Signal-equalization with noise-whitening filter

A noise-filtering circuit for use with an equalization circuit that is designed to provide equalization on an input signal by converging on symbols of the input signal via operation in a frequency domain, the noise-filtering circuit comprising:

• a noise-whitening filter and a noise predictor, the noise-whitening filter and the noise predictor being configured and arranged to filter colored noise from a signal responsive to the equalization circuit;
• an activation-control circuit configured and arranged to effectively enable and disable colored-noise filtering performed by the noise-whitening filter;
• and
• a sequencer circuit configured and arranged to generate a control signal that enables colored-noise filtering performed by the noise-whitening filter in response to an indication of convergence of the symbols of the input signal and to disable colored-noise filtering performed by the noise-whitening filter for a period before the indication.