METHOD OF DETERMINING COORDINATES AND VELOCITY OF RADIO-FREQUENCY SOURCE Russian patent published in 2015 - IPC G01S5/04 

FIELD: radio engineering, communication.

SUBSTANCE: method is based on calculating the number N of elementary referencing zones of possible location of a radio-frequency source, determining coordinates of the centres of the elementary referencing zones, assigning each elementary referencing zone an index number n=1, 2, …, N, defining the frequency band ΔF, wherein the method includes receiving signals, breaking down the frequency band ΔF into P subbands with a width Δf, assigning each subband an index number p=1, 2, … P, determining for R interlinked peripheral and central direction-finding stations with known location, each including M antenna elements, values of reference primary spatial information parameters at outputs of all antenna elements, which are calculated for mean frequencies of all frequency subbands, receiving signals of radio-frequency sources in the given frequency band ΔF with all direction-finding stations, measuring the primary spatial information parameters for each antenna element of all direction-finding stations and transmission thereof from peripheral direction-finding stations to a central direction-finding station; before determining reference primary spatial information parameters, defining the ranges of possible values of velocity components of the radio-frequency source, breaking down said ranges into G channels each, assigning each channel an index number c=1, 2 … G, d=1, 2 … G, defining the processing interval, which is defined by the width of the subband, and the signal accumulation time, for each channel of velocity components, of each elementary referencing zone, of each antenna element of all direction-finding stations, determining the values of reference primary spatial information parameters, measuring the primary spatial information parameters of the received signals based on the expected position of the radio-frequency source in each frequency subband, on each antenna element of all direction-finding stations; further, for each elementary referencing zone of each antenna element of all direction-finding stations, of each frequency subband and for each channel of velocity components, determining the product of measured and reference primary spatial information parameters, summing the obtained products on all antenna elements, finding the modulus of the sum and summing the result on frequency channels and, based on the position of the maximum of the resultant sum, determined from the set of values of the sum at discrete points n, c, d, determining coordinates and velocity of the radio-frequency source.

EFFECT: determining coordinates and velocity of a radio-frequency source simultaneously in a single processing step.

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