RADIO-FREQUENCY EMISSION IDENTIFICATION METHOD Russian patent published in 2004 - IPC

FIELD: radio engineering; radio direction finders and radio-monitoring systems.

SUBSTANCE: proposed method that provides for identifying radio-frequency emissions at great a priori uncertain signal parameters, noise intensities, and also at different transfer constants of receiving channels, and ensures desired level of reliable identification probability of 0.9 and separation of emission sources with probability of minimum 0.8 at different directions toward emission sources between 2 and 8 deg. for signal-to-noise ratio of minimum 10 includes reception of radio emissions by means of antenna system composed of identical antennas and multichannel receiver; measurement of complex signal amplitudes for each of probable combinations of antenna pairs to obtain their squares and cross products; in addition it includes averaging of amplitude module squares according to range of combinations of antenna pairs and radio emissions P₁; determination of cross product modules and their averaging according to range of combinations of antenna pairs and radio emissions P₂; averaging of cross products of complex amplitudes of signals received by identical antenna pairs according to range of radio emissions and determination of modules which are averaged in their turn according to total combinations of antenna pairs P₃; evaluation of resolving statistics in the form of relationship of differences in averaged values which is compared with threshold set by Neimann-Pierson criterion on the basis of given probability of correct identification and quantity of combinations of antenna pairs.

EFFECT: enhanced reliability of correct identification of radio emissions under various conditions.

2 cl, 4 dwg