Errors of phase shift measuring by algorithmic sum-difference methods from amplitudes inequality and their reduction methods
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Date
2016
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Publishing House of Lviv Polytechnic National University
Abstract
This paper analyzes the errors entailed by the
signal amplitude inequality when measuring the phase shift
among low frequency harmonic signals for algorithmic
sum-difference methods. It is shown that additional phase
shifts of summary and difference signals caused by the
inequality of compared signals in some methods affect the
errors, whereas in others they do not. A method in which
there is no additive component of the error has been found.
This method has been admitted to be the best to measure
small phase shifts. The method for measuring the phase shift, which
enables to avoid errors due to amplitude inequality of
compared signals has been proposed.
Description
Keywords
errors, harmonic signals, signal amplitude inequality, phase measuring, low frequency, sum-difference method, amplitude errors
Citation
Buchma I. Errors of phase shift measuring by algorithmic sum-difference methods from amplitudes inequality and their reduction methods / Ihor Buchma // Advances in Cyber-Physical Systems. – 2016. – Volume 1, number 1. – P. 23–30. – Bibliography: 6 titles.