Apparatus for frequency synchronization and method for the same

Details Apparatus for frequency synchronization and method for the same Apparatus for frequency synchronization and method for the same

2005-07-26

2009-12-01

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S293000, C375S343000, C375S354000, C375S359000, C375S364000, C455S133000, C455S134000, C455S140000, C455S502000

Reexamination Certificate

active

07627068

ABSTRACT:
An apparatus and method for frequency synchronization is proposed to obtain the pilot tones and evaluate the frequency offset and time offset for frequency synchronization. The frequency synchronization method has the following steps: filtering a baseband signal of a frequency correction burst by using multiple pre-filters; measuring the baseband signal and the signals output from the pre-filters to produce the first power value and the second power values respectively; normalizing the maximum second power value by using the first power value so as to produce the first detection value; using the samples of the baseband signal at different time points and a predetermined mathematical function to produce the second detection value; combining the first and second detection values to produce the third detection value; and using the third detection value to determine whether the frequency correction burst is received or not.

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