Patent ID: 8938066
Filing Date: 2015-01-20
Classification: H04M

Abstract:
1. A method, comprising: determining a first location of a first coefficient having a largest magnitude of a first plurality of magnitudes associated with a first plurality of coefficients of a first phase; determining a second location of a second coefficient having a largest magnitude of a second plurality of magnitudes associated with a second plurality of coefficients of a second phase different than the first phase; comparing a difference between the first and second locations to a threshold; and when the difference is less than the threshold, selecting one of the first and second locations to a calculate a first offset, wherein selecting the one of the first and second locations comprises selecting a greater of the magnitude of the first coefficient and the magnitude of the second coefficient; when the difference is greater than the threshold, selecting both of the first and second locations to calculate a second offset and a third offset, respectively; and cancelling an echo contained in a signal using either (1) the first offset or (2) the second and third offsets.