In a device for estimating a sampled value of an impulse response from input and output signals of a decision circuit which performs a signal decision procedure for reproducing a digital signal, there are provided a first part, operatively coupled to the decision circuit, for generating a first average of absolute values of samples of decided values obtained from the output signal of the decision circuit. A second part is also provided, operatively coupled to the decision circuit, for generating a second average of absolute values of samples of equalized outputs obtained from the input signal of the decision circuit. Also provided is a third part, operatively coupled to the first and second parts for generating a ratio of the first average and the second average, with the ratio being an estimate of the sampled value of the impulse response at a sampling point.