Circuit and method for filtering adjacent channel interferers

A method of filtering adjacent channel interferers of an in-band signal, comprising:

• receiving a radio frequency (RF) signal, including said in-band signal;
• down-converting said RF signal to a baseband signal;
• employing a controlled filter in filtering adjacent channel interference in said baseband signal and causing a predetermined attenuation in said in-band signal;
• employing a baseband circuit for multi-stage filtering of said baseband signal after said filtering of said adjacent channel interference, wherein said controlled filter is distinct from said baseband circuit;
• converting said baseband signal to a digital signal;
• and
• digitally compensating for said predetermined attenuation.

A radio frequency (RF) receiver, comprising:

• a mixer operable to down-convert a received RF signal to a baseband signal having an in-band component and an adjacent channel component;
• a controlled single pole filter electrically coupled to said mixer and configured to reject said adjacent channel component and cause a predetermined attenuation in said in-band component;
• a baseband circuit, electrically coupled to and distinct from said controlled single pole filter, configured to perform multi-stage filtering of said baseband signal;
• an analog-to-digital converter (ADC) electrically coupled to said baseband circuit and configured to convert said in-band component to a digital signal after said multi-stage filtering by said baseband circuit;
• and
• a digital signal processor (DSP) electrically coupled to said ADC and configured to compensate for said predetermined attenuation in said digital signal.