a transmit chain comprising a first digital-to-analog converter (DAC) and a power amplifier, wherein the transmit chain produces an analog transmit signal;

a receiver chain comprising a first analog-to-digital converter (ADC);

a second DAC;

a digital signal processor comprising an adaptive signal cancellation digital signal processing (DSP) algorithm, the digital signal processor coupled to an output of the first ADC and coupled to an input of the second DAC; and

a summer coupled to an output the second DAC and coupled to an input of the first ADC,

wherein the digital signal processor produces a digital cancellation signal, the second DAC converts the digital cancellation signal into an analog digital cancellation signal, the summer receives an analog receive signal comprising a self-interference signal, and the analog digital cancellation signal represents an out-of-phase version of the self-interference signal.