RANGING-DIFFERENTIAL-RANGING METHOD FOR DETERMINING COORDINATES OF RADIO-FREQUENCY RADIATION SOURCES AND APPARATUS REALISING SAID METHOD Russian patent published in 2014 - IPC G01S3/46 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio monitoring systems for determining coordinates of radio-frequency radiation sources (RFS). The disclosed method is based on receiving RFS signals with antennae, measuring the time difference of receiving signals from the RFS at multiple points in space with scanning radio receivers, transformed into a system of equations, and is also based on using two identical, stationary radio monitoring stations (RS), one of which is taken as the master station, by connecting with another communication line, wherein the device for measuring the delay in arrival of signals at the RS is calibrated using reference radio-electronic means (REM) with known signal parameters and coordinates; the RS then performs quasi-synchronous scanning and measures signal levels at given fixed tuning frequencies and the delay in arrival of RFS signals. Information from the slave RS is transmitted to the master RS, where the ratio of levels and difference in delay in arrival of RFS signals are calculated based on results of calibrating measuring devices, and two equations of the position of the RFS are compared, each describing a circle with the radius being equal to the distance from the RS to the RFS. Distances are determined through the ratio of signal levels and the time difference of signal reception, measured at the RS using only one pair of antennae with a known azimuth of the axis of the main lobe and a beam pattern, the main lobe of each of which lies in different half-planes relative to the base line, and coordinates of RFS are determined using a numerical method of solving the constructed equations, taking as true only coordinates associated with that half-plane relative to the base line in which the main lobe of the antenna with the highest level of the received signal is located. The apparatus which realises this method has two identical RS, one of which is the master RS, and each station has directional antennae, a measuring scanning radio receiver, a device for measuring the delay in signal arrival, a computer and a communication device, connected to each other in a certain manner.

EFFECT: reduced hardware costs.

2 cl, 2 dwg