DC compensation system for a wireless communication device configured in a zero intermediate frequency architecture

A wireless communication device, comprising:

• a ZIF transceiver, comprising:
• an RF mixer circuit that converts an RF signal to a baseband input signal;
• a combiner that combines a DC offset with the baseband input signal to provide an adjusted baseband input signal;
• and
• a baseband amplifier that receives the adjusted baseband input signal and that asserts an amplified input signal based on a gain adjust signal;
• and
• a baseband processor, comprising:
• gain control logic that receives the amplified input signal, that estimates input signal power and that asserts the gain adjust signal in an attempt to keep the input signal power at a target power level;
• DC control logic that estimates an amount of DC in the amplified input signal and that provides the DC offset in an attempt to reduce DC in the amplified input signal;
• and
• a gain interface that converts gain levels between the gain control logic and the DC control logic.

A method of reducing DC in a wireless zero intermediate frequency (ZIF) device, comprising:

• converting a received radio frequency (RF) signal to a baseband signal;
• combining a DC offset with the baseband signal to achieve an adjusted baseband signal;
• amplifying the adjusted baseband signal based on a gain signal to achieve an amplified input signal;
• estimating a power level of an input baseband signal from the amplified input signal;
• adjusting the gain signal to achieve a target power level of the input baseband signal;
• measuring a DC level of the amplified input signal to obtain a DC estimate;
• amplifying the DC estimate based on a gain conversion signal to provide the DC offset;
• and
• generating the gain conversion signal based on the gain signal.