NOISE-IMMUNE DIFFERENCE-RANGE LOCAL RADIO NAVIGATION SYSTEM PROVIDING HIGH-PRECISION POSITIONING Russian patent published in 2023 - IPC G01C21/00 G01S3/46 G01S7/00 

FIELD: radio navigation.

SUBSTANCE: invention allows the implementation of a noise-resistant difference-range radio navigation system. The difference-range local radio navigation system is a local navigation system consisting of a network of transceivers of radio navigation reference stations (RS), transceivers of subscriber terminals (ST) and a hardware-software complex (HSC). The system implements a difference-range method of positioning, in which subscriber terminals receive navigation signals from reference stations and determine their coordinates, direction of movement and speed by the difference in the arrival time of signals from several reference stations. In addition, in the system, navigation data from subscriber terminals are transmitted to the HSC, which collects monitoring data and controls the operation of the radio navigation system by controlling the change of pseudo-random sequences (PRS) in RS and ST. The claimed system contains at least three radio navigation reference stations and is designed to operate in a non-request mode by synchronizing them, and the synchronization procedure repetition period is determined by the instability of the generators used in the RS. At the same time, the system uses methods of combating re-reflected signals by using a noise-resistant method of correlation processing of the noise-like navigation signal code in the transceiver of the user terminal and using noise-like navigation signals, the power of which at the reception point exceeds the signal power of global navigation satellite systems.

EFFECT: provision of high-precision positioning of subscribers and synchronization of radio navigation reference stations in a non-request mode using a difference-range positioning method with a practically unlimited number of system users and a high-precision method for correlation processing of noise-like signals, providing centimeter precision of positioning and high resistance to masking and imitation interference.

1 cl, 4 dwg, 2 tbl