Various embodiments are disclosed relating to a wireless transceiver. In an example embodiment, a wireless transceiver may include a transmitter adapted to output a signal at an image frequency (e.g., a simulated image) for a channel during a first mode (e.g., calibration mode) of operation. The wireless transceiver also includes a receiver adapted to receive, via loopback from the transmitter, the (e.g., simulated) image frequency signal and to determine digitally a receiver in-phase/quadrature-phase (I/Q) signal calibration adjustment based on the (simulated) image frequency signal to improve a match in amplitude and a predetermined phase shift between I and Q signals of the receiver during the first (e.g., calibration) mode of operation. The I/Q calibration adjustment may be applied to received signals during a second mode (e.g., operation mode) of operation to improve image rejection.