Patent ID: 6693882
Filing Date: 2004-02-17
Classification: H04L

Abstract:
A method comprising the operations of:(a) correlating K sequences of ordered samples in a first signal with a predetermined waveform to produce K correlation outputs, each of the K correlation outputs corresponding to one of the K sequences and having a magnitude and being associated with an order index, K being an integer, the predetermined waveform corresponding to a frequency correction burst included in the first signal; (b) storing the K correlation outputs in a buffer according to the order indices; and (c) estimating a parameter based on the K correlation outputs, the parameter indicating detection of the frequency correction burst; wherein operation (c) comprises the operations of: (1) combining each N of the K correlation outputs to produce a first value associated with one of the order indices, N being an integer smaller than K; (2) determining a maximum first value of the first values; and (3) determining a peak index as the parameter, the peak index being an order index associated with the maximum first value, the peak index indicating timing of the frequency correction burst.