Systems and methods for intelligently-tuned digital self-interference cancellation

A method for digital self-interference cancellation, comprising:

• during a first time interval, receiving a residue signal and a digital transmit sample from a communication system;
• generating a first reduced-noise digital residue signal based on the residue signal;
• at a controller, sampling a controller-sampled digital residue signal from at least one of the residue signal or the first reduced-noise digital residue signal;
• at the controller, determining a digital transform configuration based on the controller-sampled digital residue signal;
• based on the digital transform configuration, the digital transmit sample, and the first reduced-noise digital residue signal:
• generating a self-interference channel estimate associated with the first time interval;
• and
• based on the self-interference channel estimate and the digital transmit sample, generating a self-interference cancellation signal;
• wherein:
• during the first time interval, a previous self-interference cancellation signal is combined with a previous receive signal of the communication system to form the residue signal;
• and
• during a second time interval after the first time interval, the self-interference cancellation signal is combined with a current receive signal of the communication system to form a second residue signal.