Patent ID: 6456673
Filing Date: 2002-09-24
Classification: H04B,H04L

Abstract:
A receiver for a multicarrier modulation system, comprising:an analog-to-digital (A/D) converter, said A/D converter receives analog signals that have been transmitted to said receiver over a transmission media and converts the analog signals to digital time domain signals; a multicarrier demodulator operatively connected to said A/D converter, said multicarrier demodulator receives the digital time domain signals and converts the digital time domain signals into digital frequency domain data; a digital RF interference canceller operatively coupled to said multicarrier demodulator, said digital RF interference canceller mitigates the effect of RF interference on the digital frequency domain data by modeling the RF interference in accordance with a frequency domain model; and the digital frequency domain data is provided on a plurality of frequency tones used by the multicarrier modulation system, and wherein the frequency domain model is produced in accordance with the following equation: RFIn+m=[&Sum;k=1MO+1&it;Ak(m-Î´)k]where RFIn+m is the RF interference at a frequency tone n+m due to a radio interferer at frequency (n+&dgr;),&dgr; is an offset amount, MO is a model order for the frequency domain model, and Ak is a complex number.