POTENTIAL ACCURACY OF ESTIMATING THE INFORMATION PARAMETER OF A HOMODYNE LASER DOPPLER VIBROMETER SIGNAL
V. A. Grechikhin, T. A. Khrennikova
Moscow Power Engineering Institute, 111250, Moscow, ul. Krasnokazarmennaya, 14
Keywords: гомодинный лазерный доплеровский виброметр, индекс модуляции сигнала, нижняя граница дисперсии оценки, homodyne laser Doppler vibrometer, signal modulation index, lower bound of the estimate variance
Abstract
This paper describes the analysis of the potential accuracy of estimating the signal modulation index of a homodyne laser Doppler vibrometer with frequency modulation and known and unknown non-information parameters of the signal. The Rao - Cramer inequality is used to obtain expressions for calculating the lower boundary of variance of the modulation index estimate and study its relationship with a signal/noise mixture. Recommendations on the choice of conditions for measuring the amplitude of vibro-displacement by the homodyne Doppler laser vibrometer are given.
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