Digital processing radio receiver with adaptive bandwidth control

A method for digitally processing an intermediate frequency (IF) signal, comprising the steps of:

• generating a carrier-based signal in an analog broadcast tuner in response to a broadcast signal from an antenna, said analog broadcast tuner applying automatic gain control to said carrier-based signal in order to provide a predetermined signal level;
• digitizing said carrier-based signal;
• selecting a first bank of filter coefficients for a filter processor to provide a finite impulse response with a first bandwidth;
• filtering said carrier-based signal in said filter processor to generate a filtered IF signal;
• generating a first level signal in response to a signal level of said filtered IF signal;
• comparing said first signal level with a predetermined threshold;
• and
• selecting a second bank of filter coefficients for said filter processor to provide an impulse response with a second bandwidth narrower than said first bandwidth if said first signal level is greater than said predetermined threshold.