FIELD: radar and measurement technology. SUBSTANCE: N and N-1 digital values of input signal are found simultaneously, numbers of maximum spectral components obtained as result of Fourier transform, including additional sampling of input signal, are determined and N+1 points obtained, number of maximum spectral component of newly obtained spectrum is determined by means of digital Fourier transform, and numbers of maximum spectral components obtained are used to calculated absolute value of signal frequency with aid of definite equations. EFFECT: higher efficiency. 1 dwg
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