METHOD FOR RADIO SIGNAL DIRECTION FINDING AND DIRECTION FINDER FOR REALISING SAID METHOD Russian patent published in 2014 - IPC G01S3/14 

FIELD: radio engineering, communication.

SUBSTANCE: method involves successive synchronous conversion of high-frequency signals simultaneously from all N antenna elements to a digital form, simultaneous measurement in each frequency subband at coinciding time intervals of complex spectra of pairs of signals for all N·(N-1)/2 pairs of antenna elements used in processing, determining the resultant of complex-conjugated spectra, simultaneously determining the phase difference of radio signals Δφ_l,h,meas(f_ν) for all N·(N-1)/2 pairs of antenna elements and each frequency subband via Fourier transform, determining and storing reference phase differences of signals for all possible directions of arrival of radio signals, calculating the value of the variance function of phase difference discrepancies on all angular parameters, generating for each pair of antenna elements used based on the values of Δφ_l,h,meas(f_ν) the final family of cones of possible directions towards a source and a set of non-crossing circles of directions, storing points of intersection of circles of directions from different pairs of antenna elements, determining values of the variance function of phase difference discrepancies F(f_ν) for points of intersection of circles of directions and the minimum therefrom minH(f_ν), local optimisation of minH(f_ν) by comparing with closest values of H(f_ν), determining the most probable direction of arrival of the radio signal from the least value of minH(f_ν)_onm. The direction finder which carries out the method further includes a unit for generating cones and circles of directions, a unit for determining points of intersection of circles of directions and a unit for searching for the global extremum, connected in a certain manner with each other and the rest of the components of the disclosed direction finder.

EFFECT: shorter time spent on evaluating spatial parameters of signals.

2 cl, 8 dwg