Patent ID: 6727936
Filing Date: 2004-04-27
Classification: H04B,H04L,H04N

Abstract:
A method for rejecting at least one particular interference frequency component from an input frequency spectrum, the method comprising:shifting the input spectrum in the frequency domain down by a first selected amount, thereby positioning the particular interference frequency component about DC, as a result of the shift; canceling the shifted input spectrum in the region about DC in order to remove the particular interference frequency component from the input spectrum; shifting the input spectrum in the frequency domain up by a second selected amount equal to the first selected amount; additionally shifting the input spectrum in the frequency domain down by a third selected amount, thereby positioning an additional interference frequency component about DC as a result of the additional shift; canceling the additionally shifted input spectrum in the region about DC in order to remove the additional interference frequency component from the input spectrum; and shifting the input spectrum in the frequency domain up by a fourth selected amount.