Patent ID: 7542531
Filing Date: 2009-06-02
Classification: H03D,H04L

Abstract:
1. A method of estimating a spectral component of interference at a particular frequency, comprising: selecting a frequency of interest from a first plurality of frequencies in a frequency band; generating the frequency domain data for the first plurality of frequencies; determining whether there is interference at any one of the first plurality of frequencies; determining the peak output of the frequency domain data at a location in the frequency band where the interference spectral components dominate; selecting the frequency domain data from a second plurality of frequencies near the spectral peak of the interference among the first plurality of frequencies; obtaining a first set of coefficients using linear combinations of the frequency domain data of the second plurality of frequencies using a second set of coefficients that are pre-computed and stored in a look-up table; and quantifying the interference component using an interface canceller at at the frequency of interest using a Taylor series on the reciprocal of the spectral distance between the frequency of interest and the spectral peak of the interference using the first set of coefficients, wherein the Taylor series estimates the spectral components of the interference generally in the form of 1/(m-½), where m is an integer and (m-½) is a normalized approximate distance between a frequency of interest and the center frequency of the interference.