A system including first and second filters and an adaptation engine. The first filter includes first taps that receive first coefficients and filters a digital signal to generate a first filtered signal. One of the first coefficients is constrained, such that the one of the first coefficients are not updated and phase and gain errors are introduced. The second filter includes second taps that receive second coefficients and filters the first filtered signal to generate a second filtered signal. The second coefficients include first and second coefficients. The adaptation engine, based on the one of the first coefficients, updates: the first coefficient to set a phase of the second filter; and the second coefficient to set a gain of the second filter. The phase of the second filter corresponds to a change in the phase error. The gain of the second filter corresponds to a change in the gain error.