A review of methods for estimating signal parameters and the synthesis of devices
for estimating and measuring their frequency showed that there are a large number of different
options for constructing frequency discriminators. On this basis, open and tracking meters can
be implemented on various elements. Each of them brings its own specifics to the processing
of radio signals in the frequency measurement channels. Such a variety of measuring elements
and structures prescribes different approaches to their research, but only relatively simple
devices can be analyzed analytically, although most often under significant restrictive
assumptions. Others, more complex and with less stringent constraints, can be studied through
computer modeling or hybrid modeling approaches. The ultimate and most preferred method
for analyzing the accuracy of frequency discriminators and meters based on them should be
considered an experimental study in laboratory or natural conditions, which allows obtaining
the most reliable and valuable results.
Keywords: Acousto-optic spectrum analyzers, Fluctuation, Frequency discriminator, Gaussian pulse, Multi-channel filtering, Optimization methods, Radio frequency meters, Signal-to-noise ratio, Spectral density.
