FIELD: physics, radio.
SUBSTANCE: invention relates to radio engineering and particularly to radio direction finding. The technical result is significant simplification, minimisation of the number of components and apparatus for portable direction finders when locating single (separate) signals, faster operation and higher accuracy of determining azimuthal and elevation components of bearings and amplitude of signals when receiving radio signals from one radio source using annular antenna systems, having two non-synchronised detection channels. Faster determination of bearings is achieved by reducing the algorithm of determining signal parameters to direct calculation using elementary formulae. The disclosed method involves selecting three components of a circular antenna system in which there is constant phase shift φ, caused by non-synchronisation of the channels, and successive paired sorting of the selected components of the antenna system to restore the complex amplitude vector of signals y1, y2, y3, y4, y5, y6 from outputs of the selected components of the antenna system. Signals y1, y2, y3, y4, y5, y6 are transmitted to a first divider to obtain the ratios (y2/y1), (y4/y3), (y6/y5). The obtained ratios are then transmitted to a second divider to obtain the following ratios: (y2y3)/(y1y4), (y2y5)/(y1y6), (y4y5)/(y3y6). These ratios are transmitted to a computer for logarithmation thereof and obtaining values of trigonometric tangents of three estimates of azimuthal bearings and the average estimate of the tangent of the azimuthal bearing therefrom, and the angle of the azimuthal bearing is then determined through an arctangent function. Like the average estimate of the tangent of the azimuthal bearing, the average estimate of the cosine of the elevation angle is determined using other formulae, and the elevation angle itself is then determined through an arccosine function. The amplitude of the signal from the radio source is then determined from any equation of the restored complex amplitude vector of signals y1, y2, y3, y4, y5, y6. Additionally, to increase accuracy of results, statistical dispersion of the obtained values of the azimuthal and elevation bearings and the amplitude of the signal from the radio source is determined.
EFFECT: method is simple in terms of computational costs, and can therefore be used in direction finding systems where high speed of operation is the most critical requirement for algorithms.
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