Satellite-aided radio navigation positioning method and radio navigation system therefor

Abstract

A method for radio navigation positioning with the aid of satellites, in accordance to which a radio navigation signal is generated on board the satellites (1) by modulating the carrier frequency (f.sub.c) with an assemblage of signals including a pseudorandom sequence, the navigation data, and a synchronization code, and the object-users (2) determine their positioning, speed of mation and a correction factor to the time scale during reception and processing of the radio navigation signal. According to the invention, each satellite or pair of mutual opposite satellites on an orbital plane are ascribed individual carrier frequencies (f.sub.cj, f.sub.ck) and use a common to all satellites (1) pseudorandom M-sequence of truncated length, dibit coding of navigation data symbols and synchronization code of shortened repetition period and increased number of symbols. According to the invention, the radio navigation system completely implements this method on board each satellite (1) in the radio navigation signal generating and transmitting system and at each object-use (2) in the radio signal reception and processing subsystem. This improves the probability of navigation positioning at any instant of time with a high accuracy by practically completely eliminating the effects of intersystem interference and also substantially shortens the time of navigation positioning.

Dependencies are inferred from the claim text.