In transmission messages, the prediction about the form of every information signal, as a rule, is carried out using response of communication channel on test impulses. To avoid errors in predictions of intersymbol interference it is useful to apply the jump of carrier frequencies from one test impulse to another one. In this case it is necessary to make an estimate of channel impulse response in frequency band of information signals from channel response on series of test impulses, which transmitted in different frequency bands. Our article focuses on the algorithms for this estimation.