Patent ID: 7554609

Claim:
A method for rejecting an interference component from a frequency spectrum of an input signal, the method comprising: receiving the input signal; locking the interference component in the input signal, wherein the locking step further comprises: extracting a first part of the input signal to generate the first part of the input signal; detecting a difference between the first part of the input signal and a first part of a locked signal; generating the locked signal according to the difference between the first part of the input signal and the first part of the locked signal; detecting the locking status of the locking step; filtering out the interference component from the input signal; and selecting only one of the received input signal and a resultant signal of the filtering operation for output, based on the locking status, wherein the resultant signal is output when the locking status is detected, and the received input signal is output when the locking status is not detected.