Patent ID: 9264156
Filing Date: 2016-02-16
CPC Classification: H04B,H04L

Claim Text:
1. A method of calibrating a receiver apparatus comprising at least one analog signal processing component and an intermediate frequency (IF) mixer for converting IF signals comprising an in-phase (I) signal and a quadrature-phase (Q) signal to baseband frequency signals, wherein the IF mixer is arranged downstream of the at least one analog signal processing component, the method comprising: determining, in a digital signal processing domain downstream of the IF mixer, a metric which is affected by a frequency-dependency of an imbalance between the I signal and the Q signal (IQ-imbalance) over a signal bandwidth; generating, based on the metric thus determined, a calibration signal configured to at least partially compensate a frequency-dependency of the IQ-imbalance; feeding the calibration signal upstream of the IF mixer to the at least one analog signal processing component so as to calibrate the at least one analog signal processing component.