Improving a method for detecting and measuring coordinates of a stealth aerial vehicle by a network of two small-sized radars

Abstract

The object of this study is the process of detecting and determining the coordinates of stealth unmanned aerial vehicles by a network of two small-sized radars. The main hypothesis of the study assumes that the use of two small-sized radars, which are connected in a network, could improve the quality of detection and determination of the coordinates of stealth unmanned aerial vehicles. The improved method for detecting and determining the coordinates of a stealth unmanned aerial vehicle, unlike the known ones, enables the following: – synchronous inspection of the airspace; – reception of the signal reflected from a stealth unmanned aerial vehicle by two small-sized radars; – carrying out coordinated filtering of incoming signals; – compensation of phase shifts and coherent addition of output signals from matched filters; – formation of Doppler channels in each small-sized radar and formation of a complex envelope from the output of the corresponding Doppler channel; – coherent processing (addition) of signals; – compensation of the random initial phase of signals reflected from a stealth unmanned aerial vehicle by detecting the output signal from the coherent adder; – measuring the range to a stealth unmanned aerial vehicle by each small-sized radar; – calculation of the coordinates of a stealth unmanned aerial vehicle. It was established that at low signal/noise values, the gain in terms of the conditional probability of correct detection is from 25 % to 32 %. It was determined that the use of a network of two small-sized radars makes it possible to reduce the mean square error in determining the coordinates of a stealth unmanned aerial vehicle from 28 % to 37 % on average