Systems and methods for interference cancellation

An apparatus comprising:

• an analog front-end (AFE) module configured to receive an input signal from a signal path mixed with an interference signal from a clock path;
• a phase interpolator (PI) circuit implemented in the clock path and configured to generate multiple phases of a clock signal;
• a track-and-hold (T/H) circuit configured to sample the input signal and the interference signal based on a timing rotated in the phases generated by the PI circuit in every cycle;
• an analog-to-digital converter (ADC) configured to provide an ADC digital output based on a sampled input signal and a sampled interference at each of the multiple phases;
• a digital-interference-cancellation (DIC) circuit configured to detect the sampled interference by demultiplexing the ADC digital output into multiple paths each comprising a digital adaptive loop;
• and
• an analog-interference-cancellation (AIC) circuit implemented in the clock path to generate a cancellation signal based on a calibration loop using control parameters from the DIC circuit and to inject the cancellation signal to the signal path for canceling at least a part of the interference signal.

A method comprising:

• receiving an input signal from a signal path mixed with an interference signal from a clock path;
• implementing a phase interpolator (PI) in the clock path to generate multiple phases of a clock signal;
• sampling the input signal and the interference signal based on a timing rotated in the phases generated by the PI in every cycle;
• providing an ADC digital output based on a sampled input signal and a sampled interference at each of the phases;
• detecting the sampled interference by demultiplexing the ADC digital output and canceling at least partially a component of the interference signal in each demultiplexed path using a digital adaptive loop to calibrate the sampled interference;
• generating an analog cancellation signal based on a calibration loop using control parameters determined in the digital adaptive loop;
• and
• injecting the analog cancellation signal into the signal path for at least canceling a part of the interference signal.