METHOD TO SUPPORT GROUP AIR TARGETS OF "AIRCRAFT WITH TURBOJET" CLASS IN RADAR LOCATION STATION AT EXPOSURE OF RATE INTERFERENCE Russian patent published in 2017 - IPC G01S13/52 

FIELD: radio engineering, communication.

SUBSTANCE: method consists in parallel maintenaning based on Kalman filtering the Doppler frequency samples (DF) caused by the signal reflections from the group airframes and the centroid DF samples caused by the signal reflections from the impeller blades of the first compressor stage of the low pressure group aircraft engines; identifying impacts or absence of the interference leading away by rate based on the calculation of the derivative difference modules between the DF estimates, caused by the signal reflections from the airframe of each group aircraft and the DF centroid, caused by the signal reflections from the impeller blades of the first compressor stage of the low pressure group aircraft engines; comparing the moduli of the DF derivative differences with a threshold; when they do not exceed the threshold that corresponds to the exposure absence of the interferences leading away by rate, the DF estimates are formed in the output, calculated in accordance with the Kalman filtering procedure on the basis of observations, otherwise a decision is made about the exposure of the interferences leading away by rate and in the outputs along with the DF estimates, which are not identified as the interferences leading away by rate, the DF estimates are formed calculated on the basis of the reciprocal movement model of the radar carrier and that group aircraft, the reflected signal from which has not yet been identified initially as the interferences leading away by rate.

EFFECT: increasedf reliability of Doppler frequency estimates due to convergence rate of radar location station carrier with each group aircraft upon exposure of rate interference.

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