RADIO-CONTRAST OBJECT DIRECTION TRACKING METHOD AND DEVICE Russian patent published in 2005 - IPC

FIELD: methods of tracking.

SUBSTANCE: super-high frequency signals are irradiated and signals reflected from radio-contrast object are received. Received signals after being processed are used for forming errors of direction finding two standardized signals Δ_h/Σ, Δ_v/Σ at horizontal and vertical planes correspondingly. Angles of rotation of aerial ϕ_ah and ϕ_av are measured at the planes and the estimation is made to determine whether receiving channels of direction finder are overloaded. If none of channels is overloaded then 1)values of angles of direction finding of radio-contrast object, angular velocities of direction finding observing line are estimated from signals of Δ_h/Σ, Δ_v/Σ ϕ_ah and ϕ_av and extrapolated values of angles of bearing of radio-contrast object are formed for any subsequent step of signal processing; 2) values of borders of solid angle are calculated in which angle the radio-contrast object could find its place at any subsequent step in accordance with calculations, then angle is divided to M angular positions ϕ_mh and ϕ_mv, where ; for each position the extrapolated value of density function of location of radio-contrast object is calculated at the angular position, in other words, the values of posterior density functions are calculated relatively angular position at which aerial is located at the moment for any angular position of ϕ_mh and ϕ_mv of possible direction finding of radio-contrast object, which values are used for calculating values of estimation of bearing of radio-contrast object at corresponding planes; 4) procedures should be done which are described for clause 2. Aerial control signals are formed and the described process of direction tracking of radio-contrast object is repeated. Radio-contrast object direction tracking device has aerial, aerial switch, quadrature converter, signal processing unit, transmitter, synchronizer, memorizing unit, digital-to-analog converter, first calculator, second calculator, device for detecting overload and two commutators. Device provides mode of direction tracking of any radar unit in case the receiving channels are overloaded as well as mode of operation at which angles of bearing of radio-contrast object are estimated on the base of calculation of posterior and extrapolated density functions for one step of signal processing of presence of radio-contrast object inside extrapolated bearing.

EFFECT: improved efficiency of operation; increased reliability.

3 cl, 4 dwg