Patent ID: 8508397
Filing Date: 2013-08-13
Classification: H03M

Abstract:
1. An apparatus comprising: a splitter module configured to split an analog input signal into a first analog signal output on a first signal branch, and a second analog signal output on a second signal branch; a first analog/digital converter configured to digitize the first analog signal into a first digital signal; a second analog/digital converter configured to digitize the second analog signal into a second digital signal; a first switching module configured to switch one of the first signal branch and the second signal branch to an output of the apparatus; a first regulating module, disposed between the second analog/digital converter and the first switching module, wherein the first regulating module is configured to adaptively match amplitudes of the second digital signal to amplitudes of the first digital signal; and a delay module, disposed between the first analog/digital converter and the first switching module, wherein the delay module is configured to delay the first digital signal by a time corresponding to a processing time of the first regulating module, and wherein the delay module provides the delayed first digital signal as a reference signal to the first regulating module, wherein the first regulating module comprises an adaptive filter configured to filter the second digital signal, wherein filter coefficients of the adaptive filter are configured to be matched in a cyclical manner by the reference signal, such that the filtered second digital signal corresponds to the reference signal in phase and amplitude.