Patent ID: 10873360

Abstract:
Systems, methods, and circuitries are disclosed for performing self-interference cancellation in a transceiver. In one example, a self-interference cancellation system includes a cancellation signal circuitry, cancellation circuitry, down-conversion circuitry, and an LO derivation circuitry. The cancellation signal circuitry is configured to use a cancellation transmit (TX) local oscillator (LO) signal to up-convert a baseband transmit leakage replica signal to generate a cancellation signal. The cancellation circuitry is configured to combine the cancellation signal with a received signal to generate a corrected received signal. The down-conversion circuitry is configured to use a receive (RX) LO signal to down-convert the corrected received signal to generate a baseband received signal. The LO derivation circuitry is configured to derive the cancellation TX LO signal and the RX LO signal from a common LO signal.