Patent ID: 8238865
Filing Date: 2012-08-07
Classification: H04B

Abstract:
1. A system for calibrating image rejection of a receiver, the system comprising: an analog circuit element configured to modify the gain and phase of a baseband image signal in accordance with a control signal so as to produce a corrected image signal, wherein the baseband image signal comprises an in-phase signal and a quadrature signal; an image-rejection filter configured to receive the corrected image signal and to produce a filtered image signal based thereon; a power measurement circuit configured to determine a power level of the filtered image signal; a controller configured to analyze the power level and to generate a gain value and a phase value based on the power level analysis; and a decoder configured to generate the control signal, wherein the decoder is configured to decode the gain value and the phase value into a first coefficient of the control signal for control of a magnitude of the in-phase signal by the analog circuit element, and wherein the decoder is configured to decode the gain value and the phase value into a second coefficient of the control signal for control of a magnitude of the quadrature signal by the analog circuit element.