M.L. Artemov, O.V. Afanasyev, I.S. Dmitriev, M.P. Slichenko

In work the structure of a matrix of correlation of the noise vector characterising as internal noise of amplifiers of antenna elements of a direction finder, and external restriction radio emissions of an aether and any number of sources of the small angular sizes is received. It is shown, that in case of the isotropic radio noise having uniform spatial distribution of capacity on a hemisphere, the matrix of correlation of noise is not diagonal. Expression for a matrix of correlation of isotropic radio noise in case of N-channel irection finder with a flat ring antenna lattice of radius from the identical linear not directed vibrators with rather small mutual influences and located in an azimuthal plane is resulted. It is shown, that azimuthal dependence error of estimation of direction arrival in case of isotropic radio noise reflects azimuthal anisotropy of an antenna array. The solving rule of as much as possible plausible algorithm of a direction finding is analysed, allowing to receive not displaced estimation of direction finder on a source of a flat monochromatic radio-wave in the presence of powerful restriction radio emissions sources of the small angular sizes. Not displaced of estimations of direction finding it is provided with substitution in solving rule of algorithm of a matrix of correlation of the noise characterising both internal noise of amplifiers of antenna elements, and external restriction radio emissions of a various origin. It is shown that the relief of direction finding corresponding to considered algorithm of direction finding, in case of presence restriction sources of the small angular sizes has superresolving failures on directions of sources of hindrances and a global maximum in a direction on a taken the bearings source. The estimation dispersion of direction finding corresponds to the bottom border of an inequality of Kramer-Rao, i.e. estimation is asymptotic effective.