Radio frequency communication systems with discrete time cancellation for coexistence management

A transceiver comprising:

• a receive channel configured to process a radio frequency receive signal to generate a digital baseband receive signal;
• an observation channel configured to process a radio frequency observation signal to generate a digital observation signal;
• a baseband sampling circuit configured to sample the digital observation signal to generate first digital observation data;
• an output configured to output the first digital observation data;
• an input configured to receive second digital observation data;
• and
• a discrete time cancellation circuit configured to compensate the digital baseband receive signal for radio frequency signal leakage based on the second digital observation data.

A method of coexistence management in a mobile device, the method comprising:

• providing a radio frequency receive signal from a first front end system to a first transceiver;
• processing the radio frequency receive signal to generate a first digital baseband receive signal using the first transceiver;
• compensating the first digital baseband receive signal for radio frequency signal leakage based on digital observation data using a discrete time cancellation circuit of the first transceiver;
• generating a radio frequency observation signal based on observing a radio frequency transmit signal using a second front end system;
• and
• processing the radio frequency observation signal to generate the digital observation data using a second transceiver.