Patent ID: 6539068
Filing Date: 2003-03-25
Classification: H04B,H04L

Abstract:
A method of discriminating a desired Direct Broadcast Satellite (DBS) signal from a narrow band interfering signal, said DBS signal including sequential symbols representing digital values, the desired signal being discriminated from a narrow band interfering signal and said narrow band signal having a carrier frequency in the wide band, the method comprising:initially applying the DBS and narrow band interfering signals to a digital demodulator, wherein the DBS and narrow band interfering signals are amplified as a single, composite signal; passing the single, composite signal to a filter responsive to C-band signals so the single, composite signal is passed to an output of the filter, the filter having inputs for baseband I and Q components of the single, composite signal only and no other inputs; responding to the filter output to derive estimates of the values of received symbols of the desired single, composite signal; comparing the filter output with the estimated values of the received symbols to derive an error representing signal; and adjusting the filter in response to the error representing signal to reject the interfering signal and pass the desired signal.