CORRELATION-PHASE DIRECTION FINDER Russian patent published in 2020 - IPC G01S3/46 

FIELD: radio navigation.

SUBSTANCE: invention relates to radio navigation and can be used to determine angular coordinates of phase-shift keyed (PSK) radio signal sources with known coding laws in the presence of radio interference. Correlation-phase direction-finder comprises two antennae, two high-frequency HF-unit, two demodulators, two spectro-analyzers, spectrum comparison unit, two memory devices (MD), a control panel, a code generation unit, two matched filters which, at their outputs, generate cross-correlation functions between the input phase-shift keyed signal and the code contained therein, and a delay meter between the maxima of the cross-correlation functions, wherein output of control panel is connected to input of code generation unit, which output is connected to control inputs of matched filters, information inputs of first and second matched filters are connected to corresponding outputs of first and second high-frequency units, and outputs are connected to inputs of demodulators, one of inputs of delay meter is connected to output of spectral comparison unit, and two other inputs are connected to outputs of memory devices, respectively, wherein determining the angular coordinate of the radiation source at the output of the delay meter using the formula α=arcsin(τ/d), where τ is the difference in time of arrival of the wave front to two d-spaced apart receiving antennas.

EFFECT: high signal-to-interference ratio, eliminating ambiguity of bearing detection, wider range of measuring angular coordinates.

1 cl, 1 dwg