METHOD FOR TAKING TWO-DIMENSIONAL BEARING AND DETECTION FREQUENCY OF RADIO SOURCES Russian patent published in 2000 - IPC

FIELD: radio engineering, in particular, combined searching and bearing detection with respect to azimuth and angle of elevation. SUBSTANCE: method involves direct two-dimensional Fourier transform with respect to time and space for set of signals which are received by ring array of N elementary antennas. For each time frequency and for fixed pointing directions for angle of elevation, method involves q times multiplication of each space frequency constituent produced by Fourier transform by Fourier image of pointing function, which depends on frequency, elevation angle, parameters of antenna array and azimuthal cyclic shift 2П_q/M. Then method involves q spatial reverse Fourier transforms of produced set of corrected spatial frequency constituents, detection of signal presence, and evaluation of azimuth and angle elevation of its source for each frequency. EFFECT: increased precision for bearing taking for source of signals received by ring antenna array with arbitrary number of elementary antennas. 1 dwg