Расчет комбинационных частот при фильтрации биоэлектрических потенциалов фазовым фильтром

The features of numerical realization of filter for registration of bioelectrical potentials were considered. Mentioned filter is based on the using of procedure of phase modulation of harmonic of special form impulse by harmonics of measurable signal with noise. It was shown that in order to receive the maximal value of modulation parameter, it is needed to ensure the hit of initial phase values of reference impulse as well as the impulse with measurable signal on the ends of quasy-linear part of relationship between phase value and impulse echelons ratio. The algorithm for calculation of reference impulse’s parameters and of multiplication factor for measurable signal implemented this condition was received. The methods for selection of combinational frequencies with amplitudes above preset threshold were suggested. The model calculation for assigned signal with random noise were carry out.