Patent ID: 8583064
Filing Date: 2013-11-12
Classification: H03D,H04B,H04L

Abstract:
1. A receiver comprising: a first mixer configured to provide an in-phase (I) component of a radio frequency (RF) signal to an I channel by down-converting the RF signal wirelessly received; a second mixer configured to provide a quadrature (Q) component of the RF signal to a Q channel by down-converting the RF signal; amplification means, arranged on the I and Q channels, configured to amplify the I and Q components; a mismatch estimator configured to convert the amplified I and Q components into a frequency domain, and estimate a gain mismatch value and a phase mismatch value on the basis of the converted components, and a mismatch compensator configured to compensate for mismatch of the amplified I and Q components on the basis of the estimated gain and phase mismatch values, wherein the mismatch estimator estimates a mismatch value from the converted components on the basis of a product of two value positioned symmetrically with respect to a direct current (DC) component.