System for the correction of amplitude and phase errors of in-quadrature signals, corresponding receiver and method

A receiver system comprising:

• a receiver circuit;
• and
• an error correction circuit coupled to said receiver circuit and for phase and amplitude correction, the error correction circuit comprising
• first and second adders each configured to
• supply, respectively, a first output signal and a second output signal,
• compute a sum of a first input signal and a second input signal, the sum being weighted via a respective first coefficient and a respective second coefficient, and
• multiply the weighted sum by a third coefficient;
• at least one of the first coefficient and the second coefficient of said first adder configured to enable correction of the phase errors using variable phase shift in terms of phase correction and a fixed amplitude correction;
• the third coefficient of said second adder configured to enable correction of the amplitude errors with a fixed phase shift in terms of phase correction and a variable amplitude correction.

A method for correction of phase and amplitude errors, the method comprising:

• operating each of first and second adders to
• supply, respectively, a first output signal and a second output signal,
• compute a sum of a first input signal and a second input signal, the sum being weighted via a respective first coefficient and a respective second coefficient, and
• multiply the weighted sum by a third coefficient;
• setting at least one of the first coefficient and the second coefficient of the first adder to enable correction of the phase errors using variable phase shift in terms of phase correction and a fixed amplitude correction;
• and
• setting the third coefficient of the second adder to enable correction of the amplitude errors with a fixed phase shift in terms of phase correction and a variable amplitude correction.