DIFFERENCE-RANGE-FINDING METHOD FOR DETERMINING THE LOCATION OF A RADIO-FREQUENCY SOURCE IN MULTIPATH PROPAGATION OF RADIO WAVES Russian patent published in 2020 - IPC G01S5/06 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and specifically to methods for determining the location of radio-frequency radiation source (RFS), and can be used in navigation, direction-finding, location-based means for determining the location of RFS. At each of the receiving points (RP) with known coordinates, the signal RFS is received and the time of arrival of the signal is measured, then for all possible pairs RP with known coordinates the differences of arrival times of signals from RFS to RP of this pair are measured, differences of distances from measured differences of times arrival of signals from RFS to RP, generating a set of intermediate estimates of the coordinates of the RFS by determining, by a difference-range-finding method, an intermediate coordinate estimate (ICE) for each possible combination of three RP, detecting RP, located in conditions of multi-beam propagation of radio waves (MPRW), generating a final estimate of the coordinates of the RFS based on a set of intermediate estimates of the coordinates of the RFS based on the detected RPs in the conditions of multi-beam propagation of radio waves, wherein after formation of kit ICE RFS of these estimates are groups of at least four ICE RFS, for each group is calculated intra-group dispersion ICE RFS, detecting RPs in MPRW conditions is carried out based on exceeding by intra-group dispersions ICE RFS of the predetermined threshold, and to obtain the final coordinate estimate, calculating the arithmetic mean of ICE RFS not in MPRW conditions.

EFFECT: shorter time for estimating the location of RFS in conditions of MPRW, as well as enabling determination of coordinates of a moving RFS.

1 cl, 15 dwg