Patent ID: 6859641
Filing Date: 2005-02-22
Classification: H04B,Y02D

Abstract:
1. A method of canceling an interfering signal contained in a received signal which includes a signal of interest, the interfering signal being a delayed and frequency offset version of a transmitted signal from the location of the received signal, the method comprising converting the received signal and a sample of the transmitted signal to digital form; tracking variations in delay, frequency offset and frequency dependent gain and phase variation between the interfering signal and the sample of the transmitted signal to produce a compensating signal; combining the compensating signal and the received signal to cancel the interfering signal and produce the signal of interest; generating an error signal from the signal of interest representing any uncanceled components of the interfering signal in the signal of interest; and controlling said tracking with the error signal to minimize offsets between the compensating signal and the interfering signal.