Abstract
The subject of research in the paper is the problem of developing methods of signal processing in a multiradar system of the same type of two-coordinate surveillance radars with mechanical rotation. The aim of the paper is to improve the quality of detection of air objects by combining the same type of two-coordinate radars in a multi-radar system. It is proposed to combine the existing surveillance radar stations into a spatially spaced coherent multi-radar system. The synthesis of optimal detectors of coherent and incoherent signals is carried out. The characteristics of detection of air objects in a multi-radar system with compatible signal receiving have been evaluated. The obtained results: the addition of the second radar, regardless of the degree of signal coherence, showed the greatest efficiency in the gain in terms of signal / noise, the optimal number of radars in the multi-radar system is not more than four. The expected signal / noise threshold gain in a system of four radars can be up to eighteen decibels for a system with coherent signals and up to eleven decibels for a system with incoherent signals. The using of more than four radars is impractical.
Highlights
From the experience of the Joint Forces operation in eastern Ukraine, it is known that small unmanned aerial vehicles (UAVs) in most cases were not detected by the available means of radar of radio troops [2,3,4,5,6,7], which form the basis of the air defence intelligence subsystem
The use of more than four radars is impractical, as it does not lead to a significant increase in gain
It can be argued that the greatest gain in terms of signal / noise showed the addition of second radar to the system and the optimal number of radars in a multiradar system is not more than four
Summary
In the context of modern local armed conflicts, hostilities in eastern Ukraine, the construction of a reliable radar reconnaissance of airspace is significantly complicated by the appearance of inconspicuous (with low radar contrast) and small air objects [1,2]. The radar troops of the Air Force of the Armed Forces of Ukraine receive the latest and modernized models of radar, including broadband phase-lodged signals and digital phased array antennas, but this process is gradual and expensive. In general, the existing equipment of the units does not provide a complete solution to the tasks assigned to the units, especially in the part relating to the detection of inconspicuous air object
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