Patent ID: 6925132

Claim:
A method for detecting and correcting amplitude and phase imbalances between in-phase (I) and quadrature-phase (Q) components in a high-speed wireless communication quadrature demodulator, comprising: a) comparing an input signal with a signal determined by a quadrant to which the input signal belongs, and detecting imbalances between I and Q components with respect to the input signal; and b) using the imbalances detected in a) to correct the input signal, wherein a) comprises: 1) determining a quadrant position of the input signal; 2) using the quadrant position determined in 1) to determine the input signal with respect to respective quadrants; 3) respectively determining the signals determined with respect to respective quadrants in 2); 4) subtracting the determined signals in 3) from the determined signals in 2); and 5) averaging the respective subtracted signals to output the amplitude and phase imbalances between I and Q components.