METHOD OF DETERMINING COORDINATES OF AERIAL TARGETS IN MULTI-POSITION RADAR SYSTEM IN CONDITIONS OF LOW SIGNAL-TO-NOISE RATIO Russian patent published in 2020 - IPC G01S13/42 

FIELD: physics.

SUBSTANCE: invention relates to radars. Technical result is achieved by the fact that transmitters with known coordinates x_1,i, y_1,i, z_1,i, i = 1, 2, …, I emit orthogonal relative to each other phase-coded nonlinearity signals, which are scattered by air targets with unknown coordinates x_3n, y_3n, z_3n, n = 1, 2, …, N; in terrestrial receiver with known coordinates x₂, y₂, z₂, synchronized with transmitters, envelopes of correlation functions X_i (τ) of received signals emitted by transmitters and reflected by air targets are calculated τ, and reference signals, which are delayed copies of signals of transmitters; hypothesis is formulated that the target is located at the point with coordinates x_3r, y_3r, z_3r and within it appropriate hypothetical delays are calculated for each envelope of the correlation function, for the tested point the value of the total envelope of the correlation function is formed, which is obtained by summation of readings of all envelopes of correlation functions X_i (τ), delay of which corresponds to hypothetical delays τ_i,r,2 calculated for them within the tested hypothesis; virtual survey of space and verification of all hypotheses X_∑(x_3,r, y_3,r, z_3,r) on determination of air target 3.n at specified points of space values of total envelope of correlation function from coordinates of checked point (x_3,r, y_3,r, z_3,r), considering the criterion of correctness of the tested hypothesis on the finding of air target 3.n at the point (x_3,r, y_3,r, z_3,r) exceeding the established threshold by the value of the total envelope of the correlation function. Number of points in which the value of the total envelope of the correlation function exceeds the threshold H, corresponds to the number of observed targets N.

EFFECT: invention can be used to determine coordinates of aerial targets in a multi-position radar system under conditions of low signal-to-noise ratio, which is the technical result.

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