Patent ID: 9094079
Filing Date: 2015-07-28
Classification: G01S,H03D,H03J,H04B,H04L

Abstract:
1. A digital wireless receiver for receiving a data signal, wherein the receiver has a signal path comprising a quadrature downconverter configured to receive a radio frequency (RF) signal corresponding to the data signal and output an in-phase component and a quadrature component at an intermediate frequency (IF), an IF rotation block configured to downconvert the in-phase component and quadrature component to baseband and an in-phase (I)-quadrature (Q) correction block configured to compensate for a modeled I-Q imbalance in the received signal, wherein the I-Q correction block is positioned downstream from the IF rotation block in the signal path; wherein upconversion of the data signal to IF is modeled by a matrix A and wherein the IF rotation block is configured to perform an operation corresponding to multiplication by an inverse of matrix A, matrix A wherein the I-Q imbalance is modeled as a matrix B and wherein the I-Q correction block is configured to perform a matrix multiplication by A