M.L. Artyomov – Dr. Sc. (Eng.), Associate Professor, Director of STC «REB and spetssvyaz», 

JSC «Concern «Sozvezdie» (Voronez)

E-mail: artemov@sozvezdie.su

E.L. Abramova – Senior Engineer, JSC «Concern «Sozvezdie» (Voronez) E-mail: ntu541@sozvezdie.su

Developed within the limits of the theory of statistical radio engineering the method of as much as possible probable grouping of countings Fast Fourier transform (FFT) on an accessory to a signal of one Radio frequency radiation source is adaptive to a priori unknown value of intensity of noise. The method is valid in case of the arbitrary matrix of coefficients of correlation of noise and assumes comparing of solving statistics of a method with a grouping threshold. The threshold is selected according to NeumannPirsona criterion proceeding from demanded value of probability of a false alarm - acceptances of the erratic decision on an accessory of spectral countings to a signal same Radio frequency radiation source.

The method allows to carry out an identification of spectral components of signals before procedure carrying out direction finding sources of a radio frequency radiation and assumes performance of following procedures. In a cycle on all «signal» countings FFT of a current band of the instant analysis on each pair of adjacent countings the solving statistics also is led its comparing with a grouping threshold. In case of inequality omission the decision that two given countings FFT belong to signals different Radio frequency radiation source is made, otherwise - both countings are considered as inherings to a signal of one Radio frequency radiation source. Further value of solving statistics is formed on the second counting of the given pair and following «signal» counting, inequality performance etc. As a result of grouping performance is checked the band width and center frequency of each signal, and also indexes of countings FFT belonging to one signal are defined an amount of signals in an analysis band. On countings FFT of each signal the matrix of mutual energies is formed and fulfilled direction finding Radio frequency radiation source.

Application of the given method in subsystems of radioprospecting of perspective complexes of radio-electronic struggle allows to raise accuracy figures and high-speed performance of functioning of subsystems of radioprospecting of perspective complexes of radio-electronic struggle.

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