Full-duplex transceiver with digital post-distortion to mitigate self-interference caused by transmit chains

A method of mitigating self-interference, comprising:

• converting a first digital baseband transmit signal into a first RF transmit signal in a first transmit path in a transceiver;
• transmitting the first RF transmit signal from the transceiver while receiving an RF receive signal at the transceiver;
• converting the RF receive signal into a digital baseband receive signal in a receive path in the transceiver;
• and
• processing the digital baseband receive signal responsive to a function of a first coupling coefficient that represents a self-interference coupling between the receive path and the first transmit path to mitigate a self-interference component in the digital baseband receive signal from the transmitting of the first RF transmit signal.

A method of mitigating self-interference, comprising:

• during a calibration phase:
• generating a first sequence of digital baseband calibration signals and a second sequence of digital baseband calibration signals, wherein the first sequence of digital baseband calibration signals is orthogonal to the second sequence of digital baseband calibration signals;
• converting the first sequence of digital baseband calibration signals into a first sequence of RF calibration signals while converting the second sequence of digital baseband calibration signals into a second sequence of RF calibration signals;
• receiving a first RF signal sequence over a receive path while transmitting the first sequence of RF calibration signals over a first transmit path and while transmitting the second sequence of RF calibration signals over a second transmit path;
• converting the first RF signal sequence into a sequence of digital baseband receive signals;
• and
• calculating a first coupling coefficient for the first transmit path by multiplying the sequence of digital baseband receive signals by the first sequence of digital baseband calibration signals.