Duality of I/Q imbalance in RF mixer: Application to the L1-norm based estimation and generalization to the SVD based model

Abstract

This paper addresses the duality between the gain/phase mismatch in the I/Q imbalance model of RF transceiver IC. The newly proposed L 1 -norm based estimator exploiting this duality can serve as a sound alternative to the existing L 2 -norm based estimator significantly lowering the implementation cost. Generalization of this duality empowers the single skew matrix representation of the I/Q imbalance model, mappable to an always existing unique SVD based model, to extend its compensation range limited too conservative so far with much higher level of confidence than ever before.