METHOD AND DEVICE FOR SIMULATING RADIO SIGNAL REFLECTED FROM AERIAL TARGET WITH TURBOJET ENGINE, IN CONDITIONS OF PASSIVE AND ACTIVE INTERFERENCE Russian patent published in 2024 - IPC G01S7/40 

FIELD: radar equipment.

SUBSTANCE: invention relates to the field of radar equipment and can be used in semi-natural simulation of radio wave propagation taking into account the specular-diffuse nature of scattering, reciprocating motion of composite elements of an aerial target, presence of passive and active interference and multiple re-reflections from the surface of artificial objects by providing real-time simulation of a radio signal reflected from a spatially distributed radio-physical scene, which is represented by surfaces of artificial objects with different electromagnetic properties: metal, glass, plastic, radio-absorbing materials, metamaterials. In the disclosed method, performing the transition to the reflected EMW beams power calculation, taking into account the specular-diffuse nature of scattering of the reflected electromagnetic wave and the angle of incidence of the electromagnetic wave on the plane of the LPC blades of the turbojet engine after re-reflection in the AID, taking into account the effect of passive EJ means and active simulating interferences. Forming a spectral Doppler portrait (SDP) of an air target with a turbojet engine, comparing it with experimental data from the claimed device and the parameters of the simulation model are corrected: the speed of rotation of the blades of the LPC stages of the turbojet engine F_rot, the number of scattering indicatrix (SI) beams of the EMW N_b, the number of beams of the beam pattern (BP) of the radio engineering system (RES) N_bRES, EMW SI amplification factors F_i(α_n) and other parameters) in the mathematical simulation environment of the disclosed device. At that, mechanical rotation of the turbojet engine model is performed in azimuthal and elevation planes by a value corresponding to the angle of incidence of the beam on the plane of the blades of the LPC stages of the turbojet engine after re-reflection in the AID. Also disclosed is a device, which additionally includes a simulator of passive EJ means and active imitating noise. On-board radar (OBR) signals simulator and means of imitating interference environment are made on the basis of SDR-platform, on a personal computer (PC) software is preinstalled, that is a mathematical modeling environment, software for controlling SDR, software for controlling operation of microcontrollers and a controller for controlling mechanization of a turbojet engine, communication between elements of the device is carried out via a USB protocol.

EFFECT: high accuracy of simulating the reflected radio signal by taking into account the specular-diffuse nature of scattering of the reflected electromagnetic wave (EMW) and the angle of incidence of EMW on the plane of the blades of the low-pressure compressor (LPC) of the turbojet engine (TJE) after re-reflection in the air intake device (AID), as well as broader functional capabilities owing to taking into account the effect of passive electronic jamming (EJ) means and active imitating interference.

2 cl, 4 dwg