Vladimir V. Utkin – Ph.D.(Eng.), Associate Professor
Ivan V. Kolikov – Post-graduate Student
Aleksandr S. Bosyi – Ph.D.(Eng.), Scientific and Pedagogical Worker

A modern unmanned aerial vehicle is able not only to conduct unauthorized video filming of a protected area, but also to transport and transport prohibited goods to the territory of prisons and colonies or contraband across state borders, to have on board the simplest systems for the delivery and activation of explosive devices, which turns such an aircraft apparatus into a weapon capable of performing sabotage and terrorist missions. Thus, the development of methods for detecting and determining the main parameters of the trajectory of an unmanned aerial vehicle is an urgent task and has a pronounced practical significance.
The aim of the work is to develop a method for estimating the parameters of the movement of a radio emission source placed on an aircraft-type unmanned aerial vehicle, based on the model of changing the Doppler frequency addition of the radio emission source. Based on the goal, the tasks of the work are: development of a model for changing the Doppler frequency addition of an radio emission source located on an aircraft-type unmanned aerial vehicle; development of a method for estimating the parameters of the motion of radiation sources, based on the model of changing the Doppler frequency addition.
Within the framework of the work budget, the model of the change in the Doppler frequency addition of the radio emission source, placed on an aircraft-type unmanned aerial vehicle, moving along a circular or elliptical trajectory.
On the basis of the models of the Doppler frequency addition of the radio emission source, a method-estimated of the parameters of the movement of the radio emission source located on an aircraft-type unmanned aerial vehicle have been developed: time of movement of radio emission source along a circular path; time of movement of radio emission source along an extended section of an elliptical trajectory; time of movement of radio emission source along a circular section of an elliptical trajectory; the angle characterizing the relative position of the elliptical trajectory of the unmanned aerial vehicle and the means of the radio control device.  With the help of the proposed method for assessing the main temporal and geometric parameters of the movement of an radio emission source located on an aircraft-type unmanned aerial vehicle, it is possible to draw a conclusion about the tasks of the unmanned aerial vehicle in the process of unauthorized over flights of protected objects and other characteristics of the unmanned aerial vehicle, in the absence of technically complex antenna systems to ensure accurate unmanned aerial vehicle direction finding.

Utkin V.V., Kolikov I.V., Bosyi A.S. Method for evaluating the parameter of a radio emission source located on an unmanned aerial vehicle of an aircraft type, based on the Doppler effect. Electromagnetic waves and electronic systems. 2020. V. 25. № 6. P. 32−37. DOI: 10.18127/j15604128-202006-04. (in Russian)

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