METHOD OF MEASURING THE PHASE DIFFERENCE OF TWO QUASI-HARMONIC SIGNALS

摘要

FIELD: measuring equipment; optics.;SUBSTANCE: invention relates to optics, photonics and other fields of physics in which the problem of measuring the phase difference of two signals is significant, in particular when measuring distances in remote sensing systems, communication systems, in determining the geometric parameters of objects, and the like. Claimed method for measuring the phase difference of two quasi-harmonic signals is based on measuring the amplitudes of three signals: two original signals whose phase shift is measured and a third signal generated as the sum of the two original signals. Initial values of these amplitudes, which are not distorted by noise, are estimated by known methods of analysis of Rice data, for example, proposed in patents of the Russian Federation 2555501, 2556318, 2556319. Amplitudes of the three analyzed signals form a triangle, which makes it possible to calculate the desired phase difference of the two signals from simple geometric considerations.;EFFECT: technical result is a substantially simplified procedure for calculating the phase shift of two quasi-harmonic signals and high accuracy of measurements.;1 cl