Waveform averaging techniques for non-correlated noise in interleaved ADC sample cores

While digital waveform averaging is effective at reducing uncorrelated error, it cannot distinguish the common waveform of interest from correlated errors, i.e., noise and distortion that is common across all waveforms. One source of correlated error can arise in the digitization process itself because of non-idealities in the sample interleaving process used in high-speed analog-to-digital converters (ADCs). Sample interleaving is a widely used technique to achieve high-sample rate digitization by employing multiple sub-sample rate ADC cores in parallel, but this can result in unwanted correlated errors in the waveform.