METHOD FOR SINGLE-POSITION RADAR LOCATION OF MOBILE RADIO SIGNAL SOURCES ON ROAD NETWORK Russian patent published in 2018 - IPC G01S5/00 

FIELD: radar ranging and radio navigation.

SUBSTANCE: invention relates to radar and radio navigation and is intended to determine estimates of the location of mobile radio signal sources on a road network. Method is carried out as follows. At different times on the signals emitted by the radio signal source and containing its identification code, from one measuring point, the position of which is known, measure the angles of arrival of an electromagnetic wave (bearing) α_mes(t), α_mes(t+Δt). According to the measured bearing α_mes(t) and parametric bearing models αⁱ(e), given in the function of the natural parameter for each element of the road network, determine the values of the natural parameter corresponding to the intersection points of the position line for the measured bearing α_mes(t) and elements of the road network. Simultaneously with the emission of the signal at time t+Δt on the mobile source of the radio signal measure the length of the path passed by it in time Δt along the road network element. Signal proportional to the measured path length is encoded and the obtained code is transmitted over the radio channel of the data transmission to the measuring point at which, after receiving and decoding, the value of the measured path length Δe in time Δt. For each element of the road network, the calculated bearing values αⁱ(e*_j+Δe), corresponding to the movement of the mobile radio source by a distance Δe, and from the condition of a minimum discrepancy between them and a re-measured bearing α_mes(t+Δt) determine the numbers of the elements of the road network on which the mobile radio source may reside. Simultaneously with the emission of the signal at time t, the mobile source of the radio signal measures the angle of inclination of the tangent to the element of the road network θ_mes, on which the 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. By parametric models of the angle of inclination of the tangents to the elements of the road network θⁱ(e), given in the function of the natural parameter and to the values of the natural parameter corresponding to the intersection of the position line for the measured bearing α_mes(t) and elements of the road network, for each element of the road network, the calculated values of the inclination angles θⁱ(e*_j), and from the condition of the minimum deviation between them and the measured angle θ_mes determine the numbers of the elements of the road network on which the radio source may be located. From the comparison of these numbers with the numbers obtained from the condition of the minimum discrepancy between the calculated bearing values and the re-measured bearing, determine the number of the element of the road network on which the mobile radio source is located, the location coordinates of the mobile radio source are determined as the coordinates of the intersection of the position line corresponding to the measured bearing (α_mes(t) or α_mes(t+Δt)) and the element of the road network on which the mobile radio source is located.

EFFECT: expansion of the capabilities of the method of single-position radar.

1 cl, 2 dwg