Transmitter self-jamming analog cancellation

A device capable of object detection, comprising:

• a transmit chain configured to transmit a transmit signal via a first antenna;
• a first receive chain configured to receive a first receive signal via a second antenna;
• a second receive chain configured to receive a second receive signal via a third antenna, the first receive signal and the second receive signal being associated with the transmit signal, wherein:
• the first receive chain comprises a first phase shifter configured to generate a first phase-shifted signal based on the first receive signal,
• the second receive chain comprises a second phase shifter configured to generate a second phase-shifted signal based on the second receive signal;
• and
• the first phase-shifted signal and the second phase-shifted signal are combined to generate a combined receive signal;
• and
• a control unit configured to control a phase-shift setting of at least one of the first phase shifter or the second phase shifter based on at least one of a mutual coupling component or a phase noise of the combined receive signal.

A method for object detection, comprising:

• transmitting a transmit signal via a first transmit chain coupled to a first antenna;
• receiving, via a second antenna, a receive signal including at least a mutual coupling component;
• processing the receive signal at a first receive chain coupled to the second antenna to generate a processed receive signal;
• and
• using a signal from a chain other than the first receive chain to at least partially cancel the mutual coupling component of the processed receive signal using an on-chip signal path.