IQ METHODS AND APPARATUS FOR TRANSMIT IQ MISMATCH CALIBRATION

摘要

A method of pre-compensating for transmitter in-phase (I) and quadrature (Q) mismatch (IQMM) includes transmitting a signal through an up-converter in a transmit path to provide an up-converted signal, receiving the up-converted signal. determining via a down-converter of a feedback path, determining one or more IQMM parameters for the transmit path based on the determined up-converted signal, and based on the one or more IQMM parameters for the transmit path and determining one or more pre-compensation parameters for the transmit path. In some embodiments, the up-converted signal may be determined through a receive feedback path. In some embodiments, the up-converted signal may be determined through an envelope detector.