NOISE-IMMUNE RANGEFINDER LOCAL RADIO NAVIGATION SYSTEM PROVIDING HIGH-PRECISION POSITIONING Russian patent published in 2022 - IPC G01S5/10 

FIELD: radio navigation.

SUBSTANCE: invention relates to the field of radio navigation. The effect is achieved by the fact that the rangefinder local radio navigation system, which provides high-precision positioning, uses a navigation signal free from the influence of the ionosphere, troposphere and errors in determining the ephemeris of satellites, independent of global navigation satellite systems, solving both the problem of positioning and the problem of monitoring objects, contains transceivers at reference stations and user terminals, uses an interrogation mode and a rangefinder positioning method in the absence of synchronization of reference stations, provides centimeter positioning accuracy using a noise-immune method for signal code correlation processing, as well as resistance to generated imitation interference using dynamically changing according to a complex law pseudo-random sequences, resistance to retransmitted imitation interference using methods for combating re-reflected signals nalami, resistance to masking interference using high-power noise-like signals at the receiving point, for which the noise suppression at the output of the matched power filter is 2 V times, where B is the signal base.

EFFECT: ensuring high-precision positioning of subscribers in the interrogation mode using a rangefinding positioning method that provides centimeter positioning accuracy using a noise-resistant method for correlation processing of noise-like signals and high resistance to masking and imitation interference.

1 cl, 5 dwg, 2 tbl