ELECTRODYNAMIC PARAMETERS OF NONSTATIONARY SYSTEMS DEFINITION

 

Vjacheslav K. Ignatjev, Andrey V. Nikitin, Sergey V. Yushanov

Radiophysics department of Volgograd State University

 

Received July 27, 2011

 

Abstract. The digital parametric algorithm of allocation the envelope and instantaneous frequency of a quasiharmonic signal is described. The conditions of their unique physical properties due to the time-dependent system which are a source of a signal are resulted. Experiments with time-dependent system, which is an oscillatory circuit with variable capacitance, are executed. The variation of capacity restored with high precision by the response of the system in a harmonious signal.

Key words: slowly varying parameters, inverse problem, indirect measurements, oscillatory circuit, quasi-harmonic signal, instantaneous frequency, envelope.