METHOD OF DETERMINING, BASED ON MEASURED RELATIVE RANGES OF COORDINATES OF A RADIO-FREQUENCY SOURCE Russian patent published in 2020 - IPC G01S5/06 

FIELD: radio navigation.

SUBSTANCE: invention relates to radio navigation and can be used to determine spatial coordinates (SC) of a radio-frequency source (RS) located on a stationary or mobile object. On the object, a radio signal is synchronously generated and transmitted in the form of four components, each of which is a harmonic oscillation with a given frequency. At each station, a radio signal transmitted from an object is synchronized quadrature reception. Its digital quadrature components (DQC) are formed in contact with preset sampling frequency and number of cycles in the cycle. Next four pairs of quadrature components (QC) corresponding to the components of the transmitted signal are formed in the form of DQC. Then four pairs of quadrature components are formed by summation of each obtained QC of the corresponding pair. Using the obtained quadrature components, method includes forming the parameters given in the method and determining time delays based on the generated parameters, which are transmitted to a single center for receiving and processing radio signals, where they are corrected excluding known in the center time shifts occurring when receiving radio signals and processing at stations. Corrected time delays and when the conditions specified in the method are met unambiguously determine relative ranges to RS from station antennae. Spatial coordinates RS are uniquely determined from relative distances. Method allows excluding the effect of reflected, for example, ground signals and random phases of transmitter heterodynes and receivers. No synchronization is required between the RS and the set of receiving stations.

EFFECT: unambiguous determination of SC RS.

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