High-linearity receiver with transmit leakage cancellation

An integrated circuit comprising:

• a downconverter to downconvert at a receive frequency an amplified signal based on an input signal and provide a downconverted signal;
• a notch filter to filter at a frequency different than the receive frequency the downconverted signal and provide a filtered signal;
• an upconverter to upconvert the filtered signal and provide a feedback signal;
• and
• a summer to cancel an undesired signal in the input signal based on the feedback signal.

A method comprising:

• downconverting at a receive frequency an amplified signal based on an input signal to obtain a downconverted signal;
• filtering at a frequency different than the receive frequency the downconverted signal with a notch filter to obtain a filtered signal;
• upconverting the filtered signal to obtain a feedback signal;
• and
• canceling an undesired signal in the input signal based on the feedback signal.

An apparatus comprising:

• means for downconverting at a receive frequency an amplified signal based on an input signal to obtain a downconverted signal;
• means for filtering at a frequency different than the receive frequency the downconverted signal with a notch filter to obtain a filtered signal;
• means for upconverting the filtered signal to obtain a feedback signal;
• and
• means for canceling an undesired signal in the input signal based on the feedback signal.