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.