlating a synchronization word with at least one period-length of the received signal; accumulating the correlation results to produce first cumulative correlation results; terminating the accumulation of the first cumulative correlation results after processing a first number of said period-lengths when the first cumulative correlation results exceed a threshold; examining the first cumulative correlation results to make a first determination of the position of the synchronization word in the received signal: displacing the beginnings of the period-lengths to produce a second number of shifted lengths; correlating the synchronization word with said first number of shifted lengths to produce second cumulative correlations results; and examining the second cumulative correlation results to make a second determination of the position of the synchronization word in the received signal.