Patent ID: 8385482

Claim:
A start-up automatic frequency control method comprising: initial cell search processing a received sequence to facilitate the determination of a frequency location of a received signal by: producing a first frequency estimate based on an early version of the received sequence, a second frequency estimate based on a punctual version of the received sequence, and a third frequency estimate based on a late version of the received sequence; combining the first, second and third frequency estimates; and filtering the combined frequency estimates; wherein the first, second and third frequency estimates are each produced by: rotating a phase of a stored sequence to produce a first version of a stored sequence having a rotated phase; correlating the received sequence with the first version of the stored sequence to produce a first phase correlation; correlating the received sequence with a second version of the stored sequence that has a different rotated phase than the first version to produce a second phase correlation; and combining the first and second phase correlations to provide the frequency estimate.