METHOD FOR DETERMINING COORDINATES OF AIRCRAFT BASED ON SIGNALS FROM UNSYNCHRONIZED JAMMERS TO GLOBAL NAVIGATION SATELLITE SYSTEMS Russian patent published in 2024 - IPC G01C21/00 G01S7/38 G01S19/01 H04K3/00 

FIELD: radio navigation in electronic warfare conditions.

SUBSTANCE: invention be used in the development of a local radio navigation (LRN) system based on signals from unsynchronized domestic means of electronic jamming of global navigation satellite systems (GNSS). In the claimed method, the NEAC uses a heading meter that provides measurement of the heading angle between the direction to the north and the construction axis of the aircraft, and a receiving device consisting of K antennas forming an antenna array oriented relative to the construction axis of the aircraft, K receivers, K analog-digital converters, K digital M-channel correlators, digital computer, frequency synthesizer and read-only memory. The receiving device provides independent processing of the total interference signal of the interference transmitters of all intentional radio jamming stations (IRJS) in every k-th channel , correlation processing of the digital sum signal in each k-th digital correlator of the receiving device with determination of estimates of the phase of the transmitter signal of each m-th IRJS at the time of recording the response in each k-th channel, formation of column vectors of coefficients due to the phase shift in the central and in each peripheral channel of the receiving device. A directivity matrix of the antenna array is preliminarily formed, depending on its geometric parameters and determining the phase shifts of the signals in each peripheral antenna relative to the signal in the central antenna when the signal arrives from a given direction. Next, the direction to each m-th IRJS is assessed relative to the construction axis of the aircraft based on the maximum value of the spatial spectrum obtained by multiplying the antenna array directivity matrix and the column vector of coefficients caused by the phase shift of the transmitter signal responses of the corresponding m-th IRJS, and the azimuth of signal arrival of m-th IRJS transmitter is estimated, the planar coordinates of the aircraft are estimated using the goniometric method by solving a system of equations relating the planar coordinates of the aircraft, the azimuth values of signal arrival of each m-th interference transmitter and the known planar coordinates of the interference transmitters.

EFFECT: determining the coordinates of an aircraft using interference signals from unsynchronized transmitters of interference to global navigation satellite systems without implementing an additional mode of initial synchronization of the navigation equipment of authorized consumers (NEAC).

1 cl, 11 dwg