Patent RU-2572809-C1 (RU)
Inventor: BEREZHNAJA VIKTORIJA VIKTOROVNA
IPC: G01S5/00
Filed: 2015-01-27
Granted: 2016-01-20
Abstract: FIELD: radio engineering, communication. 
     SUBSTANCE: method comprises, at different moments in time from one measuring station whose position is known, measuring angles of arrival of an electromagnetic wave (bearing) based on signals emitted by a mobile radio signal source and containing an identification code thereof; simultaneously with the emission of a signal at a time t at the mobile radio signal source, measuring the velocity thereof along an element of a road network; encoding a signal which is proportional to the measured velocity and transmitting the obtained code over a wireless data link to the measuring station where, after receiving and decoding, the value of the measured velocity is obtained; determining the length of the path travelled over the time Δt; based on the measured bearing α meas (t) and parametric bearing models given in the natural parameter function for each element of the road network, determining the natural parameter values corresponding to the intersection points of the position line for the measured bearing and elements of the road network; for each of the said elements, determining calculated values of bearings corresponding to the movement of the mobile radio signal source by a corresponding distance; based on the condition of the minimum mismatch between the said values and the re-measured bearing α meas (t+Δt), determining the number of elements of the road network on which the mobile radio signal source may be located; simultaneously with signal emission at a time t on a mobile radio signal source, measuring the inclination angle of the tangent to the element of the road network on which the mobile radio signal source is located; encoding the signal which is proportional to the measured angle and transmitting the obtained code over a wireless data link to the measuring station where, after receiving and decoding, the value of the measured angle is obtained; based on parametric models of the inclination angles of tangents to the elements of the road network, given in the natural parameter function, for each element of the road network and natural parameter values corresponding to the intersection points of the position line for the measured bearing and elements of the road network, for each element of the road network, determining calculated values of inclination angles; based on the condition of the minimum mismatch between the said values and the measured inclination angle of the tangent to the element of the road network, determining the number of elements of the road network on which the mobile radio signal source may be located; by comparing the said numbers with the numbers obtained from the condition of the minimum mismatch between the calculated bearing values and the re-measured bearing, determining the number of the element of the road network on which the mobile radio signal source is located; corresponding coordinates of the mobile radio signal source are determined as the coordinates of the point of intersection of the position line corresponding to the measured bearing (α meas (t) or α meas (t+Δt)) and the selected element of the road network. 
     EFFECT: broader capabilities for the unambiguous location of a mobile object on a plurality of possible configurations of a road network. 
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