METHOD OF RECOGNIZING A VERSION OF GUIDANCE OF A MOBILE OBJECT ON ONE OF AIRCRAFTS OF A GROUP Russian patent published in 2020 - IPC G01S13/52 

FIELD: data processing.

SUBSTANCE: invention relates to digital processing of radar signals and can be used in radar station (RS) to generate valid estimates of radial functionally related coordinates (FRC) of mutual movement of aircrafts (AC) of group and mobile object (MO), as well as recognition of MO guidance option to one of AC group. Method consists in estimation of radial FRC mutual movement of AC group and MO and identification of version of its guidance to one of AC group by approximation of obtained estimates to their optimum values due to consideration of influence of MO guidance on FRC dynamics, integrating RS information and onboard defense complex (OBDC), accounting for a priori data on change of missile guidance option and adaptation of filter to these shifts based on narrowband Doppler filtration of signal reflected from MO, using procedure of fast Fourier transform, generating readings of Doppler frequencies caused by reflection of the signal from the housing MO, processing the generated Doppler frequency readings and the OBDC output readings in the multichannel combined tracking filter MO and recognizing the guidance version thereof, functioning in accordance with procedure of quasi-optimal combined filtration of phase coordinates and recognition of state of Markov structure of linear stochastic dynamic system, operating on the basis of a priori data in the form of a mathematical model of the "mobile object – RS – OBDC – group AC" system with a random step-like structure, including linear dynamics models of radial FRC mutual movement of the group AC and MO, their measurements in the RS, Markov change of guidance MO, Markov indicator MO guidance version, presented by OBDC, uncontrolled random disturbances and interference under initial conditions, at the output of which estimations of MO guidance option are generated for one of AC groups, unconditional mathematical expectation of FRC mutual movement of AC group and MO and unconditional covariance matrix of their estimation errors.

EFFECT: high reliability of estimating radial FRC mutual movement of the AC group and the MO and identifying the guidance version thereof on one of the AC groups.

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