Patent ID: 8446995

Claim:
A method for correcting In-phase/Quadrature (IQ) imbalance of baseband signals in a wireless communication receiver, comprising: receiving, by the receiver, Radio Frequency (RF) signals, and processing the signals to generate an In-phase (I) signal and a Quadrature (Q) signal; calculating an autocorrelation value E(|I| 2 ) of the I signal, an autocorrelation value E(|Q| 2 ) of the Q signal, and a cross-correlation value E(IQ) of the I signal and the Q signal; calculating an estimate value Â n of a current amplitude imbalance calibration factor and an estimate value {circumflex over (P)} n of a current phase imbalance calibration factor as follows: A ^ = E ⁡ (  I  2 ) - E ⁡ (  Q  2 ) 2 × E ⁡ (  Q  2 ) ⁢ ⁢ and ⁢ ⁢ P ^ = - ( 1 + A ^ ) × E ⁡ ( IQ ) E ⁡ (  I  2 ) ; and correcting the Q signal according to the Â n and {circumflex over (P)} n .