T.A. Zhilnikov1, V.I. Zhulev2, A.A. Zhilnikov3

1,3 Academy of the Federal Penitentiary Service of Russia (Ryazan, Russia)

2 Ryazan State Radio Engineering University named after V.F. Utkin (Ryazan, Russia)

Determining the spatial location of an object is one of the main tasks of technical vision, which is currently being solved using various methods of traditional radar. The degree of informative visibility of a complex radar scene is largely due to the available viewing angles. When analyzing foreshortening, in comparison with the principles of monostatic location, when the direction of the received signal is strictly opposite to the direction of the probing signal of the transmitter, the principles of bistatic location, in which the transmitter and receiver are spaced apart, obviously look more functionally attractive. This, when explicitly using a bistatic location, a transition is made from mono-perspective to observing the scene from different angles. This creates conditions for the use of tomographic approaches, where it is required and produces a positive effect.

However, these advantages of bistatic location require that the transmitter and receiver be spaced at a distance comparable to the distance of reflecting objects. Unfortunately, compliance with the stated requirements of remoteness does not always fit into the concept and technical implementation of the tasks solved by the location. In this regard, there is a limited number of sensing angles, which, together with scattering, absorption and other effects, makes it possible to mask reflective objects in the path of the probing signal propagation.

During the observation of a complex radar scene, in the presence of obstacles limiting the line-of-sight zone and objects absorbing and scattering radiation relative to the sounding route, difficulties of sighting arise. These objects can be detected detected through the use of tomographic principles that require observation of the radar scene from all possible angles for it. At the same time, the quality and reliability of the reconstruction depends on how much the requirement of foreshortening declared by tomography will be met. However, during the location, it is not always technically possible to implement this, and in practice there is limited foreshortening. In this article, it is proposed to look for hidden resources to increase the informativeness of the location in factors that are actually considered interfering, and relate to interference, which in practice lead to multiple reflections, being the reasons for the appearance of images of imaginary objects. In this regard, in the presence of such reflections inside the scene, it is proposed to carry out ultra-wide-angle registration of the response to probing in the information channel, regardless of the principle of location, as well as to describe reflections in a certain way with the geometry of sight and supplement the missing angles necessary for reconstruction with them.

Zhilnikov T.A., Zhulev V.I., Zhilnikov A.A. The use of multiple reflections of a radio signal inside a complex radar scene as part of the implementation of technical vision. Biomedicine Radioengineering. 2023. V. 26. № 3. Р. 29-37. DOI: https://doi.org/10.18127/ j15604136-202303-04 (In Russian).

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