PULSE-DOPPLER AIRBORNE RADAR STATION OPERATING METHOD DURING DETECTING OF AIR TARGET - CARRIER OF RADIO INTELLIGENCE AND ACTIVE INTERFERENCE STATIONS Russian patent published in 2019 - IPC G01S13/52 

FIELD: radar ranging.

SUBSTANCE: invention relates to the field of radar and can be used to improve the noise immunity of a pulse-Doppler airborne radar (ABR) when it is operating on radiation and detecting an air target (AT) - carrier of radio intelligence (RI) and active interference (AI) stations. Method consists in the formation of a high-frequency sequence of probe pulses at the original carrier frequency f₁, their amplification in power, radiation in the direction of the AT - carrier of RI stations and AI, the conversion of the reflected signals to intermediate frequencies, their selection in range and Doppler frequency, the conversion of signals into digital form, followed by their spectral analysis, at each reception of the signal reflected from the AT - carrier of the RI and AI stations, the measured value of the detection range D_ABR compared with the maximum value of the detection range D_RI with the RI station of the radiated radar signal at the carrier frequency f₁, under condition D_ABR > D_RI it is decided that the ABR stealth during its radiation operation is provided and the RI station does not detect or recognize the structure and parameters of the radiated ABR signal at carrier frequency f₁, in this case, ABR noise immunity is ensured, since jamming by the active jamming station (AJS) is not be performed, otherwise simultaneously with an increase of n times, where n is an integer or fractional number greater than one, the time of coherent accumulation of the signal in the ABR receiver, reducing by n times the average radiated power of the ABR transmitter, switching to another carrier frequency f_i, where i=2, I, where I is the total number of carrier frequencies of the probing signal, until condition D_ABR > D_RI is met, which indicates the provision of noise immunity of the pulse-Doppler ABR.

EFFECT: technical result achieved is to ensure the noise immunity of the pulse-Doppler ABR when it is operating on radiation and detecting the AT - the carrier of the RI and AI stations.

1 cl, 1 dwg