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Методы измерения фазы и временных параметров импульсов
С. 66–72.
Uvaysov S. U., Журков А. П., Aminev D., Козырев А. А.
When comparing two signals to characterize the differences in their states use the term phase shift, which refers to the difference between their phase angles for any time. To measure the phase and pulse temporal parameters exist a number of methods.