Measurement Techniques

, Volume 59, Issue 7, pp 752–759 | Cite as

A Phase Method of Comparison of the Instantaneous Values of the Frequencies of Quasi-Harmonic Signals

  • V. K. Ignat’ev
  • A. A. Orlov
  • D. A. Stankevich

The present article considers a method of phase comparison of the instantaneous values of the frequencies of quasi-harmonic signals with slowly varying parameters, based on a parametric algorithm for estimation of the lag angle. It is shown that the errors of the method are comparable with the errors of the classical quadrature heterodyne method in comparing signals with constant frequency difference. The advantage of the proposed method lies in a four-fold reduction in the number of computational operations. The theoretical conclusions are supported by numerical and field experiments.


phase comparator instantaneous value of frequency analog-to-digital converter digital synthesis of signals parametric method 


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • V. K. Ignat’ev
    • 1
  • A. A. Orlov
    • 1
  • D. A. Stankevich
    • 1
  1. 1.Volgograd State UniversityVolgogradRussia

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