A phase mismatch compensation system includes a first summer that has a first input that communicates with a first phase of a received signal and an output. A second summer has a first input that communicates with a second phase of the received signal and an output, wherein the second phase is offset from the first phase. A first filter selectively filters the output of the first summer. An adaptive control module determines a predicted shift between the first and second phases of the received signal based on an output of the first filter and an actual shift between the first and second phases of the received signal. A correction module communicates with an output of the adaptive control module and the first phase and second phase of the received signal. The correction module outputs a mismatch correction to second inputs of the first and second summers respectively.
Frequency-selective and adaptive I/Q mismatch digital compensation