Transmitter noise suppression in receiver

A system comprising:

• a main receiver configured to amplify and downconvert an analog radio frequency receive signal to provide a digital receive signal;
• a transmitter configured to upconvert and amplify a digital transmit signal to provide an analog radio frequency transmit signal at an output of the transmitter, the analog radio frequency transmit signal comprising a desired signal in a transmit band of the transmitter and transmitter noise in a receive band of the main receiver;
• a secondary receiver configured to obtain a secondary receiver input signal representative of at least the transmitter noise in the receive band of the main receiver, the secondary receiver being configured to process the secondary receiver input signal to output a digital feedforward signal;
• and
• a digital feedforward transmit noise cancellation subsystem configured to:
• generate a digital transmitter noise cancellation signal representative of the transmitter noise in the receive band of the main receiver based on the digital feedforward signal;
• and
• subtract the digital transmitter noise cancellation signal from the digital receive signal output by the main receiver to provide a compensated digital receive signal.