Patent ID: 9054938
Filing Date: 2015-06-09
Classification: H04L

Abstract:
1. A method, comprising: generating a squared signal, in an analog domain, from an intermediary frequency (IF) signal that is an output of a quadrature tuner, wherein the generating the squared signal comprises generating a phase error component and a gain error component associated with the quadrature tuner, wherein further the quadrature tuner comprises an up-conversion stage, a base-band, and a down-conversion stage; determining, in the analog domain via frequency translation of at least one signal of the phase error component and the gain error component, at least one of a phase error and a gain error, wherein the frequency translation comprises down-converting the at least one signal to direct current (DC) to enable determination of the at least one of the phase error and the gain error, wherein generating the squared signal and determining the at least one of the phase error and the gain error are enabled without test tone injection, wherein the determining the at least one of the phase error and the gain error comprises attenuating components of the squared signal outside a band centered at a frequency equal to two times the frequency of the IF signal; and generating an adjusted signal as the output of the quadrature tuner by application of at least one of a phase correction signal to a variable delay element in the up-conversion stage of the quadrature tuner and a gain correction value to an adjustable gain element in the base-band of the quadrature tuner, wherein the at least one of the phase correction signal and the gain correction value is generated via the determining the at least one of the phase error and the gain error.