Transceiver I/Q mismatch calibration

摘要

A calibration mechanism is disclosed for performing I/Q mismatch calibration operations in a wireless communication device comprising a receiver unit and a transmitter unit. During an I/Q mismatch calibration mode, a first signal and a second signal are provided from the transmitter unit to the receiver unit via a loopback path coupled between the transmitter and receiver units. A phase shift is added to the second signal that is provided to the receiver unit. A first set of I/Q measurements is determined from the first signal and a second set of I/Q measurements is determined from the second signal with the added phase shift. Transmitter and receiver I/Q mismatch parameters are calculated based on the first and second sets of I/Q measurements. The receiver and transceiver I/Q mismatch parameters are used to compensate for I/Q mismatch at the receiver and transmitter units, respectively.