**
Analysis
of spectrum parameters of Doppler signal reflected from the moving extended object**

**V. M. Artyushenko**^{ 1}, V. I. Volovach^{ 2}

^{1} Finance and Technology Academy, Korolev, Russia

^{2 }Volga Region State University of Service, Togliatti, Russia

The paper is received on January 12, 2015

**Abstract.** It is shown that in the
analysis and implementation of short-range radio devices an extended nature of
the sensing object and the nature of the multipath signal reflections from the
object should be considered. The analysis of the parameters of the spectrum of Doppler
signal reflected from the moving extended object is of practical interest,
since it allows to determine the parameters of motion with great certainty, in
particular the speed and acceleration of an extended object. It is proved that
the width of the Doppler signal spectrum and, hence, the accuracy of speed measuring
of an extended object are the most influenced by its acceleration. In this case
there is a direct relation: the greater the acceleration, the wider the signal
spectrum. The results of experimental study of spectrum parameters of the
Doppler signal for different models of extended objects are discussed. Analysis
and generalization of the results was carried out on a large sample of
fragments of the spectrum of the Doppler signal, which allows us to consider
these results as statistically significant.

**Key words:** spectrum
of the Doppler signal, extended object, radio meter, speed, acceleration of the
motion, the effective surface scattering, the amplitude spectrum, phase
spectrum.

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