METHOD REALIZING ACCURATE NOISE-IMMUNE SYNCHRONIZATION OF REFERENCE STATIONS OF LOCAL NAVIGATION SYSTEM Russian patent published in 2024 - IPC G01S1/24 G01S19/01 G01C21/16 

FIELD: radio navigation.

SUBSTANCE: essence of the solution consists in the fact that in order to ensure positioning by means of user terminals (UT) navigation signals (NS) of radio navigation reference stations (RNRS) are received and coordinates, direction of movement and UT speed are determined. Monitoring is carried out, at which NS is transmitted from UT to hardware-software complex (HSC), controlling the operation of the radio navigation system by changing pseudorandom sequences (PRS) in the RNRS and AT, assigning one of the RNRS as the master, issuing a synchronization signal from the master RNRS to all the slave RNRS upon request, which is a dynamically varying noise-like NS, the synchronization repetition period is determined using the instability of the generators used at the RNRS, pseudo-ranges are measured between RNRS with known distance between phase centers of antennas, correlation processing of NS is performed by matched filtering of noise-like NS. To combat interference, the level of noise-like signals is 10,000 times higher than the level of GNSS signals and the level of signals is reduced relative to the interference based on the value of the NS base.

EFFECT: providing noise immunity of RNRS synchronization.

1 cl, 4 dwg