Investigation of an Operational Method for Measuring Frequency and Amplitude of Signals with Slowly Varying Parameters

A. V. Nikitin; A. O. Nikitin; A. A. Orlov

doi:10.1007/s11018-016-1004-3

Investigation of an Operational Method for Measuring Frequency and Amplitude of Signals with Slowly Varying Parameters

Authors: Nikitin A.V.¹, Nikitin A.O.¹, Orlov A.A.¹
Affiliations:
1. Volgograd State University
Issue: Vol 59, No 5 (2016)
Pages: 537-546
Section: Radio Measurements
URL: https://journals.rcsi.science/0543-1972/article/view/245345
DOI: https://doi.org/10.1007/s11018-016-1004-3
ID: 245345

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Abstract

We investigate a nonlinear parametric method of estimating the instantaneous frequency and amplitude of a quasi-harmonic signal. We obtain analytical expressions for variance estimates and their displacement, confirmed by numerical simulations. Experimental verification of the method on a real signal confirmed the ability to determine its frequency with a relative error less than 10^–5 in a time interval of about 30 periods of the test signal.