Patent ID: 6728326
Filing Date: 2004-04-27
Classification: H04L

Abstract:
A method for initially synchronizing a mobile terminal, said method comprising:receiving a received signal containing a sequence of symbols including a synchronization word, said symbols being selected from a set of n possible symbols; converting said received signal to a lower frequency to produce a lower frequency signal having an unknown frequency error; sampling said lower frequency signal at a rate M times a transmitted symbol rate to produce M symbol-rate sample sets having M different sampling phases; raising a plurality of said symbol-rate sample sets to an nth power to produce a plurality of n-power sample sets; performing a FFT on said plurality of n-power sample sets to produce a plurality of FFT data sets; selecting one of said plurality of symbol-rate sample sets based on said plurality of FFT data sets; and correlating a known sequence with said selected symbol-rate sample set to locate said synchronization word in said selected symbol-rate sample set.