FIELD: radio equipment.
SUBSTANCE: for an initial signal specified by counts of instantaneous values at moments of time for a signal frequency sequence, a signal is determined - a result of multiplying the input signal by a sine of the reference frequency. Reference frequencies are set equal to the frequencies of the input multifrequency signal. Each reference sinusoidal signal is repeatedly shifted by discrete phase values. Signals generated after multiplying the input signal by reference signals are processed identically in the respective lines - each of the signals is branched into two identical components. First component is filtered by a low-pass filter (LPF), while the second component is filtered by a band-pass filter (BF). Selection of filters is carried out with phase-frequency and amplitude-frequency characteristics identical to each other. Signals counts are formed and sums of signals counts are found. Values of differences of obtained sums are calculated. Values of phases are stored.
EFFECT: high accuracy of estimating phases of multi-frequency periodic signals in conditions of interference.
1 cl, 2 dwg, 1 tbl
