RADAR TARGETS ON THE BACKGROUND OF UNDERLYING SURFACE SELECTION METHOD Russian patent published in 2019 - IPC G01S13/52 

FIELD: radar ranging.

SUBSTANCE: invention relates to the radar ranging and can be used in radars, which provide for the scattering complete polarization matrix (PM) obtaining. Radar targets on the background of the underlying surface selection method comprises the target irradiation with two linearly orthogonally polarized waves, the reflected waves reception, their division into the vertical and horizontal components, forming the matrix based on polarization characteristics, wherein the target and the background irradiation is carried out by the linearly polarized waves, emitted in frequency band of not less than 20 MHz, the scattered waves division into the vertical and horizontal polarization components, at that, recording amplitudes of horizontally emitted polarization – horizontally received, of horizontally emitted polarization – vertically received, vertically emitted polarization – horizontally received, of vertically emitted polarization – vertically received, forming the complete PM for each i-th range strobe, which size is determined by the probing signal spectrum width, successively obtained scattering PM for each i-th range strobe are converted into the observation matrix A, which components are the signal amplitudes complex values, at that, the observation matrix each row corresponds to the scattered signal polarization components, and the lines number corresponds to the processed range resolution elements number, matrix dimension 4_*n, where n is the processed strobes number, normalizing the obtained matrix, forming the correlation matrix, for which calculating the eigen values and the eigen vectors, forming, thus, the new coordinate system, and then on the obtained new coordinate system axes projecting the normalized observation matrix A, as a result, obtaining the observations contributions matrix VK over the range, which is used for the target selection on the underlying surface background, at that, the target search and detection is first performed by signal level in the observations contributions matrix first column, and for the target against the underlying surface identification the rest columns signals are used.

EFFECT: increase in the radar targets detection reliability.

1 cl, 6 dwg, 5 tbl