Two stage radio frequency interference cancellation system and method

An interference suppression system, comprising:

• an input configured to receive a combined signal comprising a signal of interest conveying information and an interfering signal present in a common signal band;
• an automated digitally-controlled model-based signal generator configured to generate an analog signal having a controllable delay and magnitude selectively corresponding to a predicted future state of the interfering signal;
• a first combiner configured to combine the combined signal with the generated analog signal with the delay and magnitude controlled to at least partially reduce a ratio of a power of the interfering signal and the signal of interest, to produce a model-based interference suppressed signal;
• a second combiner configured to combine the model-based interference suppressed signal with a feedback-controlled cancellation signal to produce an output signal;
• and
• a cancellation signal generator, configured to generate the feedback-controlled cancellation signal, based on at least the output signal.

A signal distinguishing method, comprising:

• receiving a combined signal comprising a first signal and a second signal present in a common signal band;
• predictively modeling future states of the second signal using at least one automated processor;
• combining the combined signal with an analog signal representing the predictively modeled future states of the second signal, having a delay and magnitude adjusted to at least partially reduce a ratio of a power of the second signal and the first signal, to produce a model-based interference suppressed signal;
• combining the model-based interference suppressed signal with a feedback-controlled cancellation signal to produce an output signal;
• and
• generating the feedback-controlled cancellation signal with at least one digital processor, based on at least the output signal.