SYSTEM FOR RADIO SUPPRESSION OF HOSTILE GNSS NAVIGATION USER EQUIPMENT, COMPATIBLE WITH LOCAL GNSS NAVIGATION USER EQUIPMENT

摘要

FIELD: radio engineering, communication.;SUBSTANCE: invention relates to electronic warfare and can be used for radio suppression of global navigation satellite system (GNSS) navigation user equipment. The system for radio suppression of hostile GNSS navigation user equipment, which is compatible with local GNSS navigation user equipment, consists of multiple jamming transmitters with a known, but concealed from the opponent, structure of the emitted interfering signal intended for radio suppression of the hostile GNSS navigation user equipment and local GNSS navigation user equipment, having between the receiving antenna and the local GNSS navigation user equipment a compensator unit with series-arranged compensators. Each compensator consists of a generator for generating a pattern of the interfering signal emitted by the jammer, a correlator, a decision device, a controlled delay element, a controlled attenuator, a subtractor and has an input to which output voltage of the receiving antenna or previous compensator is applied, and an output from which the output voltage is applied to the input of the next compensator or local GNSS navigation user equipment. Within the compensator, input voltage is applied to the first input of the subtractor and the first input of the correlators, and at the second input a pattern of the compensated signal generated by the generator for generating a pattern of the interfering signal, emitted by the jammer, the decision device to the input of which a numerical matrix is transmitted form the output of the correlator, said matrix characterising the relationship between the cross-correlation coefficient of the compensated signal and its pattern, generated by a reference signal generator, from the alignment errors of the compensated signal and a pattern thereof on time and on Doppler frequency, which determines the position of the global maximum of the cross-correlation coefficient on time and frequency axes, and based on the obtained results, generating and transmitting a control instruction to a reference signal generator for alignment of the compensated signal and a pattern thereof on Doppler frequency, to the controlled delay element for alignment of the received signal with a pattern thereof on delay time and to the controlled attenuator for alignment of the received signal with a pattern thereof on amplitude. The subtractor eliminates an additive mixture of received useful and noise radio signals of a pattern of a compensated signal, said mixture being transmitted to one of the inputs of the subtractor from the receiving antenna or the output of the preceding compensator.;EFFECT: improved compatibility of local GNSS navigation user equipment with local jamming transmitters of GNSS navigation user equipment without reducing effectiveness of radio suppression of hostile GNSS navigation user equipment.;2 dwg