Patent ID: 8265584

Claim:
An apparatus comprising: a signal channel path including a first mixer to receive an intermediate frequency (IF) signal and to downconvert the IF signal to a signal channel baseband signal; an image channel path including a second mixer to receive the IF signal and to downconvert the IF signal to an image channel baseband signal; an image rejection calibration unit to receive the signal channel baseband signal and the image channel baseband signal and including: a signal filter to receive a value of the signal channel baseband signal and to generate a filtered signal channel value; a first combiner to combine the signal channel baseband signal with a filtered image channel value to obtain a signal channel path output; an image filter to receive a value of the image channel baseband signal and to generate the filtered image channel value; a second combiner to combine the image channel baseband signal with the filtered signal channel value to obtain an image channel path output; and a signal correlator to correlate a current sample of the image channel path output with a current sample and at least one previous sample of the signal channel path output.