Processing of signals at the multiradar system on the basis of surveillance two coordinate radars

Abstract

The subject of research in this work is the problem of developing methods for signal processing in a multi-radar system based on two-coordinate surveillance radar stations with mechanical azimuth rotation. The aim of the article is to improve the quality of airborne objects detection 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 separated coherent multi-radar system. The processing of radar information from individual positions of such spatially separated systems is carried out in the central information processing point, which can be combined with one of the positions or located separately. At such a point, it is advisable to carry out joint processing of radar information, the efficiency of which depends on the degree of coherence that is provided in the system. The synthesis of optimal detectors of coherent and incoherent signals is carried out in the work. The characteristics of air object detection in a multi-radar system with compatible signal reception are evaluated. The results obtained: increasing the number of radar stations in the system, regardless of the degree of signal coherence, showed the greatest efficiency in terms of increasing the signal-to-noise ratio when moving from a stand-alone radar station to a two element system, the rational number of radar stations in a multi-radar system should not exceed four. The expected signal-to-noise 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.