METHOD FOR INTEGRATING INFORMATION FROM A RADAR STATION AND RADAR HOMING HEADS OF MISSILES LAUNCHED BY A CARRIER AT AN AERIAL TARGET WHEN EXPOSED TO INTERFERENCE LEADING AWAY IN RANGE AND SPEED Russian patent published in 2022 - IPC G01S13/52 G01S7/41 

FIELD: radar technology.

SUBSTANCE: invention relates to the field of digital processing of radar signals and can be used in the radio detector station (radar) of the carrier and radar homing heads (RHH) of its guided missiles for simultaneous formation, when accompanied by an air target (AT) from the class “aircraft with a turbojet engine (TJE)”, reliable estimates of the joint or separate effects of interference leading away in range and speed or the absence of their effects and estimates of the radial functionally-related coordinates (FRC) of the mutual movement of the AT, the radar carrier, and the missiles launched by it at the AT with different variants of the impact of such interference. The method consists in identifying the joint or separate effect of interference leading away in range and speed, or its absence, with the simultaneous formation of reliable unconditional estimates of the range to the AT and the rates of approach of the radar carrier and the missiles launched by it with it when combining the information of the carrier radar, its indicator of the variant of the effect of leading interference and RHH missiles based on narrow-band Doppler filtering of signals reflected from the target in the carrier radar and RHH missiles launched by it using the fast Fourier transform procedure. In the method, Doppler frequency counts are formed due to the reflections of the signal from the airframe and the impeller blades of the first stage of the low-pressure compressor of the AT power plant. Doppler frequency counts generated in rockets are transmitted via radio correction channels to the carrier board. Further, both Doppler frequency counts allocated in the carrier radar and transmitted by missiles are processed, as well as indicator readings in the multichannel filter of the joint tracking of the AT and the first compressor component of the signal spectrum, and a variant of the effect of diverting interference is identified in accordance with the procedure of quasi-optimal joint filtering of phase coordinates and recognition of the state of the Markov structure of a linear stochastic dynamic system based on a priori data in the form of a mathematical model (MM) of the system “AT - carrier radar - RHH missiles – indicator” with a random jump-like structure (RJLS), including a linear model of the dynamics of radial FRC, a linear model of their complex measurements in the radar of the carrier and the RHH of the missiles launched by it, a Markov model of changing the variant of the effect of diverting interference, a Markov model of the indicator of the variant of the effect of diverting interference, a model of uncontrolled random disturbances and interference under initial conditions. At the output of the filter, estimates of the variant of the effect of diverting interference, the unconditional mathematical expectation of the FRC and the covariance matrix of errors in their estimation are formed.

EFFECT: increase in the reliability of estimating the radial functionally-related ranges to the AT and the speeds of approach of the radar carrier and the missiles launched by it with it, the variant of the effect of diverting interference on its part in the integrated surveillance system “radar carrier - indicator - RHH missiles”, increasing the reliability and stability of this system against auto-tracking failures.

1 cl, 1 dwg