Patent ID: 7627068
Filing Date: 2009-12-01
Classification: H03J,H04L

Abstract:
1. A frequency synchronization apparatus for detecting a frequency correction burst from a plurality of baseband signals, comprising: a plurality of signal power generators, each signal power generator receiving a predetermined number of symbols of the baseband signals and respectively calculating an average power value of the received symbols; a maximum signal selector, connecting to the signal power generators, for selecting out a maximum average power value from the average power values so as to produce a first detection value; and a decision unit, wherein the decision unit compares the first detection value with a first threshold to determine whether the frequency correction burst is received, and the decision unit further includes a signal processor for using a predetermined mathematical function to produce a second detection value; wherein the signal processor compares the second detection value with a second threshold to confirm whether the frequency correction burst is received; wherein the signal processor calculates a third detection value by combining the first detection value and the second detection value as described below: R whereby the third detection value is compared with a third threshold to confirm whether the frequency correction burst is received.