V.S. Nabilkin1

1 P.G. Demidov Yaroslavl State University (Yaroslavl, Russia)

Currently, there is an active development of radar systems, new systems are being developed and existing complexes are being modernized. There are a number of areas where it is necessary to ensure the protection of radar operation from detection and interference. In this case, a complex of technical and organizational measures is carried out aimed at increasing the secrecy of the useful signal in the radio channel. Studies show that the main signals used in radar (LFM and FCM) do not provide energy and structural stealth of radar stations. The solution to the problem may be the implementation of radio masking. When creating interference, the task arises of ensuring electromagnetic compatibility of the radio system and the source of masking interference. To date, this problem is solved by frequency or time division. Modern digital computing systems allow real-time analysis of the electromagnetic environment, to find the operating frequencies and operating mode of the detected device. To complicate the task of the scout, you can expand the range of variable parameters of the system. Therefore, it is interesting to consider the application of polarization separation methods based on the orthogonality properties of information and masking signals. The aim of the work is to substantiate the possibility of using spatially polarizing processing when using active masking interference to increase the stealth of radar signals. The following conclusions can be drawn. When increasing the stealth of radar system signals by the method of setting active masking interference, it is rational to use spatially polarizing interference compensation to preserve the operability of the protected radar. An algorithm for selecting the polarization parameters of masking interference for a signal with specified polarization parameters is proposed. Based on the technical characteristics of the radar station 19J6, it is possible to use the proposed algorithm to increase stealth when using the main lobe protection mode. The optimal polarization parameters for the interference will be the orientation angle of γП = [-p/4; p/4]; ellipticity of φП = [0; 2p). The obtained results can be used to increase the secrecy of radio engineering systems using polarization signal processing.

Nabilkin V.S. A method for increasing the energy and structural stealth of radar signals through the use of polarization-modulated interference. Radiotekhnika. 2022. V. 86. № 8. P. 60−69. DOI: https://doi.org/10.18127/j00338486-202208-07 (In Russian)

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