ADAPTIVE IQ IMBALANCE ESTIMATION

摘要

A transceiver includes an input node to receive an input signal having in-phase (I) data and quadrature (Q) data, the input signal including several data samples. A correlation module determines an autocorrelation of the in-phase data, an autocorrelation of the quadrature data, a difference between the autocorrelation of the in-phase data and the autocorrelation of the quadrature data, and a cross correlation between the in-phase data and the quadrature data. An averaging module determines an average of the difference between the autocorrelation of the in-phase data and the autocorrelation of the quadrature data, and an average of the cross correlation between the in-phase data and the quadrature data, in which the averages are determined over a specified number of data samples. A compensation module, based on the average difference between the autocorrelation of the in-phase data and the autocorrelation of the quadrature data, and the average cross correlation between the in-phase data and the quadrature data, determines compensated in-phase data and quadrature data having reduced IQ mismatch.

主权项

1. An apparatus comprising:
an input node to receive a first signal having in-phase (I) data and quadrature (Q) data, the first signal comprising a plurality of data samples; a correlation module to determine an autocorrelation of the in-phase data, an autocorrelation of the quadrature data, a difference between the autocorrelation of the inphase data and the autocorrelation of the quadrature data, and a cross correlation between the in-phase data and the quadrature data; an averaging module to determine an average of the difference between the autocorrelation of the in-phase data and the autocorrelation of the quadrature data, and an average of the cross correlation between the in-phase data and the quadrature data, the averages being determined over a specified number of data samples; and a compensation module to, based on the average difference between the autocorrelation of the in-phase data and the autocorrelation of the quadrature data, and the average cross correlation between the in-phase data and the quadrature data, determine compensated in-phase data and quadrature data having reduced IQ mismatch.